Category Archives: Induced Pluripotent Stem Cells

Global Induced Pluripotent Stem Cells Market Industry Analysis, Post COVID-19 Impact, Emerging Trends, Business Growth by 2027||Fate Therapeutics,…

Induced Pluripotent Stem Cells market research report comprises of several parameters which are thoroughly studied by the experts. Market research analysis and data lend a hand to businesses for the planning of production, product launches, costing, inventory, purchasing and marketing strategies. This market study considers a market attractiveness analysis, where each segment is benchmarked based on its market size, growth rate, and general attractiveness. Market info can be explained more specifically in terms of breakdown of data by manufacturers, region, type, application, market status, market share, growth rate, future trends, market drivers, opportunities, challenges, emerging trends, risks and entry barriers, sales channels, and distributors.

Induced pluripotent stem cells (iPSCs) marketis expected to gain market growth in the forecast period of 2020 to 2027. Data Bridge Market Research analyses the market to account to USD 2,442.97 million by 2027 growing at a CAGR of 7.5% in the above-mentioned forecast period. Increasing R&D investment activities is expected to create new opportunity for the market.

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Few of the major competitors currently working in global induced pluripotent stem cells market areFUJIFILM Holdings Corporation, Astellas Pharma Inc, Fate Therapeutics, Bristol-Myers Squibb Company, ViaCyte, Inc., CELGENE CORPORATION, Vericel Corporation, KCI Licensing, Inc, STEMCELL Technologies Inc., Japan Tissue Engineering Co., Ltd., Organogenesis Holdings Inc, Lonza, Takara Bio Inc., Horizon Discovery Group plc, Thermo Fisher Scientific.

Global Induced Pluripotent Stem Cells Market Drivers:

Increasing R&D investment activities is expected to create new opportunity for the market.

Increasing demand for personalized regenerative cell therapies among medical researchers & healthcare is expected to enhance the market growth. Some of the other factors such as increasing cases of chronic diseases, growing awareness among patient, rising funding by government & private sectors and rising number ofclinical trialsis expected to drive the induced pluripotent stem cells (iPSCs) market in the forecast period of 2020 to 2027.

High cost of the induced pluripotent stem cells (iPSCs) and increasing ethical issues & lengthy processes is expected to hamper the market growth in the mentioned forecast period.

Global Induced Pluripotent Stem Cells (iPSCs) Market Scope and Market Size

Induced pluripotent stem cells (iPSCs) market is segmented of the basis of derived cell type, application and end- user. The growth amongst these segments will help you analyse meagre growth segments in the industries, and provide the users with valuable market overview and market insights to help them in making strategic decisions for identification of core market applications.

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Global Induced Pluripotent Stem Cells Market Industry Analysis, Post COVID-19 Impact, Emerging Trends, Business Growth by 2027||Fate Therapeutics,...

Bayer’s BlueRock Therapeutics gains FDA fast track for Parkinson’s disease cell therapy – PMLiVE

The US Food and Drug Administration (FDA) has granted BlueRock Therapeutics a fast track designation for its cell therapy candidate DA01 for advanced Parkinsons disease.

BlueRock a Bayer subsidiary is currently evaluating the pluripotent stem cell-derived dopaminergic neuron therapy in a phase 1 study.

This early-stage trial is set to enrol ten patients across the US and Canada, with its primary objective to assess the safety and tolerability of DA01 cell transplantation at one-year post-transplant.

As a secondary objective, BlueRock will assess the evidence of transplanted cell survival and motoreffects at one- and two-years post-transplant and evaluate the continued safety and tolerability at two years, as well as the feasibility of transplantation.

Receiving fast track designation from the FDA is an important step, which will help us further accelerate clinical development of our DA01 cell therapy approach for Parkinsons disease, said Joachim Fruebis, chief development officer of BlueRock.

This is another critical step in the BlueRock mission to create authentic cellular medicines to reverse devastating diseases, with the vision of improving the human condition, he added.

In 2019, Bayer bought out its private equity partner Versant Ventures and founders in BlueRock Therapeutics for $240m, three years after setting up the company.

The decision gave Bayer complete control of BlueRocks cell therapy pipeline, headed by DA01 and spanning various diseases in the neurology, cardiology and immunology categories.

BlueRock was set up in late 2016 with $225m in start-up funding from Bayer and investment firm Versant, shortly after Bayer backed gene-editing specialist Casebia via its Leaps by Bayer investment arm.

BlueRocks induced pluripotent stem cells (iPSCs) platform is designed to encourage PSCs to differentiate into the dopaminergic neurons that are progressively destroyed in Parkinsons disease.

The hope is that introducing these neurons into areas of the brain where neurons are depleted will lead to increased dopamine release, restoring motor function.

The company is also developing iPSCs that differentiate into microglia, oligodendrocytes and eneic neurons for neurology applications, cardiomyocytes for heart failure, as well as macrophages and T regulatory cells for immunology applications including immune tolerance, fibrosis and graft-versus-host disease (GvHD).

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Bayer's BlueRock Therapeutics gains FDA fast track for Parkinson's disease cell therapy - PMLiVE

Global Induced Pluripotent Stem Cell (iPSC) Market to Reach $2.3 Billion by 2026 – PRNewswire

FACTS AT A GLANCE Edition:9;Released:April 2021 Executive Engagements:1737 Companies:51 - Players covered include Axol Bioscience Ltd.; Cynata Therapeutics Limited; Evotec SE; Fate Therapeutics, Inc.; FUJIFILM Cellular Dynamics, Inc.; Ncardia; Pluricell Biotech; REPROCELL USA, Inc.; Sumitomo Dainippon Pharma Co., Ltd.; Takara Bio, Inc.; Thermo Fisher Scientific, Inc.; ViaCyte, Inc. and Others. Coverage:All major geographies and key segments Segments:Cell Type (Vascular Cells, Cardiac Cells, Neuronal Cells, Liver Cells, Immune Cells, Other Cell Types); Research Method (Cellular Reprogramming, Cell Culture, Cell Differentiation, Cell Analysis, Cellular Engineering, Other Research Methods); Application (Drug Development & Toxicology Testing, Academic Research, Regenerative Medicine, Other Applications) Geographies:World; USA; Canada; Japan; China; Europe; France; Germany; Italy; UK; Rest of Europe; Asia-Pacific; Rest of World.

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Global Induced Pluripotent Stem Cell ((iPSC) Market to Reach $2.3 Billion by 2026Induced pluripotent stem cells (iPSCs) hold tremendous clinical potential to transform the entire therapeutic landscape by offering treatments for various medical conditions and disorders. These cells are derived from somatic cells like blood or skin cells that are genetically reprogrammed into embryonic stem cell-like state for developing an unlimited source of a diverse range of human cells for therapeutic applications. The global market is propelled by increasing demand for these cells, rising focus on researchers in the field, and their potential application in treatment of various diseases. The market growth is supplemented by rising prevalence of several chronic disorders such as diabetes, heart disease, stroke and cancer. Moreover, increasing awareness about stem cells and associated research, potential clinical applications and rising financial assistance by governments and private players are expected to contribute significantly to the market expansion. The iPSC technique is anticipated to find extensive adoption in the pharmaceutical industry for developing efficient cell sources like iPSC-derived functional cells to support drug screening and toxicity testing.

Amid the COVID-19 crisis, the global market for Induced Pluripotent Stem Cell ((iPSC) estimated at US$1.6 Billion in the year 2020, is projected to reach a revised size of US$2.3 Billion by 2026, growing at a CAGR of 6.6% over the analysis period. Vascular Cells, one of the segments analyzed in the report, is projected to record a 7.2% CAGR and reach US$835.8 Million by the end of the analysis period. After a thorough analysis of the business implications of the pandemic and its induced economic crisis, growth in the Cardiac Cells segment is readjusted to a revised 7.9% CAGR for the next 7-year period. The demand for iPSC-derived cardiac cells is attributed to diverse applications including cardiotoxicity testing, drug screening and drug validation along with metabolism studies and electrophysiology applications.

The U.S. Market is Estimated at $767.1 Million in 2021, While China is Forecast to Reach $82.4 Million by 2026The Induced Pluripotent Stem Cell ((iPSC) market in the U.S. is estimated at US$767.1 Million in the year 2021. China, the world`s second largest economy, is forecast to reach a projected market size of US$82.4 Million by the year 2026 trailing a CAGR of 8.5% over the analysis period. Among the other noteworthy geographic markets are Japan and Canada, each forecast to grow at 5.5 % and 6.8% respectively over the analysis period. Within Europe, Germany is forecast to grow at approximately 6.5% CAGR. North America leads the global market, supported by continuing advances related to iPSC technology and access to functional cells used in pre-clinical drug screening. The market growth is supplemented by increasing insights into the iPSC platform along with high throughput analysis for drug toxicity. The iPSC market in Asia-Pacific is estimated to post a fast growth due to increasing R&D projects across countries like Australia, Japan and Singapore.

Neuronal Cells Segment to Reach $336.9 Million by 2026In the global Neuronal Cells segment, USA, Canada, Japan, China and Europe will drive the 6.4% CAGR estimated for this segment. These regional markets accounting for a combined market size of US$202.9 Million in the year 2020 will reach a projected size of US$308 Million by the close of the analysis period. China will remain among the fastest growing in this cluster of regional markets. Led by countries such as Australia, India, and South Korea, the market in Asia-Pacific is forecast to reach US$19.8 Million by the year 2026. More

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Global Induced Pluripotent Stem Cell (iPSC) Market to Reach $2.3 Billion by 2026 - PRNewswire

Impact of NK cell-based therapeutics for Lung Cancer Therapy | BTT – Dove Medical Press


Lymphoid non-T cells that can kill virally infected and tumor cells were described more than four decades ago and termed natural killer (NK) cells.1 NK cells can attack tumor cells without priming and their activity depends on a range of stimulatory and inhibitory receptors.2,3 NK cells comprise about 515% of the human peripheral blood mononuclear cells (PBMCs) and are part of the native immune system that screen cell membranes of autologous cells for a reduced expression of MHC class I molecules and increased expression of cell stress markers.4,5 NK cells mediate the direct and rapid killing of freshly isolated human cancer cells from hematopoietic and solid tumors.6,7 (Figure 1) NK cells in human peripheral blood, bone marrow and various tissues are characterized by the absence of T cell receptors (TCR) and the corresponding CD3 molecules as well as by the expression of neural cell adhesion molecule (NCAM/CD56).8 Human NK cells are generated from multilineage CD34+ hematopoietic progenitors in the bone marrow and their maturation occurs at this site of origin as well as in the lymphoid organs but not in thymus.9 In blood, NK cells show a turnover time of approximately 2 weeks with a doubling within 13.5 days in vivo and in vitro cytokine stimulation of peripheral blood NK cells can result in expansion with a median of 16 (range 1130) population doublings.10

Figure 1 NK cells and other immune cells in the tumor microenvironment. NK cells of the CD56dim CD16+ phenotype secrete interferon- (IFN-), which increases the expression of MHC class I of tumor cells, enhancing the presentation of tumor antigens to T cells. Inhibitory checkpoint molecules expressed by NK cells can be blocked using specific monoclonal antibodies (ICIs). NK cells of the CD56bright CD16- phenotype recruit dendritic cells (DCs) to the tumor microenvironment (TME) and drive their maturation via chemokine ligands CCL5, XCL1 and FMS-related tyrosine kinase 3 ligand (FLT3L). DCs in turn stimulate NK and T cells via membrane-bound IL-15 (mbIL-15) and 41BBL secretion. Eventually, NK cells lyse tumor cells resulting in release of cancer antigens, which are then presented by DCs, to provoke specific T cell activation in relation with MHC class I molecules. The immunotherapeutic effect of NK cells includes the removal of immunosuppressive MDSCs.

NK cells are not only present in peripheral blood, lymph nodes, spleen, and bone marrow but they can also migrate to sites of inflammation in response to distinct chemoattractants. The majority of CD56dim subpopulation of the whole NK cells in peripheral blood (approximately 90%) exhibits high expression of the Fc receptor FcRIII (CD16), killer cell immunoglobulin-like receptors (KIRs) and perforin-mediated cytotoxicity whereas a minor population of CD56bright CD16- KIR- CD94/NKG2A+ (approximately 515%) of NK cells is primarily producing cytokines, including IFN- and TNF-1113 These two NK cell populations have been termed conventional NK cells in contrast to distinct tissue-resident NK cell populations localizing to liver, lymphoid tissue, bone, lung, kidney, gut and uterine tissue as well as distinct adaptive NK cell populations.14 However, CD56 and CD16 are not specific for NK cells and, furthermore, the heterogeneous tissue-resident populations show expression of adhesion molecules and CD69 and may represent an immature NK cell type. Adaptive NK cells are observed in connection with viral infections and exhibit memory cell-like properties. Overall, a wide diversity of receptor expressions of NK cells has been observed and, so far, the function of many of these subpopulations has not been fully characterized.

NK cells can eliminate target cells controlled by signals derived from activating (eg, NCRs or NKG2D) and inhibitory receptors (eg, KIRS or NKG2A).1517 Normal host cells are protected from NK cells attacks through inhibitory KIRs, that identify the self-MHC class I molecules.15 In particular, the germline-encoded NK receptors include the activating receptors NKG2D, DNAM-1, the natural killing receptors NKp30, NKp44, NKp46, and NKp80, the SLAM-family (Signaling Lymphocyte Activating Molecule) receptors for the elimination of hematopoietic tumor cells and the inhibitory KIRs.18 The activating signaling molecules promote tumor cell killing, cytokine production, immune cell activation, and proliferation and the NKpXX receptors, when engaged, all trigger alterations of the cellular calcium flux and NK cell-mediated killing and secretion of IFN- (Figure 1).

The interaction between KIRs and self-MHC molecules governs the maturation of NK cell, a process termed licensing.11,19,20 As alternative of MHC downregulation, cancer cells may be recognized by the overexpression of binding molecules for activating NK cell receptors. Ligands for the activating NKG2D receptor, such as MHC class I polypeptide-related sequence A (MICA), MICB and others are presented by cancer cells preferentially in response to cellular stress.21 A separate mechanism known as antibody-dependent cell cytotoxicity (ADCC) results in elimination of antibody-coated cell via the CD16 FcRIII receptor.22

NK cell-mediated lysis of target cells is mainly achieved through the release of the cytotoxic effector perforin and granzymes A and B but NK cells also produce a range of cytokines, both proinflammatory and immunosuppressive, such as IFN-, TNF- and IL10, respectively, as well as growth factors such as granulocyte macrophage colony-stimulating factor (GM-CSF), granulocyte colony-stimulating factor (G-CSF) and IL-3 (Figure 1). CD56dim NK cells can produce very rapidly IFN- within 2 to 4 hours after triggering through NKp46 and NKp30 activating receptors (ARs).12,13 NK cellderived cytokine production impacts dendritic cells, macrophages and neutrophils and empower NK cells to regulate subsequent antigen-specific T and B cell responses. Activated NK cells lose CD16 (FcRIII) and CD62 ligand through the disintegrin and metalloprotease 17 (ADAM17), and inhibition of this protease enhances CD16-mediated NK cell function. Cytokine stimulation also downregulates CD16 and upregulates CD56 expression. Moreover, certain cytokines can greatly enhance the cytotoxicity and cytokine production of the CD162 CD56bright and CD161 CD56dim NK cell subsets, respectively.23,24

In cancer patients, NK cells target cells low/deficient of MHC-class I or bearing altered-self stress-inducible proteins.17,25 Besides tumor cell killing through release of perforin and granzyme and secretion of immunoregulatory mediators such as nitric oxide (NO) effects cell death mediated by TNF-family members such as Fas-L or TRAIL. The degree of tumor infiltration of NK cells seems to have prognostic value in gastric carcinoma, colorectal carcinoma and lung carcinomas, thus indicating a protective role of the NK cell infiltrate.26,27 NK cell infiltration of tumors depends on their expression of heparinase.28 NK cells may further attract T cells to the tumor region and elevate inflammatory responses through secretion of cytokines and chemokines.29 Furthermore, NK cells have been suggested to suppress metastasis through elimination of circulating tumor cells (CTCs).30

NK cells seem well suited for anticancer immunotherapy and cells for clinical administration can be isolated from peripheral or umbilical cord blood. Peripheral blood NK cells are prepared by leukapheresis and further enriched by density gradient centrifugation (Figure 2). Subsequently, the combination of T cell depletion with CD56 cell enrichment yields highly purified NK cell populations.31 NK cells gained from peripheral blood of healthy persons are typically in a resting state and can be activated by exposure to IL-2. However, supplementation with IL-2 and infusion to cancer patients has resulted in severe side effects, such as vascular leak syndrome and liver toxicity.32 Studies with native autologous NK cells have yielded disappointing results. The most efficient NK cell expansion was observed with K562 NK target cells co-expressing membrane-bound IL-15 (mbIL-15) and 41BBL.31 This technique yields enough NK to provide cells for at least four infusions at 50 million cells/per kg from one leukapheresis product observing GMP conditions.31 However, many mechanisms mediate NK cell suppression in the tumor microenvironment (TME), several of which also impair T cell responses.33,34 In case of NK cells, NKG2D ligand release can occur by shedding and these soluble ligands prevent NK cell-tumor cell interaction and the cytotoxic response.35,36

Figure 2 Isolation, activation and propagation of allogeneic NK cells. Peripheral blood mononuclear cells (PBMCs) are prepared from healthy donors by leukapheresis. PBMC depletion of CD3+ T cells, prevents GvHD after infusion and further purification is achieved by positive CD56+ cell selection. These cell preparations are infused or activated with IL-2 or a mixture of IL-12, IL-15 and IL-18. Another method for NK cell stimulation involves ex vivo coculture with the K562 cell line expressing membrane-bound IL-15 (mbIL-15) and 41BBL that is irradiated to abolish expansion. Umbilical cord blood NK cells can be used similar to peripheral blood NK cells or enriched for CD34+ hematopoietic progenitors, followed by differentiation to NK cells. NK cells can be gained from induced pluripotent stem cells (iPSCs) via successive hematopoietic and NK cell differentiation, followed by stimulation with cells expressing mbIL-21. Before infusion of allogeneic NK cells, patients receive lymphodepleting chemotherapy to facilitate temporary engraftment of the infused NK cells.

In summary, NK cells are functional in tumor surveillance and can be manipulated by artificial activation techniques to present a highly effective anticancer tool against hematopoietic malignancies and, dependent on successful further rearming and mobilization, against solid tumors in the future.

The lungs are frequently challenged by pathogens, environmental damages and tumors and contain a large population of innate immune cells.37,38 Involvement of NK cells in lung diseases, such as cancer, chronic obstructive pulmonary disease (COPD), asthma and infections, has been amply reported.39 Chronic inflammation drives the irreversible obstruction of the lung function in COPD and local NK cells show hyperresponsiveness in COPD and kill autologous lung CD326+ epithelial cells.40 Therefore, targeting NK cells may represent a novel strategy for treating COPD. Furthermore, NK cells from cigarette smoke-exposed mice produce higher levels of IFN- upon stimulation with cytokines or toll-like receptor (TLR) ligands.41

Lung NK cells account for approximately 1020% of local lymphocytes and have migrated to the lungs from bone marrow.42 These cells exhibit the phenotype of the CD56dim CD16+ subset and are located in the parenchyma.43 Lung NK cells show major differences in phenotype and function to those from other tissues and, for example, KIR-positive NK cells and differentiated CD57+ NKG2A cells are found in higher numbers in the lungs compared to matched peripheral blood.37,38 In vivo, human lung NK cells respond poorly to activation by target cells in comparison to peripheral blood NK cells, most likely due to suppressive effects of alveolar macrophages and soluble factors in the fluid of the lower respiratory tract.44 The presence of hypofunctional NK cells seems to regulate the pulmonary homeostasis in the presence of constantly irritation by environmental and autologous antigens.

Unlike other tissues, the lung NK cell diversity and its acquisition have been very little studied, especially regarding the resident lung populations. Although the majority of lung NK cells are of a non-tissue-resident phenotype, a small CD56bright CD49a+ lung NK cell subset has been found.45 NK cell diversity occurs for the main resident population within the lung, namely CD49a+CD56bright CD16 NK cells that can be split into four different resident subpopulations according to the residency markers CD69 and CD103.47 The CD69+CD103+ subset is the most important as compared to single positive or double negative subsets. The respective significance of these subsets in terms of ontogeny, differentiation, or functionality remains to be characterized.

The CD16 NK cells in the human lung comprises a heterogeneous cell population and the CD69+CD49a+CD103 and CD69+CD49a+CD103+ tissue-resident NK cells are clearly distinct from other NK cell subsets in the lung and other tissues, whereas CD69spCD16 NK cells (lacking expression of CD49a and/or CD103) largely represent conventional CD69CD16 NK cells.47 Furthermore, lung tissue-resident NK cells are functionally competent and constitute a first line of defense in the human lung. Protein and gene expression signatures of CD16 NK cell subsets correlated with distinct patterns of expression of CD69, CD49a, and CD103 and corroborated the CD69+CD49a+CD103 and CD69+CD49a+CD103+ NK cells as tissue-resident NK cells.48 In contrast, CD69spCD16 NK cells are more similar to CD69CD16 NK cells and showed lower expression of genes associated with tissue-residency.

On the course of NK cell differentiation less differentiated NK cells are hypofunctional but respond stronger to cytokine stimulation and more differentiated NK cells exert more potent ADCC-dependent cell killing.46,49 The early activation antigen CD69 is expressed on a wide range of tissue-resident lymphocytes, including T cells and NK cells, and promotes retention of the cells in the tissue.38,50 Highly differentiated and hypofunctional CD69+ CD56dim CD161+ NK cells constitute the dominant NK cell population in the human lung. In summary, these results indicate that the human lung is mainly populated by NK cells migrating between lung and blood, rather than by CD69-positive tissue-resident cells. The mechanisms controlling this distribution of the lymphocyte populations is not known but may comprise changes in the homing of NK cells, increased apoptosis of NK cells and increased expansion or recruitment of tissue-resident T cells.

Although the incidence of lung cancer is declining, the survival rates remain poor due to a lack of early detection and only recent progress in targeted cancer therapies that are still only feasible for a limited subpopulation of patients.51,52 The host of immune cells involved in lung cancer include CD4+ and CD8+ T lymphocytes, neutrophils, monocytes, macrophages, innate lymphoid cells (ILCs), dendritic cells and NK cells. In lung cancer patients, peripheral NK cell cytotoxicity and INF- production was reported to be reduced.5356 Especially, a lower cytotoxic activity in NK cells was observed in smokers due to the suppression of the induction of IL-15 and IL-15-mediated NK cell functions in human PBMCs.57 Furthermore, the granzyme B release by NK cells from lung cancer tissue is lower compared to adjacent normal tissue.58 Additionally, peripheral NK cells of NSCLC patients are present in lower cell numbers and display a distinctive receptor expression with downregulation of NKp30, NKp80, CD16, DNAM1, KIR2DL1, and KIR2DL2, but upregulation of NKp44, NKG2A, CD69, and HLA-DR. Furthermore, low levels of IFN- and CD107a result in impaired cytotoxicity and promotion of tumor growth.54,59,60 The CD56bright CD16-NK cell subset is highly enriched in the tumor infiltrate and show activation markers, including NKp44, CD69, and HLA-DR.5961 However, the release of soluble factors by NSCLC tumor cells inhibit the activity of granzyme B and perforin and the induction of IFN- in intratumoral NK cells and suggest a local inhibition of NK cells by the NSCLC TME.62 T cell immune checkpoint molecules programmed cell death 1 (PD-1), cytotoxic T lymphocyte antigen 4 (CTLA4), lymphocyte activation gene 3 protein (LAG3) and TIM3 are expressed by subpopulations of NK cells and might reduce NK antitumor responses. In solid tumors, vascular supply may be ineffective causing hypoxia and low nutrient levels in the TME that may impair NK cell metabolism and antitumor cytotoxicity as demonstrated in lung experimental animal models.63,64 Additionally, the CD56bright CD16- NK cells enhance protumor neoangiogenesis through secretion of VEGF, placental growth factor and IL-8/CXCL8.65

Small cell lung cancer (SCLC) is a pulmonary neuroendocrine cancer linked to smoking that has a dismal prognosis and invariably develops resistance to chemotherapy within a short time.66 Despite a high tumor mutational burden, immune checkpoint inhibitors show minor prolongation of survival in SCLC patients.66,67 In particular, Nivolumab (anti-PD1 antibody) was approved for third-line treatment and the combination of atezolizumab (anti-PDL1 antibody) with carboplatin and etoposide was approved for first-line treatment of disseminated SCLC, resulting in minor survival gains.68,69 NK cells are critical in suppressing lung tumor growth and while low MHC expression would make SCLC resistant to adaptive immunity, this should make SCLCs susceptible to NK cell killing.64,70 In comparison to the peripheral blood NK cells of healthy individuals, the NK cells of SCLC patients are present in equal cell counts but exhibit lower cytotoxic activity, downregulation of NKp46 and perforin expression.55 Lack of effective NK surveillance seems to contribute to SCLC progress, primarily through the reduction of NK-activating ligands (NKG2DL). SCLC primary tumors possess very low levels of NKG2DL mRNA and SCLC lines largely fail to express NKG2DL at the protein level.66,71 Accordingly, restoring NKG2DL in experimental models suppressed tumor growth and metastasis in a NK cell-dependent manner. Furthermore, histone deacetylase (HDAC) inhibitors induced NKG2DL re-expression and resulted in tumor suppression by NK and T cells. Actually, SCLC and neuroblastoma are the two tumor types with lowest NKG2DL-expression. In conclusion, epigenetic silencing of NKG2DL results in a defect of NK cell activation and immune escape of SCLC and neuroblastoma. Poor immune infiltrates in SCLC tumors combined with reduced NK and T cell recognition of the tumor cells seem to contribute to immune resistance of SCLCs.72

A majority of NSCLC patients do not benefit from the current IC-directed immunotherapy. CD56dim CD16+ NK cells comprise the majority of NK cells in human lungs and express KIRs and a more differentiated phenotype compared with NK cells in the peripheral blood.38,73 However, human lung NK cells were hyporesponsive toward target cell stimulation, irrespective of priming with IFN-. NK cells are activated by MICA and MICB expressed by stressed tumor cells and are recognized by NK cell receptors NKG2D.74 Preclinical studies show that NKG2A or TIGIT blockade enhances antitumor immunity mediated by NK cells.2 However, the poor infiltration of NK cells into solid tumors, alterations in activating/inhibitory signals and adverse TME conditions decrease the NK-mediated killing. NK cells can be inactivated by different cells such as Tregs and MDSCs but also by soluble mediators such as adenosine.75,76 Adenosine represents one of the most potent immunosuppressive factors in solid tumors that is produced in the tumor stroma by degradation of extracellular ATP.7779 ATP and ADP are degraded by membrane-expressed ectonucleotidases such as CD39 and enhance the influx and the suppressive capacity of Tregs and MDSCs in solid tumors. NK cells are strongly involved in eliminating circulating tumor cells (CTCs), but their activity can be inhibited by soluble factors, such as TGF- derived from M2 macrophages.80,81 One approach uses cytokines to selectively boost both the number as well as the efficacy of anti-tumor functions of peripheral NK cells.82 The gene signature of NK cell dysfunction in human NSCLC revealed an altered migratory behavior with downregulation of the sphingosine-1-phosphate receptor 1 (S1PR1) and CX3C chemokine receptor 1 (CX3CR1).83 Additionally, the expression of the immune inhibitory molecules CTLA-4 and killer cell lectin like receptor (KLRC1) were elevated in intratumoral NK cells and CTLA-4 blockade could partially restore the impaired MHC class II expression on dendritic cell (DC). In summary, the intratumoral NK dysfunction can be attributed to direct crosstalk between tumor and NK cells, activated platelets and soluble factors, such as TGF-, prostaglandin E2, indoleamine-2,3-dioxygenase, adenosine and IL-10.19,26,54,83 In addition, a specific migratory signature could explain the exclusion of NK cells from the tumor interior. NK cells in NSCLC distribute to the intratumoral fibrous septa and to the borders between tumor cells and surrounding stroma.54,59 It has been suggested that a barrier of extracellular matrix proteins may be responsible for the restriction of NK cells primarily to the tumor stroma, such preventing direct NK celltumor cell interactions.84,85 In contradiction, ultrastructural investigations demonstrated NK cells are rather flexible and capable of extravasation and intratumoral migration.59 CD56bright CD162+ NK cells express CCR5 that is known to mediate the chemoattraction of specific leukocyte subtypes and explain their accumulation in tumor tissues.13 Infiltration of the tumors by NK cells was reported to be linked with a favorable prognosis in lung cancer.26,86 However, Platonova et al reported that NK cell infiltration lacks any correlation with clinical outcomes in NSCLC.47,54 The poor prognostic significance of NK cells in NSCLC seems to be associated with the intratumoral NK cell dysfunction in patients with intermediate or advanced-stage tumors.

It would be of great importance to target chemokine receptors on NK cells to enable them to enter tumor tissues. NK cells acquire inhibitory functions within the TME, the reversion of which will enable NK cells to activate other immune cells and exert antitumor cytotoxic functions.87 In addition, several clinical trials based on NK cell checkpoints are ongoing, targeting KIR, TIGIT, lymphocyte-activation gene 3, TIM3 and KLRC1.88 NK cell dysfunction favors tumor progress and restoring NK cell functions would represent an important potential strategy to inhibit lung cancer. These approaches include the activation of NK cells by exposing to interleukins such as IL-2, IL-12, IL-15, IL-18, the blockade of inhibitory receptors of NK cells by targeting NKG2A, KIR2DL1 and KIR2DL2 as well as the enhancement of NK cell glycolysis by inhibition of fructose-1,6-bisphosphatase 1 and altering the immunosuppressive TME by neutralization of TGF-.37,53 Pilot clinical trials of NK cell-based therapies such as administration of cytokines, NK-92 cell lines and allogenic NK cell immunotherapy showed promising outcomes on the lung cancer survival with less adverse effects. However, due to the lack of larger clinical trials, the NK cell targeting strategy has not been approved for lung cancer treatment so far.

Most of studies regarding NK cell-based immunotherapy have been performed in hematologic malignancies. However, there are increasingly data available that show that NK cells can selectively recognize and kill cancer stem cells in solid tumors.89 Furthermore, Kim et al showed the essential role of NK cells in prevention of lung metastasis.90 Additionally, Zhang et al studied the efficacy of adaptive transfer of NK and cytotoxic T-lymphocytes mixed effector cells in NSCLC patients.91 A prolonged overall survival was detectable in patients after administration of NK cell-based immunotherapy. In a trial of Lin et al, the clinical outcomes of cryosurgery combined with allogenic NK cell immunotherapy for the treatment of advanced NSCLC were improved with elevated immune functions and quality of life.92

The efficacy of NK cell-based adoptive immunotherapy was also investigated in SCLC patients. Ding et al studied the efficacy and safety of cellular immunotherapy with autologous NK, T cells and cytokine-induced killer cells as maintenance therapy for 29 SCLC patients and demonstrated an increased survival of the patients.93 Importantly, lung cancer-infiltrating NK cells can mainly function as producers of relevant cytokines, either beneficial or detrimental for the antitumor immune response, and activation can transform CD56bright CD162+ KIR2+ NK cells into CD56dim CD161+ KIR1+ NK cells with higher cytotoxic activity.94 The switch from a CD56bright phenotype to a CD56dim NK cell signature can take place in lymph nodes during inflammation and these cells circulate into peripheral blood as KIR+CD16+ NK cells with low cytotoxic ability. However, the secondary lymphoid organ (SLO) NK cells acquire cytotoxic activity upon stimulation with IL-2. Malignant NSCLC tumor areas show high presence of Tregs and minor NK cell infiltration, whereas non-malignant regions were oppositely populated, containing NK cells with marked cytotoxicity ex vivo.95 IL-2 activation of PMBCs exhibit increased cytotoxic activity against primary lung cancer cells, that is further elevated by IL-12 treatment.96 The adoptive transfer of NK cells is a therapeutic strategy currently being investigated in various cancer types. For example, Krause et al treated a NSCLC patient and 11 colorectal cancer patients with autologous transfer of NK cells activated ex vivo by a peptide derived from heat shock protein 70 (Hsp70) plus low-dose IL-2.97 The NK cell reinfusion revealed minor adverse effects and yielded promising immunological alterations.

Adaptive-like CD56dim CD16+ NK cells that were found in studies in mice and humans in peripheral blood have a distinctive phenotypic and functional profile compared to conventional NK cells.31,98 These cells have a high target cell responsiveness, as well as a longer life time and a recall potential comparable to that of memory T cells.99 Whereas adoptive NK cell transfer showed promising activities in the treatment of hematological malignancies, elimination of solid tumor cells failed due to insufficient migration and tumor infiltration.100 Furthermore, a CD49a+ KIR+ NKG2C+ CD56bright CD16 adaptive NK cell population with features of residency exists in human lung, that is distinct from adaptive-like CD56dim CD16+ peripheral blood NK cells.43 NK cells with an adaptive-like CD49a+ NK cell expansion in the lung proved to be hyperresponsive toward cancer cells. Despite their in vivo priming, the presence of adaptive-like CD49a+ NK cells in the lung did not correlate with any clinical parameters.

At the time of diagnosis, the majority (80%) of lung cancer patients present with locally advanced or metastatic disease that continues to progress despite chemotherapy.101 Lung cancer remains the leading cause of cancer death worldwide despite the responses found for immune checkpoint inhibitors (ICIs), including programmed death receptor-1 (PD1) or PD ligand 1 (PDL1)-blockade therapy.102 These ICIs has achieved marked tumor regression in some patients with advanced PD1/PDL1-positive lung cancer; however, lasting responses were limited to a 15% subpopulation of patients.103 IFN-, released by cytotoxic NK and T cells, is a critical enhancer of PDL1 expression on tumors and a predictor of response to immunotherapies.104 The high failure rate of immunotherapy seems to be a consequence of low tumor PDL1 expression and the action of further immunosuppressive mechanisms in the TME.105

NK cells expanded from induced-pluripotent stem cells (iPSCs) increased PDL1 expression of tumor cell lines, sensitized non-responding tumors from patients with lung cancer to PD1-targeted immunotherapy and killed PDL1- patient tumors (Figure 2).102 In contrast, native NK cells, that are susceptible to immunosuppression in the TME, had no effect on tumor PDL1 expression. Accordingly, only combined treatment of expanded NK cells and PD1-directed inhibitors resulted in synergistic tumor cell kill of initially non-responding patient tumors. A randomized control trial in patients with PDL1+ NSCLC found that the combination treatment of NK cells with the PD1 inhibitor pembrolizumab was well-tolerated and improved overall and progression-free survival in patients compared single agent pembrolizumab treatment.106 Importantly, during this clinical study no adverse events associated with the administration of NK cells were detected.

Early trials of autologous NK cell therapy from leukapheresis have demonstrated potency against several metastatic cancers but patients developed vascular leak syndrome due to a high level of IL-2.32,107 In contrast, other studies reported that these autologous NK cells failed to demonstrate clinical responses or efficacy at large.108,109 Adoptive transfer of ex vivo IL-2 activated NK cells showing better outcomes than the systemic administration of IL-2.107,110 The development of novel NK cell-mediated immunotherapies presumes a rich source of suitable NK cells for adoptive transfer and an enhancement of the NK cell cytotoxicity and durability in vivo. Potential sources comprise haploidentical NK cells, umbilical cord blood NK cells, stem cell-derived NK cells, permanent NK cell lines, adaptive NK cells, cytokine-induced memory-like NK cells and chimeric antigen receptor (CAR) NK cells (Figure 2). Augmentation of the cytotoxicity and persistence of NK cells under clinical investigation is promoted by cytokine-based agents, NK cell engager molecules and ICIs.111,112 Despite some successes, most patients failed to respond to unmodified NK cell-based immunotherapy.113

Clonal NK cell lines, such as NK-92, KHYG-1 and YT cells, are an alternative source of allogeneic NK cells, and the NK-92 cell line has been extensively tested in clinical trials.114116 NK-92 cells are easily expanded with doubling times between 24 and 36 hours.115 NK-92 has received FDA approval for trials in patients with solid tumors.116 These cells are genetically unstable, which requires them to be irradiated prior to infusion. Irradiated NK-92 cells have been observed to kill tumor cells in patients with cancer, although irradiation limits the in vivo persistence of these cells to a maximum of 48 hours.117 The results are still short of a significant clinical benefit.118 An NK-92- derived product (haNK) has been engineered to express a high-affinity variant of CD16 as well as endogenous IL-2 in order to enhance effector function (Figure 2).119121 For example, Dinutuximab is a product of human-mouse chimeric mAb (ch14.18 mAb), which has demonstrated high efficacy against GD2-positive neuroblastoma cells in vitro and melanoma cells in vivo.122 In MHC-I expressing tumor cells, the effector functions of autologous NK cells are often inhibited by KIR that can be blocked with the help of anti-KIR (IPH2101).123 Stem cell-derived NK cell products from multiple sources are currently being tested clinically, including those originating from umbilical cord blood stem cells or iPSCs.124,125 NK cells account for ~515% of all lymphocytes in peripheral blood, whereas they constitute up to 30% of the lymphocytes in umbilical cord blood.126 iPSC-derived NK cells were triple gene- modified to express cleavage-resistant CD16, a chimeric antigen receptor (CAR) targeting CD19 and a membrane-bound IL-15 receptor signaling complex in order to promote their persistence.127 Thus, investigations to provide highly active modified NK cells in numbers sufficient for clinical application are actively pursued.

CAR T cells are derived from autologous T cells and genetically engineered to express an antibody single-chain variable fragment (scFv) targeting a tumor-associated antigen.128 CAR T cell therapies achieved objective response rates of >80% in patients with acute lymphocytic leukemia (ALL) and B cell non-Hodgkin lymphoma.129131 However, the drawbacks of CAR T therapy include severe adverse events such as GvHD,cytokine-release syndrome and neurological toxicities, besides inefficiencies of T cell isolation, modification and expansion as well as exorbitant costs.132 CAR NK therapy is expected to circumvent some of these problems, including the high toxicities. Primary NK cells are not ideal sources for the generation of CAR cell products, due to difficulties in cell isolation, transduction and expansion. However, NK cell expansion could be greatly improved by involvement of a K562 leukemia cell line feeder modified to express membrane-bound IL-15 (mbIL-15; Figure 2).133 Denman et al improved this method adding membrane-bound 41BBL to the K562 cell line resulting in a high expansion of NK cells within a short time.134,135 Nevertheless, current clinical trials of CAR NK cells rely mainly on processing of stem cell-derived or progenitor NK cells.136 Genetic engineering of NK cells has been performed by viral transduction or electroporation of mRNA.3 Many clinical trials of CAR NK-92 cells are ongoing, but the requirement for irradiation and resulting short persistence are limitations to the clinical efficacy of these products. NK92-CD16 cells preferentially killed tyrosine kinase inhibitor (TKI)-resistant NSCLC cells when compared with their parental NSCLC cells.137 Moreover, NK92-CD16 cell-induced cytotoxicity against TKI-resistant NSCLC cells was increased in the presence of cetuximab, an EGFR-targeting monoclonal antibody. A number of Phase I trials of CAR NK cells from various sources, including autologous peripheral blood NK cells, umbilical cord blood NK cells, NK-92 cells and iPSCs were designed to target diverse cancers, such as ALL, B cell malignancies, NSCLC, ovarian cancer or glioblastoma, and are currently active.

CAR NK cells derived from iPSCs, such as the triple-gene-modified constructions are described as a promising alternative. For example, a tri-specific killer engager (TriKE) consists of two scFvs, one targeting CD16 on NK cells and the other targeting CD33 on AML cells, linked by an IL-15 domain that promotes NK cell survival and proliferation.138 Controlled clinical trials with larger patient cohorts are required to validate these early results. Immunosuppressive factors of the TME, such as low glucose, hypoxia and MDSCs, Treg cells and tumor associated macrophages (TAMs) still suppress the antitumor functions of CAR-NK cells. Low efficiency of CAR-transduction, limited cell expansion and the scarcity of suitable targets impede the use of CAR-NK therapy despite of reports of therapeutic efficacy and safety.139

The cytokine gene transfer approaches, including interleukins and stem cell factor (SCF), have been shown to induce NK cell proliferation and increases survival capacity in vivo.140 The use of primary CAR-NK and CAR-NK lines in hematological tumors showed high specificity and cytotoxicity toward the target cells.141,142 So far, only a few clinical trial studies of CAR-NK have been registered on The combination of blocking ICIs on CAR-NK cells can lead to a highly efficient cancer-redirected cytotoxic activity.144,145 However, hematological cancers are responsible for only 6% of all cancer deaths and solid tumor are much more difficult to target by NK/CAR NK-based immunotherapy.146

Both the unmodified and the engineered forms of NK cell treatment are showing promise in pilot clinical trials in patients with cancer.147 This kind of immunotherapy seems to combine efficacy, safety, and relative ease of effector cell supply. The lung is populated by NK cells at a specific differentiation stage releasing cytokines but exhibiting low cytotoxicity. Poor tumor infiltration, immunosuppressive factors and cell types as well as hypoxic conditions in the TME limit the activity of NK cells. Therefore, larger numbers of activated, cytotoxic competent and armed NK cells will be required for successful therapy.

We wish to thank B. Rath for help in the preparation of the manuscript and T. Hohenheim for enduring endorsement.

The authors report no conflicts of interest in this work.

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Impact of NK cell-based therapeutics for Lung Cancer Therapy | BTT - Dove Medical Press

Caribou eyes $100M IPO as it aims off-the-shelf CAR-Ts at the clinic – FierceBiotech

Another day, another $100 million. In a move thats starting to look like a rite of passage in biotech, Caribou Biosciences filed on Thursday to raise $100 millionin its Wall Street debut. The proceeds will propel three off-the-shelf CAR-T therapies into and through the clinic and boost Caribous work in natural killer (NK) cell therapies.

Caribou is developing all three programs for patients with blood cancers whose disease has come back despite undergoing other treatments or did not respond to those treatments in the first place.

The company's most advanced program, CB-010, is an anti-CD19 CAR-T thats in a phase 1 trial in B-cell non-Hodgkin lymphoma. Some of the IPO proceeds will support this trial through initial data, which are expected in 2022, according to a securities filing.

RELATED:Caribou nets $115M to boost CRISPR tech, advance off-the-shelf cell therapies

The funds will also bankroll IND-enabling activities for two other programs: CB-011, a BCMA-targeting CAR-T in development for the treatment of multiple myeloma and CB-012, a CAR-T targeting CD371 for the treatment of acute myeloid leukemia. The company hopes to start human trials for these programs in 2022 and 2023, respectively.

All three programs are allogeneic CAR-T treatments, meaning they are made from donor cells, rather than a patients own cells like the four approved CAR-T therapies from Novartis, Gileads Kite unit and Bristol Myers Squibb.

Those types of treatments, called autologous, can be complex and time-consuming to make: cells must be taken out of the patient, modified to fight cancer and then put back into the patient. Some patients dont have enough T cells, or T cells of good enough quality, to make those treatments. Others simply dont have much time.

RELATED: Blackstone, Cellex and Intellia form $250M CAR-T startup

Though Caribous CAR-T programs all target blood cancer, the company is working on allogeneic NK cell therapies based on induced pluripotent stem cells for solid tumors. Some of the IPO haul will support R&D in this area, as well as the development of the CRISPR technology it uses to make its cell therapies.

In recent years, the cell therapy space has been teeming with new entrants looking to break the barriers seen in the first generation of cell therapies. In 2018, a pair of former Kite Pharma executives unveiled Allogene, a biotech that started out with $300 million and 17 off-the-shelf CAR-T assets licensed from Pfizer.

France-based Mnemo Therapeutics is trying to make CAR-T work for solid tumors by identifying better targets. Other companies, like Catamaran Bio, are going after that same piece of the pie, but via NK cell treatments instead.

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Caribou eyes $100M IPO as it aims off-the-shelf CAR-Ts at the clinic - FierceBiotech

Genexine, Toolgen to co-develop CAR-NK cell gene therapy – Korea Biomedical Review

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Genexine said Monday that it signed an agreement with Toolgen to co-develop and commercialize CAR-NK cell gene therapy using the latters CRISPR/Cas9 technology.

The two companies will co-own patent rights, utility model rights, trademark rights, and R&D data resulting from their co-development at a 5:5 equity ratio. They will also equally shoulder the cost incurred for the patent application, revision, registrations, and maintenance.

Genexine will make the most of Toolgens genetic scissors technology to develop new cell gene therapy to cure incurable diseases and expand its strategic pipelines.

CAR-NK cell gene therapy is an anticancer drug -- homogeneous natural killer (NK) cells whose immunity efficacy is strengthened through genetic manipulation administered to patients.

Unlike the CAR-T cell treatment that has to utilize the patients own T cell, the production of CAR-NK therapy is much cheaper, and mass production is also possible because NK cells could be abstracted from ready-made cell strain or induced pluripotent stem cells (IPSC). NK cells also can attack a wide variety of cancer cells, aside from targets introduced by CAR technology, as they have perception ability and offensive power.

Toolgen has confirmed that it could improve anticancer and immunity capacity through gene-editing of not only CAR-T, TCR-T but CAR-NK and various other anticancer immunocytes.

Genexine will make the best use of Toolgens CRISPR/Cas9 technology to develop new drugs of gene therapy to cure incurable diseases. This co-development MOU will be its start, Genexine CEO Sung Young-chul said. NK cell gene therapy, which is rapidly emerging as the next-generation anticancer immunotherapy, has cost advantages. By developing new drugs through cooperation with Toolgen, we will bring about a paradigm change on the anticancer treatment market.

Toolgen Kim Young-ho also said, Toolgen had put in a lot of effort to apply gene-editing technology to cell therapies, such as CAR-T and CAR-NK, and has recently produced successful results.

Kim added that if the two companies develop global blockbuster cell and gene therapies using Genexines know-how and Toolglens genetic scissors technology, it will maximize their corporate values.

Genexine, Toolgen to co-develop CAR-NK cell gene therapy - Korea Biomedical Review

Reversal of biological age detected in mouse and human embryos – BioNews

5 July 2021

Germline cells seem to reset their biological clocks around the time of embryoimplantation, not when generating gametes, as previously thought.

Scientists measured an increase in genetic damage in embryonic cells during the early stages of embryogenesis in micebefore undergoing a total reset within a 'rejuvenation period', reversing any cell damage.

'This study uncovers a natural rejuvenation event during embryogenesis and suggests that the minimal biological age (ground zero) marks the beginning of organismal ageing,' wrote the researchers from Harvard Medical School and Brigham and Women's Hospital in Boston, Massachusetts.

Previously, it was thought that, unlike thesomatic cells which form our bodies, germline cells which differentiateinto either sperm or eggs were ageless and did not inherit genetic damage from their parent organisms. However, recent research has shown that germline cells do age and display hallmarks of genetic damage. Yet, babies do not inherit their parents' age, and start again from zero.

The team employed machine-learning algorithms as 'ageing clocks' to calculate the ages of human and mouse embryonic tissue by measuring the prevalence ofmethylation an epigenetic marker. These markers accumulate with age on certain sections of DNA and are influenced by environmental factors. Although these markers do not affect the DNA sequence, they can alter the way a gene is expressed and modify proteins produced.

Genetic data sets collected from mouse embryosduring different stages of embryonic development were analysed by these epigenetic ageing clocks. Data sets recorded from mouse embryos following fertilisation showed increased epigenetic ageing with time during the first six days of cell division. But, during its implantation within the uterus wall, the embryonic cells displayed a decrease in epigenetic damage, characteristic of a reversal in ageing.

The team were unable to perform the same experiment inhuman embryos but were able to compare methylation in human induced pluripotent stem cells and embryonic stem cell lines anddatasets detailing methylation in human fetal tissue samples and see that a similar reset appeared to have occurred.

The findings, published in the journal ScienceAdvances, have wide-reaching implications for aiding the treatment of age-related illnesses such as Alzheimer's and Parkinson's disease. These diseases feature cells with accelerated epigenetic ageing and through a greater understanding of these biological reset mechanisms, it is thought that epigenetic damage to these cells could be reversed. However, achieving this in practice may be challenging since knowledge of other causes of cellular ageing is needed.

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Reversal of biological age detected in mouse and human embryos - BioNews

Century Therapeutics Announces Closing of Initial Public Offering and Full Exercise of Underwriters’ Option to Purchase – GlobeNewswire

PHILADELPHIA, June 22, 2021 (GLOBE NEWSWIRE) -- Century Therapeutics(NASDAQ: IPSC), an innovative biotechnology company developing induced pluripotent stem cell (iPSC)-derived cell therapies in immuno-oncology, today announced the closing of its initial public offering of 12,132,500 shares of its common stock at a public offering price of $20.00 per share, which includes the full exercise by the underwriters of their option to purchase 1,582,500 additional shares of common stock. The aggregate gross proceeds from the offering, before deducting underwriting discounts and commissions and other offering expenses payable by Century, were approximately $242.7 million. All the shares of common stock were offered by Century.

J.P. Morgan, BofA Securities, SVB Leerink and Piper Sandler acted as joint book-running managers for the offering.

A registration statement relating to the shares being sold in this offering was filed with the Securities and Exchange Commission and became effective on June 17, 2021. The offering was made only by means of a prospectus. Copies of the final prospectus may be obtained from: J.P. Morgan Securities LLC, Attention: Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, by email at, or by telephone at (866) 803-9204; BofA Securities, NC1-004-03-43, 200 North College Street, 3rd Floor, Charlotte, NC 28255-0001, Attention: Prospectus Department, or by email at, 1-800-294-1322; SVB Leerink LLC, Attention: Syndicate Department, One Federal Street, 37th Floor, Boston, MA 02110, by telephone at 1-800-808-7525 ex. 6105 or by email at; and Piper Sandler & Co., Attn: Prospectus Department, 800 Nicollet Mall, J12S03, Minneapolis, Minnesota 55402, by telephone at (800) 747-3924 or by email at

This press release shall not constitute an offer to sell or the solicitation of an offer to buy these securities, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such state or other jurisdiction.

About Century Therapeutics

Century Therapeutics (NASDAQ: IPSC) is harnessing the power of adult stem cells to develop curative cell therapy products for cancer that we believe will allow us to overcome the limitations of first-generation cell therapies. Our genetically engineered, iPSC-derived iNK and iT cell products are designed to specifically target hematologic and solid tumor cancers. We believe our commitment to developing off-the-shelf cell therapies will expand patient access and provides an unparalleled opportunity to advance the course of cancer care.

Forward-Looking Statements

This press release contains forward-looking statements. Investors are cautioned not to place undue reliance on these forward-looking statements. Each forward-looking statement is subject to risks and uncertainties that could cause actual results to differ materially from those expressed or implied in such statement. Applicable risks and uncertainties include those identified under the heading Risk Factors in Centurys registration statement on Form S-1. These forward-looking statements speak only as of the date of this press release. Factors or events that could cause our actual results to differ may emerge from time to time, and it is not possible for us to predict all of them. We undertake no obligation to update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by applicable law.

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Century Therapeutics Announces Closing of Initial Public Offering and Full Exercise of Underwriters' Option to Purchase - GlobeNewswire

Univ. of Washington and Sana researchers use gene editing to prep stem cells for heart repair – GeekWire

Heart muscle regeneration researchers (left to right) Naoto Muraoka, Elaheh Karbassi, and Chuck Murry. (University of Washington Photo)

Human stem cell scientists have long dreamed of repairing damaged hearts, but have been stymied by researchshowing that the cells yield irregular heartbeats in laboratory animals. A new genetic engineering approach overcomes this barrier, according to a report at the annual meeting of the International Society for Stem Cell Research by scientists at the University of Washington and Sana Biotechnology, a Seattle-based company.

A heart attack typically kills about one billion cells, said Charles Murry, director of the Institute for Stem Cell and Regenerative Medicine at the UW, who presented the data Monday. Such massive cell death can lead to downstream effects such as heart failure, an often-debilitating condition that affects about 6.2 million people in the U.S. Using stem cells to repair the damage after a heart attack has long been a goal in his lab.

One major challenge in the field is that implanting cells into the hearts of laboratory animals can nudge the whole heart into beating rapidly, a condition called engraftment arrhythmia, said Murry, who is also a senior vice president and head of cardiometabolic cell therapy at Sana, which went public earlier this year.

This engraftment arrhythmia, where the heart races too quickly, has been one of the major hurdles weve been trying to overcome en route to clinical trials, said Murry in a press release.

In their study, Murry and his colleagues quelled engraftment arrhythmia using a genetic engineering strategy in cells implanted into pig hearts. Their next step is to see if the cells can repair heart damage in macaques if those studies work, the researchers will initiate clinical trials in people, he said.

To quell the arrhythmia, Murry and his colleagues turned to CRISPR, the Nobel Prize-winning technique to knock out genes. They knocked out three genes in stem cells encoding different ion channels, molecules embedded in the cell membrane that mediate impulses that propagate heart beats. They also added DNA for another ion channel, KCNJ2, which mediates the movement of potassium across the membrane, Its a chill out channel, Murry told GeekWire, It tells the heart cell not to be so excitable.

The engineered stem cells, derived from human embryonic stem cells, were coaxed in a petri dish to produce heart muscle cells, which were then implanted into pigs via open heart surgery or a catheter. The result was an even heartbeat the genetically altered cells did not cause engraftment arrhythmia.

The researchers landed on this strategy after years of effort, assessing which channels were present in the cells during arrhythmia, and knocking out multiple types of channels until they hit the right combination.

In their next set of experiments in macaques, We want to make sure these cells are still effective, said Murry, They look good beating in culture, so I think they are going to be OK. Moving forward, the researchers will also use induced human pluripotent stem cells, obtainable from adults and more amenable longer-term for clinical use.

In another recent study, published in Cell Systems, scientists at the Allen Institute for Cell Science took a close look at cardiac muscle cells derived from stem cells. They found that they could classify the state of the cells, such as how mature they were, by assessing both cell structure and which genes were turned on.

This paints a broader picture of our cells. If someone wants to really understand and characterize a cells state, we found that having both of these types of information can be complementary, said Kaytlyn Gerbin, a scientist at the Allen Institute for Cell Science in a statement. The findings provide a fine-tooth analysis of cell state, which may guide future experiments on cardiac muscle and other cell types.

Murrys research was conducted primarily at the UW, with financial support from Sana. In addition to its cardiac program, Sana has cell and gene therapy programs in diabetes, blood disorders, immunotherapy and other areas.

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Univ. of Washington and Sana researchers use gene editing to prep stem cells for heart repair - GeekWire

Ubiquitination is essential for recovery of cellular activities after heat shock – Science Magazine

Tailoring stress responses

When faced with environmental stress, cells respond by shutting down cellular processes such as translation and nucleocytoplasmic transport. At the same time, cells preserve cytoplasmic messenger RNAs in structures known as stress granules, and many cellular proteins are modified by the covalent addition of ubiquitin, which has long been presumed to reflect degradation of stress-damaged proteins (see the Perspective by Dormann). Maxwell et al. show that cells generate distinct patterns of ubiquitination in response to different stressors. Rather than reflecting the degradation of stress-damaged proteins, this ubiquitination primes cells to dismantle stress granules and reinitiate normal cellular activities once the stress is removed. Gwon et al. show that persistent stress granules are degraded by autophagy, whereas short-lived granules undergo a process of disassembly that is autophagy independent. The mechanism of this disassembly depends on the initiating stress.

Science, abc3593 and abf6548, this issue p. eabc3593 and p. eabf6548; see also abj2400, p. 1393

In response to many types of stress, eukaryotic cells initiate an adaptive and reversible response that includes down-regulation of key cellular activities along with sequestration of cytoplasmic mRNAs into structures called stress granules. Accompanying these stress responses is a global increase in ubiquitination that has been conventionally ascribed to the need for degradation of misfolded or damaged proteins. However, detailed characterization of how the ubiquitinome is reshaped in response to stress is lacking. Furthermore, it is unclear whether stress-dependent ubiquitination plays a more complex role in the larger stress response beyond its known protective function in targeting hazardous proteins for proteasomal degradation.

To explore the role of ubiquitination in the stress response, we used tandem ubiquitin binding entity (TUBE) proteomics to investigate changes to the ubiquitination landscape in response to five different types of stress in cultured mammalian cells, including human induced pluripotent stem cell (iPSC)derived neurons. The discovery of unanticipated patterns of ubiquitination prompted a detailed analysis of the ubiquitination pattern specifically induced by heat shock by using diGly ubiquitin remnant profiling along with tandem mass tag quantitative proteomics in combination with additional total proteome and transcriptome analyses. Insights from this newly defined heat shock ubiquitinome guided subsequent investigation of the functional importance of this posttranslational modification in the cellular response to heat shock.

Each of the five different types of stress induced a distinctive pattern of ubiquitination. The heat shock ubiquitinome in human embryonic kidney 293T cells was defined by ubiquitination of specific proteins that function within cellular activities that are down-regulated during stress (e.g., translation and nucleocytoplasmic transport), and this pattern was similar in U2OS cells, primary mouse neurons, and human iPSC-derived neurons. The heat shock ubiquitinome was also enriched in protein constituents of stress granules. Suprisingly, this stress-induced ubiquitination was dispensable for the formation of stress granules and shutdown of cellular pathways; rather, heat shockinduced ubiquitination was a prerequisite for p97/valosin-containing protein (VCP)mediated stress granule disassembly and for resumption of normal cellular activities, including nucleocytoplasmic transport and translation, upon recovery from stress. Many ubiquitination events were specific to one or another stress. For example, ubiquitination was required for disassembly of stress granules induced by heat stress but dispensable for disassembly for stress granules induced by oxidative (arsenite) stress.

Ubiquitination patterns are specific to different types of stress and indicate additional regulatory functions for stress-induced ubiquitination beyond the removal of misfolded or damaged proteins. Specifically, heat shockinduced ubiquitination primes the cell for recovery from stress by targeting specific proteins involved several pathways down-regulated during stress. Furthermore, some key stress granule constituents are ubiquitinated in response to heat stress but not arsenite stress, thus engaging a mechanism of VCP mediateddisassembly of heat shockinduced granules that is not shared by arsenite stressinduced granules. Finally, our deep proteomics datasets provide a rich community resource illuminating additional aspects of the roles of ubiquitination in response to stress.

(A) Proteomics-based ubiquitinome profiling reveals that different stresses induce distinct patterns of ubiquitin conjugation. TEV, tobacco etch virus protease cleavage site; Ub, ubiquitin; UBA, ubiquitin-associated domain; UV, ultraviolet. (B) Heat stressinduced ubiquitination targets proteins associated with cellular activities down-regulated during stress, including nucleocytoplasmic (NC) transport and translation, as well as stress granule constituents. This ubiquitination is required for the timely resumption of biological activity and stress granule disassembly after the removal of stress. mRNP, messenger ribonucleoprotein.

Eukaryotic cells respond to stress through adaptive programs that include reversible shutdown of key cellular processes, the formation of stress granules, and a global increase in ubiquitination. The primary function of this ubiquitination is thought to be for tagging damaged or misfolded proteins for degradation. Here, working in mammalian cultured cells, we found that different stresses elicited distinct ubiquitination patterns. For heat stress, ubiquitination targeted specific proteins associated with cellular activities that are down-regulated during stress, including nucleocytoplasmic transport and translation, as well as stress granule constituents. Ubiquitination was not required for the shutdown of these processes or for stress granule formation but was essential for the resumption of cellular activities and for stress granule disassembly. Thus, stress-induced ubiquitination primes the cell for recovery after heat stress.

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Ubiquitination is essential for recovery of cellular activities after heat shock - Science Magazine