Scientists at Bay Area universities, laboratories, biotechnology companies and drug manufacturers are fashioning drug concoctions out of blood plasma, chimpanzee viruses and cells taken from bone marrow in the race to rid the world of COVID-19.
The microbial treasure hunt is not just to find a cure which may not be possible but to control the debilitating health problems caused by the coronavirus.
Major progress has been made this year. The antiviral drug remdesivir, produced in Foster City, has improved recovery times, and the steroid dexamethasone has cut the number of deaths in severely ill patients.
What follows is a list of some of the most promising medications and vaccines with ties to the Bay Area:
Mesenchymal stem cells / UCSF and UC Davis Medical Center:
UCSF Dr. Michael Matthay is leading a study of whether a kind of stem cell found in bone marrow can help critically ill patients with severe respiratory failure, known as ARDS. Matthay hopes the stem cells can help reduce the inflammation associated with some of ARDS most dire respiratory symptoms, and help patients lungs recover.
In all, 120 patients are being enrolled at UCSF Medical Center, Zuckerberg San Francisco General Hospital, the UC Davis Medical Center in Sacramento and hospitals in Oregon and Texas. He said the trial, which includes a small number of ARDS patients who dont have COVID-19, should have results by summer or fall 2021. So far, 28 patients are enrolled in San Francisco.
Lambda-interferon / Stanford University:
Lambda-interferon is a manufactured version of a naturally occurring protein that had been used to treat hepatitis, and researchers hoped it would help patients in the early stages of COVID-19.
Stanford researchers completed their trial of lambda-interferon and found that it did not boost the immune system response to coronavirus infections.
That trial did not find any difference in outcomes between the treatment and placebo, said Yvonne Maldonado, chief of pediatric infectious diseases at Lucile Packard Childrens Hospital at Stanford, where 120 patients were enrolled in the trial. It didnt work.
Remdesivir / Gilead Sciences (Foster City):
Remdesivir, once conceived as a potential treatment for Ebola, was approved by the Food and Drug Administration in October for use on hospitalized COVID-19 patients.
Trademarked under the name Veklury, the drug interferes with the process through which the virus replicates itself. It was one of the drugs given to President Trump and has been used regularly in hospitals under what is known as an emergency use authorization.
It was approved after three clinical trials showed hospitalized coronavirus patients who received remdesivir recovered five days faster on average than those who received a placebo. Patients who required oxygen recovered seven days faster, according to the studies.
Gilead now plans to conduct clinical trials to see how remdesivir works on pediatric patients, from newborns to teenagers, with moderate to severe COVID-19 symptoms. Remdesivir is also being studied with steroids and other drugs to see if it works better as part of a medicinal cocktail. An inhalable form of the drug is also being developed.
Favipiravir / Fujifilm Toyama Chemical (Stanford University):
This antiviral drug, developed in 2014 by a subsidiary of the Japanese film company to treat influenza, is undergoing numerous clinical studies worldwide, including a trial involving 180 patients at Stanford University.
Stanford epidemiologists are testing favipiravir to see if it prevents the coronavirus from replicating in human cells, halts the shedding of the virus and reduces the severity of infection. Unlike remdesivir, it can be administered orally, so it can be used to treat patients early in the disease, before hospitalization is necessary.
The Stanford study has so far enrolled about 90 patients, who are given the drug within 72 hours of when they were first diagnosed with COVID-19. Half of them get a placebo. People can enroll by emailing email@example.com.
REGN-COV2 / Regeneron Pharmaceuticals / Stanford School of Medicine:
The REGN-COV2 cocktail is the same one Trump received, and Stanford is one of dozens of locations nationwide where clinical trials are being held. Two separate trials are under way at Stanford one for hospitalized patients, the other for outpatients. A third trial is about to begin for people who arent sick but are in contact with carriers of the virus.
Regeneron halted testing on severely ill patients requiring high-flow oxygen or mechanical ventilation after the independent Data and Safety Monitoring Board determined that the drug was unlikely to help them.
The drug is a combination of two monoclonal antibodies lab-made clones of the antibodies produced naturally in people who have recovered from COVID-19. The antibodies bind to the virus spike protein and block the virus ability to enter cells.
Dr. Aruna Subramanian, professor of infectious diseases at Stanford and lead investigator for the inpatient trial, said the 21 hospitalized patients in the study receive a high dose like Trump, a lower dose or a placebo. Subramanian plans to expand the inpatient trial to 45 patients. The outpatient study has enrolled a little more than 40 of the 60 patients researchers intend to sign up.
Theres enough promising evidence that it helps people early in the infection, Subramanian said. What we dont know is whether it helps people who are pretty sick but not critically ill.
Bamlanivimab / Eli Lilly / Stanford and UCSF:
Stanford and UCSF are testing the Eli Lilly monoclonal antibodies on outpatients after the pharmaceutical company halted trials on hospitalized COVID-19 patients because of adverse results.
Dr. Andra Blomkalns, chair of emergency medicine at Stanford and the lead in the Eli Lilly outpatient trial, said she is now enrolling older people with comorbidities like heart disease, chronic lung disease, a history of strokes and severe obesity shortly after they test positive.
The hypothesis is that the bamlanivimab monotherapy, which is very similar to the Regeneron monoclonals, might work best early in the infection. Although about 400 patients have been enrolled in the Lilly phase 3 trials nationwide, to date fewer than 10 have been enrolled at Stanford and UCSF.
Matthay, who headed up the Lilly monoclonal study with LY-CoV555 at UCSF, said the cancellation of this inpatient trial was disappointing, but just because this one did not work, doesnt mean another one wont work for hospitalized patients.
Blomkalns said the testing criteria has been changing. She expects the outpatient trial to open soon to adolescents ages 12 and up to determine whether the drug can be used as a preventive.
Designer monoclonal antibodies / Vir Biotechnology, San Francisco:
Scientists at Vir are studying several types of monoclonal antibodies, including a type engineered to activate T cells, which can search out and destroy cells infected with the coronavirus. A study published in the journal Nature in October found that monoclonals, modified to bind with certain receptors, stimulated T cells and improved the human immune response.
By observing and learning from our bodys powerful natural defenses, we have discovered how to maximize the capacity of antibodies through the amplification of key characteristics that may enable more effective treatments for viral diseases, said Herbert Virgin, the chief scientific officer at Vir and co-author of the study.
A similarly modified monoclonal antibody, leronlimab, is being studied in coronavirus clinical trials by its Washington state drugmaker, CytoDyn, which has developed drugs to treat HIV. The companys chief medical officer is in San Francisco, and the company that does laboratory tests of leronlimab is in San Carlos.
Colchicine / UCSF (San Francisco and New York):
The anti-inflammatory drug commonly used to treat gout flare-ups is being studied by scientists at UCSF and New York University. The drug short-circuits inflammation by decreasing the bodys production of certain proteins, and researchers hope that it will reduce lung complications and prevent deaths from COVID-19.
Preliminary results from a clinical trial found that Colchicine can be effective in reducing systemic symptoms of COVID-19 by inhibiting inflammatory biomarkers.
Selinexor / Kaiser Permanente:
Kaiser hospitals in San Francisco, Oakland and Sacramento are studying selinexor, an anticancer drug that blocks a key protein in the cellular machinery for DNA processing. Preliminary findings during the trials indicated that low doses of selinexor helped hospitalized patients with severe COVID-19. The drug has both antiviral and anti-inflammatory properties, and its administered orally, according to Kaisers Dr. Jacek Skarbinski.
VXA-COV2-1 / Vaxart, South San Francisco:
The biotechnology company Vaxart is testing VXA-COV2-1, the only potential vaccine in pill form. It uses the genetic code of the coronavirus to trigger a defensive response in mucous membranes. The hope is that the newly fortified membranes will prevent the virus from entering the body.
Its the only vaccine (candidate) that activates the first line of defense, which is the mucosa, said Andrei Floroiu, Vaxarts chief executive. He said intravenous vaccines kill the virus after it is inside the body, but this one stops it beforehand.
The drug, which is effective against influenza and norovirus, induced both neutralizing antibodies and T cells during coronavirus drug trials, according to preliminary trial results published in September.
VaxiPatch / Verndari (Napa and UC Davis Medical Center):
A Napa company, Verndari, is studying vaccines for COVID-19 that can be delivered using an adhesive patch. Researchers at UC Davis Medical Center in Sacramento said the patch caused an immune response in preclinical tests.
An October report in the online journal ScienceDirect touted the system, saying it could serve as a shelter in place vaccination strategy, in which vulnerable populations receive delivery at home without needing to engage an already-overtaxed health care infrastructure.
If the vaccine is proven effective and safe, patients could receive it through the mail, according to Dr. Daniel Henderson, Verndaris chief executive officer.
ChAdOx1 / AstraZeneca (UCSF, San Francisco General Hospital, Bridge HIV):
Enrollment is under way at 80 sites in the United States, including three in the Bay Area, for the phase 3 trial of AstraZenecas vaccine, developed by Oxford University from an adenovirus, which typically causes colds in chimpanzees.
At least 1,000 of the 40,000 participants in the phase 3 AstraZeneca trial will be from the Bay Area, including 500 at Sutter Healths East Bay AIDS Center in Oakland, 250 at Zuckerberg San Francisco General Hospital and another 250 at Bridge HIV San Francisco.
An interim analysis of trials in Britain and Brazil showed the vaccine was 90% effective in preventing COVID-19 in 131 patients who got a half-dose of the vaccine by mistake. The vaccine was only 62% effective in people who got a full dose, leading to major questions about the results and how the trial was conducted.
Bay Area trial leaders Dr. Annie Luetkemeyer of UCSF and Dr. Susan Buchbinder, director of Bridge HIV and a UCSF professor of medicine and epidemiology, are hoping future trial results are more clear. Thats because AstraZenecas vaccine is cheaper than those made by its rivals Pfizer and Moderna, whose vaccines were 95% and 94.5% effective in preliminary tests.
The AstraZeneca candidate can also be stored at temperatures between 36 and 46 degrees Fahrenheit, which is orders of magnitude higher than the Pfizer and Moderna vaccines. The Pfizer and Moderna vaccines must be kept at 94 degrees below zero Fahrenheit, colder than many storage facilities can manage.
Johnson & Johnson (Stanford University)
The Johnson & Johnson clinical trials have enrolled 20,000 of the 60,000 volunteers worldwide that officials expect to have signed up by Christmas. That includes 70 people at Stanford.
The vaccine is, like the AstraZeneca version, a chimpanzee adenovirus that was genetically altered so that it carries the RNA of the coronavirus spike protein. The technique inspires the body to produce antibodies that block the protein without causing people to get sick.
Phase 2 studies show that it produces a good immune response and the early results of phase 3 show that its safe, said Dr. Philip Grant, assistant professor of infectious disease at Stanford and leader of the trial.
Grant, who is enrolling about 15 people a day for the trial, said he doesnt expect results on the vaccines effectiveness until sometime in March.
Peter Fimrite is a San Francisco Chronicle staff writer. Email: firstname.lastname@example.org Twitter: @pfimrite
Peter Fimrite is The Chronicles lead science reporter, covering environmental, atmospheric and ecosystem science. His beat includes earthquake research, marine biology, wildfire science, nuclear testing, archaeology, wildlife and scientific exploration of land and sea. He also writes about the cannabis industry, outdoor adventure, Native American issues and the culture of the West. A former U.S. Forest Service firefighter, he has traveled extensively and covered a wide variety of issues during his career, including the Beijing Olympics, Hurricane Katrina, illegal American tourism in Cuba and a 40-day cross country car trip commemorating the history of automobile travel in America.
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