LA JOLLA, CA—The COVID-causing virus SARS-CoV-2 harbors a vulnerable site at the base of its spike protein that is found also on closely related coronaviruses, according to a new study from Scripps Research. The discovery, published Feb 8 in Science Translational Medicine, could inform the design of broad-acting vaccines and antibody therapies capable of stopping future coronavirus pandemics.
The scientists had previously isolated an antibody from a COVID-19 survivor that can neutralize not only SARS-CoV-2 but also several other members of the family of coronaviruses known as beta-coronaviruses. In the new work, they mapped at atomic scale the site, or “epitope,” to which the antibody binds on the SARS-Cov-2 spike protein. They showed that the same epitope exists on other beta coronaviruses, and demonstrated with animal models that the antibody is protective against the effects of SARS-CoV-2 infection.
“We’re hopeful that the identification of this epitope will help us develop vaccines and antibody therapies that work against all beta-coronaviruses, including coronaviruses that may jump from animals to humans in the future,” says study co-senior author Raiees Andrabi, PhD, an institute investigator in the Department of Immunology and Microbiology at Scripps Research.
Beta-coronaviruses have emerged recently as major, ongoing threats to public health. These coronaviruses include SARS-CoV-1, which killed about 800 people, mostly in Asia, in a series of outbreaks in 2002-04; MERS-CoV, which has killed about 900 people, mostly in the Middle East, since 2012; and, of course, SARS-CoV-2, which by now has killed over 5 million people worldwide in the COVID-19 pandemic. Two other beta coronaviruses, HCoV-HKU1 and HCoV-OC43, cause only common colds, but are suspected of having caused deadly pandemics centuries ago, when they first jumped from animals to humans. Researchers widely believe that future coronavirus pandemics initiated by animal-to-human spread are inevitable.
That prospect has spurred efforts towards the development of a pan-beta-coronaviral vaccine or antibody therapy. Scripps researchers took an initial step in that direction in 2020 when they identified an antibody, in a blood sample from a COVID-19 survivor, that could neutralize both SARS-CoV-2 and SARS-CoV-1. Although neutralizing tests weren’t available for all other beta-coronaviruses, they found that the antibody at least bound to most of these viruses.
In the new study, the team used X-ray crystallography and other techniques to precisely map the antibody’s binding site on the SARS-CoV-2 spike protein. They showed that the same site is found on most other beta coronaviruses—which helps explain the antibody’s broad effect on these viruses.
“The site is on the stem of the viral spike protein and is part of the ‘machinery’ the virus uses to fuse with cell membranes in its human or animal hosts after the virus has initially bound to a cell-surface receptor,” says study co-senior author Dennis Burton, PhD, Chair of the Department of Immunology and Microbiology at Scripps Research. “Fusion allows the viral genetic material to enter and take over host cells, and the crucial role of this machinery explains why the site is consistently present across beta-coronaviruses.”
By contrast, the receptor binding site at the top of the viral spike protein mutates relatively rapidly and thus tends to vary greatly from one beta-coronavirus to the next—making it a poor target for broad beta-coronavirus vaccines or antibody therapies.
The researchers now are following up with efforts to find other, perhaps even more broadly effective antibodies, in their search for optimal antibodies and vaccines against coronaviruses.
https://www.science.org/doi/10.1126/scitranslmed.abi9215
*********************************************Decades-Old Drug May Help Protect Against Severe COVID-19 Symptoms: Study
A drug that was approved by U.S. regulators more than 70 years ago may help protect against two major COVID-19 symptoms, according to a new study.
Disulfiram, approved to treat alcoholism, protected rodents infected with COVID-19 from lung injury in the preclinical study done by researchers at Weill Cornell Medicine and Cold Spring Harbor Laboratory.
Certain white blood cells called neutrophils form inside some people suffering from COVID-19, damaging the lungs. No drugs have yet been found to prevent this from happening, researchers said.
Disulfiram, though, dramatically reduced the formation of neutrophil extracellular traps (NET), which cause fluid to accumulate in the lungs and sometimes lead to blood clots.
Researchers dosed the mice with disulfiram a day before and three hours after infecting them with the virus that causes COVID-19. Some 95 percent of those mice survived, compared to 40 percent not treated with the drug.
The new study and a previous one that linked disulfiram with reduced NET formation and improved survival “suggest that disulfiram could be useful in the management of pathologies involving NETs, including lung injuries, sepsis, thrombosis, and cancer,” the researchers said in the paper, which was published by The Journal of Clinical Investigation on Feb. 8.
“As we learn more about the underlying biology of these lung injuries, we may be able to specifically target the processes that are damaging the lung tissue,” Dr. Robert Schwartz, an associate professor of medicine in the gastroenterology and hepatology division at Weill Cornell Medicine, said in a statement.
“Currently there aren’t any good treatment options for COVID-related lung injury, so disulfiram appears to be worth investigating further in this regard, particularly in severe COVID-19 patients.”
Disulfiram has previously been associated in observational studies with lowering the risk of infection from SARS-CoV-2, also known as the CCP virus, which causes COVID-19.
One study of the drug in human patients with moderate COVID-19 was completed in 2021, but results haven’t yet been posted. A separate trial testing the drug against COVID-19 in humans has not yet been completed.
The new study was funded by the Cold Spring Harbor Laboratory Cancer Center and the Pershing Square Foundation, among other institutions.
Other drugs approved for different uses have shown some success against COVID-19, including ivermectin, hydroxychloroquine, and fluvoxamine, though U.S. health officials primarily recommend ones such as paxlovid that are specifically approved for combating the illness.
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‘There’s No Law’: Physician Experienced in Investigating Biological Warfare Challenges Medical Board’s Misinformation Allegation
Though Dr. Meryl Nass, a board-certified internal medicine physician, has been untangling narratives of dis- and misinformation long before COVID-19, it wasn’t until recently that her license was temporarily suspended under the allegation that she is now spreading it.
Her research has brought her before Congress and state legislatures to give testimonies on bioterrorism, Gulf War syndrome, and vaccine safety.
Throughout her career, she’s consulted for international health and intelligence agencies regarding prevention, investigation, and mitigation of chemical and biological warfare and pandemics.
She spent three years investigating what had been deemed a naturally occurring anthrax outbreak during Rhodesia’s civil war.
Nass was able to prove that it was due to biological warfare, with her findings published in a 1992 paper that marked a new achievement in scientific research.
“This was important because it was the first time in history potential perpetrators learned they could be identified,” Nass told The Epoch Times. “You couldn’t just start an epidemic somewhere and assume that no one was ever going to prove it because there wasn’t any scientific way to prove that it was done. I established that way.”
She was the main author, along with Robert F. Kennedy Jr. (author of “The Real Anthony Fauci”) and Children’s Health Defense, of a citizen’s petition to the Food and Drug Administration (FDA) and its vaccine advisory committee regarding the authorization of COVID vaccines and why she said they’re not suitable for children.
As censorship and disinformation have thickened around the COVID narrative, Nass has followed and written about the suppression of early-treatment medication such as hydroxychloroquine and ivermectin.
Given this background, the Maine Medical Board of Licensure nevertheless saw it appropriate to charge Nass—a physician for 41 years—with misinformation, an allegation that came with no explanation as to what misinformation she was spreading.
“Never before has any censorship been imposed by a collection of organizations who are attempting to make law by whining in unison about misinformation with threats to licenses and board certifications—while there is no legal mechanism by which they can strip certification,” Nass said. “There are no rules, regulations, or laws underpinning the threats of punishment for ‘spreading misinformation.’”
The Maine Medical Board of Licensure didn’t respond to The Epoch Times’ request for comment.
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Big Tech Censored Dozens of Doctors, More Than 800 Accounts for COVID-19 ‘Misinformation,’ Study Finds
Major technology companies and social media platforms have removed, suppressed or flagged the accounts of more than 800 prominent individuals and organizations, including medical doctors, for COVID-19 “misinformation,” according to a new study from the Media Research Center.
The study focused on acts of censorship on major social media platforms and online services, including Facebook, YouTube, Instagram, Twitter, LinkedIn, Google Ads, and TikTok.
Instances of censorship included Facebook’s decision to flag the British Medical Journal with a “fact check” and “missing context” label, reducing the visibility of a post, for a study delving into data-integrity issues with a Pfizer vaccine clinical trial.
Facebook also deleted the page of the Great Barrington Declaration, an open letter led by dozens of medical professionals, including Dr. Jay Battacharya, a Stanford epidemiologist, and Dr. Martin Kulldorff, a former employee of the Centers for Disease Control and Prevention, which advocated for less restrictive measures to address the dangers of COVID-19.
“Big Tech set up a system where you can’t disagree with ‘the science’ even though that’s the foundation of the scientific method,” Dan Gainor, MRC vice president of Free Speech America, told the Daily Caller National Foundation. “If doctors and academic journals can’t debate publicly, then it’s not science at all. It’s ‘religion.’”
Big Tech also scrubbed podcast host Joe Rogan’s interviews with scientists Dr. Peter McCullough and Dr. Robert Malone, the latter of whom was instrumental in pioneering mRNA technology. Twitter banned Malone from its platform permanently in late December over the virologist’s tweets questioning the efficacy and safety of the COVID-19 vaccine.
“We tallied 32 different doctors who were censored, including mRNA vaccine innovator Dr. Robert Malone,” Gainor said. “Censoring views of credentialed experts doesn’t ensure confidence in vaccines. It undermines faith in government COVID-19 strategies.“
In addition to medical doctors, the study examined instances in which members of Congress were censored by tech platforms.
These included an incident last August in which YouTube suspended Sen. Rand Paul, R-Ky., for posting a video arguing that “cloth masks” are not effective against the coronavirus, a view later echoed by many prominent medical commentators.
Twitter also flagged a tweet from Rep. Thomas Massie, R-Ky., in which he wrote “studies show those with natural immunity from a prior infection are much less likely to contract and spread COVID than those who only have vaccine-induced immunity.”
The study also examined Big Tech censorship of prominent media personalities, such as Rogan, Tucker Carlson, and Dan Bongino.
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Also see my other blogs. Main ones below:
http://edwatch.blogspot.com (EDUCATION WATCH)
http://antigreen.blogspot.com (GREENIE WATCH)
http://pcwatch.blogspot.com (POLITICAL CORRECTNESS WATCH)
http://australian-politics.blogspot.com/ (AUSTRALIAN POLITICS)
http://snorphty.blogspot.com/ (TONGUE-TIED)
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