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Hormone Drugs May Disarm COVID-19 Spike Protein and Stop Disease Progression

Posted By: CrystalRiver
Date: Tuesday, 28-Feb-2023 22:06:11
www.rumormill.news/218246

https://www.pennmedicine.org/news/news-releases/2021/march/hormone-drugs-may-disarm-covid19-spike-protein-and-stop-disease-progression

News Release
Hormone Drugs May Disarm COVID-19 Spike Protein and Stop Disease Progression
A new Penn Medicine study shows how anti-androgen drugs disrupt key receptors required for viral invasion of cells
March 22, 2021

covid19

PHILADELPHIA—Hormone drugs that reduce androgen levels may help disarm the coronavirus spike protein used to infect cells and stop the progression of severe COVID-19 disease, suggests a new preclinical study from researchers in the Abramson Cancer Center at the University of Pennsylvania and published online in Cell Press’s iScience.

Researchers show how two receptors—known as ACE2 and TMPRSS2—are regulated by the androgen hormone and used by SARS-CoV-2 to gain entry into host cells. Blocking the receptors with the clinically proven inhibitor Camostat and other anti-androgen therapies prevented viral entry and replication, they also showed in lab studies.

The findings provide more insight into the molecular mechanisms of the virus but also support the use of anti-androgen therapies to treat COVID-19 infections, which are currently being investigated in clinical trials and have produced promising results. They also support data showing increased mortality and severity of disease among men compared to women, who have much lower levels of androgen.

“We provide the first evidence that not only TMPRSS2, which is known to be regulated by androgen, but ACE2 can also be directly regulated by this hormone,” said senior author Irfan A. Asangani, PhD, an assistant professor of Cancer Biology in the Perelman School of Medicine at the University of Pennsylvania. “We also show that the SARS-CoV-2 spike relies on these two receptors to impale and enter cells, and that they can be blocked with existing drugs. That’s important because if you stop viral entry, you reduce the viral load and disease progression.”

Camostat is a drug approved for use in Japan to treat pancreatitis that inhibits TMPRSS2. Other anti-androgen therapies, including androgen deprivation therapy used to treat prostate cancer, serve similar functions.

Driven by the disparity in COVID-19 rates between men and women, the cancer researchers sought to better understand the role androgen and its receptors played in infections, which has long been known to be a driver of prostate cancer.

The researchers performed experiments with a pseudotype SARS-CoV-2, which carries the spike proteins of the virus but not its genome.

In mice with significantly reduced androgen levels and cells treated with anti-androgen treatments, the researchers found little to no expression of TMPRSS2 and ACE2, suggesting both are regulated by the hormone. They also observed how inhibiting TMPRSS2 with Camostat blocked priming of the spike for entry into cells. That drug, as well as enzalutamide, an anti-androgen therapy used to treat prostate cancer, also blocked the virus’ entry into lung and prostate cells. Combining these therapies, they found, significantly reduced virus entry into cells.

“Together, our data provide a strong rationale for clinical evaluations of TMPRSS2 inhibitors, androgen-deprivation therapy / androgen receptor antagonists alone or in combination with antiviral drugs as early as clinically possible to prevent COVID-19 progression,” the authors wrote.

In March, researchers from Brazil reported preliminary results of 600 hospitalized patients in a clinical trial investigating proxalutamide, a new anti-androgen therapy, for the treatment of COVID-19. The drug reduced mortality risk by 92 percent and shortened the median hospital stay by nine days versus the standard of care, the researchers reported.

Next, Asangani and his colleagues will partner with Susan R. Weiss, PhD, a professor of Microbiology and co-director of the Penn Center for Research on Coronaviruses and Other Emerging Pathogens, to investigate the findings further using live SARS-CoV-2, as well as anti-androgen therapies’ ability to block different variants of the virus, which continue to emerge and are often differentiated by their spike proteins.

Penn co-authors of the study include Qu Deng, Reyaz ur Rasool, Ronnie M. Russell, and Ramakrishnan Natesan.

The study was supported by the National Institutes of Health (R01 CA249210-0), a Department of Defense Idea Development Award, a Conquer Cancer Now Award, and Sarcoma Foundation of America.

TOPIC: COVID-19

----------------------------

Dear RM Agents and Readers,

Licorice root and nicotine both help to block the ace 2 receptor, yet licorice does affect men causing more estrogonic affect. So nicotine gum would be more advisable to the men.

Many Blessings,
CrystalRiver




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