Pan-SARS-CoV-2 prophylactic and therapeutic - TMPRSS2 inhibitor

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The discussion highlights concerns regarding the interference of a drug with the reconfiguration of the SARS-CoV-2 spike protein. Published in Nature, the article emphasizes that TMPRSS2, a human protein, plays a crucial role in processing the spike protein but also has normal functions in the body. While antiviral drugs targeting host proteins can be effective, they may lead to side effects that limit their use, particularly for long-term prophylaxis. The drug in question appears suitable for short-term use in exposed individuals or treatment, provided toxicity is manageable. However, the study only tests the drug in cell culture, raising concerns about its effects in living organisms and the potential negative impacts of reduced TMPRSS2 function throughout the body.
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Note that TMPRSS2 is a human protein that has normal functions in the human body aside from being hijacked to help process the SARS-CoV-2 spike protein. While there are successful antiviral drugs that target host proteins, these drugs are more likely to have side effects that could limit the use or efficacy of the drug. For example, this drug would not seem like a good candidate for long term prophylactic use, though it could potentially be used for short term prophylaxis in exposed individuals or for treatment if toxicity is not an issue. Notably, the paper (at least from reading the abstract) tests the drug only in cell culture while it would be important to test the drug in intact organisms to see if systemic administration of the drug has any negative effects from loss/reduction of TMPRSS2 function across the body.
 
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Likes jim mcnamara, Tom.G and Oldman too
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