A licensed drug normally used to treat abnormal levels of fatty substances in the blood could reduce infection caused by the SARS-CoV-2 virus by up to 70 percent, reveals a study in the laboratory by an international collaboration of researchers.
The research team, led by the University of Birmingham and Keele University in the UK and the San Raffaele Scientific Institute in Italy, has demonstrated that fenofibrate and its active form (fenofibric acid) can significantly reduce SARS-COV-2 infection in human cells in the laboratory. Importantly, reduction of infection was obtained using concentrations of the drug which are safe and achievable using the standard clinical dose of fenofibrate. Fenofibrate, which is approved for use by most countries in the world including the US Food and Drug Administration (FDA) and the UK's National Institute for Health and Care Excellence (NICE), is an oral drug currently used to treat conditions such as high levels of cholesterol and lipids (fatty substances) in the blood.
The team is now calling for clinical trials to test the drug in hospitalized COVID-19 patients, to be carried out in addition to two clinical trials also currently underway in such patients in research being led by the Hospital of the University of Pennsylvania in the US and Hebrew University of Jerusalem in Israel.
SARS-CoV-2, the virus that causes COVID-19, infects the host through an interaction between the Spike protein on the surface of the virus and the ACE2 receptor protein on host cells. In this study, responding to the global COVID-19 pandemic, the team tested a panel of already licensed drugs—including fenofibrate—to identify candidates that disrupt ACE2 and Spike interactions. Having identified fenofibrate as a candidate, they then tested the efficacy of the drug in reducing infection in cells in the laboratory using the original strains of the SARS-CoV-2 virus isolated in 2020. They found fenofibrate reduced infection by up to 70%. Additional unpublished data also indicates that fenofibrate is equally effective against the newer variants of SARS-CoV-2 including the alpha and beta variants and research is ongoing into its efficacy in the delta variant.
Corresponding author Dr. Farhat Khanim, of the University of Birmingham in the UK, explained: "The development of new more infectious SARS-CoV-2 variants has resulted in a rapid expansion in infection rates and deaths in several countries around the world, especially the UK, US and Europe. Whilst vaccine programs will hopefully reduce infection rates and virus spread in the longer term, there is still an urgent need to expand our arsenal of drugs to treat SARS-CoV-2-positive patients."