Pharmacological inhibition of fatty acid synthesis blocks SARS-CoV-2 replication

Junjun Chu, Changsheng Xing, Yang Du, Tianhao Duan, Siyao Liu, Pengfei Zhang, Chumeng Cheng, Jill Henley, Xin Liu, Chen Qian, Bingnan Yin, Helen Yicheng Wang, Rong Fu Wang

Research output: Contribution to journalArticlepeer-review

68 Scopus citations


Caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), COVID-19 is a virus-induced inflammatory disease of the airways and lungs that leads to severe multi-organ damage and death. Here we show that cellular lipid synthesis is required for SARS-CoV-2 replication and offers an opportunity for pharmacological intervention. Screening a short-hairpin RNA sublibrary that targets metabolic genes, we identified genes that either inhibit or promote SARS-CoV-2 viral infection, including two key candidate genes, ACACA and FASN, which operate in the same lipid synthesis pathway. We further screened and identified several potent inhibitors of fatty acid synthase (encoded by FASN), including the US Food and Drug Administration-approved anti-obesity drug orlistat, and found that it inhibits in vitro replication of SARS-CoV-2 variants, including more contagious new variants, such as Delta. In a mouse model of SARS-CoV-2 infection (K18-hACE2 transgenic mice), injections of orlistat resulted in lower SARS-CoV-2 viral levels in the lung, reduced lung pathology and increased mouse survival. Our findings identify fatty acid synthase inhibitors as drug candidates for the prevention and treatment of COVID-19 by inhibiting SARS-CoV-2 replication. Clinical trials are needed to evaluate the efficacy of repurposing fatty acid synthase inhibitors for severe COVID-19 in humans.

Original languageEnglish (US)
Pages (from-to)1466-1475
Number of pages10
JournalNature Metabolism
Issue number11
StatePublished - Nov 2021

ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism
  • Physiology (medical)
  • Cell Biology


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