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Azvudine is a thymus-homing anti-SARS-CoV-2 drug effective in treating COVID-19 patients

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机构: [1]State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, China [2]lnstitute of Medicinal Biotechnology, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, China [3]lnstitute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Kunming 650031 Yunnan, China [4]Genuine Biotech. Inc., Pingdingshan 467000 Henan, China [5]Department of Respiratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan Research Center for Infectious Diseases and Cancer, Wuhan 430071 Hubei, China [6]the First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou 450000 Henan, China [7]Department of Internal Medicine, Henan Provincial Peoples Hospital, Zhengzhou 450003 Henan, China [8]Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007 Henan, China [9]National Clinical Research Center for Respiratory Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100005, China [10]School of Chemistry, Zhengzhou University, Zhengzhou 450001 Henan, China
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Azvudine (FNC) is a nucleoside analog that inhibits HIV-1 RNA-dependent RNA polymerase (RdRp). Recently, we discovered FNC an agent against SARS-CoV-2, and have taken it into Phase III trial for COVID-19 patients. FNC monophosphate analog inhibited SARS-CoV-2 and HCoV-OC43 coronavirus with an EC50 between 1.2 and 4.3 μM, depending on viruses or cells, and selective index (SI) in 15-83 range. Oral administration of FNC in rats revealed a substantial thymus-homing feature, with FNC triphosphate (the active form) concentrated in the thymus and peripheral blood mononuclear cells (PBMC). Treating SARS-CoV-2 infected rhesus macaques with FNC (0.07 mg/kg, qd, orally) reduced viral load, recuperated the thymus, improved lymphocyte profiles, alleviated inflammation and organ damage, and lessened ground-glass opacities in chest X-ray. Single-cell sequencing suggested the promotion of thymus function by FNC. A randomized, single-arm clinical trial of FNC on compassionate use (n = 31) showed that oral FNC (5 mg, qd) cured all COVID-19 patients, with 100% viral ribonucleic acid negative conversion in 3.29 ± 2.22 days (range: 1-9 days) and 100% hospital discharge rate in 9.00 ± 4.93 days (range: 2-25 days). The side-effect of FNC is minor and transient dizziness and nausea in 16.12% (5/31) patients. Thus, FNC might cure COVID-19 through its anti-SARS-CoV-2 activity concentrated in the thymus, followed by promoted immunity.© 2021. The Author(s).

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大类 | 1 区 医学
小类 | 1 区 生化与分子生物学 1 区 细胞生物学
最新[2023]版:
大类 | 1 区 医学
小类 | 1 区 生化与分子生物学 1 区 细胞生物学
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第一作者机构: [1]State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, China
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通讯机构: [1]State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, China [2]lnstitute of Medicinal Biotechnology, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, China [8]Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007 Henan, China [10]School of Chemistry, Zhengzhou University, Zhengzhou 450001 Henan, China
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