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Hydroxychloroquine, a less toxic derivative of chloroquine, is effective in inhibiting SARS-CoV-2 infection in vitro
Liu et al., Cell Discovery 6, 16 (2020), doi:10.1038/s41421-020-0156-0 (In Vitro)
Liu et al., Hydroxychloroquine, a less toxic derivative of chloroquine, is effective in inhibiting SARS-CoV-2 infection in.., Cell Discovery 6, 16 (2020), doi:10.1038/s41421-020-0156-0 (In Vitro)
Mar 2020   Source   PDF  
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In Vitro study showing that HCQ is effective in vitro and less toxic than CQ. In addition to direct antiviral activity, HCQ is a safe and successful anti-inflammatory agent that has been used extensively in autoimmune diseases and can significantly decrease the production of cytokines and, in particular, pro-inflammatory factors. Therefore, in COVID-19 patients, HCQ may also contribute to attenuating the inflammatory response. Careful design of clinical trials is important to achieve efficient and safe control of the infection.
14 In Vitro studies support the efficacy of HCQ [Andreani, Clementi, Dang, Delandre, Faísca, Hoffmann, Liu, Ou, Purwati, Sheaff, Wang, Wang (B), Yao, Yuan].
Liu et al., 18 Mar 2020, peer-reviewed, 10 authors.
In Vitro studies are an important part of preclinical research, however results may be very different in vivo.
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Abstract: Liu et al. Cell Discovery (2020)6:16 https://doi.org/10.1038/s41421-020-0156-0 CORRESPONDENCE Cell Discovery www.nature.com/celldisc Open Access Hydroxychloroquine, a less toxic derivative of chloroquine, is effective in inhibiting SARS-CoV-2 infection in vitro 1234567890():,; 1234567890():,; 1234567890():,; 1234567890():,; Jia Liu1, Ruiyuan Cao2, Mingyue Xu1,3, Xi Wang1, Huanyu Zhang1,3, Hengrui Hu1,3, Yufeng Li1,3, Zhihong Hu Wu Zhong2 and Manli Wang1 Dear Editor, The outbreak of coronavirus disease 2019 (COVID-19) caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2/2019-nCoV) poses a serious threat to global public health and local economies. As of March 3, 2020, over 80,000 cases have been confirmed in China, including 2946 deaths as well as over 10,566 confirmed cases in 72 other countries. Such huge numbers of infected and dead people call for an urgent demand of effective, available, and affordable drugs to control and diminish the epidemic. We have recently reported that two drugs, remdesivir (GS-5734) and chloroquine (CQ) phosphate, efficiently inhibited SARS-CoV-2 infection in vitro1. Remdesivir is a nucleoside analog prodrug developed by Gilead Sciences (USA). A recent case report showed that treatment with remdesivir improved the clinical condition of the first patient infected by SARS-CoV-2 in the United States2, and a phase III clinical trial of remdesivir against SARSCoV-2 was launched in Wuhan on February 4, 2020. However, as an experimental drug, remdesivir is not expected to be largely available for treating a very large number of patients in a timely manner. Therefore, of the two potential drugs, CQ appears to be the drug of choice for large-scale use due to its availability, proven safety record, and a relatively low cost. In light of the preliminary clinical data, CQ has been added to the list of Correspondence: Zhihong Hu (huzh@wh.iov.cn) or Wu Zhong (zhongwu@bmi.ac.cn) or Manli Wang (wangml@wh.iov.cn) 1 State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, 430071 Wuhan, China 2 National Engineering Research Center for the Emergency Drug, Beijing Institute of Pharmacology and Toxicology, 100850 Beijing, China Full list of author information is available at the end of the article. These authors contributed equally: Jia Liu, Ruiyuan Cao, Mingyue Xu 1 , trial drugs in the Guidelines for the Diagnosis and Treatment of COVID-19 (sixth edition) published by National Health Commission of the People’s Republic of China. CQ (N4-(7-Chloro-4-quinolinyl)-N1,N1-diethyl-1,4pentanediamine) has long been used to treat malaria and amebiasis. However, Plasmodium falciparum developed widespread resistance to it, and with the development of new antimalarials, it has become a choice for the prophylaxis of malaria. In addition, an overdose of CQ can cause acute poisoning and death3. In the past years, due to infrequent utilization of CQ in clinical practice, its production and market supply was greatly reduced, at least in China. Hydroxychloroquine (HCQ) sulfate, a derivative of CQ, was first synthesized in 1946 by introducing a hydroxyl group into CQ and was demonstrated to be much less (~40%) toxic than CQ in animals4. More importantly, HCQ is still widely available to treat autoimmune diseases, such as systemic lupus erythematosus and rheumatoid arthritis. Since CQ and HCQ share similar chemical structures and mechanisms of acting as..
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