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A siRNA targets and inhibits a broad range of SARS-CoV-2 infections including Delta variant #MMPMID35138028
Chang YC; Yang CF; Chen YF; Yang CC; Chou YL; Chou HW; Chang TY; Chao TL; Hsu SC; Ieong SM; Tsai YM; Liu PC; Chin YF; Fang JT; Kao HC; Lu HY; Chang JY; Weng RS; Tu QW; Chang FY; Huang KY; Lee TY; Chang SY; Yang PC
EMBO Mol Med 2022[Apr]; 14 (4): e15298 PMID35138028show ga
The emergence of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) variants has altered the trajectory of the COVID-19 pandemic and raised some uncertainty on the long-term efficiency of vaccine strategy. The development of new therapeutics against a wide range of SARS-CoV-2 variants is imperative. We, here, have designed an inhalable siRNA, C6G25S, which covers 99.8% of current SARS-CoV-2 variants and is capable of inhibiting dominant strains, including Alpha, Delta, Gamma, and Epsilon, at picomolar ranges of IC(50) in vitro. Moreover, C6G25S could completely inhibit the production of infectious virions in lungs by prophylactic treatment, and decrease 96.2% of virions by cotreatment in K18-hACE2-transgenic mice, accompanied by a significant prevention of virus-associated extensive pulmonary alveolar damage, vascular thrombi, and immune cell infiltrations. Our data suggest that C6G25S provides an alternative and effective approach to combating the COVID-19 pandemic.