Coronavirus Disease 2019 (COVID-19) caused by SARS-CoV-2 has become a global health issue. The clinical presentation of COVID-19 is highly variable, ranging from asymptomatic and mild disease to severe. However, the mechanisms for the high mortality induced by SARS-CoV-2 infection are still not well understood. Recent studies have indicated that the cytokine storm might play an essential role in the disease progression in patients with COVID-19, which is characterized by the uncontrolled release of cytokines and chemokines leading to acute respiratory distress syndrome (ARDS), multi-organ failure, and even death. Cell death, especially, inflammatory cell death, might be the initiation of a cytokine storm caused by SARS-CoV-2 infection. This review summarizes the forms of cell death caused by SARS-CoV-2 in vivo or in vitro and elaborates on the dedication of apoptosis, necroptosis, NETosis, pyroptosis of syncytia, and even SARS-CoV-2 E proteins forming channel induced cell death, providing insights into targets on the cell death pathway for the treatment of COVID-19.
From the deep-sea-derived Fusarium sp. ZEN-48, four known compounds were obtained. Their structures were established by extensive analyses of the NMR, HR-ESI-MS, and the X-ray crystallographic data as brefeldin A (BFA, 1), brevianamide F (2), N-acetyltryptamine (3), and (+)-diaporthin (4). Although BFA was extensively investigated for its potent bioactivities, its role on TNFα-induced necroptosis was incompletely understood. In this study, BFA showed significant inhibition on TNFα-induced necroptosis by disrupting the necrosome formation and suppressing the phosphorylation of RIPK3 and MLKL (IC 50 = 0.5 μM). While, it had no effect on TNFα-induced NF-кB/MAPKs activation and apoptosis. The finding raised significant implications of BFA for necroptosis-related inflammatory disease therapy and new drug development from marine fungi.
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