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Caspase-3 inhibitor inhibits enterovirus D68 production
Wenbo Huo,Jinghua Yu,Chunyu Liu,Ting Wu,Yue Wang,Xiangling Meng,Fengmei Song,Shuxia Zhang,Ying Su,Yumeng Liu,Jinming Liu,Xiaoyan Yu,Shucheng Hua 한국미생물학회 2020 The journal of microbiology Vol.58 No.9
Enterovirus D68 (EVD68) is an emerging pathogen that recently caused a large worldwide outbreak of severe respiratory disease in children. However, the relationship between EVD68 and host cells remains unclear. Caspases are involved in cell death, immune response, and even viral production. We found that caspase-3 was activated during EVD68 replication to induce apoptosis. Caspase-3 inhibitor (Z-DEVDFMK) inhibited viral production, protected host cells from the cytopathic effects of EVD68 infection, and prevented EVD68 from regulating the host cell cycle at G0/G1. Meanwhile, caspase-3 activator (PAC-1) increased EVD68 production. EVD68 infection therefore activates caspase-3 for virus production. This knowledge provides a potential direction for the prevention and treatment of disease related to EVD68.
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m6A writer gene fl(2)d regulates the metamorphosis of silkworm Bombyx mori
Huang Qunxia,Huo Chunyue,Qian Yuxin,Zhao Chenyue,Cai Zhiyan,Zhang Kun,Zhao Xuhui,Guo Shigang,Kan Yunchao,Li Dandan 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.4
The N6-methyladenosine (m6A) is one of the most abundant posttranscriptional modifications on RNAs, which is mediated by its effector proteins—writers, readers, and erasers. Female-Lethal(2)D (Fl(2)d) is one of the key writers to stabilize the interaction between another two writers Methyltransferase-like 3 (METTL3) and Methyltransferase-like 14 (METTL14). Here with dsRNA transfection, fl(2)d was knocked down in the BmN4 cell lines of silkworm, the expression of 61 genes were significantly increased, and 86 genes were significantly decreased after fl(2)d repression, which encoded proteins related to catalytic, hydrolase activity or in metabolism of nucleic acid. To elucidate the functional role of fl(2)d during silkworm development, dsRNA of which was injected into the hemolymph of the 2-d-old fourth instar larvae, the mounting process of silkworm was delayed, the expression level of genes in metabolism, RNA processing and ecdysone signaling pathway decreased significantly after fl(2)d knockdown, such as genes encoded Ubiquitin protein ligase E3C, the nuclear pore complex protein Nup98-Nup96, and the m6A reader YTHDF3, as well as Broad Complex isoform 2 (BRC-Z2), Fushi Tarazu Factor-1 (FTZ-F1), lactate dehydrogenase (LDH) and the ecdysone-induced protein 74EF isoform A (E74A). Total m6A level of RNAs also decreased after fl(2)d repression. These indicated that decreased level of fl (2)d and YTHDF3 decay the m6A level and translation of their target genes, which might lead to the retardation of metamorphosis, and resulted in the delayed mounting of silkworm.
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