Abstract:
:Hemorrhage is one of the most obvious pathological phenomena in grass carp reovirus (GCRV) infection. The etiology of GCRV-induced hemorrhage is unclear. We found inducible nitric oxide synthase (iNOS) may relate to viral hemorrhage according to the previous studies, which is expressed at high levels after GCRV infection and is related to apoptosis. In this study, we aimed to investigate the mechanism of iNOS on apoptosis and hemorrhage at the cell level and individual level on subjects who were infected with GCRV and treated with S-methylisothiourea sulfate (SMT), an iNOS inhibitor. Cell structure, apoptosis rate, and hemorrhage were evaluated through fluorescence microscopy, Annexin V-FITC staining, and H&E staining, respectively. Cell samples and muscle tissues were collected for Western blotting, NO concentration measure, caspase activity assay, and qRT-PCR. iNOS-induced cell apoptosis and H&E staining showed that the vascular wall was broken after GCRV infection in vivo. When the function of iNOS was inhibited, NO content, apoptosis rate, caspase activity, and hemorrhage were reduced. Collectively, these results suggested iNOS plays a key role in apoptosis of vascular endothelial cells in GCRV-induced hemorrhage. This study is the first to elucidate the relationship between iNOS-induced cell apoptosis and GCRV-induced hemorrhage, which lays the foundation for further mechanistic research of virus-induced hemorrhage.
journal_name
Int J Mol Scijournal_title
International journal of molecular sciencesauthors
Liang B,Su Jdoi
10.3390/ijms20246335subject
Has Abstractpub_date
2019-12-16 00:00:00issue
24issn
1422-0067pii
ijms20246335journal_volume
20pub_type
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