Study on expression of NO and iNOS in J774A. 1 cells induced by rVvhA

VernacularTitle:创伤弧菌溶细胞素融合蛋白对小鼠单核巨噬细胞产NO及其合酶的影响
Author: Jimei DU ; Yajun GUO ; Yanye TU ; Die HU ; Yongliang LOU ; Jie YAN
Publication Type:Journal Article
Keywords: Vibrio vulnificus; Cytolysin; J774A. 1; Nitric oxide; Induced nitric oxide synthase
From: Chinese Journal of Microbiology and Immunology 2010;30(10):887-891
CountryChina
Language:Chinese
Abstract: Objective To investigate the effect of recombinant Vibrio vulnificus hemolysin (rVvhA) on the expression of nitric oxide(NO) and induced nitric oxide synthase(iNOS) in J774A. 1 cells.Methods The inhibitory effect of rVvhA on J774A. 1 proliferation was measured by MTF colorimetry technique. The content of nitrite in culture medium was determined by Griess reagent. The expression of iNOS protein and mRNA were measured by immunofluorescence and RT-PCR, respectively. Results The viability of J774A. 1 cells was apparently inhibited when exposed to 0.8 HU/ml rVvhA and up. With the help of IFN-γ, the expression of NO and the activity of iNOS in J774A. 1 cells were remarkably increased when exposed to 0.4 HU/ml rVvhA. Conclusion rVvhA can increase the expression of NO and iNOS, it may play an important role in the pathogenic mechanism of Vibrio vulnificus.