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- W2182007103 abstract "Extracellular signal regulated kinase (ERK)1/2 and ERK5 are key kinases of the signalling pathways involved in various cellular responses to kidney injury; however, the mechanistic links between those kinase and renin-angiotensin system (RAS) activations in glomerulonephritis (GN) have not been fully elucidated. In this study, we sought to clarify the potential roles of ERK1/2 and ERK5 via RAS activation in the pathogenesis of GN.A rat model of progressive GN was induced by anti-glomerular basement membrane (GBM) injection and the signal transduction pathway in angiotensin II (Ang II)-induced glomerular pathologic alterations were investigated in primary cultured mesangial cells (MCs).Rats developed typical cellular crescents in glomeruli on day 7 that progressed to severe fibrocellular crescents and glomerulosclerosis on day 28. Strong expression of phospho-ERK1/2 was observed on day 7 and phospho-ERK5 expression was markedly increased on day 28 of GN. An angiotensin II type 1 receptor blocker (ARB) suppressed those augmentations. Moreover, ARB treatment attenuated the increases in macrophage infiltration and PCNA-positive cells observed on day 7 in GN rats, as well as the increase in collagen type 1 expression on day 28. Consistently, MCs stimulated by Ang II showed significant increases in proliferation and the expression of MCP-1 and collagen type 1. Interestingly, while the ERK1/2 inhibitor PD98059 abolished the elevations in MCP-1 expression and cell proliferation, the ERK5 inhibitor BIX02189 abrogated the elevation in collagen type 1 expression.Altogether, these data suggest that ERK1/2 regulates acute inflammatory reactions, while ERK5 promotes the development of RAS-induced chronic glomerular fibrosis activation in GN." @default.
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- W2182007103 date "2016-10-11" @default.
- W2182007103 modified "2023-10-05" @default.
- W2182007103 title "Differential regulation of angiotensin II-induced extracellular signal regulated kinase-1/2 and -5 in progressive glomerulonephritis" @default.
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- W2182007103 doi "https://doi.org/10.1111/nep.12685" @default.
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