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• W2895518858 abstract "Nucleus pulposus (NP) cell senescence is an important cellular feature within the degenerative disc. It is known that a very acidic niche exists in the degenerative disc, which participates in regulating disc cell viability and matrix metabolism.The present study was aimed to investigate the role and potential signaling transduction pathway of an acidic pH in regulating NP cell senescence.Rat NP cells were cultured in an acidic pH of 7.2 close to that in a healthy disc (Control group) or in an acidic pH of 6.2 close to that in a severe degenerative disc (Experiment group) for 10 days. Additionally, the experimental NP cells were incubated along with the inhibitor SB203580 to analyze the role of p38 MAPK pathway in this process.Compared with the control NP cells, experimental NP cells showed a suppressed cell proliferation potency, an increased G0/G1 phase fraction whereas a decreased S-phase fraction and a declined telomerase activity, an up-regulated expression of senescence-related molecules (p16 and p53), and a down-regulated expression of matrix-related moleucles (aggrecan and collagen II). Further analysis showed that inhibition of the p38 MAPK pathway partly reversed effects of acidic pH of 6.2 on the experimental NP cells.The very acidic niche identified in a severe degenerative disc promotes NP cell senescence through regulating the p38 MAPK pathway. The present study provides a new mechanism that drives NP cell senescence during disc degeneration." @default.
• W2895518858 created "2018-10-12" @default.
• W2895518858 creator A5029496793 @default.
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• W2895518858 date "2018-11-14" @default.
• W2895518858 modified "2023-10-06" @default.
• W2895518858 title "Acidic pH promotes nucleus pulposus cell senescence through activating the p38 MAPK pathway" @default.
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• W2895518858 doi "https://doi.org/10.1042/bsr20181451" @default.
• W2895518858 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6239263" @default.
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• W2895518858 hasPublicationYear "2018" @default.
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