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- W2000761791 abstract "Purpose: Increased expression of inducible NO synthase (iNOS) and cyclooxygenase (COX)-2 plays a key role in the pathogenesis of osteoarthritis (OA). Methylation of lysine 4 on histone H3 (H3K4) was shown to be of fundamental importance in the regulation of gene expression. In the present study, we investigated the role of H3K4 methylation in interleukin-1β (IL-1)-induced COX-2 and iNOS expression in human OA chondrocytes Methods: Chondrocytes were stimulated with IL-1 for various time periods and the expression of iNOS and COX-2 mRNAs and proteins were evaluated using real-time reverse transcriptase-polymerase chain reaction (RT-PCR) and Western blotting, respectively. H3K4 methylation at the iNOS and COX-2 promoters was evaluated using chromatin immunoprecipitation (ChIP) assays. The role of histone methylation was further evaluated using the methyltransferase inhibitor, 5’-deoxy-5’(methylthio) adenosine (MTA). Results: IL-1 induced iNOS and COX-2 mRNA and protein in a doseand time-dependent manner. The induction of iNOS and COX-2 expression by IL-1 was associated with H3K4 diand trimethylation at the iNOS and COX-2 promoters, whereas the levels of H3K4 monomethylation remained unchanged. Treatment with MTA inhibited IL-1-induced H3K4 methylation as well as IL-1-induced iNOS and COX-2 expression. Conclusions: These results indicate that H3K4 methylation contributes to IL-1-induced iNOS and COX-2 expression and suggest that this pathway could be a potential target for pharmacological intervention in the treatment of OA." @default.
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- W2000761791 date "2010-10-01" @default.
- W2000761791 modified "2023-09-30" @default.
- W2000761791 title "200 SULFORAPHANE REPRESSES MATRIX-DEGRADING PROTEASES AND PROTECTS CARTILAGE FROM DESTRUCTION IN VITRO" @default.
- W2000761791 doi "https://doi.org/10.1016/s1063-4584(10)60227-0" @default.
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