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- W4242910414 abstract "Abstract Background: To examine critical interactions between juvenile idiopathic arthritis synovial fibroblasts (JFLS) and chondrocytes (Ch), and their role in bony overgrowth seen in patients with juvenile idiopathic arthritis (JIA). Methods: Control (CFLS) and JFLS were cultured in media containing recombinant BMP4. Ch were cultured in either CFLS or JFLS conditioned-media. Media supernatants were analyzed by ELISA. RNA was analyzed by ClariomS microarray. Results: As expected, genes expressed in JFLS and CFLS were similar to each other and this expression differed from Ch. JFLS favor BMP ligand gene expression while downregulating TGFβ receptors’ expression. Noggin and chordin, antagonists with high affinity for BMP4, are JFLS- but not Ch-preferred regulators of BMP signaling. Compared to Ch, JFLS overexpress collagen X (COLX), a marker of chondrocyte hypertrophy. Exogenous BMP4 causes JFLS to significantly decrease expression of noggin and collagen II (COL2), a marker of chondrocyte proliferation, and causes overexpression of COLX and alkaline-phosphatase (ALP). Chondrocytes cultured in JFLS-conditioned media (Ch-JFLS) express BMP genes and favor chordin protein expression over other antagonists. Ch-JFLS have significantly increased expression of COL2 and significantly decreased expression of COLX. Conclusions: These data suggest JFLS, in the presence of BMP4, undergo hypertrophy and that JFLS-conditioned media influence chondrocytes to become highly proliferative. To the authors’ knowledge, no prior study has shown that JFLS and chondrocytes play a direct role in the bony overgrowth in joints of patients with JIA and that BMPs or regulation of these growth factors influence the interaction between two prominent synovial cell types." @default.
- W4242910414 created "2022-05-12" @default.
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- W4242910414 date "2020-02-05" @default.
- W4242910414 modified "2023-10-16" @default.
- W4242910414 title "Juvenile Idiopathic Arthritis Fibroblast-like Synoviocytes, through BMP signaling, play a central role in joint growth disturbances" @default.
- W4242910414 doi "https://doi.org/10.21203/rs.2.22272/v1" @default.
- W4242910414 hasPublicationYear "2020" @default.
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