2013
DOI: 10.1074/jbc.m112.419887
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Regulation of Xylosyltransferase I Gene Expression by Interleukin 1β in Human Primary Chondrocyte Cells

Abstract: Background: Xylosyltransferase I plays a critical role in proteoglycan synthesis. Results: IL-1␤ cytokine regulates xylosyltranserase I expression into an early phase of induction and a late phase of repression through AP-1 and Sp3, respectively. Conclusion: AP-1 and Sp3 are key regulators of IL-1␤-mediated modulation of xylosyltransferase I expression. Significance: Sp3 may be a putative target to prevent IL-1␤-mediated inhibition of proteoglycan synthesis during osteoarthritis.

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Cited by 21 publications
(33 citation statements)
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“…As a typical pro-inflammatory factor in OA pathophysiology, IL-1β could inhibit synthesis of GAG due to decrease gene expression and enzyme activity of GTs [23], [24]. On the contrary, IGF-1 is one of the key protective factors of cartilage.…”
Section: Introductionmentioning
confidence: 99%
“…As a typical pro-inflammatory factor in OA pathophysiology, IL-1β could inhibit synthesis of GAG due to decrease gene expression and enzyme activity of GTs [23], [24]. On the contrary, IGF-1 is one of the key protective factors of cartilage.…”
Section: Introductionmentioning
confidence: 99%
“…TNF-α also suppresses bone formation via increased osteoblast apoptosis [24], and reduced differentiation and proliferation of osteoblasts and their progenitors [25]. IL-1β reduces chondrocyte proteoglycan synthesis [26], increases the synthesis of matrix metalloproteinases and the release of nitric oxide [27]. Transgenic mice deficient in IL-1 receptor antagonist spontaneously develop a chronic arthritis similar to RA with bone erosions and present higher susceptibility for collagen-induced arthritis [28].…”
Section: Discussionmentioning
confidence: 99%
“…Attention was particularly paid to glycosyltransferases involved in the tetrasaccharide linkage region, especially, β1,3-glucuronosyltransferase 1 and xyloxyltransferase-1 as their expression level was particularly depressed during OA or after addition of IL-1β on chondrocytes [3,31], thus explaining the decrease in the content of proteoglycans in cartilage [32].…”
Section: Polysaccharides From Angelica Sinensis Promote Proteoglycan mentioning
confidence: 99%