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Changes in the metabolism of chondroitin sulfate glycosaminoglycans in articular cartilage from patients with Kashin-Beck disease

Luo, M., Chen, J., Li, S., Sun, H., Zhang, Z., Fu, Q., Li, J., Wang, J., Hughes, C. E. ORCID:, Caterson, B. ORCID: and Cao, J. 2014. Changes in the metabolism of chondroitin sulfate glycosaminoglycans in articular cartilage from patients with Kashin-Beck disease. Osteoarthritis and Cartilage 22 (7) , pp. 986-995. 10.1016/j.joca.2014.05.012

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Objectives To identify changes in the expression patterns of enzymes involved in chondroitin sulfate (CS) glycosaminoglycan (GAG) metabolism in articular cartilage proteoglycan (PG) isolated from adolescent patients with Kashin–Beck disease (KBD). Methods Samples of articular cartilage were divided into two groups: Control samples (from five normal children), and KBD samples (from five KBD children) aged 3–12 years old. The morphology and pathology of hand joint cartilage were examined by histochemical staining. The localization and expression patterns of enzymes involved in CS GAG metabolism (i.e., PAPS synthetase 2 (PAPSS2), PAPS transporter 1 (PAPST1), Carbohydrate (N-acetylgalactosamine 4-sulfate 6-O) sulfotransferases 15 (CHST15), Arylsulfatase B (ARSB) and N-acetylgalactosamine-6-sulfate sulfatase (GALNS)) were performed using immuno-histochemical analyses. Positive immunostaining in articular cartilage was semi-quantified. Results Reduced aggrecan staining was observed in KBD samples compared with the control samples. The percentages of positive staining for the anabolic enzymes PAPSS2, PAPST1 and CHST15 in the upper and middle zones of KBD samples were significantly lower than that found in the Controls. In contrast, the percentages of positive staining in KBD samples for the catabolic enzymes ARSB and GALNS were significantly higher than the control samples. However, the staining for all of these GAG metabolism enzymes were hardly observed in the deep zones of KBD cartilage, suggesting that significant cell death and necrosis had occurred in this region. Conclusions Our results indicate that alterations of enzymes involved in articular cartilage CS GAG metabolism on PGs in the articular cartilage play an important role in the onset and pathogenesis of KBD in adolescent children.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Subjects: Q Science > Q Science (General)
Uncontrolled Keywords: Kashin–Beck disease; cartilage; aggrecan; glycosaminoglycan sulfation.
Publisher: Elsevier
ISSN: 1063-4584
Funders: National Natural Science Foundation of China, Fundamental Research Funds for the Central Universities of China, Arthritis Research UK Funding
Date of Acceptance: 7 May 2014
Last Modified: 25 Oct 2022 10:13

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