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- W2073960226 abstract "Proteoglycan-4 (Prg4) protects synovial joints from arthropathic changes by mechanisms that are incompletely understood. Parathyroid hormone (PTH), known for its anabolic actions in bone, increases Prg4 expression and has been reported to inhibit articular cartilage degeneration in arthropathic joints. To investigate the effect of Prg4 and PTH on articular cartilage, 16-week-old Prg4 mutant and wild-type mice were treated with intermittent PTH (1–34) or vehicle control daily for six weeks. Analyses included histology of the knee joint, micro-CT of the distal femur, and serum biochemical analysis of type II collagen fragments (CTX-II). Compared to wild-type littermates, Prg4 mutant mice had an acellular layer of material lining the surfaces of the articular cartilage and menisci, increased articular cartilage degradation, increased serum CTX-II concentrations, decreased articular chondrocyte apoptosis, increased synovium SDF-1 expression, and irregularly contoured subchondral bone. PTH-treated Prg4 mutant mice developed a secondary deposit overlaying the acellular layer of material lining the joint surfaces, but PTH-treatment did not alter signs of articular cartilage degeneration in Prg4 mutant mice. The increased joint SDF-1 levels and irregular subchondral bone found in Prg4 mutant mice introduce novel candidate mechanisms by which Prg4 protects articular cartilage. © 2012 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 31: 183–190, 2013" @default.
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- W2073960226 date "2012-08-15" @default.
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- W2073960226 title "Impact of proteoglycan-4 and parathyroid hormone on articular cartilage" @default.
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- W2073960226 doi "https://doi.org/10.1002/jor.22207" @default.
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