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IL-6 and its soluble receptor augment aggrecanase-mediated proteoglycan catabolism in articular cartilage

Flannery, Carl R., Little, Chris B., Hughes, Clare Elizabeth, Curtis, Clare L., Caterson, Bruce and Jones, Simon A. 2000. IL-6 and its soluble receptor augment aggrecanase-mediated proteoglycan catabolism in articular cartilage. Matrix biology 19 (6) , pp. 549-553. 10.1016/S0945-053X(00)00111-6

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Abstract

Elevated concentrations of interleukin-6 (IL-6) and soluble IL-6 receptor (sIL-6R) in the synovial fluids and serum of patients with arthritis have been implicated in the joint tissue destruction associated with these conditions, however studies conducted to date on the role and effects of IL-6 in the process of cartilage proteoglycan (aggrecan) catabolism are disparate. In the present study, bovine articular cartilage explants were maintained in a model organ culture system in the presence or absence of IL-1α or TNF-α, and under co-stimulation with or without IL-6 and/or sIL-6R. After measuring proteoglycan loss from the explants, the proteolytic activity and expression profiles of aggrecanase(s) was assessed for each culture condition. Stimulation of cartilage explants with IL-6 and/or sIL-6R potentiated aggrecan catabolism and release above that seen in the presence of IL-1α or TNF-α alone. This catabolism was associated with aggrecanase (but not MMP) activity, with correlative mRNA expression for aggrecanase-2.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Publisher: Elsevier
ISSN: 0945-053X
Last Modified: 04 Jun 2017 06:39
URI: http://orca-mwe.cf.ac.uk/id/eprint/63317

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