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Systemic hypoxia alters gene expression levels of structural proteins and growth factors in knee joint cartilage. | LitMetric

Systemic hypoxia alters gene expression levels of structural proteins and growth factors in knee joint cartilage.

Biochem Biophys Res Commun

Laboratory for Skeletal Disorders and Rehabilitation, Children's Hospital, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02215, USA.

Published: May 2005

AI Article Synopsis

Article Abstract

We investigated the effects of short- (8- and 24-h) and long-term (3 weeks) exposure to systemic normobaric hypoxia (13%) on the gene expression level of structural proteins and growth factors in knee joint cartilage of rabbits. Collagen type Ia2, II, and Va1, TGF-beta1, and b-FGF were upregulated after short-term hypoxia in both menisci, but not in articular cartilage. In contrast, long-term hypoxia downregulated gene expression level of collagens, aggrecan, and growth factors in articular cartilage and meniscal fibrocartilage. Interestingly, gene expression levels of non-collagenous proteins biglycan, decorin, and versican were not affected by short-term or by long-term hypoxia in knee joint cartilage. The present study suggests that changes in oxygen level differentially affect gene expression levels of growth factors, collagens, and non-collagenous proteins in normal knee joint cartilage in rabbits.

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Source
http://dx.doi.org/10.1016/j.bbrc.2005.02.168DOI Listing

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