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    J Orthop Res. 2005 Sep;23(5):1139-45.

    Expression and activation of peroxisome proliferator-activated receptors in growth plate chondrocytes.

    Shao YY, Wang L, Hicks DG, Tarr S, Ballock RT.

    Departments of Orthopaedic Surgery and Biomedical Engineering, Orthopaedic Research Center, The Cleveland Clinic Foundation, Cleveland, OH 44195, USA.

    Peroxisome proliferator-activated receptor gamma (PPAR-gamma) is a nuclear hormone receptor that is involved in a wide range of cellular processes. Although it is known that PPAR-gamma plays an important role in cell cycle control, inflammation, apoptotic cell death, and other cellular processes, the role of PPAR-gamma in the normal and pathological function of growth plate chondrocytes has not been investigated. The purpose of this study was to determine if PPARs are expressed in growth plate chondrocytes and to describe the biological effect of PPAR activation in these cells. The results demonstrate the presence of three PPAR isoforms (alpha, delta, and gamma) in growth plate cartilage. Activation of PPAR-gamma by ciglitazone in growth plate chondrocytes inhibits T(3) induced terminal differentiation and promotes apoptosis through increased levels of caspase 3/7 activity and decreased expression of the anti-apoptotic protein Bcl-2.

    PMID: 15878253 [PubMed - indexed for MEDLINE]

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