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Journal of Dental Research
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Biological

Effects of TGF-β on Hyaluronan Anabolism in Fibroblasts Derived from the Synovial Membrane of the Rabbit Temporomandibular Joint

K. Tanimoto*, A. Suzuki, S. Ohno, K. Honda, N. Tanaka, T. Doi, K. Yoneno, M. Ohno-Nakahara, Y. Nakatani, M. Ueki and K. Tanne

Department of Orthodontics and Craniofacial Developmental Biology, Hiroshima University Graduate School of Biomedical Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan;

Correspondence: * corresponding author, tkotaro{at}hiroshima-u.ac.jp

Hyaluronan (HA) synthesis in the synovial membrane is affected by various chemical mediators. It is hypothesized that transforming growth factor-beta1 (TGF-β1) would be a mediator to modulate HA synthesis in cultured synovial membrane fibroblasts of the temporomandibular joint (TMJ). Fibroblasts were extracted from the TMJ synovial membrane of four-week-old Japanese white rabbits. The amount of HA and expression levels of HA synthase (HAS) mRNAs induced by TGF-β1 treatment were analyzed by means of high-performance liquid chromatography and real-time polymerase chain-reaction, respectively. Both medium and large amounts of HA were enhanced by the stimulation of TGF-β1. HAS2 mRNA expression was enhanced 13-fold after six-hour stimulation with TGF-β1 (10 ng/mL), whereas HAS3 mRNA expression was not changed significantly. These results suggest that TGF-β1 enhances the expression of HAS2 mRNA in the TMJ synovial membrane fibroblasts and may contribute to the production of high-molecular-weight HA in the joint fluid.

Key Words: hyaluronan • HAS • synovial membrane • TMJ • transforming growth factor

Journal of Dental Research, Vol. 83, No. 1, 40-44 (2004)
DOI: 10.1177/154405910408300108
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