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  • Title: Up-regulation of putative hyaluronan synthase mRNA by basic fibroblast growth factor and insulin-like growth factor-1 in human skin fibroblasts.
    Author: Kuroda K, Utani A, Hamasaki Y, Shinkai H.
    Journal: J Dermatol Sci; 2001 Jun; 26(2):156-60. PubMed ID: 11378333.
    Abstract:
    Recently, cDNAs for the three putative human hyaluronan synthase (HAS) genes, HAS1, HAS2 and HAS3, have been cloned. In this study we investigated the effects of basic fibroblast growth factor (bFGF) and insulin-like growth factor-1 (IGF-1) on the expression of HAS genes in cultured skin fibroblasts. Northern blot analyses showed that treatment of fibroblasts with bFGF enhanced the mRNA levels of all three genes. HAS2 gene expression showed the strongest up-regulation with a more than 10-fold increase at 50 ng/ml of bFGF. bFGF also increased hyaluronan production. Incubation of fibroblasts with IGF-1 increased HAS1, HAS2, and HAS3 mRNA levels, as well as hyaluronan production. Our results suggest that up-regulation of the HAS genes by bFGF and IGF-1 is closely associated with the stimulation of hyaluronan synthesis, and that effects of growth factors on HAS gene expression may have important implications for tissue remodeling, such as in development and wound healing.
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