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Kim, Jung-Eun,Kim, Eui-Hyun,Han, Eun-Hee,Park, Rang-Woon,Park, Il-Hyung,Jun, Soo-Han,Kim, Jung-Chul,Young, Marian F.,Kim, In-San 경북대학교 병원 2001 경북대학교병원의학연구소논문집 Vol.5 No.1
Melorheostosis is a rare bone disease characterized by linear hyperostosis and asscociated soft tissue adnormalities.The skin overlying the involved bone lesion is often tense, shiny, erythematous,and scleodermatous. In order to look for genes differentially expressed between the normal and involved skin, we cultured skin fibroblasts from the skin lesions of several afflicted patients and identified differentially expressed genes by reverse dot-blot hybridization. We found that the genes human TGF-β-induced gene product(βig-h3),osteoblast-specific factor2, osteonectin, fibronectin, and typeⅠcollagen were all downregulated in the affected skin fibroblast, with βig-h3 the most significantly affected.The expression of βig-h3 was induced by TGF-βin both affected and normal fibroblast.In an effort to determine the mechansim of bone and skin adnormalitied in melorheostosis, we made recombinant βig-h3. Both immobilized and soluble recombinant βig-h3 proteins with or without an RGD motif inhibited bone nodule formation of osteoblasts in vitro. Taken together,our results suggest that altered expression of several adhesion proteins may contribute to the development of hyperostosis and concomitant soft tissue adnormalities of melorheostosis, with βig-h3 in particular playing an important role in osteogenesis.J.cell.biochem.77:169-178,2000.