Induction of subcutaneous tissue fibrosis in newborn mice by transforming growth factor beta - Simultaneous application with basic fibroblast growth factor causes persistent fibrosis

被引:71
作者
Shinozaki, M
Kawara, S
Hayashi, N
Kakinuma, T
机构
[1] UNIV TOKYO,SCH MED,DEPT DERMATOL,BUNKYO KU,TOKYO 113,JAPAN
[2] KANTO TEISHIN HOSP,DEPT DERMATOL,SHINAGAWA KU,TOKYO 141,JAPAN
关键词
D O I
10.1006/bbrc.1997.7134
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
To establish an appropriate animal model of skin fibrosis by exogenous application of growth factors, we investigated the in vivo effects of transforming growth factor-beta by injection into subcutaneous tissue of newborn mice. Histological examination revealed that TGF-beta 1, beta 2, and beta 3 induced granulation tissue formation after 3 days of injection, while these changes had disappeared after 7 days. The changes after 3 days of injection were more pronounced in the tissue injected with TGF-beta 2 or beta 3 than that with TGF-beta 1. In situ hybridization analysis indicated that connective tissue growth factor mRNA was strongly expressed in the fibroblasts at the site of TGF-beta injection, which suggested that fibroblasts were activated by TGF-beta. Next, we investigated the cooperative effects of TGF-beta and other growth factors including basic fibroblast growth factor (bFGF). The simultaneous application of TGF-beta and bFGF caused apparent tissue fibrosis which persisted for at least 2 weeks, while bFGF alone caused slight fibrotic changes after 7 days of injection. Thus, we succeeded in establishing an animal model of skin fibrotic disorders by the exogenous addition of growth factors, and this animal model will be useful for future studies in this area. (C) 1997 Academic Press.
引用
收藏
页码:292 / 296
页数:5
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