Demonstration of receptors specific for connective tissue growth factor on a human chondrocytic cell line (HCS-2/8)

被引:98
作者
Nishida, T
Nakanishi, T
Shimo, T
Asano, M
Hattori, T
Tamatani, T
Tezuka, K
Takigawa, M [1 ]
机构
[1] Okayama Univ, Sch Dent, Dept Biochem & Mol Dent, Okayama 7008525, Japan
[2] Japan Tobacco Inc, Pharmaceut Frontier Res Labs, Yokohama, Kanagawa 2360004, Japan
关键词
D O I
10.1006/bbrc.1998.8895
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
The presence of receptors specific for connective tissue growth factor (CTGF) was demonstrated on a human chondrosarcoma-derived chondrocytic cell Line, HCS-2/8. The binding of I-125-labeIed recombinant CTGF to HCS-2/8 cells was inhibited by unlabeled CTGF but not by PDGF-BB or bFGF. Scatchard analysis revealed the presence of two classes of binding sites with Rd values of 18.6 and 259 nM on cells. A cross-linking study revealed the formation of I-12S-CTGF-receptor complex with an apparent molecular weight of 280 kDa, The I-125-CTGF-receptor complex disappeared almost completely on the addition of unlabeled CTGF but not PDGF-BB or bFGF, In addition, the I-125-CTGF-receptor complex was immunoprecipitated with anti-CTGF antiserum but not with anti-PDGF receptor antiserum. These findings suggest that CTGF directly binds to specific receptor molecules on HCS-2/8 cells. (C) 1998 Academic Press.
引用
收藏
页码:905 / 909
页数:5
相关论文
共 23 条