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Age-related effects of TGF-β on proteoglycan synthesis in equine articular cartilage
被引:40
|作者:
Iqbal, J
[1
]
Dudhia, J
[1
]
Bird, JLE
[1
]
Bayliss, MT
[1
]
机构:
[1] Univ London Royal Vet Coll, Dept Vet Basic Sci & Farm Anim & Equine Med & Sur, London NW1 0TU, England
关键词:
cartilage;
TGF-beta;
proteoglycan;
mRNA;
D O I:
10.1006/bbrc.2000.3167
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 synthesis of proteoglycans was measured in normal equine articular cartilage of ages 9 months to 20 years and the effect of TGF-beta 1 on this activity was investigated. The rate of incorporation of [S-35]Na2SO4 decreased with age as did the responsiveness of the tissue to the growth factor. The enhanced synthesis of proteoglycan induced at all ages by TGF-beta 1 was down-regulated by IL-1 beta and retinoic acid. The expression of mRNA for TGF-beta 1, 2, and 3 was also measured, and although the level of TGF-beta 1 was highest at all ages, the expression of each growth factor decreased with age. (C) 2000 Academic Press.
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页码:467 / 471
页数:5
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