van der Kraan P M, Vitters E L, van den Berg W B
Department of Rheumatology, University Hospital Nijmegen, The Netherlands.
Ann Rheum Dis. 1992 May;51(5):643-7. doi: 10.1136/ard.51.5.643.
The effect of transforming growth factor beta (TGF beta) on proteoglycan synthesis and degradation in anatomically intact articular cartilage of murine patellae was studied. Exogenously added TGF beta up to a concentration of 200 pmol/l had no effect on proteoglycan synthesis in intact articular cartilage. Neutralisation of endogenously produced TGF beta with a specific monoclonal antibody to TGF beta, however, led to stimulation of proteoglycan synthesis, indicating that TGF beta itself inhibits proteoglycan synthesis in anatomically intact cartilage. Transforming growth factor beta decreased the degradation of proteoglycans in intact cartilage in the absence of fetal calf serum or insulin-like growth factor 1. In the presence of fetal calf serum or insulin-like growth factor 1, TGF beta had no additional effect on proteoglycan breakdown.
研究了转化生长因子β(TGF-β)对小鼠髌骨解剖结构完整的关节软骨中蛋白聚糖合成与降解的影响。外源性添加浓度高达200 pmol/l的TGF-β对完整关节软骨中的蛋白聚糖合成没有影响。然而,用针对TGF-β的特异性单克隆抗体中和内源性产生的TGF-β会导致蛋白聚糖合成受到刺激,这表明TGF-β本身在解剖结构完整的软骨中抑制蛋白聚糖合成。在没有胎牛血清或胰岛素样生长因子1的情况下,转化生长因子β降低了完整软骨中蛋白聚糖的降解。在存在胎牛血清或胰岛素样生长因子1的情况下,TGF-β对蛋白聚糖分解没有额外影响。