Enhanced sulfated‐proteoglycan core protein synthesis by incubation of rabbit chondrocytes with recombinant transforming growth factor‐β1

Enhanced sulfated‐proteoglycan core protein synthesis by incubation of rabbit chondrocytes with recombinant transforming growth factor‐β1
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通过用重组转化生长因子-β1孵育兔软骨细胞增强硫酸化蛋白聚糖核心蛋白合成

DOI:
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发表时间:
1991
影响因子:
5.6
通讯作者:
A. Purchio
A. Purchio
中科院分区:
生物学2区
文献类型:
--
作者:
C. Malemud;Wendy Killeen;T. Hering;A. Purchio

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将兔关节软骨细胞与重组转化生长因子-β 1 (rhTGF-β1) 一起孵育,并测量其对新合成的蛋白多糖的影响。 rhTGF-β1 在低至 5 ng/ml 的浓度下刺激蛋白多糖合成,而放射性硫酸盐的掺入不会进一步增加至 50 ng/ml。 rh-TGF-β1处理的软骨细胞中放射性硫酸盐掺入的数量增加在细胞相关培养室中比在培养基室中更大。 rhTGF-β1 促进细胞相关区室中蛋白聚糖保留的增加,如 t 1/2 保留从 8 小时增加到 11 小时所证明的那样。在 rh-TGF-β1 处理的软骨细胞中观察到 [35S]-蛋氨酸标记的核心蛋白的合成特异性增强。 rh-TGF-β1 增加了源自流体动力学大蛋白聚糖的 2 种核心蛋白的合成。 3-5% 丙烯酰胺凝胶电泳后,它们的表观分子量分别为 > 480 kD 和 390 kD。隔室分析显示,细胞相关培养隔室仅包含源自大蛋白聚糖的 2 个核心蛋白中较大的一个。另外两种表观分子量分别为 52 kD 和 46 kD 的核心蛋白也受到 rhTGF-β1 的刺激。这些结果表明,TGF-β可能在刺激关节软骨细胞蛋白聚糖核心蛋白合成中发挥重要作用,因此可能是损伤后软骨细胞外基质恢复的重要生长因子。
Rabbit articular chondrocytes were incubated with recombinant transforming‐growth‐factor‐β 1, (rhTGF‐β1) and its effect on newly synthesized proteoglycan measured. rhTGF‐β1 stimulated proteoglycan synthesis at a concentration as low as 5 ng/ml without further increase in radiosulfate incorporation up to 50 ng/ml. The quantitative increase in radiosulfate incorporation in rh‐TGF‐β1‐treated chondrocytes was greater in the cell‐associated culture compartment than in the medium compartment. rhTGF‐β1 promoted an increased proteoglycan retention in the cell‐associated compartment as evidenced by an increase in the t 1/2 retention from 8 h to 11 h. Specific enhanced synthesis of [35S]‐methionine‐labeled core proteins was seen in rh‐TGF‐β1‐treated chondrocytes. rh‐TGF‐β1 increased the synthesis of the 2 core proteins derived from hydrodynamically large proteoglycans. They possessed apparent molecular weights of > 480 kD and 390 kD after 3‐5% acrylamide gel electrophoresis. A compartmental analysis revealed that the cell‐associated culture compartment contained only the larger of the 2 core proteins derived from large proteoglycans. Two other core proteins with apparent molecular weights 52 kD and 46 kD were also stimulated by rhTGF‐β1. These results indicated that TGF‐β probably plays a significant role in stimulating proteoglycan core protein synthesis in articular chondrocytes and therefore may be an important growth factor in the restoration of cartilage extracellular matrix after injury.
从 cDNA 克隆推导出的大鼠软骨蛋白多糖核心蛋白的完整一级结构。
DOI: --
发表时间: 1987
期刊: The Journal of biological chemistry
影响因子: --
作者:
Doege,K;Sasaki,M;Horigan,E;Hassell,JR;Yamada,Y
通讯作者: Yamada,Y
软骨硫酸软骨素蛋白多糖的生物合成前体。
DOI: 10.1016/s0174-173x(87)80021-3
发表时间: 1987
期刊: Collagen and related research
影响因子: --
作者:
Vertel,BM;Hitti,Y
通讯作者: Hitti,Y
DOI: --
发表时间: 1990
影响因子: 19.6
作者:
W. A. Border;Seiya Okuda;R. Languino;E. Ruoslahti
通讯作者: W. A. Border;Seiya Okuda;R. Languino;E. Ruoslahti
DOI: --
发表时间: 1986-03
期刊: The Journal of biological chemistry
影响因子: --
作者:
R. Ignotz;J. Massagué
通讯作者: R. Ignotz;J. Massagué
软骨细胞生物合成小蛋白多糖 II(核心蛋白聚糖)和 procore 蛋白的证据。
DOI: --
发表时间: 1991
期刊: The Journal of biological chemistry
影响因子: --
作者:
Sawhney,RS;Hering,TM;Sandell,LJ
通讯作者: Sandell,LJ