Effect of type II collagen in chondrocyte response to TGF-beta 1 regulation.
Effect of type II collagen in chondrocyte response to TGF-beta 1 regulation.
复制标题
II 型胶原蛋白对软骨细胞对 TGF-β1 调节反应的影响。
DOI:
10.1006/excr.1998.4032
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发表时间:
1998
期刊:
影响因子:
--
通讯作者:
Scully,SP
中科院分区:
文献类型:
--
作者:
Qi,WN;Scully,SP
Thein vivorole of the extracellular matrix and the manner in which it interfaces with soluble regulators remains unknown. This study reports the modulation by extracellular type II collagen of TGF-β1-stimulated DNA synthesis, proteoglycan synthesis, and mRNA expression for α1(II) procollagen and aggrecan core protein in the adult articular chondrocyte. Bovine chondrocytes were isolated and resuspended in alginate beads which contained increasing amounts of type II collagen from 0 to 1.5% (w/v). Cultures were maintained for 7 days in basal, DMEM, TGF-β1 (10 ng/ml), or FBS (10%) supplemented medium. DNA and proteoglycan synthesis were determined by radiotracer incorporation. The relative amounts of mRNA were analyzed by Northern blot analysis. Exogenous collagen increased DNA synthesis in all culture conditions beginning at concentrations of 0.75% (w/v). We observed that extracellular type II collagen augments both TGF-β1 stimulated increases of aggrecan gene expression up to 400% and α1(II) procollagen gene expression up to 180% in a dose-dependent fashion. This is distinct from cultures which were either basal or FBS supplemented medium which lacked a dose-dependent change in aggrecan gene expression and demonstrated a decrease in α1(II) procollagen gene expression. Exogenous collagen above 0.75% (w/v) increased proteoglycan synthesis significantly in FBS and TGF-β1-stimulated cultures but not in basal cultures. We have demonstrated that the alterations in gene expression that occur in response to TGF-β1 are modulated by extracellular type II collagen. This modulation is possible through both transcriptional and posttranscriptional regulatory mechanisms.
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影响因子:
7.8
作者:
Gibson, G J;Schor, S L;Grant, M E
通讯作者:
Grant, M E
影响因子:
4.8
作者:
I. D. Dinbergs;L. Brown;E. Edelman
通讯作者:
E. Edelman
影响因子:
4.1
作者:
Gary J. Gibson;T. C. M. Kielty;Clare Garner;Seth L. SCHORt;M. E. Grant
通讯作者:
M. E. Grant
DOI:
10.2106/00004623-199302000-00004
发表时间:
1993
期刊:
The Journal of bone and joint surgery. American volume
影响因子:
--
作者:
Trippel,SB;Wroblewski,J;Makower,AM;Whelan,MC;Schoenfeld,D;Doctrow,SR
通讯作者:
Doctrow,SR
影响因子:
--
作者:
S. Trippel
通讯作者:
S. Trippel