Collagen of articular cartilage.

Collagen of articular cartilage.
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DOI:
10.1186/ar380
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发表时间:
2002
期刊:
Arthritis research
影响因子:
--
通讯作者:
Eyre D
Eyre D
中科院分区:
其他
文献类型:
--
作者:
Eyre D

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成人关节软骨的细胞外支架和三分之二的干重是聚合胶原。II型胶原蛋白是哺乳动物中的主要分子组分,但胶原蛋白III、VI、IX、X、XI、XII和XIV都有助于成熟基质。在软骨发育中,核心纤维网络是胶原II、IX和XI的交联共聚物。胶原蛋白IX和XI在这种杂聚物中的功能尚未完全确定,但显然,它们是至关重要的,因为COLIX和COLXI基因的突变导致以早熟骨关节炎为特征的软骨发育不良表型。胶原蛋白XII和XIV也被认为与原纤维表面结合,但不共价连接。胶原VI聚合成其自身类型的丝状网络,其具有用于细胞和其它基质组分的多个粘附域。胶原蛋白X通常局限于关节软骨与骨交界处的钙化软骨薄层。
The extracellular framework and two-thirds of the dry mass of adult articular cartilage are polymeric collagen. Type II collagen is the principal molecular component in mammals, but collagens III, VI, IX, X, XI, XII and XIV all contribute to the mature matrix. In developing cartilage, the core fibrillar network is a cross-linked copolymer of collagens II, IX and XI. The functions of collagens IX and XI in this heteropolymer are not yet fully defined but, evidently, they are critically important since mutations in COLIX and COLXI genes result in chondrodysplasia phenotypes that feature precocious osteoarthritis. Collagens XII and XIV are thought also to be bound to fibril surfaces but not covalently attached. Collagen VI polymerizes into its own type of filamentous network that has multiple adhesion domains for cells and other matrix components. Collagen X is normally restricted to the thin layer of calcified cartilage that interfaces articular cartilage with bone.
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