Poole A R, Pidoux I
Joint Diseases Laboratory, Shriners Hospital for Crippled Children, Montreal, Quebec, Canada.
J Cell Biol. 1989 Nov;109(5):2547-54. doi: 10.1083/jcb.109.5.2547.
Immunofluorescence and immunoelectron microscopy were used in conjunction with a monoclonal antibody to investigate the localization of type X collagen in the proximal tibial growth plate of 7-d-old chicks. This molecule was detected throughout the hypertrophic zone first appearing when chondrocytes exhibited hypertrophy: it was absent from the proliferative zone. Type X collagen was primarily associated with type II collagen fibrils as demonstrated by immunogold staining. Type X collagen was not concentrated in the focal calcification sites nor was it associated with matrix vesicles. These observations suggest that type X collagen may play a role other than that directly related to the nucleation of calcification.
免疫荧光和免疫电子显微镜技术结合单克隆抗体,用于研究X型胶原蛋白在7日龄雏鸡胫骨近端生长板中的定位。当软骨细胞出现肥大时,在整个肥大区均可检测到该分子,而增殖区则未检测到。免疫金染色显示,X型胶原蛋白主要与II型胶原纤维相关。X型胶原蛋白并不集中在局灶性钙化部位,也不与基质小泡相关。这些观察结果表明,X型胶原蛋白可能发挥着与钙化成核直接相关作用以外的其他作用。