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矿化火鸡腿部肌腱的三维分析：基质小泡与胶原蛋白的关系

Three-dimensional analysis of mineralizing turkey leg tendon: matrix vesicle-collagen relationships.

作者信息

Kohler D M, Crenshaw M A, Arsenault A L

机构信息

Department of Pathology, McMaster University, Hamilton, Ontario, Canada.

出版信息

Matrix Biol. 1995 Jul;14(7):543-52. doi: 10.1016/s0945-053x(05)80003-4.

DOI:10.1016/s0945-053x(05)80003-4

Abstract

The spatial and temporal relationships of mineral deposition between matrix vesicles and type I collagen fibrils have been studied in the turkey leg tendon by electron microscopy of cross sections and serial longitudinal thin sections and by electron tomography of longitudinal thick sections. Serial sectioning and electron tomography allow three-dimensional analysis of spatial relationships, overcoming the problems of missing depth information and over-projection of adjacent structures which exist for two-dimensional projections of isolated sections. These techniques reveal that while mineral deposits within matrix vesicles are found remote from calcifying collagen fibrils, the reverse relationship does not occur; all collagen-associated mineral can ultimately be linked to mineral-laden vesicles. These results suggest a temporal sequence of calcification beginning in matrix vesicles and spreading to adjacent collagen fibrils.

摘要

通过对横断面和连续纵向薄片进行电子显微镜观察以及对纵向厚片进行电子断层扫描，研究了火鸡腿部肌腱中基质小泡与I型胶原纤维之间矿物质沉积的时空关系。连续切片和电子断层扫描能够对空间关系进行三维分析，克服了孤立切片二维投影中存在的深度信息缺失和相邻结构过度投影的问题。这些技术表明，虽然在基质小泡内发现的矿物质沉积远离正在钙化的胶原纤维，但相反的关系并不存在；所有与胶原相关的矿物质最终都可与载有矿物质的小泡相联系。这些结果提示了一个从基质小泡开始并扩散到相邻胶原纤维的钙化时间序列。