[大鼠尾部腱鞘胶原纤维的超微结构研究]

[Ultrastructural findings on collagen fibers of tendon sheaths from the rat tail].

作者信息

Leonardi L, Strocchi R, Castellani P P, Guizzardi S, Ottani V

出版信息

Boll Soc Ital Biol Sper. 1982 Nov 30;58(22):1478-84.

Abstract

Rat tail tendon sheaths have been studied by electron microscopy and freeze-etching techniques. Pictures from thin sections have shown the presence of three different sheaths: a) a sheath commun to all tendons, (paratenon) formed by collagen fibrils differently orientated with a variable diameter (20nm 200nm) b) a specific sheath for every tendon, (peritenoneum) which is composed by different layers: the external ones present collagen fibrils of wide and variable diameter (20nm-200nm). The internal ones present collagen fibrils of uniform and small diameter (50nm-60nm). Between these fibres layers, there is evidence for the presence of fibrocits forming continuous cellular layers. c) a sheath surrounding tendon fascicles, (endotenoneum) formed by small and uniform collagen fibrils and a continuous cellular layers. Replicas of freeze-fractured collagen fibrils having a variable diameter show a straight arrangement of their microfibrils.

摘要

已通过电子显微镜和冷冻蚀刻技术对大鼠尾肌腱鞘进行了研究。薄切片的图片显示存在三种不同的鞘：a）所有肌腱共有的鞘（腱旁组织），由直径可变（20纳米至200纳米）、取向不同的胶原纤维形成；b）每条肌腱的特定鞘（腱膜），由不同层组成：外层有宽且直径可变（20纳米至200纳米）的胶原纤维。内层有均匀且直径小（50纳米至60纳米）的胶原纤维。在这些纤维层之间，有证据表明存在形成连续细胞层的成纤维细胞。c）围绕肌腱束的鞘（腱内膜），由细小且均匀的胶原纤维和连续的细胞层形成。具有可变直径的冷冻断裂胶原纤维的复制品显示其微纤维呈直线排列。