Changes of macromolecular organizations in nonjunctional sarcolemmas after cross-innervation──a study offast-and slow-twitch muscle fibres in rats  

作　　者：LU JIANLI TIEFENG ZHANG FUJIN QU BEIHUA QIAN SHIKAI HUANG(Shanghai Institute of Physiology, Chinesc Academy of Scicnces, 320 Yue-Yang Road, Shanghai 200031, China) 

出　　处：《Cell Research》1995年第2期143-154,共12页细胞研究（英文版）

摘　　要：The purpose of the present study was to analyse the changes of macromolecular organizations in nonjunctional sarcolemmas of different types of skeletal muscle fibres after cross-innervation. In normal rats the mean density of square arrays (6 nm particles organized in orthogonal arrays) was 9.02/μm2 for the nonjunctional sarcolemmas of fast-twitch extensor digitorum longus (control EDL,CE) nuscle fibres and 0.34/μm2 for the nonjunctional sarcolemmas of slow-twitch soleus (control SOL, CS) muscle fibres. After cross-innervation between the fast-twitch EDL and slow-twitch SOL muscle fibres by slow and fast muscle merves respectively for three months, the mean density was 0.45/μm2 for the nonjunetional sarcolemmas of the operated-EDL (OE) and 8.3/μm2 for the nonjunctional sarcolemmas of the operated SOL (OS). This indicates that the cross-innervation causes a reciprocal transformation of the number and distribution of such macromolecular organizations in the electrically excitable nonjunctional sarcolemmas.

关 键 词：SARCOLEMMA square array cross-innervation freeze-fracturing rat(Wistar) 

分 类 号：Q593.3[生物学—生物化学]