大鼠胫神经损伤腓肠肌组织中Myostatin的表达变化

目的：分析myostatin（MSTN）在大鼠胫神经夹伤后腓肠肌失神经萎缩与神经再支配过程中的表达变化，探讨myostatin在失神经肌萎缩过程中的可能作用。方法：建立大鼠胫神经夹伤模型；采用RT—PCR法检测失神经与神经再支配不同时FB3段腓肠肌中myostatin mRNA含量。结果：失神经支配早期，腓肠肌myostatin mRNA水平迅速上升，在第2周达到高峰，随后表达又逐渐下降，至第4周与正常组相比差异无统计学意义（P〉0．05）。结论：成功建立大鼠胫神经夹伤模型，腓肠肌失神经肌萎缩过程中，myostatin基因表达有明显变化．提示myostatin在失神经肌萎缩过程中扮演重要角色。

Expression of myostatin in rat gastrocnemius during denervation of tibial

Objective:To investigate myostatin(MSTN) expression pattern and its potential role in atrophic gastrocnemius during denervation and reinnervation. Methods: The model of rat tibial nerve crush was successfully established and myostatin mRNA levels in atrophic gastrocnemius were detected by RT-PCR. Results: The results showed that in the early stage of denervation, the level of myostatin mRNA in the denervated gastrocnemius muscle increased instantly, reaching a peak during the second week after being crushed, and then returned to its normal level gradually until the 4th week after the tibial nerve was crushed(P>0.05). Conclusions: The model of rat tibial nerve crush was successfully established. There is a significant change of the myostatin gene in the denervated gastrocnemius muscle after being crushed, which indicats that myostatin may play a significant role in muscle atrophy after denervation.