耐力训练后脊髓前角细胞线粒体的电镜定量研究

Quantitative Electron Microscopy of Spinal Ventral Horn in Rats after Endurance Training

观察了游泳耐力训练后大鼠脊髓前角外侧群细胞的超微结构变化，发现此群运动神经元线粒体的数量明显地增多，嵴致密，基质电子密度增高。但未见线粒体肿胀、嵴断裂和空泡化等变性现象。用体视学方法测量了线粒体的数密度和比表面。训练组和对照组大鼠前角细胞线粒体的数密度分别为０．６７５±０．１９个／μｍ~３和０．４４５±０．０４个／μｍ~３（Ｐ＜０．０５），比表面分别为６．３５±０．１７μｍ~２μｍ^（－３）和６．６４±０．１８μｍ~２μｍ^（－３）（Ｐ＜０．０２）。据此提出，耐力训练可引起前角细胞的超微结构变化。

Ultrastructural changes of spinal latero-ventral horn cells were observed by electron microscopy after swimming training.Meanwhile the numerical density(Nv)and the specific surface(δ)of mitochondria were also measured. Comparing to the control group,there was an increase in the number,cristae and electronic matrix density of mitochondria.The Nv. of mitochondria was increased(from 0.445±0.04 to 0.675±0.19,P<0.05),but the specific surface of mitochondria was decreased(from 6.64±0.18 to 6.35±0.17,P<0.02),It was concluded that endurance training caused ultrastructural changes of spinal ventral horn cells.