动物医学进展2006，Vol.27Issue(2)：49-57,9.
大鼠与家兔生后发育期趾浅屈肌纤维间的比较
The Comparison of Digitorum Superficialis Flexor Muscle Fibers Between Rats and Rabbits During Postnatal Development
朱道立1
作者信息
- 1. 南通大学生命科学学院,江苏南通,226007
- 折叠
摘要
Abstract
The distribution of muscle fibers classified on the basis of their content of different myosin heavy chain (MHC) isoforms was analysed in muscle samples from the digitorum superficialis flexor muscles of postnatal different ages of rats and rabbits by correlating standard actomyosin ATPase and succinic dehydrogenase SDHase histochemistry.The percentage of type Ⅰ,ⅡⅩ fibers of rats and rabbits decreased whereas that for type ⅡA,ⅡB fibers increased from postnatal 2-week to 24-week old.The histochemical characterization of larger number of single fibers was compared and correlated on a fiber-to-fiber basis.The results showed that the mean body weight and the average wet weight of the digitorum superficialis flexor muscles were gradually increased with postnatal development.Type Ⅰ,ⅡⅩ,ⅡA and ⅡB fibers were found in all muscles of different groups except 2 days.Mean fiber type compositions of type ⅡB fiber of male rats and rabbits were larger than that of female rats and rabbits during postnatal development.Three oxidative histochemically-classified fiber compositions of type Ⅰ,ⅡⅩ,ⅡA fiber in male rats and rabbits were smaller than that of female.The mean transverse-sectional areas of type Ⅰ, ⅡⅩ, ⅡA and ⅡB fiber in rats were significantly smaller than those of rabbits. There were evident sexual distinction of rats and rabbits.In rats and rabbits,Type ⅡⅩ fiber had the smallest cross-sectional area.Type Ⅰ, ⅡA fibers had the intermediate area and type ⅡB fibers had the largest. This has important implications in attempts to study the physiological properties of fast fiber types adequately in rodents.关键词
肌纤维/啮齿动物/生后发育/组织化学Key words
muscular fiber/rodent/postnatal development/histochemistry分类
农业科技引用本文复制引用
朱道立..大鼠与家兔生后发育期趾浅屈肌纤维间的比较[J].动物医学进展,2006,27(2):49-57,9.
