Cell Size and Succinate Dehydrogenase Activity of Different Types of Fibers in Different Regions of the Tibialis Anterior Muscle in Mice and Rats

概要

論文の詳細を見る
Cross-sectional areas(CSAs)and succinate dehydrogenase(SDH)activities of different types ef fibers in deep, middle, and superficial regions of the tibialis anterior muscle in mice and rats were deterrnned using quantitative histochemistry. In both mice and rats, mean CSAs of fibers were in the rank order of type lla<type llx<type llb, while mean SDH activities of fibers were in the rank order of type lla>type llx>type llb, irrespective of the muscle region. In mice, mean CSAs of the corresponding type of flbers were in the rank order of deep<middle<superficial, while there were no differences in the mean SDH activity of the fibers among the three muscle regiones. In rats, type lla and type llx fibers in the deep region had Smaller CSAs and higher SDH activities than the corresponding type of fibers in the middle region, while mean CSAs of type llb fibers were in the rank order of deep<middle=superficial and mean SDH activitles of the fibers were in the rank order of deep>middle=superficial. Muscle fibers in mice had smaller CSAs and higher SDH activities than the corresponding type of fibers in rats. These results indicate speciesspecific patterns and regional differences in the CSA and the SDH activity of fibers in the muscle even within the same fiber type defined by myosin heavy chain isoform expressions.
日本組織細胞化学会の論文