葛根이 좌골신경 손상 흰쥐의 후지 근육위축에 미치는 영향
Effect of Puerariae Radix on Hind Limb Muscle Atrophy of Sciatic Nerve Transectioned Rats
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초록
This study evaluated the effects of Puerariae Radix on the skeletal muscle atrophy. Muscle atrophy was induced by the sciatic nerve transection in Sprague-Dawley rats, then aqueous-extract of Puerariae Radix was administered for 12 days. Muscle wet weight was measured in soleus, plantaris, and medial gastrocnemius. Muscle fiber type was classified by MHCf immunohistochemistry. Muscle fiber type proportion and cross section area of muscle fiber also was observed in medial gastrocnemius. Bax and Bcl-2 expressions in medial gastrocnemius of the damaged hind limb were evaluated with immunohistochemistry. The results are as follows; Puerariae Radix attenuated muscle atrophy in soleus of the sciatic nerve transectioned rats, but there was statistic significance. Puerariae Radix attenuated significantly atrophy in plantaris at 12 days and in medial gastrocnemius at 8 days and 12 days. Puerariae Radix improved histology of the atrophic changes and increased significantly cross section areas of type-I and type-II muscle fibers in medial gastrocnemius of the sciatic nerve transectioned rats. Puerariae Radix did not affect to muscle fiber type proportion in medial gastrocnemius of the sciatic nerve transectioned rats. Puerariae Radix attenuated significantly Bax positive nuclei but did not affect to Bcl-2 positive muscle fibers in medial gastrocnemius of the sciatic nerve transectioned rats.According to above results, Puerariae Radix may have an anti-atrophy effect on the denervated skeletal muscle through anti-apoptotic effects on muscle fibers.
Abstract
This study evaluated the effects of Puerariae Radix on the skeletal muscle atrophy. Muscle atrophy was induced by the sciatic nerve transection in Sprague-Dawley rats, then aqueous-extract of Puerariae Radix was administered for 12 days. Muscle wet weight was measured in soleus, plantaris, and medial gastrocnemius. Muscle fiber type was classified by MHCf immunohistochemistry. Muscle fiber type proportion and cross section area of muscle fiber also was observed in medial gastrocnemius. Bax and Bcl-2 expressions in medial gastrocnemius of the damaged hind limb were evaluated with immunohistochemistry. The results are as follows; Puerariae Radix attenuated muscle atrophy in soleus of the sciatic nerve transectioned rats, but there was statistic significance. Puerariae Radix attenuated significantly atrophy in plantaris at 12 days and in medial gastrocnemius at 8 days and 12 days. Puerariae Radix improved histology of the atrophic changes and increased significantly cross section areas of type-I and type-II muscle fibers in medial gastrocnemius of the sciatic nerve transectioned rats. Puerariae Radix did not affect to muscle fiber type proportion in medial gastrocnemius of the sciatic nerve transectioned rats. Puerariae Radix attenuated significantly Bax positive nuclei but did not affect to Bcl-2 positive muscle fibers in medial gastrocnemius of the sciatic nerve transectioned rats.According to above results, Puerariae Radix may have an anti-atrophy effect on the denervated skeletal muscle through anti-apoptotic effects on muscle fibers.
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