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Effects of Deer Antler on the Regeneration of Peripheral Nerves; About Sprout Formation of Experimentally Transected Sciatic Nerves in Rat  

Chang, Byung-Joon (College of Veterinary Medicine, Konkuk University)
Cho, Ik-Hyun (College of Veterinary Medicine, Konkuk University)
Choi, Hye-Young (College of Veterinary Medicine, Konkuk University)
Won, Hui-Young (College of Veterinary Medicine, Konkuk University)
Park, Chang-Hyun (Electron Microscope Laboratory, College of Medicine, Korea University)
Bae, Chun-Sik (College of Veterinary Medicine, Chonnam National University)
Choe, Nong-Hoon (College of Veterinary Medicine, Konkuk University)
Publication Information
Applied Microscopy / v.32, no.1, 2002 , pp. 67-80 More about this Journal
Abstract
This study was carried out to investigate the effects of deer antler extract on the regeneration of peripheral nerves. Sprague-Dawley male rats weighing about 300 gm were fed deer antler extract for 1, 2, and 3 weeks per oral (1.5 ml/100 gm B.W.), respectively, once a day and transected both sides of sciatic nerve of each leg. After keeping for 6 hours, sciatic nerves taken from proximal part of transected region were treated with conventional transmission electron microscopical method and then observed with electron microscope. The results obtained were summarized as follows; 1. Sciatic nerves of normal control group were not showing any sprouts and electron dense axolemmal projections were frequently observed. 2. Sciatic nerves of saline treated groups were showing axonal sprouts at the nodes of Ranvier. The length of them was usually short, and numerous vesicles, vacuoles and organelles including neurofilament were contained. The number of nodes of Ranvier containing sprouts from 100 longitudinal sectioned nerve fibers was 29 (29%) in 1 week treated group, 32 (32%) in 2 weeks treated group, and 30 (30%) in 3 weeks treated group, respectively. 3. Sciatic nerves of deer antler treated groups were showing axonal sprouts at the node of Ranvier as well. Although most of the sprouts were short, some sprouts of 2 weeks and 3 weeks treated groups were quite long. Sprouts usually contained numerous vesicles, vacuoles and cell organelles such as neurofilaments and mitochondria. The number of nodes of Ranvier containing sprouts from 100 longitudinal sectioned nerve fibers was 38 (38%) in 1 week treated group, 46 (46%) in 2 weeks treated group, and 48 (48%) in 3 weeks treated group respectively. The results described above explain pretreatment of deer antler extract improves the sprout formation of transected sciatic nerves, and then it suggests deer antler may be effective for the regeneration of peripheral nerves.
Keywords
Deer antler extract; Sciatic nerve; Sprouting;
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