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Journal of the Korean Academy of Rehabilitation Medicine 1999;23(3):449-454.
Protective Effect of Melatonin on Neuropathy in Streptozotocin-Induced Diabetic Rats.
Kim, Myeong Ok , Jung, Han Young , Paik, Kyung Woo , Lee, Jun Ki
Department of Rehabilitation Medicine, Inha University College of Medicine.
스트렙토조토신-유발 당뇨병 백서에서 멜라토닌의 신경병증 방어 효과
김명옥, 정한영, 백경우, 이준기
인하대학교 의과대학 재활의학교실

The purpose of this study is to prove protective action of melatonin on the development of neuropathy in diabetic rat.

The experimental rats (Sprague-Dawley) were divided into 3 groups: Group 1, streptozotocin-induced diabetic rats with trial of melatonin; Group 2, streptozotocin-induced diabetic rats without trial of melatonin; Group 3, normal control. Streptozotocin was injected intraperitoneally in group 1 and 2. Melatonin was administered per orally in group 1 from 1 week after the injection of streptozotocin. The melatonin effect on diabetic neuropathy was evaluated by the measurement of conduction velocities and amplitudes of rat tail mixed nerve action potentials. The electrophysiologic examinations were performed before and 2, 4, and 6 weeks after administration of streptozotocin.

The rat tail mixed nerve conduction velocities were decreased at 4 weeks in group 1 and 2, and showed significant improvement at 6 weeks in group 1 as compared with those of group 2 (p<0.05). The amplitudes of the compound nerve action potentials did not show difference before and after streptozotocin and melatonin trials, neither among groups.

In this experimental study, we observed the inhibitory effect of melatonin on the progression of polyneuropathy in early stage of diabetic rat. For the clinical application to human beings, further study is required.

Key Words: Melatonin, Streptozotocin-induced polyneuropathy, Rat, Conduction velocity, Diabetes mellitus


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