The Involvement of Aldose Reductase in Alterations to Neurotrophin Receptors and Neuronal Cytoskeletal Protein mRNA Levels in the Dorsal Root Ganglion of Streptozotocin-Induced Diabetic Rats
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概要
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Dorsal root ganglia (DRG) are recognized as one of the organs which are damaged in peripheral sensory diabetic neuropathy. In an experimental animal model, the alteration of the mRNA expression level of neurotrophins, their receptors and neuronal cytoskeletal protein have been reported. In this study, we examined whether these changes are improved by treatment with the aldose reductase inhibitor, zenarestat, in early-stage diabetic neuropathy of streptozotocin (STZ)-induced diabetic rats. Two weeks after the induction of diabetes mellitus by STZ treatment, zenarestat or a vehicle were given orally for two weeks. After the zenarestat treatment, the mRNA expression levels of neurotrophin receptors and neuronal cytoskeletal proteins in dorsal root ganglia were determined with a real-time polymerase chain reaction (PCR) method. Compared with the expression level of normal rats, a significant increase in Trk-C and Tα1 α-tubulin and a decrease in neurofilament H mRNA expression level were observed in the DRG of STZ rats, while there were no significant changes in Trk-A, Trk-B, p75, neurofilament L, neurofilament M and βIII tubulin mRNA expression. Zenarestat treatment significantly ameliorated the abnormal increase in Trk-C mRNA expression level. These data suggest that hyperactivation of the polyol pathway induces a deficit in neurotropism on peripheral sensory diabetic neuropathy.
- 公益社団法人 日本薬学会の論文
著者
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KANEKO Shuji
Department of Molecular Pharmacology, Graduate School of Pharmaceutical Sciences, Kyoto University
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Shimoshige Yukinori
Pharmacology Research Labs, Astellas Pharma Inc.
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Enomoto Ryugo
Pharmacology Research Labs, Astellas Pharma Inc.
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Aoki Toshiaki
Pharmacology Research Labs, Astellas Pharma Inc.
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Matsuoka Nobuya
Pharmacology Research Labs, Astellas Pharma Inc.
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Kaneko Shuji
Department Of Applied Biological Chemistry Graduate School Of Agricultural Science Kobe University
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Matsuoka Nobuya
Pharmacology Res. Labs Astellas Pharma Inc.
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Aoki Toshiaki
Pharmacology Res. Labs. Astellas Pharma Inc.
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