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| Fujikawa, Ryu; Muroi, Yoshikage; Unno, Toshihiro; Ishii, Toshiaki; 室井, 喜景; 石井, 利明. |
| Botulinum neurotoxin serotype A (BoNT/A) inhibits acetylcholine release at the neuromuscular junction in isolated muscles, and ouabain can partially block its effect. However, it is not clear whether ouabain attenuates BoNT/A-induced neuromuscular paralysis in vivo. In this work, we investigated the effects of ouabain on BoNT/A-induced neuromuscular paralysis in mice. Ouabain was administered to mice intraperitoneally immediately after a single injection of BoNT/A into skeletal muscle. The effects of ouabain on BoNT/A-induced muscle paralysis were assessed by quantitative monitoring of muscle tension and digit abduction via the digit abduction scoring (DAS) assay. A single administration of ouabain significantly prolonged BoNT/A-induced neuromuscular... |
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Palavras-chave: Ouabain; Botulinum neurotoxin; Muscle atrophy; MAFbx; MuRF-1. |
| Ano: 2010 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3123 |
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| Kinoshita, Ken-ichi; Muroi, Yoshikage; Unno, Toshihiro; Ishii, Toshiaki. |
| Cognitive impairment often occurs in Parkinson's disease (PD), but the mechanism of onset remains unknown. Recently, we reported that PD model mice produced by 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) show facilitation of hippocampal memory extinction, which may be the cause of cognitive impairment in PD. When we examined the cAMP/CREB signaling in the hippocampus, decreased levels of cAMP and phosphorylated CREB were observed in the dentate gyrus (DG) of MPTP-treated mice. Administration of rolipram improved the memory deficits with concomitant recovery of cAMP and phosphorylated CREB levels, suggesting that reduced cAMP/CREB signaling in the DG leads to cognitive impairment in MPTP-treated mice. (C) 2017 The Authors. Production and hosting by... |
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Palavras-chave: Memory extinction; MPTP-Treated mice; Phosphodiesterase IV inhibitor rolipram. |
| Ano: 2017 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4547 |
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