Evidence for M₂ and M₃ Muscarinic Receptor Involvement in Cholinergic Excitatory Junction Potentials Through Synergistic Activation of Cation Channels in the Longitudinal Muscle of Mouse Ileum
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- Matsuyama Hayato
- Laboratory of Pharmacology, Department of Veterinary Medicine, Faculty of Applied Biological Science, Gifu University, Japan
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- Tanahashi Yasuyuki
- Laboratory of Pharmacology, Department of Animal Medical Sciences, Faculty of Life Sciences, Kyoto Sangyo University, Japan
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- Kitazawa Takio
- Department of Pharmacology, School of Veterinary Medicine, Rakuno Gakuen University, Japan
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- Yamada Masahisa
- Common Resources Group, Okinawa Institute of Science and Technology, Japan
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- Komori Seiichi
- Laboratory of Pharmacology, Department of Veterinary Medicine, Faculty of Applied Biological Science, Gifu University, Japan
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- Unno Toshihiro
- Laboratory of Pharmacology, Department of Veterinary Medicine, Faculty of Applied Biological Science, Gifu University, Japan
書誌事項
- タイトル別名
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- Evidence for M<sub>2</sub> and M<sub>3</sub> Muscarinic Receptor Involvement in Cholinergic Excitatory Junction Potentials Through Synergistic Activation of Cation Channels in the Longitudinal Muscle of Mouse Ileum
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抄録
Cholinergic nerve–mediated excitatory junction potentials (EJPs) in the longitudinal muscle of mouse ileum were characterized by using M2 or M3 muscarinic receptor–knockout (KO) mice and 1-[β-[3-(4-methoxyphenyl) propoxy]-4-methoxyphenethyl]-1H-imidazole hydrochloride (SK&F 96365) and pertussis toxin (PTX). EJPs evoked by electrical field stimulation (EFS) in wild-type preparations, initially determined to be cholinergic in origin using tetrodotoxin, atropine, and eserine, were profoundly depressed after SK&F 96365 treatment known to block muscarinic receptor–operated cation channels. A similar depression of the EJPs was also observed by PTX treatment, which is predicted to disrupt M2-mediated pathways linked to cation channel activation. In M2-KO mouse preparations, cholinergic EJPs were evoked by EFS with their relative amplitude of 20% – 30% to the wild-type EJP and strongly inhibited by SK&F 96365. No cholinergic EJP was seen in M3-KO as well as M2/M3 double-KO preparations. The results suggest that the wild-type cholinergic EJP is not a simple mixture of M2 and M3 responses, but due to synergistic activation of cation channels by both M2 and M3 receptors in the murine ileal longitudinal muscle.
収録刊行物
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- Journal of Pharmacological Sciences
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Journal of Pharmacological Sciences 121 (3), 227-236, 2013
公益社団法人 日本薬理学会
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詳細情報 詳細情報について
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- CRID
- 1390001205180636672
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- NII論文ID
- 10031165467
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- NII書誌ID
- AA11806667
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- COI
- 1:STN:280:DC%2BC3svhvVeqtA%3D%3D
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- ISSN
- 13478648
- 13478613
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- NDL書誌ID
- 024351386
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- PubMed
- 23446189
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可