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Involvement of reduced sensitivity to Ca2+ in b-adrenergic action on airway smooth muscle
http://hdl.handle.net/2237/2750
http://hdl.handle.net/2237/2750db5bb854-59a5-4f8a-890e-fd7c7883c6d0
名前 / ファイル | ライセンス | アクション |
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2005-12-27 | |||||
タイトル | ||||||
タイトル | Involvement of reduced sensitivity to Ca2+ in b-adrenergic action on airway smooth muscle | |||||
言語 | en | |||||
その他のタイトル | ||||||
その他のタイトル | Loss of Ca2+ sensitization in b-adrenergic action | |||||
言語 | en | |||||
著者 |
Oguma, Tetsuya
× Oguma, Tetsuya× Kume, Hiroaki× Ito, Satoru× Takeda, Naoya× Honjo, Haruo× Kodama, Itsuo× Shimokata, Kaoru× Kamiya, Kaichiro× 神谷, 香一郎 |
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アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | b-adrenergic receptor agonists | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Ca2+ sensitization | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | myosin phosphatase | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Gs | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Rho | |||||
抄録 | ||||||
内容記述 | To determine the involvement of Ca2+ sensitization in b-adrenergic action, we examined the relationship between isometric tension and intracellular Ca2+ concentration (F340/F380) in the inhibitory action of isoproterenol (ISO) against methacholine (MCh)- induced contraction, using fura-2 loaded tracheal smooth muscle.\nISO reduces contraction more than Ca2+ concentration. This phenomenon was mimicked by forskolin and db-cAMP. In contrast, an inhibition in tension by SKF- 96365, a non-selective Ca2+ channel inhibitor, was associated with that in F340/F380, different from ISO. In the presence of Rp-cAMP, a membrane-permeable inhibitor of protein kinase A (PKA), ISO caused an equivalent relaxation with a less reduction in F340/F380. The effects of ISO were not affected in the presence of Y-27632, an inhibitor of Rho-kinase, and bisindolylmaleimide, an inhibitor of protein kinase C. Even removal of Ca2+ from the extracellular surface, the effects of ISO was not affected. ISO also inhibits high K+-induced contraction without lowering F340/F380. However, response to ISO was completely diminished in the presence of calyculin A, an inhibitor of myosin phosphatase. In conclusion, b-adrenergic action antagonizes Ca2+ sensitization mediated by impairment of myosin phosphatase activity. Moreover, cAMP independent process, G protein direct action, is more potent in inhibiting this Ca2+ sensitization than PKA. | |||||
言語 | en | |||||
内容記述タイプ | Abstract | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | Blackwell Scientific Publication | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプresource | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
出版タイプ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1111/j.1365-2222.2006.02412.x | |||||
ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 09547894 | |||||
書誌情報 |
en : Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology 巻 36, 号 2, p. 183-191, 発行日 2006-02 |
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フォーマット | ||||||
application/pdf | ||||||
著者版フラグ | ||||||
値 | author | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2237/2750 | |||||
識別子タイプ | HDL |