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Losartan improves visceral sensation and gut barrier in a rat model of irritable bowel syndrome

https://asahikawa-med.repo.nii.ac.jp/records/2000498
https://asahikawa-med.repo.nii.ac.jp/records/2000498
f6ce2718-f4ce-4295-b423-983c2b817362
名前 / ファイル ライセンス アクション
32056324.pdf 32056324.pdf (2.1 MB)
Item type 学術雑誌論文 / Journal Article_02(1)
公開日 2025-05-13
タイトル
タイトル Losartan improves visceral sensation and gut barrier in a rat model of irritable bowel syndrome
言語 en
言語
言語 eng
キーワード
主題Scheme Other
キーワード angiotensin II type 1 receptor
キーワード
主題Scheme Other
キーワード gut barrier
キーワード
主題Scheme Other
キーワード irritable bowel syndrome
キーワード
主題Scheme Other
キーワード lipopolysaccharide
キーワード
主題Scheme Other
キーワード visceral sensation
資源タイプ
資源タイプ journal article
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
著者 野津, 司

× 野津, 司

ja 野津, 司

ja-Kana ノヅ, ツカサ

en Nozu, Tsukasa

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宮岸, 沙織

× 宮岸, 沙織

ja 宮岸, 沙織

ja-Kana ミヤギシ, サオリ

en Miyagishi, Saori

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野津, 麟太郎

× 野津, 麟太郎

ja 野津, 麟太郎

ja-Kana ノヅ, リンタロウ

en Nozu, Rintaro

Search repository
高草木, 薫

× 高草木, 薫

ja 高草木, 薫

ja-Kana タカクサキ, カオル

en Takakusaki, Kaoru

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奥村, 利勝

× 奥村, 利勝

ja 奥村, 利勝

ja-Kana オクムラ, トシカツ

en Okumura, Toshikatsu

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bibliographic_information en : Neurogastroenterology and motility

巻 32, 号 6, p. e13819, 発行日 2020-06-01
ISSN
収録物識別子タイプ PISSN
収録物識別子 1350-1925
DOI
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 https://doi.org/10.1111/nmo.13819
item_1716186501932
関連タイプ isVersionOf
識別子タイプ PMID
関連識別子 32056324
item_5_description_33
内容記述タイプ Abstract
内容記述 Background: Lipopolysaccharide (LPS) or repeated water avoidance stress (WAS) induces visceral allodynia and colonic hyperpermeability via corticotropin-releasing factor (CRF) and proinflammatory cytokines, which is considered to be a rat irritable bowel syndrome (IBS) model. As losartan is known to inhibit proinflammatory cytokine release, we hypothesized that it improves these visceral changes.

Methods: The threshold of visceromotor response (VMR), that is, abdominal muscle contractions induced by colonic balloon distention was electrophysiologically measured in rats. Colonic permeability was determined in vivo by quantifying the absorbed Evans blue in colonic tissue for 15 minutes spectrophotometrically.

Key results: Lipopolysaccharide (1 mg kg-1 ) subcutaneously (s.c.) reduced the threshold of VMR and increased colonic permeability. Losartan (5-25 mg kg-1 s.c.) for 3 days inhibited these changes in a dose-dependent manner. Moreover, repeated WAS (1 hour daily for 3 days) or intraperitoneal injection of CRF (50 µg kg-1 ) induced the similar visceral changes as LPS, which were also eliminated by losartan. These effects by losartan in LPS model were reversed by GW9662 (a peroxisome proliferator-activated receptor-γ [PPAR-γ] antagonist), NG -nitro-L-arginine methyl ester (a nitric oxide [NO] synthesis inhibitor), or naloxone (an opioid receptor antagonist). Moreover, it also inhibited by sulpiride (a dopamine D2 receptor antagonist) or domperidone (a peripheral dopamine D2 antagonist).

Conclusion & inferences: Losartan prevented visceral allodynia and colonic hyperpermeability in rat IBS models. These actions may be PPAR-γ-dependent and also mediated by the NO, opioid, and dopamine D2 pathways. Losartan may be useful for IBS treatment.
言語 en
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