Nitric oxide-mediated injury of interstitial cells of Cajal and intestinal dysmotility under endotoxemia of mice
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概要
- 論文の詳細を見る
Gastrointestinal dysmotility is frequently observed under septic conditions, yet its precise mechanisms remain to be elucidated. In this study, we have investigated the mechanisms of intestinal dysmotility by lipopolysaccharides (LPS) and the role of the interstitial cells of Cajal (ICCs) in motility disorders using a mouse endotoxin model. The injection of LPS caused time- and dose-dependent decreases in the intestinal contractility, which was associated with similar time- and dose-dependent decreases in the number of KIT-positive fibroblast-like cells located in the intermuscular layer. iNOS inhibitors, L-NAME and aminoguanidine (AG), but not 7-nitroindazole (7NI), a specific nNOS inhibitor, inhibited the LPS-induced decreases in both the contractility and the number of KIT-positive cells. A spontaneous NO releaser, FK409, not only diminished spontaneous electrical potential and phasic contractions, but also decreased the number of KIT-positive cells. Pretreatment with gadolinium inhibited the activation of macrophages and the induction of iNOS in intestinal resident macrophages, and restored the number of KIT-positive cells and intestinal contractions. These results suggested that NO produced from intestinal macrophages via iNOS induced by LPS, may be involved in the ICCs injury and intestinal dysmotility under septic conditions.
- バイオメディカルリサーチプレスの論文
著者
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Nishida Toshirou
Department Of Gastroenterological Surgery Osaka University Graduate School Of Medicine
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Koike Masato
Department Of Cell Biology And Neurosciencce (a1) Osaka University Graduate School Of Medicine
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Uchiyama Yasuo
Department Of Anatomy Jichi Medical School
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Matsuda Hikaru
Department Of Cardiology Ehime Prefectural Imabari Hospital
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Sawa Yoshiki
Department Of Cardiovascular Medicine Osaka University Graduate School Of Medicine
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Ueshima Shigeyuki
Department Of Surgery Osaka Police Hospital
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Sawa Yoshiki
Department of Surgery, Osaka University Graduate School of Medicine
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