| Project/Area Number |
18591452
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Digestive surgery
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| Research Institution | Tohoku University |
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Principal Investigator |
UENO Tatsuya (2007) Tohoku University, Tohoku University Hospital, Assistant Professor (20332512)
舟山 裕士 (2006) 東北大学, 大学院・医学系研究科, 助教授 (50192315)
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| Co-Investigator(Kenkyū-buntansha) |
SASAKI Iwao Graduate School of Medicine, 大学院・医学系研究科, Professer (60125557)
SHIBATA Chikashi Tohoku University Hospital, 病院, Lecturer (30270804)
小林 照忠 東北大学, 病院, 助教 (30312143)
木内 誠 東北大学, 高等教育開発推進センター, 助教 (90422146)
小山 淳 東北大学, 病院, 助教 (80436112)
上野 達也 東北大学, 病院・助手 (20332512)
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| Project Period (FY) |
2006 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥3,940,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥540,000)
Fiscal Year 2007: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2006: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | Vanilloid agonist / Defecation / Intra-stomach administration / バニロイド受容体 / TRPV-1 / カプサイシン / 胃結腸反射 / 結腸運動 / 生理学 / 薬理学 / 生体機能利用 |
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| Research Abstract |
Our study aim to control gastrointestinal motility by drugs and surgery and to do treatment of constipation and diarrhea for patients. Vanilloid receptor is known as s nociceptor which capsaicin bind to and we. had reported that administration of intra-stomach capsaicin promoted colonic motility and induced defecation. Although this phenomenon suggested that capsaicin. can be the oral drug, for constipation, there was clinically a big problem that capsaicin induced high-frequently vomiting as well as defecation. Some kinds of vanilloid receptor agonist have been developed, but their effects on colonic motility have not been studied yet. We investigated which vanilloid receptor agonist induce defecation and promote colonic movement without vomiting. Mongrel dogs equipped with three strain gauge force transducers (the proximal, middle, and distal colon) were used. A silicone catheter was introduced into the stomach to administer vanilloid agonists. The each effect of intra-stomach vanilloid agonists (piperine, anandamide, evodiamine, arvanil, resiniferatoxin) on colonic motor activity, defecation and vomiting was studied in the interdigestive state.
Resinifeartoxin and arvanil induced gastro-colitic reflux and defecation as well as capsaicin, but we always found vomiting when defecated. Other vanilloid agonists had no effect lile capsaicin. There is no institution where the effect. of vanilloid agonists on gastrointestinal motility is studied in Vivo, our data are very important for development of a new drug for constipation. So, we need to investigate and collect data furthmore.
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