イケウラ　ツカサ   IKEURA TSUKASA   池浦　司    所属   関西医科大学  内科学第三講座    職種   准教授
論文種別	原著(症例報告除く)
言語種別	英語
査読の有無	査読あり
表題	Effects of sensory denervation by neonatal capsaicin administration on experimental pancreatitis induced by dibutyltin dichloride.
掲載誌名	正式名：Medical molecular morphology 略　 称：Med Mol Morphol ISSNコード：18601480/18601499
巻・号・頁	40(3),pp.141-149
著者・共著者	Ikeura T, Kataoka Y, Wakabayashi T, Mori T, Takamori Y, Takamido S, Okazaki K, Yamada H
担当区分	筆頭著者
発行年月	2007/09
概要	Increase in the number of intrapancreatic sensory nerve fibers has been implicated in the generation of pain in chronic pancreatitis. Because some sensory neurotransmitters (e.g., substance P) are known to have proinflammatory effects, we hypothesized that denervation of intrapancreatic nerves might influence not only pain generation but also inflammation. Neonatal Lewis rats were injected with capsaicin (50 mg/kg or 0 mg/kg), a neurotoxin, to induce denervation of primary sensory neurons. When rats reached 170-190 g body weight, experimental pancreatitis was induced by a single administration of dibutyltin dichloride (7 mg/mg). The severity of pancreatitis was evaluated in both groups in the acute phase (at 3 and 7 days) and chronic phase (at 28 days). At day 7, the sensory denervation induced by neonatal capsaicin administration inhibited pancreatic inflammation on both histological (determination of interstitial edema, expansion of interlobular septa and intercellular spaces, and inflammatory cell infiltration) and biochemical (intrapancreatic myeloperoxidase activity) evaluation. Furthermore, at day 28, glandular atrophy, pseudotubular complexes, and rate of fibrosis were each significantly lower in the capsaicin-pretreated group than in the vehicle-pretreated group. Our findings provide in vivo evidence that primary sensory neurons play important roles in both acute pancreatitis and chronic pancreatic inflammation with fibrosis.
DOI	10.1007/s00795-007-0374-7
文献番号	17874046