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2018 Fiscal Year Final Research Report

Elucidation of mechanism of itch transmission to spinal cord using in vivo patch clamp and three-dimensional electron microscope.

Research Project

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Project/Area Number 15K08667
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Pain science
Research InstitutionUniversity of Toyama

Principal Investigator

Uta Daisuke  富山大学, 大学院医学薬学研究部(薬学), 助教 (70598416)

Co-Investigator(Kenkyū-buntansha) 安東 嗣修  富山大学, 大学院医学薬学研究部(薬学), 准教授 (50333498)
高浪 景子  国立遺伝学研究所, 遺伝形質研究系, 助教 (70578830)
Research Collaborator SAKAMOTO hirotaka  
Kiguchi norikazu  
Project Period (FY) 2015-04-01 – 2019-03-31
Keywords痒み / 痛み / in vivo patch clamp / spinal dorsal horn / 5-HT / GRP / electrophysiology
Outline of Final Research Achievements

The mechanism for the itch transmission in the central nervous system remains unclear. The present study was designed to analyze pruritic synaptic responses evoked in spinal dorsal horn and cortex neurons of rodents by using an in vivo whole-cell patch-clamp and extracellular recording technique. The present main findings are that pruriceptive itch-sensitive afferent fibers evoke excitatory synaptic responses mainly onto delayed firing and sustained repetitive firing type neurons which are morphologically classified as the excitatory interneurons.

Free Research Field

神経生理学

Academic Significance and Societal Importance of the Research Achievements

痒みは非常に不快な感覚であり、特にアトピー性皮膚炎など慢性そう痒は既存薬物では効果を示さないことが多く患者のQOLを著しく低下させる。しかし、痒みの情報伝達機構は不明な点が多い。申請課題の研究成果により、痒みの情報伝達機構や、痒み受容ニューロンの特徴が明らかになった。このことは、今後慢性そう痒モデル動物を用いることで病態時の解析にも非常に役立つ成果である。更に、得られた成果は新規治療法、治療薬を開発するうえで重要な情報となりうる。

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Published: 2020-03-30  

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