Chapter 12 P2Y6-Evoked Microglial Phagocytosis

Kazuhide Inoue, Schuichi Koizumi, Ayako Kataoka, Hidetoshi Tozaki-Saitoh, Makoto Tsuda

研究成果: Chapter in Book/Report/Conference proceedingChapter

30 被引用数 (Scopus)

抄録

While it was reported that microglia is engaged in the clearance of dead cells or dangerous debris, the mechanism of phagocytosis is still unclear. Recently, we found that purinergic system has a very important role for the chemotaxis and phagocytosis of microglia. When neighboring cells are injured, the cells release or leak ATP into extracellular space and microglia rapidly move toward or extend a process to the nucleotides as chemotaxis through P2Y12 receptors of microglia. In the meanwhile, microglia expressing metabotropic P2Y6 receptors show phagocytosis by the stimulation of uridine 5′-diphosphate (UDP), an agonist of P2Y6. UDP/UTP is leaked when hippocampal neurons are damaged by kainic acid (KA) in vivo and in vitro. Systemic administration of KA in rats results in neuronal cell death in the hippocampal CA1 and CA3 regions, where mRNA for P2Y6 receptors increases activated microglia. Thus, the P2Y6 receptor is upregulated when neurons are damaged, and would function as a sensor for phagocytosis by sensing diffusible UDP signals.

本文言語英語
ホスト出版物のタイトルInternational Review of Neurobiology - 85
編集者G. Bagetta, T. Sakurada, S. Sakurada, M.T. Corasaniti
ページ159-163
ページ数5
DOI
出版ステータス出版済み - 7 14 2009

出版物シリーズ

名前International Review of Neurobiology
85
ISSN(印刷版)0074-7742

All Science Journal Classification (ASJC) codes

  • Clinical Neurology
  • Cellular and Molecular Neuroscience

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