Radially expanding transglial calcium waves in the intact cerebellum

Tycho M. Hoogland, Bernd Kuhn, Werner Göbel, Wenying Huang, Junichi Nakai, Fritjof Helmchen, Jane Flint, Samuel S.H. Wang

研究成果: Article査読

105 被引用数 (Scopus)

抄録

Multicellular glial calcium waves may locally regulate neural activity or brain energetics. Here, we report a diffusion-driven astrocytic signal in the normal, intact brain that spans many astrocytic processes in a confined volume without fully encompassing any one cell. By using 2-photon microscopy in rodent cerebellar cortex labeled with fluorescent indicator dyes or the calcium-sensor protein G-CaMP2, we discovered spontaneous calcium waves that filled approximately ellipsoidal domains of Bergmann glia processes. Waves spread in 3 dimensions at a speed of 4-11 μm/s to a diameter of ≈50 μm, slowed during expansion, and were reversibly blocked by P2 receptor antagonists. Consistent with the hypothesis that ATP acts as a diffusible trigger of calcium release waves, local ejection of ATP triggered P2 receptor-mediated waves that were refractory to repeated activation. Transglial waves represent a means for purinergic signals to act with local specificity to modulate activity or energetics in local neural circuits.

本文言語English
ページ(範囲)3496-3501
ページ数6
ジャーナルProceedings of the National Academy of Sciences of the United States of America
106
9
DOI
出版ステータスPublished - 2009 3 3
外部発表はい

ASJC Scopus subject areas

  • 一般

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