Measuring the vascular diameter of brain surface and parenchymal arteries in awake mouse

Yuta Sekiguchi, Kazuto Masamoto*, Hiroyuki Takuwa, Hiroshi Kawaguchi, Iwao Kanno, Hiroshi Ito, Yutaka Tomita, Yoshiaki Itoh, Norihiro Suzuki, Ryo Sudo, Kazuo Tanishita

*この研究の対応する著者

研究成果: Conference contribution

20 被引用数 (Scopus)

抄録

The present study reports a semiautomatic image analysis method for measuring the spatiotemporal dynamics of the vessel dilation that was fluorescently imaged with either confocal or two-photon microscope. With this method, arterial dilation induced by whisker stimulation was compared between cortical surface and parenchymal tissue in the vibrissae area of somatosensory cortex in awake Tie2-GFP mice in which the vascular endothelium had genetically expressed green fluorescent protein. We observed that a mean arterial diameter during a pre-stimulus baseline state was 39 ± 7, 19 ± 1, 16 ± 4, 17 ± 4, and 14 ± 3 μm at depths of 0, 100, 200, 300, and 400 μm, respectively. The stimulation-evoked dilation induced by mechanical whisker deflection (10 Hz for 5 s) was 3.4 ± 0.8, 1.8 ± 0.8, 1.8 ± 0.9, 1.6 ± 0.9, and 1.5 ± 0.6 μm at each depth, respectively. Consequently, no significant differences were observed for the vessel dilation rate between the cortical surface and parenchymal arteries: 8.8 %, 9.9 %, 10.9 %, 9.2 %, and 10.3 % relative to their baseline diameters, respectively. These preliminary results demonstrate that the present method is useful to further investigate the quantitative relationships between the spatiotemporally varying arterial tone and the associated blood flow changes in the parenchymal microcirculation to reveal the regulatory mechanism of the cerebral blood flow.

本文言語English
ホスト出版物のタイトルAdvances in Experimental Medicine and Biology
出版社Springer New York LLC
ページ419-425
ページ数7
789
ISBN(印刷版)9781461472568
DOI
出版ステータスPublished - 2013
外部発表はい

出版物シリーズ

名前Advances in Experimental Medicine and Biology
789
ISSN(印刷版)00652598

ASJC Scopus subject areas

  • 生化学、遺伝学、分子生物学(全般)
  • 医学(全般)

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