ANTIDROMIC EFFECT OF CALCITONIN GENE-RELATED PEPTIDE CONTAINING NERVES ON CEREBRAL ARTERIES IN RATS : A possible role of sensory nerves on cerebral circulation

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It has generally been thought that the neurogenic control of cerebral circulation is decided mainly by the autonomic nervous system. Recent studies, however, indicate that sensory nerves rich in calcitonin gene-related peptide (CGRP) are also distributed on cerebral arteries. CGRP is one of neuropeptides that has strong vasodilative effect. This indicates that sensory nerves may antidromically dilate cerebral arteries mediated by CGRP. The aim of this study is to investigate the relationship between the CGRP containing nerves and cerebral circulation.<br>Firstly, we developed a selective denervation model of CGRP containing nerves.<br>The denervation was performed with intrathecal administration of capsaicin in rats.<br>Secondly, we measured the change of regional cerebral blood flow (rCBF) during the occlusion of bilateral common carotid artery or systemic hypotension.<br>CGRP immunoreactivity around cerebral arteries disappeared after capsaicin treatment. The rCBF during the occlusion of bilateral common carotid artery decreased more in the capsaicin group than in the control group. There was no significant difference in the changes of rCBF during systemic hypotension.<br>These results showed that CGRP containing nerves would participate in the vascular response of cerebral arteries. It is likely that sensory nerves with CGRP should have antidromic effect on cerebral circulation.

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  • Fukushima journal of medical science

    Fukushima journal of medical science 47(2), 75-84, 2001-12-01

    福島医学会

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各種コード

  • NII論文ID(NAID)
    10013003019
  • NII書誌ID(NCID)
    AA0065246X
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00162590
  • データ提供元
    CJP書誌  J-STAGE 
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