Release of Endogenous ATP from Rat Caudal Artery
作者:
David P. Westfall,
Khaled Sedaa,
Richard A. Bjur,
期刊:
Journal of Vascular Research
(Karger Available online 1987)
卷期:
Volume 24,
issue 3
页码: 125-127
ISSN:1018-1172
年代: 1987
DOI:10.1159/000158684
出版商: S. Karger AG
关键词: Norepinephrine;Alpha-1-receptors;Adenyl purines;ATP;Methoxamine
数据来源: Karger
摘要:
Electrical field stimulation of the rat caudal artery (0.5-ms pulses at 8 Hz for 3 min) results in the release of norepinephrine (quantified by HPLC-electrochemical detection) and adenyl purines including ATP, ADP and AMP (quantified by HPLC-fluorescence detection). The amount of ATP released from the tissue exceeded the amount of norepinephrine. Because postjunctional α1-adrenoceptor stimulation with methoxamine also causes release of ATP, both neuronal and extraneuronal sites may contribute to the overflow of ATP. Results with the α1-adrenoceptor antagonist prazosin lend support to this notion. Prazosin (10–6M) completely blocked the release of ATP by methoxamine but only partially reduced the release of ATP by field stimulat
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