Effects of intracerebroventricular administration of aminophylline on hyperbaric-induced increase in carotid blood flow.

Abstract : Carotid blood flow was measured in rats by implanted transit-time ultrasonic flowprobes during hyperbaric experiments at up to 70 bar (7 MPa) using an helium-oxygen hyperoxic (partial pressure of O2 = 400 mbar) mixture. Before the hyperbaric experiment, an intracerebroventricular injection of phosphate saline buffered solution (PBS) or aminophylline, an adenosine receptor blocker, in PBS was given. Throughout the hyperbaric experiment carotid blood flow increased with ambient pressure in both PBS, i.e. control, and aminophylline treated rats. The increase in carotid blood flow was significantly attenuated in aminophylline treated rats. Additional experiments showed that the increased carotid blood flow was independent of hyperoxia as well as of temperature. The hypothesis that the hyperbaric dependent increase in carotid blood flow was mediated by brain adenosine receptors and its implication regarding a cerebral vasodilatation are discussed.
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Article dans une revue
European Journal of Applied Physiology, Springer Verlag, 1995, 71 (1), pp.87-94
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http://hal.univ-brest.fr/hal-00743434
Contributeur : François Guerrero <>
Soumis le : jeudi 18 octobre 2012 - 23:13:58
Dernière modification le : jeudi 18 octobre 2012 - 23:13:58

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  • HAL Id : hal-00743434, version 1
  • PUBMED : 7556137

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F. Guerrero, H. Burnet. Effects of intracerebroventricular administration of aminophylline on hyperbaric-induced increase in carotid blood flow.. European Journal of Applied Physiology, Springer Verlag, 1995, 71 (1), pp.87-94. 〈hal-00743434〉

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