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논문 기본 정보

자료유형
학술저널
저자정보
Kim, Hyun-Seung (Department of Pharmacology, College of Medicine, Hanyang University) Shin, In-Chul (Department of Pharmacology, College of Medicine, Hanyang University)
저널정보
한국응용약물학회 The journal of applied pharmacology : the official journal of the Korean Society of Applied Pharmacology The journal of applied pharmacology : the official journal of the Korean Society of Applied Pharmacology 제12권 제2호
발행연도
2004.1
수록면
108 - 113 (6page)

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This study was performed to investigate the regulatory mechanism of cerebral blood flow of adenosine $A_{2B}$ receptor agonist in the rats, and to define whether its mechanism is mediated by adenylate cyclase and guanylate cyclase. in pentobarbital-anesthetized, pentobrabital-paralyzed and artificially ventilated male Sprague-Dawley rats, all drugs were applied topically to the cerebral cortex. Blood How from cerebral cortex was measured using laser-Doppler flowmetry. Topical application of an adenosine $A_{2B}$ receptor agonist, 5'-N-ethylcar-boxamidoadenosine (NECA; 4 umol/l) increased cerebral blood flow. This effect of NECA (4 umol/l) was not blocked by pretreatment with adenylate cyclase inhibitor, MDL-12330 (20 umol/l). But effect of NECA (4 umol/l) was blocked by pretreatment with guanylate cyclase inhibitor, LY-83383 (10 umol/l). These results suggest that adenosine $A_{2B}$ receptor increases cerebral blood flow. It seems that this action of adenosine $A_{2B}$ receptor is mediated via the activation of guanylate cyclase in the cerebral cortex of the rats.

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