Abstract
In guinea pigs anaesthetized with sodium pentobarbital, SR 48692, a non peptide neurotensin receptor antagonist blunted the blood pressure increase induced by exogenous neurotensin in a dose dependent manner. Furthermore, in isolated spontaneously beating guinea pig atria, both the tachycardia and inotropic responses induced by neurotensin were potently antagonized. SR 48692 did not show any intrinsic effect in vivo or in vitro.
MeSH terms
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Animals
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Blood Pressure / drug effects
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Cardiovascular System / drug effects*
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Dose-Response Relationship, Drug
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Guinea Pigs
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Heart Atria / drug effects
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In Vitro Techniques
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Male
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Muscle Contraction / drug effects
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Neurotensin / pharmacology*
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Pyrazoles / pharmacology*
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Quinolines / pharmacology*
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Receptors, Neurotensin / antagonists & inhibitors*
Substances
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Pyrazoles
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Quinolines
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Receptors, Neurotensin
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SR 48692
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Neurotensin