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RESEARCH PRODUCT
Effects of sulphonylureas on spontaneous motility and induced contractions in rat isolated uterus
Villar AM D IvoraM P D'ocónElsa Anselmisubject
endocrine systemmedicine.medical_specialtyContraction (grammar)TolbutamideUterusPharmaceutical ScienceMotilitychemistry.chemical_elementIn Vitro TechniquesBiologyCalciumGlibenclamideContractilityUterine ContractionTolbutamideInternal medicineGlyburidemedicineAnimalsHypoglycemic AgentsPharmacologyRats Inbred StrainsVanadiumRatsSulfonylurea CompoundsEndocrinologymedicine.anatomical_structureMechanism of actionchemistryCalciumFemaleVanadatesmedicine.symptommedicine.drugdescription
Abstract To clarify the action of sulphonylureas on calcium, the effect of tolbutamide and ghbenclamide has been investigated on a Ca-dependent process, the contractile activity of uterine smooth muscle. Both sulphonylureas antagonized the contractions evoked by CaCl2 in a non-competitive manner when the uterus was maintained in depolarizing solution and did not affect the spontaneous contractions of rat uterus. The capacity of tolbutamide and ghbenclamide to relax vanadate-induced contraction of rat uterus in Ca-free medium suggests that sulphonylureas may have an intracellular site of action related to cytosolic free Ca levels, or effect a reduction in Ca action.
year | journal | country | edition | language |
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1986-10-01 | Journal of Pharmacy and Pharmacology |