6533b831fe1ef96bd1299b2a

RESEARCH PRODUCT

Effects of sulphonylureas on spontaneous motility and induced contractions in rat isolated uterus

Villar AM D IvoraM P D'ocónElsa Anselmi

subject

endocrine systemmedicine.medical_specialtyContraction (grammar)TolbutamideUterusPharmaceutical ScienceMotilitychemistry.chemical_elementIn Vitro TechniquesBiologyCalciumGlibenclamideContractilityUterine ContractionTolbutamideInternal medicineGlyburidemedicineAnimalsHypoglycemic AgentsPharmacologyRats Inbred StrainsVanadiumRatsSulfonylurea CompoundsEndocrinologymedicine.anatomical_structureMechanism of actionchemistryCalciumFemaleVanadatesmedicine.symptommedicine.drug

description

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.

https://doi.org/10.1111/j.2042-7158.1986.tb04493.x