Journal of Ethnopharmacology 2020-Mar
Pimpinella anisum extract attenuates spontaneous and agonist-induced uterine contraction in term-pregnant rats.
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MATERIAL AND METHODS
Intact uterine strips without endometrial layer were isolated from female term-pregnant Wistar rats (22 days of gestation) and mounted in a tissue bath apparatus for in vitro isometric force recording. The effects of different concentrations of Pimpinella anisum extract (PAE) (1, 3, 5, and 7 mg/mL) were examined on uterine contractions generated spontaneously or induced with oxytocin (5 nmol/L), Bay K8644 (1 μmol/L), and carbachol (10 μmol/L). In some experiments, PAE was applied on depolarized myometrium in the presence of high-KCl solution (60 mmol/L). The effect on Ca2+ release was also examined.CONCLUSION
The present findings demonstrate the potentials of PAE to relax pregnant uterine contractions possibly by blocking Ca2+ entry via L-type calcium channels and inhibiting Ca2+ release from the internal store. The tocolytic effects of PAE may be a potential adjuvant against strong premature uterine contractions which threaten early pregnancy although clinical studies are required.