Lab study of how a water-based extract from Anthocleista djalonensis leaves reduces uterine muscle contractions

The aqueous fraction of the leaves of Anthocleista djalonensis significantly reduced the EC50 of uterine contractions in vitro.

• AD inhibited the uterine contractions induced by oxytocin and calcium chloride in a concentration-dependent manner.
• Similar inhibitory effects were observed with salbutamol and verapamil on uterine contractions.
• The presence of propranolol did not affect the inhibitory action of AD.
• AD and salbutamol produced relaxation of sustained uterine contractions induced by potassium.
• In a calcium-free environment, AD and salbutamol both inhibited oxytocin-induced contractions, whereas verapamil did not.
• AD likely exerts its effects through multiple mechanisms that do not involve beta-adrenergic receptors or solely depend on calcium influx.

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