alexa Abstract | Pharmacodynamic study of interaction of aqueous leaf extract of psidium guajava linn. (myrtaceae) with receptor systems using isolated tissue preparations

Indian Journal of Pharmaceutical Sciences
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Abstract

The present study investigates the interaction of aqueous leaf extract of Psidium guajava with muscarinic, serotonergic and adrenergic receptor system using isolated rat ileum, gastric fundus and trachea, respectively. The concentration-dependent contractile response of aqueous leaf extract of Psidium guajava was parallel and rightward of standard agonists, ACh and 5-HT indicating agonistic activity on muscarinic and serotonergic receptor systems. The inhibition of aqueous leaf extract of Psidium guajava mediated contractions in presence of atropine (10-7 M) and ketanserin (10-6 M) confirmed the activity. Relaxant effect of PG (0.2 mg/ml) on carbachol induced pre-contracted rat tracheal chain indicated its agonistic action on adrenergic receptor system. Inhibition (P<0.05) of the action in the presence of propranolol (1 ng/ml) confirmed the activity. It may be concluded that PG possesses agonistic action on muscarinic, serotonergic and adrenergic receptor systems.

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Author(s): RK Mahaseth S Kumar Shagun Dutta Ratika Sehgal Preety Rajora Rajani Mathur

Keywords

Psidium guajava, serotonergic receptors, muscarinic receptors, adrenergic receptors, ileum, gastric fundus, tracheal chain

 
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