Volume 6, Issue 5 (7-2008)                   IJRM 2008, 6(5): 193-0 | Back to browse issues page

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Gharib Naseri M K, Mohammadian M, Gharib Naseri Pharm Z. Antispasmodic effect of Physalis alkekengi fruit extract on rat uterus. IJRM. 2008; 6 (5) :193-0
URL: http://journals.ssu.ac.ir/ijrmnew/article-1-123-en.html
1- Physiology Research Center, Department of Physiology, School of Medicine, Ahwaz Jundishapur University of Medical Sciences, Ahwaz, Iran , Gharibnaseri_m@yahoo.com
2- Physiology Research Center, Department of Physiology, School of Medicine, Ahwaz Jundishapur University of Medical Sciences, Ahwaz, Iran
Abstract:   (1059 Views)
Background: Studies have shown that Physalis alkekengi reduces implantation and induces antifertility in rat. In Iranian traditional medicine it is believed that this plant has abortifacient and antifertility activities.
Objective: The goal of this study was to evaluate the effect of Physalis alkekengi ripe fruit hydroalcoholic extract (PFE) on uterine contractility and its possible mechanism(s).
Materials and Methods: Extraction of Physalis alkekengi fruit was carried out by maceration method (70% alcohol). Uterus was dissected out from adult non-pregnant rat (Wistar) and contracted by KCl (60mM) or oxytocin (10mU/ml) in an organ bath containing De Jalon solution and the effect of PFE on the uterine contractions was investigated. Furthermore, the role of α- and β-adrenoceptors, opioid receptors, nitric oxide and cyclic guanosine monophosphate synthesis inhibitors on the extract effects were evaluated.
Results: KCl- and oxytocin-induced uterine contractions were inhibited (p<0.001) by the cumulative concentrations of the extract in a concentration dependent manner. Incubation of uterus with propranolol (1μM) and L-NAME (100μM) attenuated the PFE antispasmodic effect (p<0.05). But the PFE effect was unaffected by phentolamine (1μM), naloxone (1μM) or methylene blue (10μM). In Ca2+-free with high potassium (60mM) De Jalon solution, cumulative concentrations of CaCl2 (0.1-0.5mM) induced uterine contraction concentration-dependently (p<0.001). Uterus incubation (5min) with PFE (0.25-1.75mg/ml) attenuated the CaCl2–induced contractions (p<0.05).
Conclusion: It seems that the extract induced antispasmodic effect mainly via calcium influx blockade and partially through blocking β-adrenoceptors and nitric oxide (NO) synthesis. However, neither α-adrenoceptors nor opioid receptors or cGMP synthesis were involved.
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Type of Study: Original Article |

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