Antispasmodic effect of hydroalcoholic and flavonoids extracts of Dracocephalum kotschyi on rabbit bladder

(2020) Antispasmodic effect of hydroalcoholic and flavonoids extracts of Dracocephalum kotschyi on rabbit bladder. Journal of HerbMed Pharmacology. pp. 145-152. ISSN 23455004 (ISSN)

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Abstract

Introduction: Dracocephalum kotschyi extract has antispasmodic activities on smooth muscle including ileum, uterus and trachea. The objective of this research was to investigate antispasmodic activity of hydroalcoholic and flavonoids extracts of D. kotschyi on rabbit bladder contractions. Methods: Rabbits were euthanized by carbon dioxide asphyxiation and the whole bladder was dissected out and immersed in the Tyrode's solution. Longitudinal bladder strips were mounted vertically in an organ bath at 37°C and gassed continuously with O2. Bladder strips were contracted with acetylcholine (ACh), KCl, or electrical field stimulation (EFS). Isotonic tension of the tissue was recorded before and after addition of hydroalcoholic or flavonoids rich extracts of D. kotschyi. Nifedipine and propantheline were used as standard drugs. Results: Standard drug propantheline, prevented bladder phasic contraction induced by ACh (1μM) without affecting KCl response. On the other hand, cumulative addition of nifedipine attenuated the tonic contractions induced by KCl (20mM) on bladder smooth muscle. Hydroalcoholic and flavonoids extracts of D. kotschyi at concentration ranges of 10-320 μg/mL in a concentration dependent way inhibited bladder tonic contraction induced by KCl (n=6). Both extracts also in a concentration-dependent manner relaxed EFS and ACh-induced contractions (range, 20-1280 μg/mL) of bladder smooth muscle in vitro. Complete inhibition was achieved with the highest used concentrations of the extracts. The inhibitory effect of the extract was reversible following washing the tissues with fresh Tyrode's solution. Conclusion: This study clearly demonstrated that D. kotschyi extracts were able to prevent contractions induced by ACh, KCl or EFS in isolated rabbit bladder. This means that people consuming this medicinal plant may face urinary retention which could be a problem for patients with prostate hypertrophy. On the other hand, this plant might be useful in patients with urinary incontinence. However, its usefulness must be assessed in the controlled clinical trials. © 2020 Nickan Research Institute. All rights reserved.

Item Type: Article
Keywords: Acetylcholine Bladder Dracocephalum kotschyi Electrical field stimulation KCl Smooth muscle acetic acid ethyl ester acetylcholine bicarbonate calcium chloride carbon dioxide chloroform dimethyl sulfoxide Dracocephalum kotschyi extract flavonoid gallic acid hydroalcoholic extract nifedipine potassium chloride propantheline bromide sodium carbonate sodium dihydrogen phosphate spasmolytic agent unclassified drug aerial plant part animal model animal tissue Article bladder contraction bladder muscle controlled study detrusor contractility dose response Dracocephalum kotschyi electrostimulation IC50 in vitro study Leporidae medicinal plant muscle isometric contraction nonhuman phytochemistry prostate hypertrophy ultraviolet visible spectrophotometry urine retention
Subjects: QV Pharmacology
Divisions: Faculty of Pharmacy and Pharmaceutical Sciences > Department of Pharmacognosy
Faculty of Pharmacy and Pharmaceutical Sciences > Department of Toxicology and Pharmacology
Page Range: pp. 145-152
Journal or Publication Title: Journal of HerbMed Pharmacology
Journal Index: Scopus
Volume: 9
Number: 2
Identification Number: https://doi.org/10.34172/jhp.2020.19
ISSN: 23455004 (ISSN)
Depositing User: Zahra Otroj
URI: http://eprints.mui.ac.ir/id/eprint/13564

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