Dietary phytoestrogens maintain contractile responses to carbachol with age in the female rat isolated bladder

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Title Dietary phytoestrogens maintain contractile responses to carbachol with age in the female rat isolated bladder
Author Owen, Suzzanne; Rose'Meyer, Roselyn Barbara; Massa, Helen Maureen
Journal Name Life Sciences
Year Published 2011
Place of publication United States
Publisher Elsevier
Abstract Aims: Development of urinary incontinence, for many women, occurs following menopause. Dietary phytoestrogens consumed over the long term may affect the contractile function and maintenance of the urinary bladder in post menopausal women. This study examined the muscarinic receptor mediated contractile responses in the rat isolated bladder in response to ovariectomy and long term dietary phytoestrogen consumption. Main methods: Ovariectomised or sham-operated female Wistar rats (8 weeks) were fed either normal rat chow (soy, phytoestrogens) or a non-soy (phytoestrogen free) diet. Bladders were dissected from rats at 12, 24 and 52 weeks of age and placed in 25 ml organ baths filled with McEwans solution. Key findings: The contractile response to carbachol, in 12 week old female rats did not change as a result of dietary phytoestrogens or ovariectomy (PN0.05). At 24 weeks of age, detrusor muscle strip responses to carbachol from non-soy fed ovariectomised rats were attenuated (Pb0.05). At 52 weeks, bladder detrusor strip responses to carbachol were reduced in all treatment groups with the exception of the soy-fed sham operated rats. Significance: These results suggest an age-related reduction in the contractile response of the detrusor to the muscarinic receptor agonist carbachol, which may be prevented by long term dietary phytoestrogen intake.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1016/j.lfs.2011.05.022
Volume 89
Issue Number 7-8
Page from 213
Page to 220
ISSN 0024-3205
Date Accessioned 2012-03-07; 2012-03-21T23:05:15Z
Date Available 2012-03-21T23:05:15Z
Research Centre Griffith Health Institute; Heart Foundation Research Centre
Faculty Griffith Health Faculty
Subject Receptors and Membrane Biology
URI http://hdl.handle.net/10072/43756
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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