In vitro rat bladder function after neonatal estrogenization.

Penelope A Longhurst

doi:10.1016/s0022-5347(05)64246-2

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PubMed · 12442012

In vitro rat bladder function after neonatal estrogenization.

Penelope A Longhurst

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Abstract

PURPOSE: Experiments were done to evaluate the functional effects of neonatal diethylstilbestrol (DES) treatment on bladder function in male and female Noble rats. MATERIALS AND METHODS: At 5 months after neonatal DES bladders were removed and weighed. Ventral and dorsal bladder strips were prepared to evaluate the effects of neonatal DES on contractile responses to electrical field stimulation, carbachol, adenosine triphosphate, phenylephrine and KCl. Relaxant responses to the catecholamines arterenol (norepinephrine), epinephrine and isoproterenol were also monitored. RESULTS: Neonatal DES resulted in significant increases in bladder mass in males and females. Contractile and relaxant responses were largely unchanged by neonatal DES treatment and the only change observed was a decreased response of ventral strips from male neonatal DES rats to 4 and 8 Hz. stimulation. Ventral strips from male control and neonatal DES rats responded to field stimulation and carbachol with significantly greater responses than dorsal strips and were more sensitive to the relaxant actions of norepinephrine and epinephrine. CONCLUSIONS: The data confirm that neonatal DES causes infravesical obstruction. However, in contrast to published reports of the effects of surgically induced mild outlet obstruction, neonatal DES treatment has little effect on in vitro bladder strip contractile or relaxant function. Thus, the neonatal DES treated rat does not seem to be a useful model in which to study the in vitro effects of partial outlet obstruction on the bladder.

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Adenosine Triphosphate Adrenergic Agonists Animals Animals, Newborn Carbachol Catecholamines Cholinergic Agonists Diethylstilbestrol Electric Stimulation Female In Vitro Techniques Male Muscle Contraction Potassium Chloride Rats Urinary Bladder Journal Article Research Support, U.S. Gov't, P.H.S.

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Penelope A Longhurst. 2002. In vitro rat bladder function after neonatal estrogenization.. https://doi.org/10.1016/s0022-5347(05)64246-2

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