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Abstract

Autonomic receptors in urinary tract: sex and age differences.

J Latifpour, S Kondo, B O'Hollaren, T Morita and R M Weiss
Journal of Pharmacology and Experimental Therapeutics May 1990, 253 (2) 661-667;
J Latifpour
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S Kondo
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B O'Hollaren
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T Morita
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R M Weiss
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Abstract

As age and sex affect the function of the lower urinary tract, we studied the characteristics of adrenergic and cholinergic receptors in various parts of lower urinary tract smooth muscle of young (6 months) and old (4 1/2-5 years) male and female rabbits. Saturation experiments performed with [3H]prazosin, [3H]yohimbine, [3H]dihydroalprenolol and [3H]quinuclidinyl benzylate in rabbit bladder base, bladder dome and urethra indicate the presence of regional, sex- and age-related differences in the density of alpha-1, alpha-2, and beta adrenergic and muscarinic cholinergic receptors. Alpha-2 adrenergic receptor density is considerably higher in the female than in the male urethra of both age groups, whereas the higher density of beta adrenergic receptors in the female than in the male bladder base is observed only in the younger animals. The density of muscarinic receptors is higher in bladder dome than in bladder base or urethra in young rabbits of both sexes. In the old animals, the density of muscarinic receptors in bladder base increases to the level observed in bladder dome. Inhibition experiments with selective adrenergic agonists and antagonists indicate that the pharmacological profiles of alpha-2 adrenergic receptors in the urethra and beta adrenergic receptors in the bladder dome and bladder base are similar in both sexes and at both ages. Beta-2 adrenergic receptors are shown to be predominant in bladder base and bladder dome of rabbits. Parallel studies in rabbit urethra, adult rat cortex and neonatal rat lung show that the urethral alpha-2 adrenergic receptors are of the alpha-2A subtype.

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Journal of Pharmacology and Experimental Therapeutics
Vol. 253, Issue 2
1 May 1990
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Abstract

Autonomic receptors in urinary tract: sex and age differences.

J Latifpour, S Kondo, B O'Hollaren, T Morita and R M Weiss
Journal of Pharmacology and Experimental Therapeutics May 1, 1990, 253 (2) 661-667;

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Abstract

Autonomic receptors in urinary tract: sex and age differences.

J Latifpour, S Kondo, B O'Hollaren, T Morita and R M Weiss
Journal of Pharmacology and Experimental Therapeutics May 1, 1990, 253 (2) 661-667;
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