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Abstract
Alpha 1-adrenergic receptors play an important role in the transport of spermatozoa through seminiferous tubules to the efferent ducts leading to the epididymis. The density of alpha 1-adrenergic receptors in adult Sprague-Dawley rat testis before and during 14 days of experimental cryptorchidism was determined by binding assays with [3H]prazosin in membrane preparations. The number of maximal binding sites (Bmax) per milligram protein began to increase at 7 days after surgery (p < .05). The testicular weight and diameter of seminiferous tubules began to decrease at 5 days after surgery (p < .01). However, Bmax per testis did not differ before and during cryptorchidism. This study demonstrates that the density of alpha 1-adrenergic receptors in rat testis is not affected by cryptorchidism.
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