Journal of Andrology
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Journal of Andrology, Vol. 26, No. 5, September/October 2005
Copyright © American Society of Andrology
DOI: 10.2164/jandrol.04168

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Impaired Sperm Function After Spinal Cord Injury in the Rat Is Associated With Altered Cyclic Adenosine Monophosphate Signaling

SHULUN WANG*, GUICHUN WANG*, BEVERLY E. BARTON*, THOMAS F. MURPHY* AND HOSEA F. S. HUANG*,{dagger}

From the * Department of Surgery Division of Urology, University of Medicine & Dentistry, New Jersey Medical School, Newark, New Jersey; and the {dagger} Department of Veterans Affairs Medical Center, East Orange, New Jersey.

Correspondence to: H.F.S. Huang, Department of Surgery, Division of Urology, UMD-New Jersey Medical School, 185 South Orange Avenue, Newark, NJ 07103 (e-mail: huanghf{at}umdnj.edu).


Our previous observations of changes in the expression of cAMP-dependent genes and the cAMP-responsive element modulator (CREM) in rat testicular cells after spinal cord injury (SCI) implied abnormal cAMP signaling as one of the mechanisms underlying the effects of SCI on spermatogenesis. It was postulated that such effects might contribute to abnormal sperm function after SCI. In this study, we examined this possibility. In spinal cord-contused (SCC) and -transected (SCX) rats, impaired sperm motility was accompanied by an increase in sperm cAMP content. Treatment of SCX rats with exogenous testosterone or follicle-stimulating hormone resulted in a further decrease in sperm motility, whereas sperm cAMP either increased or remained unchanged. These effects differed from those in sham control rats that received identical treatments. Results of these experiments also demonstrated that impaired sperm motility in SCC and SCX rats was accompanied by decreases in sperm viability and mitochondrial potential, thus suggesting a possible link between these changes. We concluded that impaired sperm motility after SCI was associated with decreases in sperm viability and mitochondrial potential. These effects occurred in the face of elevated sperm cAMP content and changes in its regulation, suggesting that altered cAMP signaling events might contribute to impairment of sperm motility and perhaps other sperm functions after SCI.

     Key words: cAMP, SYBR-14, JC-1




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S. Wang, G. Wang, B. E. Barton, T. F. Murphy, and H. F. S. Huang
Beneficial Effects of Vitamin E in Sperm Functions in the Rat After Spinal Cord Injury
J Androl, March 1, 2007; 28(2): 334 - 341.
[Abstract] [Full Text] [PDF]


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