Abstract
Previous studies have identified that diabetic erectile dysfunction is associated with androgen and nitric oxide deficiency resulting from hyperglycemia. It has been demonstrated that taurine can stimulate testosterone secretion, increase nitric oxide synthase (NOS) activity and nitric oxide (NO) production, and reduce blood glucose levels in the diabetic animals. Furthermore, recent studies have found that taurine relaxes both the corpus cavernosum and the vasculature. Accordingly, we hypothesized that taurine might exert beneficial effects on erectile function of the diabetic rats. Here, we assessed the effects of taurine on sexual function in streptozotocin (STZ) -induced diabetic male rats. We observed that taurine treatment could markedly increase sexual response and mating ability of STZ-diabetic rats. The serum concentration of gonadotropin-releasing hormone (GnRH), luteinizing hormone (LH), follicle-stimulating hormone (FSH) and testosterone (T) were also significantly increased by taurine administration. Importantly, taurine supplementation notably increased mRNA levels and activity of endothelial NOS (eNOS) and neuronal NOS (nNOS), as well as NO and cGMP content, in the corpus cavernosum of the diabetic rats. In conclusion, the present data indicate that taurine can increase sexual function of STZ-induced diabetic male rats mainly by correcting the diabetes, increasing sexual desire, which is implicated in ameliorating the hypothalamic-pituitary-testicular axis function, and by improving penile erection, which requires increased signaling from the penile endothelial- and neuronal-dependent NO-cGMP pathway.
$Jiancheng Yang and Shumei Lin are contributed equally to this work.
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- cGMP:
-
Cyclic guanosine monophosphate
- EJF:
-
Ejaculation frequency
- EL:
-
Erection latency
- eNOS:
-
Endothelial NOS
- ERF:
-
Erection frequency
- FSH:
-
Follicle-stimulating hormone
- GnRH:
-
Gonadotropin-releasing hormone
- HbA1c:
-
Glycosylated hemoglobin
- IF:
-
Intromission frequency
- iNOS:
-
Inducible NOS
- LH:
-
Luteinizing hormone
- MF:
-
Mount frequency
- ML:
-
Mount latency
- NANC:
-
Non-adrenergic and non-cholinergic
- nNOS:
-
Neuronal NOS
- NO:
-
Nitric oxide
- NOS:
-
Nitric oxide synthase
- STZ:
-
Streptozotocin
- T:
-
Testosterone
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (No. 31272522, 31402160 and 31004042) and Program for Liaoning Excellent Talents in University (No. LJQ2014073).
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Yang, J. et al. (2017). Taurine Improves Sexual Function in Streptozotocin-Induced Diabetic Rats. In: Lee, DH., Schaffer, S.W., Park, E., Kim, H.W. (eds) Taurine 10. Advances in Experimental Medicine and Biology, vol 975. Springer, Dordrecht. https://doi.org/10.1007/978-94-024-1079-2_27
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DOI: https://doi.org/10.1007/978-94-024-1079-2_27
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