Moringa Oleifera Leaves Extract Attenuates Male Sexual Dysfunction

American Journal of Neuroscience 01/2012; 3(1):17-24. DOI: 10.3844/amjnsp.2012.17.24


Problem statement: At present, the novel agent that is effective, cheap and easy to approach for treating male sexual dysfunction is required due to the current poor therapeutic efficacy. Though Moringa oleifera is reputed for aphrodisiac activity in traditional folklore, no scientific evidence is available. Therefore, we aimed to determine the effect of M.oleifera leaves extract on male sexual behaviors in animal model of sexual dysfunction. Moreover, the possible underlying mechanisms were also investigated. Approach: Male Wistar rats, weighing 200-250 g, had been orally given M.oleifera leaves extract at doses of 10, 50 and 250 mg kg −1 BW once daily at 30 min before the exposure to 12-h immobilization stress for 14 days. They were assessed male sexual behaviors including mounting, intromission and ejaculation numbers and latencies after single administration and every 7 days until the end of experiment. To further investigate the possible mechanisms of action, we also determined serum testosterone level of all rats at the end of experiment together with the determination of suppression effect of the plant extract on MAO B and PDE-5 activities. Results: The results showed that after single administration, rats subjected to M.oleifera extract at dose of 10 mg kg −1 BW significantly enhanced mounting number. When the treatment was prolonged to 7 days rats subjected to the low dose of extract showed the enhanced intromission number whereas rats subjected to high dose of extract showed the enhanced mounting number. Our data also showed no significant change in serum testosterone level. However, the extract could also suppress MAO B and PDE-5 activities. Taken all together, the extract could enhance male sexual desire and performance via the suppression of MAO B and PDE-5 activities. Conclusion: M.oleifera can be the potential sexual enhancer particularly for acute and short term application. However, further researches are necessary.

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Available from: Sitthichai Iamsaard,
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    ABSTRACT: Aphrodisiacs are required to improve male sexual function under stressful conditions. Due to the effects of oxidative stress and dopamine on male sexual function, we hypothesized that Moringa oleifera leaves might improve male sexual dysfunction induced by stress. Therefore, the effects on various factors playing important roles in male sexual behavior, such as antioxidant effects, the suppression of monoamine and phosphodiesterase type 5 (PDE-5) activities, serum testosterone and corticosterone levels, and histomorphological changes in the testes, of a hydroethanolic extract of M. oleifera leaves were investigated. Various doses of extract including 10, 50, and 250 mg/kg body weight (BW) were given orally to male Wistar rats before exposure to 12 h-immobilization stress for 7 d. The results demonstrated that the extract showed both antioxidant and monoamine oxidase type B (MAO-B) suppression activities. At 7 d of treatment, the low dose of extract improved sexual performance in stress-exposed rats by decreasing intromission latency and increasing intromission frequency. It also suppressed PDE-5 activity, decreased serum corticosterone level, but increased serum testosterone, numbers of interstitial cells of Leydig and spermatozoa. The increased numbers of interstitial cells of Leydig and spermatozoa might have been due to the antioxidant effect of the extract. The increased sexual performance during the intromission phase might have been due to the suppression of MAO-B and PDE-5 activities and increased testosterone. Therefore, M. oleifera is a potential aphrodisiac, but further research concerning the precise underlying mechanisms is still needed.
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