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      The Effect of Cannabis sativa Hydroalcoholic Extract on Sperm Parameters and Testis Histology in Rats Translated title: Efecto del Extracto Hidroalcohólico de Cannabis sativa sobre los Parámetros Espermáticos e Histología Testicular en Ratas

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          Abstract

          Cannabis Sativa is a multiuse herb in traditional medicine, its hydroalcoholic extract (10, 50, and 100 mg/kg) administered interaperitoneally for 14 consequent days to Wistar male rats resulted in significant decrease in progressive motility of sperm. Sperm count and seminiferous tubules diameter decreased significantly in comparison with control group. Also decrease in animal body weight in doses of 50 and 100 mg/kg was observed. Changes in testes weight and serum testosterone were not significant. Cannabis sativa extract has negative effect on sperm parameters such as motility, sperm count, and seminiferous tubules diameter.

          Translated abstract

          La Cannabis Sativa es una hierba de múltiples usos en la medicina tradicional. Su extracto hidroalcohólico (10, 50, y 100 mg/kg) administrado intraperito-nealmente durante 14 días consecutivos a ratas Wistar macho produjo una disminución significativa en la motilidad progresiva de los espermatozoides. El recuento de espermatozoides y el diámetro de los túbulos seminíferos se redujo significativamente en comparación con el grupo control. También se observó disminución del peso corporal de los animales en dosis de 50 y 100 mg/kg. Cambios en el peso de los testículos y la testosterona sérica no fueron significativos. El extracto de Cannabis sativa tiene un efecto negativo sobre los parámetros seminales tales como la motilidad, conteo espermático, y el diámetro de los túbulos seminíferos.

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          Most cited references 33

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          An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III

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            Male germline stem cells: from mice to men.

            The production of functional male gametes is dependent on the continuous activity of germline stem cells. The availability of a transplantation assay system to unequivocally identify male germline stem cells has allowed their in vitro culture, cryopreservation, and genetic modification. Moreover, the system has enabled the identification of conditions and factors involved in stem cell self-renewal, the foundation of spermatogenesis, and the production of spermatozoa. The increased knowledge about these cells is also of great potential practical value, for example, for the possible cryopreservation of stem cells from boys undergoing treatment for cancer to safeguard their germ line.
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              Human sperm express cannabinoid receptor Cb1, the activation of which inhibits motility, acrosome reaction, and mitochondrial function.

              Cannabinoids and endocannabinoids negatively influence sperm functions. These substances have been demonstrated in many mammalian tissues, including male and female reproductive tracts, and previous studies have shown the presence of functional receptors for cannabinoids in human sperm. The present study, by means of RT-PCR and Western blot techniques, demonstrates that human sperm express the CB(1), but not CB(2), cannabinoid receptor (CB-R) subtype located in the head and middle piece of the sperm. The activation of this receptor by anandamide reduces sperm motility and inhibits capacitation-induced acrosome reaction. Activation of the CB(1)-R did not induce any variation in sperm intracellular calcium concentrations, but produced a rapid plasma membrane hyperpolarization that was reduced by the K(+) channel blocker tetraethylammonium. The effects of anandamide on human sperm motility were dependent on the reduction of sperm mitochondrial activity as determined by rhodamine 123 fluorescence. The specificity of anandamide effects in human sperm were confirmed by the effects of the CB(1)-R antagonist SR141716. These findings provide additional evidence that human sperm express functional CB(1)-R, the activation of which negatively influences important sperm functions, and suggest a possible role for the cannabinoid system in the pathogenesis of some forms of male infertility.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                ijmorphol
                International Journal of Morphology
                Int. J. Morphol.
                Sociedad Chilena de Anatomía (Temuco )
                0717-9502
                March 2013
                : 31
                : 1
                : 82-86
                Affiliations
                [1 ] Kermanshah University of Medical Sciences Iran
                [2 ] University of Arak Iran
                Article
                S0717-95022013000100012
                10.4067/S0717-95022013000100012
                Product
                Product Information: website
                Categories
                ANATOMY & MORPHOLOGY

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