Seasonal variations of melatonin in ram seminal plasma are correlated to those of testosterone and antioxidant enzymes |
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| Authors: | Adriana Casao Igor Cebrián Mayra Eoda Asumpção Rosaura Pérez-Pé José A Abecia Fernando Forcada José A Cebrián-Pérez Teresa Muiño-Blanco |
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| Institution: | 1.Departamento de Bioquímica y Biología Molecular y Celular,,Grupo Biología y Fisiología de la Reproduction (BIOFREZ), Instituto Universitario de Investigation en Ciencias Ambientales de Aragón (IUCA), Facultad de Veterinaria, Universidad de Zaragoza,,Spain;2.Departamento de Fisiologìa,,Facultad de Ciencias de la Salud y del Deporte. Universidad de Zaragoza,,Spain;3.Departamento de Reprodu??o Animal de la Facultade de Medicina Veterinaria de la Universidade de Sao Paulo,,Brasil;4.Departamento de Production Animal y Ciencia de los Alimentos, Grupo Biologìa y Fisiología de la Reproducción (BIOFREZ),,Instituto Universitario de Investigación en Ciencias Ambientales de Aragón (IUCA), Facultad de Veterinaria, Universidad de Zaragoza,,Spain |
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| Abstract: | Background Some breeds of sheep are highly seasonal in terms of reproductive capability, and these changes are regulated by photoperiod
and melatonin secretion. These changes affect the reproductive performance of rams, impairing semen quality and modifying
hormonal profiles. Also, the antioxidant defence systems seem to be modulated by melatonin secretion, and shows seasonal variations.
The aim of this study was to investigate the presence of melatonin and testosterone in ram seminal plasma and their variations
between the breeding and non-breeding seasons. In addition, we analyzed the possible correlations between these hormones and
the antioxidant enzyme defence system activity. |
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