Factores relacionados con la dinámica folicular en la hembra bovina
Fecha
Autores
Tovío-Luna, Néstor I.
Duica-Amaya, Arturo
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Universidad Cooperativa de Colombia
Resumen
El sistema de desarrollo folicular ovárico en la hembra bovina se encuentra bajo el control del sistema endocrino y paracrino en el que intervienen las hormonas gonadotrópicas (FSH y LH), las citoquinas que actúan como mensajeros químicos, los factores de crecimiento, que favorecen varios procesos como la proliferación celular, las hormonas esteroides y otras moléculas reguladoras. El folículo ovárico experimenta una rápida proliferación celular durante su crecimiento temprano, el cual aparentemente es independiente de las gonadotropinas circulantes (FSH y LH), pero es susceptible a la acción de los factores de crecimiento, los cuales son sustancias de origen proteico que actúan por mecanismos autocrinos y paracrinos interviniendo en la actividad mitótica de la célula, desencadenando una proliferación, modelación y reorganización de los tejidos, como ocurre en las estructuras transitorias presentes en el ovario (cuerpos lúteos y folículos). De acuerdo con lo anterior se evidencia una serie de fenómenos y aspectos involucrados en el patrón de crecimiento de las ondas foliculares ováricas, lo que determina que constantemente se realicen revisiones actualizadas de literatura esto con la finalidad de poder comprender con mayor claridad el patrón dinámico de comportamiento que establece los fenómenos que se encuentran involucrados en la dinámica folicular en la hembra bovina, lo que determina la temática de la presente revisión de literatura.
The ovarian follicular development system in cows is controlled by endocrine and paracrine systems affected by gonadotropic hormones (FSH and LH), in which cytokines act as chemical messengers, as well as by growth factors (favoring multiple processes such as cell proliferation), steroid hormones and other regulatory molecules. The ovarian follicle undergoes rapid cell proliferation during its early growth, which apparently is independent of circulating gonadotropins (FSH and LH). It is susceptible to the action of growth factors, which are protein-based substances that act by means of autocrine and paracrine mechanisms that intervene in the mitotic activity of the cell, triggering the proliferation, modeling and reorganization of tissues, as in the transitory structures present in the ovary (corpus luteum and follicles). There is thus evidence of a series of phenomena and aspects involved in the growth pattern of ovarian follicular waves. This in turn leads to constant updated reviews of the literature with the aim of more clearly understanding the dynamic pattern of behavior that determines the phenomena involved in the follicular dynamic of female bovines, which is the subject of this review.
The ovarian follicular development system in cows is controlled by endocrine and paracrine systems affected by gonadotropic hormones (FSH and LH), in which cytokines act as chemical messengers, as well as by growth factors (favoring multiple processes such as cell proliferation), steroid hormones and other regulatory molecules. The ovarian follicle undergoes rapid cell proliferation during its early growth, which apparently is independent of circulating gonadotropins (FSH and LH). It is susceptible to the action of growth factors, which are protein-based substances that act by means of autocrine and paracrine mechanisms that intervene in the mitotic activity of the cell, triggering the proliferation, modeling and reorganization of tissues, as in the transitory structures present in the ovary (corpus luteum and follicles). There is thus evidence of a series of phenomena and aspects involved in the growth pattern of ovarian follicular waves. This in turn leads to constant updated reviews of the literature with the aim of more clearly understanding the dynamic pattern of behavior that determines the phenomena involved in the follicular dynamic of female bovines, which is the subject of this review.