The surface of the spermatozoa is coated with glycoproteins, the redistribution of which during in vitro capacitation plays a vital role in the subsequent fertilization process. Lipid rafts are membrane microdomains involved in signal transduction through receptors and include or recruit specific types of proteins and glycoproteins. Few studies have...
This study was designed to evaluate the effects of freezing sperm in pigs and sheep obtained from different commercial farms, which were frozen with cryoprotectants and then were thawed. The parameters of viability, motility and acrosome integrity were evaluated before and after freezing in both species, where the percentages obtained...
The mechanism of reproduction in mammals is very complex and in some cases is quite particular. For exampble in some bat species, the male presents a reproductive mechanism characterized by an anual testicular cycle that goes from recrudescence to regression (spermatogenesis to inactivity period, respectively). After recrudescence, the spermatozoa arrive...
El proceso de fertilización se caracteriza por una serie de eventos que ocurren tanto en el ovocito como en el espermatozoide, que conducen a la formación del cigoto y finaliza con la formación de un nuevo individuo. Los espermatozoides deben pasar por una serie de eventos moleculares, llamados globalmente capacitación....