Manuel Barrientos-Morales

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Toxoplasma gondii infection in pigs has epidemiological concern for its contributing role in human infections. We determined seroprevalence of T. gondii infection in 402 domestic pigs raised in backyards in Veracruz State, Mexico using the modified agglutination test (MAT; cut off 1:25); 182 (45.3 %) of the 402 pigs were seropositive with MAT titers of 1:25(More)
The aim of this study was to determine whether in vitro boar sperm spontaneous acrosomal reaction is accompanied by changes on the Perinuclear Theca (PT) and to test the hypothesis that early changes in sperm PT-substructure integrity on frozen-thawed spermatozoa affects this process. Semen was collected thrice from six boars, making a total of 18(More)
A variety of ion channels are expressed in the plasma membrane of somatotropes within the anterior pituitary gland. Modification of these channels is linked to intracellular Ca2+ levels and therefore to hormone secretion. Previous investigations have shown that the gut-derived orexigenic peptide hormone ghrelin and synthetic GH-releasing peptides (GHRPs)(More)
Leptin, a peptide hormone produced by adipocytes, is recognized as one of the signals involved in the onset of reproductive activity. The leptin receptor has been found in hypothalamic neurons and pituitary gonadotropes, suggesting that the hormone may act at both sites to stimulate the secretion of GnRH and consequently, FSH and LH. In response to a(More)
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