Valquiria Hyppolito Barnabé

• Abstract

  The creation of horses has been actively developed in Brazil, so the owners' interest in equine reproductive biotechnologies is increasing, such as artificial insemination (AI) with fresh, cooled and frozen semen. However, the equine semen during handling lose quality and fertility, and oxidative stress an important cause of damage to the sperm cell. Seminal plasma has protective effects …

  Identification and quantification of carnosine in seminal plasma, seminal characteristics and freezability in stallion semen, AP.R

• Abstract

  Oxytocin, widely studied in females, now has been the focus for the male reproductive system due to the proposed participation in the processes of spermatogenesis, erection and ejaculation. Thus, this study aims to correlate the immunolocalization of oxytocin receptors in the testicles of dogs with the data obtained from the semen analysis, testicular gene and protein expression of this r…

  Correlation between oxytocin receptors expression (OTR) in the testicles and epididymis in dogs and semen quality, AP.R

• Abstract

  One of the reasons for the lower fertility in European bulls bred in tropical regions for bulls Bos indicus is a higher rate of oxidative stress caused by increased production of reactive oxygen species (ROS), not compensated by antioxidant protection. Moreover, it is known that the sperm cell is highly susceptible to oxidative stress due to the high amount of poly-unsaturated fatty acids…

  Effect of systemic and sperm samples treatment with antioxidants from bulls Bos taurus under heat stress and supplemented with diet rich in poly-unsaturated fatty acids, AP.R

(Only some records are available in English at this moment)

• Abstract

  Oxytocin, widely studied in females, now has been the focus for the male reproductive system due to the proposed participation in the processes of spermatogenesis, erection and ejaculation. Thus, this study aims to correlate the immunolocalization of oxytocin receptors in the testicles of dogs with the data obtained from the semen analysis, testicular gene and protein expression of this r…

  Correlation between oxytocin receptors expression (OTR) in the testicles and epididymis in dogs and semen quality, BP.DR

• Abstract

  One of the reasons for the lower fertility in European bulls bred in tropical regions for bulls Bos indicus is a higher rate of oxidative stress caused by increased production of reactive oxygen species (ROS), not compensated by antioxidant protection. Moreover, it is known that the sperm cell is highly susceptible to oxidative stress due to the high amount of poly-unsaturated fatty acids…

  Effect of systemic and sperm samples treatment with antioxidants from bulls Bos taurus under heat stress and supplemented with diet rich in poly-unsaturated fatty acids, BP.PD

• Abstract

  The molecular events of sperm-oocyte binding and fusion have been studied extensively, but identification of the molecules involved in sperm-oocyte interaction remains incomplete. Integrins are a family of heterodimeric cell adhesion molecules that mediate cell-cell and cell-extracellular matrix interactions. Although integrins have associated with the plasma membrane of some mammal oocyt…

  Importance of integrins as oocytes and/or sperm adhesion molecule during fertilization and their relationship with bull fertility, BP.PD

(Only some records are available in English at this moment)