Does lipid peroxidation and oxidative DNA damage differ in Cheok rot cryopreserved semen samples from young, adult and aged Nellore bulls?

Autor(es)

Trevizan, Juliane Teramachi ^[1] ; Carreira, Janaina Torres ^[1] ; Carvalho, Isadora Resende ^[1] ; Kipper, Bruna Helena ^[1] ; Nagata, Walter Bertequine ^[2] ; Venturoli Perri, Silvia Helena ^[2] ; Franco Oliveira, Maria Emilia ^[3] ; Pierucci, Julia Cestari ^[3] ; de Koivisto, Marion Burkhardt ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Dept Med Surg & Anim Reprod, Sch Vet Med, BR-16050680 Sao Paulo - Brazil

^[2] Sao Paulo State Univ UNESP, Dept Support Prod & Anim Hlth, Sch Vet Med, BR-16050680 Sao Paulo - Brazil

^[3] Sao Paulo State Univ UNESP, Dept Preventat Vet Med & Anim Reprod, Sch Agr & Vet Sci, BR-14884900 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Animal Reproduction Science; v. 195, p. 8-15, AUG 2018.
• Citações Web of Science: 1

Resumo

The aims of this study were to evaluate cryopreserved semen of Nellore bulls of different ages and verify whether sperm quality declines with advancing age and whether lipid peroxidation and DNA damage are involved in this process. For this purpose, 40 Nellore bulls were divided into three age groups: Young, aged 1.8-2 years (n = 9); Adult, aged 3.5-7.0 years (n = 19); and Seniors, aged 8.0-14.3 years (n = 12). Three ejaculates were collected from each bull, cryopreserved and evaluated for various parameters including membrane integrity, mitochondrial potential (FITC-PSA and JC1), lipid peroxidation (C-11BODIPY 581 / 591) and oxidative DNA damage (8OHdG) using flow cytometry. The thawed semen of senior bulls was characterized by a low percentage of motile sperm (33.7 +/- 6.1%), higher damage to the plasma and acrosomal membrane (37.5 +/- 9.8%), and low mitochondrial potential (29.1 +/- 13.8%), as well as higher percentages of peroxidated cells (53.6 +/- 12.2%) and DNA damage (44.1 +/- 11.0%; P < 0.05). Lipid peroxidation was negatively correlated with motility (r = -0.35, P < 0.0002), average mitochondrial potential (r = -0.42; P < 0.0001) and showed a positive correlation with membrane injury and oxidative DNA damage (r = 039; P = 0.0003). Young bulls presented superior thawed sperm quality, possibly due to greater resistance to oxidative stress and, consequently, to cryopreservation. In conclusion, the sperm quality of bull semen declines with advancing age and is strongly associated with increased oxidative damage to both the plasma membrane and DNA. (AU)

• Processo FAPESP: 11/16614-2 - Influência dos danos oxidativos na qualidade de espermática em bovinos de diferentes idades.
• Beneficiário: Juliane Teramachi Trevizan
• Modalidade de apoio: Bolsas no Brasil - Mestrado