Impact of Seminal Plasma Antioxidants on DNA Fragmentation and Lipid Peroxidation of Frozen-Thawed Horse Sperm
Catalán, Jaime (Universitat Autònoma de Barcelona. Departament de Medicina i Cirurgia Animals)
Yánez-Ortiz, Iván (Universidad Internacional de Ecuador)
Torres-Garrido, Marc (Universitat de Girona. Departament de Biologia)
Ribas-Maynou, Jordi (Universitat de Girona. Departament de Biologia)
Llavanera, Marc (Universitat de Girona. Departament de Biologia)
Barranco, Isabel (Universidad de Murcia. Departamento de Cirugía y Medicina Animal)
Yeste Oliveras, Marc (Institució Catalana de Recerca i Estudis Avançats)
Miró, Jordi (Universitat Autònoma de Barcelona. Departament de Medicina i Cirurgia Animals)

Data:	2024
Resum:	Cryopreservation is a stressful process for sperm, as it is associated with an increased production of reactive oxygen species (ROS). Elevated ROS levels, which create an imbalance with antioxidant capacity, may result in membrane lipid peroxidation (LPO), protein damage and DNA fragmentation. This study aimed to determine whether the membrane LPO and DNA fragmentation of frozen-thawed horse sperm relies upon antioxidant activity, including enzymes (superoxide dismutase (SOD), glutathione peroxidase (GPX), catalase (CAT) and paraoxonase type 1 (PON1)); non-enzymatic antioxidant capacity (Trolox-equivalent antioxidant capacity (TEAC), plasma ferric reducing antioxidant capacity (FRAP) and cupric reducing antioxidant capacity (CUPRAC)); and the oxidative stress index (OSI) of their seminal plasma (SP). Based on total motility and plasma membrane integrity (SYBR14 + /PI −) after thawing, ejaculates were hierarchically (p < 0. 001) clustered into two groups of good- (GFEs) and poor-(PFEs) freezability ejaculates. LPO and DNA fragmentation (global DNA breaks) were higher (p < 0. 05) in the PFE group than in the GFE group, with LPO and DNA fragmentation (global DNA breaks) after thawing showing a positive relationship (p < 0. 05) with SP OSI levels and ROS production. In addition, sperm motility and membrane integrity after thawing were negatively (p < 0. 05) correlated with the activity levels of SP antioxidants (PON1 and TEAC). The present results indicate that LPO and DNA fragmentation in frozen-thawed horse sperm vary between ejaculates. These differences could result from variations in the activity of antioxidants (PON1 and TEAC) and the balance between the oxidant and antioxidant components present in the SP.
Ajuts:	European Research Council RYC2021-034546-I Ministerio de Ciencia e Innovación PID2020-113320RB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017-SGR-1229 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021-SGR-00900
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Horse ; Semen ; Seminal plasma ; Sperm ; Cryopreservation ; Antioxidant ; DNA fragmentation ; Lipid peroxidation
Publicat a:	Antioxidants, Vol. 13 (march 2024) , ISSN 2076-3921

DOI: 10.3390/antiox13030322
PMID: 38539855

22 p, 3.0 MB

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