Journal ArticleDOI
Roles of Antioxidants on Prolonged Storage of Avian Spermatozoa In Vivo and In Vitro
TLDR
Dietary supplementation with vitamin E is effective in limiting lipid peroxidation of sperm plasma membranes, both in chickens and turkeys, and organic Se with or without vitamin E stimulates Se‐GSH‐Px activity in seminal plasma.Abstract:
This review focuses on natural and assisted prevention against lipid peroxidation in avian spermatozoa. The presence of high levels of n-6 polyunsaturated fatty acids (PUFAs) in the plasma membrane creates favorable conditions for the formation of peroxidative products, a major cause of membrane damage which may ultimately impair male fertility. However, a complex antioxidant system involving vitamin C, vitamin E and GSH is naturally present in avian semen. Coupled with a battery of enzymatic defenses (e.g., SOD, GSH-Px either Se- or non-Se-dependent), this system acts to prevent or restrict the formation and propagation of peroxides. The presence of specialized sites dedicated to prolonged sperm storage in avian females raises the question of durable protection of sperm membranes against peroxidation. Preliminary observations have revealed the presence of a specific antioxidant system at these sites in which vitamin C could exert a major role. From a practical standpoint, the extensive use of artificial insemination in poultry, along with the emergence in some species of workable techniques to cryopreserve spermatozoa, demand better control of peroxidation occurring in the plasma membrane of spermatozoa before or during storage. Dietary supplementation with vitamin E is effective in limiting lipid peroxidation of sperm plasma membranes, both in chickens and turkeys. In addition, organic Se with or without vitamin E stimulates Se-GSH-Px activity in seminal plasma. Preliminary observations in female chickens have also revealed the effectiveness of dietary supplementation with vitamin E, organic selenium or both to sustain fertility in aging flocks.read more
Citations
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Journal ArticleDOI
Effects of adding different levels of Glutamine to modified Beltsville extender on the survival of frozen rooster semen
TL;DR: It is suggested that the addition of glutamine to the diluent improves semen quality and using glutamine allows rooster sperm to be frozen for longer.
Journal ArticleDOI
Supplementation of Avian Semen Extenders with Antioxidants to Improve Semen Quality—Is It an Effective Strategy?
TL;DR: In this article, a review of the antioxidant system characteristics of avian semen is presented, focusing on enzymes, vitamins, amino acids, proteins, some plant extracts and other compounds that can be used to supplement the extenders to reduce the formation of oxidants in poultry semen and maintain its quality and enhance its fertility.
Journal ArticleDOI
Differential proliferation and metabolic activity of Sertoli cells in the testes of broiler and layer breeder chickens.
Melanie Faure,Edith Guibert,Sabine Crochet,Pascal Chartrin,Jean-Pierre Brillard,Anne Collin,Pascal Froment +6 more
TL;DR: The results suggest that the metabolic activity of testicular tissues is different in the layer and broiler breeder chickens, and the testis from broiler‐type chickens seems to be more sensitive to oxidative stress due to the lower global antioxidant capacity compared to layer‐ type chickens.
The role of antioxidants in reproduction and fertility of poultry.
TL;DR: A great body of evidence indicates that replacement of sodium selenite in the poultry diet by organic Se, in the form of Sel-Plex, can help to meet the optimal Se requirement and to increase fertility and hatchability.
Journal ArticleDOI
Male reproductive ageing: a tale of the whole ejaculate
Claudia Fricke,Mareike Koppik +1 more
TL;DR: First studies accrue and it is highlighted that changes in the non-sperm fraction can explain substantial variation in senescent male reproductive success and male ability to induce post-mating responses necessary for fertilization many open questions still remain that warrant further investigations.
References
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Journal ArticleDOI
Reactive oxygen species and human spermatozoa. I. Effects on the motility of intact spermatozoa and on sperm axonemes.
E. de Lamirande,Claude Gagnon +1 more
TL;DR: The data suggest that ROS induce a chain of events leading to sperm immobilization, that axonemes are affected, and that limited endogenous repair mechanisms exist to reverse these damages.
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Role of glutathione peroxidase in protecting mammalian spermatozoa from loss of motility caused by spontaneous lipid peroxidation.
Juan G. Alvarez,Bayard T. Storey +1 more
TL;DR: A mechanism for spontaneous lipid peroxidation in mammalian sperm is postulated which involves reaction of lipid hydroperoxide and O2 as the rate-determining step and the key intermediate is lipid hydro peroxide generated by a chain reaction initiated by and utilizing superoxide.
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Lipid composition and thermotropic phase behavior of boar, bull, stallion, and rooster sperm membranes.
John E. Parks,Daniel V. Lynch +1 more
TL;DR: A difference in both composition and thermotropic phase behavior of glycolipids between rooster and mammalian sperm is demonstrated which may be related to the greater tolerance of rooster sperm to rapid cooling.
Journal ArticleDOI
Lipid peroxidation in human spermatozoa as related to midpiece abnormalities and motility.
TL;DR: The results suggest that poor motility is linked with membrane fragility and that spermatozoa with midpiece abnormalities probably have membrane and/or cytoplasmic antiperoxidant system defects.