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001-es BibID:BIBFORM107693
Első szerző:Ortega, Arth David Sol Valmoria (PhD student)
Cím:Effects of heat stress-induced oxidative stress on the reproduction of sows and its alleviation by dietary antioxidants: a review / Ortega Arth David Sol Valmoria, Xayalath Somsy, Lugata James Kachunhwa, Szabó Csaba
Megjegyzések:Sows are susceptible to high ambient temperature, and when it exceeds the level of their thermal comfort, they experience heat stress (HS). HS causes overproduction and accumulation of reactive oxygen species (ROS) in cells and can disturb the animals' antioxidant defense system, leading to oxidative stress (OS). Such stressor causes oxidative damage to proteins, lipids, polysaccharides, and DNA in cells and tissue damage. HS-induced OS also harms the sows' reproductive development. It can negatively affect the physiological process of the animals' reproduction from the maturation of oocytes to fertilization, development of the embryo, and pregnancy. It even extends to their reproductive performance. Although HS harms female reproduction, information regarding its induced stressor (OS) as the significant contributor to sows' reduced reproductive performance is limited. Therefore, this paper aims to review the effects of HS-induced OS on the reproductive performance of sows, and with due consideration to its nature, this work will also look into the effectiveness of dietary antioxidants against its adverse effects. Based on the literature, sows exposed to HS had increased plasma concentration of OS biomarkers (malondialdehyde, protein carbonyl, and 8-hydroxy-deoxyguanosine) and reduced activity of endogenous antioxidants, signifying OS. This resulted in reduced reproductive performance of sows, including lower litter weight at birth and a higher number of low birth weight piglets (higher variance) which causes high pre-weaning mortality. Moreover, the sows' colostrum, milk yield, and nutrient concentration are reduced upon exposure to the said stressor. Based on the information from various researches, dietary supplementation of antioxidants (vitamin C, E, and minerals Se and Zn) through the diet at various stages of sows' life could ameliorate HS-induced OS. Such amelioration can be supported by several researches which reported improvement in the sows' antioxidant status by increased activity of endogenous antioxidants (SOD, CAT, and GSH-Px) and subsequently improving their reproductive performance. Based on the information gathered, the enhancement of the antioxidant status and improvement of the sows' reproductive performance was exhibited when dietary levels of antioxidants are supplemented at high levels, suggesting the importance of regulating the dietary antioxidant levels in the diet upon HS challenge.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok előadáskivonat
Megjelenés:XXV. Tavaszi Szél Konferencia 2022 : Absztraktkötet / szerk. Molnár Dániel, Molnár Dóra. - p. 72-73. -
További szerzők:Xayalath, Somsy (1982-)(PhD hallgató) Lugata, James Kachungwa (1992-) (Ph.D hallgató) Szabó Csaba (1968-) (agrármérnök)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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