Abstract:
:The experiment was conducted to investigate the protective effects of different sources of maternal selenium (Se) on oxidative stressed chick embryo. A total of 270 Lingnan Yellow broiler breeders were randomly allocated into three treatments with five replicates for 18 birds each. Breeders were fed with basal diet (BD) including 0.04 mg/kg Se or BD supplemented with sodium selenite (SS) or selenomethionine (SM) at a level of 0.15 mg Se/kg. The rearing experiment lasted for 8 weeks after an 8-week pre-test. Twenty eggs were collected from each replicate during the last 10-day, then incubated in a commercial incubator. On embryonic 17th, fertile eggs were transferred into 39.5 °C temperature stimulation for 6 h. Afterward, five eggs were randomly selected from each replicate for collecting chick embryo sample. The results showed that Se supplementation in the diet of breeders resulted in lower reactive oxygen species (ROS), heat shock protein 70 (HSP70), malondialdehyde (MDA), carbonyl and 8-hydroxydeoxyguanosine (8-OHdG) concentrations and higher glutathione peroxidase (GPx), total superoxide dismutase (T-SOD), and catalase (CAT) activities in heat stress treated chick embryo (P < 0.05), and ROS, MDA, carbonyl, 8-OHdG concentrations in SM treatment were lower than those in SS treatment (P < 0.05). Se supplementation elevated cellular glutathione peroxidase (GPx1) mRNA level and activity, cytoplasmic thioredoxin reductase (TrxR1) activity and selenoprotein P (SelP) mRNA and protein level (P < 0.05), and maternal SM showed a higher value than maternal SS in upregulating GPx1, TrxR1, and SelP mRNA levels as well as GPx1 and TrxR1 activities or SelP protein level (P < 0.05). This study indicated that maternal Se can enhance antioxidative capacity and reduce ROS concentration and oxidative damage by upregulating the expression of antioxidative selenoprotein, and maternal SM is superior to SS in heat stress treated chick embryo.
journal_name
Biol Trace Elem Resjournal_title
Biological trace element researchauthors
Xiao X,Yuan D,Wang YX,Zhan XAdoi
10.1007/s12011-015-0541-ysubject
Has Abstractpub_date
2016-07-01 00:00:00pages
201-208issue
1eissn
0163-4984issn
1559-0720pii
10.1007/s12011-015-0541-yjournal_volume
172pub_type
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