title: Protective effects of leucine on redox status and mitochondrial-related gene abundance in the jejunum of intrauterine growth-retarded piglets during early weaning period.
abstract: The aim of this study was to investigate the effects of dietary supplementation with 0.35% l-leucine on redox status and gene abundance relating to mitochondrial biogenesis and function in the jejunum of intrauterine growth-retarded (IUGR) piglets during early weaning period. According to a 2 × 2 factorial arrangement, 16 IUGR and 16 normal body weight (NBW) piglets were fed a basal diet without l-leucine supplementation or a basal diet plus 0.35% l-leucine supplementation from the age of 14 to 35 d. The results showed that compared with NBW piglets, IUGR piglets had a lower (p < 0.05) jejunal DNA concentration, a reduced (p < 0.05) manganese superoxide dismutase (MnSOD) and total antioxidant capability (T-AOC) activities and mitochondrial DNA content in the jejunum. Leucine supplementation increased (p < 0.05) MnSOD and T-AOC activities and decreased (p < 0.05) the malondialdehyde content in the jejunum of IUGR piglets. The mRNA gene abundance of nuclear respiratory factor-1 (NRF1), mitochondrial transcription factor A (TFAM), ATP synthase (ATPs), cytochrome c oxidase V (CcOX V), cytochrome c and glucokinase in the jejunum of IUGR piglets was reduced (p < 0.05) compared with NBW piglets. However, NRF1, peroxisome proliferation-activated receptor gamma coactivator-1 alpha, TFAM, ATPs and CcOX I mRNA gene abundance in the jejunum of IUGR piglets were increased (p < 0.05) by diets supplemented with leucine. These data indicate that leucine supplementation has therapeutic potential for attenuating intestinal oxidative stress and mitochondrial dysfunction in IUGR piglets during the early period of life via increasing enzyme activities and up-regulating mRNA gene abundance.
authors.affiliation: a Department of Animal Nutrition and Feed Science , College of Animal Science and Technology, Nanjing Agricultural University , Nanjing , China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Huang
authors.affiliation: a Department of Animal Nutrition and Feed Science , College of Animal Science and Technology, Nanjing Agricultural University , Nanjing , China.
authors.forename: Wen
authors.initials: W
authors.lastname: Xu
authors.affiliation: a Department of Animal Nutrition and Feed Science , College of Animal Science and Technology, Nanjing Agricultural University , Nanjing , China.
authors.forename: Kai-Wen
authors.initials: KW
authors.lastname: Bai
authors.affiliation: a Department of Animal Nutrition and Feed Science , College of Animal Science and Technology, Nanjing Agricultural University , Nanjing , China.
authors.forename: Jin-Tian
authors.initials: JT
authors.lastname: He
authors.affiliation: a Department of Animal Nutrition and Feed Science , College of Animal Science and Technology, Nanjing Agricultural University , Nanjing , China.
authors.forename: Hussain
authors.initials: H
authors.lastname: Ahmad
authors.affiliation: a Department of Animal Nutrition and Feed Science , College of Animal Science and Technology, Nanjing Agricultural University , Nanjing , China.
authors.forename: Le
authors.initials: L
authors.lastname: Zhou
authors.affiliation: a Department of Animal Nutrition and Feed Science , College of Animal Science and Technology, Nanjing Agricultural University , Nanjing , China.
authors.forename: Li-Li
authors.initials: LL
authors.lastname: Zhang
authors.affiliation: a Department of Animal Nutrition and Feed Science , College of Animal Science and Technology, Nanjing Agricultural University , Nanjing , China.
authors.forename: Tian
authors.initials: T
authors.lastname: Wang
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000822:Animal Husbandry; D000818:Animals; D000975:Antioxidants / Q000378:metabolism*; D004272:DNA, Mitochondrial / Q000378:metabolism*; D004032:Diet / Q000662:veterinary; D019587:Dietary Supplements / Q000032:analysis; D005317:Fetal Growth Retardation / Q000188:drug therapy / Q000662:veterinary*; D007583:Jejunum / Q000378:metabolism; D007930:Leucine / Q000008:administration & dosage*; D008297:Male; D010084:Oxidation-Reduction; D013552:Swine; D013553:Swine Diseases / Q000188:drug therapy*; D014886:Weaning
chemical_list: D000975:Antioxidants; D004272:DNA, Mitochondrial; D007930:Leucine
keywords: Early weaning; growth retardation; leucine; mitochondria; piglets; prenatal development; redox enzymes