title: Maternal nutrition during pregnancy is associated with differential expression of imprinted genes and DNA methyltranfereases in muscle of beef cattle offspring.
abstract: Maternal diet during pregnancy is a major determinant of the fetal developmental competence and may induce long-lasting epigenetic changes to the offspring. Imprinted genes have important roles in fetal programming, growth, and development. There are, however, limited data available on the influence of maternal diet on the expression of imprinted genes in beef cattle. Therefore, the objective of this study was to analyze the impact of maternal diet during pregnancy on the expression of 5 imprinted genes and 3 DNA methyltransferase genes in longissimus dorsi muscle from Angus calves. A total of 36 Angus-cross cows were inseminated to a single sire and on Day 135 of gestation they were randomly assigned to either low-starch (haylage) or high-starch (corn silage) diets. Diets were initially formulated to provide isocaloric and isonitrogenous intake. The H19, MEG8, IGF2R, and DNMT3a genes showed differential expression in longissimus dorsi muscle in calves between the diet groups. Given that high-starch diet is a source of energy for muscle growth and feed conversion efficiency in postnatal development, the mechanisms by which this diet affected expression of imprinted genes should be further explored.
authors.affiliation: College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi province, 712100, China Department of Animal Sciences, University of Wisconsin, Madison 53706.
authors.forename: X
authors.initials: X
authors.lastname: Wang
authors.affiliation: College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi province, 712100, China.
authors.forename: X
authors.initials: X
authors.lastname: Lan
authors.affiliation: University of Wisconsin - River Falls, River Falls 54022.
authors.forename: A E
authors.initials: AE
authors.lastname: Radunz
authors.affiliation: Department of Animal Sciences, University of Wisconsin, Madison 53706 hkhatib@wisc.edu.
authors.forename: H
authors.initials: H
authors.lastname: Khatib
mesh_terms: D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002417:Cattle / Q000502:physiology*; D015254:DNA Modification Methylases / Q000235:genetics / Q000378:metabolism*; D004032:Diet / Q000662:veterinary*; D005260:Female; D047109:Fetal Development; D005786:Gene Expression Regulation / Q000502:physiology*; D039382:Maternal Nutritional Physiological Phenomena; D018482:Muscle, Skeletal / Q000201:enzymology / Q000378:metabolism*; D011247:Pregnancy; D039401:Prenatal Nutritional Physiological Phenomena; D012820:Silage / Q000032:analysis*
chemical_list: D015254:DNA Modification Methylases
keywords: beef cattle; gene expression; imprinted gene; maternal nutrition