Study of the gene expression associated to fatty acid profile in Nellore cattle feedlot

Author(s)

Bruno Lapo Utembergue

• Document type: Master's Dissertation
• Press: Pirassununga.
• Institution: Universidade de São Paulo (USP). Faculdade de Medicina Veterinária e Zootecnia (FMVZ/SBD)
• Defense date: 2014-07-11

Examining board members

Angélica Simone Cravo Pereira; Henrique Nunes de Oliveira; Luis Felipe Prada e Silva

• Advisor: Angélica Simone Cravo Pereira

Abstract

Recently, the importance of fatty acids on meat and milk has been highlighted, especially those that could affect human health. The fat deposition, and its composition, is a result of the interaction between genotypic and phenotypic factors. In this way, the continuous genetic improvement, with the selection of some genes, can influence the quality of the product acquired by the consumers. The aim of this study was evaluate the patterns of expression of differentially expressed genes related to the fatty acid profile of Nellore cattle feedlot, by verifying the patterns of expression of genes involved in lipid metabolism and in the synthesis of fatty acids palmitic (C16: 0), stearic (C18: 0), oleic (C18: 1 cis-9), linoleic (C18: 2 cis-cis- 9-12), CLA (C18: 2 cis-9 trans-11) and linolenic acid (C18: 3). Forty-eight bovine, male, Nellore, with an average age of 24 months, from which were collected samples of Longissimus Muscle to carry out the analysis. There were a total of 1173 differentially expressed genes between groups of low and high concentration of each of the fatty acids. Differentially expressed genes identified in Longissimus were ACAT1 ACOX2, ACOT11, ACSM3, AGPAT6, BDH1, ACSS1, CIQTNF3, CYP4B1, DGAT2, FABP3, FABP4, FABP7, GK, IGF2, LCAT, LIPE (HSL), LPL, PLIN1, PLIN5, SCD5 and SLC27A6, that are related to metabolic pathways of fatty acids or the adjacent pathways, and may influence on meat lipid profile. Studies with RNAseq involving fatty acid profile in meat are still rare, especially in Zebu cattle, in which there are no reports. In this way, further studies are still needed in order to clarify how certain genes can influence the desired characteristics, for instance, the fatty acid profile of intramuscular fat content. (AU)

• FAPESP's process: 12/15098-3 - STUDY OF THE GENE EXPRESSION ASSOCIATED TO FATTY ACID PROFILE IN NELORE CATTLE FEEDLOT
• Grantee: Bruno Lapo Utembergue
• Support Opportunities: Scholarships in Brazil - Master