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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Liver transcriptomic networks reveal main biological processes associated with feed efficiency in beef cattle

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Alexandre, Pamela A. [1, 2] ; Kogelman, Lisette J. A. [1] ; Santana, Miguel H. A. [2] ; Passarelli, Danielle [2] ; Pulz, Lidia H. [2] ; Fantinato-Neto, Paulo [2] ; Silva, Paulo L. [3] ; Leme, Paulo R. [3] ; Strefezzi, Ricardo F. [2] ; Coutinho, Luiz L. [4] ; Ferraz, Jose B. S. [2] ; Eler, Joanie P. [2] ; Kadarmideen, Haja N. [1] ; Fukumasu, Heidge [2]
Total Authors: 14
[1] Univ Copenhagen, Fac Hlth & Med Sci, Dept Vet Clin & Anim Sci, Copenhagen - Denmark
[2] Univ Sao Paulo, Sch Anim Sci & Food Engn, Dept Vet Med, BR-13635900 Sao Paulo - Brazil
[3] Univ Sao Paulo, Sch Anim Sci & Food Engn, Dept Anim Sci, Sao Paulo - Brazil
[4] Univ Sao Paulo, ESALQ, Dept Anim Sci, Sao Paulo - Brazil
Total Affiliations: 4
Document type: Journal article
Source: BMC Genomics; v. 16, DEC 18 2015.
Web of Science Citations: 41

Background: The selection of beef cattle for feed efficiency (FE) traits is very important not only for productive and economic efficiency but also for reduced environmental impact of livestock. Considering that FE is multifactorial and expensive to measure, the aim of this study was to identify biological functions and regulatory genes associated with this phenotype. Results: Eight genes were differentially expressed between high and low feed efficient animals (HFE and LFE, respectively). Co-expression analyses identified 34 gene modules of which 4 were strongly associated with FE traits. They were mainly enriched for inflammatory response or inflammation-related terms. We also identified 463 differentially co-expressed genes which were functionally enriched for immune response and lipid metabolism. A total of 8 key regulators of gene expression profiles affecting FE were found. The LFE animals had higher feed intake and increased subcutaneous and visceral fat deposition. In addition, LFE animals showed higher levels of serum cholesterol and liver injury biomarker GGT. Histopathology of the liver showed higher percentage of periportal inflammation with mononuclear infiltrate. Conclusion: Liver transcriptomic network analysis coupled with other results demonstrated that LFE animals present altered lipid metabolism and increased hepatic periportal lesions associated with an inflammatory response composed mainly by mononuclear cells. We are now focusing to identify the causes of increased liver lesions in LFE animals. (AU)

FAPESP's process: 12/14792-3 - Characterization of global gene expression associated with feed efficiency in Nelore cattle
Grantee:Pâmela Almeida Alexandre
Support type: Scholarships in Brazil - Master
FAPESP's process: 14/00307-1 - A systems genetics approach for improving feed efficiency in Nellore cattle
Grantee:Pâmela Almeida Alexandre
Support type: Scholarships abroad - Research Internship - Master's degree
FAPESP's process: 14/07566-2 - Genomics applied to ruminant production
Grantee:José Bento Sterman Ferraz
Support type: Research Projects - Thematic Grants
FAPESP's process: 14/02493-7 - Mammary tumors of dogs and the cancer stem cell theory: a comparative and translational approach
Grantee:Heidge Fukumasu
Support type: Research Grants - Young Investigators Grants