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Subcellular Localization and Polymorphism of Bovine FABP4 in Bovine Intramuscular Adipocytes

Subcellular Localization and Polymorphism of Bovine FABP4 in Bovine Intramuscular Adipocytes

Authors :
Shohei Hirota
Shinichi Yonekura
Honami Miyazaki
Yukako Tokutake
Source :
Animal Biotechnology. 27:96-103
Publication Year :
2016
Publisher :
Informa UK Limited, 2016.

Abstract

Fatty acid binding protein 4 (FABP4) I74 V, a gene polymorphism associated with unsaturated fatty acid contents, was discovered in Japanese Black cattle. Individuals with FABP4 I/I genotype contain a significantly high level of palmitoleic acid compared to those with FABP4 V/V genotype. It remains unknown how the FABP4 polymorphism leads to different palmitoleic acid contents. We overexpressed FABP4 of different genotypes in bovine intramuscular preadipocytes and examined whether the intracellular localization of FABP4 and the expression levels of lipid metabolism-related genes were different among cells expressing different genotypes. Nuclear localization was observed for the FABP4 V/V, while the FABP4 I/I almost did not. The cells expressing FABP4 of different genotypes were comparable in terms of the expression levels of genes involved in lipid metabolism. FABP4 I/I was localized in most of the lipid droplets 4 days after differentiation induction, whereas approximately 25% lipid droplet co-localized with FABP4 in cells expressing FABP4 V/V. The lipid droplet size increased when palmitoleic acid was added compared to the size observed when palmitic acid was added. These results suggest that lipid droplet enlargement caused by palmitoleic acid and genotype-dependent differences in the fatty acid transporting capacity underlie variations in palmitoleic acid content among FABP4 polymorphisms.

Details

ISSN :
15322378 and 10495398
Volume :
27
Database :
OpenAIRE
Journal :
Animal Biotechnology
Accession number :
edsair.doi.dedup.....2996e1b5c25f7fd150011fc307ddd805
Full Text :
https://doi.org/10.1080/10495398.2015.1102148