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Mol Nutr Food Res. 2015 Sep;59(9):1865-78. doi: 10.1002/mnfr.201570094.

Dietary lipids modulate the expression of miR-107, a miRNA that regulates the circadian system.

Author information

1
Nutritional Genomics of Cardiovascular Disease and Obesity, IMDEA-Food Institute, CEI UAM+CSIC, Madrid, Spain.
2
Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT, USA.
3
Integrative Cell Signaling and Neurobiology of Metabolism Program, Section of Comparative Medicine, Yale University School of Medicine, New Haven, CT, USA.
4
Servicio de Bioquímica-Investigación, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRyCIS), Madrid, Spain.
5
Nutrition and Genomics Laboratory, JM-USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA.

Abstract

SCOPE:

The increased prevalence of cardiovascular diseases (CVDs) has been hypothesized to be the result of an increased exposure to a host of atherogenic environmental factors, paramount among them being unhealthy dietary habits. Long-chain n-3 polyunsaturated fatty acids (PUFAs) have been shown to have cardio protective effects, partially due to their ability to regulate gene expression. In this regard, increasing attention has been devoted to the role of miRNAs as regulators of multiple metabolic pathways whose deregulation has been associated with CVD risk. In this work we investigated whether miRNA expression was regulated by docosahexanoic acid, conjugated linoleic acid and cholesterol in Caco-2 cells.

RESULTS:

Among the modulated miRNAs, miR-107 was differentially expressed by all treatments and this modulation was independent of its hosting gene, panthothenate kinase 1, possibly through its own promoter, which contains binding sites for metabolically relevant transcription factors. Among the putative target genes of miR-107, we found some genes with key roles in circadian rhythm. Specifically, we demonstrated that binding of miR-107 to the circadian locomotor output cycles kaput gene results in the deregulation of the circadian rhythm of the cells.

CONCLUSION:

Since chronodisruption has been linked to metabolic disorders such as type 2 diabetes, atherosclerosis, obesity, and CVD, our findings suggest that miR-107 could represent a new approach for pharmacological treatment of these diseases.

KEYWORDS:

Circadian rhythm; DHA; Dietary lipids; miR-107

PMID:
26387852
DOI:
10.1002/mnfr.201570094

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