Title
Immediate-early alcohol-responsive miRNA expression in Drosophila
Date Issued
01 October 2016
Access level
open access
Resource Type
journal article
Author(s)
Zomeno M.
Pietrzykowski A.
Atkinson N.
University of Puerto Rico
Publisher(s)
Taylor and Francis Ltd
Abstract
At the core of the changes characteristic of alcoholism are alterations in gene expression in the brain of the addicted individual. These changes are believed to underlie some of the neuroadaptations that promote compulsive drinking. Unfortunately, the mechanisms by which alcohol consumption produces changes in gene expression remain poorly understood. MicroRNAs (miRNAs) have emerged as important regulators of gene expression because they can coordinately modulate the translation efficiency of large sets of specific mRNAs. Here, we investigate the early miRNA responses elicited by an acute sedating dose of alcohol in the Drosophila model organism. In our analysis, we combine the power of next-generation sequencing with Drosophila genetics to identify alcohol-sensitive miRNAs and to functionally test them for a role in modulating alcohol sensitivity. We identified 14 known Drosophila miRNAs, and 13 putative novel miRNAs that respond to an acute sedative exposure to alcohol. Using the GeneSwitch Gal4/UAS system, a subset of these ethanol-responsive miRNAs was functionally tested to determine their individual contribution in modulating ethanol sensitivity. We identified two microRNAs that when overexpressed significantly increased ethanol sensitivity: miR-6 and miR-310. MicroRNA target prediction analysis revealed that the different alcohol-responsive miRNAs target-overlapping sets of mRNAs. Alcoholism is the product of accumulated cellular changes produced by chronic ethanol consumption. Although all of the changes described herein are extremely rapid responses evoked by a single ethanol exposure, understanding the gene expression changes that occur in the first few minutes after ethanol exposure will help us to categorize ethanol responses into those that are near instantaneous and those that are emergent responses produced only by repeated ethanol exposure.
Start page
195
End page
204
Volume
30
Issue
April 3
Language
English
OCDE Knowledge area
Alimentos y bebidas Abuso de sustancias
Scopus EID
2-s2.0-84995446652
PubMed ID
Source
Journal of Neurogenetics
ISSN of the container
01677063
Sponsor(s)
National Institute on Alcohol Abuse and Alcoholism - R21AA023372
Sources of information: Directorio de Producción Científica Scopus