MALAT-1, a non protein-coding RNA is upregulated in the cerebellum, hippocampus and brain stem of human alcoholics

Alcohol
Rosemarie KrygerVincent Jaquet

Abstract

Chronic alcohol intake induces neurochemical adaptative changes in the brain characterised by altered gene expression. A role for non-coding RNAs in alcoholism is beginning to emerge. PCR-differential display using total RNA extracted from brain material of human alcoholics and control cases identified a cDNA fragment corresponding to a section of a known non protein-coding RNA (ncRNA), MALAT-1, (also known as NEAT2). Comparison of mRNA levels of MALAT-1 was performed by northern and dot blot experiments using different regions of brain from human alcoholics and rats chronically treated with ethanol vapours and following withdrawal. A massive increase of MALAT-1 transcripts was detected in cerebellum of human alcoholics and increases were also noted in hippocampus and brain stem, while no significant increase of MALAT-1 expression was noted in frontal or motor cortices. In the rat no significant difference of MALAT-1 ortholog mRNA could be detected in cerebellum. In addition, similarly to humans, no significant increase of MALAT-1 expression was detected in cortex of alcohol-treated rats, however, after 24 h alcohol withdrawal, a significant upregulation of MALAT-1 expression was observed in rat cortex. MALAT-1 is upregulated i...Continue Reading

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