Mineral absorption is an enriched pathway in a brain region of restless legs syndrome patients with reduced MEIS1 expression


Autoři: Faezeh Sarayloo aff001;  Alexandre Dionne-Laporte aff002;  Helene Catoire aff002;  Daniel Rochefort aff002;  Gabrielle Houle aff001;  Jay P. Ross aff001;  Fulya Akçimen aff001;  Rachel De Barros Oliveira aff002;  Gustavo Turecki aff001;  Patrick A. Dion aff002;  Guy A. Rouleau aff002
Působiště autorů: McGill University, Department of Human Genetics, Montréal, QC, Canada aff001;  McGill University, Montreal Neurological Institute, Montréal, QC, Canada aff002;  McGill University, Department of Psychiatry, McGill Group for Suicide Studies, Douglas Institute, Montréal, QC, Canada aff003;  McGill University, Department of Neurology and Neurosurgery, Montréal, QC, Canada aff004
Vyšlo v časopise: PLoS ONE 14(11)
Kategorie: Research Article
doi: 10.1371/journal.pone.0225186

Souhrn

Restless legs syndrome is a common complex disorder with different genetic and environmental risk factors. Here we used human cell lines to conduct an RNA-Seq study and observed how the gene showing the most significant association with RLS, MEIS1, acts as a regulator of the expression of many other genes. Some of the genes affected by its expression level are linked to pathways previously reported to be associated with RLS. We found that in cells where MEIS1 expression was either increased or prevented, mineral absorption is the principal dysregulated pathway. The mineral absorption pathway genes, HMOX1 and VDR are involved in iron metabolism and response to vitamin D, respectively. This shows a strong functional link to the known RLS pathways. We observed the same enrichment of the mineral absorption pathway in postmortem brain tissues of RLS patients showing a reduced expression of MEIS1. The expression of genes encoding metallothioneins (MTs) was observed to be dysregulated across the RNA-Seq datasets generated from both human cells and tissues. MTs are highly relevant to RLS as they bind intracellular metals, protect against oxidative stress and interact with ferritins which manage iron level in the central nervous system. Overall, our study suggests that in a subset of RLS patients, the contribution of MEIS1 appears to be associated to its downstream regulation of genes that are more directly involved in pathways that are relevant to RLS. While MTs have been implicated in the pathogenesis of neurodegenerative diseases such as Parkinson’s diseases, this is a first report to propose that they have a role in RLS.

Klíčová slova:

Gene expression – Gene regulation – Haplotypes – RNA extraction – RNA sequencing – Thalamus – Transcription factors – Transcriptional control


Zdroje

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2019 Číslo 11