In:
Alcoholism: Clinical and Experimental Research, Wiley, Vol. 41, No. 5 ( 2017-05), p. 911-928
Abstract:
Alcohol dependence ( AD ) shows evidence for genetic liability, but genes influencing risk remain largely unidentified. Methods We conducted a genomewide association study in 706 related AD cases and 1,748 unscreened population controls from Ireland. We sought replication in 15,496 samples of European descent. We used model organisms (MOs) to assess the role of orthologous genes in ethanol (EtOH)‐response behaviors. We tested 1 primate‐specific gene for expression differences in case/control postmortem brain tissue. Results We detected significant association in COL 6A3 and suggestive association in 2 previously implicated loci, KLF 12 and RYR 3 . None of these signals are significant in replication. A suggestive signal in the long noncoding RNA LOC 339975 is significant in case:control meta‐analysis, but not in a population sample. Knockdown of a COL 6A3 ortholog in Caenorhabditis elegans reduced EtOH sensitivity. Col6a3 expression correlated with handling‐induced convulsions in mice. Loss of function of the KLF 12 ortholog in C. elegans impaired development of acute functional tolerance (AFT). Klf12 expression correlated with locomotor activation following EtOH injection in mice. Loss of function of the RYR 3 ortholog reduced EtOH sensitivity in C. elegans and rapid tolerance in Drosophila . The ryanodine receptor antagonist dantrolene reduced motivation to self‐administer EtOH in rats. Expression of LOC 339975 does not differ between cases and controls but is reduced in carriers of the associated rs11726136 allele in nucleus accumbens (NAc). Conclusions We detect association between AD and COL 6A3 , KLF 12 , RYR 3, and LOC 339975 . Despite nonreplication of COL 6A3 , KLF 12, and RYR 3 signals, orthologs of these genes influence behavioral response to EtOH in MOs, suggesting potential involvement in human EtOH response and AD liability. The associated LOC 339975 allele may influence gene expression in human NAc. Although the functions of long noncoding RNA s are poorly understood, there is mounting evidence implicating these genes in multiple brain functions and disorders.
Type of Medium:
Online Resource
ISSN:
0145-6008
,
1530-0277
DOI:
10.1111/acer.2017.41.issue-5
Language:
English
Publisher:
Wiley
Publication Date:
2017
detail.hit.zdb_id:
2046886-6
detail.hit.zdb_id:
3167872-5
SSG:
15,3
