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Published on: April 15, 2015
Association between DPYSL2 gene polymorphisms and alcohol dependence in Caucasian samples
1Department of Biostatistics and Epidemiology, College of Public Health, East Tennessee State University, PO Box 70259, Lamb Hall, Johnson City, TN, 37614-1700, USA.
Genetic variants in the DPYSL2 gene are associated with alcohol dependence (AD). Specific single-nucleotide polymorphisms (SNPs) and haplotypes within DPYSL2 show significant links to AD susceptibility in Caucasian populations.
Area of Science:
- Neurogenetics
- Psychiatric Genetics
- Addiction Research
Background:
- The DPYSL2 gene, located at 8p22-p21, is crucial in neuronal tissues.
- DPYSL2 has been previously linked to psychiatric disorders like Alzheimer's disease and schizophrenia.
Purpose of the Study:
- To investigate the potential role of DPYSL2 gene polymorphisms in alcohol dependence (AD).
- To identify specific single-nucleotide polymorphisms (SNPs) and haplotypes associated with AD risk.
Main Methods:
- Genomic association study of 57 DPYSL2 SNPs in two Caucasian cohorts: COGA (660 AD cases, 400 controls) and SAGE (623 cases, 1,016 controls).
- Meta-analysis of SNP and haplotype associations across both samples.
- Analysis included individual SNP significance and haplotype block analysis.
Main Results:
- SNP rs11995227 showed the strongest association with AD in the COGA sample (p=0.000122).
- SNP rs7832576 also demonstrated significant associations in both COGA (p=0.00163) and SAGE (p=0.0195) samples.
- Meta-analysis confirmed associations for rs11995227 (p=0.000363) and rs7832576 (p=0.000184).
- Specific haplotypes (C-A and T-G) involving these SNPs were significantly associated with AD in one or both cohorts.
Conclusions:
- Genetic variations within the DPYSL2 gene are implicated in the susceptibility to alcohol dependence.
- DPYSL2 represents a potential genetic target for understanding and potentially treating AD.
- Further research into DPYSL2's functional role in neuronal pathways relevant to addiction is warranted.
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