Recently, a genome-wide association study of a Caucasian population identified variantrs3794087 in intron 4 of the SLC1A2 gene, which may increase the risk of essential tremor (ET).
Our results showed a lack of association between rs6280 and rs3794087 with the risk for ET, though a marginal increased risk for ET was observed among the rs1052553A allele carriers, which was not confirmed with a family-based association study.
SLC1A2 rs3794087 are associated with susceptibility to Parkinson's disease, but not essential tremor, amyotrophic lateral sclerosis or multiple system atrophy in a Chinese population.
Replication of two lead single nucleotide polymorphisms of previous small genome-wide association studies (rs3794087 in SLC1A2, rs9652490 in LINGO1) did not confirm the association with essential tremor.
(4) Subsequent GWAS further identified an intronic variant (rs3794087) of the main glial glutamate transporter (SLC1A2) gene to be associated with ET with an odds ratio (OR) of approximately 1.4.
Our study suggests that SLC1A2 rs3794087 is not associated with the risk for developing familial ET in the Spanish population, thus subtracting relevance to SLC1A2 rs3794087 as a risk biomarker for ET.