References of "Bonin, Michael"
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See detailEIF4G1 is neither a strong nor a common risk factor for Parkinson's disease: evidence from large European cohorts
Huttenlocher, Johanna; Krüger, Rejko UL; Capetian, Philipp et al

in Journal of medical genetics (2014), 0

BACKGROUND: Missense mutations in the eukaryotic translation initiation factor 4-gamma 1 (EIF4G1) gene have previously been implicated in familial Parkinson's disease (PD). A large PD family with ... [more ▼]

BACKGROUND: Missense mutations in the eukaryotic translation initiation factor 4-gamma 1 (EIF4G1) gene have previously been implicated in familial Parkinson's disease (PD). A large PD family with autosomal-dominant segregation showed a heterozygous missense mutation and additional patients were found to have unique sequence variants that have not been observed in controls. Subsequent studies have reported contradictory findings. METHODS: We assessed the relevance of EIF4G1 mutations in a European cohort of 2146 PD patients. Of these, 2051 sporadic PD patients were screened for the reported p.Ala502Val and p.Arg1205His mutations. In addition, the complete coding region of EIF4G1 was directly sequenced in 95 familial PD patients with autosomal-dominant inheritance. Moreover, we imputed the p.Arg1205His substitution and tested for association with PD in the Icelandic population (93 698 samples). RESULTS: We did not observe the presence of the p.Ala502Val substitution in our cohort; however, the p.Arg1205His mutation was identified in one sporadic PD patient. The same mutation was also found in 76 Icelandic subjects older than 65 years using haplotype imputing. Only five of these subjects reported PD symptoms (OR 1.3, p=0.50). Thus, if causal, the p.Arg1205His EIF4G1 mutation has a low penetrance or a late onset manifestation. A novel variant p.Arg566Cys found in a patient with familial PD did not cosegregate with PD in all three affected siblings. All further recently published EIF4G1 mutations found in our cohort are likely to be benign polymorphisms. CONCLUSIONS: This is the largest genetic study of EIF4G1 mutations in PD. Our data do not support the EIF4G1 gene as a high-risk PD locus, neither for the familial nor the sporadic condition. Furthermore, the p.Arg1205His mutation is not significantly associated with increased risk of PD in the Icelandic population. Therefore, caution should be exercised when interpreting EIF4G1 genotyping results in isolated patients and PD families. In summary, diagnostic testing of EIF4G1 should not be recommended in clinical settings. [less ▲]

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See detailGenome-wide association study reveals genetic risk underlying Parkinson's disease.
Simon-Sanchez, Javier; Schulte, Claudia; Bras, Jose M. et al

in Nature genetics (2009), 41(12), 1308-12

We performed a genome-wide association study (GWAS) in 1,713 individuals of European ancestry with Parkinson's disease (PD) and 3,978 controls. After replication in 3,361 cases and 4,573 controls, we ... [more ▼]

We performed a genome-wide association study (GWAS) in 1,713 individuals of European ancestry with Parkinson's disease (PD) and 3,978 controls. After replication in 3,361 cases and 4,573 controls, we observed two strong association signals, one in the gene encoding alpha-synuclein (SNCA; rs2736990, OR = 1.23, P = 2.24 x 10(-16)) and another at the MAPT locus (rs393152, OR = 0.77, P = 1.95 x 10(-16)). We exchanged data with colleagues performing a GWAS in Japanese PD cases. Association to PD at SNCA was replicated in the Japanese GWAS, confirming this as a major risk locus across populations. We replicated the effect of a new locus detected in the Japanese cohort (PARK16, rs823128, OR = 0.66, P = 7.29 x 10(-8)) and provide supporting evidence that common variation around LRRK2 modulates risk for PD (rs1491923, OR = 1.14, P = 1.55 x 10(-5)). These data demonstrate an unequivocal role for common genetic variants in the etiology of typical PD and suggest population-specific genetic heterogeneity in this disease. [less ▲]

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