HMOX1 and Parkinson disease: We previously reported an association between the variable number tandem repeat of alternating purine-pyrimidine sequence (GT)n and the single nucleotide polymorphism (SNP) rs2071746 in the HMOX1 gene with the risk of developing PD, especially with early onset of the disease and with the classic PD phenotype, whereas rs2071747 and rs9282702 SNPs showed no association.6 With regards of the HMOX2 gene, our group reported an increased risk for PD among rs2270363GG carriers, and lack of association with rs17884623 and rs17880805 SNPs.7