“…Two ESR1 SNPs located at position 397 and 351 of intron 1 were examined, rs9340799 and rs2234693 respectively. These SNPs were chosen for because: 1/ they have shown potential causal associations with other estrogen-dependent health outcomes, including Alzheimer's disease (Corbo et al, 2006), cognitive function (Yaffe et al, 2002), cardiovascular disease (Herrington et al, 2002;Shearman et al, 2003), osteoporosis (Ioannidis et al, 2002), breast cancer (Kjaergaard et al, 2007;Slattery et al, 2007) and vasomotor symptoms (Malacara et al, 2004); 2/ we have previously demonstrated significant associations between these ESR1 polymorphisms and depressive symptoms in older women (Ryan et al, 2011a); 3/ there is evidence that these polymorphisms are functional as they regulate ESR1 expression (Alonso et al, 2011;Herrington et al, 2002;Maruyama et al, 2000) and have shown some association serum estradiol levels Sowers et al, 2006).…”