In frontal cortex we observed: 1) reduced expression of 120 kDa form of APP in subjects with schizophrenia and bipolar disorder; 2) reduced expression of 61 kDa and 33k Da forms of STEP in subjects with schizophrenia; 3) reduced expression of 88 kDa form of APP in subjects with bipolar disorder; and 3) trends for reduced expression of 88 kDa form of APP and homer 1 in subjects with schizophrenia and bipolar disorder, respectively.
We then combined our sample with another Nordic case-control sample (n = 435/11,491) from Iceland, and added results from the Wellcome Trust Case Control Consortium (WTCCC) (n = 1,868/2,938) and the STEP-UCL/ED-DUB-STEP2 study (n = 2,558/3,274) in a meta-analysis which revealed a P-value of 1.2 × 10(-5) for association between PALB2 SNP rs420259 and BD (n = 5,547/20,241).