rs2227956

This comprehensive review examines the genomics of schizophrenia and pharmacogenomics of antipsychotic drugs, synthesizing evidence on over 200 genes associated with psychotic disorders. The authors discuss five categories of genes relevant to antipsychotic response: disease-associated genes, mechanism-of-action genes, drug metabolism genes (particularly CYP2D6, CYP2C19, CYP2C9, CYP3A4), drug transporter genes, and pleiotropic genes. The review details pharmacogenomic profiles of 20+ antipsychotic drugs and demonstrates significant ethnic and interindividual variation in drug metabolism phenotypes, with examples including CYP2D6 extensive metabolizers (55.71% of population), intermediate metabolizers (34.7%), poor metabolizers (2.28%), and ultra-rapid metabolizers (7.31%).

This case-control study investigated epistatic interactions between trace amine receptor 6 (TAAR6) and heat shock protein 70 (HSP-70) gene variants in 187 major depressive disorder (MDD) patients, 171 bipolar disorder (BD) patients, and 288 controls using the multifactor dimensionality reduction (MDR) method. Significant gene-gene interactions were identified between TAAR6 SNPs (rs4305745, rs7452939) and HSP-70 SNPs (rs562047) that distinguished mood disorder patients from controls, with testing balancing accuracy of 0.65 for BD (P < 0.001) and 0.62 for MDD (P < 0.001).

Case-control association study of five HSP70 gene SNPs (rs2227956, rs2075799, rs1043618, rs562047, rs539689) in 294 schizophrenia patients and 287 controls. The rare rs2075799*A allele was significantly associated with schizophrenia (χ² = 8.03, P = 0.0046; OR for G/A genotype = 1.77), and a T-A haplotype of rs2227956-rs2075799 showed significantly elevated risk (OR 3.42, P = 0.005). The five-SNP T-A-C-C-G haplotype also showed strong association (OR 5.95, global P = 0.000003).