rs4148323

This is a Turkish-language personalized nutrigenetics and epigenetics coaching report for individual Mehmet Efe Yildirim (Report No. 1332, dated 2023-11-21). The report analyzes the individual's genetic polymorphisms related to nutritional metabolism, food sensitivities, detoxification pathways, and other health-related traits, providing personalized dietary and lifestyle recommendations based on cited scientific literature. This is a direct-to-consumer genetic test report, not a peer-reviewed research study.

Case-control study of 1,000 Han Chinese individuals (450 epilepsy cases, 550 controls) examining associations between STX1B polymorphisms and epilepsy treatment response. The rs140820592 variant showed significant association with reduced epilepsy risk (OR=0.542, p=0.004) and drug-resistant epilepsy risk (OR=0.260, p=0.004), with eQTL analysis confirming rs140820592 regulates STX1B expression in brain tissues.

GWAS study of 3,294 European ancestry individuals from the eMERGE Network examining serum bilirubin and other liver function tests. Strong association signal at UGT1A1 locus (rs887829, beta=0.15, p=1.30×10^-118) confirmed in both adult and pediatric populations. Additional associations identified in SLCO1B1, SLCO1B3, TDRP, ZMYND8, and ABO locus. Phenome-wide analysis revealed protective effect of TA7 repeat against cerebrovascular disease (OR=0.75, p=0.0008).

A study of 19 Crigler-Najjar syndrome patients from the Netherlands and Belgium identified 14 different UGT1A1 mutations (4 novel: c.571C>T/p.S191F, c.1160C>A/p.P387H, c.1205A>C/p.K402T, c.1491delG/p.A498X), with two founder mutations present in multiple unrelated patients. The UGT1A1*28 promoter polymorphism (rs5719145insTA) was linked to three structural mutations. Functional analysis of 10 missense mutants showed varying residual enzymatic activity (0-94% of wild-type) toward bilirubin and other substrates, providing insights into enzyme structure and genotype-phenotype correlation for clinical diagnosis.

This systematic review of 98 studies examined biological predictors of clozapine response in treatment-resistant schizophrenia patients. Of 379 different gene variants investigated across 70 genetic studies, only three variants (DRD3 Ser9Gly rs6280, HTR2A His452Tyr, and GNB3 C825T) achieved independent replication. Non-genetic predictors included higher prefrontal cortical volumes and lower HVA:5-HIAA ratio in cerebrospinal fluid.

A systematic review of 98 studies investigating biological predictors of clozapine response in treatment-resistant schizophrenia. Of 70 genetic studies examining 379 variants, only three genetic variants have independently replicated findings: DRD3 Ser9Gly (rs6280), HTR2A His452Tyr, and GNB3 C825T (rs5442/rs5443). Non-genetic predictors include higher prefrontal cortical structural integrity and activity, and lower HVA:5-HIAA ratio in cerebrospinal fluid.

This association study investigated polymorphisms in four bilirubin metabolism genes (UGT1A1, HMOX1, BLVRA, SLCO1B1) with serum total bilirubin (TBIL) levels in three Asian populations (502 Kazak, 769 Uyghur, 789 Han). The UGT1A1 (TA)n repeat polymorphism and rs4148323:G>A were strongly associated with TBIL levels across all three populations (P<0.005), with the (TA)7 allele and A allele associated with higher TBIL levels. The (GT)n repeat polymorphism in HMOX1 showed association only in the Uyghur population. The (TA)n repeat and rs4148323 variants together explained 3.9-9.8% of TBIL variation by population.