rs2242480

This case-control association study of 815 Chinese pregnant women identified five SNPs in the GC (vitamin D-binding protein) gene significantly associated with serum 25-hydroxyvitamin D concentration: rs17467825, rs4588, rs2282679, rs2298850, and rs1155563. Mean 25(OH)D level was 15.67±7.98 ng/mL with 75% prevalence of deficiency. An XGBoost model incorporating these SNPs plus environmental factors achieved AUC 0.828 for predicting 25(OH)D deficiency risk. The study suggests maternal vitamin D deficiency may increase macrosomia risk (12 of 16 macrosomic infants had deficient mothers).

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.

This pharmacogenetic study examined SNPs in NR1I2, CYP3A4, and CYP3A5 genes in 311 Chinese breast cancer patients undergoing AC (doxorubicin/cyclophosphamide) chemotherapy. The CYP3A5*3 variant rs776746 showed strong association with grade 4 chemotherapy-induced neutropenia in multivariate analysis (OR=2.56, P=0.023), with a 3.14-fold increased risk in A-allele carriers with normal baseline ANC (P=0.004). The study demonstrates gene-environment interaction in chemotherapy toxicity prediction.

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.

A population-based case-control study of 473 African-American men (131 prostate cancer cases, 342 controls) examined SNP associations in six genes involved in androgen and IGF-1 pathways. Significant associations were found between prostate cancer and CYP17 SNPs rs6163, rs6162, and rs743572, with heterozygotes showing decreased risk (P=0.0014, 0.0018, 0.0028). Suggestive evidence for association was found between IGF-1 SNP rs5742657 and prostate cancer (P=0.058 genotype; P=0.02 allelic test). No significant associations were observed for SNPs in CYP3A4, CYP19A1, SRD5A2, or IGFBP-3 genes.