rs1805087

A case-control study of 152 NTD patients and 169 controls in Han Chinese population identified three folate metabolism pathway SNPs associated with neural tube defects: rs2236225 in MTHFD1 (allele A, OR=1.500; AA genotype OR=2.862), rs1801133 in MTHFR (allele T, OR=1.552; TT genotype OR=2.344), and rs1801394 in MTRR (allele G, OR=1.533; GG genotype OR=2.355). The study demonstrates genetic variation in folate metabolism significantly affects NTD susceptibility.

A candidate gene association study screening 1,421 SNPs in 407 cancer-related genes identified two novel susceptibility loci for childhood B-precursor acute lymphoblastic leukemia: rs6966 in PPP1R13L/ERCC2 region (OR=3.74, 95% CI 2.31-6.04, p=4.55×10⁻⁹) and rs414580 in MSR1 (OR=3.93, 95% CI 2.31-6.69, p=6.09×10⁻⁸). A third SNP, rs11762213 in MET, showed borderline significance (p=2.97×10⁻²).

Case-control study of 501 young stroke patients and 1,211 controls examining 58 polymorphisms in 17 genes involved in methionine metabolism. Multiple logistic regression identified four independent risk factors for early-onset ischaemic stroke: rs10037045 BHMT (OR 1.38, p=0.033), rs682985 BHMT2 (OR 1.46, p=0.017), rs1051319 CBS (OR 3.75, p<0.0001), and rs202680 FOLH1 (OR 3.00, p<0.0001). Haplotype analyses identified significant associations with BHMT, CBS, FOLH1, MTR, PON2, TCN2 and TYMS haplotypes and stroke risk.

Case-control study of 169 omphalocele cases and 761 controls examining variants in folate, vitamin B12, and homocysteine metabolism genes. Variants in transcobalamin receptor (TCblR) rs2232775 (Q8R) and methylenetetrahydrofolate reductase (MTHFR) rs1801131 (1298A>C) were significantly associated with omphalocele (TCblR OR=3.20, p=0.0017; MTHFR OR=2.04, p=0.028). Additional race-ethnicity-specific associations were found with TCN2, BHMT rs3733890, and FOLH1 variants, suggesting disruption of methylation reactions as a potential risk factor.

This case-control association study examined genetic polymorphisms in 237 Russian women to identify variants associated with early reproductive loss and recurrent miscarriage. The study found that DNMT3B rs2424913 (OR=4.44-4.78), DNMT1 rs2228611 (OR=3.0-3.94), and DNMT1 rs8101626 (OR=2.5-3.1) were significantly associated with increased risk of sporadic and recurrent early pregnancy loss, while SYCP3 rs769825641 heterozygotes showed elevated risk of sporadic miscarriage.

Comprehensive review evaluating SNPs as genetic predictors of choroidal neovascularization (CNV) response to photodynamic therapy with verteporfin (PDT-V). The paper examines pharmacogenetic correlations for thrombo-coagulative pathway variants (MTHFR rs1801133, F5 rs6025, F2 rs1799963, F13A1 rs5985), complement/inflammatory variants (CFH, HTRA1, CRP, ARMS2), and VEGFA variants (rs699947, rs2146323), concluding that specific SNPs show clinical plausibility as markers to optimize PDT-V efficacy and guide therapeutic approaches in neovascular macular degeneration.

This family-based association study examined 14 folate pathway genes using 89 SNPs in 445 NSCLP families (317 non-Hispanic White, 128 Hispanic) to identify genetic variants contributing to nonsyndromic cleft lip and palate. Evidence for association was found with SNPs in NOS3 and TYMS in the non-Hispanic White group (rs2373929/NOS3, rs502396/TYMS, and others), and with MTR, BHMT2, MTHFS, and SLC19A1 in the Hispanic group (rs1422086/BHMT2, rs2115540/MTHFS significant after Bonferroni correction). Multiple gene-gene interactions were detected, with CBS and MTHFD1 showing the most extensive interactions. Significant interactions were also found between several SNPs and maternal smoking and one SNP (rs651646/FOLR2) with offspring sex.

This case-control study examined 21 SNPs in 13 folate and choline metabolism genes for associations with tooth agenesis (hypodontia/oligodontia) in a Polish population of 159 cases and 185 controls. The CHDH gene variant rs6445606 showed the strongest association with a protective effect (OR=0.434, p=0.0004), with individuals carrying the C allele having reduced risk of tooth agenesis. Multifactor dimensionality reduction analysis revealed a significant epistatic interaction between CHDH rs6445606 and PLD2 rs3764897 (p=0.004).

This case-control and family-based study evaluated 64 SNPs in 34 genes for associations with spina bifida in 558 Irish case-families and 994 controls. Spina bifida was significantly associated with LEPR rs1805134 (GRR: 1.5, P = 0.0264) and COMT rs737865 (GRR: 1.4, P = 0.0206), with additional confirmations of previous findings in MTHFR 677C>T and other genes, suggesting roles for leptin signaling and methylation pathways in neural tube defect pathogenesis.

This case-control study examined folate pathway gene variants in 121 DS-AVSD cases and 122 DS controls (no CHD). Tag SNPs in MTHFR, MTR, MTRR, CBS, and SLC19A1 were genotyped. SLC19A1 showed significant gene-level association with atrioventricular septal defect (P=0.01), with multiple tag SNPs nominally associated (OR 1.08-1.72). All significant SLC19A1 SNPs showed strong LD (r²≥0.80) with the nonsynonymous variant rs1051266 (c.80A>G, p.H27R). MTHFR c.1298A was over-transmitted to cases (P=0.05) and under-transmitted to controls (P=0.02), showing association in FBAT analysis (P=0.03 dominant, P=0.01 additive). These results suggest folate pathway disruption contributes to AVSD risk in Down syndrome individuals.

This association study screened 57 SNPs from 11 one-carbon metabolism genes in 564 NSCLC patients to identify genetic variants affecting lung cancer prognosis. Key findings included favorable prognostic associations for MTR rs3768160 A>G (HR=0.78, 95% CI 0.62-0.98), MTRR rs2966952 G>A (HR=0.84, 95% CI 0.71-0.99), and DHFR rs1650697 G>A (HR=0.83, 95% CI 0.70-0.99), with unfavorable prognosis for MTHFD1 rs1950902 G>A (HR=1.18, 95% CI 0.99-1.40). Combined analysis of these four SNPs demonstrated a locus-dosage effect on NSCLC survival (P trend = 6.9×10⁻⁵) and identified combined genotypes as an independent prognostic factor.

This longitudinal study of 5,167 Japanese community-dwelling adults (aged 40-84 years) examined the association between MTHFR C677T (rs1801133) and MTR A2756G (rs1805087) polymorphisms and age-related hearing impairment. The MTHFR 677T allele was significantly associated with reduced hearing impairment risk (OR: 0.7609, 95% CI: 0.6178-0.9372) only in individuals with MTR AA genotype. The favorable effect of the MTHFR 677T allele was independent of folate and homocysteine levels, while elevated homocysteine was independently associated with increased hearing impairment risk.

A case-control study of 1,097 renal cell carcinoma (RCC) cases and 1,555 controls in Central and Eastern Europe examined common genetic variation in 5 folate metabolism genes. Variants in MTHFR (A222V rs1801133) and TYMS (IVS2-405C rs502396) were significantly associated with RCC risk, with the MTHFR variant increasing risk (OR=1.44) particularly in groups with low vegetable intake, while TYMS variant reduced risk (OR=0.73). The associations demonstrated significant gene-nutrient interactions with vegetable consumption.

This family-based association study examined 12 polymorphisms in one-carbon metabolism genes (BHMT, CBS, MTHFD1, MTHFR, MTR, MTRR, SLC19A1, TCN2) and their associations with oral facial clefts in 553 Norwegian families. CBS rs234706 showed a significant maternal protective effect on cleft lip/palate risk (LRT p=0.008), with homozygous carriers of the T allele showing reduced risk (RR=0.50, 95% CI 0.26-0.96). MTHFR rs1801133 demonstrated a protective effect in the low-folate supplementation subset (RR=0.60-0.44), and maternal folic acid supplementation ≥400 μg/day was associated with 39% reduction in cleft lip/palate risk.