rs10913469

A literature review of 70 studies examining single nucleotide polymorphisms (SNPs) associated with obesity in Mexican populations published 2011-2021. The authors identified SNPs with differential behavior in Mexican compared to Caucasian populations, including rs17782313 (MC4R), rs6548238 (TMEM18), rs6265 (BDNF), rs7498665 (SH2B1), and notably rs6232 (PCSK1) associated with early-onset obesity in Mexican youth. The review emphasizes ethnicity-dependent genetic effects on BMI heritability (40-70%) and highlights genes involved in cholesterol metabolism and adipokine signaling pathways.

A hospital-based case-control study in rural and urban India (1,204 cases; 1,212 controls) examined genetic and lifestyle risk factors for breast cancer. Four SNPs in FGFR2 (rs1219648, rs2420946, rs2981575, rs2981582) showed positive associations with breast cancer (ORs 1.32-1.47). Additional SNPs in obesity and metabolic genes (rs374748 in FBN2, rs2922763 in HNF4G, rs2116830 in KCNMA1, rs11121832 in MTHFR, rs16886165 in MAP3K1, rs11594610 in TCF7L2, rs2274459 in MLN) were associated with increased breast cancer risk. Waist-to-hip ratio ≥0.95 showed strong association (OR 3.78; 95% CI 2.92-4.89), and women living first 20 years in rural areas showed protective effect (OR 0.77).

This study examined 8 adult obesity-susceptibility loci in 7,225 children aged 2-18 years using quantile regression to assess whether genetic effects on BMI are uniform across the BMI distribution. The authors found that obesity risk alleles (FTO rs3751812, MC4R rs12970134, TMEM18 rs2867125, BDNF rs6265, SEC16B rs10913469, GNPDA2 rs13130484, NRXN3 rs10146997, and TNNI3K rs1514175) were more strongly associated with BMI increases at the upper tail of the distribution (85th-95th percentiles, β=0.06-0.11, p<10^-6) compared to the lower tail, suggesting that standard linear regression approaches may underestimate genetic effects on childhood obesity.

Genome-wide association study examining common variants near BDNF (rs6265, rs925946) and SH2B1 (rs7498665) in relation to snacking behavior across three European cohorts (French obese children, Swiss obese, D.E.S.I.R.). The study reports nominal evidence of association, with rs925946 in BDNF showing OR=1.21 (p=5.03×10⁻³) in the D.E.S.I.R. cohort and rs7498665 in SH2B1 showing OR=1.17 (p=9.57×10⁻³) in the Swiss cohort.

Replication study of 14 obesity-associated SNPs from 13 loci in 18,264 Japanese participants, confirming associations at 11 loci including TMEM18 (rs4854344, p=7.1×10⁻⁷ for BMI), FTO, MC4R, BDNF, and others. Six obesity variants also associated with type 2 diabetes after BMI adjustment (OR 1.05-1.17), with FTO showing strong meta-analyzed association in East Asians (OR 1.13, p=7.8×10⁻¹⁰).