From:  Taste genomics and type 2 diabetes mellitus: a systematic qualitative meta-synthesis

 General characteristics of the studies included in the qualitative meta-synthesis

StudyStudy design (country)PopulationGenotypingInference
Leprêtre et al. [20], 2004Cohort (France)454CD36 gene (entire sequence)No significant association was found between CD36 gene and T2DM (P > 0.1)
Corpeleijn et al. [21], 2006Cohort (Netherlands)151CD36 gene SNP rs1527479 and 478 C/T substitutionCD36 gene SNP rs1527479 TT haplotype was significantly associated with T2DM (P = 0.035), fasting glucose concentration (P < 0.05) and insulin resistance (P < 0.05)
Dotson et al. [22], 2008Case-control (USA)50370 SNPs in TAS1Rs and TAS2Rs gene subtypesTAS2R3 gene SNP rs11763979 (P = 0.03), TAS2R7 gene SNPs rs2588350 (P = 0.0007) and rs619381 (P = 0.009), TAS2R9 gene SNP rs3741845 (P = 0.005), and TAS2R50 gene SNP rs6488334 (P = 0.04) were significantly associated with patients with T2DM
Banerjee et al. [23], 2010Case-control (India)400Two SNPs (rs1527483 and rs1761667) in the CD36 geneCD36 SNP (G>A) rs1761667 GA was significantly associated with patients with T2DM (P < 0.001)
Wang et al. [24], 2012Case-control (China)113CD36 gene SNPs (rs1527483 and rs1049673)CD36 SNP rs1049673 CG & GG haplotypes were significantly associated with impaired glucose tolerance (P = 0.023) and T2DM (P = 0.011) in patients with essential hypertension, respectively
Gautam et al. [25], 2015Case-control (India)100Six CD36 SNPs (rs1984112, rs1761667, rs1527479, rs3211938, rs1527483, and rs3212018)CD36 SNPs rs1761667 (G>A) and rs3211938 (T>G) showed significant association with T2DM (GAATTC1, P < 0.001)
Tabur et al. [26], 2015Case-control (Turkey)30825 TRPM18 gene SNPs rs28441327, rs11070811, rs2241493, rs111649153, rs1618355, rs1328142, rs3760663, rs34364959, rs4929982, rs886277, rs34551253, rs3986599, rs3750425, rs62569677, rs55924090, rs1016062, rs2362294, rs2362295, rs10490018, rs2052029, rs6431648, rs10803666, rs12472151, rs2215173, and rs6740118TRPM5 gene SNP rs4929982 A allele (P = 0.0019) and TRPM8 gene SNP rs12472151 C allele (P < 0.001) polymorphisms might be related to the individual susceptibility to metabolic syndrome (including T2DM)
Park et al. [27], 2016Cohort (South Korea)8,8427 SNPs in TRPV1 gene such as SNPs rs161364, rs8065080, rs150908, rs222745, rs7217945, rs222741, and rs2737141TRPV1 gene SNPs rs161364 C allele (P = 0.0487) and rs8065080 C allele (P = 0.0378) were significantly associated with the prevalence of T2DM in dominant genetic models
Zhang et al. [28], 2018Case-control (China)546Four CD36 SNPs rs1194197, rs2151916, rs3211956, and rs7755Overweight/obesity individuals carrying SNP variant alleles of rs3211956 (GG+GT, P = 0.024) and rs7755 (AA+AG, P = 0.007) were associated with increased risk of T2DM compared to normal weight individuals carrying wild-type homozygous alleles
Fujii et al. [29], 2019Cross-sectional (Japan)495Two CD36 gene SNPs (rs1761667 and rs1527483)CD36 gene SNP rs1761667 AA haplotype was associated with higher intake of total fat (P = 0.01) and monounsaturated fatty acids (P = 0.05) when compared to GG and GA haplotypes. In addition, the frequency of CD36 gene SNP rs1761667 GG haplotype was higher in T2DM
Mrag et al. [30], 2020Cohort (Tunisia)300CA6 gene SNP rs2274327The CA6 gene SNP rs2274327 T allele in its dominant model (TT+CT vs. CC, 67.7% vs. 32.3%) was increasingly associated with T2DM. Similarly, taste impairment in T2DM was significantly associated with CA6 gene SNP rs2274327 T allele in its dominant model (OR = 1.97 [95% CI = 1.21 to 3.23], P = 0.006)
Hatmal et al. [31], 2021Case-control (Jordan)350CD36 gene rs1761667 (G>A) and rs1527483 (C>T) were genotypedNo significant association was observed between CD36 polymorphisms and patients with T2DM or dyslipidemia (P > 0.1)
Touré et al. [32], 2022Cross-sectional (Senegal)1002 tag SNPs in CD36 (rs3211867 and rs1761667)No significant difference was observed between controls and T2DM subjects (P = 0.9)
Franzago et al. [33], 2023Cohort (Italy)23CD36 gene SNPs rs1984112 (A>G) and rs1761667 (G>A), BMAL1 gene SNP rs7950226 (G>A), and CLOCK gene SNPs rs1801260 (A>G), rs4864548 (A>G), and rs3736544 (G>A)CD36 gene SNP rs1761667 (G>A) A allele in its dominant form (AA+GG genotype) was significantly associated with patients with T2DM (P = 0.001)
Lee and Shin [34], 2023Cohort (Korea)4,552TAS2R4 SNP rs2233998TAS2R4 SNP rs2233998 TT haplotype was significantly associated with the incidence of T2DM in women (HR [95% CI] = 1.48 [1.13–1.93], P = 0.0182)
Husami et al. [35], 2025Case-control (India)6802,658 gene variantsTAS2R38 genetic variants were associated with an increased risk of T2DM (P < 0.05)

case: patients with T2DM as defined in the respective studies; control: normal healthy individuals as defined in the respective studies; CD36: cluster determinant 36; T2DM: type 2 diabetes mellitus; SNP: single nucleotide polymorphism; TAS1R: type 1 taste receptor gene family R; TRPM1: transient receptor potential cation channel subfamily M gene member 1; TRPV1: transient receptor potential vanilloid-1; CA6: carbonic anhydrase VI gene; OR: odds ratio; CI: confidence intervals; BMAL1: brain and muscle aryl hydrocarbon receptor nuclear translocator-like protein-1; CLOCK: circadian locomotor output cycles kaput; HR: hazard ratio