General characteristics of the studies included in the qualitative meta-synthesis
Study | Study design (country) | Population | Genotyping | Inference |
---|---|---|---|---|
Leprêtre et al. [20], 2004 | Cohort (France) | 454 | CD36 gene (entire sequence) | No significant association was found between CD36 gene and T2DM (P > 0.1) |
Corpeleijn et al. [21], 2006 | Cohort (Netherlands) | 151 | CD36 gene SNP rs1527479 and 478 C/T substitution | CD36 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], 2008 | Case-control (USA) | 503 | 70 SNPs in TAS1Rs and TAS2Rs gene subtypes | TAS2R3 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], 2010 | Case-control (India) | 400 | Two SNPs (rs1527483 and rs1761667) in the CD36 gene | CD36 SNP (G>A) rs1761667 GA was significantly associated with patients with T2DM (P < 0.001) |
Wang et al. [24], 2012 | Case-control (China) | 113 | CD36 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], 2015 | Case-control (India) | 100 | Six 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], 2015 | Case-control (Turkey) | 308 | 25 TRPM1–8 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 rs6740118 | TRPM5 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], 2016 | Cohort (South Korea) | 8,842 | 7 SNPs in TRPV1 gene such as SNPs rs161364, rs8065080, rs150908, rs222745, rs7217945, rs222741, and rs2737141 | TRPV1 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], 2018 | Case-control (China) | 546 | Four CD36 SNPs rs1194197, rs2151916, rs3211956, and rs7755 | Overweight/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], 2019 | Cross-sectional (Japan) | 495 | Two 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], 2020 | Cohort (Tunisia) | 300 | CA6 gene SNP rs2274327 | The 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], 2021 | Case-control (Jordan) | 350 | CD36 gene rs1761667 (G>A) and rs1527483 (C>T) were genotyped | No significant association was observed between CD36 polymorphisms and patients with T2DM or dyslipidemia (P > 0.1) |
Touré et al. [32], 2022 | Cross-sectional (Senegal) | 100 | 2 tag SNPs in CD36 (rs3211867 and rs1761667) | No significant difference was observed between controls and T2DM subjects (P = 0.9) |
Franzago et al. [33], 2023 | Cohort (Italy) | 23 | CD36 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], 2023 | Cohort (Korea) | 4,552 | TAS2R4 SNP rs2233998 | TAS2R4 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], 2025 | Case-control (India) | 680 | 2,658 gene variants | TAS2R38 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