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Genetic determinants of gestational diabetes mellitus in thai pregnant women: role of GCKR, CDKAL1, TCF7L2, NEDD1, and CMIP variants.

Sarocha Suthon·Wachirawit Angkatavanich·Shukri Husein Mohamud·Saranya Innang·Suavaluk Songlilitchuwong·Nipaporn Teerawattanapong·Tassanee Narkdontri·Dittakarn Boriboonhirunsarn·Watip Tangjittipokin
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Abstract

BACKGROUND: Gestational diabetes mellitus (GDM) has a high global prevalence and arises from complex interactions between genetic predisposition and environmental factors. GDM is associated with metabolic disturbances and chronic low-grade inflammation, both of which contribute to its pathogenesis. This study aimed to investigate the association between GDM and 135 single-nucleotide polymorphisms (SNPs) across 20 genes related to metabolic traits. METHODS: In this case-control study, 152 pregnant women with GDM and 684 pregnant women with normal glucose tolerance (NGT) who underwent antenatal examination at Siriraj Hospital, Bangkok, were enrolled. Clinical data and blood samples were collected from all participants. Genomic DNA was isolated and subjected to whole-genome sequencing using the DNBSEQ-T7RS high-throughput sequencing platform. Genotype analyses were performed using R software, and haplotype analyses were conducted using the online SNPStats software. RESULTS: After adjusting for maternal age and pre-pregnancy body mass index, polymorphisms in TCF7L2 (rs34872471, rs7901695, rs4506565, rs7903146, rs12243326, and rs12255372), NEDD1 (rs10431408, rs11830756, rs249579, rs249585, and rs4762339), CMIP (rs2306115 and rs201681534), CDKAL1 (rs4710942), GCKR (rs2293572 and rs2293571), and GCK (rs5883890) were significantly associated with the risk of GDM. Haplotype analysis demonstrated that the TCF7L2 rs12243326-rs12255372 CA haplotype was associated with a decreased risk of GDM (OR = 0.44, 95% CI: 0.23-0.81), while the NEDD1 rs249579-rs249585-rs4762339 GGT haplotype was associated with an increased risk of GDM (OR = 1.40, 95% CI: 1.08-1.82). CONCLUSIONS: These findings suggest that genetic variations in TCF7L2, NEDD1, CMIP, CDKAL1, GCK, and GCKR contribute to GDM susceptibility in the Thai population.

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HumansFemalePregnancyDiabetes, GestationalPolymorphism, Single NucleotideAdultThailandCase-Control StudiesTranscription Factor 7-Like 2 ProteinGenetic Predisposition to DiseaseCyclin-Dependent Kinase 5Adaptor Proteins, Signal TransducingtRNA MethyltransferasesHaplotypesGenesSNPgestational diabetes mellituspolymorphismwomenJournal ArticleResearch Support, Non-U.S. Gov't

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Sarocha Suthon, Wachirawit Angkatavanich, Shukri Husein Mohamud, Saranya Innang, Suavaluk Songlilitchuwong, Nipaporn Teerawattanapong, Tassanee Narkdontri, Dittakarn Boriboonhirunsarn, Watip Tangjittipokin. 2026-07-17. Genetic determinants of gestational diabetes mellitus in thai pregnant women: role of GCKR, CDKAL1, TCF7L2, NEDD1, and CMIP variants.. https://doi.org/10.1080/07853890.2026.2703311

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Adaptor Proteins, Signal Transducing subjectAdult subjectCase-Control Studies subjectDiabetes, Gestational subjectFemale subjectGenetic Predisposition to Disease subjectHaplotypes subjectHumans subjectJournal Article subjectJournal Article; Research Support, Non-U.S. Gov't resourcePolymorphism subjectPolymorphism, Single Nucleotide subjectPregnancy subject

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