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The KLF14 Variant is Associated with Type 2 Diabetes and HbA1C Level

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Abstract

The purpose of this study was to scan variants in coding region of Krȕppel like factor14 (KLF14) locus and assess association related to type 2 diabetes (T2D) in Iranian population. We sequenced the coding region of KLF14 to scan variants in case–sibling study (92 individuals with T2D and 92 healthy older siblings). To confirm, we analyzed rs76603546 association with T2D in a larger unrelated case–control study by PCR–RFLP (475 cases and 512 controls). We analyzed the association of rs76603546 with HbA1C, BMI, fat mass, waist circumference, fasting glucose, cholesterol and HOMA-IR (Homeostatic Model Assessment for Insulin Resistance) using one-way ANOVA analysis. Also, association of genotypes with T2D adjusted for confounding variables was analyzed using logistic regression. HaploReg v 4.1 was used to predict rs76603546 possible function. Sequencing results analysis revealed the association of C allele of rs76603546, synonymous variant C>T, [OR 2.10 (1.38–3.20), P value < 0.001] and CC genotype of rs76603546 [OR 4.3 (1.79–10.23), P value = 0.001] with susceptibility to T2D. PCR-Restriction Fragment Length Polymorphism (RFLP) results analysis confirmed the association of rs76603546 with T2D [C allele, OR 1.91 (1.59–2.29), P value = 0.002, CC genotype, OR 3.27 (2.26–4.73), P value = 0.002 and TC genotype, OR 1.74 (1.31–2.31), P value = 0.001]. The CC genotype of rs76603546 is associated with HbA1C level (P value < 0.001) and BMI (P value = 0.02). After adjustment with confounding variables, we observed association of CC genotype with T2D [OR 2.542 (1.25–3.77), P value = 0.03]. Among over 220 SNPs, rs76603546 was associated with T2D, HbA1C and BMI in our study.

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Acknowledgements

The authors wish to thank Dr. M. Rahmanian and Dr. MH. Sheikhha for technical assistance, Yazd Diabetes Research Center for providing individuals with T2D information, and Mr. Tabatabai for sample collection.

Funding

This work was supported by the Shahid Sadoughi University of Medical Sciences Research Council [Grant Numbers 268471] and the ROJETechnologies Foundation [Grant Number R017-3251/2015].

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Correspondence to Ehsan Farashahi Yazd.

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This study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the Ethics Committee of Shahid Sadoughi University of Medical Sciences (2016/268471).

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Written informed consent was obtained from all participants included in the study.

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10528_2020_10015_MOESM1_ESM.pdf

PCR-RFLP genotyping of rs76603546 in the KLF14 gene with restriction enzyme MspI. Three SNP genotypes, C/C, C/T and T/T, were detected. M: 100 bp DNA ladder. Identification of three genotypes at +336 position (rs76603546) using Automated Sanger Sequencing Method. CC genotype (a), TC genotype (b) and TT genotype (c) (PDF 124 kb)

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Shahvazian, E., Mahmoudi, M.B., Farashahi Yazd, E. et al. The KLF14 Variant is Associated with Type 2 Diabetes and HbA1C Level. Biochem Genet 59, 574–588 (2021). https://doi.org/10.1007/s10528-020-10015-w

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  • DOI: https://doi.org/10.1007/s10528-020-10015-w

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