Journal Article

Comprehensive Maturity Onset Diabetes of the Young (MODY) Gene Screening in Pregnant Women with Diabetes in India

Doddabelavangala Mruthyunjaya, Mahesh, V. Paul, Thomas, Jose, Ruby, Regi, Annie, Hesarghatta Shyamasunder, Asha, Chapla, Aaron, Christina, Flory, Lionel, Jessie, Mathew, Jiji, Varshney, Manika, Paul, Johan, Kuruvilla, Kurien Anil, Jeyaseelan, L., Varghese, Ron Thomas, Thomas, Nihal, Varghese, Deny, Inbakumari, Mercy

2017

Overview

Pregnant women with diabetes may have underlying beta cell dysfunction due to mutations/rare variants in genes associated with Maturity Onset Diabetes of the Young (MODY). MODY gene screening would reveal those women genetically predisposed and previously unrecognized with a monogenic form of diabetes for further clinical management, family screening and genetic counselling. However, there are minimal data available on MODY gene variants in pregnant women with diabetes from India. In this study, utilizing the Next generation sequencing (NGS) based protocol fifty subjects were screened for variants in a panel of thirteen MODY genes. Of these subjects 18% (9/50) were positive for definite or likely pathogenic or uncertain MODY variants. The majority of these variants was identified in subjects with autosomal dominant family history, of whom five were in women with pre-GDM and four with overt-GDM. The identified variants included one patient with HNF1A Ser3Cys, two PDX1 Glu224Lys, His94Gln, two NEUROD1 Glu59Gln, Phe318Ser, one INS Gly44Arg, one GCK, one ABCC8 Arg620Cys and one BLK Val418Met variants. In addition, three of the seven offspring screened were positive for the identified variant. These identified variants were further confirmed by Sanger sequencing. In conclusion, these findings in pregnant women with diabetes, imply that a proportion of GDM patients with autosomal dominant family history may have MODY. Further NGS based comprehensive studies with larger samples are required to confirm these finding.

• Publisher: Public Library of Science,Public Library of Science (PLoS)
• Subject: Adult / Beta cells / Beta2 protein / Biology and Life Sciences / Biomarkers - metabolism / Body mass index / Cross-Sectional Studies / Diabetes / Diabetes mellitus / Diabetes Mellitus, Type 2 - epidemiology / Diabetes Mellitus, Type 2 - genetics / Diabetes Mellitus, Type 2 - metabolism / Diagnosis / Endocrinology / Female / Genes / Genetic aspects / Genetic counseling / Genetic screening / Genetic testing / Genetic Testing - methods / Genetics / Gestational diabetes / Gynecology / Health aspects / High-Throughput Nucleotide Sequencing - methods / Humans / India - epidemiology / Male / Medical screening / Medicine and Health Sciences / Metabolism / MODY gene / Mutation / Mutation - genetics / Obstetrics / Offspring / Pedigree / Phenotype / Pregnancy / Pregnant women / Research and Analysis Methods / Risk factors / Screening / Type 2 diabetes / Womens health