Novel homozygous likely-pathogenic intronic variant in INS causing permanent neonatal diabetes in siblings
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Rachel Courtney
Abstract
Permanent neonatal diabetes (PNDM) is a rare genetic condition characterized by hyperglycemia, insulinopenia, and failure to thrive beginning in the first 6 months of life. Recessive mutations in INS lead to decreased production of insulin via a variety of mechanisms. We present a case of two brothers, born to consanguineous parents, with a novel homozygous intronic variant in the INS gene. Each patient presented with intrauterine growth restriction (IUGR) and significant hyperglycemia within the first 24 h of life. All the grandparents have a diagnosis of diabetes, one of them requiring insulin treatment and the parents currently deny personal histories of diabetes. Although this mutation has not previously been described, given the segregation of the mutation, absence of heterozygosity (AOH) in the genomic region encompassing the INS locus, documented insulinopenia, and high neonatal insulin requirements, we suspect that this variant is pathogenic. Possible implications for personalized treatment of the underlying molecular etiology for an individual’s diabetes are discussed.
Acknowledgments
We gratefully thank the family for their participation in this study.
Author contributions: All the authors have accepted responsibility for the entire content of this submitted article and approved submission.
Research funding: None declared.
Employment or leadership: None declared.
Honorarium: None declared.
Competing interests: The funding organization(s) played no role in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or in the decision to submit the report for publication.
References
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©2016 Walter de Gruyter GmbH, Berlin/Boston
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Artikel in diesem Heft
- Frontmatter
- Review
- A germline mutation of HRPT2/CDC73 (70 G>T) in an adolescent female with parathyroid carcinoma: first case report and a review of the literature
- Original Articles
- Seroprotection status of hepatitis B and measles vaccines in children with type 1 diabetes mellitus
- Prevalence and awareness of functional and structural foot abnormalities in children and adolescents with type 1 diabetes
- WHO European Childhood Obesity Surveillance Initiative in Serbia: a prevalence of overweight and obesity among 6–9-year-old school children
- Pilot study of newborn screening of inborn error of metabolism using tandem mass spectrometry in Malaysia: outcome and challenges
- In children with autoimmune thyroid diseases the association with Down syndrome can modify the clustering of extra-thyroidal autoimmune disorders
- Identification of monogenic gene mutations in Japanese subjects diagnosed with type 1B diabetes between >5 and 15.1 years of age
- Referral pattern of children with short stature to a pediatric endocrine clinic in Kuwait
- Factors associated with post-menarcheal growth: results of a longitudinal study in Chilean girls from different socioeconomic statuses
- Percentiles for anthropometric measures in Iranian children and adolescents: the CASPIAN-IV study
- Hormone disorder and vitamin deficiency in attention deficit hyperactivity disorder (ADHD) and autism spectrum disorders (ASDs)
- Case Reports
- Hyperinsulinism-hyperammonemia syndrome: a de novo mutation of the GLUD1 gene in twins and a review of the literature
- Novel homozygous likely-pathogenic intronic variant in INS causing permanent neonatal diabetes in siblings
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- Treatment experience and long-term follow-up data in two severe neonatal hyperparathyroidism cases
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