Genetic and clinical features of neonatal and early onset diabetes mellitus in a tertiary center cohort in Brazil

Autor: Aline Dantas Costa‐Riquetto, Lucas Santos de Santana, Pedro Campos Franco, Augusto Cezar Santomauro Jr, Artur Eduardo Martio, Hugo Roberto Kurtz Lisboa, Suely Keiko Kohara, Milena G. Teles
Rok vydání: 2022
Předmět:
Zdroj: Clinical Genetics. 103:434-447
ISSN: 1399-0004
0009-9163
DOI: 10.1111/cge.14279
Popis: Neonatal diabetes mellitus (NDM) is defined as the occurrence of severe hyperglycemia in infants under 6 months old and may be permanent (PNDM) or transient (TNDM). When diabetes is diagnosed at 6-12 months of age (early onset diabetes [EOD]), the etiology may be monogenic; however, most cases consist of type 1 diabetes mellitus (T1DM). Molecular diagnosis was determined in a cohort of 35 unrelated Brazilian patients with NDM or EOD based on targeted next-generation sequencing panel and/or chromosome 6q24 abnormalities. The impact of genetic testing on treatment and follow-up was evaluated. Overall, 24 patients had NDM: with 18 (75.0%) having PNDM, 5 TNDM (20.8%) and 1 case in which this information was unknown. Eleven patients had EOD. Genetic testing was positive in 20/24 patients with NDM (83.3%) and in 18.2% of cases of EOD. The commonest causes were ATP-sensitive potassium (KATP) channel genes, and GCK and IPEX mutations (37.1%, 11.4% and 5.7%, respectively). Patients with PNDM due to KCNJ11 and ABCC8 mutations transitioned successfully to sulfonylureas in almost 60% of cases, reinforcing the benefit of performing genetic testing in NDM as early as possible. This report refers to the largest series of cases of NDM (TNDM and PNDM) and EOD in Brazil in which patients were submitted to molecular investigation and in which the clinical impact of genetic diagnosis was also evaluated.
Databáze: OpenAIRE
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