Clinical and molecular data from 61 Brazilian cases of Congenital Hyperinsulinemic Hypoglycemia

Clinical and molecular data from 61 Brazilian cases of Congenital Hyperinsulinemic Hypoglycemia

Author Liberatore, Raphael Del Roio Google Scholar
Ramos, Priscila Manzini Google Scholar
Guerra, Gil Google Scholar
Della Manna, Thais Google Scholar
Silva, Ivani Novato Autor UNIFESP Google Scholar
Martinelli Junior, Carlos Eduardo Google Scholar
Institution Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Universidade Federal de Minas Gerais (UFMG)
Abstract Objective: To study the clinical and molecular characteristics of a sample of Brazilian patients with Congenital Hyperinsulinemic Hypoglycemia (CHH).Methods: Electronic message was sent to members from Endocrinology Department-Brazilian Society of Pediatrics requesting clinical data for all cases of CHH. A whole blood sample from living patients was requested for DNA extraction followed by a search for mutations of the genes ABCC8, KCNJ11, GCK, GLUD1, HADH, SLC16A1 and HNF4A.Results: of the 61 patients evaluated, 36 (59%) were boys, and only 16 (26%) were born by normal delivery. Gestational age ranged from 32 to 41 weeks (mean = 37 weeks and 6 days). Birth weight ranged from 1590 to 5250 g (mean = 3430 g). Macrossomia occurred in 14 cases (28%). Age at diagnosis ranged from 1 to 1080 days (mean = 75 days). DNA for molecular analysis was obtained from 53 of the 61 patients. Molecular changes in the ABCC8 gene were detected in 15 (28%) of these 53 cases, and mutations in the KCNJ11 gene were detected in 6 (11%). Mutations in the GLUD1 gene were detected in 9 cases (17%) of the total series. Mutations of the GCK gene in heterozygosis were detected in 3 cases. No mutations were detected in the sequencing of genes HADH, SLC16A1 and HNF4A.Conclusion: the present study conducted in Brazil permitted the collaborative compilation of an important number of CHH cases and showed that the present clinical and molecular data are similar to those of published global series.
Keywords Hypoglycemia
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Grant number FAPESP: 2011/09355-0
Date 2015-02-18
Published in Diabetology & Metabolic Syndrome. London: Biomed Central Ltd, v. 7, 6 p., 2015.
ISSN 1758-5996 (Sherpa/Romeo, impact factor)
Publisher Biomed Central Ltd
Extent 6
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000352834900001

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