Article
Genetics of neonatal hyperinsulinism
Benjamin Glasera, Paul Thorntonb, Timo Otonkoskic, Claudine Juniend
a Department of
Endocrinology and Metabolism, The Hebrew University, Hadassah Medical
School, Jerusalem, 91120, Israel, b Division of Endocrinology, Department of
Paediatrics, University of Pennsylvania School of Medicine,
Philadelphia, PA 19104, USA, c Transplantation Laboratory, Haartman
Institute, University of Helsinki, Helsinki FIN 00014, Finland, d INSERM
Unité 383, Génétique, Chromosome et Cancer, Hopital des Enfants
Malades, 75743 Paris, France
Correspondence to: Dr B Glaser, Division of Endocrinology and Metabolism, Hadassah University Hospital, PO Box 12000, Jerusalem, Israel email: beng{at}cc.huji.ac.il
Congenital hyperinsulinism (HI) is a clinically and genetically
heterogeneous entity. The clinical heterogeneity is manifested by
severity ranging from extremely severe, life threatening disease to
very mild clinical symptoms, which may even be difficult to identify.
Furthermore, clinical responsiveness to medical and surgical management
is extremely variable. Recent discoveries have begun to clarify the
molecular aetiology of this disease and thus the mechanisms responsible
for this clinical heterogeneity are becoming more clear. Mutations in 4 different genes have been identified in patients with this clinical
syndrome. Most cases are caused by mutations in either of the 2 subunits of the
cell ATP sensitive K+ channel
(KATP), whereas others are caused by mutations in the
cell enzymes glucokinase and glutamate dehydrogenase. However, for as many as 50% of the cases, no genetic aetiology has yet
been determined. The study of the genetics of this disease has provided
important new information about
cell physiology. Although the
clinical ramifications of these findings are still limited, in some
situations genetic studies might greatly aid in patient management.
Keywords: hypoglycaemia; sulphonylurea receptor; ATP sensitive potassium channel; hyperinsulinism
© 2000 by Archives of Disease in Childhood
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