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Original Article
Brief Report
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Volume 338:226-230 January 22, 1998 Number 4
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Familial Hyperinsulinism Caused by an Activating Glucokinase Mutation
Benjamin Glaser, M.D., Prebakaran Kesavan, Ph.D., Mozhgan Heyman, Elizabeth Davis, M.B., B.S., Antonio Cuesta, M.D., Ph.D., Andreas Buchs, M.D., Charles A. Stanley, M.D., Paul S. Thornton, M.B., B.Ch., M. Alan Permutt, M.D., Franz M. Matschinsky, M.D., and Kevan C. Herold, M.D.

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Spontaneous hyperinsulinemic hypoglycemia in adults is most frequently caused by sporadic, solitary pancreatic beta-cell tumors, whereas hyperinsulinemic hypoglycemia in childhood is commonly caused by generalized beta-cell dysfunction.1 Mutations in the beta-cell sulfonylurea-receptor (SUR1) gene or inward-rectifying potassium-channel (Kir6.2) gene were found in some patients.2,3,4,5,6,7 A distinct syndrome of hyperinsulinism with hyperammonemia was recently described,8,9 apparently caused by mutations in the glutamate dehydrogenase gene.10 However, many sporadic and familial cases of hyperinsulinism remain unexplained. Some may be due to somatic mutations in other genes, as suggested by reports of autosomal dominant familial hyperinsulinism that was not genetically . . . [Full Text of this Article]

Case Report

Methods

Metabolic Studies

Clinical Biochemical Measurements

Identification of Mutations

Allele-Specific Oligonucleotide Hybridization

Site-Directed Mutagenesis of Glucokinase Complementary DNA

Kinetic Analysis of Recombinant Wild-Type and Mutant Glucokinase

Results

Clinical Studies

Identification and Confirmation of Glucokinase Mutation

Kinetic Analysis of Recombinant Glucokinase

Model Studies

Discussion


Source Information

From the Department of Endocrinology and Metabolism, Hebrew University Hadassah Medical School, Jerusalem, Israel (B.G., M.H., A.B.); the Department of Biochemistry and Biophysics and the Diabetes Research Center (P.K., E.D., A.C., F.M.M.) and the Department of Pediatrics (C.A.S.), University of Pennsylvania School of Medicine, Philadelphia; the National Metabolic Unit, Children's Hospital, Dublin, Ireland (P.S.T.); the Division of Endocrinology, Diabetes and Metabolism, Washington University School of Medicine, St. Louis (M.A.P.); and the Department of Internal Medicine, University of Illinois at Chicago, Chicago (K.C.H.).

Address reprint requests to Dr. Glaser at the Department of Endocrinology and Metabolism, Hadassah University Hospital, Jerusalem, Israel, or to Dr. Herold at the University of Illinois at Chicago, 1819 W. Polk St., M/C640, Chicago, IL 60612.

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