Relative expression of a dominant mutated ABCC8 allele determines the clinical manifestation of congenital hyperinsulinism.

Abstract excerpt

Congenital hyperinsulinism (CHI) is most commonly caused by mutations in the β-cell ATP-sensitive K(+) (K(ATP)) channel genes. Severe CHI was diagnosed in a 1-day-old girl; the mother's cousin and sister had a similar phenotype. ABCC8 gene sequencing (leukocyte DNA) revealed a heterozygous, exon 37, six-base pair in-frame insertion mutation in the affected patient and aunt but also in her unaffected mother and...

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