UNSPECIFIED (2004) Activating mutations in the KCNJ11 gene encoding the ATP-sensitive K+ channel subunit Kir 6.2 are rare in clinically defined type 1 diabetes diagnosed before 2 years. DIABETES, 53 (11). pp. 2998-3001. ISSN 0012-1797

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Abstract

We have recently shown that permanent neonatal diabetes can be caused by activating mutations in KCNJ11 that encode the Kir6.2 subunit of the beta-cell ATP-sensitive K+ channel. Some of these patients were diagnosed after 3 months of age and presented with ketoacidosis and marked hyperglycemia, which could have been diagnosed as type 1 diabetes. We hypothesized that KCNJ11 mutations could present clinically as type 1 diabetes. We screened the KCNJ11 gene for mutations in 77 U.K. type 1 diabetic subjects diagnosed under the age of 2 years. One patient was found to be heterozygous for the missense mutation R201C. She had low birth weight, was diagnosed at 5 weeks, and did not have a high risk predisposing HLA genotype. A novel variant, R176C, was identified in one diabetic subject but did not cosegregate with diabetes within the family. In conclusion, we have shown that heterozygous activating mutations in the KCNJ11 gene are a rare cause of clinically defined type 1 diabetes diagnosed before 2 years. Although activating KCNJ11 mutations are rare in patients diagnosed with type 1 diabetes, the identification of a KCNJ11 mutation may have important treatment implications.

Item Type:	Journal Article
Subjects:	R Medicine > RC Internal medicine
Journal or Publication Title:	DIABETES
Publisher:	AMER DIABETES ASSOC
ISSN:	0012-1797
Date:	November 2004
Volume:	53
Number:	11
Number of Pages:	4
Page Range:	pp. 2998-3001
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/7808

Data sourced from Thomson Reuters' Web of Knowledge

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