OBJECTIVE To examine the effect of genetic variation in KCNJ11 on the risk of Type 2 diabetes mellitus in Trinidadians. METHODS The coding and bordering intron-exon regions of the KCNJ11 gene were sequenced in 168 diabetic and 61 non-diabetic subjects who historically were thought to be of South Asian Indian ancestry as well as 66 diabetic and 59 non-diabetic subjects of African ancestry. All...

OBJECTIVE Activating mutations in the KCNJ11 and ABCC8 genes encoding the Kir6.2 and SUR1 subunits of the pancreatic ATP-sensitive K(+) channel are the most common cause of permanent neonatal diabetes. In contrast to KCNJ11, where only dominant heterozygous mutations have been identified, recessively acting ABCC8 mutations have recently been found in some patients with neonatal diabetes. These ...

Transient neonatal diabetes mellitus (TNDM) is diagnosed in the first 6 months of life, with remission in infancy or early childhood. For approximately 50% of patients, their diabetes will relapse in later life. The majority of cases result from anomalies of the imprinted region on chromosome 6q24, and 14 patients with ATP-sensitive K+ channel (K(ATP) channel) gene mutations have been reported....

Advances in the understanding of monogenic causes of diabetes and the discovery of single-gene mutations responsible for different phenotypes have greatly increased our knowledge of β-cell physiology. Such advances have had implications for the individual patient diagnosed with the specific monogenic cause of diabetes, especially in maturity onset diabetes of the young (MODY) and neonatal diabe...

A ctivating mutations in the KCNJ11 gene, which code for the ATPsensitive K channel subunit Kir6.2, are the most common cause of permanent neonatal diabetes. Recently, a switch from insulin treatment to oral sulfonylurea has been proposed if genetic testing reveals sulfonylurea-sensitive KCNJ11 mutations (1). Until now, hurdles for early treatment were 1) the time until the mutation analysis is...

OBJECTIVE Neonatal diabetes is a heterogeneous group of disorders with diabetes manifestation in the first 6 months of life. The most common etiology in permanent neonatal diabetes is mutations of the ATP-sensitive K(+) channel subunits; in transient neonatal diabetes, chromosome 6q24 abnormalities are the most common cause. RESEARCH DESIGN AND METHODS We report a sporadic case of diabetes wi...

AIMS Mutations in the KCNJ11 gene, which encodes the Kir6.2 subunit of the pancreatic KATP channel, cause neonatal diabetes. KCNJ11 is also expressed in the brain, and ~ 20% of those affected have neurological features, which may include features suggestive of psychiatric disorder. No previous studies have systematically characterized the psychiatric morbidity in people with KCNJ11 neonatal dia...

Neonatal diabetes can either remit and hence be transient or else may be permanent. These two phenotypes were considered to be genetically distinct. Abnormalities of 6q24 are the commonest cause of transient neonatal diabetes (TNDM). Mutations in KCNJ11, which encodes Kir6.2, the pore-forming subunit of the ATP-sensitive potassium channel (K(ATP)), are the commonest cause of permanent neonatal ...

DEND syndrome is a very rare syndrome of permanent neonatal diabetes mellitus, with an incidence of < 1/1000,000. It is defined as a triad of developmental delay, epilepsy, and neonatal diabetes. We report the case of a 9-month infant girl who presented with the most severe form of neonatal diabetes mellitus spectrum along with developmental delay and epilepsy. Genetic mutation testing confirme...

H eterozygous activating mutations in the KCNJ11 gene are a common cause of permanent neonatal diabetes (PNDM) (1,2). In contrast to the autoimmune type 1 diabetes, patients with KCNJ11 mutations do not have serological markers of autoimmune -cell destruction at disease onset (1,3–5). In such patients, hyperglycemia does not result from insulin-secreting cell destruction but rather from impaire...