Multi-locus imprinting disturbance (MLID): interim joint statement for clinical and molecular diagnosis.

Background: Imprinting disorders are rare diseases resulting from altered expression of imprinted genes, which exhibit parent-of-origin-specific expression patterns regulated through differential DNA methylation. A subgroup of patients with imprinting disorders have DNA methylation changes at multiple imprinted loci, a condition referred to as multi-locus imprinting disturbance (MLID). MLID is recognised in most but not all imprinting disorders and is also found in individuals with atypical clinical features; the presence of MLID often alters the management or prognosis of the affected person.

Neonatal diabetes in Ukraine: incidence, genetics, clinical phenotype and treatment.

Background: Neonatal diabetes has not been previously studied in Ukraine. We investigated the genetic etiology in patients with onset of diabetes during the first 9 months of life.

Methods: We established a Pediatric Diabetes Register to identify patients diagnosed with diabetes before 9 months of age.

Germline mutations in the oncogene EZH2 cause Weaver syndrome and increased human height.

The biological processes controlling human growth are diverse, complex and poorly understood. Genetic factors are important and human height has been shown to be a highly polygenic trait to which common and rare genetic variation contributes. Weaver syndrome is a human overgrowth condition characterised by tall stature, dysmorphic facial features, learning disability and variable additional features.

Beta-cell dysfunction in classic transient neonatal diabetes is characterized by impaired insulin response to glucose but normal response to glucagon.

Objective: To investigate beta-cell function and the long-term health of four case subjects presenting with chromosome 6-associated transient neonatal diabetes (TND).

Research Design And Methods: Two unrelated case subjects presenting with paternal uniparental isodisomy of chromosome 6 (UPD6) and two siblings with a paternally inherited duplication of 6q24 were studied. Three case subjects presented with neonatal diabetes that recurred at 4-17 years, while diabetes was incidentally discovered in the other case subject at 14 years of age.