Association of environmental markers with childhood type 1 diabetes mellitus revealed by a long questionnaire on early life exposures and lifestyle in a case-control study.

Background: The incidence of childhood type 1 diabetes (T1D) incidence is rising in many countries, supposedly because of changing environmental factors, which are yet largely unknown. The purpose of the study was to unravel environmental markers associated with T1D.

Methods: Cases were children with T1D from the French Isis-Diab cohort.

Mutations in the maternally imprinted gene MKRN3 are common in familial central precocious puberty.

Context And Objective: Idiopathic central precocious puberty (iCPP) is defined as early activation of the hypothalamic-pituitary-gonadal axis in the absence of identifiable central lesions. Mutations of the makorin RING finger 3 (MKRN3) gene are associated with iCPP. We aimed to assess the frequency of MKRN3 mutations in iCPP and to compare the phenotypes of patients with and without MKRN3 mutations.

PROKR2 variants in multiple hypopituitarism with pituitary stalk interruption.

Context: Pituitary stalk interruption represents a frequent feature of congenital hypopituitarism, but only rare cases have been assigned to a known genetic cause.

Objective: Using a candidate gene approach, we tested several genes as potential causes of hypopituitarism with pituitary stalk interruption. We hypothesized that ectopic posterior pituitary may be a consequence of defective neuronal axon projections along the pituitary stalk or defective angiogenesis of hypophyseal portal circulation.

Microvascular diabetes complications in Wolfram syndrome (diabetes insipidus, diabetes mellitus, optic atrophy, and deafness [DIDMOAD]): an age- and duration-matched comparison with common type 1 diabetes.

Objective: Some previous studies suggested that patients suffering from Wolfram syndrome or DIDMOAD (diabetes insipidus, diabetes mellitus, optic atrophy, and deafness) might be relatively preserved from diabetic retinopathy and nephropathy. However, these data were not conclusive because either observations were only anecdotic or did not match with control type 1 diabetic populations.

Research Design And Methods: A group of 26 French diabetic patients with DIDMOAD was compared with a population of 52 patients with common type 1 diabetes matched for age at diabetes diagnosis (8.

An uncommon phenotype with familial central hypogonadism caused by a novel PROP1 gene mutant truncated in the transactivation domain.

Context: PROP1 gene mutations are usually associated with childhood onset GH and TSH deficiencies, whereas gonadotroph deficiency is diagnosed at pubertal age.

Objectives: We report a novel PROP1 mutation revealed by familial normosmic hypogonadotropic hypogonadism. We performed in vitro transactivation and DNA binding experiments to study functional consequences of this mutation.

[Congenital hypopituitarism: when should transcription factor gene screenings be performed?].

THE GENETIC ORIGIN INCREASINGLY INCRIMINATED: Congenital pituitary hormone deficiencies represent conditions of hypopituitarism resulting from abnormal pituitary ontogenesis. This group of genetically determined diseases has considerably widened with the development of molecular biology. Many transcription factors playing a role in pituitary development have been identified, and their mutations reported as causes of isolated or multiple pituitary hormone deficiencies.