Endocrine Abstracts

Objective: To study the GLP-1 pattern of secretion after an oral glucose tolerance test (OGTT) in women in postpartum reassessment of previous gestational diabetes (GDM). To evaluate clinical and laboratory parameters that can influence GLP-1 secretion.Patients and methods: Forty-eight women with a history of GDM were assessed one year after childbirth determining clinical and analytical characteristics and OGTT with 75 g. We measured glucose, insulin an...

Introduction: Both insulin resistance and oxidative stress are implicated in the pathophysiology of various diseases such as type 2 diabetes mellitus, atherosclerosis or liver disease. Furthermore, the uncoupling protein-1 (UCP1) is involved in induced thermogenesis, related to the pathogenesis of obesity and diabetes. The aim of this study was to assess the impact of aerobic exercise on the inflammatory profile in patients with chronic hepatitis C.Metho...

Introduction: There is a reduction of the incretin effect in patients with type 2 diabetes secondary to altered secretion of incretin hormones and/or failed of its action.Objective: To study the GLP-1 secretion pattern after an oral glucose tolerance test (OGTT) in postpartum reassessment of women with previous GDM.Materials and methods: Prospective epidemiological study of 48 women with a history of GDM. We evaluated age, history ...

Although, diabetes type I patients in Portugal have complete and free access to HbA1c management (via multiple daily injections) only a few percentage has been provided an insulin pump – priority is given to children and women in fertile age trying to get pregnant. By the end of 2014, 1.150 insulin pumps had already been provided by the National Program of Insulin Pumps, but at least 3.000 patients with indication for insulin pump use were in waiting list. HbA1c pre-pump ...

Introduction: The incidence of glucose metabolism alterations during the follow-up of surgically treated insulinomas is largely unknown. Our aim was to evaluate the incidence, and the clinical characteristics, of diabetes and prediabetes in this population.Methods: We retrospectively analyzed the cases diagnosed as insulinomas in a Central Hospital in Portugal in the period between January 1980 and December 2015.Results: We identif...

Background: Germline heterozygous mutations in the MEN1 gene located on chromosome 11q13, predisposes to the development of tumors in multiple endocrine tissues. The MEN1 gene encodes a protein of 610 amino acid residues, known as menin which is involved in genome stabilization as well as in several steps of cellular division, conferring tumor suppression activity in MEN1-associated target tissues. The three main endocrine tissues affected by tumors in MEN1 are parathyroid (95...

Introduction: Insulinomas are pancreatic endocrine tumors originating in the beta cells, characterized by hypoglycemia resulting from insulin hypersecretion.Objectives: To characterize the demography, the clinical features, imagiological findings and pathological evaluation of the cases of insulinomas identified in the previous 35 years at São João Hospital.Methods: We retrospectively analyzed the cases diagnosed as insul...

Coupling the release of pituitary hormones to the developmental stage of the oocyte is essential for female fertility. It requires estrogen to have simultaneous positive and negative feedback effects on spatially-distinct regions of the hypothalamus. However, the mechanistic basis for this differential effect is not known. We have found that negative-feedback is mediated by the nuclear receptor Dax1, which is present in the arcuate hypothalamic nucleus and serves as a ligand-d...

Nutrient sensors mediating the stimulatory effects of food-derived carbohydrates and lipids on incretin and insulin secretion have been widely studied. However, mechanisms underlying amino acid regulation of those processes remain poorly understood. GPR142 was recently reported to be highly expressed in pancreatic beta cells and selectively activated by L-Tryptophan (L-Trp). Moreover, synthetic GPR142 agonists were demonstrated to stimulate glucose-dependent insulin secretion ...

Introduction: Cushing’s disease (CD) is a rare disorder caused by an ACTH-secreting pituitary adenoma. Transsphenoidal surgery (TSS) is the recommended first-line treatment. However, an equivocal or even normal preoperative MRI can preclude the surgical management and the outcome of these patients.Objectives: Evaluate the relationship between preoperative MRI and TSS efficacy in patients with CD.Methods: Retrospective cohort s...