Endocrine Abstracts

The thyrotroph tumors or pituitary neuroendocrine tumors (PitNET) classify as tumors of Pit-1 family. These tumors are rare and may be monohormonal, secreting only TSH, or plurihormonal, secreting TSH-GH±PRL, with or without acromegaly. The objectives of this retrospective study were to confirm the frequency of the plurihormonal subtype and to compare the clinical, biological and pathological characteristics of these two pathological subtypes. We retrospectively studied t...

Introduction: Genetic of pituitary tumors (PT) is incompletely understood. The aim of this study was to search for somatic copy number variations (CNV) in pituitary tumors and evaluate their prognostic impact on tumor recurrence.Methods: CGH array analysis (Agilent SurePrint G3 Human CGH+SNP Microarray 4×180 K) was performed on 196 fresh-frozen PT (67 gonadotroph, 31 corticotroph, 38 prolactinomas, 60 somatotroph). PT were classified according to th...

Background: While gonadotroph tumors are lacking both medical treatment options and prognostic markers, the tumor microenvironment represents a promising tool. The aim of this study was to 1) identify new tumor microenvironment actors in gonadotroph tumors, 2) gain insight into the tumorigenesis mechanisms driven by these tumor microenvironment cells, and 3) identify new tumor microenvironment-related prognostic markers, as well as new therapeutic targets.<p class="abstext...

Rationale: Pituitary tumours (PiTs) are a common and heterogeneous group of benign, slow-growing intracranial neoplasms arising from the sellar region. While recent advances have improved our knowledge of their cellular composition and the contribution of their tumour microenvironment (TME), most of PiT subtypes lack effective therapeutic treatments. Moreover, the mechanisms that occur in the early stage of PiT initiation remain to be elucidated partly due to the limited numbe...

Background: Medical treatment with cortisol-lowering drugs is commonly used following pituitary surgical failure or recurrence of hypercortisolism in patients with Cushing’s disease (CD). Studies using late-night salivary cortisol (LNSF) measurement have shown persistent disruption of the circadian secretion of cortisol despite normalization of UFC in a subset of medically treated CD patients. Study aim Our objective was to assess the long-term cortisol exposure in CD pat...

In the human adrenal gland, serotonin (5-HT), released by subcapsular mast cells stimulates corticosteroid secretion through activation of type 4 serotonin receptors (5-HT4R) positively coupled to cAMP/proteine kinase A (PKA) signaling pathway and calcium influx. The 5-HT4R is principally expressed in zona glomerulosa cells explaining why 5-HT strongly stimulates aldosterone production but only exerts a modest stimulatory action on cortisol. Interestingly, in primary pigmented...

Introduction: Acromegaly is characterized by excessive secretion of GH and increased IGF-1 levels caused by benign pituitary adenoma. The ACRO-POLIS study describes symptoms and comorbidities of acromegaly at diagnosis in a large cohort of patients diagnosed between 2009 and 2014 in France.Methodology: Observational, cross-sectional, multicentre study included adult patients with acromegaly diagnosed for less than 5 years. Data were collected retrospecti...

Introduction: Acromegaly is characterised by chronic, excessive secretion of GH and increased IGF1 levels caused by benign pituitary adenoma. This study aimed at describing the symptoms and comorbidities of acromegaly at diagnosis, in a large cohort of patients diagnosed between 2009 and 2014.Methods: Observational, cross-sectional, multicentre study conducted in France between September 2013 and June 2014. Adult patients with acromegaly diagnosed for &#...

Context: Somatostatin receptor type 5 (SST5) is inconsistently expressed by corticotroph tumors, with higher expression found in corticotropinomas having ubiquitin-specific protease 8 (USP8) mutations.Aims: To study the correlation between characteristics of corticotropinomasand SST5 expression/USP8 mutation status; to describe the response to pasireotide in 5 patients.Design: Retrospective cohort study.Metho...

Background: Pregnancy in women with hypopituitarism has been described as presenting high risks of maternal and fetal complications but this is only based on 2 small size series.Objective: To reassess the prognosis of pregnancy in women with hypopituitarism.Methods: Multicentric, observational, retrospective study including 39 pregnancies in 28 women with gonadotropic insufficiency and at least one other pituitary hormone deficienc...