Endocrine Abstracts

Nuclear corepressor 1 (NCoR) associates with nuclear receptors and other transcription factors leading to transcriptional repression. Genomic studies have shown the presence of inactivating mutations of the NCoR gene in human tumours and we have found that NCoR depletion with siRNA in hepatocarcinoma SK-hep1 cells enhances invasion, tumour growth and metastasis in nude mice, while expression of the thyroid hormone receptor β (TRβ) increases NCoR levels, repr...

Background: Typing somatostatin receptor (SSTR) expression in neuroendocrine tumors (NETs) is of relevance to target an octreotide-based diagnostic approach and treatment. The expanding use of immunohistochemistry to detect SSTR is to date not paralleled by an accurate methodological setting and standardized interpretation of the results.Objective: A multicentric study was designed to compare SSTR immunohistochemical expression with in vivo scinti...

Objective: Cushing’s disease (CD) is the most common cause of hypercortisolism after iatrogenic origin, it represents approximately 70% of patients with endogenous Cushing’s syndrome (CS) and ectopic ACTH secretion (10%). CD is caused by a corticotropin-secreting pituitary neuroendocrine tumor (ACTH-secreting Pit-NETs), 95% of cases as a microadenoma. In ACTH-dependent CS, differential diagnosis between CD and ectopic CS must be established. 40% of CD cases, any tumo...

Background: Multiple endocrine neoplasia type 1 (MEN1) is a rare hereditary autosomal dominant tumor syndrome caused by inactivating mutations of the tumor suppressor gene MEN1 which encodes the protein menin. It is characterized by the occurrence of tumors involving two or more endocrine glands, primarily parathyroid, entero-pancreatic, and anterior pituitary, as well as non-endocrine neoplasms. Glucagonomas occur in fewer than 3% of patients with MEN1, causing hyper...

Objectives: Variations of gut microbiota composition have been described in patients with different thyroid disorders. The site of oral levothyroxine (T4) absorption is represented by the small intestine and it has been demonstrated that some bacterial strains possess enzymatic activity that may affect iodothyronine deconjugation, process probably involved in thyroid hormone enterohepatic recycling. The relationship between gut microflora composition and oral T4 requirement ha...

Purpose: The present study aims to investigate the effects of hyperprolactinemia (HPRL) and its pharmacological control with Cabergoline (CAB) on the risk of fractures in male patients affected by prolactinoma.Methods: Observational single-center study was conducted on 39 male patients (median age 49±12,4 y) with prolactinoma, including 37 with macroprolactinoma and 2 with empty sellae. In patients PRL levels at diagnosis (PRL 0’), PRL at evalu...

Purpose: Dopaminergic system is implicated in the development of sleep disorders, and dopaminergic agents are used in clinical practice to treat daytime sleepiness and sleep disorders. The present study aimed at investigating the effects of hyperprolactinemia and its control with dopamine-agonists (DA) on sleep quality, excessive daytime sleepiness (ESS) and risk of obstructive sleep apnea syndrome (OSAS) in prolactinomas.Methods: A single-centre study w...

Introduction: The development of new pharmacological classes for type 2 diabetes (T2D) treatment with extra-glycaemic benefits has led to the update of the treatment algorithm, presenting new effective alternatives to patients’ insulinization. The present study aims to evaluate the evolution of prescription and its impact in metabolic control of patients enrolled on an educational diabetes program of a tertiary hospital.Objectives: To evaluate trend...

Epigenetic deregulation is emerging as a component of the parathyroid tumorigenesis. We identified a long non-coding RNA (LNCRNA) signature clearly distinguishing parathyroid adenomas (PAds) and carcinomas from normal glands. Among the deregulated LncRNAS, HAR1B was upregulated in PAds harboring the common chromosome 11q loss of heterozygosity (Chr11q-LOH; n=10) compared with PAds harboring normal chromosome 11 haplotype (Chr11q-WT; n=12; P&...

Adrenocortical carcinomas (ACCs) are rare endocrine tumors with poor prognosis. The insulin-like growth factor 2 (IGF2) is overexpressed in the great majority of ACC, and IGF2/IGF1R pathway acts as a proliferative autocrine loop, but to date IGF1R-targeted therapies have demonstrated a limited efficacy and the molecular mechanisms regulating this pathway are still unknown. The cytoskeleton acting-binding protein filamin A (FLNA), determinant in cancer progression and metastasi...