Endocrine Abstracts

Introduction: Type 2 deiodinase (D2) catalyses intracellular T3 production in several human tissues including pituitary gland, hence occupying an important role in the feedback regulation of TSH secretion. Although several previous researches have shown that Thr92Ala D2 polymorphism with decreased D2 enzymatic activity influences the levothyroxine dose requirement and the set point of the hypothalamus–pituitary–thyroid axis for postoperative TSH suppressiv...

Background: Guanine nucleotide-binding protein, α stimulating (GNAS) gene have been reported to be associated with GH secreting pituitary adenoma. Approximately 40% of patients with acromegaly have GNAS mutation. In this study, we investigated the prevalence of GNAS mutation in Korean acromegalic patients and assessed the correlation with the biochemical or clinical characteristics.Method: We studied acromegalic patients who underwent surgery betwee...

Prolactinoma predominantly occurred in young women of reproductive age. But there are limited data about the effect of pregnancy and lactation on prolactinoma progression. We evaluated the safety of dopamine agonists including bromocriptine and cabergoline and pregnancy outcome in prolactinoma patients. Patients diagnosed with prolactinoma who experienced pregnancies were included. Sellar MRI and serum prolactin levels were performed before and after pregnancy and lactation. T...

Purpose: We conducted this study to determine the prevalence and incidence of pituitary tumors in South Korea.Methods: This is a nationwide population- based retrospective study. We analysed two national databases, the Korean National Health Insurance (NHI) claims database and Rare Intractable Disease (RID) registration database, which include information on every patients with pituitary tumor diagnosed through uniform criteria from 2009 to 2013. Pituita...

Few studies have investigated the intracellular signaling pathways mediating the effects of glucagon-like peptide-1 (GLP-1) secretagogues in enteroendocrine L cells. Specific receptors, channels, and intracellular signaling proteins expressed by the L cells have only begun to be characterized. The present study aimed to investigate the role of the olfactory receptor (OR) OR51E1 in GLP-1 secretion. We verified the expression of olfactory marker protein (OMP), an indicator of OR...

Olfactory marker protein (OMP) is a marker of olfactory receptor-mediated chemoreception, even outside the olfactory system. Here, we report that OMP expression in the pituitary gland plays a role in basal and thyrotropin-releasing hormone (TRH)-induced prolactin (PRL) production and secretion. We found that OMP was expressed in human and rodent pituitary glands, especially in PRL-secreting lactotrophs. OMP knockdown in GH4 rat pituitary cells increased PRL production and secr...

Objectives: Prolactin (PRL) normalization after 3 months of Cabergoline (CAB) treatment are useful predictors of responsiveness in patients with prolactinoma. However, differences within the PRL normalization cut-off value have not been identified.Methods: We reviewed the medical records of patients with prolactinomas who were treated with CAB as a primary drug at Severance Hospital. We included patients who had a full dataset of pituitary hormone assays...

Background: The body mass index (BMI) is the most widely used method of assessing fat accumulation, and is recognized as an independent risk factor for cardiometabolic diseases. However, there might be substantial variations in the fat or muscle amount among persons with a similar BMI. The aim of the present study was to investigate whether BMI and skeletal muscle mass (SMM) estimated from by bioelectrical impedance analysis (BIA) are associated with carotid atherosclerosis in...

Silent corticotroph adenomas (SCAs) are difficult to distinguish from other non-functioning pituitary adenomas (NFPAs) preoperatively. This study assessed the preoperative clinical parameters associated with SCAs. After excluding patients with increased 24-h urinary free cortisol, 341 patients who underwent surgery for NFPAs during 2011–2016 with available preoperative combined pituitary function test (CPFT) and immunohistochemical staining results were enrolled. The pati...