Endocrine Abstracts

Folliculostellate (FS) cells within the anterior pituitary gland produce cytokines and growth factors which are regulated by molecules produced by neighbouring endocrine cells. There are many factors that could potentially be responsible for this intercellular communication that is mediated via connexins (Cx) and gap-junctions. We thus investigated the effect of co-culturing lactotrophs (MMQ) and FS cells (TtT/GF) on Cx43 expression. Our in vitro model system consists o...

IntroductionTrue resistance to cabergoline in patients with hyperprolactinaemia has only rarely been reported. We describe a patient with macroprolactinoma who initially responded to cabergoline, but then developed a progressive increase in PRL levels.Clinical caseA 78-year-old male presenting with headache and left temporal hemianopia was found to have a macroprolactinoma with suprasellar/cavernous sinus ext...

GH has diverse direct effects including the induction of lipolysis in adipocytes and mineralisation in bone. Interestingly, pluripotent mesenchymal stem cells can be isolated and cultured from adult bone marrow and induced to differentiate in vitro to both adipocytes and osteoblasts. GHR activation can be coupled to JAK2/STAT5 and the ERK (MAPK) pathway. We have therefore studied the evolution of GHR-associated cell signalling in adult rat BMSC’s during differentia...

We previously showed that adenosine stimulates IL-6 secretion from TtT/GF cells suggesting that adenosine is an important regulator of folliculostellate (FS) cell function. Gap-junction communication is also important for FS cell function so the aim of this study was to investigate the action of adenosine on connexin 43 (Cx 43) expression and intercellular communication.Adenosine production, as measured by reverse-phase fluorescent HPLC, was easily detec...

Thyroid cancer is the commonest malignancy seen in endocrine practice. Audits of clinical practice have revealed significant variations in management, and the British Thyroid Association have published guidelines (2002) to address this. The aim of our study was to assess the care-stage at which practice falls short of agreed standards. We performed retrospective case note review of 83 patients (72 female) followed in a specialist thyroid cancer clinic over 5 years. Histology d...

Clinical case: A 30-year-old Eritrean presented as an emergency to the orthopaedics surgeons with radicular back pain. Following L3/L4 spinal decompression, he was noted to be classically acromegaloid and was transferred to the Endocrine Unit, where a mild bitemporal upper quadrantinopia was noted. GH was massively elevated at 1200 mU/L, IGF1>130 nmol/L, with associated corticotroph and gonadotroph insufficiencies requiring replacement. MRI showed a large pituitary adenoma...

The nucleoside adenosine is an important regulator of interleukin-6 secretion from the folliculostellate (FS) cells of the anterior pituitary gland but the source of adenosine in this scenario is unknown. Therefore the aim of this study was to investigate secretion of adenosine and the expression of adenosine forming and metabolising enzymes in the pituitary gland.Ecto-5/-nucleotidase (CD73), adenosine kinase and adenosine deaminase (AD) were ...

We report two patients (AB 41 years, LS 55 years) presenting with symptoms of hyperprolactinaemia. Prolactin levels were moderately elevated: 1539 (AB), 1186 (LS) (NR 59-619 mU/L). The remainder of the pituitary profile was normal. Neither patient had visual field defects. MRIs (without contrast) reported pituitary macroadenoma with suprasellar extension but no optic chiasm compression. The initial diagnosis was of probable non-functioning adenoma causing stalk compression. Bo...

Backround: Androgenic anabolic steroids (AAS) are reported to increase cardiovascular risk by causing adverse changes in lipid profiles, impaired glucose tolerance, hyperhomocystinaemia and hypertension. Recent studies have also suggested impaired vascular reactivity in this group.Aim: To assess cardiovascular risk factors and arterial stiffness in AAS using and non-steroid using male bodybuilders and to compare them with healthy controls.Methods: Studies were conducte...

Introduction: Worldwide guidance advocates regular HbA1c testing for people with diabetes mellitus, usually 2-4/yr. We previously showed that HbA1c testing frequency is linked to outcome in terms of HbA1c control. Here we examine the effect of variability (standard deviation = SD) in test interval on change in HbA1c over 7 yrs (Jun 2012-Jul 2019) using laboratory data.Methods: We focused on people with HbA1c within the first 2 years who also had a HbA1c ...