Endocrine Abstracts

Annexin 1 (ANXA1) plays an essential role in the 'early-delayed' feedback effects of glucocorticoids (GCs) on ACTH release. Evidence that ANXA1 is externalised from pituitary cells in response to GCs, together with the finding that the protein is localised mainly to the folliculo-stellate (FS) cells, has led us to propose that ANXA1 is a paracrine mediator of GC action in the anterior pituitary. To address this hypothesis we have examined ANXA1-dependent GC actions in co-cultu...

Annexin I, a phospholipid and calcium binding protein, plays a well demonstrated role in the early delayed inhibitory feedback actions of glucocorticoids in the pituitary. Annexin I is localized in folliculostellate (FS) cells and glucocorticoids act on these cells to externalize annexin I at specific foci on FS cell processes (Chapman et al, 2002 Endocrinology, in press). Annexin I lacks a signal sequence to direct it into the secretory pathway and the foci of externalized an...

Knockout studies have demonstrated that FSHbeta knockout (FSHbKO) and FSH receptor knockout (FSHRKO) female mice are infertile due to block of follicle development at the pre-antral stage. The ovaries are reduced in size and uteri are atrophic. However, a proportion of FSHRKO and FSHbKO mice develop ovarian and uterine hypertrophy in middle age (Abel et al, 2001). In order to investigate further brain-pituitary-gonadal interrelationships the aim of the present study was to com...

BackgroundHyponatremia is associated with increased risk of bone fragility and fractures. In vitro studies suggest a role of hyponatremia in stimulating osteoclast activation, whereas other studies rather revealed a possible role of acute hyponatremia in impairing osteoblast function. We aimed to assess whether and how correction of hyponatremia in hospitalized patients with the syndrome of inappropriate antidiuresis (SIAD) has an impact on bone...

Background: Whether combination therapy of levothyroxine and liothyronine increases the risk of atrial fibrillation remains a topic of debate.Objectives: The objective of this study was to investigate the risk of atrial fibrillation in individuals with hypothyroidism treated with a combination of levothyroxine and liothyronine.Methods: We conducted a retrospective cohort study using individual-level linkage of Danish nationwide reg...

Background: Subclinical hypothyroidism is associated with a number of cardiovascular risk factors such as hypertension, hypercholesterolemia, and diastolic dysfunction, but only limited data exist on long-term outcome of levothyroxine substitution therapy.Objectives: To examine effects of levothyroxine substitution treatment on mortality in patients with subclinical hypothyroidism.Study design: Historical cohort study.<p class=...

ESE Young Investigator AwardBackground: It is still discussed if subclinical hyperthyroidism and ‘high-normal’ thyroid function are risk-factors for cardiovascular mortality.Objectives: To examine the risk of cardiovascular and all-cause mortality in relation to subclinical hyperthyroidism.Methods: Patients consulting their general practitioner from 2000 to 2009 in Copenhagen, Denmark, who ...

Introduction: Hypothyroidism has detrimental effects on the cardiovascular system but controversy remains over the benefit of levothyroxine substitution in heart failure (hf). The aim of this register based cohort study was to examine the effects of levothyroxine treatment on all-cause mortality in patients with hf.Methods: The study cohort comprised all Danish citizens aged ≥18 years admitted with hf in 1997–2012 and still alive 30 days after...

Introduction: Subclinical hypothyroidism (SCH) is a common condition and can lead to impaired systolic and diastolic cardiac function. However, controversy remains over the potential benefits of levothyroxine substitution in patients with SCH and concomitant heart disease. We aimed to examine the effects of levothyroxine treatment on all-cause mortality in patients diagnosed with SCH and heart disease.Methods: Primary care patients aged 18 years and olde...

Primary aldosteronism (PA) describes the most frequent cause of secondary arterial hypertension. Aldosterone itself represents a BP-independent cardiovascular risk factor associated with increased rates of morbidity and mortality. Recently a worsening of lipid metabolism after treatment has been described.Objective: Our aim was to analyse changes in lipid parameters according to treatment outcome in PA patients. Data of 215 consecutive PA patients with u...