Endocrine Abstracts

Several recent publications have advocated that patients with primary and secondary adrenal insufficiency (PAI and SAI) be given emergency injectable hydrocortisone to reduce the risk of adrenal crisis. There is a limited evidence-base for this recommendation and consequently the Edinburgh Centre for Endocrinology (ECE) does not routinely issue kits to its patients. This study assessed the frequency of hospital presentations in ECE’s AI patients, and the severity of their...

Background: Male hypogonadotrophic hypogonadism is an increasingly common cause of referral to endocrine clinics. Subnormal testosterone levels are frequently observed in obesity, type 2 diabetes mellitus and in the elderly. Endocrine Society guidelines suggest stratification of investigations based on the degree of androgen deficiency, with full pituitary function testing and MRI recommended only in those with serum testosterone levels less than 5.2 nmol/L. However the eviden...

Introduction: Continuous subcutaneous insulin infusion (CSII) or ‘pump’, therapy is used for intensification of insulin therapy. NICE guideline 2008 recommends CSII as an option for adults / children 12 years or older with insulin dependent diabetes mellitus (IDDM), when multiple daily injection (MDI) insulin therapy results in disabling hypoglycaemia/fails to reduce HbA1c levels below 8.5%, and for children below 12 years whenever MDI is impractical or inappropriate...

Aldosterone synthesis is heritable; a single nucleotide polymorphism (SNP) in the promoter of the aldosterone synthase gene (position −344, rs1799998) has been associated with an increased plasma aldosterone levels and hypertension. However, deletion of this site has no effect on gene transcription in vitro and therefore the mechanism that links genotype with phenotype is unclear.We identified a polymorphism at position −1651 T/C (rs13...

Dynamic changes in gene expression patterns and cell behaviour are evident throughout embryonic and neonatal germ cell development in the mouse. In the testes, the postnatal period represents a time when the male germline stem cells (GSCs) or, gonocytes migrate to the basement membrane of the seminiferous tubules preparing for a lifetime of spermatogenesis and is an important area of study. Here we use the transgenic mouse that expresses green fluorescent protein under the Oct...

Adiponectin, the most abundant peptide hormone secreted from adipose tissue, has been negatively correlated with obesity and can induce varying responses on bone. There are significant discrepancies in the published data, showing increased, decreased or no effects on bone turnover.We investigated the effects of adiponectin on the human osteosarcoma cell line Saos-2. After culture with varying concentrations of adiponectin (10–100 nM), supernatants w...

Objective: Aromatase deficiency in mice or men prevents conversion of androgens to oestrogens and results in central obesity and insulin resistance. In idiopathic obesity, higher aromatase mRNA levels in adipose tissue predict peripheral rather than central fat distribution, but any contribution of aromatase to metabolic complications is unknown. Here, we measured plasma steroids in a large cohort of men and post-menopausal women, in whom aromatase is the major source of oestr...

Introduction: Adult Growth Hormone Deficiency (AGHD) is associated with osteoporosis. Underlying mechanisms involved in the pathogenesis include reduced target-organ sensitivity to the effect of PTH. Growth Hormone Replacement (GHR) in AGHD leads to increased PTH target-organ sensitivity and consequently increased bone turnover and bone mineral density (BMD).Aims: We determined the effect of alendronate, given in addition to GHR, on PTH target-organ sens...

Adult Growth Hormone Deficiency (AGHD) is associated with osteoporosis. PTH is secreted in a circadian rhythm and temporal fluctuations in PTH concentration, particularly at night, appear to be important in the regulation of bone turnover. Serum phosphate is an important determinant of PTH, with changes in phosphate preceding fluctuations in PTH concentration. We examined the difference in PTH and phosphate circadian rhythmicity in AGHD patients with normal and reduced bone mi...

Adult Growth Hormone Deficiency (AGHD) is associated with reduced bone mineral density (BMD) and bone turnover. Abnormalities in PTH circadian rhythmicity, including blunted nocturnal rise in PTH concentration have been reported in AGHD and may underlie the pathogenesis of osteoporosis. Serum phosphate is an important regulator of PTH, with changes in phosphate concentration preceding fluctuations in PTH. We examined the effect of oral phosphate therapy on PTH circadian rhythm...