Endocrine Abstracts

Perturbations in thyroid function are common in older individuals but their significance in the very old is not fully understood. We examined thyroid hormone status (serum TSH, FT4, FT3, rT3) at baseline in a cohort of 643 85-year-olds and followed their mortality and disability outcomes for 9 years. All cause mortality, cardiovascular mortality and disability according to categorical thyroid disease status and baseline thyroid hormone paramete...

Introduction: Type 1 iodothyronine deiodinase (DIO1) is one of the three enzymes regulating bioavailability of thyroid hormones. In contrast to DIO2 and DIO3, the specific cellular role of DIO1 remains controversial. Our previous studies showed that DIO1 expression in clear cell renal cell carcinoma (ccRCC) is decreased, followed by lowered intracellular T3 concentration. In this study we explored how re-introduction of DIO1 in ccRCC cells affects their mig...

Polycystic ovary syndrome (PCOS) is a disorder associated with infertility and metabolic disturbances. Ovaries of PCOS women contain an increased number of growing follicles. Such an ovarian phenotype is also observed in mice lacking the ovary-specific growth factor anti-Müllerian hormone (AMH). To determine the interaction between ovarian and metabolic function, we studied the metabolic phenotype of mice lacking AMH signaling as a model for an altered profile in ovarian ...

Introduction: Maternal hypo- and hyperthyroidism during pregnancy have been associated with high and low birth weights, which predispose for various diseases later in life, such as cardiovascular diseases and cancer. However, the effects of variation in maternal thyroid hormone levels within the normal range on fetal growth and birth weight are largely unknown.Methods: First trimester serum TSH, FT4 and TPO-antibody (TPOab) levels were determi...

Generation of H2O2 at the apical membrane of thyroid cells is essential for iodination of thyroglobulin. Dual oxidase 2 (DUOX2) is the catalytic core of the thyroidal H2O2 generator, and its deficiency leads to congenital hypothyroidism (CH) in humans and mice. The Dual oxidase maturation factor 2 (DUOXA2) is a recently identified endoplasmic reticulum (ER)-resident protein required for expression of DUOX2 activity.<p class="abst...

Introduction: Resistance to thyroid hormone (TH) can be caused by a failure of TH to enter the cell, or by a lack of action of intracellular TH.Cases: Patient A, a 60-year-old man, presented with an elevated TSH (15.8 mU/l (reference range: 0.4–4.3 mU/l)), an elevated FT4 (29.5 pmol/l (11–25 pmol/l)), and a normal T3. Reverse T3 (rT3), the inactive metabolite of T4, was clearly elevated (0.82 nmol/l (0.14–0.34 nmol/l)). His medical history...

The prenatally androgenised sheep, like the Rhesus monkey, is an informative model for polycystic ovary syndrome (PCOS). We have recently demonstrated that AMH protein is reduced in preantral follicles of PCOS ovaries (Stubbs et al, Endocrine Abstracts 2004, 7 P186 ). We hypothesized that reduced expression of AMH is an effect of androgen excess. The aim of this study was to examine AMH immunostaining in ovaries from prenatally androgen-treated and control ewes. Ovaries were t...

Anti-Mullerian hormone (AMH) is expressed in the ovary, in granulosa cells (GC) of preantral and antral follicles. Mice lacking the AMH gene show an increase in the proportion of early growing follicles and a reciprocal decrease in the primordial pool, suggesting an important role in early follicle growth. Little is known about the expression of AMH in the human ovary. Recent studies have shown that the proportion of follicles entering the growing pool is increased in PCO, sim...

Background: In January 2018, the 8th edition of the AJCC/TNM staging system for differentiated thyroid cancer (DTC) was introduced in clinical practice. Studies evaluating this 8th edition so far only comprised patients with papillary thyroid cancer (PTC) or made no distinction between PTC and follicular thyroid cancer (FTC). Therefore, we evaluated the prognostic value of the AJCC/TNM 8th edition in a European population with DTC, and subsequently distinguished PTC and FTC pa...

BackgroundThe 2015 American Thyroid Association (ATA) Risk Stratification System for differentiated thyroid cancer (DTC) is designed to predict response to therapy and recurring disease. Although age is not incorporated as a risk factor, recent research suggests that the addition of age can improve this system. However, these studies comprised low number of patients with ATA High Risk, low numbers of patients with follicular thyroid cancer (FTC), and did...