Endocrine Abstracts

Myocardial gene expression and metabolism fluctuate over the course of the day, in association with changes in energy supply and demand. Recently, time-of-day-dependent oscillations in myocardial processes have been linked to the intrinsic cardiomyocyte circadian clock. Triiodothyronine (T3) is an important modulator of cardiac form and function. The genomic actions of T3 are triggered after its interaction with thyroid hormone nuclear receptors that ofte...

Introduction: Mediastinal paragangliomas are rare. These tumours can be associated with increased morbidity and mortality when invasive growth to the heart, great vessels, esophagus and trachea occurs. Surgical resection, if feasible, is the treatment of choice.Case report: A 50-year-old man presented with severe and refractory left gluteal pain radiating to the posterior thigh for two months. The patient had no relevant medical history and no other symp...

Objective: To outline the risk factors, the epidemiological profile, and the classification of diabetes type two foot ulcer.Methods: A prospective observational study, including all the people that sought out in a consecutive way, a tertiary diabetic foot service, from February 2002 until September 2012. At admission, the patients were examined and had their ulcers evaluated by only one observer, in accordance with the University of Texas classification....

Glyphosate is a broad spectrum herbicide that is effective against weeds, especially in association with transgenic glyphosate resistant crop systems, and represents approximately 30% of all herbicides used in agriculture. It was demonstrated that glyphosate has an activity of endocrine-chemical disruptor (ECD) in the reproductive axis, altering the production of testosterone and causing disturbances on the reproductive development of male offspring from dams treated during th...

Several studies demonstrated that the thyroid hormones (TH) downregulate the transcriptional rate of beta and alpha TSH subunits. Recent data showed that T3 also acts posttranscriptionally reducing the polyadenylation and translational rate of the beta TSH mRNA, when acutely administered to thyroidectomized (Tx) rats. This study aimed to investigate whether similar effects occur for the alpha subunit synthesis after acute administration of T3 or T4</...

Introduction: Thyroid hormones play an important role in bone metabolism. The potential action of prolonged levothyroxine therapy on bone mass reduction is still a matter of debate.Objective: The aim of the present study was to assess the effects of levothyroxine treatment on bone mineral density (BMD) and biochemical bone turnover markers.Methods: We determined thyroid function – TSH and free T4 (FT4), r...

Neuroendocrine neoplasia (NENs) are rare tumours that show features of neuroendocrine differentiation. Generally, NENs can be subdivides into high-grade neuroendocrine carcinomas (NECs) and low-to-intermediate grade neuroendocrine tumours (NETs). The most common Endodermal NETs’ localisations are the lungs, ileum, appendix, and rectum. Neuroectodermal NETs include medullary thyroid cancer (MTC), pheochromocytoma (PHEO), and paraganglioma (PGL). Nets are estimated to occur...

Introduction: Almost all type 1 diabetes mellitus (T1DM) patients have autoantibodies (ab) at disease onset. These ab prevalence varies according to patients’ age, origin and disease duration.Aim: Determine diabetes mellitus ab prevalence in a paediatric and adult T1DM Portuguese according to their age on diagnosis, gender and diabetes duration.Methods: Retrospective review of T1DM ab (glutamic acid decarboxylase 65 autoantibo...

Introduction: The bidirectional relationship of risk between breast cancer (BC) and thyroid cancer (TC) has been debated. Estrogens are proposed as agents implicated in the risk of developing TC promoting thyroid tumorigenesis. Therapies that reduce the effect of estrogens on their receptors in cancer cells are widely used.Objective: To correlate the use of hormonal therapy in BC with the prevalence of TC.Material and Methods: We p...

Introduction: The endocrine complications of COVID-19 remain largely unknown. Cases of central diabetes insipidus (CDI) have been reported after COVID-19, with hypophysitis being the most likely cause. COVID-19 vaccines potential adverse effects may mimetize some of these complications. We present a case of a woman who developed CDI one week after the 2 nd dose of BNT162b2 mRNA COVID-19 vaccine.Case Report: Female patient, 37 years old, with rheumatoid a...