Endocrine Abstracts

Introduction: Graves’ disease (GD), similarly to most autoimmune disease, is triggered by environmental factors in genetically predisposed individuals. Particular HLA alleles increase or decrease GD risk. We have recently demonstrated novel, previously not reported association between a presence of alleles HLA-B*39:06, -B*37:01, -C*14:02, -C*03:02, -C*17:01, -DRB1*14:01 and GD. These alleles are independent risk factors, with no linkage disequilibrium with other,...

Introduction: Subacute thyroiditis is a thyroid inflammatory disease, triggered mainly by viral factors in genetically susceptible individuals. Up to 2020, only HLA-B*35 was confirmed as SAT-related. However, obviously in HLA-B*35-negative patients, some other genetic background occurs. Material and Methods: We performed HLA-typing using high resolution NGS method in different groups of patients with SAT and demonstrated the new association between HLA a...

Background: Copeptin (pre-proAVP) secreted in equimolar amounts with vasopressin (AVP) closely reflects AVP release. Previously it was shown that copeptin is stimulated in standard pituitary function tests acting through hypothalamic centres. Furthermore, copeptin has been shown to subtly mirror stress potentially mediated via CRH. To further test a potential direct interaction of CRH with copeptin release which could augment AVP effects on pituitary function, we investigated ...

Introduction: TSH seems to play direct role in bone metabolism. TSH receptors are expressed on osteoblasts and osteoclast precursors. Osteocalcin (OC) is well known marker of bone formation, whereas collagen type I crosslinked C-telopeptide I (CTX) is marker of bone resorption. Sclerostin is a protein, recently found to inhibit bone formation, while parathormone (PTH) inhibits sclerostin production. The aim of the study was to estimate sclerostin, OC, CTX and PTH levels after ...

Introduction: In pregnant women there is a twofold increase in synthesis of calcitriol, i.e. the active metabolite of vitamin D. Literature data point to adverse effects of vitamin D deficiency during pregnancy both for pregnant woman and foetus. Polish data on the effects of vitamin D deficiency in this group are scarce.Aim of the study: The aim of this study was to evaluate the relationship between vitamin D3 concentrations in pregnant women on health ...

Introduction: Long-lived mice with targeted disruption of the GHRH gene (GHRH knockout; GHRHKO) constitute a unique animal model of altered somatotrophic signaling and are characterized by reduced body mass and size, low plasma IGF1 and enhanced insulin sensitivity. These features are also observed in long-lived GH receptor knockout (GHRKO) mice, characterized by increased visceral obesity that usually promotes insulin resistance. GHRKO mice have also increased subcutaneous fa...

Introduction: Turner syndrome (TS) is a condition caused by structural or numerical abnormalities of X chromosome. Growth deficiency is characteristic for patients with TS, and particular karyotype abnormalities of the X chromosome may be associated with different responsiveness to human GH (hGH) therapy. The aim of the study was to determine the effect of TS karyotype on growth velocity during hGH therapy in TS.Methods: 23 TS patients treated with hGH w...

Background: Copeptin, the C-terminal part of the arginine vasopressin (AVP) precursor, is a 39-amino acid peptide stoichiometrically secreted with AVP in 1:1 ratio from the posterior pituitary. In contrast to AVP, copeptin remains stable ex vivo for several days in serum or plasma. Here, we investigated the use of the copeptin assay in the diagnostic workup of patients with suspected anterior pituitary dysfunction.Patients and methods: We measur...

Introduction: Copeptin can be used as a tool to directly assess serum antidiuretic hormone (ADH) level. A certain pool of ADH are synthesized in hypothalamus, together with corticoliberin (CRH). Then they are released into the pituitary portal circulation, where through the V1bR receptor ADH stimulates adrenocorticotropic cells and ACTH secretion, followed by cortisol and catecholamines production. The stimulus for ADH secretion is, among others, stress. In turn, presynaptic s...

Vertebral morphometric X-ray absorptiometry (MXA) is a new tool developed to evaluate the presence of vertebral fractures – main symptoms of osteoporosis. The study aimed at comparing selected morphometric parameters of vertebrae in men and women in various age groups. 965 healthy persons have been involved in the study: 616 female and 349 male, their age ranging from 18 to 79 years. Lateral densitometric scans of the thoracic-lumbar spine were made using Expert-XL densit...