Endocrine Abstracts

Thyroglobulin (Tg) is a tumoral marker of differentiated thyroid cancer (DTC). Iterative Tg assays are then mandatory for their follow-up. The maximum imprecision of any Tg measurement should be <5%. However, it is unlikely that current Tg assays can maintain such tight precision over the 6–12 months time period used for monitoring patients with DTC. This precision can be overcome by measuring archived frozen samples from the patient in the same run as the current spe...

The adrenal function of children is investigated similarly to adults’ using at rest (basal) and after testing serum cortisol concentration ((F)). di Iorgi et al. (JCEM 95:2132) showed a good diagnostic accuracy of glucagon testing investigating (F) increase. We retrospectively addressed the relevance of using, in children with short stature tested for GH deficiency, 1/ the normal reference range of our assay for basal (F) and 2/ the threshold provided by di Iorgi et al. o...

Objective: To extend knowledge about the clinical performances of a new chemiluminescent immunoassay (CLIA) for aldosterone set up in available analysers.Design and patient: We compared the results of a RIA assay to those of a CLIA assay in 198 serum and 80 urine samples from patients in endocrine and hypertension departments. Furthermore, for serum samples the concordance of results for postural tests was analysed.Results: RIA and...

Background: TSH-suppressive therapy in patients with differentiated thyroid carcinoma (DTC) leads to iatrogenic thyrotoxicosis and may be associated with alterations in body composition and bone mineral density (BMD). Its effects on a sarcopenia in elderly have not been in detail investigated.Objective: The objective was to compare changes in total and areal lean body mass (LBM), body fat mass (BFM) and BMD in postmenopausal female patients with DTC duri...

Background and aim: Parathyroid hormone (PTH) measurement is critical to evaluate bone status in patients with chronic renal failure as adynamic bone (AB) and bone with a high turnover (HTB) require different therapeutic options. Since the 2nd generation PTH assays recognise a non 1–84 PTH fragment in addition to the intact 1–84 PTH, a new assay defined as 3rd generation has been commercialised. The aim of this study was to evaluate, in dialysed patients, the rate of...

Folate and cobalamin are methyl donors (MD) needed for synthesis of methionine, precursor of S-adenosylmethionine (SAM), the substrate of methylation in epigenetic, and epigenomic pathways. The MD deficiency (MDD) leads to a decrease in SAM/SAH ratio and hyperhomocysteinemia, which has been related to osteoporosis in humans and disruption of development of epiphyseal cartilage in rat. However, the underlying molecular mechanisms remain elusive.M...

Irisin is a myokine correlated with lean body mass, despite its association with cardiovascular events (Mantzoros 2014). Increased muscle volume and lipoatrophy have been reported in female FPLD (Ji JCEM 214). Our aim was to determine whether irisin could help to distinguish certain lipodystrophic obesities from FPLD.Methods and patients: Circulating irisin levels (EIA Phoenix) were measured in 20 LMNA-related FPLD, 19 normal-weighed controls (H) and 13 ...

Background & aim: Autoimmune thyroid disease (AITD) is frequently accompanied by other organ-specific diseases. The aim of this study was to estimate the frequency of the association AITD-Biermer’s disease (pernicious anemia) by investigating the presence of intrinsic factor antibodies (IF-Ab) in the serum of patients with AITD.Methods: Sera from patients with biological signs of AITD (increased serum TSH levels associated to detectable thyroid ...

Familial Partial Lipodystrophy Syndromes (FPLD) are rare diseases characterized by partial lack of subcutaneous fat resulting in a severe metabolic syndrome and cardiovascular complications. Besides premature cell senescence, 2 main mechanisms are involved in FPLD: impaired adipocyte differentiation and lipid droplet, corresponding to two of the main causes of FPLD: LMNA-related FPLD2 and PLIN-related FPLD4. The objective of this study was to compare the clin...

Anti-Mullerian Hormone (AMH) is a 140 kDa gonadal glycoprotein of the TGFβ family, with two subunits linked by two disulfide bridges. Since a first assay in 1990, three generations of assays occurred: the 1st and 2nd were manual assays. The 3rd was automated: Access AMH Kits (Beckman Coulter) and Elecsys AMH (Roche). We had the opportunity to compare two new analysers with the Elecsys AMH: Vidas (Biomérieux) and Lumipulse G (Fujirebio). The later are one-step sandwic...