Endocrine Abstracts

Background: Metastatic pheochromocytomas (PCs) and paragangliomas (PGLs) are rare neuroendocrine neoplasms with a <1:106 incidence, defined by the presence of metastatic disease besides recurrent or locally invasive disease.Aim: Retrospective analysis of clinical, biochemical/hormonal, imaging, genetic and histopathological features of patients with malignant PCs/PGLs diagnosed over 15 years.Results: Thirteen patient...

Introduction: Although computed tomography (CT) is the best mean to identify adrenal neoplasms there is still controversy of the concordance of the estimated radiological and histological size of the lesion. Since the size of adrenal tumours is a major criterion for surgical excision, we investigated whether recent and more sophisticated imaging techniques, can more accurately predict tumor’s size.Methods: We have retrospectively analyzed a series o...

Introduction: Alteration in the expression of clock-related genes has been observed in various diseases. Adrenal sensitivity to adrenocorticotropic hormone (ACTH) apart from the hypothalamo-pituitary-adrenal axis is also regulated by the intrinsic adrenal clock. A link between clock genes and glucocorticoid adrenal production has been suggested by in vitro and animal studies. In the present study we investigated clock genes expression in human benign tumors of the adr...

Introduction: The majority of adrenal neoplasms are benign while adrenocortical carcinomas (ACC) are rare with poor prognosis. Previous studies indicated that estrogens play important role in the etiology and progression of adrenocortical tumors. Estrogens exert genomic activities trough the estrogen-receptor (ER) subtypes α and β, while the non-genomic effects are mediated by membrane-bound-G-protein-coupled-ER-30 (GPR30). Although estrogens induce cancer cell ...

Introduction: The majority of adrenal neoplasms are benign while adrenocortical carcinomas (ACC) are rare with poor prognosis. Previous studies indicated that estrogens play important role in the etiology and progression of adrenocortical tumors. Estrogens exert genomic activities trough the estrogen-receptor (ER) subtypes α and β, while the non-genomic effects are mediated by membrane-bound-G-protein-coupled-ER-30 (GPR30). Although estrogens induce cancer cell ...

BackgroundRecent data have shown the anti-apoptotic effect of Chchd2 mitochondrial protein through the Bcl-2/Bax pathway in various cancers. Bax is regulated primarily by proteins-members of Bcl-2 family and mainly the Bcl-2 protein, which has been found to prevent Bax from accumulating in mitochondria. In response to apoptotic stimuli, Chchd2 decreases and loses its mitochondria localization accompanying by decreased Bcl-2/Bax interaction and increased ...

BackgroundAdrenocortical carcinoma (ACC) is a rare but very aggressive endocrine malignancy with poor survival. Histopathology is important for diagnosis, while in some cases immunohistochemical markers and gene profiling of the resected tumor may be superior to current staging systems to determine prognosis.AimHerein, we aimed to present the 20year experience at a tertiary Hospital in patients with ACCs and ...

Introduction: Pheochromocytomas (PCs) and paragangliomas are rare tumours occurring in about 0.6 cases per 100,000 person-years. Biochemically silent PCs with normal catecholamine levels due to lack of catecholamine secretion or subtle secretion within the established normal levels are even rarer. Up to date, biochemically silent PCs are poorly investigated.Aim: To assess the pre-, peri- and post-operative characteristics of patients with biochemically s...

Introduction: IGF-1 overexpression has been associated with tumorigenesis. IGF-1Ea, IGF-1Eb and IGF-1Ec isoforms were shown to be regulated differently in cancer. IGF-1Ec and IGF-1Eb overexpression has been positively associated with cell survival and proliferation in various tumors. Elevated IGF1Eb/IGF-1Ea ratio has been suggested as a biomarker of cervical cancer prognosis. Herein, we aimed to examine the expression of IGF-1 isoforms in human adrenocortical carcinomas (ACCs)...