The International Journal of Romanian Society of Endocrinology / Registered in 1938

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  • General Endocrinology

    Çimen AR, Cerit ET, Iyidir OT, Karakus R, Uyar BB, Toruner FB, Cakir N, Arslan M

    Serum Omentin-1 Levels and Endothelial Dysfunction in Obesity

    Acta Endo (Buc) 2017 13(2): 138-143 doi: 10.4183/aeb.2017.138

    Introduction. Our aim was to investigate the relationship between serum omentin-1 levels and endothelial dysfunction in obese patients. Material and Methods. We evaluated 50 obese patients, and age/gender matched 45 healthy non-obese subjects as controls. Oral glucose tolerance test, lipid parameters, uric acid levels, homeostatic model assessmentinsulin resistance (HOMA-IR) index, serum omentin-1 levels and flow mediated dilatation (FMD) % were measured in all subjects. Body compositions were analyzed with bioelectrical impedance method using a Tanita Body Composition Analyzer and ViScan. Results. Serum omentin–1 levels were found significantly lower in obese population compared to the control subjects. FMD response was significantly decreased in obese population. There was a significant positive correlation between serum omentin–1 levels and FMD response (r=0.359, p<0.001). Serum omentin–1 levels were negatively correlated with body mass index (BMI), waist circumference, total fat percentage, visceral fat, fasting insulin and HOMA-IR index. Conclusion. Lower serum omentin–1 levels and decreased FMD response may be an early marker of endothelial dysfunction in obese patients.
  • General Endocrinology

    Yalcin MM, Ayvaz G, Gulbahar O, Toruner F, Ozkan C, Altinova AE, Akturk M, Arslan M

    A Rare Cause of Discordant TSH: MACRO-TSH

    Acta Endo (Buc) 2015 11(2): 170-173 doi: 10.4183/aeb.2015.170

    When the laboratory results are not compatible with the clinical features of the patient, the presence of assay interference should be considered. Patient and Methods. Here, we report a case of macro-thyroid stimulating hormone (macro-TSH) in a 31 yearold woman who had hypothyroidism due to thyroidectomy as well as discordant TSH levels with the clinical findings. Her TSH level was spuriously high with low levels of free T3 and T4 on levothyroxine treatment and she had only mild fatigue. To screen for the presence of interference, we performed TSH measurements in different platforms and serial dilution of the sample. Her rheumatoid factor was found to be negative. Results. The testing for heterophile blocking and non-specific anti TSH antibodies suggested lack of interference. We did further test for the clinical suspicion of interference and TSH decreased to 29.8 μIU/mL from 210.5 μIU/mL (recovery: 14.1%) after polyethylene glycol (PEG) precipitation indicating the existence of macro-TSH. After two months of increased dosage of levothyroxine, her TSH level was still very high (192.0 μIU/mL), but free T3 and free T4 increased to normal levels. PEG precipitation test was reperformed and TSH was decreased to 46.0 μIU/mL from 192.0 μIU/mL (recovery: 24.0 %). Her levothyroxine replacement dosage was not increased since free T3 and T4 levels were normal. Conclusions. If there is a suspicion for the discordant TSH level, the presence of macro-TSH by PEG precipitation should be investigated even though first step investigations for interference were found to be negative.
  • General Endocrinology

    Korkmaz HA, Karaarslan U, Eraslan C, Atila D, Hazan F, Barisik V, Ata ES, Etlik O, Yildiz M, Ozkan B

    Screening of PROP-1, LHX2 and POU1F1 Mutations in Patients with Ectopic Posterior Pituitary Gland

    Acta Endo (Buc) 2018 14(3): 300-306 doi: 10.4183/aeb.2018.300

    Objective. Ectopic posterior pituitary gland (EPP) is usually characterized by an abnormal pituitary stalk and hypoplasia of the anterior hypophysis. The genetic mechanisms involved in the development of EPP remain uncertain. The aim of this study is to determine whether mutations in the three genes, PROP-1, LHX2, and POU1F1, are associated with the risk for and the characteristics of EPP. Methods. In the Endocrinology Outpatient Clinic of “Dr. Behcet Uz” Children’s Hospital, 27 patients with EPP were submitted to sequencing analyses of the PROP-1, LHX2, and POU1F1 genes. Results. Growth hormone, thyrotropin, corticotropin, gonadotropin, and vasopressin deficiency were observed in 22 (81.5%), 23 (85.2%), 17 (63%), 14 (51.9%), and two (7.4%) patients. Thirteen patients (48.1%) presented with hyperprolactinemia. Fourteen patients (51%) had a history of birth dystocia, and 12 cases (42.1%) had a history of breech presentation. Central nervous system abnormalities included five cases with corpus callosum agenesis, one case with schizencephaly, and one case with Chiari type 1 malformation. We identified a homozygous p.S109* mutation in exon 2 in one male patient with EPP and two different PROP1 gene polymorphisms (A142T or c.109+3 G>A polymorphism) in thirteen patients. Conclusions. Our results suggest that PROP1 gene abnormalities might explain the genetic mechanisms involved in the development of EPP.
  • Endocrine Care

    Yilmaz Oztekin GM, Genc A, Arslan S

    Vitamin D Deficiency is a Predictor of Mortality in Elderly with Chronic Heart Failure

    Acta Endo (Buc) 2021 17(3): 358-364 doi: 10.4183/aeb.2021.358

    Context. The prevalence of both heart failure and vitamin D deficiency increases with age and is associated with poor outcome in the elderly. Objectives. We aimed to investigate the relationship between all-cause mortality and vitamin D deficiency in elderly patients with chronic heart failure. Design. It is a retrospective, observational crosssectional study. Median follow-up time was 497 days. Subjects and Methods. 302 patients aged ≥65 years heart failure patients was categorized into tertiles based on the 25-hydroxy-vitamin D levels. Clinical and laboratory parameters were evaluated according to tertiles. Hospitalization rates and overall survival were compared between tertiles. Independent predictors of all cause mortality were defined. Results. Patients with low vitamin D tertile were mostly women (p=0.001), and had a worse NYHA functional class (p=0.005). During follow-up, deaths were more frequent in the first tertile (p = 0.001). All-cause mortality increased significantly with decreasing vitamin D tertiles (from third tertile 7.9%, to 11.9%, to 26%; log rank test p=0.003). No significant difference was observed at the composite endpoint of mortality or HF hospitalizations (P=0.451). Multivariate analysis supported that low vitamin D concentration was an independent predictor of all causes of mortality (HR 0.93; 95% CI 0.89-0.97; p=0.004). Conclusions. Low vitamin D levels were independent predictors of all-cause mortality in the elderly population with chronic heart failure.
  • Endocrine Care

    Shahid A, Saeed S, Saeed S, Alam R, Butt T, Qazi M, Arslan M

    Evidence of Hypogonadism and its Association with Serum Insulin and Leptin Levels in Male Offspring fo Diabetic Parents

    Acta Endo (Buc) 2011 7(3): 365-372 doi: 10.4183/aeb.2011.365

    Recent studies indicate a relatively high prevalence of hypogonadism with low gonadotropin levels, in adult male patients with type 2 diabetes (T2DM).\r\nObjective.In this study we investigate the possibility of a predisposition to hypogonadism and its relationship with\r\ninsulin resistance and leptin levels in adolescent and young males with one or both diabetic parents.\r\nDesign. It was a cross-sectional study conducted on male subjects between 15-25 y of age.\r\nSubjects & Methods. Groups of subjects with one diabetic parent (n=30) and with both diabetic parents (n=30) were\r\ncompared with an equal number of age matched offspring of healthy non diabetic parents (n=30). Fasting blood glucose,\r\nserum insulin, leptin, FSH, LH and testosterone were measured.\r\nResults. Mean fasting insulin, and insulin resistance as assessed by HOMA-IR, were significantly higher (p<0.05) in offspring of both diabetic parents and mean serum leptin\r\nlevels were significantly higher (p<0.001) in both groups of offspring of diabetic parents compared to that of the control group. Whereas serum testosterone concentrations\r\n(p<0.05) were lower in both groups of offspring with diabetic parents, serum LH was higher (p<0.05) in offspring of both diabetic parents, as compared to control group. Also, serum testosterone levels were shown to be inversely related to serum leptin in subjects with both diabetic parents.\r\nConclusion.The present study suggests evidence of hypoandrogenesis in subjects with a family history of T2DM and the possibility of a direct effect of factors such as\r\nhyperleptinemia and hyperinsulinemia on androgenesis at an early age, independent of changes in pituitary function.
  • Endocrine Care

    Yilmaz BA, Balos Toruner F, Akyel A, Ercin U, Konca Degertekin C, Turhan Iyidir Ö, Tavil Y, Bilgihan A, Arslan M

    Endothelial Dysfunction in Patients with Asymptomatic Primary Hyperparathyroidism

    Acta Endo (Buc) 2015 11(4): 482-488 doi: 10.4183/aeb.2015.482

    Context. Impaired flow mediated dilatation (FMD) and increased carotid intima media thickness (CIMT) are the antecedent forms of atherosclerosis. Objective. The aim of this study was to evaluate vascular structural and functional changes in patients with asymptomatic primary hyperparathyroidism (APHPT), and whether biochemical alterations, related with PHPT and oxidative stress marker serum advanced oxidation protein products (AOPPs), may have influence on vascular alterations. Design. This is a cross sectional clinical study. Subject and Methods: Thirty-four patients with APHPT and 29 sex- and age and cardiovascular risk factors matched control cases were included in this study. Endothelial function was evaluated by FMD of the brachial artery; CIMT was measured by ultrasonography; in addition serum AOPPs and biochemical parameters were determined. Results. Serum Ca levels were higher in the patient group [10.93±0.60mg/dL vs. 9.45±0.31; p<0.001]. FMD measurement was significantly lower in patients group [0.07 (0.01-0.26) % vs. 0.14 (0.04-0.22) %; p=0.01]. CIMT measurements were comparable between the groups [52 (35- 69) mm vs. 56 (38-70) mm; p=0.821]. AOPPs levels were significantly higher in the patients [136.43 (55.14-1352) mmol/L vs. 84 (53.18-595.48) mmol/L; p=0.026]. There were significant negative correlations between FMD and serum Ca (r=–0.339, p<0.001); and serum AOPPs levels (r=–0.275, p<0.005). Serum Ca (p=0.007, β=–0.353) and AOPPs (p=0.024, β=–0.243) levels and hyperlipidemia (p=0.024, β=–0.288) were the predictors of FMD. Conclusions. Vascular endothelial function is impaired in patients with APHPT. Hypercalcemia, increased oxidative stress and hyperlipidemia may have role in the pathogenesis of endothelial dysfunction in patients with APHPT.