Publications by authors named "Nilgun Guvener Demirag"

Objective: To evaluate renal impairment in type 2 diabetic patients with normoalbuminuria or microalbuminuria by detection of serum cystatin C and serum and urinary TGF-β levels.

Methods: Cross-sectional study conducted at the Department of Endocrinology in Baskent University School of Medicine. Patients with type 2 diabetes mellitus without known overt diabetic nephropathy were included in the study.

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Objective: Diabetes is a multifactorial disorder posing a great challenge to public health. In this study, we aimed to evaluate the relationship between depression, coping strategies, glycemic control and patient compliance in type 2 diabetic patients.

Methods: Total 110 outpatients (mean (SD) age: 57.

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Introduction: It has been known that vitamin D has some immunomodulatory effects and in autoimmune thyroid diseases, vitamin D deficiency was more prevalent. In this study, our aim was to investigate the relationship between thyroid autoantibodies and vitamin D.

Material And Methods: Group 1 and 2 consisted of 254 and 27 newly diagnosed Hashimoto's thyroiditis (HT) and Graves' disease (GD) cases, respectively; age-matched 124 healthy subjects were enrolled as controls (group 3).

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Objective: We aimed to assess carotid intima media thickness (CIMT) and serum high-sensitivity C-reactive protein (hs-CRP) levels as estimated markers of subclinical atherosclerosis and inflammation in prediabetic patients.

Methodology: One hundred and ten patients were defined as prediabetic and seventy-six subjects (age and sex matched) were assigned as control group in our cross sectional study. Bilateral CIMT measurements and hs-CRP levels were evaluated.

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Objective: To find out the frequency of vitamin D deficiency and its relation with glucose parameters and the incidence of gestational diabetes (GDM).

Methodology: Gestational diabetes was diagnosed with 75 gram oral glucose tolerance test. Forty-four pregnant women diagnosed with GDM and 78 non-GDM pregnant women were enrolled as case and control group, respectively in this descriptive study.

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Although advances in endocrinologic and neuroradiologic research allow easier recognition of pituitary adenomas, giant pituitary tumours are relatively rare. In the literature, the term "giant" is generally used when a pituitary tumour becomes larger than 4 cm in diameter. Cabergoline is a potent and long-acting inhibitor of prolactin secretion, which exhibits high specificity and affinity for dopamine D2 receptor.

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Objective: To investigate the frequency of vitamin D deficiency in relation to demographics, clinical diagnosis, season of measurement and laboratory parameters in adult out-patients.

Design: Descriptive, retrospective study concerning evaluation of the initial 25-hydroxyvitamin D (25(OH)D) levels determined at admission in relation to demographics, clinical diagnosis, season of measurement and laboratory parameters. 25(OH)D levels ,20 ng/ml were classified as deficiency, 20–30 ng/ml as insufficiency and .

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Rosiglitazone often results in weight gain. We hypothesized that rosiglitazone may modulate circulating levels of ghrelin and peptide YY(3-36) and this modulation may be related to weight-gaining effect of this agent. This study was designed as an open-label, randomized, controlled trial of 3-month duration.

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Insulin resistance, which provides a convenient milieu for platelet activation, has been closely associated with atherosclerotic disorders. Although it often accompanies hyperprolactinemia, findings conflict concerning its clinical impact in macroprolactinemia. In order to investigate the relationship between hyperprolactinemia and platelet activation evidenced by ADP-stimulated P-selectin expression on flow cytometry, we studied hyperprolactinemic, macroprolactinemic, and normoprolactinemic subjects.

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Objective: We report a rare case of 49,XXXXY syndrome with autoimmune diabetes (requiring insulin therapy), bilateral cataracts and unilateral glaucoma.

Clinical Presentation And Intervention: A 25-year-old man with mental retardation presented with multiple skeletal abnormalities, polyuria and polydipsia. He had high glucose concentrations, without ketonuria, and hypergonadotropic hypogonadism.

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Objective: To evaluate the plasma asymmetric dimethyl arginine (ADMA) levels and carotid intima-media thickness (IMT) in patients with polycystic ovary syndrome (PCOS).

Design: Prospective study.

Setting: University medical center.

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Objective: Amiodarone-induced thyrotoxicosis (AIT) is usually classified into two types: type 1, in which a high iodine content triggers the autonomous production of thyroid hormone; and type 2, in which destructive thyroiditis causes the release of preformed thyroid hormone. AIT is a difficult management problem that sometimes requires ablative thyroid therapy. The use of radioactive iodine (RAI) therapy in patients with type-1 AIT who had a 24-hour radioactive iodine uptake (RAIU) value of >10% has been previously reported.

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Background: Brain natriuretic peptide (BNP) is secreted from the ventricular myocardium in response to volume expansion and pressure overload. Serum BNP levels are also affected by thyroid function status, which was mostly related to a direct stimulatory effect of thyroid hormones on the secretion of BNP. Although the diagnostic value of BNP in heart failure is undisputed, its value in the presence of the thyroid dysfunction has been recently questioned.

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Objective: To evaluate the short-term effects of Lanreotide Autogel on insulin sensitivity markers among acromegalic patients with pituitary tumors.

Design: Prospective clinical trial with six months of follow-up.

Setting: A tertiary endocrinology clinic.

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The aim of this study was to compare the efficacy of treatment with insulin alone, insulin plus acarbose, insulin plus metformin, or insulin plus rosiglitazone in type 2 diabetic subjects who were previously on insulin monotherapy, and to evaluate the effects of these treatments on cardiovascular risk factors including lipid profile, C-reactive protein (CRP) and fibrinogen. Sixty-six poorly controlled type 2 diabetic patients on insulin monotherapy were involved. They were randomized to insulin alone, insulin plus acarbose, insulin plus metformin, or insulin plus rosiglitazone groups for 6 months period.

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Our aim was to determine the relationship between body fat percentage (BF%) and body mass index (BMI) and to evaluate the validity of World Health Organisation's BMI cut-off values for obesity. Adult out-patients (n=909, 249 men, 660 women), mean age; 40.5 +/- 14.

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Background: Strontium ranelate (SR) is a new antiosteoporotic agent with antiresorptive and bone-forming properties. The exact mechanism by which SR exerts its effects is not clearly understood. Bone resorption requires interaction between osteoblasts and osteoclasts.

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Objectives: Our objectives were to evaluate the effect of rosiglitazone on bone metabolism and to assess the association between changes in bone turnover parameters and plasma cytokine levels in postmenopausal diabetic women.

Design: This was a 12-wk open-label randomized-controlled trial.

Patients Or Other Participants: A total of 56 obese postmenopausal women with newly diagnosed diabetes and 26 nondiabetic healthy controls matched for age and body mass index were included in the study.

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Objective: Fine-needle aspiration biopsy (FNAB) is a mandatory procedure in evaluation of thyroid nodules. However, it is sometimes perceived as a painful procedure by the patients. Efficacy of the needle-free injection of local anesthesia for reducing the pain associated with other cutaneous procedures that involve needle insertion was previously reported.

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Objective: Pain is one of the few drawbacks of fine-needle aspiration biopsy (FNAB) in patients with nodular thyroid disease (NTD). Lidocaine/prilocaine cream, an eutectic mixture of local anaesthetics (EMLA), is a frequently used topical anaesthetic. Despite its well-documented efficacy for the relief of pain associated with other cutaneous procedures that involve needle insertion, the analgesic role of EMLA has not been previously reported in patients with NTD who are undergoing FNAB.

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Recently, the term of "possible" polycystic ovary syndrome (PCOS) has been used for defining cases in which biochemical evaluations are incomplete but clinical phenotypes are suggestive of PCOS. The aim of this study was, by using Rotterdam 2003 criteria, to detect possible PCOS cases and compare their characteristics and insulin sensitivity status with confirmed PCOS subjects. One-hundred-eighteen women who admitted with complaints and symptoms suggesting PCOS were included.

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Many studies have addressed the effects of estrogenic compounds on platelet function. Raloxifene is a selective estrogen receptor modulator (SERM), which is currently used for the treatment of postmenopausal osteoporosis. At present, there are no clinical data about the effects of raloxifene on platelet function.

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Postprandial lipoprotein metabolism is suggested to play a role in the pathogenesis of atherosclerosis. In this study, we investigated postprandial lipemia and its relationship to cardiovascular risk factors in patients with overt and subclinical hypothyroidism. Twenty-nine female patients with TSH levels greater than 5 microIU/mL and 12 euthyroid control female subjects were included in the study.

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Objective: The clinical profile of asymptomatic primary hyperparathyroidism (PHPT) has shifted from a symptomatic disorder toward a more subtle, asymptomatic state. The lack of knowledge about the natural course of asymptomatic PHPT contributes to the controversy regarding the optimal management of these patients. The aim of this study is to evaluate the natural course of calcium and glucose metabolism abnormalities, insulin sensitivity, and bone mineral density (BMD) in subjects with asymptomatic PHPT over 18 months.

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