Person: KARAMAN, ÖZCAN
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Publication Hipoglisemi sendromunun fotopletismografi ve elektriksel deri iletkenliği sinyalleri üzerindeki etkisi(2014-09-25) OKKESİM, ŞÜKRÜ; ÇELİK, GAMZE; İLHAN, MAHMUT MUZAFFER; TAŞAN, ERTUĞRUL; KARAMAN, ÖZCAN; İLHAN, MAHMUT MUZAFFER; KARAMAN, ÖZCANPublication Effects of Weight Loss with Bariatric Surgery on Platelet Count and Volume(2018-07-01) Ilhan, Muzaffer; KARAMAN, ÖZCAN; Yasin, Ayse Irem; TURGUT, SEDA; TAŞAN, ERTUĞRUL; KARAMAN, ÖZCAN; YASİN, AYŞE İREM; TURGUT, SEDA; TAŞAN, ERTUĞRULObjective: Obesity is a chronic metabolic disorder that leads to the increased risk of cardiovascular diseases. This study aims to investigate the effect of weight loss on the platelet count and volume, which is associated with cardiovascular diseases. Methods: In total, 56 obese patients were recruited for the study. The parameters were retrospectively evaluated before and after 6 months of surgery. Results: The mean weight of the patients was 126.2±23.1 kg before surgery and 91.8±20.5 kg after surgery (p<0.001). The mean platelet counts were 292.5±58.6×10³/µL before surgery and 246.8±59.1×10³/µL after surgery (p<0.001). The mean platelet volumes were 10.4±1.0 fL and 11.6±0.9 fL before and after surgery, respectively (p<0.001). The mean platelet counts before surgery were correlated with the mean platelet volume, mean weight, and mean body mass index (p<0.01, r=−0.39, p<0.01, r=0.35, p<0.01, r=0.41, respectively). The mean platelet counts after surgery were correlated with the mean platelet volume (p<0.001, r=−0.68). Conclusion: This study demonstrated decreased platelet counts and increased platelet volume at 6 months after surgery in obese patients. Further long-term and prospective studies are warranted to clarify these results and pathopsychological mechanisms involved.Publication A novel AVP gene mutation in a Turkish family with neurohypophyseal diabetes insipidus(2016-03-01) Ilhan, MAHMUT MUZAFFER; Tiryakioglu, N. O.; KARAMAN, O.; Coskunpinar, E.; YILDIZ, R. S.; TURGUT, SEDA; Tiryakioglu, D.; TOPRAK, HÜSEYİN; TASAN, ERTUĞRUL; İLHAN, MAHMUT MUZAFFER; KARAMAN, ÖZCAN; TURGUT, SEDA; TOPRAK, HÜSEYİN; TAŞAN, ERTUĞRULPurpose Familial neurohypophyseal diabetes insipidus (FNDI) is a rare, autosomal dominant, inherited disorder which is characterized by severe polydipsia and polyuria generally presenting in early childhood. In the present study, we aimed to analyze the AVP gene in a Turkish family with FNDI.Publication Tip 1 Diabetes Mellituslu Obez Olguda Bariyatrik Cerrahinin Etkisi(2017-05-03) YASİN, AYŞE İREM; İLHAN, MAHMUT MUZAFFER; KARAMAN, ÖZCAN; MUTLU, EMİNE; TAŞAN, ERTUĞRUL; İLHAN, MAHMUT MUZAFFER; KARAMAN, ÖZCAN; MUTLU, EMİNE; TAŞAN, ERTUĞRULPublication An Unusual Case of Cushing’s Syndrome: Coexistence of Functional Pituitary and Adrenal Adenoma(2017-04-01) İLHAN, MAHMUT MUZAFFER; KARAMAN, ÖZCAN; YASİN ÇETİN, AYŞE İREM; BÜYÜKBAŞLI, NUR; HAMDARD, JAMSHİD; TAŞAN, ERTUĞRUL; İLHAN, MAHMUT MUZAFFER; KARAMAN, ÖZCAN; TAŞAN, ERTUĞRULA case of adrenocorticotropic hormone (ACTH)-independent Cushing's syndrome, which develops in the course of ACTH-dependent Cushing's disease, is presented in this report. A 47-year-old woman with a past history of surgery and gamma knife radiosurgery because of Cushing's disease was admitted to the endocrinology clinic with weight gain and unregulated blood glucose levels. Hypercortisolemia was still persisting and diagnostic work-up indicated ACTH-independent Cushing's syndrome. Along with the rare possibility of this coexistence, longstanding ACTH hypersecretion can play a role in functional transition of adrenal adenomas. Further studies are needed to clarify the underlying mechanisms.Publication Does DRD2 polymorphism influence the clinical characteristics of prolactinoma?(2015-10-01) Ilhan, MAHMUT MUZAFFER; Kahraman, Ozlem Timirci; Turan, Saime; Turgut, SEDA; Karaman, Ozcan; Zeybek, Umit; SHUKUROV, Samir; Yaylim, Ilhan; Tasan, ERTUĞRUL; İLHAN, MAHMUT MUZAFFER; TURGUT, SEDA; KARAMAN, ÖZCAN; TAŞAN, ERTUĞRULObjectives. - Genetic alterations explaining the clinical variability of prolactinomas still could not be clarified and dopamine D2 receptor (DRD2) polymorphism is a putative candidate for the variable response to dopaminergic treatment. The present study was conducted to investigate the influence of DRD2 TaqI A polymorphism on initial and follow-up characteristics of prolactinoma. Patients and methods. - Seventy-two patients with prolactinoma and 98 age and gender matched control subjects were recruited to the case-control study. Serum prolactin levels were assessed by enzyme-linked immunosorbent assay and DRD2 polymorphism was determined by polymerase chain reaction and restriction length polymorphism analysis. Results. - Decrease of prolactin levels and the tumor shrinkage after cabergoline treatment were 93.9 +/- 5.9% and 58.3 +/- 33.1% in microadenomas and 96.1 +/- 6.1% and 51.7 +/- 29.3 in macroadenomas (P = 0.02 and P > 0.05, respectively). We observed no significant difference for DRD2 genotypes and the alleles between the patients and healthy group (P > 0.05). Prolactin levels before treatment were correlated with tumor diameter before and after treatment and the percentage of prolactin decrease with treatment (P 0.05). Conclusion. - This study revealed that DRD2 TaqI A receptor polymorphism was not associated with the development of prolactinoma and its clinical characteristics. Future studies are needed to clarify the clinical implications of genetic alterations in prolactinoma. (C) 2015 Elsevier Masson SAS. All rights reserved.Publication Investigation of the Vitamin D Receptor Polymorphisms in Acromegaly Patients(2015-01-01) Ilhan, MAHMUT MUZAFFER; TOPTAS-HEKIMOGLU, Bahar; YAYLIM, Ilhan; Turgut, SEDA; TURAN, Saime; Karaman, Ozcan; Tasan, ERTUĞRUL; İLHAN, MAHMUT MUZAFFER; TURGUT, SEDA; KARAMAN, ÖZCAN; TAŞAN, ERTUĞRULObjective. The genetic structural alterations in the majority of somatotroph adenomas are not clarified and the search for novel candidate genes is still a challenge.We aimed to investigate possible associations between vitamin D receptor (VDR) polymorphisms and acromegaly. Design, Patients, and Methods. 52 acromegaly patients (mean age 45.7 ± 1.9 years) and 83 controls (mean age 43.1 ± 2.6 years) were recruited to the study. VDR polymorphism was determined by polymerase chain reaction-based restriction fragment length polymorphism methods. Results. The distribution of VDR genotypes showed a significant difference in the frequencies of VDR FokI genotypes between patients and controls (𝑃 = 0.034). VDR FokI ff genotype was significantly decreased in acromegaly patients (𝑃 = 0.035) and carriers of FokI Ff genotype had a 1.5-fold increased risk for acromegaly (OR: 1.5, 95% CI: 1.07–2.1; 𝑃 = 0.020). IGF1 levels after treatment were significantly higher in patients carrying the Ff genotype compared to carrying ff genotype (𝑃 = 0.0049). 25(OH)D3 levels were significantly lower in acromegaly patients (𝑃 < 0.001). Conclusions. Our study suggests that VDR FokI genotypes might affect the development of acromegaly and VDR polymorphisms may play a role in the course of acromegaly as a consequence of altering hormonal status.Publication Bariatrik Cerrahi Planlanan Morbid Obez Bireylerde Beden Algisi, Benlik Saygisi Ve Cinselhayat Kalitesinin İncelenmesi(2016-05-15) EKİNCİ, ESRA; BIKMAZ, PERVİN SEVDA; EKİNCİ, İSKENDER; TURGUT, SEDA; İLHAN, MAHMUT MUZAFFER; KARAMAN, ÖZCAN; TAŞAN, ERTUĞRUL; İLHAN, MAHMUT MUZAFFER; KARAMAN, ÖZCAN; TAŞAN, ERTUĞRULPublication Hipofizer ve adrenal cushing sendromu birlikteliği(2014-05-21) KARAMAN, ÖZCAN; İLHAN, MAHMUT MUZAFFER; YASİN ÇETİN, AYŞE İREM; HAMDARD, JAMSHID; TAŞAN, ERTUĞRUL; KARAMAN, ÖZCAN; İLHAN, MAHMUT MUZAFFERPublication Bariatrik Cerrahi Planlanan Morbid Obez Bireylerde Beden Algısı, Benlik Saygısı ve Cinsel Hayat Kalitesinin İncelenmesi(2016-05-11) EKİNCİ E.; BIKMAZ P. S.; EKİNCİ İ.; TURGUT S.; İLHAN M. M.; KARAMAN Ö.; TAŞAN E.; EKİNCİ, İSKENDER; KARAMAN, ÖZCAN; TAŞAN, ERTUĞRUL