Publications by authors named "G Ozisik"

Purpose: To compare the peripapillary retinal nerve fiber layer thickness, macular thickness, ganglion cell layer thickness, and inner plexiform layer thickness determined by Optic Coherence Tomography in the patient group diagnosed with a generalized anxiety disorder who did not receive any psychiatric medication with the healthy control group.

Methods: Forty newly diagnosed, drug-free Generalized Anxiety Disorder patients and 43 healthy age- and gender-matched control subjects were included in the study. Macular thickness, ganglion cell layer thickness, inner plexiform layer thickness, and peripapillary retinal nerve fiber layer thickness were measured using optical coherence tomography.

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Background: The metabolic syndrome (MetS) is characterized by a cluster of metabolic factors, including insulin resistance and type-2 diabetes, abdominal obesity, dyslipidemia, hypertension and microalbuminuria. Impaired glucocorticoid receptor (GR) activity also plays an important role in the etiology of MetS. The objective of our study is to evaluate the effects of GR gene polymorphisms (BclI, N363S, TthIII1 and ER22/23EK) in Turkish patients with MetS.

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Purpose: To describe the enhanced depth imaging optical coherence tomography findings in a very young case of Type 1 primary hyperoxaluria.

Methods: Observational case report of a young patient who underwent clinical examination and enhanced depth imaging optical coherence tomography evaluation.

Results: A 4-year-old boy with a history of Type 1 primary hyperoxaluria and resulting chronic renal failure was referred to us for ophthalmologic examination.

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Objective: Mitochondrial DNA (mtDNA) polymorphisms have been implicated in the pathophysiology of human diseases. Among them, a T>C nucleotide transition on the 16189 nucleotide position of mtDNA has been studied in several metabolic diseases including diabetes and obesity. In this study we aimed to investigate the association of this polymorphism among Turkish metabolic syndrome patients.

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Recently, efforts have been focused on mitochondrial DNA changes and their relation to human cancers. Among them, a 4977 bp deletion of mitochondrial DNA, named "common deletion", has been investigated in several types of tumors, with inconsistent results. In this study, we investigated the presence of the common deletion in tissues from 25 breast, 25 colorectal and 50 thyroid tumors and in the adjacent healthy tissues from Turkish patients.

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