Publications by authors named "Ozyurt H"

Objective: The purpose of this study was to determine the efficacy and tolerability of hemithoracic radiotherapy implemented with helical tomotherapy (HTT) in malignant pleural mesothelioma (MPM) patients.

Methods: Between October 2018 and December 2020, data from 11 MPM patients who received trimodality therapy, including lung-sparing surgery (pleurectomy-decortication, P/D), adjuvant chemotherapy (cisplatin+ pemetrexed), and radiotherapy, were retrospectively reviewed. HTT was used to deliver a total of 30 Gy, 50-54 Gy or 59.

View Article and Find Full Text PDF

Objective: The purpose of the study was to evaluate the impact of escitalopram co-prescription on plasma anastrozole levels in post-menopausal breast cancer patients.

Methods: A total of 24 post-menopausal operated breast cancer patients co-prescribed with escitalopram and anastrozole were included. Blood samples were collected, before and 1-month after the onset of escitalopram to analyze plasma anastrozole and estradiol levels.

View Article and Find Full Text PDF

Background: Preoperative chemoradiotherapy has long been accepted as a method to improve survival and lifetime quality of rectal cancer patients. However, physiologic effects of these therapies largely depend on the resistance of cells to the radiation, type of chemotherapeutic agents and individual responses. As one of the signaling cascades involved in chemo- or radiation- resistance, the present study focused on several proteins involved in pTEN/Akt/mTOR pathway to explore their prognostic significance.

View Article and Find Full Text PDF

Purpose: Recurrent nasopharyngeal carcinoma (NPC) after previous radiation therapy is a significant problem. This study was to determine the potential benefits from re-irradiation by fractionated stereotactic body radiotherapy (FSRT) on survival benefits and effects of severe late toxicities.

Materials And Methods: Between 2009 and 2018, treatment outcomes were evaluated retrospectively in 26 patients with locally recurrent NPC treated using FSRT with CyberKnife.

View Article and Find Full Text PDF

Miswak (Salvadora persica L.) root extract (SPE) is known for its high antimicrobial and antioxidant activities. In this study, antimicrobial nanocomposites were prepared based on carboxymethyl cellulose (CMC), cellulose nano-fiber (CNF) and SPE.

View Article and Find Full Text PDF

Background: Volumetric shrinkage of normal tissues such as salivary glands, kidneys, hippocampus are observed after radiotherapy. We aimed to assess the alterations in pancreatic volume of patients who received abdominal radiotherapy and define pancreas as an organ at risk for radiation treatment planning.

Material-methods: Forty-nine patients operated for gastric adenocarcinoma who received adjuvant abdominal radiotherapy were in the study group, 27 patients with early stage disease who did not need adjuvant treatment after surgery comprised the control group.

View Article and Find Full Text PDF

Background: Although there have been significant advances for clarifying the pathogenesis of psoriasis, exact pathogenic mechanism of the disease is still unknown. Oxidative stress is considered to be a new etiopathogenetic key factor in the pathogenesis of psoriasis, as a result of the studies performing the association between psoriasis and paraoxonase 1 (PON1) activity. In this study, we aimed to examine the possible associations between the both PON1 L55M and PON1 Q192R polymorphisms and psoriasis susceptibility and disease progression in Turkish population.

View Article and Find Full Text PDF

Background: Our study evaluated long-term survival outcomes in rectal cancer patients treated with preoperative radiotherapy, and the impact on survival of concomitant and postoperative adjuvant chemotherapy (ctx), among other prognostic factors.

Methods: The study included 196 patients [median age: 58 years (range: 20-86 years); 63.0% men] with locally advanced rectal carcinoma and, in some cases, resectable liver metastasis.

View Article and Find Full Text PDF

Objective: Coronary artery disease (CAD) is a multifactorial disease that is caused by various genetics and environmental factors. Genetically, predisposition is an important component for CAD. The candidate apolipoprotein E (apoE) gene is the most studied one.

View Article and Find Full Text PDF

Background: Anemia is a major cause of morbidity in patients with cancer resulting in poor physical performance, prognosis and therapy outcome. The aim of this study is to assess the efficacy of intravenous (iv) iron administration for the correction of anemia, for the prevention of exacerbation of anemia, for decreasing blood transfusion rates, and for the survival of cancer patients.

Methods: Patients with different solid tumor diagnosis who received iv iron during their cancer treatment were evaluated retrospectively.

View Article and Find Full Text PDF

Objective: The role of the oxidative stress in alopecia areata (AA) has been studied by several researchers in a few studies with conflicting results. These results suggested that lipid peroxidation and alterations in the oxidant-antioxidant enzymatic system may play a role in the pathogenesis of AA. Therefore, we aimed to examine the possible associations between the MnSOD Ala-9Val and GPx1 Pro 198 Leu polymorphisms and AA susceptibility and disease progression in Turkish population.

View Article and Find Full Text PDF

Carbonylation is an irreversible modification in oxidized proteins that has been directly related to a number of health disorders including Type 2 diabetes. Dietary antioxidants have been proposed to counteract the oxidative stress occurring under hyperglycemic conditions. An understanding of the nature and consequences of the molecular interactions between phytochemicals and human plasma proteins is of utmost scientific interest.

View Article and Find Full Text PDF

This study evaluated the therapeutic efficacy of heparin and methylprednisolone in the treatment of ischaemic reperfusion (IR) injury of the testis. Twenty-four male Sprague-Dawley rats were allocated equally into three groups of eight animals each. The left testes were rotated 720° for 2 h in the rats in the torsion-detorsion group.

View Article and Find Full Text PDF

Background: Estimation of the postmortem interval (PMI) is one major area of interest in forensic medicine. We investigated changes of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activities and malondialdehyde (MDA) levels in rat brain and renal tissues in the PMI and examined the potential changes which may be useful for an estimation of time of death.

Methods: Forty albino female rats were used in this study.

View Article and Find Full Text PDF

Introduction: The aim of the study was to evaluate the potential association of single gene polymorphisms of the antioxidant enzymes manganese superoxide dismutase (MnSOD) and glutathione peroxidase (GPX1) with prostate cancer (PCa).

Material And Methods: Manganese superoxide dismutase and glutathione peroxidase 1 genotypes and allele frequencies in 49 prostate cancer cases (PCa group) and 98 control subjects were determined. Analysis of genotypes in control group individuals were performed in two subgroups according to serum prostate-specific antigen levels: the control group (n = 49), with prostate specific antigen (PSA) level < 4 ng/ml; and the nonPCa-high PSA control group (n = 49), with serum PSA > 4 ng/ml.

View Article and Find Full Text PDF

In recent years, the studies on the roles of caffeic acid phenethyl ester (CAPE) in several disease models and cell cultures are tremendously growing. It is such a great molecule that was used by ancient times to ameliorate some diseases and nowadays, it is used by modern medicine to test the effectiveness. In this mini-review article, the protection capability of CAPE, as a liposoluble antioxidant and a potent nuclear factor kappa B inhibitor, on oxidative and non-oxidative ovary, and testis damages has been summarized.

View Article and Find Full Text PDF

Background: There is growing recognition for the consequences of rectal cancer treatment to maintain an adequate functional sphincter in the long-term rather than preserving the anal sphincter itself. This study aims to evaluate long-term effects of neoadjuvant chemoradiotherapy (nCRT) followed by sphincter-preserving resection on anal sphincter function in relation to quality of life (QoL) among locally advanced rectal cancer patients.

Methods: Twenty-nine patients treated with nCRT followed by low anterior resection surgery were included in this study.

View Article and Find Full Text PDF

We investigated whether the insertion/deletion (I/D) polymorphism in the angiotensin-converting enzyme (ACE) gene and serum ACE levels are associated with traditional risk factors of coronary artery disease (CAD). We enrolled 250 individuals without CAD and 750 individuals suffering from CAD who were angiographically diagnosed. Biochemical risk factors, the ACE (I/D) gene polymorphism, and ACE serum levels were compared.

View Article and Find Full Text PDF

Background: Telomeres are protective caps consisted of specific tandem repeats (5'-TTAGGG-3'). Shortening of telomeres at each cell division is known as "mitotic clock" of the cells, which renders telomeres as important regulators of lifespan. TRF2 is one of the critical members of shelterin complex, which is a protein complex responsible from the preservation of cap structure, and loss or mutation of TRF2 results in DNA damage, senescence or apoptosis.

View Article and Find Full Text PDF

Aim: To evaluate survival data in patients with gastric cancer in relation to postoperative adjuvant therapy and survival determinants

Methods: A total of 201 patients (mean±SD age: 56.0±11.9 years, 69.

View Article and Find Full Text PDF

Objective: To evaluate the expressions of several apoptotic pathway proteins in relation to clinical parameters and survival in patients with cervical carcinoma.

Methods: A total of 20 patients with clinically advanced staged carcinoma of cervix (International Federation of Gynecology and Obstetrics [FIGO] stage IIB-IVA) aged from 40 to 75 years were included in this study. The expression profile of anti-apoptotic protein (sensitive to apoptosis gene [SAG]), mitochondrial apoptotic proteins (B-cell lymphoma-extra-large [Bcl-xL] and Bcl-2 homologous antagonist/killer [Bak]), and tumor suppressor proteins (p73 and p53) were examined by real-time polymerase chain reaction experiments along with their relation to clinical parameters and survival analyses during follow-up for 5 to 8 years.

View Article and Find Full Text PDF

Objectives: The etiology of schizophrenia is unknown. However, some of the neuropathological changes in schizophrenia may be the result of increased free radical-mediated or reactive oxygen species (ROS) mediated neurotoxicity. Melatonin is a hormone produced especially at night in the pineal gland; additionally is a highly important antioxidant.

View Article and Find Full Text PDF

Ionizing radiation (IR) can induce cell damage and cell death through the reactive oxygen species generated by radiolytic hydrolysis. The present study was aimed to determine the possible protective effects of quercetin, a well-known antioxidant agent, against IR-induced bladder and kidney damage in rats. Sprague-Dawley rats were exposed to 8-Gy whole-abdominal IR and given either vehicle or quercetin (20 mg/kg, ip).

View Article and Find Full Text PDF

The present study aimed to evaluate the effect of pomegranate juice (PJ) on oxidative stress (OS) and sperm concentration in a rat model of testicular torsion-detorsion. A total of 21 Wistar albino rats were randomly divided into three groups, each consisting of seven rats, as follows: i) control group, which underwent sham surgery; ii) ischemia/reperfusion (I/R) group, designed to determine the effects of the testicular torsion-detorsion process on rats; and iii) PJ+I/R group, designed to evaluate the effect of PJ on the OS and sperm cell concentrations induced by the torsion-detorsion process. In the PJ+I/R group, the rats were given 0.

View Article and Find Full Text PDF

It has been previously shown that acetylcholine (ACh) may affect pro-inflammatory and anti-inflammatory cytokines. The role of the cholinergic system in radiation-induced inflammatory responses and tissue damage remains unclear. Therefore, the present study was designed to determine the radio-protective properties of the cholinergic system in the ileum and the liver of rats.

View Article and Find Full Text PDF