Publications by authors named "Duelger Onur"

Uniform, mesoporous copper(II) oxide nanospindles (CuO NSs) were synthesized via a method based on templated hydrothermal oxidation of copper in the presence of monodisperse poly(glycerol dimethacrylate--methacrylic acid) nanoparticles (poly(GDMA--MAA) NPs). Subsequent decoration of CuO NSs with a CaO nanoshell (CuO@CaO NSs) yielded a nanozyme capable of Cu(I)/Cu(II) redox cycling. Activation of the Cu(I)/Cu(II) cycle by exogenously generated HO from the CaO nanoshell significantly enhanced glutathione (GSH) depletion.

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Medical imaging has an crucial role in modern healthcare and helps diagnosing and treating for a variety of medical conditions. However, the quality of medical images can be affected by factors such as noise, artifacts, and limited resolution. This paper proposes a novel approach for enhancing the reconstruction of medical images by combining Genetic Algorithm (GA) with Incremental Principal Component Analysis (IPCA).

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Background And Objectives: Apraxia is a frequently observed symptom in Alzheimer disease (AD), but the causal pathomechanism underlying this dysfunction is not well understood. Previous studies have demonstrated associations between various cognitive dysfunctions in AD and cortical tau deposition in specific brain areas, suggesting a causal relationship. Thus, we hypothesized that specific regional patterns of tau pathology in praxis-related brain regions may be associated with apraxic deficits in AD.

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  • The study investigates the impact of sarcopenia (muscle loss) and systemic inflammation on the effectiveness of immunotherapy in cancer patients, considering factors like Eastern Cooperative Oncology Group Performance Status (ECOG PS).
  • It involved 100 patients who received immune checkpoint inhibitors, analyzing various systemic inflammation markers to evaluate their relationship with overall survival (OS) and progression-free survival (PFS).
  • Results show that sarcopenia and hypoalbuminemia are significant factors linked to poorer survival outcomes, suggesting that monitoring sarcopenia could potentially improve patient prognoses, although more research is necessary to confirm these findings.
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  • Cyclophosphamide (CP) is an effective anticancer drug but can cause severe toxicity to the liver and other organs, limiting its use.
  • This study aims to investigate the protective effects of selenium (Se) and boron (B) against liver damage caused by CP in experimental rats, comparing their efficacy.
  • Results show that both Se and B can reverse the harmful effects of CP on liver health, with Se providing slightly better protection compared to B.
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Background: Misfolding and aggregation of amyloid β (Aβ), along with neurofibrillary tangles consisting of aggregated Tau species, are pathological hallmarks of Alzheimer's disease (AD) onset and progression. In this study, we hypothesized the clearance of Aβ aggregates from the brain and body into the gut.

Methods: To investigate this, we used surface-based fluorescence intensity distribution analysis (sFIDA) to determine the Aβ aggregate concentrations in feces from 26 AD patients and 31 healthy controls (HC).

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Objective: Disclosing the diagnosis of lung cancer to patients is an issue, especially in the Middle East where cultural factors may prohibit disclosure from being done. The psychosocial consequences of diagnostic awareness and its impact on life expectancy of disclosure are an important issue that may influence this decision. The present study evaluated the effects of diagnostic awareness on psychosocial symptomatology and survival time in advanced lung cancer patients in Turkey.

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Background: Trastuzumab emtansine (T-DM1) is a novel therapy for human epidermal growth factor receptor 2 (HER2)-positive metastatic breast cancer, combining the targeted action of trastuzumab with the cytotoxic effects of emtansine. Although T-DM1 has demonstrated greater efficacy and safety compared to traditional therapies, concerns about hepatotoxicity and spleen-related complications have arisen.

Methods: We conducted a retrospective study of 64 HER2-positive metastatic breast cancer patients treated with T-DM1 at our institution.

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To evaluate the relationship between liver metastasis volume and survival in colorectal cancer patients using the volumetric measurement method. 114 colorectal cancer patients with isolated liver metastases were included in the study. Liver tumor volume, total liver volume were calculated from the patients images at the time of diagnosis.

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Objective: To evaluate the ocular effects of "Bonzai", a synthetic cannabinoid (SC), in seropositive and seronegative users.

Methods: Sixty eyes of 60 consecutive male patients with a history of "Bonzai" use and 30 eyes of 30 age-matched male healthy controls were enrolled in this case-control study. Patients with past "Bonzai" use were grouped as seropositive (n:30) and seronegative (n:30) according to urine toxicology tests.

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Background: The February 6, 2023, twin earthquakes in Türkiye caused significant structural damage and a high number of injuries, particularly affecting the spine, which underscores the importance of understanding the distribution and nature of vertebral injuries in disaster victims.

Aim: To investigate the distribution of radiological findings of vertebral injuries in patients referred to a major tertiary center during the February 6, 2023 twin earthquakes in Türkiye.

Methods: With the approval of the institutional ethics committee, 1216 examinations of 238 patients transferred from the region to a tertiary major hospital after the twin earthquakes of February 6, 2023, were retrospectively analyzed for spine injuries.

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Background: The most prevalent malignancy among women is breast cancer (BC). MicroRNAs (miRNAs) play a role in the initiation and progression of BC by influencing breast cancer stem cells (BCSCs) but the diagnostic and prognostic roles of those miRNAs on BC patients are still unknown. It was aimed to investigate expression profiles, diagnostic and prognostic potentials of BCSC-related miRNAs in different subtypes (Luminal A and B, HER2 + and TNBC) of BC patients.

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  • - Germany's healthcare system faces significant challenges in identifying Alzheimer's disease patients eligible for new amyloid-targeting therapies, with projected wait times up to 50 months for specialist visits and PET scans from 2024 to 2043.
  • - Patients with social health insurance are expected to endure longer wait times compared to those with private insurance, with peak delays reaching 76 months for social insurance patients and 40 months for private insurance patients.
  • - Implementing a blood test as part of the diagnostic process could significantly reduce wait times to under 24 months, highlighting the urgent need for effective triage measures to improve patient access to potentially life-changing treatments.
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  • * A study evaluated levels of essential micronutrients such as vitamin B12, D, iron, and calcium in 364 PPC patients, revealing that 96.9% had at least one deficiency, particularly in iron, calcium, and vitamin D.
  • * The findings suggest that addressing these micronutrient deficiencies is crucial for improving nutritional management and overall treatment for PPC patients.
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Background: To compare the clinicopathological characteristics of nonmetastatic breast cancer patients with and without BRCA variations and to investigate the impact of BRCA variations on prognosis.

Methods: This retrospective single-center study involved an analysis of 938 patients with localized or locally advanced breast cancer who underwent BRCA variation testing. The patients were divided into three groups: 757 were without BRCA variation, 64 were with BRCA1 variation, and 117 were with BRCA2 variation.

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Objective: The goal of our study is to determine the level of Internet addiction (IA) in adolescents by utilizing the IA scale.

Methods: We employed two tools: the IA test (IAT) and the beck depression inventory (BDI), complemented by a sociodemographic information form, to assess IA and depression levels.

Results: A total of 201 participants were included.

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Some people infected with SARS-CoV-2 report persisting symptoms following acute infection. If these persist for over three months, they are classified as post-COVID-19 syndrome (PCS). Although PCS is frequently reported, detailed longitudinal neuropsychological characterization remains scarce.

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Objectives: This study aimed to investigation of the effects of the Cognitive Exercise Therapy Approach (Bilişsel Egzersiz Terapi Yaklaşımı-BETY), a supervised biopsychosocial model-based exercise intervention, on functionality, muscle strength, vascularization, anti-inflammatory and biopsychosocial status in Systemic Sclerosis (SSc) patients.

Methods: Thirty-seven SSc patients were included. Twenty of them were recruited into the study group (SG) undergoing BETY group exercise sessions three times a week for three months and 17 were in the control group (CG) following a home exercise program.

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Serving in the military can have significant impacts on the mental health of veterans and their families. Military personnel can be exposed to a range of physical stressors, psychological trauma, risky lifestyle factors, a regimented military culture, and inadequate support when transitioning out of service. This article reviews research on interventions designed to improve the mental health of Australian military veterans in order to synthesise current knowledge and identify gaps in the literature.

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Purpose: The Reporting and Data System (RADS) has proven successful in various medical settings, but a standardized reporting system for abdominal emergencies is lacking. In this study, the Abdominal Emergency Reporting and Data System (AEM-RADS) for urgent findings on abdominal CT scans is introduced to address the need for consistency in emergency radiology.

Methods: In this prospective observational study, conducted over a six-month period, the urgency of abdominal CT scans was assessed using the proposed AEM-RADS scoring system.

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  • Emergency department (ED) crowding significantly impacts patient care and public health, primarily due to access block, which refers to delays in admitting patients needing hospitalization.
  • The NEDOCS score provides a way to objectively measure the severity of this overcrowding by analyzing various factors such as patient volume and waiting times, revealing that over 81% of the time, the ED was overcrowded.
  • The study found that reducing access block through timely admissions could significantly decrease overcrowding and that factors like boarding times during off-peak hours also play a role in alleviating the issue.
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Background: Driver mutations and immunological expressions have gained importance in recent years for targeted therapies and immunotherapies of nonsmall cell lung cancer (NSCLC).

Aims: This study examined the association between PD-L1 expression and ALK, ROS1, and EGFR driver oncogene mutations in patients with NSCLC.

Materials And Methods: A total of 501 NSCLC patients were included for analysis.

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Aim: Pulmonary Thromboembolism (PTE) occurs as a result of occlusion of one or more of the pulmonary artery branches by thrombus and is an important cause of right heart failure and pulmonary hypertension. Selenoprotein P (SePP) and soluble suppression of tumorigenicity 2 protein (sST2) are two new biomarkers that have previously been the subject of various studies in heart failure. The aim of this study was to determine the diagnostic and prognostic potential of SePP and soluble sST2 levels in patients with acute PTE.

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Background And Objectives: In light of limited intensive care capacities and a lack of accurate prognostic tools to advise caregivers and family members responsibly, this study aims to determine whether automated cerebral CT (CCT) analysis allows prognostication after out-of-hospital cardiac arrest.

Methods: In this monocentric, retrospective cohort study, a supervised machine learning classifier based on an elastic net regularized logistic regression model for gray matter alterations on nonenhanced CCT obtained after cardiac arrest was trained using 10-fold cross-validation and tested on a hold-out sample (random split 75%/25%) for outcome prediction. Following the literature, a favorable outcome was defined as a cerebral performance category of 1-2 and a poor outcome of 3-5.

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