Publications by authors named "Zeynep Yegin"

Background: Hematopoietic stem cell transplantation (HSCT) is a critical treatment for various hematologic malignancies but can lead to complications, including ototoxicity.

Aim/objectives: This study aims to explore the relationship between patient-specific factors and ototoxicity in adult HSCT patients.

Material And Methods: We conducted a retrospective analysis of 129 adult patients who underwent HSCT between 2003 and 2020.

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  • Study examined the impact of microRNA gene variants miR-155 rs767649 and miR-22 rs8076112 on panic disorder (PD) risk in a Turkish population.
  • Involving 134 PD patients and 140 healthy controls, the research utilized PCR-RFLP for genotyping and assessed PD symptoms with the Panic Disorder Severity Scale (PDSS).
  • Results showed no link between miR-155 and PD risk/severity, but a significant protective effect (80.4%) of the CC genotype of miR-22 against PD was found, suggesting further investigation is needed.
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Background: The coexistence of sepsis and hematological malignancies increases patient vulnerability, revealing the need for precise prognostic markers. This study explores the prognostic significance of lactate levels and clearance in septic patients with hematological malignancies.

Materials And Methods: A retrospective cohort study from January 2016 to December 2019 in a tertiary hematological intensive care unit (ICU) included 167 adults with hematological malignancies and sepsis.

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Background: Magnesium (Mg) is an essential element that is required as a cofactor for many cellular reactions, including immunologic pathways. The aim of this study was to investigate the potential impact of serum Mg levels on allogeneic hematopoietic stem cell transplantation (alloHSCT) outcomes.

Methods: Medical records of 340 alloHSCT recipients (median age: 45 [18-71] years; M/F: 210/130) were reviewed for this retrospective study.

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Kurut is a traditional dry dairy product mostly consumed in Central Asia. In this study, the distribution of the dominant bacteria present in kurut samples (n=84) originated from seven (Chuy, Issyk-Kul, Talas, Naryn, Jalal-Abad, Osh, and Batken) regions in Kyrgyzstan were analyzed with Illumina iSeq100 platform. The dominant phylum detected was Firmicutes followed by Proteobacteria, Actinobacteria, Cyanobacteria/Chloroplast, and Tenericutes.

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  • * A study involving 1439 acute leukemia patients showed that 6% had a prior history of IA before receiving alloSCT, resulting in higher non-relapse mortality (17.3% for those with IA compared to 11.2% for those without), and poorer outcomes in terms of relapse-free and overall survival rates.
  • * Despite the challenges linked to pre-SCT IA, over two-thirds of patients with this condition were alive one
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Autologous stem cell transplantation (ASCT) remains the mainstay of the treatment in newly diagnosed transplant-eligible multiple myeloma (MM) patients. This retrospective study was performed to investigate the potential prognostic markers which may modify transplant course in a total of 256 ASCT recipients [median age: 58 (30-74) years; male/female: 138/118], including pretransplant (PET) and day + 60 (PET) PET/CT assessments and comparative analysis of melphalan (Mel) dose. Better responses with significantly higher complete response/very good partial response rates were achieved in patients who proceeded to transplant within 301 days from diagnosis (p < 0.

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Endoplasmic reticulum (ER) stress-associated chaperones trigger a defense mechanism called as unfolded protein response (UPR) which can manage apoptosis and be determinative in cell fate. Both anticancer drug effects and potential toxicity effects of magnetic resonance imaging (MRI) and computed tomography (CT) contrast agents were aimed to be evaluated. For this purpose, we investigated expression profiles of endoplasmic reticulum stress-associated chaperone molecules in human pancreatic tumor lines BxPC-3 and PANC-1 and control human embryonic kidney cells 293 (HEK293) induced with a variety of gadolinium and iohexol contrast agents.

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Allogeneic hematopoietic stem cell transplantation (alloHCT) is associated with severe complications, most of which share a common physiopathological background characterized by endothelial dysfunction. A novel risk assessment model, endothelial activation and stress index (EASIX), has been introduced as a predictor of endothelial activation. This retrospective study was performed to evaluate the predictive impact of EASIX/modified-EASIX (mEASIX) on transplant outcome.

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  • This study explores the role of inflammation in colon tumor development, particularly focusing on the transcription factor NF-κB and its responsive genes like COX-2, IL-8, and VEGF, which are important for angiogenesis.
  • Researchers analyzed 34 colon carcinoma specimens alongside normal adjacent tissues, examining the gene expression levels using semi-quantitative RT-PCR.
  • Results showed that COX-2, IL-8, and VEGF were significantly upregulated in tumor tissues, suggesting their potential as early biomarkers for colon cancer diagnosis, while MMP-2 and MMP-9 levels remained unchanged.
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  • * In a study of 90 patients, flow cytometry (FCM) showed higher sensitivity (94.2%) compared to cytology (68.5%) for diagnosing CNS involvement, although cytology remains the gold standard.
  • * The findings suggest that FCM could be a valuable routine diagnostic tool alongside cytology, as it can detect smaller numbers of malignant cells more effectively and offers quicker results.
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  • Opportunistic fungal infections like invasive aspergillosis (IA) are a significant health threat for immunocompromised patients, with around 250,000 cases yearly, and early diagnosis and treatment can help lower mortality rates.
  • This study aimed to evaluate the effectiveness of two diagnostic tests—galactomannan and beta-glucan—for diagnosing invasive pulmonary aspergillosis (IPA) in 60 patients at Gazi University Hospital.
  • Results showed that the galactomannan test had a sensitivity of 77.8% and specificity of 96.7%, while the beta-glucan test had a lower sensitivity of 61.1%, highlighting the relevance of risk factors like steroid use in IPA development.
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Introduction: COVID-19 has been associated with high morbidity and mortality in allogeneic hematopoietic stem cell transplant (allo-HCT) recipients.

Methods: This study reports on 986 patients reported to the EBMT registry during the first 29 months of the pandemic.

Results: The median age was 50.

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Background: Patients with hematological malignancies (HM) often require admission to the intensive care unit (ICU) due to organ failure, disease progression or treatment-related complications, and they generally have a poor prognosis. Therefore, understanding the factors affecting ICU mortality in HM patients is important. In this study, we aimed to identify the risk factors for ICU mortality in our critically ill HM patients.

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  • Propolis is a resin-like substance made by honeybees, which was studied by collecting samples from honeybee hives in Eastern Türkiye and analyzing their DNA.
  • Using advanced techniques like next-generation sequencing, researchers found that the bacterial community in propolis was mainly made up of Firmicutes, followed by other groups like Proteobacteria and Actinobacteria.
  • The study highlighted specific bacterial families and species present in propolis, indicating a rich bacterial diversity and suggesting further research to explore its ecological, nutritional, and medicinal benefits.
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Following the introduction of tyrosine kinase inhibitors (TKI), the number of patients undergoing allogeneic hematopoietic cell transplantation (allo-HCT) for chronic phase (CP) chronic myeloid leukemia (CML) has dramatically decreased. Imatinib was the first TKI introduced to the clinical arena, predominantly utilized in the first line setting. In cases of insufficient response, resistance, or intolerance, CML patients can subsequently be treated with either a second or third generation TKI.

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  • Multiple myeloma (MM) is a cancer primarily affecting older adults, and this study focused on assessing the health and functionality of newly diagnosed patients before and after treatment.
  • The study involved 37 patients aged 50 and older, measuring their performance status and conducting a comprehensive geriatric assessment (CGA) at diagnosis and after 4 cycles of induction chemotherapy.
  • Findings indicated that 40.7% of patients showed improvement in performance status post-treatment, with frail patients and those with more health issues experiencing less improvement, suggesting CGA can help predict potential recovery and suitability for future treatments like transplants.
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The imbalanced microbial composition called dysbiosis constitutes a tendency related to different kind of human diseases. To overcome the disadvantages of dysbiosis, the consumption of probiotics is an emerging and promising topic of the last decade. Kefir is a probiotic fermented beverage produced from the fermentation of kefir grains with changing varieties of milk and displays a symbiotic association of bacteria and yeast.

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Purpose: The main aim of the study was to evaluate the potential roles of KRAS/NRAS proto-oncogenes, IL-4 VNTR variants and HPV prevalence in colorectal cancer metastasis. As the second aim, the interactions of the analyzed genes and viral sequences with both clinicopathological variables and each other were targeted.

Methods: DNA was extracted using AmoyDx FFPE DNA Extraction kit from paraffin-embedded colorectal tumor tissue samples (n = 60).

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Poor graft function (PGF) and secondary failure of platelet recovery (SFPR) are significant causes of transplant related morbidity and mortality. Although thrombopoietin receptor agonists (TPO-RA), particularly Eltrombopag (EPAG), have been reported to be efficacious in the treatment of prolonged thrombocytopenia, potential long term adverse effects remain to be elucidated. This retrospective study was performed to determine the efficacy and toxicity profile of TPO-RAs in allogeneic hematopoietic stem cell transplant (alloHCT) recipients.

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  • * A study compared daily versus every other day oral iron supplementation in premenopausal women with IDA, finding significant improvements in hemoglobin and other iron-related measurements in both groups after 2 months.
  • * Although hepcidin levels were slightly higher in the every other day group, there was no significant difference, suggesting that less frequent dosing can improve patient compliance while maintaining similar effectiveness.
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  • Excessive daytime sleepiness (EDS) is a significant issue that can lead to increased accidents and fatalities, and it affects both personal and societal well-being.
  • A study involving 218 participants explored the relationship between specific genetic markers (PER3-VNTR, 5-HTT-LPR, and 5-HTT-VNTR) and EDS, using the Epworth Sleepiness Scale to measure sleepiness levels.
  • Results showed no association between PER3-VNTR and 5-HTT-LPR genotypes with EDS, but a significant connection was found with the 5-HTT-VNTR genotype, where individuals with the 10/10 genotype scored highest on the sleepiness scale
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Graft cellular composition is considered as a significant determinant of transplant outcome. Donor CD3 cells were shown to have a significant association with the development of graft vs host disease (GvHD). The aim of this study was to investigate the impact of graft CD3 cell content on transplant outcome, particularly in terms of GvHD and relapse.

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Objective: Patients with solid malignancies are more vulnerable to severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection than the healthy population. The outcome of SARS-CoV-2 infection in highly immunosuppressed populations, such as in patients with hematological malignancies, is a point of interest. We aimed to analyze the symptoms, complications, intensive care unit admissions, and mortality rates of patients with hematological malignancies infected with SARS-CoV-2 in Turkey.

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Background: Allogeneic hematopoietic stem cell transplantation (allo-HCT) is a curable treatment modality for hematologic disorders. Transplant-related mortality remains high despite prominent scientific and technologic improvements. In consideration with the potential impact of patient- and disease-related factors on transplant outcome, this retrospective study was performed to investigate the predictive role of pretransplant HCT-composite risk (HCT-CR) score in allo-HCT recipients.

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