Publications by authors named "Ozgur Mehtap"

Comparative first-line trials in large B-cell lymphoma (LBCL) have mostly failed over the last decade. Failures were commonly attributed to overestimation of the progression risk for the control arms, bringing the precision of the international prognostic index (IPI) into scrutiny. Simplified molecular IPI (smIPI), introduced at American Society of Hematology 2023, was developed to address the shortcomings of IPI.

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Objective: In this study, we aimed to obtain real-life data on the use of antimyeloma agents, which significantly increase overall survival (OS) in multiple myeloma (MM) patients, in primary plasma cell leukemia (pPCL) patients with poor prognosis.

Materials And Methods: Data from 53 patients who were diagnosed with pPCL between 2011 and 2020 and who used at least one proteasome inhibitor (PI) and/or immunomodulatory (IMID) agent were analyzed retrospectively. Depending on the year of the pPCL diagnosis, 20% leukocytes or ≥2x10/L plasma cells in the peripheral blood was used as a diagnostic criterion.

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Predictive prognostic scoring (PS) systems are not primarily applicable to elderly patients with classical Hodgkin lymphoma (cHL). The objective of this study was to develop a PS system for these patients. The derivation cohort (DC) was utilized for model development, consisting of 97 variables.

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Follicular lymphoma (FL) is the most common subtype of indolent non-Hodgkin lymphoma in Western countries. While FL is generally incurable, standard initial therapies are associated with high response rates and durable remissions for most patients. In addition, novel targeted agents and immunotherapies are changing the treatment algorithm for patients with relapsed or refractory disease.

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Background: Hairy cell leukemia (HCL) is a rare mature B-cell malignancy that is primarily treated with purine analogues. However, relapse remains a significant challenge, prompting the search for alternative therapies. The BRAF V600E mutation prevalent in HCL patients provides a target for treatment with vemurafenib.

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Objective: Calprotectin (CLP), S100A6, and high mobility group nucleosome-binding protein 1 (HMGN1), known as alarmins, are involved in the pathogenesis of many tumors. In this study, we aimed to investigate the relationships of serum CLP, S100A6, and HMGN1 levels with the clinical and laboratory findings of patients with multiple myeloma (MM) and their roles in the pathogenesis of MM.

Materials And Methods: We measured the serum CLP, S100A6, and HMGN1 levels of 55 newly diagnosed patients and 32 healthy controls using the sandwich enzyme-linked immunosorbent assay method.

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Background: Central nervous system (CNS) prophylactic options for diffuse large B-cell lymphoma (DLBCL) are administered differently in most centers. Unfortunately, there is still not a consensus on which patients, which regimen, for how many cycles, and when prophylaxis should be administered. Thus, this remains an unmet clinical need.

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Article Synopsis
  • Glofitamab is a bi-specific antibody used to treat relapsed or refractory B-cell lymphoma, showing potential in a phase II trial, but real-world data is limited.
  • A retrospective study in Turkey analyzed 43 DLBCL patients receiving glofitamab, revealing median overall survival of 8.8 months and a 1-year progression-free survival rate of 83%.
  • While the treatment had promising effectiveness, toxicity was a significant concern, with deaths linked to disease progression and treatment-related side effects like cytokine release syndrome.
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Purpose: The receptor for advanced glycation end products (RAGE) upregulated during the onset and progression of cancer and bone-related pathologies. In this study, we aimed to investigate the role of serum advanced glycation end products (AGEs), soluble RAGE (sRAGE) and high mobility group box 1 (HMGB1), in multiple myeloma (MM).

Methods: AGEs, sRAGE and HMGB1 concentrations of 54 newly diagnosed MM patients and 30 healthy volunteers were measured by ELISA.

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Polatuzumab vedotin (Pola) with bendamustine and rituximab (BR) is a promising option for patients with relapsed/refractory (R/R) diffuse large B-cell lymphoma (DLBCL). We analyzed the data of 71 R/R DLBCL patients who had been treated with Pola-BR in the named patient program from March 2018 to April 2021 from 32 centers in Turkey. All patients received up to six cycles of Pola 1.

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Aim: This study aimed to identify patient characteristics, treatment patterns and outcomes and to evaluate the effects of presence of comorbidities at diagnosis in chronic phase (CP)-chronic myeloid leukemia (CML) patients in Turkey.

Materials & Methods: Hospital records between 2005 and 2018 were retrospectively reviewed.

Results: Of 861 CP-CML patients included, 31% had at least one comorbidity at diagnosis.

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Data about the timing of autologous stem cell transplantation (ASCT) in peripheral T cell lymphoma (PTCL) are conflicting. We aimed to investigate the impact of the sequence of ASCT on the survival outcomes in patients with PTCL. Analyzes were performed retrospectively in a total of 81 patients, 16 of whom underwent upfront ASCT and 12 received salvage ASCT.

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Multiple myeloma is the plasma cell malignancy in which bone involvement is common. The Fibroblast growth factor-23 (FGF-23)/Klotho pathway plays a major role in mineral metabolism that FGF-23 is mineralization inhibitory. Klotho also has anti-apoptotic and anti-tumor effects by acting as a tumor suppressor gene.

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Unlabelled: Purpose: We aimed to evaluate the expression level of programmed death ligand-1 (PD-L1) and its effects on prognosis in acute myeloid leukemia. Methods: The flow cytometry was used to detect PD-L1 expression on leukemic cells of 86 de novo acute myeloid leukemia patients with longitudinal follow-up. Results: Median follow-up was 13 (0-73) months.

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Objective: Peripheral T-cell lymphomas (PTCLs) are an uncommon and quite heterogeneous group of disorders, representing only 10%-15% of all non-Hodgkin lymphomas. Although both molecular and clinical studies have increased in recent years, we still have little knowledge regarding real-life practice with PTCLs. In this study, we aimed to investigate the clinical characteristics and treatment outcomes of a large population-based cohort of patients presenting with systemic non-cutaneous PTCL.

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Introduction: Inherited factor VII (FVII) deficiency (FVIID) is the most common of inherited rare bleeding disorders. Other determinants of clinical severity apart from FVII level (FVIIL) include genetic and environmental factors. We aimed to identify the cut-off FVIILs for general and severe bleedings in patients with FVIID by using an online national registry system including clinical, laboratory, and demographic characteristics of patients.

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The prognosis is poor for relapsed or refractory (R/R) classical Hodgkin Lymphoma (cHL) patients. The brentuximab vedotin (Bv) and bendamustine (B) combination has been used as a preferable salvage regimen in R/R cHL patient trials. We retrospectively evaluated response rates, toxicities, and the survival in R/R cHL patients treated with the BvB combination.

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Objective: This study aimed to retrospectively evaluate the efficacy, safety, and survival outcome of single-agent ibrutinib therapy in chronic lymphocytic leukemia patients.

Materials And Methods: A total of 136 patients (mean age ± standard deviation: 64.6±10.

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Background: Diffuse large B cell lymphoma is the most frequent aggressive non-Hodgkin lymphoma. Predicting response and estimating prognosis earlier makes management of this heterogeneous lymphoma more satisfying. Interim PET response is established in Hodgkin Lymphoma to tailor the therapy but results for non-Hodgkin Lymphoma is unconvincing.

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Article Synopsis
  • Paroxysmal nocturnal hemoglobinuria (PNH) is a complex genetic disorder that can lead to serious complications like blood clots, and recent studies show positive results from a treatment called eculizumab.
  • In a study of 138 PNH patients treated with eculizumab in Turkey from 2008 to 2018, common symptoms included fatigue and hemoglobinuria, with significant improvements in hemoglobin and lactate dehydrogenase levels noted after seven months of therapy.
  • The findings suggest that eculizumab is effective and well-tolerated, with minimal serious adverse events reported among the patients.
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The AETHERA trial reported an increased progression-free survival (PFS) when brentuximab vedotin (BV) was used as maintenance therapy in high-risk Hodgkin lymphoma (HL) after autologous stem cell transplantation (ASCT). Thus, we aimed to determine the impact and safety of BV as maintenance after ASCT in real-world patients. Seventy-five patients with relapsed/refractory HL started on BV consolidation therapy after ASCT due to high risk of relapse, between January 2016 and July 2019, from 25 institutions, were included in the study.

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Objective: Constantly increasing health expenditures lead to the use of generic molecules and generic versions of bortezomib have been used for a long time. The aim of this study is to retrospectively examine the effectiveness, side effects, and reliability of generic bortezomib in newly diagnosed multiple myeloma (MM) patients.

Materials And Methods: The data of 95 patients who received four cycles of bortezomib as first- or second-line therapy in a single center were retrospectively recorded.

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