Browsing by Author "Payzin, B"

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    The Effect of FcγRIIIA Gene Polymorphism on the Treatment of Diffuse Large B-cell Non-Hodgkin Lymphoma: A Multicenter Prospective Observational Study
    Büyükkurt, N; Özcan, MA; Ergene, Ü; Payzin, B; Tunah, S; Demirkan, F; Özsan, H; Piskin, Ö; Ündar, B
    Objective: The curative treatment approach for diffuse large B-cell lymphoma (DLBCL) is controversial even in the rituximab (R) era. The aim of this study was to examine the Fc gamma RIIIA gene polymorphism distribution of DLBCL patients who had been treated with R-CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisone) chemotherapy. Furthermore, we investigated the impact of Fc gamma RIIIA gene polymorphism on the overall response rate (ORR) and overall survival (OS). Materials and Methods: Patients from 3 centers in the Aegean region of Turkey who had newly diagnosed CD20-positive DLBCL were enrolled in the study. The single nucleotide polymorphisms of the Fc gamma RIIIA gene were analyzed by real time-PCR. The response to treatment was determined in the middle and at the end of the protocol. During 2 years of follow-up, the patients were clinically and radiologically evaluated for disease status every 3 months. Results: Thirty-six patients were included in the study and the distributions of F/F, V/F, and V/V types of alleles of Fc gamma RIIIA were 25%, 50%, and 25%, respectively. Twenty-seven patients were considered as evaluable according to ORR and OS. The patients' ORR was 87.5%, 100%, and 50% in the F/F, V/F, and V/V allele groups, respectively. We did not establish any statistically significant differences among the 3 alleles groups in respect to ORR (p=0.93). The OS within 2 years in the F/F, V/F, and V/V allele groups was 62.5%, 100%, and 100%, respectively. The OS in the F/F allele group was found to be lower than in the other 2 allele groups (p=0.01). Conclusion: The distribution of gene polymorphisms in our study group was similar to those of previous studies. While ORR was similar between the groups, our results highlight a lower OS in F/F patients compared to other allele groups of Fc gamma RIIIA.
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    A Multicenter Experience of Thrombotic Microangiopathies in Turkey: The Turkish Hematology Research and Education Group (ThREG)-TMA01 Study
    Tekgunduz, E; Yilmaz, M; Erkurt, MA; Kiki, I; Kaya, AH; Kaynar, L; Alacacioglu, I; Cetin, G; Ozarslan, I; Kuku, I; Sincan, G; Salim, O; Namdaroglu, S; Karakus, A; Karakus, V; Pamuk, GE; Altuntas, F; Sari, HI; Ozet, G; Aydogdu, I; Okan, V; Kaya, E; Yildirim, R; Yildizhan, E; Ozgur, G; Ozcebe, OI; Payzin, B; Akpinar, S; Demirkan, F
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    A multicenter experience of thrombotic microangiopathies in Turkey: The Turkish Hematology Research and Education Group (ThREG)-TMA01 study
    Tekgündüz, E; Yilmaz, M; Erkurt, MA; Kiki, I; Kaya, AH; Kaynar, L; Alacacioglu, I; Cetin, G; Ozarslan, I; Kuku, I; Sincan, G; Salim, O; Namdaroglu, S; Karakus, A; Karakus, V; Altuntas, F; Sari, I; Ozet, G; Aydogdu, I; Okan, V; Kaya, E; Yildirim, R; Yildizhan, E; Ozgur, G; Ozcebe, OI; Payzin, B; Akpinar, S; Demirkan, F
    Thrombotic microangiopathies (TMAs) are rare, but life-threatening disorders characterized by microangiopathic hemolytic anemia and thrombocytopenia (MAHAT) associated with multiorgan dysfunction as a result of microvascular thrombosis and tissue ischemia. The differentiation of the etiology is of utmost importance as the pathophysiological basis will dictate the choice of appropriate treatment. We retrospectively evaluated 154 (99 females and 55 males) patients who received therapeutic plasma exchange (TPE) due to a presumptive diagnosis of TMA, who had serum ADAMTSI3 activity/antiADAMTS13 antibody analysis at the time of hospital admission. The median age of the study cohort was 36 (14-84). 67 (43.5%), 32 (20.8%), 27 (17.5%) and 28 (18.2%) patients were diagnosed as thrombotic thrombocytopenic purpura (TTP), infection/complement-associated hemolytic uremic syndrome (IA/CAHUS), secondary TMA and TMA-not otherwise specified (TMA-NOS), respectively. Patients received a median of 18 (1-75) plasma volume exchanges for 14 (153) days. 81 (52.6%) patients received concomitant steroid therapy with TPE. Treatment responses could be evaluated in 137 patients. 90 patients (65.7%) achieved clinical remission following TPE, while 47 (34.3%) patients had non-responsive disease. 25 (18.2%) non-responsive patients died during follow-up. Our study present real-life data on the distribution and follow-up of patients with TMAs who were referred to therapeutic apheresis centers for the application of TPE. (C) 2018 Elsevier Ltd. All rights reserved.