Yazar "Şendur, Mehmet Ali Nahit" seçeneğine göre listele

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    Atezolizumab in patients with metastatic urothelial carcinoma who have progressed after first-line chemotherapy: Results of real-life experiences
    (Elsevier, 2021) Tural, Deniz; Ölmez, Ömer Fatih; Sümbül, Ahmet Taner; Artaç, Mehmet; Özhan, Nail; Akar, Emre; Çakar, Burcu; Köstek, Osman; Ekenel, Meltem; Erman, Mustafa; Coşkun, Hasan Şenol; Selçukbiricik, Fatih; Keskin, Özge; Türköz, Fatma Paksoy; Oruç, Kerem; Bayram, Selami; Yılmaz, Uğur; Bilgetekin, İrem; Yıldız, Birol; Şendur, Mehmet Ali Nahit; Paksoy, Nail; Dirican, Ahmet; Erdem, Dilek; Selam, Meltem; Tanrıverdi, Özgür; Paydaş, Semra; Urakçı, Zuhat; Atağ, Elif; Güncan, Sabri; Ürün, Yüksel; Alkan, Ali; Kaya, Ali Osman; Özyükseler, Deniz Tataroğlu; Taşkaynatan, Halil; Yıldırım, Mustafa; Sönmez, Müge; Başoğlu, Tuğba; Gündüz, Şeyda; Kılıçkap, Saadettin
    Background: Atezolizumab (ATZ) has demonstrated antitumor activity and manageable safety in previous studies in patients with locally advanced or metastatic platinum resistant urothelial carcinoma. Objective: To compare the real-life experience and data of clinical trials on ATZ treatment in metastatic urothelial carcinoma. Design, setting, and participants: Patients with urothelial cancer treated with ATZ after progression on first-line chemotherapy from an expanded access program were retrospectively studied. Data of patients were obtained from their files and hospital records. Safety was evaluated for patients treated with at least one cycle of ATZ. Outcome measurements and statistical analysis: The primary endpoint was objective response rate (ORR). The secondary endpoints are overall survival (OS), progression-free survival (PFS), duration of response, and safety profile of patients. Kaplan-Meier methods were used to calculate median follow-up and estimate PFS and OS. Results and limitations: Data of 115 enrolled patients were analyzed. Most of the patients (92.3%, n = 106) had received chemotherapy regimen only once prior to ATZ. The median follow-up duration was 23.5 mo. The complete response rate, partial response rate, and ORR were 8.7% (n = 10), 20.0% (n = 23), and 28.7% (n = 33), respectively. The median duration of response was 20.4 mo (95% confidence interval [CI], 6.47-28.8). Of the 33 patients who responded to treatment, 60% (n = 20) had an ongoing response at the time of the analysis. PFS and OS with ATZ were 3.8 mo (95% CI, 2.25-5.49) and 9.8 mo (95% CI, 6.7-12.9), respectively. All-cause and any-grade adverse events were observed in 113 (98%) patients. Of the patients, 64% experienced a treatment-related adverse event of any grade and 24 (21.2%) had a grade 3-4 treatment-related adverse event. Limitations of the study included its retrospective design, and determination of treat-ment response based on clinical notes and local radiographic studies. Conclusions: In these real-life data, ATZ was effective and well tolerated in patients with metastatic urothelial carcinoma who have progressed with platinum-based first-line chemotherapy. ATZ is an effective and tolerable treatment for patients with locally advanced or metastatic platinum-resistant urothelial carcinoma in our study, similar to previously reported trials. Patient summary: Atezolizumab is effective and well-tolerated in patients with meta-static urothelial cancer who progressed with first-line chemotherapy, consistent with the outcomes of the previous clinical trials in this setting. (c) 2020 European Association of Urology. Published by Elsevier B.V. All rights reserved.
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    Clinical outcomes of concomitant use of proton pump inhibitors and regorafenib in patients with metastatic colorectal cancer: a multicenter study
    (Springer Science and Business Media Deutschland GmbH, 2022) Yekedüz, Emre; Özbay, Mehmet Fatih; Çağlayan, Dilek; Yıldırım, Atila; Erol, Cihan; Yıldırım, Hasan Çağrı; Tunç, Sezai; Özyurt, Neslihan; Özdemir, Feyyaz; Şendur, Mehmet Ali Nahit; Işıkdoğan, Abdurrahman; Kılıçkap, Saadettin
    Aim: To compare survival outcomes, response rates, and adverse events (AEs) in proton pump inhibitor (PPI) user and non-user patients with metastatic colorectal cancer (mCRC) treated with regorafenib. Methods: We included 272 patients with mCRC treated with regorafenib in this study. Patients were divided into two categories according to their status of PPI use. The primary endpoint was overall survival (OS). The secondary endpoints were time to treatment failure (TTF), response rates, and safety. To exclude immortal time bias in survival analyses, we compared PPI non-user patients and all patients. Results: There were 141 and 131 patients in the PPI non-user and user groups. Baseline characteristics were similar in each group. Pantoprazole was the most used PPI. At the median 35.2 (95% confidence interval (CI): 32.6–37.9) months follow-up, the median OS was similar in PPI non-user and all patients (6.9 months (95% CI: 5.3–8.5) and 7.7 months (95% CI:6.6–8.8), p = 0.913). TTF was also similar in PPI non-user and all patients (3.3 months (95% CI: 2.7–3.9) and 3.5 months (95% CI: 3.0–4.0), p = 0.661). In multivariable analysis, no statistically significant difference was observed between PPI user and non-user groups in OS and TTF (hazard ratio (HR), 0.99; 95% CI, 0.77–1.28; p = 0.963 for OS; HR, 0.93; 0.77–1.20, p = 0.598 for TTF). The objective response rates (ORR) were similar in the PPI non-user and user groups (19.8% and 16.8%, p = 0.455). The rates of any grade AEs were also similar in each group. Conclusion: This study found no worse outcome in the combined use of PPI and regorafenib among patients with mCRC.
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    The comparison of FOLFOX regimens with different doses of 5-FU for the adjuvant treatment of colorectal cancer: a multicenter study
    (Springer, 2021) Akdeniz, Nadiye; Kaplan, Muhammet Ali; Uncu, Doğan; İnanç, Mevlüde; Kaya, Serap; Dane, Faysal; Küçüköner, Mehmet; Demirci, Ayşe; Bilici, Mehmet; Durnalı, Ayse Gök; Koral, Lokman; Şendur, Mehmet Ali Nahit; Erol, Cihan; Türkmen, Esma; Ölmez, Ömer Fatih; Açıkgöz, Özgür; Laçin, Şahin; Şahinli, Hayriye; Urakçı, Zuhat; Işıkdoğan, Abdurrahman
    Purpose We aim to compare the efficiency and toxicity of three different 5-fluorouracil (5-FU) administration types in 5-FU, leucovorin, and oxaliplatin (FOLFOX) combination treatment for adjuvant therapy in colorectal cancer (CRC). Methods Five hundred and seventy patients with stage III colorectal carcinoma who received different FOLFOX regimens after curative resection were included. Patients were divided into three groups as FOLFOX-4, modified FOLFOX-6 (mFOLFOX-6), and mFOLFOX-4 for comparison of toxicity and disease-free survival (DFS) and overall survival (OS) times. Results Three-year DFS rates for FOLFOX-4, mFOLFOX-6, and mFOLFOX-4 groups were 65%, 72%, and 72%, respectively. Five-year OS rates for FOLFOX-4, mFOLFOX-6, and mFOLFOX-4 groups were 69%, 75%, and 67%, respectively. There was no statistically significant difference between the three treatment groups in terms of DFS and OS (p = 0.079, and p = 0.147, respectively). Among grade 1-2 adverse events (AE), thrombocytopenia, neuropathy, and stomatitis were more common in the mFOLFOX-6-treated group. The frequency of grade 1-2 nausea and vomiting were similar in mFOLFOX-6 (36.3% and 24%, respectively) and mFOLFOX-4 (32.4% and 24.7%, respectively) groups but were higher than that in the FOLFOX-4 (19.5% and 11.3%, respectively) group. Among the most common grade 3-4 AE, neutropenia (53.4%, 9%, and 13.5%, respectively) and diarrhea (10.5%, 2.2%, and 2.4, respectively) were more common in FOLFOX-4. The rate of anemia and febrile neutropenia was similar in treatment groups (p = 0.063, and p = 0.210, respectively). Conclusion In the adjuvant treatment of stage III CRC patients, three different 5-FU administration types in FOLFOX combination treatment can be used with similar efficiency and manageable toxicity.
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    Established and new treatment roadmaps for pleural mesothelioma: opinions of the Turkish Collaborative Group
    (Elsevier Inc., 2023) Kaplan, Muhammet Ali; Şendur, Mehmet Ali Nahit; Cangır, Ayten Kayı; Fırat, Pınar; Erdem, Göker; Kılıçkap, Saadettin; Oyan, Başak
    Pleural mesothelioma (PM) is a cancer of the pleural surface, which is aggressive and may be rapidly fatal. PM is a rare cancer worldwide, but is a relatively common disease in Turkey. Asbestos exposure is the main risk factor and the most common underlying cause of the disease. There have been significant improvements in diagnoses and treatments of many malignancies; however, there are still therapeutic challenges in PM. In this review, we aimed to increase the awareness of health care professionals, oncologists, and pulmonologists by underlining the unmet needs of patients with PM and by emphasizing the need for a multidisciplinary treatment and management of PM. After reviewing the general information about PM, we further discuss the treatment options for patients with PM using immunotherapy and offer evidence for improvements in the clinical outcomes of these patients because of these newer treatment modalities.