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Öğe Concurrent chemoradiotherapy with or without low molecular weigth heparin (LWMH) in the treatment of locally avanced non-small cell lung cancer (NSCLC)(Amer Soc Clinical Oncology, 2010) Isikdogan, A.; Kaplan, M. A.; Zincircioglu, S. B.; Cit, M.; Cil, T.; Karadayi, B.; Dirier, A.[Abstract Not Available]Öğe Contribution of low-molecular weight heparin addition to concomitant chemoradiotherapy in the treatment of glioblastoma multiforme(Zerbinis Medical Publ, 2012) Zincircioglu, S. B.; Kaplan, M. A.; Isikdogan, A.; Cil, T.; Karadayi, B.; Dirier, A.; Kucukoner, M.Purpose: Glioblastoma multiforme (GBM) is the most common brain tumor in adults and has a very aggressive course. Median survival is as short as 2 years with standard treatment (chemoradiotherapy followed by adjuvant temozolomide). The purpose of this study was to determine the contribution of low molecular weight heparin (LMWH) addition to concomitant chemoradiotherapy in the treatment of GBM. Methods: All patients with newly diagnosed GBM between March 2004-May 2009 were evaluated. After surgical intervention (total, subtotal resection or only biopsy) all of them were treated with concomitant chemoradiotherapy (2 Gy daily, 5 days a week, 30 fractions, total tumor dose 60 Gy; and 75 mg/m(2) temozolomide, 7 days a week), followed by adjuvant temozolomide (6 cycles, 150-200 mg/m(2), 5 days every 28 days), with or without LMWH (4000 IU/day, 7 days a week, concomitant with radiotherapy) because of risk of thrombosis. The primary endpoint was the determination of progression-free survival (PFS) and overall survival (OS); secondary endpoints were 1- and 2-year OS survival. Results: 30 patients (13 patients in the group non receiving LMWH (LMWH-) and 17 patients in the group receiving LMWH (LMWH+)) were included in the study Median age was 54 years (range 24-75). Median PFS was 57 and 38 weeks in LMWH+ and LMWH- groups, respectively (p=0.068). Median OS was 69 and 44 weeks (p=0.095), 1-year OS survival 84.6 and 41.2% (p=0.016), and 2-year OS survival 38.5 and 5.9% in LMWH+ and LMWH-, respectively (p=0.061). No significant difference was noted between the two groups for grade 3-4 toxicity (p>0.05). Conclusion: Better PFS, OS and 2-year OS survival were obtained in present study with the addition of LMWH to concomitant chemoradiation for GBM but without statistical significance. One-year OS survival was statistically significant favoring the LMWH group. The addition of LMWH did not increase temozolomide toxicityÖğe CONTRIBUTION OF LOW-MOLECULAR WEIGHT HEPARIN ADDITION TO CONCOMITANT CHEMORADIOTHERAPY IN THE TREATMENT OF GLIOBLASTOME MULTIFORME(Oxford Univ Press, 2010) Zincircioglu, S. B.; Kaplan, M. A.; Isikdogan, A.; Cil, T.; Kucukoner, M.; Karadayi, B.; Dirier, A.[Abstract Not Available]Öğe Effects of timing in the applications of radiotherapy after transverse rectus abdominis musculocutaneous flap in rats(Ijrr-Iranian Journal Radiation Res, 2022) Binicier, O.; Caskan, P. K.; Kapi, E.; Bozkurt, M.; Zincircioglu, S. B.; Kulahci, Y.; Selcuk, C. T.Background: The present study aimed to investigate flap status in relation to the timing of radiotherapy (RT) in an experimental rat model of irradiated transverse rectus abdominis musculocutaneous (TRAM) flap. Materials and Methods: Fifty-six adult male Sprague-Dawley experiments were separated in seven groups in terms of flap surgery and RT. The groups comprised sham group, control (Ctrl) group, RT group, and RT plus surgery (RT+Surg) group, which was further separated in four groups depending on the timing of postoperative RT as RT+Surg-10 (RT on postoperative 10th day), RT+Surg-20 (RT on postoperative 20th day), RT+Surg-30 (RT on postoperative 30th day), and RT+Surg-40 (RT on postoperative 40th day). All the rats were sacrificed 8 weeks after the RT administration for histopathological analysis. Results: Compared with the RT+Surg-10 and RT+Surg-20 groups, the hyalinization and collagenization scores in RT+Surg-30 were determined to be significantly lower. Fibrosis scores were lower in the RT+Surg-30 group compared with the RT+Surg-20 group, whereas significantly lower inflammation scores were determined in the RT + Surg-40 group and significantly higher dermal thickness in the RT+Surg-30 group compared with the RT+Surg-10 group. Conclusions: The findings from this model of irradiated flap revealed the significance of the time lag among flap application and postoperative RT for histopathological outcome, emphasized the potential role of at least a 30- to 40day interval between surgery and RT in achieving more favorable flap status.Öğe Investigation of the protective effects of melatonin, amifostine (WR-2721), and N-acetylcysteine on radiotherapy-induced uterine tissue injury in rats(Ijrr-Iranian Journal Radiation Res, 2020) Seker, U.; Aktas, A.; Nergiz, Y.; Zincircioglu, S. B.; Ketani, M. A.Background: The aim of this study was to investigate the protective potency of melatonin, amifostine (WR-2721), and N-acetylcysteine (NAC) when administered intraperitoneally (i.p.) 15 min before 10-Gy single-fraction radiotherapy. Materials and Methods: In this study, 35 female Sprague Dawley rats were divided into five groups of seven rats each. The rats in the control group did not receive any treatments. Rats in the radiotherapy, melatonin, amifostine, and NAC groups underwent abdomino-pelvic irradiation with 10-Gy single fraction gamma (gamma) irradiation. Melatonin 50 mg/kg, amifostine 200 mg/kg, and NAC 500 mg/kg were i.p. administered to the rats 15 min before irradiation. Animals were sacrificed 48 h after irradiation. Uterus samples were collected and, routine histopathological tissue processing was performed. Sections from tissue samples were stained with H&E and analyzed with the terminal deoxynucleotidyl transferase dUTP nick end labelling method (TUNEL assay). Results: Severe morphological degenerations and increases in the apoptotic index (AI) were observed in the radiotherapy group. Tissue protection and AI reduction were observed in the amifostine and NAC groups. Melatonin was more effective than amifostine and NAC. Morphological damage was almost completely repaired, and the AI of the melatonin group was quite similar to that of the control group. Conclusion: This experiment failed to determine a more successful administration technique of amifostine. The protective effects of amifostine and NAC were similar. Melatonin was more successful than these two drugs, and might be an alternative to amifostine when time, dose, or adverse effect constraints are encountered.Öğe Vascular endothelial growth factor (VEGF) level in differential diagnosis of malignant and benign effusion(Amer Soc Clinical Oncology, 2010) Kaplan, M. A.; Isikdogan, A.; Zincircioglu, S. B.; Poyraz, T.; Cil, T.; Kucukoner, M.; Inal, A.[Abstract Not Available]
