Yazar "Altug, T." seçeneğine göre listele
Listeleniyor 1 - 4 / 4
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Aromatase inhibitors and radiation-induced lung fibrosis(Amer Soc Clinical Oncology, 2008) Bese, N. S.; Altinok, A. Y.; Ozsahin, E. M.; Yildirim, S.; Sut, N.; Altug, T.; Ober, A.[Abstract Not Available]Öğe Aromatase inhibitors decrease radiation-induced lung fibrosis: Results of an experimental study(Churchill Livingstone, 2016) Altinok, A. Y.; Yildirim, S.; Altug, T.; Sut, N.; Ober, A.; Ozsahin, E. M.; Azria, D.Purpose: In experimental and clinical trials, tamoxifen (TAM) has been shown to increase radiation-induced lung fibrosis (RILF). Furthermore, aromatase inhibitors (AI) have been shown to be superior to TAM in the adjuvant setting and preclinical data suggest that letrozole (LET) sensitizes breast cancer cells to ionizing radiation in other studies. In this experimental study, we evaluated whether AI have any impact on the development of RILF in rats. Materials and methods: 60 female wistar-albino rats were divided into 6 groups: Control (group A), RT alone (group B), RT + TAM (group C), RT + anastrozole (ANA group D), RT + LET (group E), and RT + exemestane (EXE, group F). RT consisted of 30 Gy in 10 fractions to both lungs with an anterior field at 2 cm depth. Equivalent doses for 60 kg adult dose per day of TAM, ANA, LET, and EXE were calculated according to the mean weight of rats and orally administrated with a feeding tube. Percentage of lung with fibrosis was quantified with image analysis of histological sections of the lung. The mean score values were calculated for each group. the significance of the differences among groups were calculated using one way ANOVA test and Tukey HSD post-hoc test. Results: Mean values of fibrosis were 1.7, 5.9, 6.7, 2.5, 2 and 2.2 for groups A, B, C, D, E, and F, respectively (p = 0.000). TAM increased RT-induced lung fibrosis but without statistical significance. Groups treated with RT + AI showed significantly less lung fibrosis than groups treated with RT alone or RT + TAM (p = 0.000). RT + AI groups showed nearly similar RT-induced lung fibrosis than control group. Conclusions: In this study, we found that AI decreased RT-induced lung fibrosis to the control group level suggesting protective effect. (C) 2016 Elsevier Ltd. All rights reserved.Öğe The effects of concurrent or sequential administration of trastuzumab on radiation-induced pulmonary fibrosis in rats(Amer Soc Clinical Oncology, 2008) Umay, C.; Bese, N. S.; Serdengecti, S.; Kepil, N.; Karaca, C.; Sut, N.; Altug, T.[Abstract Not Available]Öğe The impact of trastuzumab on radiation-induced pulmonary fibrosis: results of an experimental study(Humana Press Inc, 2010) Bese, N. S.; Umay, C.; Serdengecti, S.; Kepil, N.; Sut, N.; Altug, T.; Ober, A.There are no data regarding the late toxicity of trastuzumab (T) administration with radiotherapy (RT). In this experimental study, we aimed to asses if concurrent or sequential administration of T has any impact for the development of radiation-induced pulmonary fibrosis in rats. Fifty-four female Wistar-albino rats were divided into 6 groups. First group of rats (Group 1; concurrent T) had irradiation to whole thoracic region concurrently with T. Second group (Group 2: sequential T-RT) received thoracic irradiation, 1 week after T. Third group (Group 3: sequential RT-T) had thoracic irradiation first and they had T injection 1 week after RT. Fourth group (Group 4: T only) had only T application. Fifth group (Group 5: RT) had only RT. The last group (Group 6: sham) of rats were observed without any application. A single dose of 12 Gy was given to both lungs with an anterior field at 2 cm depth. T dose which was equivalent to 6 mg/kg adult dose was calculated for each rat, and injected by the tail vein. As an end point the extent of pulmonary fibrosis for each field was graded on a scale from 0 (normal lung or minimal fibrous thickening) to 4 (total fibrous obliteration of the field) at histopathological examination. The mean value of fibrosis scores were 1.44, 1.77, 1.75 and 1.62 for Group 1, 2, 3 and 5, respectively, without any statistically significant differences among them (P > 0.05). The mean value of fibrosis scores for Group 4 and 6 were 0.25 and 0.33, respectively (P > 0.05). When the mean value of fibrosis scores of the groups which had RT with or without T, compared with the observation and the T only groups, the difference was significant (P < 0.05) (one-way ANOVA and Tukey HSD post hoc tests) As a conclusion: addition of T to thoracic irradiation either sequentially or concomitantly did not increase radiation-induced pulmonary fibrosis in rats.
