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자료유형
학술저널
저자정보
저널정보
대한암학회 Cancer Research and Treatment Cancer Research and Treatment 제47권 제4호
발행연도
2015.1
수록면
921 - 930 (10page)

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Purpose The purpose of this study was to evaluate whether an exogenous epidermal growth factor(EGF) could induce anti-tumor and radiosensitizing effects in vivo. Materials and MethodsBALB/c-nu mice that were inoculated with A431 (human squamous cell carcinoma) cellsin the right hind legs were divided into five groups: I (no treatment), II (EGF for 6 days), III(EGF for 20 days), IV (radiotherapy [RT]), and V (RT plus concomitant EGF). EGF was administeredintraperitoneally (5 mg/kg) once a day and the RT dose was 30 Gy in six fractions. Hematoxylin and eosin (H&E) stained sections of tumor, liver, lung, and kidney tissues wereinvestigated. Additionally, tumors were subjected to immunohistochemistry staining withcaspase-3. ResultsEGF for 6 days decreased tumor volume, but it approached the level of the control group atthe end of follow-up (p=0.550). The duration of tumor shrinkage was prolonged in group Vwhile the slope of tumor re-growth phase was steeper in group IV (p=0.034). EGF for 20days decreased tumor volume until the end of the observation period (p < 0.001). Immunohistochemistryrevealed that mice in group V showed stronger intensity than those in groupIV. There were no abnormal histological findings upon H&E staining of the normal organs. ConclusionEGF-induced anti-tumor effect was ascertained in the xenograft mouse models with A431cells. Concomitant use of EGF has the potential role as a radiosensitizer in the design offractionated irradiation.

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