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논문 기본 정보

자료유형
학술저널
저자정보
Cho, Won Kyung (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine) Shin, Sung-Won (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine) Kim, Shin-Yeong (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine) Hong, Chang-Won (Department of Physiology, Kyungpook National University School of Medicine) Choi, Changhoon (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine) Park, Won (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine) Noh, Jae Myoung (Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine)
저널정보
대한방사선종양학회 Radiation oncology journal : ROJ Radiation oncology journal : ROJ 제34권 제3호
발행연도
2016.1
수록면
223 - 229 (7page)

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Purpose: This study is to investigate the effect of captopril when combined with irradiation. Materials and Methods: 4T1 (mouse mammary carcinoma) cells were injected in the right hind leg of Balb/c mice. Mice were randomized to four groups; control (group 1), captopril-treated (group 2), irradiated (group 3), irradiated and captopril-treated concurrently (group 4). Captopril was administered by intraperitoneal injection (10 mg/kg) daily and irradiation was delivered on the tumor-bearing leg for 15 Gy in 3 fractions. Surface markers of splenic neutrophils (G-MDSCs) and intratumoral neutrophils (tumor-associated neutrophils [TANs]) were assessed using flow cytometry and expression of vascular endothelial growth factor (VEGF) and hypoxia-inducible factor 1 alpha ($HIF-1{\alpha}$) of tumor was evaluated by immunohistochemical (IHC) staining. Results: The mean tumor volumes (${\pm}$standard error) at the 15th day after randomization were $1,382.0({\pm}201.2)mm^3$ (group 1), $559.9({\pm}67.8)mm^3$ (group 3), and $370.5({\pm}48.1)mm^3$ (group 4), respectively. For G-MDSCs, irradiation reversed decreased expression of CD101 from tumor-bearing mice, and additional increase of CD101 expression was induced by captopril administration. Similar tendency was observed in TANs. The expression of tumor-necrosis factor-associated molecules, CD120 and CD137, are increased by irradiation in both G-MDSCs and TANs. Further increment was observed by captopril except CD120 in TANs. For IHC staining, VEGF and $HIF-1{\alpha}$ positivity in tumor cells were decreased when treated with captopril. Conclusion: Captopril is suggested to have additional effect when combined to irradiation in a murine tumor model by modulation of MDSCs and angiogenesis.

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