
1.第二军医大学海军医学研究所 上海 200433
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Ying HE, Junling ZHANG, Yining ZHAO, et al. Protective effect of cimetidine on immune function of mice irradiated by gamma-rays. [J]. Journal of Radiation Research and Radiation Processing 36(2):020203-7(2018)
Ying HE, Junling ZHANG, Yining ZHAO, et al. Protective effect of cimetidine on immune function of mice irradiated by gamma-rays. [J]. Journal of Radiation Research and Radiation Processing 36(2):020203-7(2018) DOI: 10.11889/j.1000-3436.2018.rrj.36.020203.
雄性C57小鼠60只平均分为6组:正常对照组(0 Gy)、模型对照组(1.0 Gy)、阳性药对照组(1.0 Gy+523片)、西咪替丁(Cimetidine,CMD)低、中、高剂量组(1.0 Gy+33.3、1.0 Gy+100、1.0 Gy+300 mg/kg),采用,60,Co γ射线全身照射至吸收剂量1.0 Gy,剂量率为8.33 mGy/min。CMD于照射前连续灌胃给药6 d,每天1次,照射后5 h给药1次。照射后24 h检测脾脏淋巴细胞凋亡率、T淋巴细胞亚群、B淋巴细胞数和血清中IL-2、IL-4、IL-6、IL-12、IFN-γ和TNF-α含量。结果表明:与正常对照组比较,照射后24 h,小鼠脾脏淋巴细胞凋亡率显著增加(,p,<, 0.01),CD3,+,、CD3,+,CD8,+,T细胞和CD3,-,CD19,+,B细胞数量均下降(,p,<, 0.01),血清中的IL-4、IL-12和TNF-α含量显著降低(,p,<, 0.01,,p,<, 0.05);与辐照模型组比较,CMD各剂量组脾脏淋巴细胞凋亡率显著下降(,p,<, 0.01),CMD给药组血清中IL-4、IL-6、IL-12、TNF-α和IFN-γ含量显著增加(,p,<, 0.01,,p,<, 0.05),CMD高剂量组的CD3,+,、CD3,+,CD4,+,和CD3,+,CD8,+,T细胞及CD3,-,CD19,+,B细胞数量均显著上升(,p,<, 0.01,,p,<, 0.05)。结果提示,CMD可有效改善γ射线辐照小鼠的免疫功能,具有较好的辐射保护作用。
Sixty male mice were divided into six groups:normal control group (0 Gy), model control group (1.0 Gy), positive control group (1.0 Gy+523 tablet), and cimetidine groups (1.0 Gy) at the doses of 33.3, 100, and 300 mg/kg, respectively. The mice were irradiated to absorbed dose of 1.0 Gy with ,60,Co γ-rays at 8.33 mGy/min. Cimetidine was administered intragastrically 6 d before irradiation and 5 h after irradiation separately. Twenty-four hours after irradiation, the apoptosis rate of spleen lymphocytes, T lymphocyte subsets, and B lymphocytes in spleen, the content of IL-2, IL-4, IL-6, IL-12, IFN-γ, and TNF-α in serum were detected. Compared with normal control group, the apoptosis rate of spleen lymphocytes increased significantly (,p,<, 0.01). The percentage of CD3,+, CD3,+,CD8,+, T lymphocytes, CD3,−,CD19,+, B lymphocytes, and the content of IL-4, IL-12, and TNF-α in serum decreased significantly (,p,<, 0.01,p,<, 0.05). Compared with model control group, the apoptosis rate of spleen lymphocytes decreased (,p,<, 0.01), while the content of IL-4, IL-6, IL-12, IFN-γ, and TNF-α increased in serum of cimetidine groups (,p,<, 0.01,p,<, 0.05). The percentage of CD3,+, CD3,+,CD4,+, CD3,+,CD8,+, and CD3,−,CD19,+, cells increased in 300 mg/kg cimetidine group (,p,<, 0.01,p,<, 0.05). Cimetidine could improve the immune functions of mice irradiated by γ-rays to 1.0 Gy.
西咪替丁低剂量率电离辐射免疫功能细胞凋亡
CimetidineLow-dose-rate radiationImmune functionApoptosis
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