吲哚-3-甲醇对小鼠骨髓造血细胞辐射损伤的防护作用及其机制

目的研究吲哚-3-甲醇(I3C)对小鼠骨髓造血细胞辐射损伤的保护作用及机制。方法(1)密度梯度离心法获得CD45.1亚型C57BL/6J小鼠骨髓有核细胞,经0mol/L、10-8mol/L~10-3mol/LI3C处理后,接受不同剂量(0Gy、1Gy、4Gy)的137Csγ-射线照射;继续培养18h后采用生物发光法检测细胞活力。(2)设空白对照组和10-6mol/LI3C组,经上述3种剂量射线照射后,接种于甲基纤维素半固体培养基中培养7d,观察骨髓粒-单核巨噬细胞集落(CFU-GM)形成情况。(3)取24只CD45.2亚型小鼠接受8Gy137Csγ-射线照射作为受体,CD45.1亚型小鼠骨髓有...

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Published in天津医药 Vol. 45; no. 2; pp. 155 - 159
Main Author 路璐;董佳丽;樊赛军
Format Journal Article
LanguageChinese
Published 中国医学科学院北京协和医学院放射医学研究所,天津市放射医学与分子核医学重点实验室 邮编,300192 2017
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Summary:目的研究吲哚-3-甲醇(I3C)对小鼠骨髓造血细胞辐射损伤的保护作用及机制。方法(1)密度梯度离心法获得CD45.1亚型C57BL/6J小鼠骨髓有核细胞,经0mol/L、10-8mol/L~10-3mol/LI3C处理后,接受不同剂量(0Gy、1Gy、4Gy)的137Csγ-射线照射;继续培养18h后采用生物发光法检测细胞活力。(2)设空白对照组和10-6mol/LI3C组,经上述3种剂量射线照射后,接种于甲基纤维素半固体培养基中培养7d,观察骨髓粒-单核巨噬细胞集落(CFU-GM)形成情况。(3)取24只CD45.2亚型小鼠接受8Gy137Csγ-射线照射作为受体,CD45.1亚型小鼠骨髓有核细胞(供体)设空白对照组、4Gy照射组和4Gy照射+10-6mol/LI3C组。将供体与竞争者(CD45.2亚型)骨髓细胞混和后,接种于受体小鼠体内(每组8只),流式细胞术检测受体小鼠外周血细胞中供体来源的细胞比例。(4)细胞设空白对照组、10-6mol/LI3C组、1Gy照射组和1Gy照射+10-6mol/LI3C组。培养24h后收集细胞,提取蛋白后Westernblot法检测各组核因子NF-E2相关因子(Nrf2)、血红素加氧酶(HO)-1表达。结果(1)I3C浓度>10-4mol/L时出现明显的细胞毒性作用(P>0.05);相同剂量射线照射下,10-7~10-6mol/LI3C可减轻射线对细胞的损伤;因此选取10-6mol/L为本研究I3C的实验浓度。(2)相同剂量射线照射下,10-6mol/LI3C组CFU-GM形成数量较空白对照组明显升高(P<0.05)。(3)流式细胞结果显示,4Gy照射组细胞移植后,受体小鼠外周血中供体细胞比例较对照组明显降低(P<0.05),而10-6mol/LI3C预处理的供体小鼠细胞移植后,受体小鼠中供体细胞比例较4Gy照射组升高(P<0.05)。(4)Westernblot结果显示,1Gy照射+10-6mol/LI3C组Nrf2和HO-1蛋白表达水平明显高于其他3组(P<0.05)。结论I3C可以减轻辐射引起的小鼠造血细胞损伤和功能下降,其机制可能与激活Nrf2/HO-1通路有关。
Bibliography:myeloid progenitor cells; radiation injuries; radiation protection; hematopoietic stem cells; hematopoietic progenitor cells; indole-3-carbinol
Objective To investigate the protective effect of indole-3-carbinol(I3C)on radiation-induced mousebone marrow hematopoietic cell injury and the involved mechanisms.Methods(1)The bone marrow nuclear cells(BMNCs)from CD45.1subtype of C57BL/6J mice were collected by a density gradient centrifugation method.The BMNCswere pretreated with a series doses of I3C(0mol/L,10-8mol/L-10-3mol/L)and then exposed with radiation of137Csγ-ray(doses of irradiation were0Gy,1Gy and4Gy).After18-hour culturing,the bioluminescence method was used to detect thecell viability.(2)These cells were divided into control group and10-6mol/L I3C group.Both groups were received theirradiation(0Gy,1Gy and4Gy)and inoculated into the methylcellulose semi-solid culture medium to incubate7days,thecolony forming unit-granulocyte monocytes(CFU-GM)were observed.(3)Twenty-four CD45.2subtype mice used as the rec
ISSN:0253-9896
DOI:10.11958/20161281