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不同剂量X射线诱导体内及体外小鼠巨噬细胞CD14的剂量效应关系

金顺子,单玉兴,刘树铮*   

  1. 吉林大学公共卫生学院放射生物学教研室 卫生部放射生物学重点实验室,吉林 长春 130021
  • 收稿日期:2004-02-23 修回日期:1900-01-01 出版日期:2004-07-28 发布日期:2004-07-28
  • 通讯作者: 刘树铮

Dose-effect relationship between X-rays irradiation in varietyof dose and CD14 expression in mouse macrophagesin vivo and in vitro

JIN Shun-zi, SHAN Yu-xing, LIU Shu-zheng*   

  1. Department of Radiobiology, School of Public Health, Jilin University,MH Radiobiology Research Unit,Changchun 130021, China
  • Received:2004-02-23 Revised:1900-01-01 Online:2004-07-28 Published:2004-07-28
  • Contact: LIU Shu-zheng

摘要: 目的:观察不同剂量X射线照射在体内及体外对小鼠巨噬细胞CD14表达的影响。方法:采用流式细胞术检测巨噬细胞表面CD14阳性细胞数。体内实验选择16 h、体外实验选择4 h,低剂量为0.05~0.20 Gy、高剂量为0.5~6.0 Gy。 结果:整体照射时,低剂量X射线使CD14表达明显增强,而较高剂量X射线(大于2.0 Gy)明显抑制CD14表达;在体外照射时,0.075 Gy和2.000 Gy以内的较高剂量X射线也使CD14表达明显增强,而4.0~6.0 Gy 的剂量使J774A.1细胞的CD14表达明显受到抑制。 结论:低剂量X射线在体内及体外均能诱导小鼠巨噬细胞的CD14表达;小于2.0 Gy时也能增强CD14的表达,而剂量大于2.0 Gy时CD14的表达呈剂量依赖性下降,而且在体外的变化更明显。

关键词: 电离, X线, 巨噬细胞, 抗原, CD14, 流式细胞术

Abstract: Objective To study the dose-effect relationship between X-rays irradiation and CD14 expression in mouse macrophages in vivo and in vitro. Methods The CD14 positive cells from mouse peritoneal macrophages were detected by flow cytometry (FCM) 16 hours after whole body irradiation (WBI) in vivo and from the cell line J774A.1 of mouse macrophages 4 hours after irradiation in vitro with X-rays from 0.05 Gy to 6.00 Gy. Results WBI by low dose X-rays significantly enhanced the CD14 expression in peritoneal macrophages while the doses of 2.0 to 4.0 Gy caused an opposite effect. The X-irradiation in vitro caused a similar dose-effect curve but the suppression of CD14 expression occurred at doses of 4.0 to 6.0 Gy. Conclusion Low dose irradiation can stimulate CD14 expression and high dose irradiation (>2.0 Gy) can suppress its expression both in vivo and in vitro.

Key words: ionizing, X-rays, macrophages, antigens, CD14, flow cytometry

中图分类号: 

  • R811.5