中国寄生虫学与寄生虫病杂志 ›› 2006, Vol. 24 ›› Issue (2): 11-128.

• 实验报道 • 上一篇    下一篇

重组小鼠干扰素-γ对感染弓形虫孕鼠T细胞亚群自然杀伤细胞的影响

骆方军   

  1. 浙江省诸暨市人民医院, 诸暨 311800
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-04-30 发布日期:2006-04-30

Effect of rmu-IFN-γ on the Splenic T Cell Subsets and NK Cellsof Pregnant Mice Infected with Toxoplasma gondii

LUO Fang-jun   

  1. Department of Clinical Laboratory, Zhuji People′s Hospital, Zhuji 311800, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-04-30 Published:2006-04-30

摘要: 目的 探讨重组小鼠γ-干扰素(rmu-IFN-γ)对妊娠期感染弓形虫的小鼠脾脏T细胞亚群和自然杀伤细胞(NK细胞)水平的影响。 方法 20只BALB/c孕鼠随机分为空白对照、感染对照及rmu-IFN-γ治疗组。妊娠第7~9 天孕鼠急性感染弓形虫,rmu-IFN-γ分为2个剂量组(按小鼠体重1 U/g和10 U/g)腹腔注射给药,3 d后每组随机处死5只,取脾细胞,流式细胞术检测T细胞亚群和NK细胞水平。 结果 两种剂量rmu-IFN-γ治疗组CD4+ T细胞水平在妊娠第10、12、14 天高于感染对照组,CD8+ T细胞水平在妊娠第10、14天低于感染对照组,CD4+/CD8+ T细胞比值在妊娠第10、12、14 天高于感染对照组(P<0.05),孕鼠存活时间长于感染对照组。 结论 注射适量rmu-IFN-γ可改善CD4+/CD8+ T细胞比值,促进NK细胞增殖,提高宿主免疫水平。

关键词: 弓形虫, 重组小鼠干扰素-γ, 妊娠, 小鼠, T细胞亚群, 自然杀伤细胞

Abstract: Objective To explore the effect of rmu-IFN-γ on the change of T cell subsets and natural killer cells of pregnant mice infected with T. gondii. Methods Early pregnant mice infected with T. gondii were administered with different doses(1 U/g or 10 U/g) of rmu-IFN-γ for three days before euthanasia. The numbers of splenic CD4+ and CD8+ T cells and natural killer cells were detected by flow cytometry. Results Compared with the infected mice that were not treated, the level of splenic CD4+ T cells in mice administered with two doses of rmu-IFN-γ increased on the day 10, 12, 14 of gestation, while the level of CD8+ T cells decreased on the day 10, 14 of gestation. The ratio of CD4+/CD8+ T cells increased significantly on the day 10, 12, 14 of gestation. Survival days of the two administered groups were longer than those of the infected group. Conclusion A proper dose of rmu-IFN-γ can reverse the decline of the ratio of T cell subsets, improve the proliferation of NK cells, and so increase the level of peripheral cellular immunity of pregnant mice.

Key words: Toxoplasma gondii, rmu-IFN-γ, Mouse, Pregnancy, T cell subsets, Natural killer cell