摘要
目的：探讨高压氧暴露对荷Ｓ－１８０肉瘤小鼠免疫功能的影响。方法：１８６只荷Ｓ－１８０肉瘤的ＩＣＲ小鼠被随机分为常压空气（ＮＡ）、高压常氧氮氧（Ｎ＿２－Ｏ＿２）和高压氧（ＨＢＯ）３组；ＮＡ组动物置于舱内常压下；Ｎ＿２－Ｏ＿２组和ＨＢＯ组动物则分别暴露在含１０％氧的高压常氧氮氧混合气和ＨＢＯ环境下，暴露的压力一时程均为２５０ｋＰａ（绝对压）９０分钟，加压速度１００ｋＰａ／ｍｉｎ，采用匀速减压法，１０分钟减压出舱，每日１次；每周连续暴露６天，共暴露２周。另外，还设置了１２只无荷瘤正常小鼠为正常对照（ＮＣ）组。实验中于接种后第１７天对各荷瘤小鼠肉瘤组织中的ＮＫ、ＬＡＫ、ＣＴＬ及腹腔中的巨噬细胞（Ｍ＿Φ）活性分别用４小时￣（５１）Ｃｒ释放法和以Ｌ１２１０为靶细胞的间接ＭＴＴ法进行了检测；同时，观察了小鼠荷瘤的体积、溃破率及动物致死率。结果：与ＮＣ组相比，ＨＢＯ组荷瘤小鼠体内ＮＫ、ＬＡＫ，ＣＴＬ及Ｍ＿Φ活性显著升高（Ｐ＜０．０１）；肿瘤体积明显缩小，荷瘤组织溃破率明显增高（Ｐ＜０．０１）；同时小鼠的存活时间显著延长（Ｐ＜０．０５）。结论：ＨＢＯ暴露可以提高荷Ｓ－１８０肉瘤小鼠体内ＮＫ、ＬＡＫ和ＣＴＬ细胞的活性，增强Ｍ＿?
AimiTo investigate the effect of hyperbaric oxygen(HBO) on antitumor immune com-petence of nuce with S-180 sarcoma. Methods:186 ICR mice with S-180 sarcoma were divided into 3 e-qual groups: normal air(NA)group,normoxic hyperbaric nitrox group and HBO group. The activities of the natural killer(NK), the lymphokine activated killer (LAK),the cytotoxic T lymphocyte(CTL)and the abdominal cavity macrophages(M_Φ)were measured respectively by methods of 4 h release 51Cr and indirect MTT with L1210 as target cell.The volume and ulcerative broke rate of sarcoma and fatality of mice with S-180 sarcoma were also observed.Results:Tbeactivities ofNK,LAK,CTL and M_Φ of mice in the HBO group were significantly higher than those without tumor in the normal control mice,and also the tumor volumes were obviously smaller,the ulcerative broke rate of tumor tissues were ob-viously higher and the survival time of nuce were obviously longer,Conclusion:HBO exposure could raise the activities of NK, LAK and CTL and strengthen the killing rate of M_Φ in mice withS-180 sarco-ma,and these are part of the reasons why the growth of tumor could be inhibited.
