摘要
本文应用琼脂半固体培养法观察了克隆化的人LAK细胞对骨髓粒单系造血细胞(CFU-GM)增殖的影响。LAK细胞对CFU-GM集落形成有抑制作用:2×10~5/mlLAK细胞与1×10~5/ml骨髓单个核细胞BMMNC预孵育0.5小时可使集落数减少43.8%(P<0.01),LAK与BMMNC预孵育4小时对CFUGM的抑制更为明显,0.5×10~5/ml LAK细胞即可使集落数减少58.8%(P<0.01),随LAK浓度加大抑制效应增强;当LAK与BMMNC在双层培养体系中不接触时,高浓度(4×10~5/ml)亦可表现集落抑制活性。抑制率28.8%(P<0.05)。自体LAK细胞对CFU-GM的抑制效应与异体相比无显著差异(P>0.20)。作者认为LAK细胞对CFU-GM的抑制作用为细胞直接作用与分泌可溶性因子介导的双重效应。
Human LAK cells induced from peripheral blood mononuclear cells with recombinant interleukin2 (rIL-2) incubation, can be cloned in semisolid medium and proliferated well in liquid cultures containing rIL-2. Phynotypie analysis by flow cytometry showed that these cloned LAK cells were T_3(+), T_4(-), T_8(+), Tac(+), DR(+) and NKH1(-)/(+). Cultured with 1×10~5/ml normal bone marrow mononuelear cells (BMMNC)for 0.5-hr prior to semisolid culture system for CFU-GM, the cloned LAK ceils at 2×10~5/ml showed inhibitory effect on CFU-GM that the colonies were decreased by 43.8% of control though 0.5 or 1×10~5/ml LAK cells did not. Morever, a dose-dependent inhibition of CFU-GM was noted when LAK cells pre-inbated with BMMNC for 4-hr in doses of 0.5 -4×10~5/ml that the inhibitory rates of CFU-GM were 58.8, 67.5, 88.8 and 96.3% at0.5, 1, 2, 4×10~5/ml LAK cells addition respectively. Using double-layer agar cultures, inhibitory activity for CFU-GM was also observed only when LAK cells at 4×10~5/ml without contacted with BMMNC. No significant difference of inhibitory effects on CFUGM growth was found between autologous and allogenie clotted LAK cells under same condition. These data suggeste that LAK cells inhibited growth of myeloid progenitor cells without MHC-restriction and the mechanism might involve cell-to-cell interaction and/or some soluble factors secreted by LAK cells.
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
1991年第3期276-280,共5页
Chinese Journal of Pathophysiology
基金
国家自然科学基金
