巨噬细胞细胞内吞过程中膜受体流动性的测量——两种标记受体…

本文首次实现了细胞内吞过程中膜受体流动性的测量。实验选择巨噬细胞膜和伴刀豆凝集素Ａ（ＣｏｎＡ）。分别用ＣｏｎＡ－Ｂｉｏｔｉｎ＋Ａｖｉｄｉｎ－ＦＩＴＣ（ＡＢＣ法）和ＣｏｎＡ－ＦＩＴＣ（直接法）两种方法标记巨哓细胞膜ＣｏｎＡ受体，比较了这两咱方法标记的巨噬细胞ＣｏｎＡ受体的荧光强度，利用ＦＲＡＰ技术。分别用两种标记方法测量了巨细胞ＣｏｎＡ受体的流动性。结果显示ＣｏｎＡ－Ｂｉｏｔｉｎ＋Ａｖｉｄｉｎ－ＦＩ     

巨噬细胞的白细胞介素（IL—12）研究

1994年3月和1995年5月,在美国召开的两次IL-12专题学术会议指出,细胞因子IL-12有可能广泛用来治疗和预防感染(如血吸虫、疟疾、结核、利什曼原虫和爱滋病)和肿瘤。因而IL-12具有“热门分子”和“魔弹”的美称。1995年7月23—29日,在旧金山举行第九届国际免疫学会上介绍了56篇IL-12研究摘要,进一步地提供了IL-12研究新进展。     

受体介导内吞引起的巨噬细胞胞质酸化和胞吐作用

The effects of Con A, WGA, Zymosan A on macrophage cytosolic pH and outflow of lysosomal content through exocytosis were studied with SNAFL-calcein and FITC-Dextran on ACAS570. The results showed all three ligands could induce macrophage cytosolic acidification in about 10 min and kept at the same level hereafter; outflow of lysosomal fluorescent probe through exocytosis appeared in 15-20 min. In resting conditions, macrophage lysosomes mainly distributed in cell center; after stimulated for 15 min by three ligands, the number of lysosomes increased in membrane periphery, in 25-30 min lysosomes moved back toward cell center. We proposed that ligands induced lysosomal pH rises was a basic factor for outflow of lysosomal content through exocytosis, cytosolic acidification inhibited receptor-mediated endocytosis. Cytosolic acidification and outflow of lysosomal content through exocytosis were the results of cellular self-regulation and self-protection during receptor-mediated endocytosis.     

过继转输的父系抗原耐受T细胞诱导受体母-胎免疫耐受的机制研究

To study the effect of adoptive transfer of paternal antigen-tolerant T cells on recipient reactive T cells, CBA/JxDBA/2 mating was recruited as an abortion-prone model, and CBA/JxBALB/c mating as a successful pregnancy model. The abortion-prone CBA/J females mated with DBA/2 males were injected intraperitoneally with rat anti-mouse CD80 and CD86 mAb or rat isotype IgG at day 4 after gestation (time of implantation). The purified T cells were obtained from spleen of the pregnant CBA/J mice using magnetic beads at day 9 after gestation and labeled with CFSE in vitro. The CFSE-labeled T cells were intravenously injected into other CBA/J females mated with DBA/2 males at day 4 after gestation. The proliferation of recipient splenocytes in response to DBA/2 stimulator cells was evaluated at day 9 after gestation in vitro, and the expressions of intracellular cytokines and costimulatory molecules in CFSE +/- T cells were analyzed by flow cytometry. The results showed that adoptive transfer of either paternal antigen-tolerant T cells or T cells from BALB/c-mated CBA/J mice significantly suppressed the proliferation of recipient splenocytes in response to DBA/2 stimulator cells and resulted in lower frequency of cells positive for IL-2, IFN-gamma, CD28 and higher frequency of IL-10,CTLA-4-producing cells in both CFSE+ CD3+ population and CFSE- CD3+ population compared with adoptive transfer of T cells from isotype IgG-treated CBA/J mice, whereas the frequency of IL-4-producing cells did not appear significant change. Our findings suggest that paternal antigen-tolerant T cells transferred in recipient not only function as antigen-specific suppresser cells but also disable the recipient reactive T cells, which co-suppresses maternal rejection to the allogeneic fetus, thus resulting in the decrease of the embryo resorption rate of the abortion-prone mice to that of the normal pregnancy mice.     

几种细胞因子对HSV—1感染单核巨噬细胞的影响

以ＨＳＶ－１接种人单核细胞系Ｕ９３７和小鼠腹腔巨噬细胞，并在接种前后分别以不同的细胞因子处理，经病毒滴定，免疫荧光试验检测病毒抗原及多聚酶链反应技术检测病毒基因研究了细胞因子对ＨＳＶ－１感染单核巨噬细胞的影响。结果证实，ＴＮＰ－α５０ｕ／ｍＬ，Ｍ－ＣＳＦ２００ｕ／ｍＬ，ＩＦＮ－γ１０００ｕ／ｍＬ，ＩＦＮ－α１０００ｕ／ｍＬ均能增强单核巨噬细胞对ＨＳＶ－１的抗性，加速细胞对ＨＳＶ－１ＤＮＡ的清除，抑     

巨噬细胞集落刺激因子用于治疗感染性疾病的探讨

巨噬细胞集落刺激因子（Ｍ－ＣＳＦ）对机体感染性疾病的发生、发展有重要影响。已经在体内外证实Ｍ－ＣＳＦ对某些细菌、真菌和病毒有抗感染作用，有潜在的临床应用价值；但在某些情况下也能加重某些感染性疾病的病情。     

人粒细胞-巨噬细胞集落刺激因子在烟草种子中的表达

TransgenicResearch 2 0 0 2年 1 0月 1 1卷 5期 5 2 1～ 5 31页报道 :种子不仅是高等植物延续生命的重要材料 ,也是人类食物、药品和工业原料的重要来源。近年来已将不同来源包括人类、细菌和病毒的可利用的基因序列表达于植物 ,也试图利用转基因种子蛋白来生产药物。已知人粒细胞 巨噬细胞集落刺激因子 (GM CSF)在调节白血细胞 (粒细胞和单核细胞 )的生成和功能中可发挥重要作用 ,在抗感染中具有重要的临床意义。还发现GM CSF在化疗、骨髓移植、抗癌和抗艾中也具有多种临床应用。因此 ,目前已有一些国家将重组GM CSF用于临床治疗…