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In Vitro Induction of Nonspecific Resistance in Macrophages by Specifically Sensitized Lymphocytes

机译:巨噬细胞中非特异性抗性的体外诱导特异性淋巴细胞。

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Experiments were carried out to determine whether macrophages can be activated in vitro to resist challenge with heterologous microorganisms. Sensitized spleen cells from guinea pigs chronically infected with Toxoplasma gondii were cultured with normal guinea pig peritoneal macrophages in the presence and absence of Toxoplasma antigen. Macrophage monolayers incubated with sensitized spleen cells and antigen were markedly resistant to challenge from Listeria monocytogenes. Resistance was manifested by prolonged survival of the monolayers and rapid intracellular killing of the bacteria. Macrophages incubated with sensitized spleen cells but in the absence of antigen, as well as macrophages cultured with normal spleen cells, in the presence or absence of antigen, were rapidly destroyed. Sensitized spleen cells responded to the presence of Toxoplasma antigen by increased uptake of tritium-labeled thymidine. Supernatant fluid medium obtained from cultures of macrophages, sensitized spleen cells, and antigen contained a macrophage migration inhibitory factor(s). In addition, these supernatant fluids were capable of inducing increased resistance to Listeria in normal macrophages.
机译:进行实验以确定巨噬细胞是否可以在体外激活以抵抗异源微生物的攻击。在存在和不存在弓形虫抗原的情况下,用正常豚鼠腹膜巨噬细胞培养慢性感染弓形虫的豚鼠的敏感脾细胞。与致敏的脾细胞和抗原一起孵育的巨噬细胞单层对单核细胞增生性李斯特菌的攻击具有明显的抗性。单层的存活时间延长和细菌的快速细胞内杀伤表现出抵抗力。与致敏的脾细胞但不存在抗原一起孵育的巨噬细胞,以及在存在或不存在抗原下用正常脾细胞培养的巨噬细胞均被迅速破坏。敏感的脾细胞通过增加increased标记的胸苷的摄取来响应弓形虫抗原的存在。从巨噬细胞,致敏的脾细胞和抗原的培养物中获得的上清液介质包含巨噬细胞迁移抑制因子。此外,这些上清液能够诱导正常巨噬细胞对 Listeria 的抗性增强。

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