Author:
Hoffenbach A,Lagrange P H,Bach M A
Abstract
Groups of C57BL/6 mice were infected either intravenously or subcutaneously with 10(5) or 10(8) Mycobacterium lepraemurium cells, and the ability of their splenic macrophages and T-cells to produce, respectively, interleukin 1 on lipopolysaccharide stimulation and interleukin 2 on concanavalin A stimulation was assessed during the course of infection. In all groups of infected mice, interleukin 1 production remained unaffected during the entire observation period, whereas interleukin 2 activity decreased as the infection progressed. Heavily infected mice (10(8) M. lepraemurium cells) showed an earlier and stronger deficiency interleukin 2 production by concanavalin A-stimulated spleen cells than did mice infected with a lower dose (10(5) bacilli), without detectable influence by the route of inoculation. In mice receiving 10(5) bacilli, minor differences were seen according to the route of infection, with a slight delay in interleukin 2 decrease in mice injected intravenously. In subcutaneously inoculated mice, the failure of spleen cells to produce interleukin 2 after concanavalin A stimulation did not correlate with the number of bacilli developing in the spleen, suggesting the existence of suppressor mechanisms acting at a distance from the site of inoculation.
Publisher
American Society for Microbiology
Subject
Infectious Diseases,Immunology,Microbiology,Parasitology
Cited by
12 articles.
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