A skin-reactive polysaccharide isolated from unheated BCG culture filtrates (GAE) inhibited guinea pig peritoneal exudate cell migration to the same degree as PPD in guinea pigs sensitized 2 to 3 months previously. The hydrolyzed polysaccharide and a second polysaccharide, both skin non-reactive, were inactive in this in vitro model of delayed hypersensitivity. The degree of migration inhibition correlated well with skin test size in recently sensitized (2 to 3 months) animals for both polysaccharide and protein antigens but bore no relationship to serum antibodies. With time, the ability of exudate cells from skin-reactive animals to react in vitro to the polysaccharide antigen disappeared while in vitro reactivity to PPD remained. We conclude that GAE, as well as a number of other polysaccharides, is able to induce and elicit delayed hypersensitivity.
Inhibition of macrophage migration by a skin-reactive polysaccharide from BCG culture filtrates.
H. P. Godfrey,H. Baer,S. Chaparas
Published 1969 in Journal of Immunology
ABSTRACT
PUBLICATION RECORD
- Publication year
1969
- Venue
Journal of Immunology
- Publication date
1969-06-01
- Fields of study
Biology, Medicine
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
CITATION MAP
EXTRACTION MAP
CLAIMS
CONCEPTS
- delayed hypersensitivity
A cell-mediated immune response assessed here by skin testing and in vitro migration inhibition.
Aliases: DTH
- gae
A skin-reactive polysaccharide isolated from unheated BCG culture filtrates and used as the test antigen in the assays.
Aliases: skin-reactive polysaccharide from unheated BCG culture filtrates
- guinea pig peritoneal exudate cell migration
The in vitro movement of peritoneal exudate cells from guinea pigs used as the readout in the migration inhibition assay.
Aliases: migration of guinea pig peritoneal exudate cells
- hydrolyzed polysaccharide
A polysaccharide derivative produced by hydrolysis and tested as an antigen in the migration assay.
- ppd
A protein antigen used as the comparator in migration inhibition and skin test responses.
- second polysaccharide
A second polysaccharide preparation tested alongside GAE in the migration inhibition experiments.
- serum antibodies
Circulating antibody levels measured to compare with the migration inhibition and skin test results.
Aliases: antibody levels in serum
- skin test size
The magnitude of the skin reaction after antigen challenge in sensitized guinea pigs.
Aliases: skin reaction size
REFERENCES
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