Abstract
Ribosomal and ribonucleic acid (RNA)-rich preparations derived from Salmonella typhimurium were examined for their ability to enhance the primary in vitro antibody response of normal mouse spleen cell cultures to sheep erythrocytes. Both of these fractions were consistently more active in elevating the antibody response of normal mouse splenocytes from lipopolysaccharide (LPS) responder mice than was LPS. Furthermore, injection of mice with either the ribosomal or RNA-rich fraction induced antibody response helper factor activity in 2-h post-treatment serum similar to that induced by LPS. Endotoxin low-responding C3H/HeJ mice were stimulated to release helper factors by ribosomes and the RNA extracts but not by LPS. Treatment of the ribosomes and RNA fractions with ribonuclease destroyed their ability to stimulate the production of the helper factor in serum of treated mice. Therefore, it appears likely that ribosomes and RNA-rich fractions stimulated an intermediate helper factor due to the presence of RNA and not LPS.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Angerman C. R., Eisenstein T. K. Comparative efficacy and toxicity of a ribosomal vaccine, acetone-killed cells, lipopolysaccharide, and a live cell vaccine prepared from Salmonella typhhimurium. Infect Immun. 1978 Feb;19(2):575–582. doi: 10.1128/iai.19.2.575-582.1978. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Butler R. C., Nowotny A., Friedman H. Macrophage factors that enhance the antibody response. Ann N Y Acad Sci. 1979;332:564–578. doi: 10.1111/j.1749-6632.1979.tb47151.x. [DOI] [PubMed] [Google Scholar]
- Cunningham A. J., Szenberg A. Further improvements in the plaque technique for detecting single antibody-forming cells. Immunology. 1968 Apr;14(4):599–600. [PMC free article] [PubMed] [Google Scholar]
- Eisenstein T. K., Angerman C. R. Immunity to experimental Salmonella infection: studies on the protective capacity and immunogenicity of lipopolysaccharide, acetone-killed cells, and ribosome-rich extracts of Salmonella typhimurium in C3H/HeJ and CD-1 mice. J Immunol. 1978 Sep;121(3):1010–1014. [PubMed] [Google Scholar]
- Eisenstein T. K. Evidence for O antigens as the antigenic determinants in "ribosomal" vaccines prepared from Salmonella. Infect Immun. 1975 Aug;12(2):364–377. doi: 10.1128/iai.12.2.364-377.1975. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Fogel S., Sypherd P. S. Extraction and isolation of individual ribosomal proteins from Escherichia coli. J Bacteriol. 1968 Aug;96(2):358–364. doi: 10.1128/jb.96.2.358-364.1968. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kamo I., Pan S. H., Friedman H. A simplified procedure for in vitro immunization of dispersed spleen cell cultures. J Immunol Methods. 1976;11(1):55–62. doi: 10.1016/0022-1759(76)90018-1. [DOI] [PubMed] [Google Scholar]
- Watson J., Riblet R. Genetic control of responses to bacterial lipopolysaccharides in mice. II. A gene that influences a membrane component involved in the activation of bone marrow-derived lymphocytes by lipipolysaccharides. J Immunol. 1975 May;114(5):1462–1468. [PubMed] [Google Scholar]