Abstract

We describe here the utilization of a modified enzyme-linked immunospot assay (ELISPOT) in order to detect an autologous antiidiotypic response in mice at the level of single antibody-forming cells (AFC). Severals assays have been routinely used to detect anti-Id producing cells; however, these approaches often produce contrasting data. We present results obtained with the modified ELISPOT, using as a model system the antiidiotypic response in mice after immunization with a vaccine from Streptococcus pneumoniae R36a, expressing the immunodominant epitope phosphorylcholine (PC). The response to PC is mediated by a large fraction of antibodies bearing the public idiotype T15. Mice of different genetics make up were immunized with a single injection of the vaccine. We observed that one mouse strain (D1.LP) out of three was able to mount a significant anti-T15 response during the primary anti-phosphorylcholine response. BALB/c and C57BL/6 mice did not produce significant levels of anti-T15 antibody following a single injection of the antigen. In contrast, BALB/c mice which were repeatedly stimulated showed a specific anti-Id response. Experimental controls were performed using either specific anti-T15 monoclonal antibodies (mAb) or splenocytes from mice immunized with TEPC15 myeloma protein in complete Freund's adjuvant.

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.