Effect of human serum on de-N-acetyl sialic acid epitope expression and antibody activity against N. meningitidis group B.

Vaccine
Becca A FlitterG R Moe

Abstract

Antibody-mediated complement-dependent bactericidal activity (BCA) against Neisseria meningitidis (Nm) is correlated with protection against invasive disease. Recently, we showed that murine antibodies elicited by neuraminic acid-containing polysialic acid (NeuPSA) antigens conferred protection against Nm group B (NmB) strains in an infant rat model of meningococcal bacteremia [Moe GR, Bhandari TS, Flitter BA. Vaccines containing de-N-acetyl sialic acid elicit antibodies protective against neisseria meningitidis groups B and C. J Immunol 2009;182(10):6610-7]. However, NeuPSA antibodies did not mediate BCA against NmB strains in vitro despite the presence of NmB-reactive IgG and IgM. Using monoclonal antibodies (mAbs) SEAM 2 and 3, which are reactive with two distinctive NeuPSA epitopes, and an NmB anticapsular mAb, we show that growth in human serum affects expression of NeuPSA epitopes by NmB and is necessary for evaluating anti-NeuPSA functional activity.

References

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May 6, 2009·The Journal of Immunology : Official Journal of the American Association of Immunologists·Gregory R MoeBecca A Flitter

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Citations

Sep 29, 2011·The Journal of Biological Chemistry·Taizo A NakanoGregory R Moe
Jan 15, 2015·Infection and Immunity·Maike G MüllerGregory R Moe
Aug 9, 2013·The Journal of Immunology : Official Journal of the American Association of Immunologists·Maike G MüllerGregory R Moe
Apr 28, 2021·Glycoconjugate Journal·Francesco BertiRoberto Adamo

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