Complement activation is required for induction of a protective antibody response against West Nile virus infection

Erin Mehlhop, Kevin Whitby, Theodore Oliphant, Anantha Marri, Michael Engle, Michael S. Diamond

Research output: Contribution to journalArticle

113 Scopus citations

Abstract

Infection with West Nile virus (WNV) causes a severe infection of the central nervous system (CNS) with higher levels of morbidity and mortality in the elderly and the immunocompromised. Experiments with mice have begun to define how the innate and adaptive immune responses function to limit infection. Here, we demonstrate that the complement system, a major component of innate immunity, controls WNV infection in vitro primarily in an antibody-dependent manner by neutralizing virus particles in solution and lysing WNV-infected cells. More decisively, mice that genetically lack the third component of complement or complement receptor 1 (CR1) and CR2 developed increased CNS virus burdens and were vulnerable to lethal infection at a low dose of WNV. Both C3-deficient and CR1- and CR2-deflcient mice also had significant deficits in their humoral responses after infection with markedly reduced levels of specific anti-WNV immunoglobulin M (IgM) and IgG. Overall, these results suggest that complement controls WNV infection, in part through its ability to induce a protective antibody response.

Original languageEnglish
Pages (from-to)7466-7477
Number of pages12
JournalJournal of virology
Volume79
Issue number12
DOIs
StatePublished - Jun 1 2005

Fingerprint Dive into the research topics of 'Complement activation is required for induction of a protective antibody response against West Nile virus infection'. Together they form a unique fingerprint.

  • Cite this