PMID- 14742524 OWN - NLM STAT- MEDLINE DCOM- 20040218 LR - 20210526 IS - 0019-9567 (Print) IS - 1098-5522 (Electronic) IS - 0019-9567 (Linking) VI - 72 IP - 2 DP - 2004 Feb TI - Immunoglobulin E and eosinophil-dependent protective immunity to larval Onchocerca volvulus in mice immunized with irradiated larvae. PG - 810-7 AB - Mice immunized with irradiated Onchocerca volvulus third-stage larvae developed protective immunity. Eosinophil levels were elevated in the parasite microenvironment at the time of larval killing, and measurements of total serum antibody levels revealed an increase in the immunoglobulin E (IgE) level in immunized mice. The goal of the present study was to identify the role of granulocytes and antibodies in the protective immune response to the larval stages of O. volvulus in mice immunized with irradiated larvae. Immunity did not develop in mice if granulocytes, including both neutrophils and eosinophils, were eliminated, nor did it develop if only eosinophils were eliminated. Moreover, larvae were killed in naive interleukin-5 transgenic mice, and the killing coincided with an increase in the number of eosinophils and the eosinophil peroxidase (EPO) level in the animals. To determine if EPO was required for protective immunity, mice that were genetically deficient in EPO were immunized, and there were no differences in the rates of parasite recovery in EPO-deficient mice and wild-type mice. Two mouse strains were used to study B-cell function; micro MT mice lacked all mature B cells, and Xid mice had deficiencies in the B-1 cell population. Immunity did not develop in the micro MT mice but did develop in the Xid mice. Finally, protective immunity was abolished in mice treated to eliminate IgE from the blood. We therefore concluded that IgE and eosinophils are required for adaptive protective immunity to larval O. volvulus in mice. FAU - Abraham, David AU - Abraham D AD - Department of Microbiology and Immunology, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA. David.Abraham@jefferson.edu FAU - Leon, Ofra AU - Leon O FAU - Schnyder-Candrian, Silvia AU - Schnyder-Candrian S FAU - Wang, Chun Chi AU - Wang CC FAU - Galioto, Ann Marie AU - Galioto AM FAU - Kerepesi, Laura A AU - Kerepesi LA FAU - Lee, James J AU - Lee JJ FAU - Lustigman, Sara AU - Lustigman S LA - eng GR - R01 AI047189/AI/NIAID NIH HHS/United States GR - AI 42328/AI/NIAID NIH HHS/United States GR - AI 47189/AI/NIAID NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Infect Immun JT - Infection and immunity JID - 0246127 RN - 0 (Antibodies, Monoclonal) RN - 0 (Interleukin-5) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Animals MH - Antibodies, Monoclonal/therapeutic use MH - B-Lymphocytes/immunology MH - Eosinophils/*immunology MH - Granulocytes/immunology MH - Immunization MH - Immunoglobulin E/*immunology MH - Interleukin-5/physiology MH - Larva/immunology MH - Male MH - Mice MH - Mice, Inbred Strains MH - Onchocerca volvulus/*immunology PMC - PMC321619 EDAT- 2004/01/27 05:00 MHDA- 2004/02/19 05:00 PMCR- 2004/02/01 CRDT- 2004/01/27 05:00 PHST- 2004/01/27 05:00 [pubmed] PHST- 2004/02/19 05:00 [medline] PHST- 2004/01/27 05:00 [entrez] PHST- 2004/02/01 00:00 [pmc-release] AID - 1102 [pii] AID - 10.1128/IAI.72.2.810-817.2004 [doi] PST - ppublish SO - Infect Immun. 2004 Feb;72(2):810-7. doi: 10.1128/IAI.72.2.810-817.2004.