Journal article
A monoclonal antibody defines a geographically conserved surface protein epitope of Babesia equi merozoites
Infection and immunity, Vol.59(7), pp.2412-2417
07/1991
Handle:
https://hdl.handle.net/2376/110127
PMCID: PMC258026
PMID: 1711016
Abstract
Babesiosis is a tick-borne hemoparasitic disease affecting horses worldwide. To investigate mechanisms of immunity to this parasite, the antibody response of infected horses to Babesia equi merozoite proteins was evaluated. Immunoprecipitation of B. equi merozoite antigens with sera from infected horses revealed 11 major proteins of 210, 144, 108, 88, 70, 56, 44, 36, 34, 28, and 25 kDa. Monoclonal antibody (MAb) 36/133.97, which binds to live merozoites, immunoprecipitated proteins of 44, 36, 34, and 28 kDa. When immunoprecipitations were performed with in vitro translation products of merozoite mRNA, MAb 36/133.97 immunoprecipitated proteins of 38, 28, 26, and 23 kDa which comigrated with proteins immunoprecipitated by sera from infected horses at 10(-3) to 10(-4) dilutions. In Western blot analysis, MAb 36/133.97 recognized proteins of 44, 36, 34, and 28 kDa, and a 28-kDa protein was identified by sera from infected horses at a dilution of 10(-4). MAb 36/133.97 bound to B. equi isolates from Florida and Europe. Furthermore, the binding of MAb 36/133.97 to merozoite proteins was inhibited by sera of infected horses from 19 countries. Collectively, these data indicate MAb 36/133.97 binds to a geographically conserved peptide epitope on multiple B. equi merozoite proteins, including a merozoite surface protein, and MAb 36/133.97 reacts with a B. equi protein immunodominant in infected horses.
Metrics
15 Record Views
Details
- Title
- A monoclonal antibody defines a geographically conserved surface protein epitope of Babesia equi merozoites
- Creators
- D P Knowles - Animal Disease Research Unit, U.S. Department of Agriculture, Pullman, Washington 99164-7030L E Perryman - Animal Disease Research Unit, U.S. Department of Agriculture, Pullman, Washington 99164-7030W L Goff - Animal Disease Research Unit, U.S. Department of Agriculture, Pullman, Washington 99164-7030C D Miller - Animal Disease Research Unit, U.S. Department of Agriculture, Pullman, Washington 99164-7030R D Harrington - Animal Disease Research Unit, U.S. Department of Agriculture, Pullman, Washington 99164-7030J R Gorham - Animal Disease Research Unit, U.S. Department of Agriculture, Pullman, Washington 99164-7030
- Publication Details
- Infection and immunity, Vol.59(7), pp.2412-2417
- Academic Unit
- Department of Veterinary Microbiology and Pathology
- Identifiers
- 99900547351401842
- Language
- English
- Resource Type
- Journal article