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Fasciola hepatica: development of monoclonal antibodies against somatic antigens and their characterization by ultrastructural localization of antibody binding

Published online by Cambridge University Press:  05 June 2009

R. E. B. Hanna ,
A. G. Trudgett  and
A. Anderson
R. E. B. Hanna
Affiliation:
Department of Zoology and Department of Microbiology and Immunobiology, Queen's University, Belfast, Northern Ireland
A. G. Trudgett
Affiliation:
Department of Zoology and Department of Microbiology and Immunobiology, Queen's University, Belfast, Northern Ireland
A. Anderson
Affiliation:
Department of Zoology and Department of Microbiology and Immunobiology, Queen's University, Belfast, Northern Ireland
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Abstract

A series of monoclonal antibodies was prepared against tegumental and internal antigens of Fasciola hepatica by immunizing mice with whole adult-fluke homogenates prior to harvesting the splenic lymphocytes for fusion. Preliminary screening by the Indirect Fluorescent Antibody technique indicated the occurrence of discrete groups of monoclonals differing from one another in tissue-specificity but within which IFA labelling patterns were fairly consistent. Representative hybridomas for 5 of these groups were stabilized and used to produce ascites fluid in mice. By application of an immunogold labelling technique it was possible to map the distribution of antigens for which each monoclonal antibody had affinity throughout the tissues of 4-week and 12-week flukes. Several monoclonals specifically labelled antigenic determinants on the important tegumental antigen T1. However the distribution of gold colloid labelling suggested that epitopes other than that normally exposed to the infected host were recognized; and several monoclonals specifically attached to T1 antigen in the tegument of juvenile worms only. The glycocalyx of the gut and excretory system of flukes shared T1 antigenicity with the tegument. Monoclonal antibodies were produced against an internal immunogen associated with ribosomes and heterochromatin in active protein-producing cells, and against interstitial material of adult flukes. Monoclonals against antigens in parenchymal cell cytoplasm and in mature vitelline cells were recognized but the corresponding hybridomas were not stabilized.

Keywords

Fasciola hepaticamonoclonal antibodiesimmunogold labelling
Type
Research Papers
Information
Journal of Helminthology , Volume 62 , Issue 1 , March 1988 , pp. 15 - 28
Copyright
Copyright © Cambridge University Press 1988

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