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Western blot antibody determination in sera from patients diagnosed with Anisakis sensitization with different antigenic fractions of Anisakis simplex purified by affinity chromatography

Published online by Cambridge University Press:  01 September 2007

M. Rodero ,
C. Cuéllar ,
T. Chivato ,
J.M. Mateos  and
R. Laguna
M. Rodero
Affiliation:
Departamento de Parasitologia, Facultad de Farmacia, Universidad Complutense, 28040 MadridSpain
C. Cuéllar*
Affiliation:
Departamento de Parasitologia, Facultad de Farmacia, Universidad Complutense, 28040 MadridSpain
T. Chivato
Affiliation:
Servicio de Alergia e Inmunología, Hospital del Aire, 28007 Madrid, Spain
J.M. Mateos
Affiliation:
Servicio de Alergia e Inmunología, Hospital del Aire, 28007 Madrid, Spain
R. Laguna
Affiliation:
Servicio de Alergia e Inmunología, Hospital del Aire, 28007 Madrid, Spain
*
*Fax: +34 91 3941815, E-mail: cuellarh@farm.ucm.es
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Abstract

Using Western blot techniques, the specificities of crude and purified (PAK and PAS) Anisakis simplex antigens were compared against 24 sera from patients diagnosed with Anisakis sensitization. All patients recognized a 60 kDa protein against the A. simplex crude extract, while 37.5% and 12.5% reacted with proteins of 40 and 25 kDa, respectively, when IgG was tested. In the case of IgE determination, 41.6% of sera were negative, while 12.5% and 20.8% appeared to cross-react against Toxocara canis and Ascaris suum, respectively. When the PAK antigen (A. simplex antigen purified by means of a column of IgG anti-A. simplex) was tested, immune recognition towards the 60, 40 and 25 kDa proteins increased in 83.3%, 16.7% and 4.2%, respectively, when the Ig antibodies were tested. In the case of the PAS antigen (PAK antigen purified by means of a column of IgG anti-A. suum), the reaction against the 40 and 25 kDa proteins increased to 45.8% and 25%, respectively, when Ig antibodies were used. Finally, when the EAS antigen (eluted from the anti-A. suum column after PAK purification) was tested, 83.3% of the assayed sera reacted against the 14 kDa protein, when the Ig antibodies, IgG and IgM immunoglobulins were measured. With the IgE determination, the reactions were observed in 41.7% of patients with proteins between 60 and 35 kDa against the PAS antigen. With the EAS antigen, reactive bands of 184, 84 and 14 kDa appeared. In conclusion, in the purification process of the A. simplex larval crude extract, the proteins implicated in cross-reactions with Ascaris and Toxocara were eliminated, with an important concentration of proteins responsible for the induction of specific responses.

Type
Short Communication
Information
Journal of Helminthology , Volume 81 , Issue 3 , September 2007 , pp. 307 - 310
Copyright
Copyright © Cambridge University Press 2007

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