Humoral and In Vivo Cellular Immunity against the Raw Insect-Derived Recombinant Leishmania infantum Antigens KMPII, TRYP, LACK, and papLe22 in Dogs from an Endemic Area

Felicitat Todolí Unitat de Farmacologia Veterinària and LeishLAB–Servei d'Anàlisi de Fàrmacs, Departament de Farmacologia, de Terapèutica i de Toxicologia, Universitat Autònoma de Barcelona, Barcelona, Spain; Department of Pathology and Infectious Diseases, Royal Veterinary College, University of London, Hertfordshire, United Kingdom; Centre Sanitari Municipal de Protecció Animal, Palma (Mallorca), Spain; Alternative Gene Expression (ALGENEX) S.L., Madrid, Spain; Departamento de Biotecnología, Instituto Nacional de Investigación y Tecnologia Agraria y Alimentaria (INIA), Madrid, Spain

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Laia Solano-Gallego Unitat de Farmacologia Veterinària and LeishLAB–Servei d'Anàlisi de Fàrmacs, Departament de Farmacologia, de Terapèutica i de Toxicologia, Universitat Autònoma de Barcelona, Barcelona, Spain; Department of Pathology and Infectious Diseases, Royal Veterinary College, University of London, Hertfordshire, United Kingdom; Centre Sanitari Municipal de Protecció Animal, Palma (Mallorca), Spain; Alternative Gene Expression (ALGENEX) S.L., Madrid, Spain; Departamento de Biotecnología, Instituto Nacional de Investigación y Tecnologia Agraria y Alimentaria (INIA), Madrid, Spain

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Rafael de Juan Unitat de Farmacologia Veterinària and LeishLAB–Servei d'Anàlisi de Fàrmacs, Departament de Farmacologia, de Terapèutica i de Toxicologia, Universitat Autònoma de Barcelona, Barcelona, Spain; Department of Pathology and Infectious Diseases, Royal Veterinary College, University of London, Hertfordshire, United Kingdom; Centre Sanitari Municipal de Protecció Animal, Palma (Mallorca), Spain; Alternative Gene Expression (ALGENEX) S.L., Madrid, Spain; Departamento de Biotecnología, Instituto Nacional de Investigación y Tecnologia Agraria y Alimentaria (INIA), Madrid, Spain

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Pere Morell Unitat de Farmacologia Veterinària and LeishLAB–Servei d'Anàlisi de Fàrmacs, Departament de Farmacologia, de Terapèutica i de Toxicologia, Universitat Autònoma de Barcelona, Barcelona, Spain; Department of Pathology and Infectious Diseases, Royal Veterinary College, University of London, Hertfordshire, United Kingdom; Centre Sanitari Municipal de Protecció Animal, Palma (Mallorca), Spain; Alternative Gene Expression (ALGENEX) S.L., Madrid, Spain; Departamento de Biotecnología, Instituto Nacional de Investigación y Tecnologia Agraria y Alimentaria (INIA), Madrid, Spain

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Maria del Carmen Núñez Unitat de Farmacologia Veterinària and LeishLAB–Servei d'Anàlisi de Fàrmacs, Departament de Farmacologia, de Terapèutica i de Toxicologia, Universitat Autònoma de Barcelona, Barcelona, Spain; Department of Pathology and Infectious Diseases, Royal Veterinary College, University of London, Hertfordshire, United Kingdom; Centre Sanitari Municipal de Protecció Animal, Palma (Mallorca), Spain; Alternative Gene Expression (ALGENEX) S.L., Madrid, Spain; Departamento de Biotecnología, Instituto Nacional de Investigación y Tecnologia Agraria y Alimentaria (INIA), Madrid, Spain

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Rodrigo Lasa Unitat de Farmacologia Veterinària and LeishLAB–Servei d'Anàlisi de Fàrmacs, Departament de Farmacologia, de Terapèutica i de Toxicologia, Universitat Autònoma de Barcelona, Barcelona, Spain; Department of Pathology and Infectious Diseases, Royal Veterinary College, University of London, Hertfordshire, United Kingdom; Centre Sanitari Municipal de Protecció Animal, Palma (Mallorca), Spain; Alternative Gene Expression (ALGENEX) S.L., Madrid, Spain; Departamento de Biotecnología, Instituto Nacional de Investigación y Tecnologia Agraria y Alimentaria (INIA), Madrid, Spain

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Silvia Gómez-Sebastián Unitat de Farmacologia Veterinària and LeishLAB–Servei d'Anàlisi de Fàrmacs, Departament de Farmacologia, de Terapèutica i de Toxicologia, Universitat Autònoma de Barcelona, Barcelona, Spain; Department of Pathology and Infectious Diseases, Royal Veterinary College, University of London, Hertfordshire, United Kingdom; Centre Sanitari Municipal de Protecció Animal, Palma (Mallorca), Spain; Alternative Gene Expression (ALGENEX) S.L., Madrid, Spain; Departamento de Biotecnología, Instituto Nacional de Investigación y Tecnologia Agraria y Alimentaria (INIA), Madrid, Spain

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José M. Escribano Unitat de Farmacologia Veterinària and LeishLAB–Servei d'Anàlisi de Fàrmacs, Departament de Farmacologia, de Terapèutica i de Toxicologia, Universitat Autònoma de Barcelona, Barcelona, Spain; Department of Pathology and Infectious Diseases, Royal Veterinary College, University of London, Hertfordshire, United Kingdom; Centre Sanitari Municipal de Protecció Animal, Palma (Mallorca), Spain; Alternative Gene Expression (ALGENEX) S.L., Madrid, Spain; Departamento de Biotecnología, Instituto Nacional de Investigación y Tecnologia Agraria y Alimentaria (INIA), Madrid, Spain

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Jordi Alberola Unitat de Farmacologia Veterinària and LeishLAB–Servei d'Anàlisi de Fàrmacs, Departament de Farmacologia, de Terapèutica i de Toxicologia, Universitat Autònoma de Barcelona, Barcelona, Spain; Department of Pathology and Infectious Diseases, Royal Veterinary College, University of London, Hertfordshire, United Kingdom; Centre Sanitari Municipal de Protecció Animal, Palma (Mallorca), Spain; Alternative Gene Expression (ALGENEX) S.L., Madrid, Spain; Departamento de Biotecnología, Instituto Nacional de Investigación y Tecnologia Agraria y Alimentaria (INIA), Madrid, Spain

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Alhelí Rodríguez-Cortés Unitat de Farmacologia Veterinària and LeishLAB–Servei d'Anàlisi de Fàrmacs, Departament de Farmacologia, de Terapèutica i de Toxicologia, Universitat Autònoma de Barcelona, Barcelona, Spain; Department of Pathology and Infectious Diseases, Royal Veterinary College, University of London, Hertfordshire, United Kingdom; Centre Sanitari Municipal de Protecció Animal, Palma (Mallorca), Spain; Alternative Gene Expression (ALGENEX) S.L., Madrid, Spain; Departamento de Biotecnología, Instituto Nacional de Investigación y Tecnologia Agraria y Alimentaria (INIA), Madrid, Spain

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Leishmania infantum causes visceral leishmaniasis, a severe zoonotic and systemic disease that is fatal if left untreated. Identification of the antigens involved in Leishmania-specific protective immune response is a research priority for the development of effective control measures. For this purpose, we evaluated, in 27 dogs from an enzootic zone, specific humoral and cellular immune response by delayed-type hypersensitivity (DTH) skin test both against total L. infantum antigen and the raw Trichoplusia ni insect-derived kinetoplastid membrane protein-11 (rKMPII), tryparedoxin peroxidase (rTRYP), Leishmania homologue of receptors for activated C kinase (rLACK), and 22-kDa potentially aggravating protein of Leishmania (rpapLe22) antigens from this parasite. rTRYP induced the highest number of positive DTH responses (55% of leishmanin skin test [LST]-positive dogs), showing that TRYP antigen is an important T cell immunogen, and it could be a promising vaccine candidate against this disease. When TRYP-DTH and KMPII-DTH tests were evaluated in parallel, 82% of LST-positive dogs were detected, suggesting that both antigens could be considered as components of a standardized DTH immunodiagnostic tool for dogs.

Author Notes

*Address correspondence to Alhelí Rodríguez-Cortés, Unitat de Farmacologia Veterinària and LeishLAB–Servei d'Anàlisi de Fàrmacs, Departament de Farmacologia, de Terapèutica i de Toxicologia, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain. E-mail: alheli.rodriguez@uab.cat
†These authors contributed equally.

Financial support: F.T. was supported by Generalitat de Catalunya Grant 2005 FI 01116. This work was financed by Projects BIO2004-03893 and AGL2008-00748 (both for J.A.) from the Spanish Government.

Authors' addresses: Felicitat Todolí, Jordi Alberola, and Alhelí Rodríguez-Cortés, Unitat de Farmacologia Veterinària and LeishLAB–Servei d'Anàlisi de Fàrmacs, Departament de Farmacologia, de Terapèutica i de Toxicologia, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain, E-mails: Felicitat.Todoli@uab.cat, Jordi.Alberola@uab.cat, and Alheli.Rodriguez@uab.cat. Laia Solano-Gallego, Department of Pathology and Infectious Diseases, Royal Veterinary College, University of London, Hertfordshire, United Kingdom, E-mail: lsolano@rvc.ac.uk. Rafael de Juan and Pere Morell, Centre Sanitari Municipal de Protecció Animal, Palma, Mallorca, Spain, E-mails: rdjuan@sf.a-palma.es and centreproteccioanimal@sf.a-palma.es. Maria del Carmen Núñez, Rodrigo Lasa, and Silvia Gómez-Sebastián, Alternative Gene Expression S.L. (ALGENEX), Centro Empresarial, Parque Científico y Tecnológico de la Universidad Politécnica de Madrid, Campus de Montegancedo, Madrid, Spain, E-mails: mcn@algenex.es, rlc@algenex.es, and sgs@algenex.es. José M. Escribano, Departamento de Biotecnología, Instituto Nacional de Investigación y Tecnologia Agraria y Alimentaria, Madrid, Spain, E-mail: escriban@inia.es.

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