Characterising the KMP-11 and HSP-70 recombinant antigens' humoral immune response profile in chagasic patients
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  • 作者：Ivonne D Flechas (1)
    Adriana Cuellar (2)
    Zulma M Cucunubá (3)
    Fernando Rosas (4)
    Víctor Velasco (4)
    Mario Steindel (5)
    del Carmen María Thomas (6)
    Manuel Carlos López (6)
    John Mario González (7)
    Judith Concepción Puerta (1)
  • 刊名：BMC Infectious Diseases
  • 出版年：2009
  • 出版时间：December 2009
  • 年：2009
  • 卷：9
  • 期：1
  • 全文大小：2080KB
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    44. The pre-publication history for this paper can be accessed here:com/1471-2334/9/186/prepub" class="a-plus-plus">http://www.biomedcentral.com/1471-2334/9/186/prepub
  • 作者单位：Ivonne D Flechas (1)
    Adriana Cuellar (2)
    Zulma M Cucunubá (3)
    Fernando Rosas (4)
    Víctor Velasco (4)
    Mario Steindel (5)
    del Carmen María Thomas (6)
    Manuel Carlos López (6)
    John Mario González (7)
    Judith Concepción Puerta (1)

    1. Laboratorio de Parasitología Molecular, Pontificia Universidad Javeriana, Cra. 7a No. 43-82, Ed. 50, Lab. 113, Bogotá, Colombia
    2. Grupo de Inmunobiología y Biología Celular, Pontificia Universidad Javeriana, Cra. 7a No. 43-82, Ed. 50, Lab. 101, Bogotá, Colombia
    3. Grupo de Parasitología, Instituto Nacional de Salud, Calle 26 No. 51-60, Bogotá, Colombia
    4. Fundación Clínica Abood Shaio, Diag, 110 No. 53-67, Bogotá, Colombia
    5. Departamento de Microbiologia e Parasitologia, Universidade Federal de Santa Catarina, 88040-900, Florianópolis, Santa Catarina, Brazil
    6. Instituto de Parasitología y Biomedicina López Neyra - CSIC - Parque Tecnológico de Ciencias de la Salud, Av del Conocimiento s/n. 18100 Armilla, Granada, Spain
    7. Grupo de Ciencias Básicas Médicas, Facultad de Medicina, Universidad de los Andes, Cra. 1a. No. 18A-10, Bogotá, Colombia
文摘
Background Antigen specificity and IgG subclass could be significant in the natural history of Chagas' disease. The relationship between the different stages of human Chagas' disease and the profiles of total IgG and its subclasses were thus analysed here; they were directed against a crude T. cruzi extract and three recombinant antigens: the T. cruzi kinetoplastid membrane protein-11 (rKMP-11), an internal fragment of the T. cruzi HSP-70 protein192-433, and the entire Trypanosoma rangeli HSP-70 protein. Methods Seventeen Brazilian acute chagasic patients, 50 Colombian chronic chagasic patients (21 indeterminate and 29 cardiopathic patients) and 30 healthy individuals were included. Total IgG and its subtypes directed against the above-mentioned recombinant antigens were determined by ELISA tests. Results The T. cruzi KMP-11 and T. rangeli HSP-70 recombinant proteins were able to distinguish both acute from chronic chagasic patients and infected people from healthy individuals. Specific antibodies to T. cruzi crude antigen in acute patients came from IgG3 and IgG4 subclasses whereas IgG1 and IgG3 were the prevalent isotypes in indeterminate and chronic chagasic patients. By contrast, the specific prominent antibodies in all disease stages against T. cruzi KMP-11 and T. rangeli HSP-70 recombinant antigens were the IgG1 subclass. Conclusion T. cruzi KMP-11 and the T. rangeli HSP-70 recombinant proteins may be explored together in the immunodiagnosis of Chagas' disease. Polarising the IgG1 subclass of the IgG response to T. cruzi KMP-11 and T. rangeli HSP-70 recombinant proteins could have important biological effects, taking into account that this is a complement fixing antibody.

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