A double-antigen sandwich ELISA for detecting Penicillium marneffei Mp1p-specific antibody / 南方医科大学学报
Journal of Southern Medical University
; (12): 439-443, 2013.
Article
em Zh
| WPRIM
| ID: wpr-322028
Biblioteca responsável:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To establish an immunological method for detecting antibodies of Penicillium marneffei.</p><p><b>METHODS</b>The recombinant Mp1p protein of Penicillium marneffei was expressed in Pichia pastoris and labeled with HRP (Mp1p-HRP) with a modified sodium periodate method. A double-antigen sandwich enzyme-linked immunosorbant assay (ELISA) was established by determining the optimal coating concentration of Mp1p protein and the concentration of the detecting protein Mp1p-HRP. The sensitivity and specificity of the assay was evaluated by detecting Mp1p antibodies in 100 serum samples from healthy donors, 15 samples from culture-confirmed penicilliosis patients, and 21 samples from patients with culture-confirmed other fungal infections.</p><p><b>RESULTS</b>A double-antigen sandwich ELISA was successfully established for detecting Mp1p-specific antibody. The specificity of the assay was 100% (121/121) for detecting Mp1p-specific antibody in the sera from healthy donors and patients with other fungal infection. The detection results of the 15 serum samples from patients with culture-confirmed penicilliosis showed positivity for Mp1p antibody in 2 samples and Mp1p antigen positivity in 12 samples; combining the detection results of Mp1p antigen and antibody obviously increased the diagnostic sensitivity to 93.3% (14/15).</p><p><b>CONCLUSION</b>The double-antigen sandwich ELISA shows a high specificity in detecting Mp1p-specific antibody, and simultaneous detection of Mp1p antigen and antibody can increase the diagnostic sensitivity for penicilliosis.</p>
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Base de dados:
WPRIM
Assunto principal:
Penicillium
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Pichia
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Sangue
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Ensaio de Imunoadsorção Enzimática
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Sensibilidade e Especificidade
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Diagnóstico
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Alergia e Imunologia
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Métodos
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Microbiologia
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Anticorpos Antifúngicos
Tipo de estudo:
Diagnostic_studies
Limite:
Humans
Idioma:
Zh
Revista:
Journal of Southern Medical University
Ano de publicação:
2013
Tipo de documento:
Article