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
in Zh
| WPRIM
| ID: wpr-322028
Responsible library:
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>
Full text:
1
Index:
WPRIM
Main subject:
Penicillium
/
Pichia
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Blood
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Enzyme-Linked Immunosorbent Assay
/
Sensitivity and Specificity
/
Diagnosis
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Allergy and Immunology
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Methods
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Microbiology
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Antibodies, Fungal
Type of study:
Diagnostic_studies
Limits:
Humans
Language:
Zh
Journal:
Journal of Southern Medical University
Year:
2013
Type:
Article