Determination of antibody concentration as the main parameter in a dengue virus antibody-dependent enhancement assay using FcγR-expressing BHK cells

Determination of antibody concentration as the main parameter in a dengue virus... Dengue virus (DENV) causes a life-threatening illness, with a wide range of symptoms from mild febrile illness, dengue fever (DF), to life-threatening illness, dengue hemorrhagic fever (DHF). Antibody-dependent enhancement (ADE) is considered to be a risk factor for DHF. In the present study, we determined the parameters for ADE assays using FcγR-expressing BHK cells. Monoclonal antibodies and human serum samples were used in the assays. We examined antibody concentration and virus concentration and analyzed whether antibody concentration or DENV-antibody ratio determines ADE activity. Virus growth was quantified by a conventional plaque titration method using FcγR-expressing BHK cells. The assay allowed the detection of DENV growth with inoculation doses ranging from 10 2 PFU/ml to 10 6 PFU/ml using monoclonal antibodies and undiluted or diluted serum samples. The results indicate that antibody concentration rather than DENV-antibody ratio determines the demonstration of ADE activity. Thus, antibody concentration rather than multiplicity of infection was defined as the main determinant in ADE assays using FcγR-expressing BHK cells. Archives of Virology Springer Journals

Determination of antibody concentration as the main parameter in a dengue virus antibody-dependent enhancement assay using FcγR-expressing BHK cells

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Springer Vienna
Copyright © 2014 by Springer-Verlag Wien
Biomedicine; Virology; Medical Microbiology; Infectious Diseases
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