Novel monoclonal antibodies against Plasmodium falciparum histidine-rich protein 2: development and application in rapid diagnostic tests of malaria in hyperendemic regions of China and MyanmarReportar como inadecuado




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BMC Microbiology

, 15:98

First Online: 12 May 2015Received: 23 October 2014Accepted: 22 April 2015DOI: 10.1186-s12866-015-0429-1

Cite this article as: Kang, K., Dzakah, E.E., Li, W. et al. BMC Microbiol 2015 15: 98. doi:10.1186-s12866-015-0429-1

Abstract

BackgroundMalaria presents a considerable threat to public health. Histidine-rich protein 2 HRP 2 is the major protein released into human blood upon infection by Plasmodium falciparum. In this study, we aimed to evaluate the immunogenicity of HRP 2 exon II and the efficacy of novel monoclonal antibodies mAbs against HRP 2 for Point-of-Care Test POCT.

MethodsThe recombinant protein was expressed in soluble form in E. coli and used to immunize mice for mAb production. Two IgG1 mAbs 1A5 and 1C10 with high affinity, specificity and sensitivity for both native and recombinant HRP 2 were selected after fusion of mouse spleen with myeloma cells. The affinity constant of 1A5 and 1C10 were 7.15 and 4.91 × 10-7 L-mol, respectively. Subsequently, an immunochromatograhic assay was used for screening of clinical samples in endemic regions of China and Myanmar.

ResultsThe immunochromatographic test retrospectively showed an overall sensitivity of 99.07%, and specificity of 100%. Sensitivity at parasite densities < 200, 200–2000, and > 2000 parasites-μL was 87.5, 98.7, and 100%, respectively.

ConclusionsThese results suggest that HRP 2 exon II contains immunogenic sites similar to those of the native antigen and can be used for the development of mAbs suitable for malaria diagnosis in endemic communities.

KeywordsMalaria Histidine-rich protein 2 exon II Monoclonal antibodies Point-of-care test Immunochromatographic test  Download fulltext PDF



Autor: Keren Kang - Emmanuel E Dzakah - Wenmei Li - Mingquan Xie - Xiaochun Luo - Hui Liu

Fuente: https://link.springer.com/







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