Publication: Antibody germline characterization of cross-neutralizing human IgGs against 4 serotypes of dengue virus
Issued Date
2014-04-04
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ISSN
10902104
0006291X
0006291X
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2-s2.0-84897973155
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Mahidol University
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SCOPUS
Bibliographic Citation
Biochemical and Biophysical Research Communications. Vol.446, No.2 (2014), 475-480
Suggested Citation
Pannamthip Pitaksajjakul, Surachet Benjathummarak, Chonlatip Pipattanaboon, Waranya Wongwit, Tamaki Okabayashi, Motoki Kuhara, Ryo Misaki, Kazuhito Fujiyama, Pongrama Ramasoota Antibody germline characterization of cross-neutralizing human IgGs against 4 serotypes of dengue virus. Biochemical and Biophysical Research Communications. Vol.446, No.2 (2014), 475-480. doi:10.1016/j.bbrc.2014.02.131 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/33279
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Title
Antibody germline characterization of cross-neutralizing human IgGs against 4 serotypes of dengue virus
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Abstract
Dengue virus (DENV), a re-emerging virus, constitutes the largest vector-borne disease virus, with 50-100 million cases reported every year. Although DENV infection induces lifelong immunity against viruses of the same serotypes, the subsequent infection with the heterologous serotypes can cause more severe form of the disease, such as Dengue Haemorrhagic Fever (DHF) or Dengue Shock Syndrome (DSS). However, there is neither approved vaccine nor specific drugs available to treat this disease. In this study, previously developed 19 human monoclonal antibodies (HuMAbs) showing strong to moderate cross neutralizing activity were selected. Most of them (13/19) were targeted to domain II of envelop glycoprotein. To understand and clarify the recognition properties, the maturation mechanisms comprising Variable/Diversity/Joining (VDJ) recombination, Variable Heavy (VH)/Variable Light (VL) chain pairing, variability at junctional site, and somatic hypermutation (SHM) of those antibodies were studied and compared with their predecessor germline sequences. IMGT/V-QUEST database was applied to analyze the isolated VH and VL sequences. To confirm the correction of isolated VH/VL, 3 HuMAbs (1A10H7, 1B3B9, 1G7C2) was transiently expressed in HEK293T cell. All three clones of the expressed recombinant IgG (rIgG) showed the same binding and neutralizing activity as same as those from hybridomas. The data obtained in this study will elucidate the properties of those HuMAbs for further genetic modification, and its binding epitopes. © 2014 Elsevier Inc. All rights reserved.