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Blood stage plasmodium falciparum antigens induce immunoglobulin class switching in human enriched B cell culture
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2009 (English)In: Southeast Asian Journal of Tropical Medicine and Public Health, ISSN 0125-1562, Vol. 40, no 4, 651-664 p.Article in journal (Refereed) Published
Abstract [en]

This study aimed to demonstrate class switch recombination (CSR) in heavy chain expressing immunoglobulin G (IgG) and IgE in human B cells after exposure to Plasmodium falciparum schizont lysate. Human B cells (CD20(+)CD27(-)) were Cultured with crude P, falciparum antigen (cPfAg) and anti-CD40. On Day 4 post-exposure, total RNA from B cells was prepared and the occurrence of CSR from IgM to IgG and/or IgE was investigated by reverse transcription-polymerase chain reaction. Molecular markers to detect active CSR included enzyme activation-induced cytidine deaminase mRNA, gamma and epsilon-germline transcripts (gamma, epsilon-GLT), circle transcript (CT) and mature transcript (gamma and epsilon-mRNA) expression. On Day 7 and Day 14 after exposure, levels of Igs in the culture supernatant were determined by enzyme-linked immunosorbent assay. Our findings showed that we could demonstrate cPfAg-stimulated B cells undergoing CSR by use of the expressed CSR markers and the increase in specific IgG and IgE indicating the potential of this approach in the study of CSR in P. falciparum-stimulated B cells.

Place, publisher, year, edition, pages
2009. Vol. 40, no 4, 651-664 p.
Keyword [en]
induced cytidine deaminase, anti-cd40 monoclonal-antibody, ige antimalarial antibodies, cerebral malaria, nasal-mucosa, recombination, cytokines, cd40, il-4, expression
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URN: urn:nbn:se:su:diva-59975ISI: 000268676800001OAI: diva2:432478
authorCount :7Available from: 2011-08-03 Created: 2011-08-02 Last updated: 2011-08-03Bibliographically approved

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Troye-Blomberg, Marita
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