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KMID : 0923620130130010010
Immune Network
2013 Volume.13 No. 1 p.10 ~ p.15
Alum Directly Modulates Murine B Lymphocytes to Produce IgG1 Isotype
Jin Bo-Ra

Kim Sun-Jin
Lee Jeong-Min
Kang Seong-Ho
Han Hye-Ju
Jang Young-Saeng
Seo Goo-Young
Abstract
Aluminum hydroxide (alum) is the most widely used adjuvant in human vaccines. Nevertheless, it is virtually unknown whether alum acts on B cells. In the present study, we explored the direct effect of alum on Ig expression by murine B cells in vitro. LPS-activated mouse spleen B cells were cultured with alum, and the level of isotype-specific Ig secretion, IgG1 secreting cell numbers, and Ig germ-line transcripts (GLT) were measured using ELISA, ELISPOT, and RT-PCR, respectively. Alum consistently enhanced total IgG1 production, numbers of IgG1 secreting cells, and GLT?1 expression. These results demonstrate that alum can directly cause IgG1 isotype switching leading to IgG1 production.
KEYWORD
IgG1, B lymphocyte, Isotype switch
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