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Dietary omega-3 fatty acids enhance the B1 but not the B2 cell immune response in mice with antigen-induced peritonitis.

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Authors
Tomasdottir, Valgerdur
Thorleifsdottir, Sigrun
Vikingsson, Arnor
Hardardottir, Ingibjorg
Freysdottir, Jona
Issue Date
2014-02

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Citation
J. Nutr. Biochem. 2014, 25(2):111-7
Abstract
The effects of omega-3 fatty acids on the adaptive immune response have mainly been analysed in vitro with varying results. How omega-3 fatty acids affect the adaptive immune response in vivo is largely unknown. This study examined the effects of dietary fish oil on the adaptive immune response in antigen-induced inflammation in mice, focusing on its effects on B cells and B cell subsets. Mice were fed a control diet with or without 2.8% fish oil, immunized twice with methylated BSA (mBSA) and peritonitis induced by intraperitoneal injection of mBSA. Serum, spleen and peritoneal exudate were collected prior to and at different time points after induction of peritonitis. Serum levels of mBSA-specific antibodies were determined by ELISA and the number of peritoneal and splenic lymphocytes by flow cytometry. The levels of germinal center B cells and IgM(+), IgG(+) and CD138(+) cells in spleen were evaluated by immunoenzyme staining. Mice fed the fish oil diet had more peritoneal B1 cells, more IgM(+) cells in spleen and higher levels of serum mBSA-specific IgM antibodies compared with that in mice fed the control diet. However, dietary fish oil did not affect the number of peritoneal B2 cells, splenic IgG(+) or CD138(+) cells or serum levels of mBSA-specific IgG antibodies in mice with mBSA-induced peritonitis. These results indicate that dietary fish oil can enhance the adaptive immune response, specifically the B1 cell response, which may lead to better protection against secondary infection as well as improvement in reaching homeostasis following antigenic challenge.
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http://dx.doi.org/10.1016/j.jnutbio.2013.09.010
http://www.sciencedirect.com/science/article/pii/S095528631300212X#
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Archived with thanks to The Journal of nutritional biochemistry
ae974a485f413a2113503eed53cd6c53
10.1016/j.jnutbio.2013.09.010
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English Journal Articles (Peer Reviewed)

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