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Mesenchymal stem cells stimulate antibody secretion in human B cells.
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- Rasmusson, Ida (author)
- Karolinska Institutet,Uppsala universitet,Institutionen för onkologi, radiologi och klinisk immunologi
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- Le Blanc, K (author)
- Karolinska Institutet
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- Sundberg, B (author)
- Karolinska Institutet
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- (creator_code:org_t)
- Wiley, 2007
- 2007
- English.
- In: Scandinavian Journal of Immunology. - : Wiley. - 0300-9475 .- 1365-3083. ; 65:4, s. 336-343
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Mesenchymal stem cells (MSC) have immunomodulatory effects and inhibit T-cell responses to alloantigens and mitogens in vitro and in vivo. We wanted to examine the effect of MSC on human B cells. MSC stimulated IgG production, measured in an enzyme-linked immunospot (ELIspot) assay in blood and spleen lymphocytes. MSC only induced a low proliferation. When a semipermeable membrane separated MSC and mononuclear cells, the IgG production was stimulated in unfractionated lymphocytes. In contrast, enriched B cells required cell contact with MSC to produce IgG. Co-cultures of MSC and lymphocytes increased IFN-γ production. MSC produce IL-6, and addition of MSC to spleen cells dramatically increased IL-6 levels. After lymphocyte stimulation with lipopolysaccharide (LPS), cytomegalovirus or varicella zoster virus, MSC either stimulated or inhibited IgG response, depending on the level of stimulation by LPS or the viral antigens. Similar results were obtained for enriched B cells. To conclude, MSC stimulate B-cell antibody secretion. The IgG secretion by activated B cells may be stimulated or inhibited by the addition of MSC, depending on the level of stimulation.
Keyword
- Antibody Formation
- B-Lymphocytes/*cytology/*immunology
- Cell Communication/immunology
- Coculture Techniques
- Humans
- Immunoglobulin G/*biosynthesis
- Interferon Type II/biosynthesis
- Interleukin-6/biosynthesis
- Lymphocyte Activation/*immunology
- Mesenchymal Stem Cells/*immunology
- MEDICINE
- MEDICIN
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- ref (subject category)
- art (subject category)
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