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Further Characterization of Activin A-induced IgA Response in Murine B Lymphocytes

Hwa-Joung Lee1, Pyeung-Hyeun Kim

  • 1Department of Molecular Bioscience, School of Bioscience and Biotechnology, Kangwon National University, Chuncheon 200-701, Korea.

Immune Network
|February 17, 2010
PubMed

We have recently shown that activin A, a member of TGF-beta superfamily, stimulates mouse B cells to express IgA isotype but other isotypes. In the present study, we further characterized effects of activin A on B cell growth and IgA expression. We found that activin A did not have effect on LPS-stimulated cell viability. In parallel, CFSE staining analysis revealed that activin A did not alter cell division. An increase of IgA secretion by activin A was completely abrogated by anti-activin A Ab but not by anti-TGFbeta1 Ab. In the same conditions, no other isotypes are significantly affected by each antibody treatment. Finally, activin A, as similar to TGF-beta1, increased IgA secretion by mesenteric lymph node cells. These results suggest that activin A can specifically stimulate IgA response, independent of TGF-beta in the gut.

Keywords:
CFSEIgATGF-βactivin Amesenteric lymph node

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