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. 1984 Nov;81(21):6846–6850. doi: 10.1073/pnas.81.21.6846

Regulation of T-cell function by antibodies: enhancement of the response of human T-cell clones to hepatitis B surface antigen by antigen-specific monoclonal antibodies.

E Celis, V R Zurawski Jr, T W Chang
PMCID: PMC392029  PMID: 6436821

Abstract

Eight mouse monoclonal antibodies specific for hepatitis B surface antigen (HBsAg) were examined for their effects on the antigen-induced proliferative response and lymphokine production of human HBsAg-specific T-cell clones in vitro. While all specifically enhanced the T-cell proliferative response, antibodies of the IgG class were generally more effective than those of the IgM class. Both the divalent F(ab')2 and the monovalent Fab fragments of an IgG monoclonal antibody had no effects, indicating that the Fc portion of the antibody molecules was required. Since antigen-presenting cells bear surface receptors for the Fc of IgGs and fewer or none for that of IgMs, the above results also suggest that antibodies enhance the capture of antigens by antigen-presenting cells as a result of the binding of antigen-antibody complexes to the Fc receptors on these cells. In addition to potentiating the proliferation of the T-cell clones, antibodies also increased the antigen-induced production of interferon-gamma by these cells. The present in vitro studies suggest that antibodies may regulate immune responses and do so by enhancing antigen presentation and thus augmenting antigen-induced activation and clonal expansion of T cells.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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