PMID: 8609402Apr 15, 1996Paper

Regulation of 3' IgH enhancers by a common set of factors, including kappa B-binding proteins

The Journal of Immunology : Official Journal of the American Association of Immunologists
J S MichaelsonB K Birshtein

Abstract

Targeted disruption of the p50 subunit of NF-kappa B resulted in isotype class switch defects resembling those observed in mice in which the downstream IgH enhancer 3'alpha E(hs1,2) was deleted. We postulated that kappa B binding proteins may regulate class switching by interacting with 3'alpha E(hs1,2) or with other IgH 3' enhancers with which 3'alpha E(hs1,2) synergizes. kappa B binding sites were identified in 3'alpha E(hs1,2) and 3' alpha-hs4, the distal 3' IgH enhancer. A kappa B binding site within 3'alpha E(hs1,2) contributes to at least half the activity of the enhancer in plasma cells, while the same kappa B binding site participates in the complex repression of the enhancer in B cells. In the case of 3'alpha-hs4, a kappa B binding complex activates the enhancer in pre-B, B cells and plasma cells. Additional binding sites within 3'alpha-hs4 for factors known to regulate 3'alpha E(hs1,2), including Oct-1 and BSAP, were identified, and their contribution to 3'alpha-hs4 regulation during B cell development was assessed. Oct-1 positively regulates the enhancer in pre-B and B cells, while BSAP is a repressor in pre-B cells and an activator at the B cell stage. These studies identify kappa B binding proteins as key modulator...Continue Reading

Related Concepts

Related Feeds

B cell Differentiation

Depending on the signal received through the B cell receptor and other receptors, B cells differentiate into follicular or marginal zone B cells. Here is the latest research pertaining to this differentiation process.

CREs: Gene & Cell Therapy

Gene and cell therapy advances have shown promising outcomes for several diseases. The role of cis-regulatory elements (CREs) is crucial in the design of gene therapy vectors. Here is the latest research on CREs in gene and cell therapy.

Related Papers

The Journal of Immunology : Official Journal of the American Association of Immunologists
J S MichaelsonB K Birshtein
The Journal of Immunology : Official Journal of the American Association of Immunologists
G Qiu, J Stavnezer
Proceedings of the National Academy of Sciences of the United States of America
M Singh, B K Birshtein
© 2021 Meta ULC. All rights reserved