Interaction between the immunoglobulin heavy chain 3' regulatory region and the IgH transcription unit during B cell differentiation

Zhongliang Ju, Sanjukta Chatterjee, Barbara K. Birshtein

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The immunoglobulin heavy (Igh) chain locus is subject to precisely regulated processes, such as variable region gene formation through recombination of variable (V H), diversity (D H), and joining (J H) segments, class switching and somatic hypermutation. The 3' regulatory region (3' RR) is a key regulator of the Igh locus, and, as revealed by deletions in mouse plasma cell lines and mice, is required for IgH expression as well as class switching. One of the mechanisms by which the 3' RR regulates its targets is through long-range physical interactions. Such interactions between elements of the 3' RR and a target site in the IgH transcription unit have been detected in plasma cells, and in resting and switching B cells, where they have been associated with IgH expression and class switching, respectively. Here, we report that lentiviral shRNA knockdown of transcription factors, CTCF, Oct-2, or OBF-1/OCA-B, had no discernible defects in loop formation or H chain expression in plasma cells. J H-3' RR interactions in pre-B cell lines were specifically associated with IgH expression. J H-3' RR interactions were not detected in either Pax5-deficient or RAG-deficient pro-B cells, but were apparent in an Abelson-derived pro-B cell line. These observations imply that the 3' RR has different loop interactions with target Igh sequences at different stages of B cell development and Igh regulation.

Original languageEnglish (US)
Pages (from-to)297-303
Number of pages7
JournalMolecular Immunology
Volume49
Issue number1-2
DOIs
StatePublished - Oct 2011

Fingerprint

Immunoglobulin Heavy Chains
Nucleic Acid Regulatory Sequences
Cell Differentiation
B-Lymphocytes
Immunoglobulin Class Switching
B-Lymphoid Precursor Cells
Plasma Cells
Immunoglobulins
Cell Line
Octamer Transcription Factor-2
Small Interfering RNA
Genetic Recombination
Genes

Keywords

  • B cell development
  • Chromosome conformation capture (3C)
  • Immunoglobulin gene rearrangements
  • Immunoglobulin heavy chain gene expression
  • Lentivirus-mediated shRNA
  • Long-range enhancer interactions

ASJC Scopus subject areas

  • Molecular Biology
  • Immunology

Cite this

Interaction between the immunoglobulin heavy chain 3' regulatory region and the IgH transcription unit during B cell differentiation. / Ju, Zhongliang; Chatterjee, Sanjukta; Birshtein, Barbara K.

In: Molecular Immunology, Vol. 49, No. 1-2, 10.2011, p. 297-303.

Research output: Contribution to journalArticle

Ju, Zhongliang ; Chatterjee, Sanjukta ; Birshtein, Barbara K. / Interaction between the immunoglobulin heavy chain 3' regulatory region and the IgH transcription unit during B cell differentiation. In: Molecular Immunology. 2011 ; Vol. 49, No. 1-2. pp. 297-303.
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