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Efficient gene transfer and expression in primary B lymphocytes.

R W Overell1, K E Weisser, B W Hess

  • 1Department of Molecular Biology, Immunex Corporation, Seattle, WA 98101.

Journal of Immunological Methods
|July 26, 1991
PubMed
Summary
This summary is machine-generated.

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Researchers optimized gene transfer into primary B lymphocytes using retroviral vectors. The human cytomegalovirus immediate-early enhancer/promoter demonstrated efficient gene expression and stable transfer in these cells.

Area of Science:

  • Molecular Biology
  • Immunology
  • Virology

Background:

  • Optimizing gene transfer and expression in primary B lymphocytes is crucial for research and therapeutic applications.
  • Traditional promoters like Moloney murine leukemia virus long terminal repeat (MoMLV LTR) and SV40 early region show limited function in primary B cells.

Purpose of the Study:

  • To identify and optimize regulatory elements for efficient gene transfer and expression in primary B lymphocytes.
  • To develop a stable retroviral vector system for high-level gene delivery into primary B cells.

Main Methods:

  • Utilized chloramphenicol acetyltransferase (CAT) reporter gene assays to evaluate promoter activity.
  • Constructed and tested various retroviral vectors with different promoters, including human cytomegalovirus immediate-early (HCMV-IE) and Adenovirus 2 major late promoter.

Related Experiment Videos

  • Assessed vector integrity using Southern analysis and measured gene expression levels in primary B lymphocytes.

    • Main Results:

    • HCMV-IE enhancer/promoter showed significant activity in primary B lymphocytes, outperforming MoMLV LTR and SV40 early promoters.
    • Vectors combining HCMV-IE or Adenovirus 2 major late promoter with Adenovirus 2 tripartite leader and VA genes yielded highest expression.
    • A retroviral vector containing the HCMV-IE enhancer/promoter and an hph drug resistance gene demonstrated stable gene transfer without rearrangement, achieving high CAT activity in primary B cells.

    Conclusions:

    • The HCMV-IE enhancer/promoter is a highly effective regulatory element for gene expression in primary B lymphocytes.
    • A stable retroviral vector system utilizing the HCMV-IE enhancer/promoter enables efficient gene transfer and high-level expression in primary B lymphocytes.
    • This optimized system provides a valuable tool for genetic manipulation of primary B lymphocytes in vitro.