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G2 cell cycle arrest and cyclophilin A in lentiviral gene transfer

Shangming Zhang1, Guiandre Joseph, Karen Pollok

  • 1Department of Medical and Molecular Genetics, Indiana University School of Medicine, 975 West Walnut Street, Indianapolis, IN 46202, USA.

Molecular Therapy : the Journal of the American Society of Gene Therapy
|August 12, 2006
PubMed

Insights

Genistein enhances lentiviral vector transduction by inducing G2 cell cycle arrest and increasing cyclophilin A, improving gene therapy efficiency.

Area of Science:

  • Molecular Biology
  • Gene Therapy
  • Virology

Background:

  • Lentiviral vectors, derived from human immunodeficiency virus-1 (HIV-1), efficiently transduce nondividing cells.
  • Enhancing lentiviral transduction is crucial for improving gene therapy efficacy.

Purpose of the Study:

  • To investigate the effect of genistein on lentiviral vector transduction.
  • To determine the mechanisms underlying genistein-mediated enhancement of gene transfer.

Main Methods:

  • Assessed lentiviral transduction efficiency in various human and murine cell lines using genistein.
  • Measured vector expression and vector DNA copy number via quantitative PCR.
  • Investigated the roles of G2 cell cycle arrest and cyclophilin A (CypA) in genistein's effect.

Main Results:

  • Genistein significantly enhanced lentiviral transduction in a dose-dependent manner across multiple cell types.
  • Increased transduction correlated with higher vector DNA copy number.
  • Genistein-mediated G2 cell cycle arrest was identified as the primary driver of enhanced gene transfer, independent of protein tyrosine kinase (PTK) inhibition.
  • Genistein also increased cyclophilin A (CypA) levels, another factor important for lentiviral infection.

Conclusions:

  • Genistein effectively improves lentiviral gene transfer efficiency.
  • Both G2 cell cycle arrest and increased CypA are independent factors promoting lentiviral transduction.
  • Genistein and other G2-arresting agents hold promise for advancing lentiviral gene therapy.

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