alexa Integrase-deficient lentivirus: opportunities and challenges for human gene therapy.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Genetic Syndromes & Gene Therapy

Author(s): Liu KC, Lin BS, Gao AD, Ma HY, Zhao M,

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Abstract Lentiviruses are powerful tools for gene delivery and have been widely used for the dissection of gene functions in both replicating and quiescent cells. Recently, lentiviruses have also been used for delivering target sequences in gene therapy. Although the lentiviral system provides sustained exogenous gene expression, serious concerns have been raised due to its unfavorable insertion-mediated mutagenesis effect, thereby resulting in the silencing or activation of some unexpected genes. Thus, an array of modifications of the original vectors may reduce risks. Here, we briefly review the structure of the integrase protein, which is an essential protein for viral insertion and integration; the mechanisms of integrase-mediated integration; and the effects of the modifications of integrase. Moreover, we discuss the advantages resulting from integrase modifications and their future applications. Taken together, the generation of integrase-deficient lentivirus (IDLV) not only provides us with an opportunity to reduce the risk of virus-mediated insertions, which would improve the safety of gene therapy, but also favors gene correction and vaccine development.
This article was published in Curr Gene Ther and referenced in Journal of Genetic Syndromes & Gene Therapy

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