Send to

Choose Destination
See comment in PubMed Commons below
Hum Gene Ther. 2009 Dec;20(12):1652-64. doi: 10.1089/hum.2009.012.

Nonintegrating lentiviral vectors can effectively deliver ovalbumin antigen for induction of antitumor immunity.

Author information

Mork Family Department of Chemical Engineering and Material Science, University of Southern California, Los Angeles, CA 90089, USA.


It has been demonstrated that nonintegrating lentiviral vectors (NILVs) are efficient in maintaining transgene expression in vitro and in vivo. Gene delivery by NILVs can significantly reduce nonspecific vector integration, which has been shown to cause malignant transformation in patients receiving gene therapy for X-linked severe combined immunodeficiency. Strong and sustained immune responses were observed after a single immunization with NILVs carrying viral antigens. However, there is no report to date that evaluates the efficacy of NILVs in inducing antigen-specific antitumor immunity. Using a well-characterized tumor model, we tested in vivo immunization with a self-inactivating lentiviral vector harboring a defective integrase. A high frequency of ovalbumin peptide (OVAp1)-specific CD8(+) T cells and a substantial antibody response were detected in naive mice immunized with an NILV encoding an OVA transgene. Furthermore, this immunization method completely protected the mice against the growth of E.G7 tumor cells expressing the OVA antigen. Thus, this study provides evidence that immunization using NILVs can be a safe and promising approach for exploring cancer immunotherapy.

[Indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Mary Ann Liebert, Inc. Icon for PubMed Central
    Loading ...
    Support Center