Cited by 189Virus-based gene therapy researchCRISPR and Genetic EngineeringRNA Interference and Gene Delivery

Uncovering and Dissecting the Genotoxicity of Self-inactivating Lentiviral Vectors In Vivo

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Cesana, Daniela, Ranzani, Marco, Volpin, Monica, Bartholomae, Cynthia, Duros, Caroline, Artus, Alexandre, Merella, Stefania, Benedicenti, Fabrizio +11 more·2014·Molecular Therapy

Abstract

Self-inactivating (SIN) lentiviral vectors (LV) have an excellent therapeutic potential as demonstrated in preclinical studies and clinical trials. However, weaker mechanisms of insertional mutagenesis could still pose a significant risk in clinical applications. Taking advantage of novel in vivo genotoxicity assays, we tested a battery of LV constructs, including some with clinically relevant designs, and found that oncogene activation by promoter insertion is the most powerful mechanism of early vector-induced oncogenesis. SIN LVs disabled in their capacity to activate oncogenes by promoter insertion were less genotoxic and induced tumors by enhancer-mediated activation of oncogenes with efficiency that was proportional to the strength of the promoter used. On the other hand, when enhancer activity was reduced by using moderate promoters, oncogenesis by inactivation of tumor suppressor gene was revealed. This mechanism becomes predominant when the enhancer activity of the internal promoter is shielded by the presence of a synthetic chromatin insulator cassette. Our data provide both mechanistic insights and quantitative readouts of vector-mediated genotoxicity, allowing a relative ranking of different vectors according to these features, and inform current and future choices of vector design with increasing biosafety.

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Crossref · 10.1038/mt.2014.3

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  • In a mouse model of clinically relevant SIN lentiviral vectors, the genotoxic potential of lentiviral vectors can be diminished by the inclusion of an engineered chromatin insulator cassette.

    “and a mouse model of clinically relevant SIN lentiviral vectors showed that the genotoxic potential of lentiviral vectors can be diminished by the inclusion of an engineered chromatin insulator cassette [58].”

    From Clinical use of lentiviral vectors (2018) · cites this paper as [58]

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Authors
Cesana, D., Ranzani, M., Volpin, M., Bartholomae, C., Duros, C., Artus, A., Merella, S., Benedicenti, F., Sergi Sergi, L., Sanvito, F., Brombin, C., Nonis, A., Serio, C. D., Doglioni, C., von Kalle, C., Schmidt, M., Cohen-Haguenauer, O., Naldini, L., & Montini, E.
Affiliations
  • The San Raffaele Telethon Institute for Gene Therapy (IT)
  • Vita-Salute San Raffaele University (IT)
  • German Cancer Research Center (DE)
  • École Normale Supérieure Paris-Saclay (FR)
  • IRCCS Ospedale San Raffaele (IT)
Corresponding author
Montini, Eugenio
Venue
Molecular Therapy
Publisher
Elsevier BV
Published
2014-04
Volume
22
Issue
4
Pages
774-785
ISSN
1525-0016 (ISSN-L)
OpenAlex
W2003934533
Cited by
189
References
51
Citations by year
2026: 13 · 2025: 17 · 2024: 14 · 2023: 16 · 2022: 9 · 2021: 13 · 2020: 16 · 2019: 16 · 2018: 11 · 2017: 16 · 2016: 21 · 2015: 11 · 2014: 13
FWCI
13.35
Type
journal article
Language
en
Open access
Locations
  • Molecular Therapy (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Archivio Istituzionale della Ricerca - Università Vita-Salute San Raffaele (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Virus-based gene therapy research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › CRISPR and Genetic Engineering
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
Keywords
self-inactivating lentiviral vectors, genotoxicity, insertional mutagenesis, oncogene activation, promoter insertion, tumor suppressor inactivation, chromatin insulators, vector design, biosafety
MeSH terms
Genetic Vectors, Humans, Promoter Regions, Genetic, Genetic Therapy, Lentivirus, Mutagenesis, Insertional, Carcinogenesis

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