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Exploring DNA damage responses in human cells with recombinant adenoviral vectors
Melissa G Armelini1, Keronninn M Lima-Bessa, Maria Carolina N Marchetto
1Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, SP, Brazil.
Abstract:
Recombinant adenoviral vectors provide efficient means for gene transduction in mammalian cells in vitro and in vivo. We are currently using these vectors to transduce DNA repair genes into repair deficient cells, derived from xeroderma pigmentosum (XP) patients. XP is an autosomal syndrome characterized by a high frequency of skin tumors, especially in areas exposed to sunlight, and, occasionally, developmental and neurological abnormalities. XP cells are deficient in nucleotide excision repair (affecting one of the seven known XP genes, xpa to xpg) or in DNA replication of DNA lesions (affecting DNA polymerase eta, xpv). The adenovirus approach allows the investigation of different consequences of DNA lesions in cell genomes. Adenoviral vectors carrying several xp and photolyases genes have been constructed and successfully tested in cell culture systems and in vivo directly in the skin of knockout model mice. This review summarizes these recent data and proposes the use of recombinant adenoviruses as tools to investigate the mechanisms that provide protection against DNA damage in human cells, as well as to better understand the higher predisposition of XP patients to cancer.
Insights
Recombinant adenoviruses effectively deliver DNA repair genes into cells, aiding research into xeroderma pigmentosum (XP) and cancer predisposition. This technology investigates DNA damage protection mechanisms in human cells.
Area of Science:
- Genetics
- Molecular Biology
- Oncology
Background:
- Xeroderma pigmentosum (XP) is a genetic disorder causing extreme sun sensitivity and high skin cancer rates.
- XP cells exhibit deficiencies in nucleotide excision repair or DNA lesion replication.
- Understanding DNA repair mechanisms is crucial for cancer prevention and treatment.
Purpose of the Study:
- To investigate the use of recombinant adenoviral vectors for gene transduction in XP cells.
- To explore the mechanisms protecting human cells against DNA damage.
- To enhance understanding of XP-associated cancer predisposition.
Main Methods:
- Construction and testing of adenoviral vectors carrying XP and photolyase genes.
- Gene transduction in mammalian cells in vitro and in vivo.
- Utilizing XP patient-derived cells and knockout mouse models.
Main Results:
- Recombinant adenoviral vectors demonstrated efficient gene transduction capabilities.
- Successful testing of vectors in cell culture and in vivo mouse skin models.
- Adenovirus approach facilitates investigation of DNA lesion consequences.
Conclusions:
- Recombinant adenoviruses are valuable tools for studying DNA repair and damage response.
- This technology can elucidate mechanisms of cancer predisposition in XP patients.
- Further research using adenoviral vectors can advance therapeutic strategies for DNA repair deficiencies.
