Related Experiment Video
Updated: May 22, 2026
09:31
Amplification, Next-generation Sequencing, and Genomic DNA Mapping of Retroviral Integration Sites
Published on: March 22, 2016
Retroviral integration profiles: their determinants and implications for gene therapy
1Department of Medical and Pharmaceutical Sciences, College of Science, Sookmyung Women's University, Seoul, Korea. klim@sm.ac.kr
BMB Reports
|April 26, 2012
Summary
Retroviral gene therapy offers long-term transgene expression but carries cancer risks due to genomic integration. Research now focuses on understanding and controlling retroviral integration for safer gene therapy vectors.
Area of Science:
- Molecular Biology
- Virology
- Gene Therapy
Background:
- Retroviruses are utilized in gene therapy for stable transgene expression through genomic integration.
- Retroviral integration into the host genome can lead to oncogenesis, as evidenced by leukemia in a gene therapy trial.
- This risk necessitates urgent research into the biological and pathological aspects of retroviral integration.
Purpose of the Study:
- To review recent findings on retroviral integration patterns and determinants.
- To discuss the implications of retroviral integration for gene therapy and infectious diseases.
- To explore strategies for directing retroviral integration to safer genomic loci.
Main Methods:
- Review of current literature on retroviral integration.
- Analysis of global integration patterns across different retroviruses.
- Examination of viral and cellular factors influencing integration site selection.
Main Results:
- Integration patterns vary significantly among different retroviral types.
- Both viral and cellular factors dictate where retroviruses integrate into the host genome.
- Understanding these factors is crucial for mitigating risks associated with gene therapy.
Conclusions:
- A deeper mechanistic understanding of retroviral integration is essential.
- Developing safer retroviral vector platforms is a key future goal.
- Controlling integration site selection will enhance the safety and efficacy of gene therapy.
Related Concept Videos
01:26Size and Structure of Viral Genomes
Viral genomes exhibit remarkable diversity in size, structure, and composition, influencing their replication strategies and interactions with host cells. These genomes consist of either DNA or RNA and may be linear or circular. Additionally, they can be single-stranded or double-stranded, with each configuration affecting how the virus propagates within a host. RNA viruses, for instance, generally have smaller genomes than DNA viruses, a factor that contributes to their high mutation rates and...
01:51Mechanisms of Retrovirus-induced Cancers
Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...
01:51Mechanisms of Retrovirus-induced Cancers
Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...
02:33Retroviruses
Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
00:59Gene Therapy
Gene therapy is a technique where a gene is inserted into a person’s cells to prevent or treat a serious disease. The added gene may be a healthy version of the gene that is mutated in the patient, or it could be a different gene that inactivates or compensates for the patient’s disease-causing gene. For example, in patients with severe combined immunodeficiency (SCID) due to a mutation in the gene for the enzyme adenosine deaminase, a functioning version of the gene can be inserted. The...
00:59Gene Therapy
Gene therapy is a technique where a gene is inserted into a person’s cells to prevent or treat a serious disease. The added gene may be a healthy version of the gene that is mutated in the patient, or it could be a different gene that inactivates or compensates for the patient’s disease-causing gene. For example, in patients with severe combined immunodeficiency (SCID) due to a mutation in the gene for the enzyme adenosine deaminase, a functioning version of the gene can be inserted. The...