Recombinant Retrovirus
Recombinant Retrovirus - Related Videos
02:33
Retroviruses
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2020
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’...
04:58
Microinjection of Recombinant RCAS(A) Retrovirus into Embryonic Chicken Lens
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Cited by 1 •
2023
This protocol paper describes the methodology of embryonic chicken lens microinjection of an RCAS(A) retrovirus as a tool for studying in situ function and expression of proteins during lens development.
04:07
Genetic Modification of Primary Human Keratinocytes: A Method for Genetically Manipulating Keratinocytes Using Recombinant Retroviruses
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2023
This video describes a detailed protocol for producing genetically modified primary human keratinocytes recombinant retrovirus. This method can be used to manipulate gene expression in keratinocytes.
01:51
Mechanisms of Retrovirus-induced Cancers
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2021
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...
01:10
Retrovirus Life Cycles
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2019
Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the retrovirus to...
FAQs
The transfer vector carries the selected transgene, whereas essential packaging functions are supplied separately during particle production. This arrangement allows viral particles to be assembled without placing all replication-related functions in the same genetic construct. The resulting particles can deliver the intended sequence while remaining replication-defective, a design feature that supports controlled experimentation and safety evaluation.
After entry, reverse transcriptase converts the viral RNA genome into DNA. Integrase then inserts that DNA into a chromosome of the target cell. This chromosomal insertion can support relatively stable expression, particularly in dividing cells, because the introduced sequence becomes associated with the host genetic material. The two enzyme-driven steps therefore determine the persistence of the delivered sequence.
Integration is useful for stable expression, but it can also alter regulation of genes near the insertion site. That possibility makes vector design and safety testing essential rather than optional. Researchers must consider how the transferred sequence and its integration could affect host-cell gene regulation when evaluating experimental results or therapeutic applications.
Production begins by combining viral components with the selected transgene in a transfer-vector arrangement while keeping essential packaging functions separate. The assembled system generates particles that can enter target cells and deliver the genetic sequence but are replication-defective. This workflow links vector construction to the desired delivery function and provides a basis for subsequent biological testing.
Its applications include functional genomics, where delivered sequences can help investigate gene function, vaccine research, and gene therapy. The same delivery capability serves different goals: experimental studies may examine the consequences of introducing a selected sequence, whereas therapeutic work focuses on delivering a gene of interest. In each case, stable expression and integration must be considered.
A successful experiment can provide target-cell delivery of a selected genetic sequence and relatively stable expression in dividing cells. Interpretation should nevertheless account for integration-related effects, since insertion may alter host gene regulation. For that reason, observed changes should be considered alongside vector design and the safety testing used for the particular application.