Retrovirus Injection
Retrovirus Injection - 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’...
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...
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...
01:51
Mechanisms of Retrovirus-induced Cancers
0 Views •
2023
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...
09:40
Production of Replication-Defective Retrovirus by Transient Transfection of 293T cells
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Cited by 16 •
2007
This technique demonstrates an efficient way to prepare replication-defective retroviral stocks encoding a human oncogene, and subsequently used for induction of myeloproliferative disease in the mouse model.
FAQs
Once a retroviral particle enters a target cell, its RNA is reverse-transcribed into DNA. That DNA can become a provirus by integrating into the host genome, allowing the inserted sequence to remain associated with the cell as it maintains relatively stable expression. This persistence makes the technique useful for examining longer-term effects of altered gene activity in cancer models.
Integration can maintain expression of an inserted gene, which helps researchers assess sustained changes in proliferation, survival, invasion, or treatment response. However, the provirus may disrupt host genes at its integration site. Consequently, interpreting results requires attention to vector design and the possibility that integration itself, rather than the intended genetic change alone, contributes to a cellular phenotype.
Vector design determines which selected genetic material is delivered and shapes how the resulting cell model can be interpreted. Because the delivered sequence may integrate into the host genome, design decisions must also account for possible disruption of host genes. Careful construction therefore supports more focused tests of oncogenes or tumor-suppressor genes while reducing avoidable confounding effects.
Planning should follow the delivery process from particle introduction into target cells through cellular entry, RNA reverse transcription, DNA formation, and possible genomic integration. Researchers then evaluate the consequences of the inserted gene in the modified cells. This sequence clarifies why both delivery success and the biological effects of stable gene activity matter when interpreting cancer experiments.
It is useful when researchers need engineered cells in which a selected gene remains active sufficiently to examine its functional effects. Such models can test how oncogenes or tumor-suppressor genes influence cancer-related behaviors, including proliferation, survival, invasion, and response to treatment. The approach therefore connects a defined genetic alteration with measurable cellular outcomes in a controlled research system.
Researchers can introduce selected genetic material and compare the resulting cellular behavior with an appropriate unmodified or differently modified model. Changes in proliferation, survival, invasion, or treatment response can then provide functional evidence about the gene's role. Interpretation should include biosafety controls and consideration of integration-related effects, since genomic insertion may influence host gene activity as well.