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Retrovirus Life Cycles

Retrovirus Life Cycles

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...

Retroviruses

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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’...

Mechanisms of Retrovirus-induced Cancers

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Related Experiment Video

Updated: Jul 10, 2026

Amplifying and Quantifying HIV-1 RNA in HIV Infected Individuals with Viral Loads Below the Limit of Detection by Standard Clinical Assays

Amplifying and Quantifying HIV-1 RNA in HIV Infected Individuals with Viral Loads Below the Limit of Detection by Standard Clinical Assays

Published on: September 26, 2011

Human retroviruses in the second decade: a personal perspective

¹Laboratory of Tumor Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892-4255, USA.

Nature Medicine

|August 1, 1995

Summary

Human retroviruses cause diverse diseases like AIDS and cancers. Future research must focus on eradicating these viruses and treating infected individuals.

Area of Science:

Virology
Immunology
Infectious Diseases

Background:

Human retroviruses employ sophisticated strategies for replication and persistence.
These viruses are implicated in a wide spectrum of human pathologies, including Acquired Immunodeficiency Syndrome (AIDS), various cancers, and neurological and inflammatory conditions.

Purpose of the Study:

To shift the research paradigm from characterization to active eradication and treatment of human retroviruses.
To address the significant disease burden caused by human retroviral infections.

Main Methods:

Review of existing research on human retrovirus characterization, disease linkage, and mechanisms.
Identification of knowledge gaps and opportunities for therapeutic and eradication strategies.

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Microarray-based Identification of Individual HERV Loci Expression: Application to Biomarker Discovery in Prostate Cancer

Microarray-based Identification of Individual HERV Loci Expression: Application to Biomarker Discovery in Prostate Cancer

Published on: November 2, 2013

Amplification, Next-generation Sequencing, and Genomic DNA Mapping of Retroviral Integration Sites

Amplification, Next-generation Sequencing, and Genomic DNA Mapping of Retroviral Integration Sites

Published on: March 22, 2016

Related Experiment Videos

Last Updated: Jul 10, 2026

Amplifying and Quantifying HIV-1 RNA in HIV Infected Individuals with Viral Loads Below the Limit of Detection by Standard Clinical Assays

Amplifying and Quantifying HIV-1 RNA in HIV Infected Individuals with Viral Loads Below the Limit of Detection by Standard Clinical Assays

Published on: September 26, 2011

Microarray-based Identification of Individual HERV Loci Expression: Application to Biomarker Discovery in Prostate Cancer

Microarray-based Identification of Individual HERV Loci Expression: Application to Biomarker Discovery in Prostate Cancer

Published on: November 2, 2013

Amplification, Next-generation Sequencing, and Genomic DNA Mapping of Retroviral Integration Sites

Amplification, Next-generation Sequencing, and Genomic DNA Mapping of Retroviral Integration Sites

Published on: March 22, 2016

Main Results:

Human retroviruses are responsible for a broad range of severe human diseases.
Current understanding of retroviral mechanisms is substantial but requires translation into clinical applications.

Conclusions:

The focus of human retrovirus research needs to transition towards developing effective eradication therapies.
Improved treatments for individuals infected with human retroviruses are urgently required.