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Pairwise Growth Competition Assay for Determining the Replication Fitness of Human Immunodeficiency Viruses
Published on: May 4, 2015
Development of single-cycle replicable human immunodeficiency virus 1 mutants
R Zabihollahi1, S M Sadat, R Vahabpour
1Hepatitis and AIDS Department, Pasteur Institute of Iran, Tehern, Iran.
Acta Virologica
|March 26, 2011
Summary
Researchers developed single-cycle replicable (SCR) human immunodeficiency virus 1 (HIV-1) virions. These non-infectious yet antigenic HIV-1 SCR particles offer enhanced biological safety for HIV research and potential vaccine development.
Area of Science:
- Virology
- Immunology
- Molecular Biology
Background:
- Non-infectious, antigenic human immunodeficiency virus 1 (HIV-1) particles are crucial for research.
- Current research tools may pose safety concerns or lack broad applicability.
Purpose of the Study:
- To construct and characterize novel single-cycle replicable (SCR) HIV-1 virions.
- To evaluate the utility of these SCR virions for HIV-1 research and vaccine development.
Main Methods:
- Constructed a plasmid with a mutated HIV-1 pol gene, co-transfected with plasmids expressing pol gene products (reverse transcriptase, integrase) and VSV-G.
- Produced SCR virions in HEK 293 T cells.
- Assessed SCR virion replication in HEK 293T, MT-2, and mouse spleen cells using p24-capture ELISA, syncytium formation assay, and electron microscopy.
Main Results:
- Generated antigenic, first-generation SCR virions capable of single-cycle replication.
- VSV-G incorporation broadened the spectrum of susceptible cell types for SCR replication.
- HEK 293T and MT-2 cells showed efficient replication, while mouse spleen cells were less effective.
- Second-generation SCR virions produced from MT-2 cells were non-infectious.
Conclusions:
- HIV-1 SCR virions provide a safer and effective tool for HIV-1 research.
- The antigenic nature and limited replication of SCR virions make them promising candidates for HIV vaccine studies.
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