Gene expression profiling of HIV-1 infection using cDNA microarrays

Area of Science:

• Molecular Biology
• Virology
• Immunology

Background:

• Gene expression profiling is crucial for understanding cellular responses to viral infections.
• Human Immunodeficiency Virus type 1 (HIV-1) infection impacts CD4+ T cell function, necessitating detailed molecular analysis.

Purpose of the Study:

• To illustrate gene expression profiling methods using complementary DNA (cDNA) microarrays.
• To identify gene expression changes associated with in vitro HIV-1 infection in CD4+ T cell lines.

Main Methods:

• Infection of CD4+ T cell lines with HIV-1LAI at high multiplicity of infection.
• Verification of infection status via intracellular gag p24 protein detection using flow cytometry.
• Total RNA extraction, amplification, and quality assessment using Bioanalyzer technology.
• Reverse transcription of amplified RNA to generate fluorescently labeled cDNA probes.
• Hybridization of probes to cDNA microarrays with dye-swap strategy for quality control.

Main Results:

• Successful implementation of cDNA microarray methods for gene expression analysis in HIV-1 infected cells.
• Identification of specific gene expression alterations relevant to the in vitro HIV-1 infection model.
• Demonstration of a robust methodology for comparative gene expression studies.

Conclusions:

• cDNA microarrays provide a powerful tool for dissecting the molecular mechanisms of viral infections.
• The described methods enable reliable identification of host gene expression changes in response to HIV-1.
• This approach facilitates further research into HIV-1 pathogenesis and potential therapeutic targets.