Transcriptome Sequencing of Peripheral Blood Mononuclear Cells from Elite Controller-Long Term Non Progressors

Area of Science:

• Immunology
• Virology
• Genetics

Background:

• Elite controllers (EC) and long-term non-progressors (LTNP) represent a natural model for controlling HIV-1 without antiretroviral therapy.
• Understanding the molecular mechanisms behind spontaneous HIV-1 control is crucial for developing new therapeutic strategies.

Purpose of the Study:

• To identify key genes and biological pathways associated with spontaneous HIV-1 control in EC-LTNP.
• To compare the transcriptomic profiles of EC-LTNP with other HIV-1 disease progression phenotypes.

Main Methods:

• RNA sequencing of peripheral blood mononuclear cells (PBMCs) from different HIV-1 disease phenotypes.
• Transcript abundance estimation and supervised classification algorithms to identify predictive genes.
• Differential gene expression analysis to uncover molecular differences between phenotypes.

Main Results:

• Identified 20 genes and pseudogenes, primarily involved in interferon-regulated antiviral mechanisms and transcription/translation, as predictive of HIV-1 disease progression.
• Observed altered calcium homeostasis in EC-LTNP, with upregulated calcium-signaling pathways and NFAT1/Elk-1 binding sites.
• Found coordinated upregulation of host genes supporting HIV-1 reverse transcription and transcription (e.g., p21/CDKN1A, TNF, IER3, GADD45B) in EC-LTNP.

Conclusions:

• Specific gene expression profiles, including interferon responses and calcium signaling, characterize spontaneous HIV-1 control in EC-LTNP.
• These findings highlight potential therapeutic targets for enhancing HIV-1 control in individuals with progressive disease.