Imaging lymphoid tissues in nonhuman primates to understand SIV pathogenesis and persistence

Area of Science:

• Immunology
• Virology
• Pathogenesis

Background:

• CD4+ T cells are the primary targets of HIV-1, predominantly residing in lymphoid tissues.
• HIV-1 infection, replication, and immune responses occur within these critical immune system compartments.
• Studying HIV-1 pathogenesis in human tissues presents significant ethical and practical challenges.

Purpose of the Study:

• To review current methods for studying tissue-based immunopathogenesis of AIDS virus infection in nonhuman primates (NHPs).
• To highlight the utility of NHP models for understanding HIV-1 infection dynamics.
• To explore approaches for monitoring HIV-1 disease in clinical settings.

Main Methods:

• Analysis of tissues from NHP biopsies and necropsies.
• Application of non-invasive imaging techniques.
• Experimental simian immunodeficiency virus (SIV) infection in NHPs.

Main Results:

• NHP models provide a bridge for studying HIV-1 pathogenesis, offering insights not feasible in humans.
• Tissue analysis and imaging are key approaches to understanding SIV/HIV-1 infection in vivo.
• These methods aid in understanding viral reservoirs and host immune responses.

Conclusions:

• Nonhuman primate models are essential for dissecting the tissue-level immunopathogenesis of HIV-1.
• Combining tissue analysis with non-invasive imaging enhances understanding of AIDS virus infection.
• Research in NHPs can inform clinical monitoring and therapeutic strategies for HIV-1 disease.