3D Visualization of Immune Cell Populations in HIV-Infected Tissues via Clearing, Immunostaining, Confocal, and Light...

Area of Science:

• Virology
• Immunology
• Biotechnology

Background:

• Human Immunodeficiency Virus (HIV) infection affects millions globally, with no cure.
• Understanding HIV-host interactions in tissues is crucial for developing effective therapies.
• Current methods lack detailed spatial resolution of these interactions within intact tissues.

Purpose of the Study:

• To apply water-based tissue clearing techniques for visualizing HIV-host cell interactions in intact tissues.
• To enable detailed spatial reconstruction and quantification of immune responses during HIV infection.
• To demonstrate the broad applicability of these methods for infectious diseases and other research areas.

Main Methods:

• Utilized CUBIC (Clear, Unobstructed Brain/Body Imaging Cocktails and Computational analysis) and CLARITY (Clear Lipid-exchanged Acrylamide-hybridized Rigid Imaging/Immunostaining/in situ-hybridization-compatible Tissue hYdrogel) tissue clearing techniques.
• Employed confocal and light sheet fluorescence microscopy for high-resolution imaging of cleared tissues.
• Performed optical sectioning and image analysis for spatial reconstruction and immune cell quantification.

Main Results:

• Successfully visualized complex HIV-host cell interactions within intact animal and human tissues.
• Enabled detailed spatial mapping of viral distribution and immune cell populations.
• Demonstrated the ability to reconstruct and analyze spatial information from whole tissues.

Conclusions:

• CUBIC and CLARITY techniques provide unprecedented spatial insights into HIV-host interactions in tissues.
• These methods significantly advance the study of infectious diseases by allowing detailed analysis of cellular dynamics.
• The techniques are versatile and applicable to a wide range of biological questions beyond HIV research, including cancer.