Capacity for infectious HIV-1 virion capture differs by envelope antibody specificity

Area of Science:

• Virology
• Immunology
• Vaccinology

Background:

• Antibody recognition of infectious virions is crucial for antiviral defense.
• Understanding antibody specificity is key to developing effective vaccines.

Purpose of the Study:

• To quantify the ability of different antibodies to capture infectious virions.
• To assess the potential of antibody combinations for enhanced viral recognition.

Main Methods:

• Determination of the infectious virion capture index (IVCI) for various antibody specificities.
• Analysis of antibody capture of both infectious and non-infectious virions.

Main Results:

• Broadly neutralizing antibodies (bNAbs) primarily captured infectious virions.
• Non-bNAbs and human immunodeficiency virus type 1 (HIV-1)-positive IgG captured both infectious and non-infectious virions.
• Infectious virion capture was additive when using antibody mixtures.

Conclusions:

• Antibody specificity dictates the selective capture of infectious virions.
• Additive capture by antibody mixtures demonstrates potential for vaccine-induced responses with improved infectious virion recognition.