학술논문
PET/CT targeted tissue sampling reveals virus specific dIgA can alter the distribution and localization of HIV after rectal exposure.
Document Type
article
Author
Roslyn A Taylor; Sixia Xiao; Ann M Carias; Michael D McRaven; Divya N Thakkar; Mariluz Araínga; Edward J Allen; Kenneth A Rogers; Sidath C Kumarapperuma; Siqi Gong; Angela J Fought; Meegan R Anderson; Yanique Thomas; Jeffrey R Schneider; Beth Goins; Peter Fox; Francois J Villinger; Ruth M Ruprecht; Thomas J Hope
Source
PLoS Pathogens, Vol 17, Iss 6, p e1009632 (2021)
Subject
Language
English
ISSN
1553-7366
1553-7374
1553-7374
Abstract
Human immunodeficiency virus (HIV) vaccines have not been successful in clinical trials. Dimeric IgA (dIgA) in the form of secretory IgA is the most abundant antibody class in mucosal tissues, making dIgA a prime candidate for potential HIV vaccines. We coupled Positron Emission Tomography (PET) imaging and fluorescent microscopy of 64Cu-labeled, photoactivatable-GFP HIV (PA-GFP-BaL) and fluorescently labeled dIgA to determine how dIgA antibodies influence virus interaction with mucosal barriers and viral penetration in colorectal tissue. Our results show that HIV virions rapidly disseminate throughout the colon two hours after exposure. The presence of dIgA resulted in an increase in virions and penetration depth in the transverse colon. Moreover, virions were found in the mesenteric lymph nodes two hours after viral exposure, and the presence of dIgA led to an increase in virions in mesenteric lymph nodes. Taken together, these technologies enable in vivo and in situ visualization of antibody-virus interactions and detailed investigations of early events in HIV infection.