1. Pan-viral Antibody Repertoire of Aqueous Humor in Cytomegalovirus Uveitis.
- Author
-
Tiu CK, Chia WN, Anderson DE, Chee SP, Wang LF, and Siak J
- Subjects
- Humans, Prospective Studies, Female, Male, Middle Aged, Aged, Case-Control Studies, Adult, Uveitis, Anterior immunology, Uveitis, Anterior virology, Uveitis, Anterior diagnosis, DNA, Viral analysis, Polymerase Chain Reaction, Aged, 80 and over, Aqueous Humor virology, Aqueous Humor immunology, Eye Infections, Viral immunology, Eye Infections, Viral virology, Eye Infections, Viral diagnosis, Antibodies, Viral blood, Antibodies, Viral immunology, Cytomegalovirus immunology, Cytomegalovirus genetics, Cytomegalovirus Infections virology, Cytomegalovirus Infections immunology, Cytomegalovirus Infections diagnosis
- Abstract
Purpose: The identification of infectious etiologies is important in the management of uveitis. Ocular fluid testing is required, but multiplex testing faces challenges due to the limited volume sampled. The determination of antibody repertoire of aqueous humor (AH) is not possible with conventional assays. We investigated the use of a highly multiplexable serological assay VirScan, a Phage ImmunoPrecipitation Sequencing (PhIP-Seq) library derived from the sequences of more than 200 viruses to determine the antibody composition of AH in patients with uveitis., Design: Prospective, case control study., Methods: We analyzed the paired AH and plasma samples of 11 immunocompetent patients with active polymerase chain reaction-positive cytomegalovirus (CMV) anterior uveitis and the AH of 34 control patients undergoing cataract surgery with no known uveitis in an institutional practice. The samples were tested using VirScan PhIP-Seq, and the entire pan-viral antibody repertoire was determined using peptide tile ranking by normalized counts to identify significant antibodies enrichment against all viruses with human tropism., Results: Significant enrichment of antibodies to Herpesviridae, Picornavirdae, and Paramyxoviridae was detectable in 20 µL of AH samples from patients with CMV uveitis and controls. Patients with CMV uveitis had relative enrichment of anti-CMV antibodies in AH compared with their plasma. Epitope-level mapping identified significant enrichment of antibodies against CMV tegument protein pp150 (P = 1.5e-06) and envelope glycoprotein B (P = .0045) in the AH compared with controls., Conclusions: Our proof-of-concept study not only sheds light on the antibody repertoire of AH but also expands the utility of PhIP-Seq to future studies to detect antibodies in AH in the study of inflammatory eye diseases., (Copyright © 2024 Elsevier Inc. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF