Fcγ Receptor IIa Polymorphism Is Associated With Severe Respiratory Syncytial Virus Disease in Argentinian Infants

Overview

Journal Front Cell Infect Microbiol

Specialties Cell Biology
Infectious Diseases
Microbiology

Date 2021 Jan 4

PMID 33392111

Citations 1

Authors

Maria Pia Holgado

Silvina Raiden

Ines Sananez

Vanesa Seery

Leonardo De Lillo

Lucas L Maldonado

Laura Kamenetzky

Jorge Geffner

Lourdes Arruvito

Affiliations

Soon will be listed here.

Abstract

Background: Most patients with respiratory syncytial virus (RSV) infection requiring hospitalization have no risk factors for severe disease. Genetic variation in the receptor for the Fc portion of IgG (FcγR) determines their affinity for IgG subclasses driving innate and adaptive antiviral immunity. We investigated the relationship between FcγRIIa-H131R polymorphism and RSV disease.

Methods: Blood samples were collected from 182 infants ≤24-month-old (50 uninfected, 114 RSV-infected with moderate course and 18 suffering severe disease). FcγRIIa-H131R SNP genotypic frequencies (HH, HR, RR) and anti-RSV IgG1, IgG2 and IgG3 levels were studied.

Results: Genotypic frequencies for FcγRIIa-H131R SNP were comparable between uninfected and RSV-infected infants. In contrast, we found a significant higher frequency of HH genotype in severe RSV-infected children compared to moderate patients. Among severe group, HH infants presented more factors associated to severity than HR or RR patients did. Furthermore, compared to moderate RSV-infected infants, severe patients showed higher levels of anti-RSV IgG1 and IgG3.

Conclusions: We found an association between an FcγRIIa (H131) polymorphism and severe RSV disease, which points towards a critical role for interactions between FcγRs and immune complexes in RSV pathogenesis. This genetic factor could also predict the worse outcome and identify those infants at risk during hospitalization.

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