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. 2022 Nov 28;226(11):2030-2036.
doi: 10.1093/infdis/jiac350.

DDX58 Is Associated With Susceptibility to Severe Influenza Virus Infection in Children and Adolescents

Affiliations

DDX58 Is Associated With Susceptibility to Severe Influenza Virus Infection in Children and Adolescents

Sanghun Lee et al. J Infect Dis. .

Abstract

Background: Seasonal influenza virus infection causes a range of disease severity, including lower respiratory tract infection with respiratory failure. We evaluated the association of common variants in interferon (IFN) regulatory genes with susceptibility to critical influenza infection in children.

Methods: We performed targeted sequencing of 69 influenza-associated candidate genes in 348 children from 24 US centers admitted to the intensive care unit with influenza infection and lacking risk factors for severe influenza infection (PICFlu cohort, 59.4% male). As controls, whole genome sequencing from 675 children with asthma (CAMP cohort, 62.5% male) was compared. We assessed functional relevance using PICFlu whole blood gene expression levels for the gene and calculated IFN gene signature score.

Results: Common variants in DDX58, encoding the retinoic acid-inducible gene I (RIG-I) receptor, demonstrated association above or around the Bonferroni-corrected threshold (synonymous variant rs3205166; intronic variant rs4487862). The intronic single-nucleotide polymorphism rs4487862 minor allele was associated with decreased DDX58 expression and IFN signature (P < .05 and P = .0009, respectively) which provided evidence supporting the genetic variants' impact on RIG-I and IFN immunity.

Conclusions: We provide evidence associating common gene variants in DDX58 with susceptibility to severe influenza infection in children. RIG-I may be essential for preventing life-threatening influenza-associated disease.

Keywords: DDX58; RIG-I receptor; host genetics; pediatric influenza; susceptibility.

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Conflict of interest statement

Potential conflicts of interest. A. G. R. reports receiving reagents to her institution from Illumina Inc for work outside of this project. All authors have submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Conflicts that the editors consider relevant to the content of the manuscript have been disclosed.

Figures

Figure 1.
Figure 1.
Principal components analysis plot showing adjustment for race (A), quantile–quantile plot (B), and Manhattan plot (C) for generalized logistic regression of 2 cohorts (PICFlu vs CAMP) adjusting for age, sex, and 10 principal components of genetic ancestry under the additive model. The grey dotted line in the Manhattan plot shows a Bonferroni-corrected threshold of .05 (P = 3.90 × 10−5), which only synonymous variant DDX58 rs3205166 exceeds, with intronic DDX58 rs4487862 the dot below it (P = .0016). Abbreviations: AFR, African; CAMP, Childhood Asthma Management Program; EUR, European; LAT, Latino; PC, principal component; PCA, principal components analysis; PICFlu, Pediatric Intensive Care Influenza.
Figure 2.
Figure 2.
DDX58 (retinoic acid–inducible gene I) expression level (A) and interferon gene signature (ISG) score (B) according to genotyping of the DDX58 common variants rs3205166 and rs4487862. **P < .01, ***P < .001; ns, not significant.

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