Assessment of genetic associations between common single nucleotide polymorphisms in RIG-I-like receptor and IL-4 signaling genes and severe respiratory syncytial virus infection in children: a candidate gene case-control study.
The majority of cases of severe pediatric respiratory syncytial virus (RSV) infection occur in otherwise healthy infants who have no identifiable risk factors, suggesting that additional subclinical factors, such as population genetic variation, influence the course of RSV infection. The objective o...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2014-01-01
|
| Series: | PLoS ONE |
| Online Access: | https://doi.org/10.1371/journal.pone.0100269 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849331098047217664 |
|---|---|
| author | Nico Marr Aaron F Hirschfeld Angie Lam Shirley Wang Pascal M Lavoie Stuart E Turvey |
| author_facet | Nico Marr Aaron F Hirschfeld Angie Lam Shirley Wang Pascal M Lavoie Stuart E Turvey |
| author_sort | Nico Marr |
| collection | DOAJ |
| description | The majority of cases of severe pediatric respiratory syncytial virus (RSV) infection occur in otherwise healthy infants who have no identifiable risk factors, suggesting that additional subclinical factors, such as population genetic variation, influence the course of RSV infection. The objective of this study was to test if common single nucleotide polymorphisms (SNPs) in genes encoding for immune signalling components of the RIG-I-like receptor (RLR) and IL-4-signalling pathways affect the outcome of RSV infection in early life. We genotyped 8 SNPs using allele-specific probes combined with real-time PCR. Each of the SNPs tested had previously been established to have a functional impact on immune responsiveness and two of the SNPs in the IL4 and IL4R genes had previously been associated with severe RSV bronchiolitis. Association with susceptibility to severe RSV infection was tested by statistically comparing genotype and allele frequencies in infants and young children hospitalized with severe RSV bronchiolitis (n = 140) with two control groups-children who tested positive for RSV but did not require hospitalization (n = 100), and a general population control group (n = 285). Our study was designed with sufficient power (>80%) to detect clinically-relevant associations with effect sizes ≥1.5. However, we detected no statistically significant differences in allele and genotype frequencies of the investigated SNPs between the inpatient and control groups. To conclude, we could not replicate the previously reported association with SNPs in the IL4 and IL4R genes in our independent cohort, nor did we find that common SNPs in genes encoding for RLRs and the downstream adapter MAVS were associated with susceptibility to severe RSV infections. Despite the existing evidence demonstrating a functional immunological impact of these SNPs, our data suggest that the biological effect of each individual SNP is unlikely to affect clinical outcomes of RSV infection. |
| format | Article |
| id | doaj-art-8f4ae0fbf31f4ea9b980e02a0116d54e |
| institution | Kabale University |
| issn | 1932-6203 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj-art-8f4ae0fbf31f4ea9b980e02a0116d54e2025-08-20T03:46:43ZengPublic Library of Science (PLoS)PLoS ONE1932-62032014-01-0196e10026910.1371/journal.pone.0100269Assessment of genetic associations between common single nucleotide polymorphisms in RIG-I-like receptor and IL-4 signaling genes and severe respiratory syncytial virus infection in children: a candidate gene case-control study.Nico MarrAaron F HirschfeldAngie LamShirley WangPascal M LavoieStuart E TurveyThe majority of cases of severe pediatric respiratory syncytial virus (RSV) infection occur in otherwise healthy infants who have no identifiable risk factors, suggesting that additional subclinical factors, such as population genetic variation, influence the course of RSV infection. The objective of this study was to test if common single nucleotide polymorphisms (SNPs) in genes encoding for immune signalling components of the RIG-I-like receptor (RLR) and IL-4-signalling pathways affect the outcome of RSV infection in early life. We genotyped 8 SNPs using allele-specific probes combined with real-time PCR. Each of the SNPs tested had previously been established to have a functional impact on immune responsiveness and two of the SNPs in the IL4 and IL4R genes had previously been associated with severe RSV bronchiolitis. Association with susceptibility to severe RSV infection was tested by statistically comparing genotype and allele frequencies in infants and young children hospitalized with severe RSV bronchiolitis (n = 140) with two control groups-children who tested positive for RSV but did not require hospitalization (n = 100), and a general population control group (n = 285). Our study was designed with sufficient power (>80%) to detect clinically-relevant associations with effect sizes ≥1.5. However, we detected no statistically significant differences in allele and genotype frequencies of the investigated SNPs between the inpatient and control groups. To conclude, we could not replicate the previously reported association with SNPs in the IL4 and IL4R genes in our independent cohort, nor did we find that common SNPs in genes encoding for RLRs and the downstream adapter MAVS were associated with susceptibility to severe RSV infections. Despite the existing evidence demonstrating a functional immunological impact of these SNPs, our data suggest that the biological effect of each individual SNP is unlikely to affect clinical outcomes of RSV infection.https://doi.org/10.1371/journal.pone.0100269 |
| spellingShingle | Nico Marr Aaron F Hirschfeld Angie Lam Shirley Wang Pascal M Lavoie Stuart E Turvey Assessment of genetic associations between common single nucleotide polymorphisms in RIG-I-like receptor and IL-4 signaling genes and severe respiratory syncytial virus infection in children: a candidate gene case-control study. PLoS ONE |
| title | Assessment of genetic associations between common single nucleotide polymorphisms in RIG-I-like receptor and IL-4 signaling genes and severe respiratory syncytial virus infection in children: a candidate gene case-control study. |
| title_full | Assessment of genetic associations between common single nucleotide polymorphisms in RIG-I-like receptor and IL-4 signaling genes and severe respiratory syncytial virus infection in children: a candidate gene case-control study. |
| title_fullStr | Assessment of genetic associations between common single nucleotide polymorphisms in RIG-I-like receptor and IL-4 signaling genes and severe respiratory syncytial virus infection in children: a candidate gene case-control study. |
| title_full_unstemmed | Assessment of genetic associations between common single nucleotide polymorphisms in RIG-I-like receptor and IL-4 signaling genes and severe respiratory syncytial virus infection in children: a candidate gene case-control study. |
| title_short | Assessment of genetic associations between common single nucleotide polymorphisms in RIG-I-like receptor and IL-4 signaling genes and severe respiratory syncytial virus infection in children: a candidate gene case-control study. |
| title_sort | assessment of genetic associations between common single nucleotide polymorphisms in rig i like receptor and il 4 signaling genes and severe respiratory syncytial virus infection in children a candidate gene case control study |
| url | https://doi.org/10.1371/journal.pone.0100269 |
| work_keys_str_mv | AT nicomarr assessmentofgeneticassociationsbetweencommonsinglenucleotidepolymorphismsinrigilikereceptorandil4signalinggenesandsevererespiratorysyncytialvirusinfectioninchildrenacandidategenecasecontrolstudy AT aaronfhirschfeld assessmentofgeneticassociationsbetweencommonsinglenucleotidepolymorphismsinrigilikereceptorandil4signalinggenesandsevererespiratorysyncytialvirusinfectioninchildrenacandidategenecasecontrolstudy AT angielam assessmentofgeneticassociationsbetweencommonsinglenucleotidepolymorphismsinrigilikereceptorandil4signalinggenesandsevererespiratorysyncytialvirusinfectioninchildrenacandidategenecasecontrolstudy AT shirleywang assessmentofgeneticassociationsbetweencommonsinglenucleotidepolymorphismsinrigilikereceptorandil4signalinggenesandsevererespiratorysyncytialvirusinfectioninchildrenacandidategenecasecontrolstudy AT pascalmlavoie assessmentofgeneticassociationsbetweencommonsinglenucleotidepolymorphismsinrigilikereceptorandil4signalinggenesandsevererespiratorysyncytialvirusinfectioninchildrenacandidategenecasecontrolstudy AT stuarteturvey assessmentofgeneticassociationsbetweencommonsinglenucleotidepolymorphismsinrigilikereceptorandil4signalinggenesandsevererespiratorysyncytialvirusinfectioninchildrenacandidategenecasecontrolstudy |