Format

Send to

Choose Destination
Proc Natl Acad Sci U S A. 2017 Jan 24;114(4):E570-E579. doi: 10.1073/pnas.1615422114. Epub 2017 Jan 9.

A paradox of transcriptional and functional innate interferon responses of human intestinal enteroids to enteric virus infection.

Author information

1
Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030.
2
Department of Human and Molecular Genetics, Baylor College of Medicine, Houston, TX 77030.
3
Department of Medicine, Gastroenterology Division, Johns Hopkins University School of Medicine, Baltimore, MD 21205.
4
Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030; mestes@bcm.tmc.edu.

Abstract

The intestinal epithelium can limit enteric pathogens by producing antiviral cytokines, such as IFNs. Type I IFN (IFN-α/β) and type III IFN (IFN-λ) function at the epithelial level, and their respective efficacies depend on the specific pathogen and site of infection. However, the roles of type I and type III IFN in restricting human enteric viruses are poorly characterized as a result of the difficulties in cultivating these viruses in vitro and directly obtaining control and infected small intestinal human tissue. We infected nontransformed human intestinal enteroid cultures from multiple individuals with human rotavirus (HRV) and assessed the host epithelial response by using RNA-sequencing and functional assays. The dominant transcriptional pathway induced by HRV infection is a type III IFN-regulated response. Early after HRV infection, low levels of type III IFN protein activate IFN-stimulated genes. However, this endogenous response does not restrict HRV replication because replication-competent HRV antagonizes the type III IFN response at pre- and posttranscriptional levels. In contrast, exogenous IFN treatment restricts HRV replication, with type I IFN being more potent than type III IFN, suggesting that extraepithelial sources of type I IFN may be the critical IFN for limiting enteric virus replication in the human intestine.

KEYWORDS:

enteric virus; human enteroids; human rotavirus; interferon

PMID:
28069942
PMCID:
PMC5278484
DOI:
10.1073/pnas.1615422114
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for HighWire Icon for PubMed Central
Loading ...
Support Center