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A differential host response to viral infection defines a subset of earlier-onset diverticulitis patients.


ABSTRACT:

Background and aims

Diverticulitis is the chronic inflammation of diverticula. Whether the pathophysiology of earlier-onset patients differs from later-onset patients is unknown. We profiled the colonic transcriptomes of these two patient populations to gain insight into the molecular underpinnings of diverticulitis.

Methods

We conducted deep RNA sequencing (RNA-seq) on colonic segments surgically resected from earlier-onset (<42 years old, n=13) and later-onset (>65 years old, n=13) diverticulitis patients. We used bioinformatic approaches to cluster the patients based on the relationship of differentially expressed genes and to inform on the molecular pathways that segregated the clusters.

Results

Principal component analysis identified three patient clusters; diverticulitis later-onset (DVT-LO), diverticulitis mixed-onset (DVT-MO), and diverticulitis earlier-onset (DVT-EO). The patients comprising DVT-EO, which was the majority of earlier-onset patients, displayed increased expression of anti-viral response genes. This finding was confirmed using an independent weighted co-expression network analysis (WGCNA) of differentially expressed genes.

Conclusions

We found that the majority of patients with earlier-onset disease contained elevated expression of host genes involved in the anti-viral response. Thus, susceptibility to a viral pathogen may offer one explanation why some individuals develop diverticulitis at an earlier age.

SUBMITTER: Schieffer KM 

PROVIDER: S-EPMC6340102 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature

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Publications

A differential host response to viral infection defines a subset of earlier-onset diverticulitis patients.

Schieffer Kathleen M KM   Kline Bryan P BP   Harris Leonard R LR   Deiling Sue S   Koltun Walter A WA   Yochum Gregory S GS  

Journal of gastrointestinal and liver diseases : JGLD 20180901 3


<h4>Background and aims</h4>Diverticulitis is the chronic inflammation of diverticula. Whether the pathophysiology of earlier-onset patients differs from later-onset patients is unknown. We profiled the colonic transcriptomes of these two patient populations to gain insight into the molecular underpinnings of diverticulitis.<h4>Methods</h4>We conducted deep RNA sequencing (RNA-seq) on colonic segments surgically resected from earlier-onset (<42 years old, n=13) and later-onset (>65 years old, n=  ...[more]

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