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Global Cytokine Profiles and Association With Clinical Characteristics in Patients With Irritable Bowel Syndrome

Artikel i vetenskaplig tidskrift
Författare Sean Bennet
Annikka Polster
Hans Törnblom
Stefan Isaksson
S. Capronnier
A. Tessier
B. Le Neve
Magnus Simrén
Lena Öhman
Publicerad i American Journal of Gastroenterology
Volym 111
Nummer/häfte 8
Sidor 1165-1176
ISSN 0002-9270
Publiceringsår 2016
Publicerad vid Institutionen för biomedicin, avdelningen för mikrobiologi och immunologi
Institutionen för medicin, avdelningen för invärtesmedicin och klinisk nutrition
Sidor 1165-1176
Språk en
Länkar dx.doi.org/10.1038/ajg.2016.223
Ämnesord regulatory t-cells, visceral hypersensitivity, immune activation, symptoms, ibs, system, inflammation, metaanalysis, sensitivity, disorders, Gastroenterology & Hepatology
Ämneskategorier Klinisk medicin

Sammanfattning

OBJECTIVES: Evidence suggests that patients with irritable bowel syndrome (IBS) have an altered cytokine profile, although it is unclear whether cytokines are linked with symptom severity. We aimed to determine whether global serum and mucosal cytokine profiles differ between IBS patients and healthy subjects and whether cytokines are associated with IBS symptoms. METHODS: Serum from 144 IBS patients and 42 healthy subjects was analyzed for cytokine levels of interleukin (IL)-5, IL-6, IL-8, IL-10, IL-12p70, IL-13, IL-17A, interferon (IFN)-gamma and tumor necrosis factor (TNF) by MSD MULTI-ARRAY. In total, 109 IBS and 36 healthy sigmoid colon biopsies were analyzed for mRNA expression of IL-8, IL-10, TNF, and FOXP3 by quantitative reverse transcription PCR. Multivariate discrimination analysis evaluated global cytokine profiles. Rectal sensitivity, oroanal transit time, and psychological and gastrointestinal symptom severity were also assessed. RESULTS: Global cytokine profiles of IBS patients and healthy subjects overlapped, but cytokine levels varied more in IBS patients. Serum levels of IL-6 and IL-8 tended to be increased and levels of IFN-gamma tended to be decreased in IBS patients. Mucosal mRNA expression of IL-10 and FOXP3 tended to be decreased in IBS patients. Within both the full study cohort and IBS patients alone, serum level of TNF was associated with looser stool pattern, while subjects with more widespread somatic symptoms had increased serum levels of IL-6. Although neither IBS bowel habit subgroups nor patients with possible post-infectious IBS were associated with distinct cytokine profiles, a small cluster of IBS patients with comparatively elevated immune markers was identified. CONCLUSIONS: Global cytokine profiles did not discriminate IBS patients from healthy subjects, but cytokine profiles were more varied among IBS patients than among healthy subjects, and a small subgroup of patients with enhanced immune activity was identified. Also, association of inflammatory cytokines with some clinical symptoms suggests that immune activation may be of importance in a subset of IBS patients.

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