Review article: Faecal biomarkers for assessing small intestinal damage in coeliac disease and environmental enteropathy

Author:

Kivelä Laura1234ORCID,Lindfors Katri2ORCID,Lundin Knut E. A.56ORCID,Størdal Ketil17ORCID

Affiliation:

1. Department of Pediatric Research, Faculty of Medicine University of Oslo Oslo Norway

2. Celiac Disease Research Center, Faculty of Medicine and Health Technology Tampere University Tampere Finland

3. Children's Hospital, Helsinki University Hospital Helsinki Finland

4. Department of Pediatrics Tampere University Hospital, Wellbeing Services County of Pirkanmaa Tampere Finland

5. Department of Gastroenterology Oslo University Hospital Rikshospitalet Oslo Norway

6. Norwegian Coeliac Disease Research Centre Institute of Clinical Medicine, Faculty of Medicine, University of Oslo Oslo Norway

7. Department of Pediatric and Adolescent Medicine Oslo University Hospital Oslo Norway

Abstract

SummaryBackgroundIn coeliac disease and environmental enteropathy, dietary gluten and enteric infections cause reversible inflammation and morphological changes to the small intestinal mucosa that can be detected in biopsy samples obtained by endoscopy. However, there is a clear need for non‐invasive biomarkers. Constant shedding of mucosal material into the bowel lumen and faeces, together with easy availability of stool, makes it an interesting sample matrix.AimsTo conduct a systematic literature search and summarize the existing evidence for host mucosa‐derived faecal biomarkers in evaluating small intestinal damage.MethodsWe searched for studies on PubMed (MEDLINE) until 1 March 2024.ResultsWe identified 494 studies and included 35 original case–control and cohort studies. These assessed host mucosal transcripts and 14 other markers aiming specifically to reflect inflammation and cell‐mediated, innate and gluten‐induced immune responses. In coeliac disease, faecal calprotectin and anti‐gliadin, tissue transglutaminase, endomysium and deamidated gliadin peptide antibodies were the most studied but with inconsistent results. Single studies reported positive findings about microRNA transcripts, β‐defensin‐2, lipocalin‐2, zonulin‐related proteins and angiotensin‐converting enzyme. In environmental enteropathy, a non‐significant association was reported between calprotectin and urine lactulose/mannitol ratio; there were conflicting results for neopterin, myeloperoxidase and host transcripts. Single studies reported a positive association for lactoferrin, and a negative association for regenerating islet‐derived protein 1. Studies comparing faecal markers against small intestinal biopsy findings were not identified in environmental enteropathy.ConclusionsFurther studies are needed to determine reliable faecal markers as a proxy for small intestinal mucosal damage.

Funder

Academy of Finland

Paulon Säätiö

Sigrid Juséliuksen Säätiö

Publisher

Wiley

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