Long-term evaluation of faecal calprotectin levels in a European cohort of children with cystic fibrosis

Author:

Roca Maria,Masip Etna,Colombo Carla,Boon Mieke,Hulst Jessie M,Garriga María,de Koning Barbara A E,Bulfamante Anna,de Boeck Kris,Ribes-Koninckx Carmen,Calvo-Lerma JoaquimORCID

Abstract

ObjectiveIntestinal inflammation with contradictory data on faecal calprotectin (fCP) levels is documented in patients with cystic fibrosis (CF). The aim of this study was to longitudinally evaluate fCP in a cohort of children with CF and their relationship with clinical variables.DesignProspective observational study to assess evolution of fCP levels, primary aimed at improving fat absorption. Along 1.5 years of follow-up (November 2016–May 2018) with four study visits pertaining to a pilot study (two of four) and to a clinical trial (two of four), the study outcomes were measured.SettingSix European CF centres in the context of MyCyFAPP Project.SubjectsChildren with CF and pancreatic insufficiency (2–18 years old).Main outcome measurementsfCP levels, pulmonary function (percentage of forced expiratory volume in 1 s (FEV1%)) and coefficient of fat absorption (CFA). Additionally, in the last two visits, gastrointestinal (GI) symptoms were evaluated through the PedsQL-GI Questionnaire. Linear mixed regression models were applied to assess association between fCP and FEV1, CFA and GI symptoms.ResultsTwenty-nine children with CF and pancreatic insufficiency were included. fCP levels were inversely associated with total modified specific PedsQL-GI score (p=0.04) and positively associated with diarrhoea (p=0.03), but not with CFA. Along the four study visits, fCP significantly increased (from 62 to 256 µg/g) and pulmonary function decreased (from 97% to 87%), with a significant inverse association between the two study outcomes (p<0.001).ConclusionsIn children with CF, fCP levels are inversely associated with pulmonary function and thus the specificity of fCP as a marker of intestinal inflammation in paediatric patients with CF warrants further investigation.

Funder

Research and Innovation Framework Programme

Publisher

BMJ

Subject

Pediatrics, Perinatology and Child Health

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