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  • Title: Long-term evaluation of faecal calprotectin levels in a European cohort of children with cystic fibrosis.
    Author: Roca M, Masip E, Colombo C, Boon M, Hulst JM, Garriga M, de Koning BAE, Bulfamante A, de Boeck K, Ribes-Koninckx C, Calvo-Lerma J.
    Journal: Arch Dis Child; 2024 Jun 19; 109(7):552-556. PubMed ID: 38123920.
    Abstract:
    OBJECTIVE: Intestinal 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. DESIGN: Prospective 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. SETTING: Six European CF centres in the context of MyCyFAPP Project. SUBJECTS: Children with CF and pancreatic insufficiency (2-18 years old). MAIN OUTCOME MEASUREMENTS: fCP 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. RESULTS: Twenty-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). CONCLUSIONS: In 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.
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