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Circulating and Magnetic Resonance Imaging Biomarkers of Intestinal Fibrosis in Small Bowel Crohn's Disease.

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Biomarkers in blood and MRI scans correlate with inflammation and fibrosis in Crohn's disease ileal resections. These findings may help guide treatment decisions for patients with refractory disease.

Keywords:
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Area of Science:

  • Gastroenterology
  • Medical Biomarkers
  • Inflammatory Bowel Disease Research

Background:

  • Previous research identified circulating and MRI biomarkers linked to Crohn's disease (CD) surgical management.
  • This study investigated the association between these biomarkers and inflammation and collagen content in ileal resections.

Purpose of the Study:

  • To determine if circulating and MRI-derived biomarkers correlate with histological inflammation and fibrosis in ileal resections from CD patients.
  • To explore the potential of these biomarkers in guiding clinical decisions for refractory CD.

Main Methods:

  • Fifty CD patients undergoing ileal resection were prospectively enrolled.
  • Circulating biomarkers (CD64, ECM1, GM-CSF Ab, fecal calprotectin) and MRI parameters (3D MTR, MOLLI T1, IVIM, sMaRIA) were measured.
  • Ileal tissue inflammation and collagen content were assessed histologically and via microscopy.

Main Results:

  • An inverse relationship was observed between ileal inflammation and collagen content (r = -0.39, P = .008).
  • Several biomarkers, including CD64, GM-CSF Ab, fecal calprotectin, and sMaRIA, showed associations with inflammation and collagen levels.
  • A multivariable model indicated significant associations of ECM1 and GM-CSF Ab with ileal collagen content.

Conclusions:

  • Circulating and MRI biomarkers are associated with the balance of inflammation and fibrosis in CD ileal resections.
  • These biomarkers show potential for guiding medical and surgical management of refractory CD after further validation.