Point of no return for improvement of cartilage quality indicated by dGEMRIC before and after weight loss in patients with knee osteoarthritis: a cohort study

Research output: Contribution to journalArticle

Abstract

Background: It has been demonstrated that weight loss improves symptoms in obese subjects with knee osteoarthritis (KOA). A parallel change in cartilage morphology remains to be demonstrated. Purpose: To demonstrate a parallel change in cartilage morphology. Material and Methods: Obese patients with KOA were examined before and after weight loss over 16 weeks. Target knee joints were radiographically assessed by the Kellgren/Lawrence grading (KLG) system. Patients with KLG-1 and 2 changes in the lateral compartment were included. Delayed gadolinium-enhanced MRI of cartilage (dGEMRIC) was performed using intra-articular contrast. Results: Nine patients with lateral KLG-1 and ten patients with lateral KLG-2 were studied. There were no group differences regarding the lateral compartment baseline dGEMRIC T1 values: median = 497 ms (KLG-1) and 533 ms (KLG-2) (P = 0.12), or regarding reduction in body mass index (BMI) after 16 weeks: 12.8% versus 11.4% (P = 0.74). In the KLG-1 group, several cases of increased dGEMRIC T1 values were seen and median value decreased significantly less than in KLG-2 group (15 ms versus 41 ms, P = 0.03) after weight loss. Conclusion: Improvement of cartilage quality, assessed with dGEMRIC, after weight loss might be possible in early stage KOA (KLG-1), but not in later stage KOA (KLG-2). The results may suggest a point of no return for improvement of cartilage quality that should be tested in larger trials.

Details

Authors
  • Stine Hangaard
  • Henrik Gudbergsen
  • Marie Skougaard
  • Henning Bliddal
  • Janus D. Nybing
  • Carl Johan Tiderius
  • Mikael Boesen
Organisations
External organisations
  • Frederiksberg Hospital
  • Skåne University Hospital
  • Copenhagen University Hospital
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Orthopedics
  • Radiology, Nuclear Medicine and Medical Imaging

Keywords

  • cartilage, dGEMRIC, Knee osteoarthritis (KOA), magnetic resonance imaging (MRI), weight loss
Original languageEnglish
Pages (from-to)336-340
Number of pages5
JournalActa Radiologica
Volume59
Issue number3
Publication statusPublished - 2018 Mar 1
Publication categoryResearch
Peer-reviewedYes