Matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI) reveals potential lipid markers between infrapatellar fat pad biopsies of osteoarthritis and cartilage defect patients

Mirella J.J. Haartmans, Britt S.R. Claes, Gert B. Eijkel, Kaj S. Emanuel, Gabrielle J.M. Tuijthof, Ron M.A. Heeren, Pieter J. Emans, Berta Cillero-Pastor*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)
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Abstract

The incidence of osteoarthritis (OA) has been expected to increase due to an aging population, as well as an increased incidence of intra-articular (osteo-) chondral damage. Lipids have already been shown to be involved in the inflammatory process of OA. This study aims at revealing region-specific lipid profiles of the infrapatellar fat pad (IPFP) of OA or cartilage defect patients by matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI), which could be used as biomarkers for early OA detection. A higher presence of phospholipids was found in OA patients compared with cartilage defect patients. In addition, a higher abundance of ether-linked phosphatidylethanolamines (PE O-s) containing arachidonic acid was specifically found in OA patients compared with cartilage defect patients. These lipids were mainly found in the connective tissue of the IPFP. Specific lipid species were associated to OA patients compared with cartilage defect patients. PE O-s have been suggested as possible biomarkers for OA. As these were found more abundantly in the connective tissue, the IPFP’s intra-tissue heterogeneity might play an important role in biomarker discovery, implying that the amount of fibrous tissue is associated with OA. Graphical Abstract: [Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)5997-6007
Number of pages11
JournalAnalytical and bioanalytical chemistry
Volume415
Issue number24
Early online date28 Jul 2023
DOIs
Publication statusPublished - Oct 2023

Keywords

  • Biomarkers
  • Cartilage regeneration
  • Hoffa’s fat pad
  • Lipids
  • Mass spectrometry imaging
  • Total knee arthroplasty
  • UT-Hybrid-D

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