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Quantification of c...
Quantification of chondroitin sulfate, hyaluronic acid and N-glycans in synovial fluid – A technical performance study
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- Andersson, Elin (author)
- Lund University,Lunds universitet,Lund OsteoArthritis Division - Nedbrytning av ledbrosk: en biologisk process som leder till artros,Forskargrupper vid Lunds universitet,Lund OsteoArthritis Division - Molecular marker research group,Lund University Research Groups
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- Tykesson, Emil (author)
- Lund University,Lunds universitet,Lungbiologi,Forskargrupper vid Lunds universitet,Lung Biology,Lund University Research Groups
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- Lohmander, L Stefan (author)
- Lund University,Lunds universitet,Lund OsteoArthritis Division - Nedbrytning av ledbrosk: en biologisk process som leder till artros,Forskargrupper vid Lunds universitet,Lund OsteoArthritis Division - Molecular marker research group,Lund University Research Groups
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- Karlsson, Niclas G (author)
- Oslo Metropolitan University
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- Jin, Chunsheng (author)
- University of Gothenburg
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- Mirgorodskaya, Ekaterina (author)
- University of Gothenburg
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- Swärd, Per (author)
- Lund University,Lunds universitet,Ortopedi - klinisk och molekylär osteoporosforskning,Forskargrupper vid Lunds universitet,Orthopedics - Clinical and Molecular Osteoporosis Research,Lund University Research Groups
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- Struglics, André (author)
- Lund University,Lunds universitet,Lund OsteoArthritis Division - Nedbrytning av ledbrosk: en biologisk process som leder till artros,Forskargrupper vid Lunds universitet,Lund OsteoArthritis Division - Molecular marker research group,Lund University Research Groups
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: Osteoarthritis and Cartilage Open. - 2665-9131. ; 5:3, s. 1-11
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Abstract
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- ObjectiveTo validate a quantitative high performance liquid chromatography (HPLC) assay for chondroitin sulfate (CS) and hyaluronic acid (HA) in synovial fluid, and to analyze glycan-patterns in patient samples.DesignSynovial fluid from osteoarthritis (OA, n = 25) and knee-injury (n = 13) patients, a synovial fluid pool (SF-control) and purified aggrecan, were chondroitinase digested and together with CS- and HA-standards fluorophore labelled prior to quantitative HPLC analysis. N-glycan profiles of synovial fluid and aggrecan were assessed by mass spectrometry.ResultsUnsaturated uronic acid and sulfated-N-acetylgalactosamine (ΔUA-GalNAc4S and ΔUA-GalNAc6S) contributed to 95% of the total CS-signal in the SF-control sample. For HA and the CS variants in SF-control the intra- and inter-experiment coefficient of variation was between 3–12% and 11–19%, respectively; tenfold dilution gave recoveries between 74 and 122%, and biofluid stability test (room temperature storage and freeze-thaw cycles) showed recoveries between 81 and 140%. Synovial fluid concentrations of the CS variants ΔUA-GalNAc6S and ΔUA2S-GalNAc6S were three times higher in the recent injury group compared to the OA group, while HA was four times lower. Sixty-one different N-glycans were detected in the synovial fluid samples, but there were no differences in levels of N-glycan classes between patient groups. The CS-profile (levels of ΔUA-GalNAc4S and ΔUA-GalNAc6S) in synovial fluid resembled that of purified aggrecan from corresponding samples; the contribution to the N-glycan profile in synovial fluid from aggrecan was low.ConclusionsThe HPLC-assay is suitable for analyzing CS variants and HA in synovial fluid samples, and the GAG-pattern differs between OA and recently knee injured subjects.
Subject headings
- NATURVETENSKAP -- Kemi -- Analytisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Analytical Chemistry (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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