Cited by 169Rheumatoid Arthritis Research and TherapiesMetabolomics and Mass Spectrometry StudiesSpectroscopy Techniques in Biomedical and Chemical Research

Global Metabolite Profiling of Synovial Fluid for the Specific Diagnosis of Rheumatoid Arthritis from Other Inflammatory Arthritis

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Kim, Sooah, Hwang, Jiwon, Xuan, Jinhua, Jung, Young Hoon, Cha, Hoon-Suk, Kim, Kyoung Heon·2014·PLoS ONE

Abstract

Currently, reliable biomarkers that can be used to distinguish rheumatoid arthritis (RA) from other inflammatory diseases are unavailable. To find possible distinctive metabolic patterns and biomarker candidates for RA, we performed global metabolite profiling of synovial fluid samples. Synovial fluid samples from 38 patients with RA, ankylosing spondylitis, Behçet's disease, and gout were analyzed by gas chromatography/time-of-flight mass spectrometry (GC/TOF MS). Orthogonal partial least-squares discriminant and hierarchical clustering analyses were performed for the discrimination of RA and non-RA groups. Variable importance for projection values were determined, and the Wilcoxon-Mann-Whitney test and the breakdown and one-way analysis of variance were conducted to identify potential biomarkers for RA. A total of 105 metabolites were identified from synovial fluid samples. The score plot of orthogonal partial least squares discriminant analysis showed significant discrimination between the RA and non-RA groups. The 20 metabolites, including citrulline, succinate, glutamine, octadecanol, isopalmitic acid, and glycerol, were identified as potential biomarkers for RA. These metabolites were found to be associated with the urea and TCA cycles as well as fatty acid and amino acid metabolism. The metabolomic analysis results demonstrated that global metabolite profiling by GC/TOF MS might be a useful tool for the effective diagnosis and further understanding of RA.

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  • In a mouse model of multiple sclerosis, transplantation of neural stem cells reduces succinate levels in the cerebrospinal fluid and decreases infiltration of damaging macrophages and microglial cells.

    “In a mouse model of multiple sclerosis (MS) transplantation of neural stem cells (NSCs) reduced succinate levels in the cerebrospinal fluid and thereby decreased infiltration of damaging macrophages and microglial cells10.”
  • Ligation of SUCNR1 on neural stem cells upregulates the dicarboxylate co-transporter Slc13a3/5, correlating with increased succinate uptake by the NSCs.

    “Mechanistically, ligation of SUCNR1 on the surface of NSCs upregulates the expression of the dicarboxylate co-transporter Slc13a3/5, which correlates with increased uptake by the NSCs thereby scavenging succinate away from pro-inflammatory immune cells.”
  • A portion of succinate that accumulates during ischemia and inflammation is released from the cell into the extracellular environment.

    “a portion of the succinate that accumulates during ischemia and inflammation is released from the cell into the extracellular environment through poorly defined processes. This occurs following IR injury158,159, inflammation10, or cold exposure160.”
  • Specific PHD inhibitors such as Vadadustat have shown promise in chronic kidney disease, increasing erythropoiesis and providing a means of attenuating HIF in other pathologies.

    “However, specific PHD inhibitors have been developed, such as Vadadustat, and have shown promise in chronic kidney disease, increasing erythropoiesis and providing a means of attenuating HIF in other pathologies [10].”

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Authors
Kim, S., Hwang, J., Xuan, J., Jung, Y. H., Cha, H.-S., & Kim, K. H.
Affiliations
  • Korea University (KR)
  • Samsung Medical Center (KR)
Corresponding author
  • Cha, Hoon-Suk
  • Kim, Kyoung Heon
Venue
PLoS ONE
Published
2014-06-02
Volume
9
Issue
6
Pages
e97501
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2041030202
Cited by
169
References
41
Citations by year
2026: 9 · 2025: 12 · 2024: 9 · 2023: 15 · 2022: 17 · 2021: 18 · 2020: 19 · 2019: 14 · 2018: 16 · 2017: 14 · 2016: 14 · 2015: 11 · 2014: 1
FWCI
10.92
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
Korea University
Topics
  • Health Sciences › Medicine › Rheumatology › Rheumatoid Arthritis Research and Therapies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolomics and Mass Spectrometry Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Spectroscopy Techniques in Biomedical and Chemical Research
Keywords
rheumatoid arthritis, synovial fluid, metabolomics, biomarkers, differential diagnosis, ankylosing spondylitis, Behçet's disease, gout, inflammatory arthritis, citrulline, succinic acid, glutamine, fatty acid metabolism, amino acid metabolism, urea cycle, TCA cycle
MeSH terms
Adult, Arthritis, Rheumatoid, Diagnosis, Differential, Female, Humans, Inflammation, Male, Predictive Value of Tests, ROC Curve, Synovial Fluid, Biomarkers, Cluster Analysis, Discriminant Analysis, Least-Squares Analysis, Case-Control Studies, Area Under Curve, Metabolomics, Metabolome

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