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Niessink T, Stassen RHMJ, Kischkel B, Vuscan P, Emans PJ, van den Akker GGH, Janssen M, Joosten LAB, Otto C, Welting TJM, Jansen TL. Discovery of calcite as a new pro-inflammatory calcium-containing crystal in human osteoarthritic synovial fluid. Osteoarthritis Cartilage 2024:S1063-4584(24)01203-2. [PMID: 38806070 DOI: 10.1016/j.joca.2024.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 05/14/2024] [Accepted: 05/21/2024] [Indexed: 05/30/2024]
Abstract
OBJECTIVE We aimed to characterize calcium-containing crystals present in synovial fluid from patients with knee osteoarthritis (OA) using Raman spectroscopy, and specifically investigate the biological effects of calcite crystals. DESIGN Thirty-two synovial fluid samples were collected pre-operatively from knee OA patients undergoing total joint arthroplasty. An integrated Raman polarized light microscope was used for identification of crystals in synovial fluid. Human peripheral blood mononuclear cells (PBMC's), human OA articular chondrocytes (HACs) and fibroblast-like synoviocytes (FLSs) were exposed to calcite crystals. Expression of relevant cytokines and inflammatory genes were measured using ELISA and real-time PCR. RESULTS Various calcium-containing crystals were identified, including calcium pyrophosphate (37.5 %) and basic calcium phosphate (21.8 %), but they were never found simultaneously in the same OA synovial fluid sample. For the first time, we discovered the presence of calcite crystals in 93.8 % of the samples, while dolomite was detected in 25 % of the cases. Characterization of the cellular response to calcite crystal exposure revealed increased production of innate immune-derived cytokines by PBMC's, when co-stimulated with lipopolysaccharide (LPS). Additionally, calcite crystal stimulation of HACs and FLSs resulted in enhanced secretion of pro-inflammatory molecules and alterations in the expression of extracellular matrix remodeling enzymes. CONCLUSIONS This study highlights the unique role of Raman spectroscopy in OA crystal research and identified calcite as a novel pro-inflammatory crystal type in OA synovial fluid. Understanding the role of specific crystal species in the OA joint may open new avenues for pharmacological interventions and personalized approaches to treating OA.
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Affiliation(s)
- Tom Niessink
- Department of Rheumatology, VieCuri Medical Centre, Tegelseweg 210, 5912 BL Venlo, the Netherlands; Personalized Therapeutics and Diagnostics, Department of Bioengineering Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, the Netherlands.
| | - Roderick H M J Stassen
- Department of Experimental Orthopaedics, Maastricht University Medical Centre, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
| | - Brenda Kischkel
- Department of Internal Medicine, Radboud University Medical Centre, Geert Grooteplein Zuid 8, 6525 GA Nijmegen, the Netherlands
| | - Patricia Vuscan
- Department of Internal Medicine, Radboud University Medical Centre, Geert Grooteplein Zuid 8, 6525 GA Nijmegen, the Netherlands
| | - Peter J Emans
- Department of Experimental Orthopaedics, Maastricht University Medical Centre, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
| | - Guus G H van den Akker
- Department of Experimental Orthopaedics, Maastricht University Medical Centre, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
| | - Matthijs Janssen
- Department of Rheumatology, VieCuri Medical Centre, Tegelseweg 210, 5912 BL Venlo, the Netherlands
| | - Leo A B Joosten
- Department of Internal Medicine, Radboud University Medical Centre, Geert Grooteplein Zuid 8, 6525 GA Nijmegen, the Netherlands; Department of Medical Genetics, Iuliu Hatieganu University of Medicine and Pharmacy, Str. Pasteur, Nr. 6, 400012 Cluj-Napoca, Romania
| | - Cees Otto
- Personalized Therapeutics and Diagnostics, Department of Bioengineering Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, the Netherlands
| | - Tim J M Welting
- Department of Experimental Orthopaedics, Maastricht University Medical Centre, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
| | - Tim L Jansen
- Department of Rheumatology, VieCuri Medical Centre, Tegelseweg 210, 5912 BL Venlo, the Netherlands
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He Y, Liu S, Lin H, Ding F, Shao Z, Xiong L. Roles of organokines in intervertebral disc homeostasis and degeneration. Front Endocrinol (Lausanne) 2024; 15:1340625. [PMID: 38532900 PMCID: PMC10963452 DOI: 10.3389/fendo.2024.1340625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Accepted: 02/19/2024] [Indexed: 03/28/2024] Open
Abstract
The intervertebral disc is not isolated from other tissues. Recently, abundant research has linked intervertebral disc homeostasis and degeneration to various systemic diseases, including obesity, metabolic syndrome, and diabetes. Organokines are a group of diverse factors named for the tissue of origin, including adipokines, osteokines, myokines, cardiokines, gastrointestinal hormones, and hepatokines. Through endocrine, paracrine, and autocrine mechanisms, organokines modulate energy homeostasis, oxidative stress, and metabolic balance in various tissues to mediate cross-organ communication. These molecules are involved in the regulation of cellular behavior, inflammation, and matrix metabolism under physiological and pathological conditions. In this review, we aimed to summarize the impact of organokines on disc homeostasis and degeneration and the underlying signaling mechanism. We focused on the regulatory mechanisms of organokines to provide a basis for the development of early diagnostic and therapeutic strategies for disc degeneration.
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Affiliation(s)
- Yuxin He
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Sheng Liu
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hui Lin
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Fan Ding
- Department of Orthopaedics, JingMen Central Hospital, Jingmen, China
- Hubei Minzu University, Enshi, China
| | - Zengwu Shao
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Liming Xiong
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Onuora S. Fetuin-A peptide inhibits cartilage calcification. Nat Rev Rheumatol 2023; 19:63. [PMID: 36627395 DOI: 10.1038/s41584-023-00907-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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