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Calcium-phosphate complex increased during subchondral bone remodeling affects earlystage osteoarthritis

Title
Calcium-phosphate complex increased during subchondral bone remodeling affects earlystage osteoarthritis
Authors
Jung, Youn KwanHan, Min SuPark, Hye RiLee, Eun JuJang, Ji AeKim, Gun WooLee, Sun YoungMoon, Dae WonHan, Seung Woo
DGIST Authors
Moon, Dae Won
Issue Date
2018-01
Citation
Scientific Reports, 8(1)
Type
Article
Article Type
Article
Keywords
FACTOR-KAPPA-BENDOCHONDRAL OSSIFICATIONARTICULAR CHONDROCYTESGENE-EXPRESSIONCARTILAGEMODELINHIBITIONTRANSCRIPTIONMECHANISMCRYSTALS
ISSN
2045-2322
Abstract
An activation of osteoclasts and subchondral bone remodeling is a major histologic feature of early-stage osteoarthritis (OA), which can be accompanied by an increase of calcium (Ca) and phosphate (Pi) level in the subchondral milieu. Considering articular cartilage gets most of nutrition from subchondral bone by diffusion, these micro-environmental changes in subchondral bone can affect the physiology of articular chondrocytes. Here, we have shown that Ca is increased and co-localized with Pi in articular cartilage of early-stage OA. The Ca-Pi complex increased the production of MMP-3 and MMP-13 in the hypertrophic chondrocytes, which was dependent on nuclear factor-kappa B (NF-kB), p38 and extracellular signal-regulated kinase (Erk) 1/2 mitogen-activated protein (MAP) kinase and Signal transducer and activator of transcription 3 (STAT3) signaling. The Ca-Pi complexes increased the expression of endocytosis markers, and the inhibition of the formation of the Ca-Pi complex ameliorated the Ca-Pi complex-mediated increases of MMPs expression in hypertrophic chondrocytes. Our data provide insight regarding the Ca-Pi complex as a potential catabolic mediator in the subchondral milieu and support the pathogenic role of subchondral bone in the early stages of cartilage degeneration. © 2017 The Author(s).
URI
http://hdl.handle.net/20.500.11750/5598
DOI
10.1038/s41598-017-18946-y
Publisher
Nature Publishing Group
Related Researcher
Files:
There are no files associated with this item.
Collection:
New BiologyNanoBio Imaging Laboratory1. Journal Articles


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