Pharmacological elevation of sphingosine- 1- phosphate by S1P lyase inhibition accelerates bone regeneration after post-traumatic osteomyelitis

  • Posttraumatic osteomyelitis and the ensuing bone defects are a debilitating complication after open fractures with little therapeutic options. We have recently identified potent osteoanabolic effects of sphingosine-1-phosphate (S1P) signalling and have now tested whether it may beneficially affect bone regeneration after infection. We employed pharmacological S1P lyase inhibition by 4-deoxypyrodoxin (DOP) to raise S1P levels in vivo in an unicortical long bone defect model of posttraumatic osteomyelitis in mice. In a translational approach, human bone specimens of clinical osteomyelitis patients were treated in organ culture in vitro with DOP. Bone regeneration was assessed by \(\mu\)CT, histomorphometry, immunohistology and gene expression analysis. The role of S1P receptors was addressed using S1PR3 deficient mice. Here, we present data that DOP treatment markedly enhanced osteogenesis in posttraumatic osteomyelitis. This was accompanied by greatly improved osteoblastogenesis and enhanced angiogenesis in the callus accompanied by osteoclast-mediated bone remodelling. We also identified the target of increased S1P to be the S1PR3 as \(S1PR3^{−/−}\) mice showed no improvement of bone regeneration by DOP. In the human bone explants, bone mass significantly increased along with enhanced osteoblastogenesis and angiogenesis. Our data suggest that enhancement of S1P/S1PR3 signalling may be a promising therapeutic target for bone regeneration in posttraumatic osteomyelitis.

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Author:Johannes Maximilian WagnerORCiDGND, Annalena WilleGND, Maria FuethGND, Sarah WeskeORCiDGND, Sebastian LotzienORCiDGND, Felix ReinkemeierGND, Christoph WallnerGND, Alexander Klaus SogorskiORCiDGND, Stephanie DittfeldGND, Mustafa BecerikliORCiDGND, Thomas Armin SchildhauerORCiDGND, Marcus LehnhardtGND, Bodo LevkauORCiDGND, Björn BehrORCiDGND
Parent Title (English):Journal of cellular and molecular medicine
Place of publication:Weinheim
Document Type:Article
Date of Publication (online):2024/03/20
Date of first Publication:2023/09/14
Publishing Institution:Ruhr-Universität Bochum, Universitätsbibliothek
Tag:Open Access Fonds
bone regeneration; osteomyelitis; sphingosin- 1- phosphate
First Page:3786
Last Page:3795
Article Processing Charge funded by the Deutsche Forschungsgemeinschaft (DFG) and the Open Access Publication Fund of Ruhr-Universität Bochum.
Institutes/Facilities:Berufsgenossenschaftliches Universitätsklinikum Bergmannsheil, Klinik für Plastische Chirurgie und Schwerbrandverletzte
Dewey Decimal Classification:Technik, Medizin, angewandte Wissenschaften / Medizin, Gesundheit
open_access (DINI-Set):open_access
Licence (English):License LogoCreative Commons - CC BY 4.0 - Attribution 4.0 International