Abstract
Objective: This study aimed to evaluate the combination of SDF-1 and KLD-12 to form self-assembling polypeptide and its effect on osteogenic differentiation.
Methods: ELISA assay was performed to detect whether KLD-12 composite SDF-1 self-assembled polypeptide was successfully prepared. BMSCs were isolated and characterized by Flow cytometry. MTT assays, Calcein-AM/PI fluorescence staining, and Glycosaminoglycans (GAGs) measurement were carried out to detect cell viability after cells exposed to KLD-12 composite SDF-1 selfassembled polypeptide. The migration of cells induced by KLD-12 composite SDF-1 selfassembled polypeptide was also examined by transwell assay and Immunoblot. Osteogenic differentiation of cells stimulated with KLD-12 composite SDF-1 self-assembled polypeptide was analyzed by Immunoblot, Alizarin Red Staining, and Alkaline Phosphatase activity. Additionally, immunoblot and immunofluorescence assays were performed to investigate the effects of the polypeptide on the Wnt/β-catenin pathway.
Results: KLD-12 composite SDF-1 self-assembled polypeptide was successfully prepared and identified. In addition, we isolated and characterized mouse mesenchymal stem BMSCs. Our data further revealed that KLD-12 combined with SDF-1 self-assembled polypeptide improved the survival of BMSCs and promoted cell migration. Moreover, the self-assembled polypeptide induced osteogenic differentiation of BMSCs. Mechanically, we found that the self-assembled polypeptide activated the Wnt/β-catenin pathway, therefore promoting the differentiation and migration of BMSCs.
Conclusion: Our proposed treatment can potentially be effective for bone defects.
Keywords: Bone defects, bone marrow-derived mesenchymal stem cells (BMSCs), SDF-1, KLD-12, self-assembled polypeptide, Wnt/β-catenin pathway.
Graphical Abstract
[http://dx.doi.org/10.1007/s13770-019-00231-w] [PMID: 31983036]
[http://dx.doi.org/10.1016/j.jot.2019.09.008] [PMID: 32440503]
[http://dx.doi.org/10.1089/ten.tea.2020.0264] [PMID: 33108972]
[http://dx.doi.org/10.1002/term.2883] [PMID: 31066519]
[http://dx.doi.org/10.3389/fcell.2021.639006] [PMID: 33681223]
[http://dx.doi.org/10.1111/cpr.12133] [PMID: 25252214]
[PMID: 34346843]
[http://dx.doi.org/10.3892/ol.2020.11744] [PMID: 32724425]
[http://dx.doi.org/10.1021/acsami.0c03822] [PMID: 32314911]
[http://dx.doi.org/10.1177/19476035211030988] [PMID: 34308665]
[http://dx.doi.org/10.1111/jre.12876] [PMID: 33733508]
[http://dx.doi.org/10.1007/s10787-021-00814-x] [PMID: 34085175]
[http://dx.doi.org/10.5603/FHC.a2021.0008] [PMID: 33704767]
[PMID: 25972996]
[http://dx.doi.org/10.3390/molecules23123086] [PMID: 30486330]
[http://dx.doi.org/10.1016/j.bbalip.2017.11.001] [PMID: 29133280]
[http://dx.doi.org/10.1002/mc.22985] [PMID: 30693973]
[http://dx.doi.org/10.1007/s10103-017-2224-8] [PMID: 28508243]
[http://dx.doi.org/10.1016/j.biomaterials.2011.05.045] [PMID: 21663957]
[http://dx.doi.org/10.1002/1878-0261.12560] [PMID: 31402556]