Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1074/mcp.M115.049718
Title (Primary) Osteoblast-released matrix vesicles, regulation of activity and composition by sulfated and non-sulfated glycosaminoglycans
Author Schmidt, J.R.; Kliemt, S.; Preissler, C.; Moeller, S.; von Bergen, M.; Hempel, U.; Kalkhof, S.
Source Titel Molecular & Cellular Proteomics
Year 2016
Department PROTEOM
Volume 15
Page From 558
Page To 572
Language englisch
Keywords Cell biology; Exosomes; Extracellular matrix; Quantification; SILAC
UFZ wide themes RU3;
Abstract Our aging population has to deal with the increasing threat of age-related diseases that impair bone healing. One promising therapeutic approach involves the coating of implants with modified glycosaminoglycans (GAGs) that mimic the native bone environment and actively facilitate skeletogenesis. In previous studies, we reported that coatings containing GAGs such as hyaluronic acid (HA) and its synthetically sulfated derivative (sHA1) as well as the naturally low-sulfated GAG chondroitin sulfate (CS1) reduce the activity of bone-resorbing osteoclasts, but also induce functions of the bone-forming cells, the osteoblasts. However, it remained open whether GAGs influence the osteoblasts alone or whether they also directly affect the formation, composition, activity, and distribution of osteoblast-released matrix vesicles (MV), which are supposed to be the active machinery for bone formation. Here we studied the molecular effects of sHA1, HA and CS1 on MV activity and on the distribution of marker proteins. Furthermore, we used comparative proteomic methods to study the relative protein compositions of isolated MVs and MV-releasing osteoblasts. The MV proteome is much more strongly regulated by GAGs than the cellular proteome. GAGs, especially sHA1, were found to severely impact vesicle-ECM interaction and matrix vesicle activity, leading to stronger ECM formation and mineralization. The present study shows that the regulation of MV activity is one important mode of action of GAGs and provides information on underlying molecular mechanisms.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=17033
Schmidt, J.R., Kliemt, S., Preissler, C., Moeller, S., von Bergen, M., Hempel, U., Kalkhof, S. (2016):
Osteoblast-released matrix vesicles, regulation of activity and composition by sulfated and non-sulfated glycosaminoglycans
Mol. Cell. Proteomics 15 , 558 - 572