首页 | 本学科首页   官方微博 | 高级检索  
  按 检索      


Canonical Wnt signaling differently modulates osteogenic differentiation of mesenchymal stem cells derived from bone marrow and from periodontal ligament under inflammatory conditions
Authors:Wenjia Liu  Anna Konermann  Tao Guo  Andreas Jäger  Liqiang Zhang  Yan Jin
Institution:1. Research and Development Center for Tissue Engineering, The Fourth Military Medical University, Xi''an, Shaanxi, People''s Republic of China;2. Department of Oral Histology and Pathology, School of Stomatology, The Fourth Military Medical University, Xi''an, Shaanxi, People''s Republic of China;3. Department of Orthodontics, Medical Faculty, University of Bonn, Bonn, Germany;4. Department of Orthodontics, School of Stomatology, The Fourth Military Medical University, Xi''an, Shaanxi, People''s Republic of China
Abstract:

Background

Cellular plasticity and complex functional requirements of the periodontal ligament (PDL) assume a local stem cell (SC) niche to maintain tissue homeostasis and repair. Here, pathological alterations caused by inflammatory insults might impact the regenerative capacities of these cells. As bone homeostasis is fundamentally controlled by Wnt-mediated signals, it was the aim of this study to characterize the SC-like capacities of cells derived from PDL and to investigate their involvement in bone pathophysiology especially regarding the canonical Wnt pathway.

Methods

PDLSCs were investigated for their SC characteristics via analysis of cell surface marker expression, colony forming unit efficiency, proliferation, osteogenic differentiation and adipogenic differentiation, and compared to bone marrow derived mesenchymal SCs (BMMSCs). To determine the impact of both inflammation and the canonical Wnt pathway on osteogenic differentiation, cells were challenged with TNF-α, maintained with or without Wnt3a or DKK-1 under osteogenic induction conditions and investigated for p-IκBα, p-NF-κB, p-Akt, β-catenin, p-GSK-3β, ALP and Runx2.

Results

PDLSCs exhibit weaker adipogenic and osteogenic differentiation capacities compared to BMMSCs. TNF-α inhibited osteogenic differentiation of PDLSCs more than BMMSCs mainly through regulating canonical Wnt pathway. Blocking the canonical Wnt pathway by DKK-1 reconstituted osteogenic differentiation of PDLSCs under inflammatory conditions, whereas activation by Wnt3a increased osteogenic differentiation of BMMSCs.

Conclusions

Our results suggest a diverse regulation of the inhibitory effect of TNF-α in BMMSCs and PDLSCs via canonical Wnt pathway modulation.

General significance

These findings provide novel insights on PDLSC SC-like capacities and their involvement in bone pathophysiology under the impact of the canonical Wnt pathway.
Keywords:
本文献已被 ScienceDirect 等数据库收录！
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号