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Cellular and Molecular Bioengineering

, Volume 12, Issue 1, pp 53–67 | Cite as

Ciliotherapy Treatments to Enhance Biochemically- and Biophysically-Induced Mesenchymal Stem Cell Osteogenesis: A Comparison Study

  • M. A. Corrigan
  • T. M. Ferradaes
  • M. Riffault
  • D. A. HoeyEmail author
Article

Abstract

Introduction

New approaches to treat osteoporosis have focused on promoting bone formation through the targeting of osteoblasts and their progenitors, mesenchymal stem cells (MSCs). The primary cilium is a singular cellular extension known to play an important role in biochemical and biophysical osteogenic induction of MSCs. Defects in ciliary structure have been associated with a plethora of diseases. Therefore targeting the cilium therapeutically (ciliotherapies) has emerged as a potential new treatment modality. Therefore, this study performed a comparison analysis on known ciliotherapies and their potential effects in mediating MSC osteogenic differentiation.

Methods

MSCs were treated with forskolin, lithium chloride (LiCl) or fenoldopam to investigate the effect on ciliogenesis and cilia-associated signalling. Moreover, both early and long term biochemical and biophysical (fluid shear) induced osteogenic differentiation was examined in terms of osteogenic gene expression and bone matrix deposition following each treatment.

Results

LiCl and fenoldopam were found to enhance MSC ciliogenesis to a similar degree. LiCl significantly altered hedgehog (HH) and Wnt signalling which was associated with inhibited osteogenic gene expression, while fenoldopam demonstrated enhanced early osteogenesis. Long term treatment with both ciliotherapies did not enhance osteogenesis, however LiCl had detrimental effects on cell viability. Intriguingly both ciliotherapies enhanced MSC mechanosensitivity as demonstrated by augmented osteogenic gene expression in response to fluid shear, which over longer durations resulted in enhanced matrix deposition per cell.

Conclusions

Therefore, ciliotherapies can be utilised to enhance MSC ciliogenesis resulting in enhanced mechanosensitivity, however, only fenoldopam is a viable ciliotherapeutic option to enhance MSC osteogenesis.

Keywords

Bone Oscillatory fluid shear Primary cilium Mechanobiology Hedgehog Wnt 

Notes

Acknowledgments

This work was supported by a European Research Council Grant 336882 (to D.A.H.); Science Foundation Ireland European Research Council (ERC) Support Grant SFI 13/ERC/L2864 (to D.A.H.).

Conflict of interest

All the authors declare that they have no conflict of interest.

Ethical Approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Supplementary material

12195_2018_561_MOESM1_ESM.docx (702 kb)
Supplementary material 1 (DOCX 702 kb)

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Copyright information

© Biomedical Engineering Society 2018

Authors and Affiliations

  1. 1.Trinity Centre for Bioengineering, Trinity Biomedical Sciences InstituteTrinity CollegeDublinIreland
  2. 2.Dept. of Mechanical and Manufacturing Engineering, School of EngineeringTrinity College DublinDublin 2Ireland
  3. 3.School of EngineeringUniversidade Federal do Estado do Rio de JaneiroRio do JaneiroBrazil
  4. 4.Advanced Materials and Bioengineering Research CentreTrinity College Dublin & RCSIDublin 2Ireland

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