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Nanostructured Scaffolds for Tissue Engineering Applications

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Title: Nanostructured Scaffolds for Tissue Engineering Applications


1
Nanostructured Scaffolds for Tissue Engineering
Applications
  • Nathaniel Hogrebe
  • Xia Lab
  • Washington University in St. Louis

2
Tendon to Bone Attachment
www.eorthopod.com
3
Bone and Tendon Anatomy
4
Project Goal
5
Scaffolds
www.rsc.org
www.ptei.org
6
Electrospinning
Process by which a solution is made into fibers
through the utilization of an electric current
7
Nanofiber Scaffolds
10 µm
Aligned Random
8
Biomineralization
9
Mineral Gradients
50 µm
Decreasing Mineral Concentration
10
Cell Density
100 µm
11
Cell Density
Decreasing Mineral Concentration
12
Cell Differentiation
Increasing Mineral Concentration
100 µm
13
Conclusion
www.bocaorthoandsports.com
14
Acknowledgements
  • National Nanotechnology Infrastructure Network
    Research Experience for Undergraduates Program
  • Dr. Jingwei Xie, Mentor
  • Dr. Younan Xia, Principle Investigator
  • Xia Lab, Washington University in St. Louis
  • Nano Research Facility, Washington University in
    St. Louis

15
References
  • Benjamin, M., et al. Where tendons and ligaments
    meet bone attachment
  • sites (entheses) in relation to exercise
    and/or mechanical load. J. Anat. 2006 208
    471490.
  • Li, X., et al. Nanofiber scaffolds with
    gradations in mineral content for mimicking the
    tendon-to-bone insertion site. Nano Letters 2009
    92763-2768.
  • Muller P., et al. Calcium Phosphate Surfaces
    Promote Osteogenic Differentiation of Mesenchymal
    Stem Cells. Cell. Mol. Med. Vol 12, No 1, 2008
    281-291.
  • Perla, V. Webster T.J. Nano-hydroxyapatitethermal
    ly denatured small intestine sub-mucosa
    composites for entheses applications.
    International Journal of Nanomedicine 20061(3)
    351-359.
  • Saldana, L., et al. Calcium phosphate-based
    particles influence osteogenic maturation of
    human mesenchymal stem cells. Acta Biomaterialia
    2009 5 1294-1305.
  • Suresh, S. Graded materials for resistance to
    contact deformation and damage. Science 2001
    292 471-490.
  • Xie, J., X. Li, X. Xia. Putting electrospun
    nanofibers to work for biomedical research.
    Macromolecular Rapid Communications 2008
    291775-1792.
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