Investigation of a novel functionalized peptide as a biomaterial

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In vitro evaluation of biomaterials for bone tissue engineering

Maria Chatzinikolaidou

Biomaterials

Dept. Materials Science and Technology

University of Crete, P.O. Box 2208 GR-

71303 Heraklio, Crete, Greece mchatzin@materials.uoc.gr

Research activities

 In vitro biocompatibility study of biomaterials, including cell adhesion, viability, proliferation and morphology of mammalian cell lines and stem cells

 Investigation of the osteoinductive potential of implantable biomaterials  bone tissue repair

 Development of immobilization techniques for proteins on biomaterials surfaces

 Adsorption and desorption studies of proteins on biomaterials surfaces

Cell adhesion shown by SEM

Cell source: Bone marrow mesenchymal stem cells from donors’ iliac crest

Biomaterial: organic-inorganic composite material, structured by twophoton polymerization

After 4 hours After 3 days

In collaboration with Prof. Maria Vamvakaki, Dr. Maria Farsari and Prof. Eleni Papadaki

Cell adhesion and proliferation shown by SEM

Cell source: Bone marrow mesenchymal stem cells from donors’ iliac crest

Biomaterial: organic-inorganic composite material, structured by twophoton polymerization

After 6 days

In collaboration with Prof. Maria Vamvakaki, Dr. Maria Farsari and Prof. Eleni Papadaki

Cell adhesion shown by SEM

Cell source: Bone marrow mesenchymal stem cells from donors’ iliac crest

Biomaterial: organic-inorganic composite material – meshes structured by two-photon polymerization

After 4 hours

In collaboration with Prof. Maria Vamvakaki, Dr. Maria Farsari and Prof. Eleni Papadaki

Cell formations during adhesion

Early event Late event

Extracellular factors and integrin-derived signaling trigger activate actin polymerization at the leading-edge membrane (as an early event ) and the formation of focal adhesions (as a later event )

Biomaterials: The Intersection of Biology and Materials ScienceJohnna S. Temenoff, Antonios G. Mikos

Cell morphology of MC3T3-E1

Visualization of vinculin and actin cytoskeleton by means of confocal microscopy

Cell source: mouse pre-osteoblasts MC3T3-E1

Biomaterial: organic-inorganic composite material

Overlay of double staining with ΤRΙTC-conjugated falloifin and

FITC-conjugated anti-vinculin magnification 20x

Cell morphology

Visualization of vinculin and actin cytoskeleton by means of confocal microscopy

Cell source: mouse pre-osteoblasts MC3T3-E1

Biomaterial: organic-inorganic composite material

Overlay of double staining with ΤRΙTC-conjugated falloifin and

FITC-conjugated anti-vinculin magnification 40x

Acknowledgements

Collaborations

Prof. Maria Vamvakaki, UoC

Dr. Maria Farsari, Prof. Costas Fotakis, IESL-FORTH

Prof. Eleni Papadaki, UoC

A reservoir for progenitor cells

http://anatquest.nlm.nih.gov

Organic-inorganic composite material

Methacryloxypropyl trimethoxysilane (MAPTMS),

(2-dimethylamino)ethyl methacrylate (DMAEMA) and methacrylic acid (MAA) as the polymerizable monomers

Zirconium n-propoxide (Zr(OPr)

4

, and the trimethoxysilane groups of MAPTMS serve as the inorganic network forming moieties

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