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Oral Poster

Low-dose BMP-2 enhances the bone-forming effects of an injectable, PLGA fiber-reinforced, brushite-forming cement in sheep lumbar osteopenia defects

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Line-Up:
18:40 Oral Poster Effect of surface processing on roughness, wettability and cytotoxicity of carbon fiber-reinforced polyetheretherketone (PEEK) composite fabricated by fused deposition modeling 1 Dr. Xingting Han
18:43 Oral Poster Characterisation of bactericidal titanium surfaces using electron microscopy 1 Ph.D. Joshua Jenkins
18:49 Oral Poster Parvovirus B19 virus-like particles as platform for the development of biomaterials. 1 Prof. Dr. Ismael Bustos-Jaimes
18:52 Oral Poster The Influence of Surface Nanopatterns with varying Periodicities on Protein adsorption 1 Yu Yang
18:55 Oral Poster Opaque, Translucent and Transparent Flower Petals 1 Takumi Arakawa
18:58 Oral Poster Impact of Surface Morphology and Net Charge of Spider Silk based Materials on Interactions with Human Blood Components 1 Sarah Lentz
19:01 Oral Poster Modulation of Bacteria on Titanium Surfaces via Nanotopography and Antimicrobial Peptides 1 Marcus Eales
19:04 Oral Poster Degradable hybrid polymers for tissue engineering 1 Johannes Schwaiger
19:07 Oral Poster Antibacterial functionalization of plasma-chemical oxidized titanium surfaces 1 Dr. Stefan Kranz
19:10 Oral Poster Thermal crosslinking of hydrophilic polymers using polyperoxides 1 Ph.D. Solomiia Borova
19:13 Oral Poster Poly(peptoid)s: Peptidomimetics as potential Biomaterials 1 Christine Schlutt
19:16 Oral Poster A Nanoscaled Hybrid Coating for Neuronal Electrodes: Nanoporous Silica NPs Embodied into Nanoporous Platinum. 1 Tim-Joshua Pinkvos
19:19 Oral Poster Drug Delivery from Nanoporous Titania Coatings for Dental Application 1 Saskia Zailskas
19:22 Oral Poster Waste to resource: Biopolymer from industrial wastewater 1 Prof. Regina Nogueira
19:25 Oral Poster Divide and Comprehend: Separating the Effects of Hydrophobicity / Hydrophilicity and Crystallinity on the Thermal Properties of Polyester Based Drug Delivery Systems 1 Karl Scheuer
19:28 Oral Poster Elastic Polymer-Coated Nano- and Macroporous Bioactive Glass-Composites for Bone Regeneration 1 Marvin Lietzow
19:34 Oral Poster Alginate/silk fibroin-based hydrogels for vascularized tissue constructs 1 Dr. Raminder Singh
19:37 Oral Poster Diclofenac and moxifloxacin simultaneous delivery from intraocular lenses for endophthalmitis prophylaxis 1 Prof. Ana Serro
19:40 Oral Poster Optimization of a calcium phosphate based bone cement formulation 1 Prof. Dr. Rogério Cola?o
19:43 Oral Poster Nanostructured bone apatite-like thin films for bone prostheses 1 Dr. Gabriela Graziani
19:46 Oral Poster Low-dose BMP-2 enhances the bone-forming effects of an injectable, PLGA fiber-reinforced, brushite-forming cement in sheep lumbar osteopenia defects 1 Francesca Gunnella
19:49 Oral Poster The PLGA fiber component of brushite-forming calcium phosphate cement induces the osteogenic differentiation of human adipose tissue-derived stem cells 1 Francesca Gunnella
19:52 Oral Poster Surface functionalization of nanofibers by plasma processing in Ar/CO2/C2H4 discharge 0 Ph.D. Elizaveta Permyakova
19:55 Oral Poster Three-dimensional nanoscale X-ray computed tomography for the visualisation of cells grown on fibrous scaffolds 1 Dr. Juliana Martins de Souza e Silva

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Objectives: Injectable calcium phosphate cements (CPC) represent resorbable, bioactive, osteoconductive alternatives to bioinert polymethylmethacrylate cement in the treatment of osteoporotic vertebral fractures. To improve their regenerative potential, CPC can be loaded with bone specific growth factors, e.g. bone morphogenic proteins (BMPs) such as BMP-2. The present study aimed at testing an injectable, poly (l-lactide-co-glycolide) acid (PLGA)-fiber reinforced, brushite-forming cement (CPC) containing low-dose bone morphogenetic protein BMP-2 in a sheep lumbar osteopenia model.

Methods: Bone defects (diameter 5 mm) were placed in aged, osteopenic female sheep, treated with PLGA-fiber-reinforced CPC without (L4) or with BMP-2 (L5; 1, 5, 100, and 500 μg BMP-2; n=5-6 each), and compared with an untouched control (L1). Three and 9 months post-operation, effects of CPC±BMP-2 were documented by osteodensitometry, histomorphometry, micro-CT, and biomechanical testing.

Results: Compared to untouched controls, CPC±BMP-2 numerically or significantly improved all bone formation, bone resorption, and bone structure parameters. These effects were observed at 3 and 9 months, but were less pronounced for some parameters at 9 months. Compared to CPC without BMP-2, additional significant effects of BMP-2 were demonstrated for bone structure (bone volume/total volume, trabecular thickness, trabecular number) and formation (osteoid surface/bone surface and mineralizing surface/bone surface), as well as for the compressive strength. The BMP-2 effects on bone formation at 3 and/or 9 months were dose-dependent, with 5 to 100 µg as the optimal dosage.

Conclusions: BMP-2 significantly enhanced the bone formation induced by a PLGA-fiber reinforced CPC in sheep lumbar osteopenia. A single local dose as low as ≤ 100 µg BMP-2 was sufficient to augment middle to long-term bone formation. The novel CPC+BMP-2 may thus represent an alternative to the bioinert, supraphysiologically stiff polymethylmethacrylate cement presently used to treat osteoporotic vertebral fractures by vertebroplasty/kyphoplasty.

Speaker:
Francesca Gunnella
University Hospital Jena
Additional Authors:
  • Dr. Elke Kunisch
    Universitätsklinikum Jena
  • Dr. Stefan Maenz
    Aesculap AG
  • Dr. Bernhard Illerhaus
    Bundesanstalt für Materialforschung und -prüfung (BAM)
  • Dr. Matthias Bungartz
    Waldkrankenhaus Rudolf Elle GmbH
  • Dr. Olaf Brinkmann
    Waldkrankenhaus Rudolf Elle GmbH
  • Dr.-Ing. Jörg Bossert
    Friedrich-Schiller-Universität Jena
  • Prof. Dr. Raimund W. Kinne
    Universitätsklinikum Jena