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Biological Compatibility Profile on Biomaterials for Bone Regeneration
Published on: November 16, 2018
Microstructured titanium regulates interleukin production by osteoblasts, an effect modulated by exogenous BMP-2.
S L Hyzy1, R Olivares-Navarrete, D L Hutton
1Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, 315 Ferst Drive NW, Atlanta, GA 30332-0363, USA.
Acta Biomaterialia
|November 6, 2012
Summary
Microtextured titanium implants reduce inflammation for better bone healing. However, adding bone growth protein 2 (rhBMP-2) can reverse this effect, potentially harming osseointegration.
Area of Science:
- Biomaterials Science
- Cell Biology
- Immunology
Background:
- Microtextured implant surfaces promote osteoblast differentiation and bone integration.
- Recombinant human bone morphogenetic protein 2 (rhBMP-2) can further enhance bone formation.
- The impact of surface modifications and rhBMP-2 on the inflammatory microenvironment is not well understood.
Purpose of the Study:
- To investigate the effects of microtextured titanium surfaces, with and without rhBMP-2, on the inflammatory profile of MG63 cells.
- To elucidate the BMP signaling pathways involved in the cellular response to these surfaces.
Main Methods:
- MG63 cells were cultured on smooth (PT), sandblasted/acid-etched (SLA), and hydrophilic-SLA (modSLA) titanium substrates.
- Expression of pro-inflammatory (IL1b, IL6, IL8, IL17) and anti-inflammatory (IL10) interleukins was measured.
- BMP pathway inhibitors (Smad, TAB/TAK1, PKA) were used to identify signaling mechanisms.
Main Results:
- Rough SLA and modSLA surfaces reduced pro-inflammatory interleukins and increased IL10.
- rhBMP-2 treatment negated these effects, increasing pro-inflammatory interleukins and decreasing IL10 via TAB/TAK signaling.
- Surface microtexture influences the inflammatory response during osseointegration.
Conclusions:
- Microtextured implant surfaces modulate the inflammatory environment, potentially enhancing osseointegration.
- The combination of rhBMP-2 with microtextured implants can alter cellular inflammatory responses, possibly with adverse effects on osseointegration.
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