Related Experiment Video
Updated: May 1, 2026
09:13
Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction
Published on: April 1, 2017
14.8K
Distinctive glial and neuronal interfacing on nanocrystalline diamond
Amel Bendali1, Charles Agnès2, Simone Meffert3
1INSERM U968, Institut de la Vision, Paris, France; Sorbonne Universités, UPMC Univ Paris 06 UMR_S968, Institut de la Vision, Paris, France; CNRS UMR7210, Institut de la Vision, Paris, France.
Plos One
|March 26, 2014
Summary
Nanocrystalline diamond enables direct neuron interfacing for visual prostheses, unlike traditional biomaterials. This biocompatible diamond supports neuron survival and growth without protein coatings, a significant advancement for neural implants.
Area of Science:
- Biomaterials Science
- Neuroscience
- Regenerative Medicine
Background:
- Direct electrode/neuron interfacing is crucial for high-resolution neuronal stimulation in visual prostheses.
- Biomaterial interfaces typically require glial cells or protein coatings for neuronal integration.
- Nanocrystalline diamond offers mechanical stability and a wide electrochemical potential window for tissue stimulation.
Purpose of the Study:
- To investigate the biocompatibility of nanocrystalline diamond for direct neuronal interfacing.
- To compare neuron and glial cell growth on nanocrystalline diamond versus glass with and without protein coatings.
- To determine if protein coatings influence neuron-diamond interactions.
Main Methods:
- Culturing adult rat retinal cells (glial cells, bipolar neurons, retinal ganglion cells) on glass and nanocrystalline diamond substrates.
- Utilizing protein coatings on substrates to assess their impact on cell survival and neurite outgrowth.
- Comparing cell behavior on patterned versus bare surfaces to evaluate preferential growth.
Main Results:
- Glial cells and retinal neurons exhibited similar growth on both glass and nanocrystalline diamond.
- Protein coatings enhanced cell survival, especially for glial cells.
- Purified retinal ganglion cells showed superior survival and neurite extension on bare nanocrystalline diamond compared to coated surfaces or glass.
- Neurons did not preferentially grow on patterned protein areas on diamond, unlike on glass.
Conclusions:
- Nanocrystalline diamond demonstrates excellent biocompatibility, facilitating direct neuronal interfacing.
- Protein coatings are not necessary for neuron survival on nanocrystalline diamond and may even be detrimental.
- This finding is significant for developing advanced neural prosthetics and interfaces.
