January 1, 2000Journal of Biomedical Materials Research
Attachment of astroglial cells to microfabricated pillar arrays of different geometries
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Discussion
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Implication
Experimental study reveals preferential attachment of astroglial cells to microscale pillars over wells or smooth silicon, highlighting surface topography's role in neural implant design.
Key Points
- To investigate the influence of microfabricated silicon topography—specifically pillar arrays and well geometries—on astroglial cell attachment, morphology, and cytoskeletal organization.
- Microfabricated single-crystal silicon substrates using photolithography to generate pillars (0.5–2.0 µm wide, 1.0–5.0 µm gaps, 1.0 µm high) and wells (0.5 µm diameter, 1.0 µm deep, 0.5–2.0 µm gaps).
- Cultured LRM55 astroglial cells and characterized cell adhesion, morphology, and actin and vinculin protein distribution using fluorescence, reflectance, confocal, and scanning electron microscopy.
- LRM55 astroglial cells exhibited a 70% preference for pillar arrays over smooth silicon, whereas only 40% preferred wells over smooth surfaces (ANOVA p < ~0.0003 between pillar and well groups; p > ~0.5 across different pillar dimensions).
- Scanning electron microscopy revealed cells adhered exclusively to the pillar tops without descending into interpillar gaps up to 5.0 µm, accompanied by highly polarized distributions of actin and vinculin.
Cite This Study
Turner et al. (2000) studied this question.