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Exploring the Limits of Cell Adhesion under Shear Stress within Physiological Conditions and beyond on a Chip
- Source :
- Diagnostics, Vol 6, Iss 4, p 38 (2016), Diagnostics; Volume 6; Issue 4; Pages: 38, Diagnostics
- Publication Year :
- 2016
- Publisher :
- MDPI AG, 2016.
-
Abstract
- Cell adhesion processes are of ubiquitous importance for biomedical applications such as optimization of implant materials. Here, not only physiological conditions such as temperature or pH, but also topographical structures play crucial roles, as inflammatory reactions after surgery can diminish osseointegration. In this study, we systematically investigate cell adhesion under static, dynamic and physiologically relevant conditions employing a lab-on-a-chip system. We screen adhesion of the bone osteosarcoma cell line SaOs-2 on a titanium implant material for pH and temperature values in the physiological range and beyond, to explore the limits of cell adhesion, e.g., for feverish and acidic conditions. A detailed study of different surface roughness Rq gives insight into the correlation between the cells’ abilities to adhere and withstand shear flow and the topography of the substrates, finding a local optimum at Rq = 22 nm. We use shear stress induced by acoustic streaming to determine a measure for the ability of cell adhesion under an external force for various conditions. We find an optimum of cell adhesion for T = 37 °C and pH = 7.4 with decreasing cell adhesion outside the physiological range, especially for high T and low pH. We find constant detachment rates in the physiological regime, but this behavior tends to collapse at the limits of 41 °C and pH 4.
- Subjects :
- 0301 basic medicine
Materials science
Clinical Biochemistry
Microfluidics
microfluidics
02 engineering and technology
cell adhesion
shear stress
pH
temperature
medical implants
lab-on-a-chip
Article
Osseointegration
03 medical and health sciences
Acoustic streaming
Surface roughness
Shear stress
ddc:530
Cell adhesion
lcsh:R5-920
Adhesion
021001 nanoscience & nanotechnology
030104 developmental biology
Biophysics
0210 nano-technology
Shear flow
lcsh:Medicine (General)
Biomedical engineering
Subjects
Details
- Language :
- English
- ISSN :
- 20754418
- Volume :
- 6
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Diagnostics
- Accession number :
- edsair.doi.dedup.....e9c12001b62e0eacaad923b0fd80b26e