Abstract
Endothelial cell adhesion and barrier function play a critical role in many biological and pathophysiological processes. The decomposition of endothelial cell adhesion and barrier function into cell–cell and cell–matrix components using frequency dependent cellular micro-impedance measurements has, therefore, received widespread application. Few if any studies, however, have examined the precision of these model parameters. This study presents a parameter sensitivity analysis of a representative cellular barrier function model using a concise geometric formulation that includes instrumental data acquisition settings. Both model state dependence and instrumental noise distributions are accounted for within the framework of Riemannian manifold theory. Experimentally acquired microimpedance measurements of attached endothelial cells define the model state domain, while experimentally measured noise statistics define the data space Riemannian metric based on the Fisher information matrix. The results of this analysis show that the sensitivity of cell–cell and cell–matrix impedance components are highly model state dependent and several well defined regions of low precision exist. The results of this study further indicate that membrane resistive components can significantly reduce the precision of the remaining parameters in these models.
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This work was supported by a National Science Foundation CAREER Award (AE), BES-0238905, and in part by the American Heart Association under Grant 0265029B (AE).
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English, A.E., Plaut, C.P. & Moy, A.B. A Riemannian manifold analysis of endothelial cell monolayer impedance parameter precision. J. Math. Biol. 55, 721–743 (2007). https://doi.org/10.1007/s00285-007-0103-9
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DOI: https://doi.org/10.1007/s00285-007-0103-9
Keywords
- Cell–cell adhesion
- Cell–matrix adhesion
- Cellular impedance
- Endothelial
- Information geometry
- Biomedical electrodes
- Biomedical transducers