Biomedical Engineering and Bioengineering Commons^™

Spatial Analysis Of 3′ Phosphoinositide Signaling In Living Fibroblasts: Ii. Parameter Estimates For Individual Cells From Experiments, Ian C. Schneider, Jason M. Haugh

Ian C. Schneider

Fibroblast migration is directed by gradients of platelet-derived growth factor (PDGF) during wound healing. As in other chemotactic systems, it has been shown recently that localized stimulation of intracellular phosphoinositide (PI) 3-kinase activity and production of 3′ PI lipids in the plasma membrane are important events in the signaling of spatially biased motility processes. In turn, 3′ PI localization depends on the effective diffusion coefficient, D, and turnover rate constant, k, of these lipids. Here we present a systematic and direct comparison of mathematical model calculations and experimental measurements to estimate the values of the effective 3′ PI diffusion coefficient, …