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Emken, Natalie: A coupled bulk-surface reaction-diffusion-advection model for cell polarization. 2016
Inhalt
Contents
Introduction
Motivation
Objective
Outline
Biological preliminaries
The mechanism of cell polarity
The role of the cytoskeleton
The Rho GTPases as key regulators in cell polarity
Yeast as a model system for cell polarity
Yeast polarity pathways and Cdc42 as key regulator
Models for yeast cell polarity
Mathematical preliminaries
Mathematics of reaction-diffusion-advection equations
Conservation principles
Diffusion and advection
Initial and boundary conditions
Systems of reaction-diffusion-advection equations
Stability analysis
Stability of linear systems
Principle of linearized stability
Turing instability and pattern formation
Traveling waves in reaction-diffusion equations
Sobolev spaces and the weak formulations
Coupled bulk-surface PDEs
Numerical methods
Triangulations and ansatz spaces
Finite Elements and the Galerkin method
Finite volume methods
Dual box-grids
Upwind stabilization
Time discretization
Computational implementation
The DUNE framework
DUNE core modules
Dune-multidomain and dune-multidomaingrid
Numerical treatment of coupled bulk-surface problems
Dual grid assembly
The implementation of test problems
A coupled-bulk-surface test problem
An advection-dominated test problem
Discussion
A continuous reaction-diffusion-advection model for yeast cell polarization
The reaction-diffusion system
The reaction-diffusion-advection system
Transport from and to internal membranes
Transport through a domain
Numerical simulations
Polarization in the absence of actin-mediated transport
Enhanced polarization by actin-mediated transport
Actin-mediated transport in the absence of Bem1
Actin-mediated transport in the absence of GDI
Model comparison
Discussion
Derivation of a generic bulk-surface reaction-diffusion-advection system
Model reduction
Non-dimensionalization
The generic coupled bulk-surface reaction-diffusion-advection system
Numerical results
Applications of models from the literature
Linear stability analysis
Numerical results
Discussion
A stochastic approach to vesicular trafficking-mediated cell polarity
Brownian motion on a surface
The two-dimensional case
The three-dimensional case
Derivation of the stochastic model
Numerical results
Discussion
Summary and outlook
Chemical reactions
Spherical harmonics
Glossary
Notation and symbols
Bibliography