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Shoshi, Astrit: Magnetic lab-on-a-chip for cell analysis : magnetoresistive-based real-time monitoring of dynamic cell-environment interactions. 2013
Inhalt
GMR theory
Interlayer exchange coupling
Quantum well model
Phenomenological model
Giant Magnetoresistance (GMR)
Cell biology
Structure of eukaryotic cells
Dynamic cell-environment interactions
Adhesion and spreading
Migration
Phagocytosis
Real-time monitoring techniques
Refractive optical microscopy
Interference reflection microscopy (IRM)
Total internal reflection fluorescence microscopy (TIRFM)
Surface plasmon resonance microscopy (SPRM)
Whispering gallery mode resonance (WGMR)
Quartz crystal microbalance (QCM)
Capacitive sensing
Magnetoresistive sensing
Magnetic lab-on-a-chip (MAGLab)
Cell cultures
Normal Human Dermal Fibroblasts (NHDF)
Prostate cancer cells (DU145)
Superparamagnetic particles (beads)
Bead structure and magnetic cell-chip requirements
Beads for on-chip real-time monitoring and off-chip phagocytosis
Magnetoresistive biochip
GMR-sensor layout and magnetic characteristics
Magnetoresistive bead detection principle
Dependence of the sensor signal on bead coverage
Simulations
Downhill simplex function minimization
Micromagnetic simulations (OOMMF)
MAGLab system
Polydimethylsiloxane (PDMS) microfluidics
Construction and setup
Magneto-transport measurements
LabView computer control
FEMLAB simulation of magnetic forces in inhomogeneous fields
Magnetic field design
Magnetic forces
3D magnetic manipulation of beads
3D magnetic manipulation of bead-loaded cells
MAGLab operation at molecular level: sample analysis principle
Summary
Basic cell-environment interactions
Cell growth on functionalized surfaces
Cell interactions with MagSense beads
Uptake capacity
Cell interactions with different bead types
Cell viability
Summary
Real-time monitoring of bead phagocytosis during cell spreading
Optical-based cell spreading analysis
GMR-based real-time monitoring of cell spreading
NHDF cells
DU145 cells
Long-term monitoring of internalized beads
Summary
GMR-based real-time cell phagocytosis monitoring
Concept of GMR-based real-time cell phagocytosis monitoring
Real-time cell phagocytosis monitoring
Sample preparation and bead sedimentation
NHDF cells
DU145 cells
Summary
On-chip real-time monitoring of cell migration and detachment
Chip-based cell migration assay
Enzymatic cell detachment
Summary
Summary and outlook
Appendix
Preparation and analytical tools
Thin film deposition
Optical UV-lithography
Etching techniques
Chip fabrication
Scanning electron microscopy
Zeta potential
Evaluation of the sensor bead-surface coverage
Cell biology
Culture medium
Cell passaging
Cell viability and staining
References
Acknowledgments
Curriculum vitae