Unraveling cell processes: interference imaging interwoven with data analysis
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Unraveling cell processes: interference imaging interwoven with data analysis. / Brazhe, Nadezda; Brazhe, Alexey; Pavlov, A N; Erokhova, L A; Yusipovich, A I; Maksimov, G V; Mosekilde, Erik; Sosnovtseva, Olga.
I: Journal of Biological Physics, Bind 32, Nr. 3-4, 01.10.2006, s. 191-208.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Unraveling cell processes: interference imaging interwoven with data analysis
AU - Brazhe, Nadezda
AU - Brazhe, Alexey
AU - Pavlov, A N
AU - Erokhova, L A
AU - Yusipovich, A I
AU - Maksimov, G V
AU - Mosekilde, Erik
AU - Sosnovtseva, Olga
PY - 2006/10/1
Y1 - 2006/10/1
N2 - The paper presents results on the application of interference microscopy and wavelet-analysis for cell visualization and studies of cell dynamics. We demonstrate that interference imaging of erythrocytes can reveal reorganization of the cytoskeleton and inhomogenity in the distribution of hemoglobin, and that interference imaging of neurons can show intracellular compartmentalization and submembrane structures. We investigate temporal and spatial variations of the refractive index for different cell types: isolated neurons, mast cells and erythrocytes. We show that the refractive dynamical properties differ from cell type to cell type and depend on the cellular compartment. Our results suggest that low frequency variations (0.1-0.6 Hz) result from plasma membrane processes and that higher frequency variations (20-26 Hz) are related to the movement of vesicles. Using double-wavelet analysis, we study the modulation of the 1 Hz rhythm in neurons and reveal its changes under depolarization and hyperpolarization of the plasma membrane. We conclude that interference microscopy combined with wavelet analysis is a useful technique for non-invasive cell studies, cell visualization, and investigation of plasma membrane properties.
AB - The paper presents results on the application of interference microscopy and wavelet-analysis for cell visualization and studies of cell dynamics. We demonstrate that interference imaging of erythrocytes can reveal reorganization of the cytoskeleton and inhomogenity in the distribution of hemoglobin, and that interference imaging of neurons can show intracellular compartmentalization and submembrane structures. We investigate temporal and spatial variations of the refractive index for different cell types: isolated neurons, mast cells and erythrocytes. We show that the refractive dynamical properties differ from cell type to cell type and depend on the cellular compartment. Our results suggest that low frequency variations (0.1-0.6 Hz) result from plasma membrane processes and that higher frequency variations (20-26 Hz) are related to the movement of vesicles. Using double-wavelet analysis, we study the modulation of the 1 Hz rhythm in neurons and reveal its changes under depolarization and hyperpolarization of the plasma membrane. We conclude that interference microscopy combined with wavelet analysis is a useful technique for non-invasive cell studies, cell visualization, and investigation of plasma membrane properties.
U2 - 10.1007/s10867-006-9012-1
DO - 10.1007/s10867-006-9012-1
M3 - Journal article
C2 - 19669463
VL - 32
SP - 191
EP - 208
JO - Journal of Biological Physics
JF - Journal of Biological Physics
SN - 0092-0606
IS - 3-4
ER -
ID: 33812601