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. 1994 May;66(5):1717–1725. doi: 10.1016/S0006-3495(94)80964-6

Structure and activation dynamics of RBL-2H3 cells observed with scanning force microscopy.

D Braunstein 1, A Spudich 1
PMCID: PMC1275891  PMID: 8061220

Abstract

Surface and subsurface dynamics of Rat Basophilic Leukemia cells, a model system of stimulated secretion, were imaged using Scanning Force Microscopy (SFM) at a rate of 50-60 s/image. Cytoskeletal elements and organelles were tracked within quiescent cells and those activated after IgE receptor crosslinking. In addition, surface waves were observed moving within the plasma membrane. The structures seen in quiescent and activated cells can be correlated with those seen in electron micrographs and topographic SFM images of fixed detergent-extracted cells. Furthermore, images of the detergent-extracted nuclei reveal the presence of numerous nuclear pore complexes. High-magnification images of the nuclear pore complexes show evidence of subunit structure and exhibit dimensions consistent with those reported previously using electron microscopy. The behavior and overall change in morphology of cells observed during activation was consistent with that observed under similar conditions with Differential Interference Contrast microscopy. This study demonstrates that SFM, unlike other techniques, can be used to provide high-resolution information in both fixed and living cells.

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