Elasticity mapping of living fibroblasts by AFM and immunofluorescence observation of the cytoskeleton
Using the force mapping mode of atomic force microscopy (AFM), we measured spatial distribution of elastic moduli of living mouse fibroblasts (NIH3T3) in a physiological condition. The nuclear portion of the cellular surface is about 10 times softer than the surroundings. Stiffer fibers are confirme...
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| Veröffentlicht in: | Ultramicroscopy 2000-02, Vol.82 (1), p.253-258 |
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| creator | Haga, Hisashi Sasaki, Shigeo Kawabata, Kazushige Ito, Etsuro Ushiki, Tatsuo Sambongi, Takashi |
| description | Using the force mapping mode of atomic force microscopy (AFM), we measured spatial distribution of elastic moduli of living mouse fibroblasts (NIH3T3) in a physiological condition. The nuclear portion of the cellular surface is about 10 times softer than the surroundings. Stiffer fibers are confirmed in the elastic images. In order to investigate origin of the softer nuclear portion and the stiffer fibers, we fixed the identical cells imaged by the AFM, and carried out immunofluorescence observation for three types of cytoskeletal filaments — actin filaments, microtubules, and intermediate filaments, using confocal laser scanning microscopy (CLSM). A comparison between the AFM and the CLSM images revealed that the elasticity of the cells was concerned not only with the distribution of actin network, but also with intermediate filaments, whereas microtubules had no large effect on the measured elasticity. |
| doi_str_mv | 10.1016/S0304-3991(99)00157-6 |
| format | Article |
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| ispartof | Ultramicroscopy, 2000-02, Vol.82 (1), p.253-258 |
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| language | eng |
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| source | MEDLINE; ScienceDirect Journals (5 years ago - present) |
| subjects | 3T3 Cells Actins - ultrastructure Animal cell culture Animals Atomic force microscopy Cytoskeleton Cytoskeleton - ultrastructure Elastic moduli Elastic modulus Elasticity Fibroblast Fibroblasts - chemistry Fibroblasts - ultrastructure Fluorescence Fluorescent Antibody Technique Laser applications Medical imaging Mice Microscopy, Atomic Force - methods Microscopy, Confocal - methods |
| title | Elasticity mapping of living fibroblasts by AFM and immunofluorescence observation of the cytoskeleton |
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