PHYSIOLOGICAL REVIEWS   Vol. 78 No. 3 July 1998, pp. 763-781
Copyright ©1998 The American Physiological Society

The Cytoskeleton and Cell Signaling: Component Localization and Mechanical Coupling

PAUL A. JANMEY

Experimental Medicine Division, Brigham and Women's Hospital, Program in Biological and Biomedical Sciences, Harvard Medical School, Boston, Massachusetts

Janmey, Paul A. The Cytoskeleton and Cell Signaling: Component Localization and Mechanical Coupling. Physiol. Rev. 78: 763-781, 1998.  The three-dimensional intracellular network formed by the filamentous polymers comprising the cytoskeletal affects the way cells sense their extracellular environment and respond to stimuli. Because the cytoskeleton is viscoelastic, it provides a continuous mechanical coupling throughout the cell that changes as the cytoskeleton remodels. Such mechanical effects, based on network formation, can influence ion channel activity at the plasma membrane of cells and may conduct mechanical stresses from the cell membrane to internal organelles. As a result, both rapid responses such as changes in intracellular Ca²⁺ and slower responses such as gene transcription or the onset of apoptosis can be elicited or modulated by mechanical perturbations. In addition to mechanical features, the cytoskeleton also provides a large negatively charged surface on which many signaling molecules including protein and lipid kinases, phospholipases, and GTPases localize in response to activation of specific transmembrane receptors. The resulting spatial localization and concomitant change in enzymatic activity can alter the magnitude and limit the range of intracellular signaling events.

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				M. Nakamura, M. Sunagawa, T. Kosugi, and N. Sperelakis Actin filament disruption inhibits L-type Ca2+ channel current in cultured vascular smooth muscle cells Am J Physiol Cell Physiol, August 1, 2000; 279(2): C480 - C487. [Abstract] [Full Text] [PDF]

				A. Baritussio, A. Alberti, D. Armanini, F. Meloni, and D. Bruttomesso Different pathways of degradation of SP-A and saturated phosphatidylcholine by alveolar macrophages Am J Physiol Lung Cell Mol Physiol, July 1, 2000; 279(1): L91 - L99. [Abstract] [Full Text] [PDF]

				Y. G. Wang, A. M Samarel, and S. L Lipsius Laminin acts via {beta}1 integrin signalling to alter cholinergic regulation of L-type Ca2+ current in cat atrial myocytes J. Physiol., July 1, 2000; 526(1): 57 - 68. [Abstract] [Full Text] [PDF]

				B. Ressler, R. T. Lee, S. H. Randell, J. M. Drazen, and R. D. Kamm Molecular responses of rat tracheal epithelial cells to transmembrane pressure Am J Physiol Lung Cell Mol Physiol, June 1, 2000; 278(6): L1264 - L1272. [Abstract] [Full Text] [PDF]

				B. P. Helmke, R. D. Goldman, and P. F. Davies Rapid Displacement of Vimentin Intermediate Filaments in Living Endothelial Cells Exposed to Flow Circ. Res., April 14, 2000; 86(7): 745 - 752. [Abstract] [Full Text] [PDF]

				P. He, M. Zeng, and F. E. Curry Dominant role of cAMP in regulation of microvessel permeability Am J Physiol Heart Circ Physiol, April 1, 2000; 278(4): H1124 - H1133. [Abstract] [Full Text] [PDF]

				E. Marchi, W. Liu, and V. C. Broaddus Mesothelial cell apoptosis is confirmed in vivo by morphological change in cytokeratin distribution Am J Physiol Lung Cell Mol Physiol, March 1, 2000; 278(3): L528 - L535. [Abstract] [Full Text] [PDF]

				Y Shafrir, D ben-Avraham, and G Forgacs Trafficking and signaling through the cytoskeleton: a specific mechanism J. Cell Sci., January 8, 2000; 113(15): 2747 - 2757. [Abstract] [PDF]