Crossref journal-article
Proceedings of the National Academy of Sciences
Proceedings of the National Academy of Sciences (341)
Abstract

We report here that living cells and nuclei are hard-wired such that a mechanical tug on cell surface receptors can immediately change the organization of molecular assemblies in the cytoplasm and nucleus. When integrins were pulled by micromanipulating bound microbeads or micropipettes, cytoskeletal filaments reoriented, nuclei distorted, and nucleoli redistributed along the axis of the applied tension field. These effects were specific for integrins, independent of cortical membrane distortion, and were mediated by direct linkages between the cytoskeleton and nucleus. Actin microfilaments mediated force transfer to the nucleus at low strain; however, tearing of the actin gel resulted with greater distortion. In contrast, intermediate filaments effectively mediated force transfer to the nucleus under both conditions. These filament systems also acted as molecular guy wires to mechanically stiffen the nucleus and anchor it in place, whereas microtubules acted to hold open the intermediate filament lattice and to stabilize the nucleus against lateral compression. Molecular connections between integrins, cytoskeletal filaments, and nuclear scaffolds may therefore provide a discrete path for mechanical signal transfer through cells as well as a mechanism for producing integrated changes in cell and nuclear structure in response to changes in extracellular matrix adhesivity or mechanics.

Bibliography

Maniotis, A. J., Chen, C. S., & Ingber, D. E. (1997). Demonstration of mechanical connections between integrins, cytoskeletal filaments, and nucleoplasm that stabilize nuclear structure. Proceedings of the National Academy of Sciences, 94(3), 849–854.

Authors 3
  1. Andrew J. Maniotis (first)
  2. Christopher S. Chen (additional)
  3. Donald E. Ingber (additional)
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Dates
Type When
Created 23 years, 1 month ago (July 26, 2002, 10:35 a.m.)
Deposited 1 year, 7 months ago (Jan. 3, 2024, 11:52 p.m.)
Indexed 4 days, 7 hours ago (Aug. 23, 2025, 12:58 a.m.)
Issued 28 years, 6 months ago (Feb. 4, 1997)
Published 28 years, 6 months ago (Feb. 4, 1997)
Published Online 28 years, 6 months ago (Feb. 4, 1997)
Published Print 28 years, 6 months ago (Feb. 4, 1997)
Funders 0

None

@article{Maniotis_1997, title={Demonstration of mechanical connections between integrins, cytoskeletal filaments, and nucleoplasm that stabilize nuclear structure}, volume={94}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.94.3.849}, DOI={10.1073/pnas.94.3.849}, number={3}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Maniotis, Andrew J. and Chen, Christopher S. and Ingber, Donald E.}, year={1997}, month=feb, pages={849–854} }