What question did this study set out to answer?

To investigate how variations in the physical flexibility of adhesion substrates influence cell spreading, cell locomotion, and focal adhesion dynamics.

December 9, 1997Proceedings of the National Academy of SciencesOpen Access

Cell locomotion and focal adhesions are regulated by substrate flexibility

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Population

Normal rat kidney epithelial and 3T3 fibroblastic cells

Comparison

Culturing on a flexible collagen-coated… vs Culturing on rigid substrates

Design

Preclinical

Authors

RPRobert J. PelhamRG Biopharma (United States)YWYu‐li WangInstitute of Pharmacology

Discussion

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Implication

Substrate mechanics may shape cell behavior in cardiovascular tissues; leaves open whether targeting stiffness alters remodeling or requires in vivo confirmation.

Key Points

To investigate how variations in the physical flexibility of adhesion substrates influence cell spreading, cell locomotion, and focal adhesion dynamics.
Cultured normal rat kidney epithelial cells and 3T3 fibroblastic cells on collagen-coated polyacrylamide substrates of varying flexibility with uniform chemical composition.
Assessed focal adhesion organization and dynamics using microinjected fluorescent vinculin alongside treatments with tyrosine phosphatase inhibitor phenylarsine oxide and myosin inhibitors 2,3-butanedione monoxime and KT5926.
Cells on flexible substrates exhibited decreased spreading, heightened motility or lamellipodial activity, irregularly shaped and dynamic focal adhesions, and reduced phosphotyrosine levels at adhesion sites compared to cells on rigid substrates.
Inhibition of tyrosine phosphatase with phenylarsine oxide restored stable focal adhesions on flexible substrates, whereas myosin inhibition on rigid substrates disrupted both vinculin assembly and phosphotyrosine at focal adhesion sites.

Structured PICO

Population

Normal rat kidney epithelial and 3T3 fibroblastic cells

Intervention

Culturing on a flexible collagen-coated polyacrylamide substrate

Comparator

Culturing on rigid substrates

Outcome

Cell spreading, motility, lamellipodial activity, and focal adhesion dynamics

Substrate flexibility regulates cell locomotion and focal adhesion dynamics, demonstrating that cells survey the mechanical properties of their environment via tyrosine phosphorylation and myosin-generated forces.

Cite This Study

Pelham et al. (1997) studied this question.

synapsesocial.com/papers/69d570b975589c71d767dea4 https://doi.org/10.1073/pnas.94.25.13661

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Implication

Substrate mechanics may shape cell behavior in cardiovascular tissues; leaves open whether targeting stiffness alters remodeling or requires in vivo confirmation.

Cell locomotion and focal adhesions are regulated by substrate flexibility

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Cell locomotion and focal adhesions are regulated by substrate flexibility

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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