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Related Concept Videos

Mechanisms of Membrane-bending01:15

Mechanisms of Membrane-bending

The living membranes are flexible due to their fluid mosaic nature; however, their bending into different shapes is an active process regulated by specific lipids and proteins. The membrane bending can be transient as seen in vesicles or stable for a long time as in microvilli. Cells regulate the size, location, and duration of the membrane curvature.
Membrane bending can happen due to intrinsic changes in lipid composition or extrinsic association with different proteins. The proteins involved...
Adaptability of Cytoskeletal Filaments01:12

Adaptability of Cytoskeletal Filaments

The cytoskeleton is a complex dynamic structure performing varied functions based on cellular requirements. The adaptability of the individual filaments in the cytoskeleton determines their ability to perform various functions within the cell. It can undergo rapid reorganization during processes like cell division or remain stable for several hours as in the interphase. The adaptability of these filaments depends on stringent regulatory mechanisms. The microfilament and microtubules of the...
The Role of Actin and Myosin in Non-muscle Cells01:10

The Role of Actin and Myosin in Non-muscle Cells

Actin and myosin or actomyosin filaments also play a significant role in cells other than those involved in muscle contraction (which occurs within the sarcomere of muscle cells). The mechanism of non-muscle cell contractile bundles was first observed in Dictyostelium and Acanthamoeba. In non-muscle cells, two bundles are commonly found: stress fibers and actomyosin adherence belts. These contractile bundles are smaller and less organized than the ones found in muscle cells. They  are held...
Cell-matrix's Response to Mechanical Forces01:13

Cell-matrix's Response to Mechanical Forces

In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
Anchoring junctions mechanically attach a cell to the...
Actin Polymerization and Cell Motility01:13

Actin Polymerization and Cell Motility

Actin is a family of globular proteins that are highly abundant in eukaryotic cells. It makes up approximately 1-5% of total cell protein concentration. Actin monomers polymerize to form a complex network of polarized filaments, the actin cytoskeleton, that plays a crucial role in many cellular processes, including cell motility, division, endocytosis, and metastasis of cancer cells.
Actin cytoskeleton dynamics can produce pushing, pulling, and resistance forces that help the cell to migrate.
Cytoskeletal Coordination in Cell Migration01:32

Cytoskeletal Coordination in Cell Migration

A migrating cell changes its shape during the cyclic events of attachment and detachment from the substratum and repositions the cell organelles correspondingly. These complex events are orchestrated by the dynamic cytoskeletal network comprising actin filaments, intermediate filaments, and microtubules. Cytoskeletal crosstalk — the direct and indirect communication between the different components — is crucial for this coordination. Direct communication involves various linker proteins that...

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Related Experiment Video

Updated: Jun 4, 2026

Simple Polyacrylamide-based Multiwell Stiffness Assay for the Study of Stiffness-dependent Cell Responses
07:45

Simple Polyacrylamide-based Multiwell Stiffness Assay for the Study of Stiffness-dependent Cell Responses

Published on: March 25, 2015

Cell shape and substrate rigidity both regulate cell stiffness.

Shang-You Tee1, Jianping Fu, Christopher S Chen

  • 1Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA.

Biophysical Journal
|March 1, 2011
PubMed
Summary
This summary is machine-generated.

Cell stiffness is influenced by both the surrounding material (substrate stiffness) and the cell's own size (spread area). These factors interact complexly, affecting cell shape and mechanics.

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Micropipette Aspiration of Substrate-attached Cells to Estimate Cell Stiffness
10:31

Micropipette Aspiration of Substrate-attached Cells to Estimate Cell Stiffness

Published on: September 27, 2012

Related Experiment Videos

Last Updated: Jun 4, 2026

Simple Polyacrylamide-based Multiwell Stiffness Assay for the Study of Stiffness-dependent Cell Responses
07:45

Simple Polyacrylamide-based Multiwell Stiffness Assay for the Study of Stiffness-dependent Cell Responses

Published on: March 25, 2015

Micropipette Aspiration of Substrate-attached Cells to Estimate Cell Stiffness
10:31

Micropipette Aspiration of Substrate-attached Cells to Estimate Cell Stiffness

Published on: September 27, 2012

Area of Science:

  • Cell biology
  • Biophysics
  • Mechanobiology

Background:

  • Cells dynamically respond to their microenvironment's physical properties, including substrate stiffness and spatial cues.
  • Cellular shape and cortical stiffness are modulated by these environmental factors.
  • The interplay between substrate stiffness, cell shape, and cell stiffness remains poorly understood.

Purpose of the Study:

  • To investigate the independent and combined effects of substrate stiffness and cell shape on cell cortical stiffness.
  • To elucidate the interaction mechanisms between substrate stiffness, cell shape, and cell mechanics.

Main Methods:

  • Utilized microcontact printing and microfabricated elastomeric post arrays.
  • Independently and simultaneously controlled cell shape and substrate stiffness.
  • Measured changes in cell cortical stiffness in response to varying substrate stiffness and cell spread area.

Main Results:

  • Cell cortical stiffness increases with both substrate stiffness and cell spread area.
  • On soft substrates, substrate stiffness has a greater impact on cell stiffness than cell shape.
  • For cells with limited spread area, cell shape dominance over substrate stiffness is observed, with substrate stiffness no longer affecting cell stiffness.

Conclusions:

  • Cell size and substrate stiffness exhibit a complex interaction influencing cell morphology and mechanics.
  • These findings provide insights into how cells integrate mechanical cues from their environment.
  • Understanding these interactions is crucial for fields like tissue engineering and regenerative medicine.