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Studying the Cytoskeleton

Studying the Cytoskeleton

The cytoskeletal architecture can be studied using different microscopic and biochemical techniques. Electron microscopy was instrumental in discovering the cytoskeletal architecture around the 1960s, which allowed obtaining structural information at a high-resolution level. However, the sample preparation procedure often limits this ability in biological samples. Several protocols have been developed over the years to optimize sample preparation. In one of the protocols known as rotary...

Generation of Straight or Branched Actin Filaments

Generation of Straight or Branched Actin Filaments

The straight or branched structure formation of actin filaments is controlled by nucleating proteins such as the formins and Arp2/3 complex. Formin-mediated assembly results in straight filaments, whereas Arp2/3 protein complex-mediated assembly results in branched actin filaments.
Arp2/3 Complex
Arp2/3 complex is a seven-subunit complex consisting of two proteins similar to actin- Arp2 and Arp3, and five other subunits that help keep Arp2 and Arp3 inactive. When required, the complex is...

Adaptability of Cytoskeletal Filaments

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...

Cytoskeletal Coordination in Cell Migration

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...

Actin Polymerization and Cell Motility

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.

Introduction to Actin

Introduction to Actin

Actin is a highly conserved cytoskeletal protein found abundantly in eukaryotic cells. It constitutes 10% weight of the total cellular protein in muscle cells, while in non-muscle cells, it is lower and makes up around 1–5 percent of the total cell protein. Actin found in the unicellular amoebae and complex multicellular animals is around 80% similar, demonstrating their conservation over a billion years of evolution. Actin coding genes are conserved within species and across different species.

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Related Experiment Video

Updated: May 8, 2026

A Time-Efficient Fluorescence Spectroscopy-Based Assay for Evaluating Actin Polymerization Status in Rodent and Human Brain Tissues

A Time-Efficient Fluorescence Spectroscopy-Based Assay for Evaluating Actin Polymerization Status in Rodent and Human Brain Tissues

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Validation of an algorithm to quantify changes in actin cytoskeletal organization.

Howard Vindin¹, Leanne Bischof, Peter Gunning

¹1Oncology Research Unit, School of Medical Sciences, University of New South Wales, Sydney, NSW, Australia.

Journal of Biomolecular Screening

|September 11, 2013

Summary

A new algorithm quantifies actin cytoskeleton changes, aiding the development of anti-cancer drugs targeting cellular structures. This high-throughput method enables efficient screening for novel anticytoskeletal agents.

Keywords:

actin cytoskeleton drug development high throughput image analysis

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Last Updated: May 8, 2026

A Time-Efficient Fluorescence Spectroscopy-Based Assay for Evaluating Actin Polymerization Status in Rodent and Human Brain Tissues

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Published on: June 3, 2021

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Published on: May 12, 2018

Aip1p Dynamics Are Altered by the R256H Mutation in Actin

Aip1p Dynamics Are Altered by the R256H Mutation in Actin

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Area of Science:

Cell Biology
Biochemistry
Drug Discovery

Background:

The actin cytoskeleton is crucial for cell survival and cancer progression, making it a key target for chemotherapy.
Current methods lack high-throughput quantification of actin cytoskeleton changes, hindering drug development and research.

Purpose of the Study:

To validate a linear feature detection algorithm for quantifying actin filament organization changes.
To establish a high-throughput method for assessing anticytoskeletal agents.

Main Methods:

Validation of a linear feature detection algorithm for actin cytoskeleton analysis.
Application of the algorithm using fluorescence microscopy and high-content imaging.
Testing with established and novel anticytoskeletal agents in a cell-based system.

Main Results:

The algorithm accurately quantifies changes in actin filament organization.
Demonstrated ability to measure cytoskeletal disruption caused by anticytoskeletal agents.
Successful application in both fluorescence microscopy and high-content imaging approaches.

Conclusions:

The validated algorithm provides a robust tool for measuring actin cytoskeleton organization.
This method enables high-throughput screening of compounds targeting the cytoskeleton in cancer and other diseases.
Facilitates research into cytoskeletal dynamics and the development of novel anticytoskeletal drugs.