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Updated: Sep 18, 2025
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In vitro Cell Migration and Invasion Assays
Published on: June 1, 2014
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Cytoplasmic anillin and Ect2 promote RhoA/myosin II-dependent confined migration and invasion
Avery T Tran1,2, Emily O Wisniewski1,2, Panagiotis Mistriotis3,4,5
1Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, MD, USA.
Nature Materials
|June 26, 2025
Summary
The scaffolding proteins anillin and Ect2, typically nuclear, move to the cytoplasm during confined cell migration. Their interaction drives RhoA/ROCK/myosin II activation, promoting cancer cell invasion and metastasis.
Area of Science:
- Cell Biology
- Cancer Research
- Biophysics
Background:
- Metastatic cancer progression involves cell migration in confined spaces, but underlying mechanisms are unclear.
- Anillin and Ect2 are known nuclear proteins crucial for cell division (cytokinesis).
Purpose of the Study:
- To investigate the role of anillin and Ect2 in confined cell migration during cancer metastasis.
- To elucidate the molecular mechanisms linking mechanical confinement to invasive cell behavior.
Main Methods:
- Utilized biomimetic microfluidic models to simulate mechanically confined environments.
- Investigated recruitment of anillin and Ect2 to the plasma membrane using advanced microscopy.
- Assessed the requirement of Ect2's guanine nucleotide exchange activity and RhoA-GTPase signaling.
Main Results:
- Anillin and Ect2 are present in the cytoplasm of interphase cells promoting confined migration.
- Mechanical confinement triggers actomyosin-binding-dependent anillin recruitment to cell poles, scaling with stiffness.
- Ect2's activity is essential for RhoA-GTPase-mediated myosin II activation, enhancing invasion, blebbing, and extravasation.
- Nuclear envelope rupture amplifies cytoplasmic anillin and Ect2, further promoting migration.
Conclusions:
- Anillin and Ect2 cooperate to mediate mechanoadaptation and invasive cancer progression.
- The RhoA/ROCK/myosin II pathway is critical for anillin and Ect2-driven confined cell migration.
- Findings reveal novel cytoplasmic roles for anillin and Ect2 in cancer metastasis.
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