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miRNA-200c-3p targets talin-1 to regulate integrin-mediated cell adhesion
Gideon Obeng1, Eun Jeong Park2, Michael G Appiah1
1Department of Molecular Pathobiology and Cell Adhesion Biology, Mie University Graduate School of Medicine, Tsu, Mie, 514-8507, Japan.
Scientific Reports
|November 4, 2021
Summary
MicroRNA miR-200c-3p epigenetically regulates cell adhesion by targeting talin 1 (TLN1). This finding reveals a new mechanism controlling integrin activation and cell-matrix interactions, crucial for cellular functions.
Area of Science:
- Cell Biology
- Molecular Biology
- Epigenetics
Background:
- Integrin-mediated cell adhesion is vital for cellular functions and regulated by intracellular signaling.
- Talin (TLN) is a key adaptor protein that triggers integrin activation.
- Epigenetic regulation of talin expression and its impact on integrin activation are not well understood.
Purpose of the Study:
- To investigate the epigenetic regulation of talin 1 (TLN1) expression by microRNA miR-200c-3p.
- To determine the role of miR-200c-3p in modulating integrin activation and cell adhesion.
Main Methods:
- Bioinformatics analysis to identify potential miRNA targets.
- Generation of cell lines with altered miR-200c-3p expression (overexpression and underexpression).
- Assays to measure TLN1 expression, integrin-mediated cell adhesion to fibronectin, and focal adhesion plaque formation.
Main Results:
- Overexpression of miR-200c-3p significantly decreased TLN1 expression and suppressed integrin-mediated cell adhesion.
- Reduced endogenous miR-200c-3p levels increased TLN1 expression, enhancing cell adhesion and focal adhesion formation.
- miR-200c-3p directly targets TLN1 by binding to its 3'-untranslated region (UTR).
Conclusions:
- miR-200c-3p acts as a negative regulator of TLN1 expression.
- This microRNA plays a critical role in controlling integrin activation and cell adhesion.
- The miR-200c-3p/TLN1 axis represents a novel epigenetic mechanism influencing cell-matrix interactions.
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