The Stiff Side of Cancer: How Matrix Mechanics Rewrites Non-Coding RNA Expression Programs

Area of Science:

• Biophysics
• Molecular Biology
• Cancer Research

Background:

• Extracellular matrix (ECM) stiffening is a hallmark of solid tumors.
• Mechanotransduction pathways, involving key hubs like lysyl oxidase (LOX) and focal adhesion kinase (FAK), are activated by increased ECM stiffness.
• These pathways promote tumor progression, invasion, stemness, and therapy resistance.

Purpose of the Study:

• To synthesize evidence on how quantitative changes in matrix stiffness remodel the miRNome and lncRNome.
• To classify mechanosensitive non-coding RNAs (ncRNAs) based on validation methods.
• To review competing endogenous RNA (ceRNA) networks and discuss translational opportunities for targeting mechanosensitive ncRNAs in cancer.

Main Methods:

• Literature synthesis and evidence classification.
• Analysis of studies using direct stiffness manipulation (e.g., tunable hydrogels, AFM) versus indirect associations.
• Review of competing endogenous RNA (ceRNA) networks and their convergence on mechanotransduction nodes.

Main Results:

• ECM stiffening quantitatively remodels the miRNome and lncRNome in both tumor and stromal cells.
• Extracellular vesicle cargo, influenced by stiffness, can reprogram metastatic niches.
• Mechanosensitive ncRNAs are implicated in sustaining aggressive phenotypes in rigid tumor microenvironments.

Conclusions:

• Integrating ECM mechanics with ncRNA regulatory circuits provides a framework for understanding cancer progression in stiff microenvironments.
• Targeting mechanosensitive ncRNAs, potentially combined with anti-stiffening strategies, presents therapeutic opportunities.
• Circulating and exosomal ncRNAs show promise as biomarkers for cancer detection and monitoring.