breast-cancer

A single enzyme called MMP14 is essential for cancer invasion—regardless of how cells move.

Using cancer spheroid-3D matrix models, scRNA-seq, and human tissue explants, researchers overturned the dogma that amoeboid cancer cells bypass the need for proteinases. CRISPR/Cas9 deletion of MMP14 abolished tissue-invasive activity in both mesenchymal and amoeboid modes. MMP14-deleted cells showed nuclear envelope damage when invading low-density collagen. MMP14 was required for invasion of live human breast tissue explants. Spatial transcriptomics confirmed MMP14 at invasion fronts in human breast cancers.

Key Findings

Both mesenchymal and amoeboid invasion modes require MMP14—overturning prior dogma
CRISPR deletion of MMP14 abolished tissue-invasive activity in all tested invasion modes
MMP14-deleted cells invading low-density collagen showed nuclear envelope damage
MMP14 required for invasion of live human breast tissue explants
Spatial transcriptomics confirmed MMP14 at invasion fronts in human breast cancers

Implications

MMP14 is a universal invasion requirement and high-priority therapeutic target. Inhibiting MMP14 could potentially prevent metastasis regardless of tumor invasion strategy.

Caveats

Primarily mechanistic study; abstract-only. MMP14 expressed in normal connective tissue—systemic inhibition may cause significant side effects. Human data is correlative.

Source: Proceedings of the National Academy of Sciences of the United States of America — 2026-04-14

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