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Nicolas Hubacz: How Stress Shapes Organ Development

Nicolas Hubacz/LinkedIn

Mar 5, 2026, 15:33

Nicolas Hubacz: How Stress Shapes Organ Development

Nicolas Hubacz, Research and Clinical Products Business Development Manager at Magstim, shared a post on LinkedIn:

“How Stress Shapes Organ Development

As tissues grow, they experience tension, pressure, and strain. In some cases, those forces don’t just deform tissue, they fracture it. And those fractures can be essential for building functional organs.

In early mouse embryos, researchers including Hervé Turlier and Jean-Léon Maître observed fluid pressure building between cells. Tiny bubbles form. Weaker cell-cell junctions rupture. Small cavities coalesce into one large blastocoel.

This controlled hydraulic fracturing transforms a compact sphere of cells into a hollow blastocyst — a critical step before implantation. The process unfolds too quickly to be gene-by-gene directed; once tension differences exist, mechanics takes over.

In the zebrafish heart (see video), mechanical fracture appears again.

As the developing heart begins beating, strain concentrates along its outer curvature. The internal protein scaffold thins and breaks. Muscle cells move into these fractures and form trabeculae — the ridged network required for effective pumping.

Developmental biologist Rashmi Priya and colleagues showed that increasing heart rate increases fractures; slowing the heart reduces them.

Geometry and strain dictate where the tissue yields.

Across organisms, tissues don’t just fold and stretch — they sometimes fail in highly regulated ways to create new architecture.

Fracture, in this context, isn’t pathology. It’s morphogenesis driven by mechanics.”

Proceed to the video attached to the post.

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