Endothelial monolayers do not randomly drift into an organized state—they actively choreograph their own transformation from chaotic arrangements to perfect cellular alignment. This intricate process involves multicellular “strings” that bind and eliminate tiny whirlpools of cellular orientation known as topological defects. This discovery uncovers that living tissues follow sophisticated principles borrowed from physics, revealing a hidden intermediate phase that transforms our understanding of blood vessel formation and repair.
The physics behind ordering of vessels
What makes this finding particularly remarkable is its bridging of two traditionally distinct fields: the abstract mathematics of active matter physics and the complex biological reality of living cells.
In physics, “active nematics” are systems composed of rod-like particles that consume energy to move and align, creating swirling patterns interrupted by singular points—topological defects. These defects resemble the eye of a hurricane within a field of aligned particles, with physicists having developed elegant theories to describe their formation, movement, and annihilation.
