synthetic cell-cell signaling using designed ligand-receptor pairs

This engineered cell-cell signaling system uses designed ligand-receptor pairs to couple cells and induce synchronized oscillations in presomitic mesoderm organoids. The paper further states that oscillatory coupling can recover synchronized oscillation in Delta-Notch-deficient PSM cells.

The approach requires synthetic ligand-receptor pairs and a PSM organoid or PSM cell system in which oscillatory synchronization can be measured. The abstract also indicates that ligand intracellular domains are important for dynamic communication behavior.

It provides a synthetic way to restore or impose population-level synchronization of the segmentation clock when endogenous coupling is absent or insufficient. This addresses how cell-cell signaling can coordinate oscillatory gene expression across a cell population.

The abstract does not show that any synthetic coupling is sufficient, because nonoscillatory coupling failed to recover synchronized oscillation. It also does not establish broad performance outside organoids, artificial tissues, and the reported PSM context.

The paper contrasts this synthetic signaling approach with endogenous Delta-Notch signaling and with nonoscillatory coupling. Nonoscillatory coupling is explicitly reported as insufficient for recovery.