Inhibiting specific enzymes might unlock cell growth in damaged adult tissues
In short: Researchers who tested a new small-molecule compound found it could trigger cell division in tissues that typically lose the ability to regenerate. By inhibiting Lats kinases—key enzymes in the Hippo signaling pathway—the treatment prevented the suppression of Yap, a protein that promotes growth. The study observed this effect in murine inner ears, mouse heart cells, and human retinal organoids.
This finding is significant because it identifies a potential pharmacological path to restart regeneration in adult mammals, such as restoring hearing or repairing heart tissue. By blocking the Hippo pathway's 'brakes,' the researchers showed that supporting cells could be prompted to multiply and then differentiate into functional sensory cells.
The study utilized high-throughput phenotypic screening, kinase assays, RNA sequencing, and organoid models. A limitation of this research is that it primarily demonstrates potential in initial stages of regeneration rather than full tissue restoration.
Why it matters: Targeting specific signaling pathways could one day help repair tissues that normally cannot heal themselves as adults.
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