Organoids Find Gene Switch Restoring Nerve Regrowth
SkimNews Take
The ability to reverse mature neurons' loss of regrowth suggests that the "irreversible" nature of nerve damage is a developmental stage-specific characteristic, not an inherent biological limitation.
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- Cambridge researchers created miniature brain‑and‑spinal‑cord organoids that formed functional neural circuits capable of triggering muscle contractions.
- The organoids maintained for over a year showed that axon regrowth after injury is possible up to ~day 150 of development, after which it sharply declines.
- A gene network acting as a biological switch was identified as limiting axon growth in maturing human neurons.
- Dr. András Lakatos' team blocked key regulators of this network, restoring axon regrowth in mature organoid neurons.
- Lynestrenol, an existing hormone drug, dramatically boosted axon regrowth in damaged neurons when tested in the organoid model.
- Cell Reports published the study (2026) and noted funding from UK Research and Innovation Medical Research Council and Spinal Research.
Why it matters: The ability to reactivate axon growth provides a concrete target for therapies aimed at spinal‑cord injury, motor‑neuron disease and multiple sclerosis, offering patients a path to functional recovery while also delivering a human‑based platform that could reduce reliance on animal testing.
