Scientists “Recharge” Damaged Nerves to Ease Pain
Key takeaways
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A new study suggests that restoring healthy mitochondria in damaged nerves can cut long‑lasting pain–related behaviors by half in mice.
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Support cells called satellite glial cells appear to send “fresh” mitochondria into sensory neurons through tiny tunnels, helping them recover.
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The work points to a future where treatments might restore nerve energy supply instead of just blocking pain signals.
Millions of people live with persistent nerve pain that can make even light touch feel intense. Researchers have suspected for years that part of the problem is energetic: when mitochondria inside nerve cells falter, the nerves struggle to function normally and can start sending amplified danger signals.
At Duke University School of Medicine, scientists wanted to know whether directly replenishing mitochondria could help damaged nerves recover. In human tissue samples and mouse models, they tested whether supplying healthy mitochondria—or helping cells share more of their own—could quiet those overactive pain pathways. In some experiments, relief lasted up to 48 hours, suggesting the nerves were doing more than just “going numb” for a moment.
How cells share mitochondria to protect nerves
The team focused on satellite glial cells, which wrap around sensory neurons and act as their local support crew. The study revealed a striking new role for these cells: they appear to pass healthy mitochondria straight into neurons through thin connections known as tunneling nanotubes.
When this mitochondrial hand‑off works well, nerve fibers stay healthier. When it breaks down, nerve endings begin to deteriorate, which can show up as pain, tingling, or numbness—especially in the hands and feet where nerves are longest. By experimentally boosting this mitochondria‑sharing in mice, the researchers saw pain‑related behaviors drop by up to about 50%, hinting that energized nerves are calmer nerves.
A key protein that builds the “tunnels”
To understand how mitochondria physically move between cells, the scientists homed in on a protein called MYO10. This protein turned out to be crucial for building the tunneling nanotubes that connect satellite glial cells to sensory neurons.
They also tried a more direct approach: injecting isolated mitochondria into clusters of sensory nerve cells called dorsal root ganglia. Here, quality mattered. Mitochondria from healthy donors reduced pain behaviors, while mitochondria from people living with blood‑sugar problems did not provide the same benefit—underscoring how important mitochondrial fitness is for nerve repair.
Why this matters for future treatments
Most current approaches to chronic nerve pain focus on dialing down signals after they’ve already gone wrong. This study points to a different strategy: restoring the energy machinery inside the nerves themselves so they can function more normally.
Researchers still need higher‑resolution imaging and more preclinical work to see exactly how these nanotubes deliver mitochondria in living tissue and how safely this process can be nudged. But the results highlight a previously underappreciated communication system between neurons and their support cells—one that might eventually let clinicians “recharge” nerves rather than simply trying to mute them.
References:
- Jing Xu, Yize Li, Charles Novak, Min Lee, Zihan Yan, Sangsu Bang, Aidan McGinnis, Sharat Chandra, Vivian Zhang, Wei He, Terry Lechler, Maria Pia Rodriguez Salazar, Cagla Eroglu, Matthew L. Becker, Dmitry Velmeshev, Richard E. Cheney, Ru-Rong Ji. Mitochondrial transfer from glia to neurons protects against peripheral neuropathy. Nature, 2026; 650 (8103): 951 DOI: 10.1038/s41586-025-09896-x