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Related Experiment Video

Updated: Feb 5, 2026

Author Spotlight: Innovative Use of nsPEF to Boost Peripheral Nerve Regeneration
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Inflammaging impairs peripheral nerve maintenance and regeneration.

Robert Büttner1, Alexander Schulz1,2, Michael Reuter1

  • 1Leibniz Institute on Aging, Fritz Lipmann Institute, Jena, Germany.

Aging Cell
|September 1, 2018
PubMed
Summary

Aging impairs peripheral nerve regeneration due to chronic inflammation and altered Schwann cell function. Targeting CC chemokine ligand 11 (CCL11) may enhance nerve repair in older individuals.

Keywords:
aginginflammagingmacrophagesneural regenerationperipheral nervous systemschwann cell

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Area of Science:

  • Neuroscience
  • Immunology
  • Regenerative Medicine

Background:

  • Peripheral nerve regeneration capacity diminishes with age, leading to neuropathies.
  • Schwann cell dysfunction is implicated in age-related nerve maintenance and regeneration failures, but mechanisms are unclear.

Purpose of the Study:

  • To elucidate the molecular mechanisms underlying impaired nerve regeneration in aging.
  • To investigate the role of inflammation and Schwann cell response in age-related nerve repair deficits.

Main Methods:

  • Analysis of inflammatory markers (macrophage infiltration, MCP1, CCL11) in aging nerves.
  • Assessment of Schwann cell dedifferentiation and repair program activation in aged nerves.
  • In vitro and in vivo studies on the effect of CCL11 on Schwann cell differentiation.

Main Results:

  • Aging nerves exhibit chronic inflammation with increased macrophages and elevated MCP1 and CCL11 levels.
  • Schwann cells in aged nerves show partial dedifferentiation and an injury-independent repair activation.
  • Sciatic nerve injury in aged subjects results in delayed immune response, hyperinflammation, and impaired repair.
  • CCL11 was found to inhibit Schwann cell differentiation both in vitro and in vivo.

Conclusions:

  • Increased macrophage infiltration and inflammatory signals, particularly CCL11, impair nerve regeneration in aging by altering Schwann cell behavior.
  • CCL11 is identified as a key factor in age-related decline of nerve regeneration and a potential therapeutic target for improving nerve repair in the elderly.