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Related Concept Videos

Neurogenesis and Regeneration of Nervous Tissue01:15

Neurogenesis and Regeneration of Nervous Tissue

In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...

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Dilong: role in peripheral nerve regeneration.

Yung-Ming Chang1, Wei-Yi Chi, Tung-Yuan Lai

  • 1School of Chinese Medicine, China Medical University, Taichung, Taiwan.

Evidence-Based Complementary and Alternative Medicine : Ecam
|July 30, 2011
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Dilong (earthworm) extract promotes nerve regeneration by stimulating Schwann cell migration and proliferation through MAPK and PI3K/Akt pathways. This research uncovers novel molecular mechanisms for dilong

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Area of Science:

  • Neuroscience
  • Biochemistry
  • Traditional Chinese Medicine

Background:

  • Schwann cell migration and proliferation are vital for nerve regeneration.
  • Dilong (earthworm) has a long history of use in Traditional Chinese Medicine (TCM).
  • The precise molecular mechanisms by which dilong influences Schwann cells remain largely unknown.

Purpose of the Study:

  • To elucidate the molecular mechanisms underlying dilong-induced migration and proliferation in Schwann cells.
  • To investigate the roles of MAPK and PI3K/Akt signaling pathways in dilong's effects.
  • To explore dilong's potential as a therapeutic agent for nerve regeneration.

Main Methods:

  • Utilized RSC96 cells (a Schwann cell line) to study dilong extract effects.
  • Investigated signaling pathways including MAPKs (ERK1/2, p38, JNK) and PI3K/Akt.
  • Employed chemical inhibitors (U0126, SB203580) and RNA interference (siRNA) to validate signaling pathways.

Main Results:

  • Dilong stimulated RSC96 cell migration and proliferation.
  • Dilong induced phosphorylation of ERK1/2 and p38, activating downstream plasminogen activators (PAs) and matrix metalloproteinases (MMPs).
  • Dilong promoted the IGF-I-mediated PI3K/Akt pathway, enhancing cell cycle progression (G1 to S phase) and upregulating proliferation markers (PCNA, cyclins).

Conclusions:

  • Dilong activates specific molecular pathways (MAPK, PI3K/Akt) to enhance Schwann cell migration and proliferation.
  • These findings reveal the underlying mechanisms of dilong's action in nerve regeneration.
  • Dilong shows promise as a novel therapeutic for nerve repair.