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The histomorphological and stereological assessment of rat dorsal root ganglion tissues after various types of sciatic nerve injury

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Erişim

info:eu-repo/semantics/closedAccess

Tarih

2023

Yazar

Delibaş, Burcu
Kaplan, Süleyman

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Künye

Delibaş, B., & Kaplan, S. (2023). The histomorphological and stereological assessment of rat dorsal root ganglion tissues after various types of sciatic nerve injury. Histochemistry and cell biology, 10.1007/s00418-023-02242-0. Advance online publication. https://doi.org/10.1007/s00418-023-02242-0

Özet

Peripheral nerve injuries lead to signifcant changes in the dorsal root ganglia, where the cell bodies of the damaged axons are located. The sensory neurons and the surrounding satellite cells rearrange the composition of the intracellular organelles to enhance their plasticity for adaptation to changing conditions and response to injury. Meanwhile, satellite cells acquire phagocytic properties and work with macrophages to eliminate degenerated neurons. These structural and functional changes are not identical in all injury types. Understanding the cellular response, which varies according to the type of injury involved, is essential in determining the optimal method of treatment. In this research, we investigated the numerical and morphological changes in primary sensory neurons and satellite cells in the dorsal root ganglion 30 days following chronic compression, crush, and transection injuries using stereology, high-resolution light microscopy, immunohistochemistry, and behavioral analysis techniques. Electron microscopic methods were employed to evaluate fne structural alterations in cells. Stereological evaluations revealed no statistically signifcant diference in terms of mean sensory neuron numbers (p>0.05), although a signifcant decrease was observed in sensory neuron volumes in the transection and crush injury groups (p<0.05). Active caspase-3 immunopositivity increased in the injury groups compared to the sham group (p<0.05). While crush injury led to desensitization, chronic compression injury caused thermal hyperalgesia. Macrophage infltrations were observed in all injury types. Electron microscopic results revealed that the chromatolysis response was triggered in the sensory neuron bodies from the transection injury group. An increase in organelle density was observed in the perikaryon of sensory neurons after crush-type injury. This indicates the presence of a more active regeneration process in crush-type injury than in other types. The efect of chronic compression injury is more devastating than that of crush-type injury, and the edema caused by compression signifcantly inhibits the regeneration process.

Kaynak

Histochemistry and Cell Biology

Bağlantı

https://doi.org/10.1007/s00418-023-02242-0
https://hdl.handle.net/11436/8573

Koleksiyonlar

  • PubMed İndeksli Yayınlar Koleksiyonu [2443]
  • Scopus İndeksli Yayınlar Koleksiyonu [5931]
  • TF, Temel Tıp Bilimleri Bölümü Koleksiyonu [691]
  • WoS İndeksli Yayınlar Koleksiyonu [5260]



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