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Reproducible Mouse Sciatic Nerve Crush and Subsequent Assessment of Regeneration by Whole Mount Muscle Analysis
Published on: February 22, 2012
Spatiotemporal expression of SKIP after rat sciatic nerve crush
Youhua Wang1, Long Long, Jiao Yang
1Department of Orthopaedics, Affiliated Hospital of Nantong University, 20 Xi-Si Road, Nantong, 226001 Jiangsu, People's Republic of China. wangyouhuapro@yahoo.com.cn
Neurochemical Research
|February 8, 2013
Summary
Peripheral nerve crush injury increases Ski-interacting protein (SKIP) in rat sciatic nerves. This upregulation correlates with Schwann cell proliferation during nerve regeneration.
Area of Science:
- Molecular Biology
- Neuroscience
- Cell Biology
Background:
- Ski-interacting protein (SKIP) is a conserved protein involved in splicing and transcription.
- SKIP's role in peripheral nervous system (PNS) injury and regeneration is not well understood.
- SKIP influences cell cycle regulation and growth-promoting pathways.
Purpose of the Study:
- To investigate the spatiotemporal expression of SKIP in the sciatic nerve following injury.
- To determine the relationship between SKIP expression and Schwann cell proliferation after nerve damage.
Main Methods:
- Adult rats underwent acute sciatic nerve crush injury.
- Western Blot analysis was used to quantify SKIP protein levels over time.
- Immunohistochemistry was performed to assess SKIP expression in Schwann cells and its correlation with proliferation markers (PCNA, Ki-67).
Main Results:
- SKIP is expressed in normal sciatic nerves and significantly upregulated after crush injury, peaking at 1 week.
- SKIP levels returned to baseline by 4 weeks post-injury.
- Increased SKIP expression paralleled Proliferating Cell Nuclear Antigen (PCNA) expression, with many SKIP-positive Schwann cells also positive for PCNA and Ki-67.
Conclusions:
- Peripheral nerve crush injury induces SKIP upregulation in the sciatic nerve.
- The observed SKIP upregulation is associated with Schwann cell proliferation, suggesting a role in nerve regeneration.
