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Peripheral Neuritis Trauma in Pigs: A Neuropathic Pain Model
David Castel1, Itai Sabbag2, Ori Brenner3
1The Neufeld Cardiac Research Institute, Sheba Medical Center, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel.
The Journal of Pain
|October 13, 2015
Summary
A new pig model for chronic neuropathic pain (PNT) shows promise for preclinical studies. This model mimics human pain responses and can test new pain therapies, improving clinical translation.
Area of Science:
- Veterinary Medicine
- Neuroscience
- Pharmacology
Background:
- Rodent models for chronic neuropathic pain have poor clinical translation.
- A need exists for better preclinical models that accurately reflect human pain pathophysiology.
Purpose of the Study:
- To develop and characterize a pig model for chronic neuropathic pain (PNT).
- To assess the translational validity of the pig PNT model for evaluating pain therapies.
Main Methods:
- Surgically induced peripheral neuritis trauma (PNT) in pigs.
- Assessment of allodynia, spontaneous pain behavior, and drug efficacy (gabapentin, morphine, aprepitant).
- Messenger RNA analysis of inflammatory cytokines and neurologic markers at the injury site.
Main Results:
- 75% of pigs developed mechanical and tactile allodynia by day 28 post-surgery.
- PNT-injured pigs maintained ambulation and weight-bearing.
- Gabapentin and morphine dose-dependently reversed pain hypersensitivity and behavior.
- Aprepitant showed no analgesic effect, mirroring human responses but differing from rodents.
Conclusions:
- The pig PNT model demonstrates key features of chronic neuropathic pain.
- This model offers improved translational potential for preclinical pain research.
- It can aid in developing more effective and safer pain therapies.
