23 February 2019
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Int J Med Sci 2018; 15(3):238-247. doi:10.7150/ijms.22563
Platelet-Rich Plasma Injection in Burn Scar Areas Alleviates Neuropathic Scar Pain
1. Division of Plastic Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
Objective: No effective treatments have yet been developed for burn-induced neuropathic pain. Platelet-rich plasma (PRP) has been reported to ameliorate various types of inflammation pain. However, the effect of PRP on burn-induced neuropathic pain is unclear.
Methods: Burn-induced neuropathic pain Sprague-Dawley rat model was confirmed using a mechanical response test 4 weeks after the burn injuries were sustained, following which PRP was injected in the scar area. The rats were divided into four groups (n = 6) as following: Group A, Sham; Group B, Sham + PRP; Group C, Burn; and Group D, Burn + PRP. Four weeks after the PRP injection, the animals were subjected to behavior tests and then sacrificed; specimens were collected for inflammation tests, Masson's trichrome stain and chromosome 10 (PTEN) in the injured skin; and PTEN, phosphorylated mammalian target of rapamycin (p-mTOR), p38, nuclear factor κB (NFκB), chemokine (CC motif) ligand 2 (CCL2), and CCL2 cognate receptor (CCR2) in spinal cord dorsal horns through immunohistochemistry and immunofluorescence staining.
Results: PRP significantly alleviated allodynia in burn-induced neuropathic pain 4 weeks after treatment, and PTEN expression in the skin and spinal cord were significantly increased in group D compared with the group C. p-PTEN, p-mTOR, and CCL2 expression in neuron cells; p-p38 and p-NFκB expression in microglia; and p-JNK and p-NFκB activation in spinal astrocytes decreased significantly in the group D compared with the group C.
Conclusions: PRP is effective in treating burn-induced neuropathic pain and may be used in clinical practice.
Keywords: PRP, Burn, Scar, Neuropathic Pain
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How to cite this article:
Huang SH, Wu SH, Lee SS, Lin YN, Chai CY, Lai CS, Wang HMD. Platelet-Rich Plasma Injection in Burn Scar Areas Alleviates Neuropathic Scar Pain. Int J Med Sci 2018; 15(3):238-247. doi:10.7150/ijms.22563. Available from http://www.medsci.org/v15p0238.htm