Comparative analysis of the influence of Fructus Ligustri Lucidi on a rat lumbar disc herniation model

Lumbar disc herniation (LDH) is a term used for a group of conditions, including back pain, femoral nerve pain and sciatica. Currently available treatments and surgical options are insufficient for patients with LDH. Fructus Ligustri Lucidi (FLL) is a herb that is used for treating age-associated diseases. The results of the present study suggested that FLL may be used for treatment of patients with LDH. In the present study, matrix metalloproteinase-1, -3, -8 and -9 (MMP-1, -3, -8 and -9) protein and mRNA expression downregulation was observed in patients with LDH according to western blotting and reverse transcription-quantitative polymerase chain reaction. By contrast, upregulation of interleukin-2 (IL-2), IL-6, IL-8 and tumor necrosis factor- (TNF-) expression was observed in patients with LDH, according to an enzyme-linked immunosorbent assay. Mechanical allodynia was observed in rats with LDH not treated with FLL; however, not in FLL-treated rats. IL-2, IL-6, IL-8 and TNF- expression levels in the serum from untreated rats were significantly higher than that of the FLL-treated rat models. Protein expression levels of MMPs in FLL-treated rats were lower than those in untreated rats. However, the mechanisms underlying the association between FLL and protein expression levels require further investigation.