Abstract
This study aimed to investigate the correlation of long noncoding RNA zinc finger antisense 1 (lncRNA ZFAS1) expression with disease risk, disease severity and inflammatory cytokines levels in lumbar disc degeneration (LDD) patients.83 LDD patients underwent surgery and 28 traumatized, non-LDD patients underwent lumbar disc surgery (controls) were consecutively enrolled in this case-control study. Lumbar disc tissue was obtained during surgery and herniated nucleus pulposus (HNP) was isolated to detect lncRNA ZFAS1 expression and inflammatory cytokines mRNA levels by RT-qPCR, and determine protein levels of inflammatory cytokines by western blot.HNP lncRNA ZFAS1 expression in LDD patients was up-regulated compared with controls (P < .001), and receiver operating characteristic (ROC) curve showed lncRNA ZFAS1 expression disclosed a good predictive value for LDD risk with area under curve (AUC) 0.753 (95% CI 0.646-0.859). And after adjustment by age, gender and body mass index (BMI), lncRNA ZFAS1 (P = .017) remained to be an independent predictive factor for higher LDD risk. In addition, lncRNA ZFAS1 expression was positively associated with Modified Pfirrmann Grade (P = .015). As to inflammatory cytokines, lncRNA ZFAS1 expression was observed to be positively correlated with TNF-α (P = .002), IL-1β (P = .007) and IL-6 (P = .015) mRNAs expressions while reversely associated with IL-10 mRNA level (P = .014); and lncRNA ZFAS1 expression was also positively correlated with protein levels of TNF-α (P = .038) and IL-6 (P = .027) while reversely associated with IL-10 protein expression (P = .039).lncRNA ZFAS1 expression associates with increased risk, elevated disease severity and higher inflammatory cytokines levels in LDD patients.