A) Shown are levels of luminescence detected as part of a cell viability assay performed with hNPCs from the different experimental conditions. B-D) relative levels of gene expression of MMP-3, IL-6 and IL-8 are shown. E-G) relative levels of MMP-3, IL-6 and IL-8 protein in the CM from the different experimental groups are shown. *p<0.05. nviability assay≥4, PCR≥4, nELISA≥5. NBD +: low dose, NBD++: high dose.