The comparison of sponges and PLGA scaffolds impregnated with DBP on growth behaviors of human intervertebral disc cells

We fabricated sponge and poly(lactide-co-glycolide) (PLGA) scaffolds impregnated demineralized bone particle (DBP) (DBP/PLGA) and investigated proper condition to proliferation and phenotype maintenance of intervertebral disc (IVD) cells by comparison between DBP/PLGA scaffold and DBP sponge. DBP/PLGA scaffolds were prepared by solvent casting/salt leaching. Human IVD cells were seeded in scaffolds of two types. Cell viability and proliferation according to scaffolds were analyzed by WST assay and SEM. RT-PCR was assessed to measure mRNA expression of aggrecan and type II collagen of human IVD cells. In WST assay results, cell viability in scaffolds impregnated DBP/PLGA scaffold were higher than DBP sponge. We could observe that disc cell mRNA expressed better in DBP/PLGA scaffold than DBP sponge. We concluded that the using of DBP/PLGA in terms of scaffold fabrication for bio-disc with human IVD cells is helpful growth of disc cells maintenance of phenotypes.