Research Article

Identification of Aberrantly Expressed Genes during Aging in Rat Nucleus Pulposus Cells

Figure 3

Volcano plot showed differentially expressed genes between the young and old groups. Volcano plot of differentially expressed genes in young and old group. Left: significantly downregulated genes, which account for 1.8% of total detected probes. Middle: nondifferentially expressed genes. Right: significantly upregulated genes, which account for 2.7% of total detected probes (based on and ). Heat map and hierarchical clustering of DEG profile comparison between the young and old NPCs are included in the supplementary materials.