Research Article

Age-Related Changes in Nucleus Pulposus Mesenchymal Stem Cells: An In Vitro Study in Rats

Figure 6

Cell cycles of NPMSCs (). (a) Representative graphs of cell cycles of young and old NPMSCs determined by flow cytometry. (b) Both young and old NPMSCs were mainly in the G0/G1 phase (>80%), but only small percentages of cells were in the G2/M and S phases. Furthermore, increased G0/G1 and G2/M phase arrest coupled with decreased S phase entry was observed in old NPMSCs compared to young NPMSCs. The data are expressed as means ± SD. indicates .
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