Expression of gp130 family cytokines in fibroblasts derived from young and old MSCs. Expression of CLCF-1, CT-1, IL-11, and LIF measured by quantitative PCR. NS, no statistical significance. Young and old signify cells derived from 3- and 30-mo-old MSCs, respectively. n = 5, 8 for fibroblast derived from young and old MSCs, respectively.