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Int. J. Mol. Sci. 2015, 16(8), 19027-19039;

Human Dermal Stem/Progenitor Cell-Derived Conditioned Medium Improves Senescent Human Dermal Fibroblasts

Amorepacific Corporation R&D Center, 314-1 Bora-dong, Giheung-gu, Yongin-si, Geyonggi-do 446729, Korea
These authors contributed equally to this work.
Authors to whom correspondence should be addressed.
Academic Editor: Wilhelm Bloch
Received: 6 July 2015 / Revised: 27 July 2015 / Accepted: 27 July 2015 / Published: 13 August 2015
(This article belongs to the Special Issue Stem Cell Activation in Adult Organism)
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Adult skin stem cells are recognized as potential therapeutics to rejuvenate aged skin. We previously demonstrated that human dermal stem/progenitor cells (hDSPCs) with multipotent capacity could be enriched from human dermal fibroblasts using collagen type IV. However, the effects of hDSPCs on cellular senescence remain to be elucidated. In the present study, we investigated whether conditioned medium (CM) collected from hDSPC cultures (hDSPC-CM) exhibits beneficial effects on senescent fibroblasts. We found that hDSPC-CM promoted proliferation and decreased the expression level of senescence-associated β-galactosidase in senescent fibroblasts. In addition, p53 phosphorylation and p21 expression were significantly reduced in senescent fibroblasts treated with hDSPC-CM. hDSPC-CM restored the expression levels of collagen type I, collagen type III, and tissue inhibitor of metalloproteinase, and antagonized the increase of matrix metalloproteinase 1 expression. Finally, we demonstrated that hDSPC-CM significantly reduced reactive oxygen species levels by specifically up-regulating the expression level of superoxide dismutase 2. Taken together, these data suggest that hDSPC-CM can be applied as a potential therapeutic agent for improving human aged skin. View Full-Text
Keywords: fibroblast; human dermal stem/progenitor cells; senescence fibroblast; human dermal stem/progenitor cells; senescence

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Jung, J.-Y.; Shim, J.H.; Choi, H.; Lee, T.R.; Shin, D.W. Human Dermal Stem/Progenitor Cell-Derived Conditioned Medium Improves Senescent Human Dermal Fibroblasts. Int. J. Mol. Sci. 2015, 16, 19027-19039.

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