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Seoul, South Korea

Chae Y.-B.,Dong - Eui University | Lee J.S.,Dong - Eui University | Park H.-J.,Dong - Eui University | Park I.-H.,Dong - Eui University | And 4 more authors.
Environmental Toxicology and Pharmacology | Year: 2012

Advanced adipose-derived stem cell protein extracts (AAPE) were used instead of live stem cells to investigate their effect on oxidative stress and matrix metalloproteinases (MMPs) related to tissue repair in human dermal fibroblasts (HDFs). In this study, it was observed that AAPE at 2μg/ml specifically exhibited scavenging activity of hydrogen peroxide and reducing power. The inhibitory effect of AAPE at 2μg/ml on MMP-2 activity was increased in the presence of phorbol myristate acetate (PMA). In the absence of PMA, AAPE significantly enhanced activities of MMP-1 and MMP-2 in HDFs, respectively. However, the level ofMMP-1 expression was decreased in a dose dependent manner by AAPE. In addition, while the level of extracellular signal-regulated kinases 1 (ERK1) activation was reduced in the presence of AAPE compared to blank, the level that of ERK2 activation was not changed. The expression level of c-Fos, a part of activator protein-1 (AP-1), was increased in nucleus of HDFs. These results reveal that activation of MMPs in the presence of AAPE was increased via AP-1 in HDFs, suggesting that AAPE can be a potential candidate for tissue repair. © 2012 Elsevier B.V. Source

Moon K.M.,Dong - Eui University | Park Y.-H.,Prostemics Research Institute | Lee J.S.,Dong - Eui University | Chae Y.-B.,Dong - Eui University | And 5 more authors.
International Journal of Molecular Sciences | Year: 2012

The beneficial effects of adipose-derived stem cell conditioned medium (ADSC-CM) on skin regeneration have been reported. Although the mechanism of how ADSC-CM promotes skin regeneration is unclear, ADSC-CM contained various growth factors and it is an excellent raw material for skin treatment. ADSC-CM produced in a hypoxia condition of ADSC-in other words, Advanced Adipose-Derived Stem cell Protein Extract (AAPE)-has great merits for skin regeneration. In this study, human primary keratinocytes (HKs), which play fundamental roles in skin tissue, was used to examine how AAPE affects HK. HK proliferation was significantly higher in the experimental group (1.22 μg/mL) than in the control group. DNA gene chip demonstrated that AAPE in keratinocytes (p < 0.05) notably affected expression of 290 identified transcripts, which were associated with cell proliferation, cycle and migration. More keratinocyte wound healing and migration was shown in the experimental group (1.22 μg/mL). AAPE treatment significantly stimulated stress fiber formation, which was linked to the RhoA-ROCK pathway. We identified 48 protein spots in 2-D gel analysis and selected proteins were divided into 64% collagen components and 30% non-collagen components as shown by the MALDI-TOF analysis. Antibody array results contained growth factor/cytokine such as HGF, FGF-1, G-CSF, GM-CSF, IL-6, VEGF, and TGF-β3 differing from that shown by 2-D analysis. Conclusion: AAPE activates HK proliferation and migration. These results highlight the potential of the topical application of AAPE in the treatment of skin regeneration. © 2012 by the authors; licensee MDPI, Basel, Switzerland. Source

Park B.-S.,Leaders Clinic | Kim W.-S.,Sungkyunkwan University | Choi J.-S.,Prostemics Research Institute | Kim H.-K.,Prostemics Research Institute | And 2 more authors.
Biomedical Research | Year: 2010

Adipose-derived stem cells (ADSCs) and their secretomes mediate diverse skin-regeneration effects, such as wound-healing and antioxidant protection, that are enhanced by hypoxia. We investigated the hair-growth-promoting effect of conditioned medium (CM) of ADSCs to determine if ADSCs and their secretomes regenerate hair and if hypoxia enhances hair regeneration. If so, we wanted to identify the factors responsible for hypoxia-enhanced hair-regeneration. We found that ADSC-CM administrated subcutaneously induced the anagen phase and increased hair regeneration in C3H/NeH mice. In addition, ADSC-CM increased the proliferation of human follicle dermal papilla cells (HFDPCs) and human epithelial keratinocytes (HEKs), which are derived from two major cell types present in hair follicles. We investigated the effect of hypoxia on ADSC function using the same animal model in which hypoxia increased hair regrowth. Forty-one growth factors in ADSC-CM from cells cultured under hypoxic or normoxic conditions were analyzed. The secretion of insulin-like growth factor binding protein (IGFBP)-1, IGFBP-2, macrophage colony-stimulating factor (M-CSF), M-CSF receptor, platelet-derived growth factor receptor-β, and vascular endothelial growth factor was significantly increased by hypoxia, while the secretion of epithelial growth factor production was decreased. It is reasonable to conclude that ADSCs promote hair growth via a paracrine mechanism that is enhanced by hypoxia. Source

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