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Abstract Title:

Apple ethanol extract promotes proliferation of human adult stem cells, which involves the regenerative potential of stem cells.

Abstract Source:

Nutr Res. 2016 Sep ;36(9):925-36. Epub 2016 Jun 26. PMID: 27632912

Abstract Author(s):

Jienny Lee, Moon Sam Shin, Mi Ok Kim, Sunghee Jang, Sae Woong Oh, Mingyeong Kang, Kwangseon Jung, Yong Seek Park, Jongsung Lee

Article Affiliation:

Jienny Lee

Abstract:

Tissue regeneration using adult stem cells (ASCs) has significant potential as a novel treatment for many degenerative diseases. Previous studies have established that age negatively affects the proliferation status and differentiation potential of ASCs, suggesting a possible limitation in their potential therapeutic use. Therefore, we hypothesized that apple extract might exert beneficial effects on ASCs. The specific objectives were to investigate the proliferative effect of apple ethanol extract on human adipose tissue-derived mesenchymal stem cells (ADSCs) and human cord blood-derived mesenchymal stem cells (CB-MSCs), and identify the possible molecular mechanisms. Apple extract promoted proliferation of ADSCs and CB-MSCs as determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and Click-iT 5-ethynyl-2'-deoxyuridine flow cytometry assays. In addition, phosphorylation of p44/42 MAPK (ERK), mammalian target of rapamycin (mTOR), p70 S6 kinase (p70S6K), S6 ribosomal protein (S6RP), eukaryotic initiation factor (eIF) 4B and eIF4E was induced stepwise in ADSCs. Furthermore, apple extract significantly induced the production of vascular endothelial growth factor and interleukin-6 in both ADSCs and CB-MSCs. Similarly, apple extract-induced phosphorylation of the mTOR/p70S6K/S6RP/eIF4B/eIF4E pathway was blocked by pretreatment with PD98059, a specific ERK inhibitor. These results indicate that apple extract-induced proliferation of ADSCs under serum-free conditions is mediated by ERK-dependent cytokine production. Moreover, the beneficial effect of apple extract on proliferation of ASCs may overcome the limitation in therapeutic use of stem cells in tissue regeneration and maintenance of stem cell homeostasis.

Study Type : In Vitro Study
Additional Links
Pharmacological Actions : Regenerative : CK(52) : AC(28)
Additional Keywords : Adult Stem Cells : CK(2) : AC(1)

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Sayer Ji
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