Pigment epithelium-derived factor delays cellular senescence of human mesenchymal stem cells in vitro by reducing oxidative stress.

Abstract:

:Mesenchymal stem cells (MSCs) are multipotent progenitor cells that represent a promising approach in the field of regenerative medicine; however, this potential diminishes with senescence. Pigment epithelium-derived factor (PEDF) gives some protection by reducing oxidative stress, which is known to accelerate cellular senescence. Thus we hypothesized that PEDF could delay senescence during MSC expansion by reducing oxidative stress. Proliferation and differentiation potentials, oxidative stress, senescence and p53/p16 expressions have been examined. In MSCs cultured under normoxic conditions treated with PEDF, proliferative lifespan in vitro was significantly increased compared with control group not given PEDF, with ∼10 additional population doublings (PD) occurring before terminal growth arrest. Most of the MSCs cultured under normoxic conditions ceased to proliferate after 20-28 PD, while few senescent cells were found in the hypoxic, PEDF-hypoxic and PEDF-normoxic cultures; this was associated with downregulation of p53 and p16 expression and decreased oxidative stress. PEDF also preserved differentiation potentials of MSCs compared with the control group. Thus PEDF suppression of oxidative stress delays cellular senescence and allows greater expansion of MSCs.

journal_name

Cell Biol Int

authors

Cao Y,Yang T,Gu C,Yi D

doi

10.1002/cbin.10041

subject

Has Abstract

pub_date

2013-04-01 00:00:00

pages

305-13

issue

4

eissn

1065-6995

issn

1095-8355

journal_volume

37

pub_type

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