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Title: Reactive oxygen species mediate oxidized low-density lipoprotein-induced inhibition of oct-4 expression and endothelial differentiation of bone marrow stem cells
Authors: Parthasarathy, Sampath ×
Hao, Hong
Luo, Min
Ahmed, Shabnam
Zhu, Jingjing
Luo, Suxin
Kuppusamy, Periannan
Sen, Chandan K
Verfaillie, Catherine
Tian, Jie
Liu, Zhenguo #
Issue Date: Dec-2010
Publisher: Mary Ann Liebert, Inc.
Series Title: Antioxidants & Redox Signaling vol:13 issue:12 pages:1845-1856
Abstract: This study was to test the hypothesis that oxidized low-density lipoprotein (ox-LDL) modified the behavior of bone marrow stem cells, including proliferation, Oct-4 expression, and their endothelial differentiation through reactive oxygen species (ROS) formation in vitro. Rat bone marrow multipotent adult progenitor cells (MAPCs) were treated with ox-LDL with or without the antioxidant N-acetylcysteine (NAC). Ox-LDL generated a significant amount of ROS in the culture system as measured with electron paramagnetic resonance spectroscopy, and substantially inhibited the proliferation, Oct-4 expression, and endothelial differentiation of MAPCs. ROS production from ox-LDL in the culture system was completely prevented by NAC (1 mM). NAC treatment completely restored endothelial differentiation potential of MAPCs that was diminished by low-dose ox-LDL. NAC also significantly, but not completely, reversed the inhibitory effect of ox-LDL on proliferation and Oct-4 expression in MAPCs. NAC treatment only slightly restored Akt phosphorylation impaired by ox-LDL in the cells. ROS formation was important in the action of ox-LDL on MAPCs, including Oct-4 expression, proliferation, and endothelial differentiation. However, other mechanism(s) like Akt signaling and apoptosis might also play a critical role in mediating the effect of ox-LDL on these cells.
URI: 
ISSN: 1523-0864
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Laboratory of Molecular Oncology (-)
Interdepartemental Stem Cell Institute (-)
Department of Human Genetics - miscellaneous
× corresponding author
# (joint) last author

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