Analysis of the early adaptive response of endothelial cells to hypoxia via a long serial analysis of gene expression.
Activation of endothelial cells in humans is an early event in the response to hypoxia that may contribute to the endothelium's endogenous capacity to reduce tissue injury. To better understand the mechanism underlying this process, we utilized Long Serial Analysis of Gene Expression to study the transcriptome of human vein umbilical endothelial cells (EA.hy926) shortly after the induction of hypoxia. Of over 13,000 genes detected in each pool, 112 showed obvious differences in expression. Metabolic processes such as protein biosynthesis and proteolysis, aminoglycan metabolism, ribonucleotide biosynthesis, adenosine salvage, and lipid metabolism were reinforced. Pro-proliferation and pro-apoptotic states suggest the co-existence of pro- and anti-injury forces in endothelium shortly after the induction of hypoxia. Other adaptive responses include reinforced angiogenesis and vasodilation. Additionally, gene transcription in the endothelium shortly after the induction of hypoxia was regulated independently of HIF-1alpha. Our efforts to elucidate the adaptive response at an early post-hypoxia stage should contribute to further investigation of the protective processes that occur in the endothelium and has potential clinical implications.
Liang
Guang-Ping
GP
State Key Laboratory of Trauma, Burn and Combined Injury, Institute of Burn Research, Southwest Hospital, Third Military Medical University, Chongqing 400038, China.
Su
Yong-Yue
YY
Chen
Jian
J
Yang
Zong-Cheng
ZC
Liu
You-Sheng
YS
Luo
Xiang-Dong
XD
D000222:Adaptation, Physiological / Q000235:genetics*; D015687:Cell Hypoxia / Q000235:genetics; D042783:Endothelial Cells / Q000502:physiology*; D015870:Gene Expression; D020869:Gene Expression Profiling; D006801:Humans; D000860:Hypoxia / Q000235:genetics*