Ubiquitin C-terminal hydrolase-L1 plays a key role in angiogenesis by regulating hydrogen peroxide generated by NADPH oxidase 4
Journal Article
·
· Biochemical and Biophysical Research Communications
- Graduate School of Pharmaceutical Sciences and College of Pharmacy, Ewha Womans University, Seoul, 120-750 (Korea, Republic of)
Ubiquitin C-terminal hydrolase-L1 (UCH-L1), which catalyzes the hydrolysis of ubiquitin esters and amides, is highly expressed in brain. Recently, UCH-L1 has been found to increase cancer cell migration and invasion by modulating hydrogen peroxide generated by NADPH oxidase 4 (NOX4). Because angiogenesis is also mediated by hydrogen peroxide, we explored the role of UCH-L1 in angiogenesis in human umbilical vein endothelial cells (HUVECs). Silencing UCH-L1 suppressed tubule formation in HUVECs, indicating that UCH-L1 promotes angiogenesis in vitro. This was confirmed using in vivo Matrigel plug studies of HUVECs, after overexpressing or silencing UCH-L1. Silencing UCH-L1 significantly suppressed VEGF-induced ROS levels as well as activation of VEGFR, both of which are required for angiogenesis. This study also showed that UCH-L1 promotes angiogenesis of HUVECs, as well as invasion in cancer cells, by up-regulating ROS by deubiquitination of NOX4, suggesting that UCH-L1 plays a key role in angiogenesis of HUVECS by regulating ROS levels by deubiquitination of NOX4.
- OSTI ID:
- 23134408
- Journal Information:
- Biochemical and Biophysical Research Communications, Journal Name: Biochemical and Biophysical Research Communications Journal Issue: 1 Vol. 495; ISSN 0006-291X; ISSN BBRCA9
- Country of Publication:
- United States
- Language:
- English
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