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Telomerase- and angiogenesis-related gene responses to irradiation in human umbilical vein endothelial cells

Authors
 Hyun Chang ; Sun Young Rha ; Hyun Cheol Chung ; Yong-Bae Kim ; Tae Soo Kim ; Kyu Hyun Park ; Hei-Cheul Jeung 
Citation
 International Journal of Molecular Medicine, Vol.31(5) : 1202~1208, 2013 
Journal Title
 International Journal of Molecular Medicine 
ISSN
 1107-3756 
Issue Date
2013
Abstract
In this study, we investigated the effects of ionizing radiation (IR) on human umbilical vein endothelial cells (HUVECs) in the context of senescence. HUVECs at passage number (PN)1, PN2 and PN3 were exposed to irradiation (2 Gy). The growth rate of the HUVECS was measured by proliferation assay and senescence-associated β-galactosidase assay was used to measure the number of senescent cells. Telomerase activity and the expression of telomerase- and angiogenesis-related genes were measured by telomerase assay and real-time PCR, respectively. The number of senescent cells was significantly increased in the irradiated HUVECs at all PNs. Compared to the controls, telomerase activity, the expression of human telomerase reverse transcriptase (hTERT) and c-Myc in the irradiated HUVECs were downregulated during serial passage. The downregulation of vascular endothelial growth factor (VEGF) was observed in the irradiated HUVECs as the PN increased. The data presented in this study may aid in the understanding of the mechanisms behind IR‑induced EC senescence and telomerase- and angiogenesis‑related gene response.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/86665
DOI
10.3892/ijmm.2013.1300
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Internal Medicine
1. 연구논문 > 1. College of Medicine > Dept. of Radiation Oncology
Yonsei Authors
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Link
 http://www.spandidos-publications.com/ijmm/31/5/1202
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