Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
Quantitative proteomic analysis reveals induction of premature senescence in human umbilical vein endothelial cells exposed to chronic low-dose rate gamma radiation.
Proteomics 13, 1096-1107 (2013)
Chronic low-dose ionizing radiation induces cardiovascular disease in human populations but the mechanism is largely unknown. We suggested that chronic radiation exposure may induce endothelial cell senescence that is associated with vascular damage in vivo. We investigated whether chronic radiation exposure is causing a change in the onset of senescence in endothelial cells in vitro. Indeed, when exposed to continuous low-dose rate gamma radiation (4.1 mGy/h), primary human umbilical vein endothelial cells (HUVECs) initiated senescence much earlier than the nonirradiated control cells. We investigated the changes in the protein expression of HUVECs before and during the onset of radiation-induced senescence. Cellular proteins were quantified using isotope-coded protein label technology after 1, 3, and 6 weeks of radiation exposure. Several senescence-related biological pathways were influenced by radiation, including cytoskeletal organization, cellcell communication and adhesion, and inflammation. Immunoblot analysis showed an activation of the p53/p21 pathway corresponding to the progressing senescence. Our data suggest that chronic radiation-induced DNA damage and oxidative stress result in induction of p53/p21 pathway that inhibits the replicative potential of HUVECs and leads to premature senescence. This study contributes to the understanding of the increased risk of cardiovascular diseases seen in populations exposed to chronic low-dose irradiation.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
Cell Biology ; Endothelium ; Icpl ; Ionizing Radiation ; Senescence; Plasminogen-activator Inhibitor ; Chernobyl Emergency Workers ; Replicative Senescence ; Ionizing-radiation ; Life-span ; Mortality Experience ; Apoe(-/-) Mice ; Early-passage ; Erm Proteins ; Factor Mif
ISSN (print) / ISBN
1615-9853
e-ISSN
1615-9861
Zeitschrift
Proteomics
Quellenangaben
Band: 13,
Heft: 7,
Seiten: 1096-1107
Verlag
Wiley
Nichtpatentliteratur
Publikationen
Begutachtungsstatus
Peer reviewed