UNASSIGNED: Recently several laboratories have reported that radiation induces senescence in endothelial cells. Senescent cells can secrete multiple growth-regulatory proteins, some of which affect @entity5 growth, survival, invasion or angiogenesis. The purpose of this study was to explore the mechanisms of radiation-induced senescence and its effects on angiogenesis in @entity1 umbilical vein endothelial cells (HUVECs). HUVECs were either pretreated with or without @entity38308 prior to irradiation with 0-8 Gy. @entity38308 is a novel, highly specific small-molecule inhibitor of nuclear factor kappa B essential modulator ( @entity10190 ). MTT assays showed that in HUVECs untreated with @entity38308 , there was an increase in the number of radiation-induced senescence-like endothelial cells 5 days after 8 Gy irradiation, while pretreatment with @entity38308 significantly ameliorated the induction in senescence of HUVECs compared to the control group. Electrophoretic mobility shift assay (EMSA) showed that pretreatment with @entity38308 inhibited the radiation-induced NF-kB activation, which regulates cell fate in response to genotoxic stress. In addition, Western blotting demonstrated less translocation of @entity9135 from cytoplasm to nucleus. Furthermore, real-time polymerase chain reaction (PCR) showed that pretreatment with @entity38308 inhibited the increase of mRNA expressions of @entity650 ( @entity650 ) and @entity876 -induced death domain (PIDD) protein, which have been show to play crucial roles in both senescence and apoptosis (P < 0.05). TUNEL staining revealed an increase in apoptotic HUVECs in the group pretreated with @entity38308 after irradiation. The series of functional assays further showed that radiation-induced senescence-like HUVECs had malfunctions in migration, invasion and formation of capillary-like structures, compared with the sham-irradiated and untreated, irradiated groups. Taken together, these findings indicate that the angiogenic capacity of radiation-induced senescence-like HUVECs decreased, and that irradiation caused vascular endothelial cells to gain a senescence-like phenotype through the DSB/ @entity10190 /NF-kB signal pathway. The data suggests that @entity10190 may be a critical switch that regulates cellular senescence and apoptosis caused by exposure to radiation, and provides new clues for the clinical potential of the combination of radiotherapy and angiogenesis inhibitors.

XXXX Modulates Radiation-Induced Endothelial Senescence of @entity1 Umbilical Veins Through NF-kB Signal Pathway.

@entity1 :: ('9606', 'Species') :: ['human'] @entity9135 :: ('5970', 'Gene') :: ['p65'] @entity650 :: ('3569', 'Gene') :: ['IL-6', 'interleukin-6'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor'] @entity38308 :: ('MESH:C456319', 'Chemical') :: ['PS1145'] @entity10190 :: ('8517', 'Gene') :: ['NEMO'] @entity876 :: ('7157', 'Gene') :: ['p53']
@entity10190 :: (8517,Gene) :: ['NEMO']
