Unknown,Transcriptomics,Genomics,Proteomics

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Gene expression analysis of RB1 knockdown in bone in response to radiation


ABSTRACT: The role of RB1 in response to radiation was examined in human osteoblasts. We demonstrate that RB1 induced SASP genes, a response which was attenuated in RB1 knockdown osteoblasts. Subconfluent hOB shEV and shRB1 cells were irradiated at 4 Gy using a 137Cesium source at a dose rate of 1.7 min/Gy and cell pelllets collected 0, 2, 4, 8, 16 and 24 hrs after irradiation.

ORGANISM(S): Homo sapiens

SUBMITTER: Maya Kansara 

PROVIDER: E-GEOD-50532 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications


Ionizing radiation (IR) and germline mutations in the retinoblastoma tumor suppressor gene (RB1) are the strongest risk factors for developing osteosarcoma. Recapitulating the human predisposition, we found that Rb1+/- mice exhibited accelerated development of IR-induced osteosarcoma, with a latency of 39 weeks. Initial exposure of osteoblasts to carcinogenic doses of IR in vitro and in vivo induced RB1-dependent senescence and the expression of a panel of proteins known as senescence-associated  ...[more]

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