human
The task is to decide the Hallmarks of Cancer (HOC) taxonomy of the article based on its abstract. The input is an abstract text. There are 10 topics you will need to decide whether the article is related to. Topics: sustaining proliferative signaling, evading growth suppressors, resisting cell death, enabling replicative immortality, inducing angiogenesis, activating invasion and metastasis, genomic instability and mutation, tumor promoting inflammation, cellular energetics, avoiding immune destruction. The output should be topics from the above 10 topics, that are related to the input article. Please note one article can be related to multiple topics. Output format: provide a semicolon-separated list of relevant topics.
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    INPUT: BACKGROUND Cellular and clinical sensitivity to ionizing radiation ( IR ) is determined by DNA double-strand breaks ( DSB ) repair . Here , we investigate the molecular mechanism underlying the extreme response of a head and neck tumor case ( SKX ) to standard radiotherapy . METHODS Immunofluorescence ( IF ) was used for the assessment of DSB repair , Western blot and real-time PCR for protein and mRNA expression , respectively . RESULTS SKX cells exhibited a pronounced radiosensitivity associated with numerous residual γ-H2AX foci after IR . This was not associated with lacking canonical repair proteins . SKX cells did not express any ATM protein . Accordingly , immunoblotting revealed no ATM kinase activity toward substrates such as p-SMC1 , p-CHK2 and p-KAP1 . Sequencing of all 66 exons of ATM showed no mutation . ATM mRNA level was moderately reduced , which could be reverted by 5'-Aza-C treatment but without restoring protein levels . Importantly , we demonstrated a post-transcriptional regulation in SKX cells via 6-fold enhanced levels of miR-421 , which targets the 3'-UTR of ATM mRNA . Transfection of SKX cells with either anti-miR-421 inhibitor or a microRNA-insensitive ATM vector recovered ATM expression and abrogated the hyper-radiosensitivity . CONCLUSION This is the first report describing microRNA-mediated down-regulation of ATM leading to clinically manifest tumor radiosensitivity .
    OUTPUT:

agent
genomic instability and mutation
The task is to decide the Hallmarks of Cancer (HOC) taxonomy of the article based on its abstract. The input is an abstract text. There are 10 topics you will need to decide whether the article is related to. Topics: sustaining proliferative signaling, evading growth suppressors, resisting cell death, enabling replicative immortality, inducing angiogenesis, activating invasion and metastasis, genomic instability and mutation, tumor promoting inflammation, cellular energetics, avoiding immune destruction. The output should be topics from the above 10 topics, that are related to the input article. Please note one article can be related to multiple topics. Output format: provide a semicolon-separated list of relevant topics.
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    INPUT: BACKGROUND Cellular and clinical sensitivity to ionizing radiation ( IR ) is determined by DNA double-strand breaks ( DSB ) repair . Here , we investigate the molecular mechanism underlying the extreme response of a head and neck tumor case ( SKX ) to standard radiotherapy . METHODS Immunofluorescence ( IF ) was used for the assessment of DSB repair , Western blot and real-time PCR for protein and mRNA expression , respectively . RESULTS SKX cells exhibited a pronounced radiosensitivity associated with numerous residual γ-H2AX foci after IR . This was not associated with lacking canonical repair proteins . SKX cells did not express any ATM protein . Accordingly , immunoblotting revealed no ATM kinase activity toward substrates such as p-SMC1 , p-CHK2 and p-KAP1 . Sequencing of all 66 exons of ATM showed no mutation . ATM mRNA level was moderately reduced , which could be reverted by 5'-Aza-C treatment but without restoring protein levels . Importantly , we demonstrated a post-transcriptional regulation in SKX cells via 6-fold enhanced levels of miR-421 , which targets the 3'-UTR of ATM mRNA . Transfection of SKX cells with either anti-miR-421 inhibitor or a microRNA-insensitive ATM vector recovered ATM expression and abrogated the hyper-radiosensitivity . CONCLUSION This is the first report describing microRNA-mediated down-regulation of ATM leading to clinically manifest tumor radiosensitivity .
    OUTPUT:
