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: PURPOSE This study aims to investigate the role of the aberrant expression of Transkelolase-like 1 ( TKTL1 ) in head and neck squamous cell carcinoma ( HNSCC ) tumorigenesis and to characterize TKTL1 contribution to HNSCC tumorigenesis through aerobic glycolysis and HIF1alpha stabilization . EXPERIMENTAL DESIGN TKTL1 promoter hypomethylation and mRNA/protein aberrant expression were studied in human HNSCC tumor samples and normal mucosas . Oncogenic functions of TKTL1 were examined in HNSCC cell line panels and tumor xenograft models with TKTL1 expression construct . The metabolite levels of fructose-6-phosphate , glyceraldehydes-3-phosphate , pyruvate , lactate , and the levels of HIF1alpha protein and its downsteam glycolytic targets were compared between the TKTL1-expressing and vehicle-expressing HNSCC cells . Meanwhile , the effects of HIF1alpha/glycolytic inhibitors were evaluated on the TKTL1 transfectants . RESULTS TKTL1 exhibits high frequency of promoter hypomethylation in HNSCC tumors compared with the normal mucosas , correlating with its overexpression in HNSCC . Overexpression of TKTL1 in HNSCC cells promoted cellular proliferation and enhanced tumor growth in vitro and in vivo . Overexpression of TKTL1 increased the production of fructose-6-phosphate and glyceraldehyde-3-phosphate , in turn elevating the production of pyruvate and lactate , resulting in the normoxic stabilization of the malignancy-promoting transcription factor HIF1alpha and the upregulation of downstream glycolytic enzymes . Notably , the reduction of TKTL1 expression decreased HIF1alpha accumulation and inhibition with HIF1alpha and/or the glycolysis inhibitor could abrogate the growth effects mediated by TKTL1 overexpression . CONCLUSION TKTL1 is a novel candidate oncogene that is epigenetically activated by aberrant hypomethlation and contributes to a malignant phenotype through altered glycolytic metabolism and HIF1alpha accumulation .
    OUTPUT:

agent
cellular energetics
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: PURPOSE This study aims to investigate the role of the aberrant expression of Transkelolase-like 1 ( TKTL1 ) in head and neck squamous cell carcinoma ( HNSCC ) tumorigenesis and to characterize TKTL1 contribution to HNSCC tumorigenesis through aerobic glycolysis and HIF1alpha stabilization . EXPERIMENTAL DESIGN TKTL1 promoter hypomethylation and mRNA/protein aberrant expression were studied in human HNSCC tumor samples and normal mucosas . Oncogenic functions of TKTL1 were examined in HNSCC cell line panels and tumor xenograft models with TKTL1 expression construct . The metabolite levels of fructose-6-phosphate , glyceraldehydes-3-phosphate , pyruvate , lactate , and the levels of HIF1alpha protein and its downsteam glycolytic targets were compared between the TKTL1-expressing and vehicle-expressing HNSCC cells . Meanwhile , the effects of HIF1alpha/glycolytic inhibitors were evaluated on the TKTL1 transfectants . RESULTS TKTL1 exhibits high frequency of promoter hypomethylation in HNSCC tumors compared with the normal mucosas , correlating with its overexpression in HNSCC . Overexpression of TKTL1 in HNSCC cells promoted cellular proliferation and enhanced tumor growth in vitro and in vivo . Overexpression of TKTL1 increased the production of fructose-6-phosphate and glyceraldehyde-3-phosphate , in turn elevating the production of pyruvate and lactate , resulting in the normoxic stabilization of the malignancy-promoting transcription factor HIF1alpha and the upregulation of downstream glycolytic enzymes . Notably , the reduction of TKTL1 expression decreased HIF1alpha accumulation and inhibition with HIF1alpha and/or the glycolysis inhibitor could abrogate the growth effects mediated by TKTL1 overexpression . CONCLUSION TKTL1 is a novel candidate oncogene that is epigenetically activated by aberrant hypomethlation and contributes to a malignant phenotype through altered glycolytic metabolism and HIF1alpha accumulation .
    OUTPUT:
