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Genome-wide mapping of HIF-2α binding under normoxia in human bronchial epithelial cells (BEAS-2B)


ABSTRACT: Growing number of cancer (stem) cells and stem cells were described to accommodate constituent active HIF-2α under normoxia. Previous study of hypoxia effect may have obscured some of normoxic HIF-2α functions as hypoxia inducible features. Our interest in study of protective potential of HIFs in lung cells led us to discover pseudohypoxia functions of HIF-2α under normoxia in human bronchial epithelial cells which exhibit pluripotency related markers and features. Our study provided perspective to pseudohypoxia functions of HIF-2α via enrichment of de novo motifs. In addition to the C-TAD, the N-TAD of HIF-2α was found to contribute to targeting on these non-canonical loci. Further elucidation of pseudohypoxia mechanism could resolve its implication of malignancy or pluripotency. We report globally mapped binding of HIF-2α under normoxia by using high throughput sequencing

ORGANISM(S): Homo sapiens

SUBMITTER: Meng-Chang Lee 

PROVIDER: E-GEOD-81635 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Genome-wide analysis of HIF-2α chromatin binding sites under normoxia in human bronchial epithelial cells (BEAS-2B) suggests its diverse functions.

Lee Meng-Chang MC   Huang Hsin-Ju HJ   Chang Tzu-Hao TH   Huang Hsieh-Chou HC   Hsieh Shen-Yuan SY   Chen Yi-Siou YS   Chou Wei-Yuan WY   Chiang Chiao-Hsi CH   Lai Ching-Huang CH   Shiau Chia-Yang CY  

Scientific reports 20160704


Constitutive functional HIF-2α was recently identified in cancer and stem cell lines under normoxia. In this study, BEAS-2B, a bronchial epithelial cell line, was shown to constitutively express active HIF-2α under normoxia and exhibit markers of pluripotency including Oct-4, Nanog, and sphere formation. Oct-4 expression was reduced after knockdown of HIF-2α under normoxia. Global enrichment analysis of HIF-2α demonstrated the diverse functions of HIF-2α under normoxia. Bioinformatics analysis o  ...[more]

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