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• W4313261748 abstract "HOTAIR is a 2.2-kb long noncoding RNA (lncRNA) whose dysregulation has been linked to oncogenesis, defects in pattern formation during early development, and irregularities during the process of epithelial-to-mesenchymal transition (EMT). However, the oncogenic transformation determined by HOTAIR in vivo and its impact on chromatin dynamics are incompletely understood. Here, we generate a transgenic mouse model with doxycycline-inducible expression of human HOTAIR in the context of the MMTV-PyMT breast cancer-prone background to systematically interrogate the cellular mechanisms by which human HOTAIR lncRNA acts to promote breast cancer progression. We show that sustained high levels of HOTAIR over time increased breast metastatic capacity and invasiveness in breast cancer cells, promoting migration and subsequent metastasis to the lung. Subsequent withdrawal of HOTAIR overexpression reverted the metastatic phenotype, indicating oncogenic lncRNA addiction. Furthermore, HOTAIR overexpression altered both the cellular transcriptome and chromatin accessibility landscape of multiple metastasis-associated genes and promoted EMT. These alterations are abrogated within several cell cycles after HOTAIR expression is reverted to basal levels, indicating an erasable lncRNA-associated epigenetic memory. These results suggest that a continual role for HOTAIR in programming a metastatic gene regulatory program. Targeting HOTAIR lncRNA may potentially serve as a therapeutic strategy to ameliorate breast cancer progression." @default.
• W4313261748 created "2023-01-06" @default.
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• W4313261748 date "2022-12-29" @default.
• W4313261748 modified "2023-10-18" @default.
• W4313261748 title "Inducible lncRNA transgenic mice reveal continual role of HOTAIR in promoting breast cancer metastasis" @default.
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• W4313261748 doi "https://doi.org/10.7554/elife.79126" @default.
• W4313261748 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36579891" @default.
• W4313261748 hasPublicationYear "2022" @default.
• W4313261748 type Work @default.
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