期刊
CELL DEATH DISCOVERY
卷 7, 期 1, 页码 -出版社
SPRINGERNATURE
DOI: 10.1038/s41420-021-00506-z
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资金
- Shanghai Qingpu District Health Commission [W2019-42]
- Hospital Key Project [QYZ2019-05]
- Shanghai Science and Technology Committee [19140901000]
- National Natural Science Foundation of China [81502571]
The study found that circHIF1A from hypoxic cancer-associated fibroblasts (CAFs) exosomes played an important role in stem cell properties of breast cancer and may act as a target molecule for breast cancer therapy.
Hypoxia is a common phenomenon in solid tumors. The roles of exosomes from hypoxic breast cancer stroma are less studied. So, the study was aimed to investigate the role of exosomes from hypoxic cancer-associated fibroblasts (CAFs) cells in breast cancer. The circRNA array analysis was performed to screen differential expressed circRNAs between hypoxic and normoxic CAFs exosomes. Candidate circHIF1A (circ_0032138) was screened out and it was confirmed that circHIF1A was up-regulated in the exosomes from hypoxic CAFs and their exosomes. Through investigating cellular functions including cell proliferation and stem cell features, it was demonstrated that hypoxic CAFs exosomes transferred circHIF1A into breast cancer cells, which played an important role in cancer stem cell properties sponging miR-580-5p by regulating CD44 expression. In a summary, circHIF1A from hypoxic CAFs exosomes played an important role in stem cell properties of breast cancer. CircHIF1A may act as a target molecule of breast cancer therapy.
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