Published in:
Open Access
01-12-2017 | Research article
MicroRNA-200c and microRNA- 141 are regulated by a FOXP3-KAT2B axis and associated with tumor metastasis in breast cancer
Authors:
Guangxin Zhang, Wei Zhang, Bingjin Li, Erica Stringer-Reasor, Chengjing Chu, Liyan Sun, Sejong Bae, Dongquan Chen, Shi Wei, Kenneth Jiao, Wei-Hsiung Yang, Ranji Cui, Runhua Liu, Lizhong Wang
Published in:
Breast Cancer Research
|
Issue 1/2017
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Abstract
Background
Members of the microRNA (miR)-200 family, which are involved in tumor metastasis, have potential as cancer biomarkers, but their regulatory mechanisms remain elusive.
Methods
We investigated FOXP3-inducible breast cancer cells, Foxp3 heterozygous Scurfy mutant (Foxp3
sf/+
) female mice, and patients with breast cancer for characterization of the formation and regulation of the miR-200 family in breast cancer cells and circulation. Participants (259), including patients with breast cancer or benign breast tumors, members of breast cancer families, and healthy controls, were assessed for tumor and circulating levels of the miR-200 family.
Results
First, we identified a FOXP3-KAT2B-miR-200c/141 axis in breast cancer cells. Second, aging Foxp3
sf/+
female mice developed spontaneous breast cancers and lung metastases. Levels of miR-200c and miR-141 were lower in Foxp3
sf/+
tumor cells than in normal breast epithelial cells, but plasma levels of miR-200c and miR-141 in the Foxp3
sf/+
mice increased during tumor progression and metastasis. Third, in patients with breast cancer, the levels of miR-200c and 141 were lower in FOXP3
low relative to those with FOXP3
high breast cancer cells, especially in late-stage and metastatic cancer cells. The levels of miR-200c and miR-141 were higher in plasma from patients with metastatic breast cancer than in plasma from those with localized breast cancer, with benign breast tumors, with a family history of breast cancer, or from healthy controls. Finally, in Foxp3
sf/+
mice, plasma miR-200c and miR-141 appeared to be released from tumor cells.
Conclusions
miR-200c and miR-141 are regulated by a FOXP3-KAT2B axis in breast cancer cells, and circulating levels of miR-200c and miR-141 are potential biomarkers for early detection of breast cancer metastases.