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Updated: Jan 27, 2026

A Method for Measuring RNA N6-methyladenosine Modifications in Cells and Tissues
Published on: December 5, 2016
RNA N6-methyladenosine demethylase FTO promotes breast tumor progression through inhibiting BNIP3
Yi Niu1, Ziyou Lin1, Arabella Wan2
1School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China.
Background:
N6-methyladenosine (m6A) modification is the most pervasive modification in mRNA, and has been considered as a new layer of epigenetic regulation on mRNA processing, stability and translation. Despite its functional significance in various physiological processes, the role of the m6A modification involved in breast cancer is yet fully understood.
Methods:
We used the m6A-RNA immunoprecipitation sequencing to identify the potential targets in breast cancer. To determine the underlying mechanism for the axis of FTO-BNIP3, we performed a series of in vitro and in vivo assays in 3 breast cancer cell lines and 36 primary breast tumor tissues and 12 adjunct tissues.
Results:
We showed that FTO, a key m6A demethylase, was up-regulated in human breast cancer. High level of FTO was significantly associated with lower survival rates in patients with breast cancer. FTO promoted breast cancer cell proliferation, colony formation and metastasis in vitro and in vivo. We identified BNIP3, a pro-apoptosis gene, as a downstream target of FTO-mediated m6A modification. Epigenetically, FTO mediated m6A demethylation in the 3'UTR of BNIP3 mRNA and induced its degradation via an YTHDF2 independent mechanism. BNIP3 acts as a tumor suppressor and is negatively correlated with FTO expression in clinical breast cancer patients. BNIP3 dramatically alleviated FTO-dependent tumor growth retardation and metastasis.
Conclusions:
Our findings demonstrate the functional significance of the m6A modification in breast cancer, and suggest that FTO may serve as a novel potential therapeutic target for breast cancer.
Insights
The study reveals that the FTO enzyme, a key regulator of N6-methyladenosine (m6A) modification, is elevated in breast cancer and promotes tumor growth. Targeting FTO may offer a new therapeutic strategy for breast cancer patients.
Area of Science:
- Epigenetics
- Molecular Biology
- Oncology
Background:
- N6-methyladenosine (m6A) is a prevalent mRNA modification regulating gene expression.
- The role of m6A modification in breast cancer pathogenesis remains incompletely understood.
Purpose of the Study:
- To investigate the role of m6A modification, specifically the FTO-BNIP3 axis, in breast cancer.
- To identify potential therapeutic targets for breast cancer based on m6A regulation.
Main Methods:
- m6A-RNA immunoprecipitation sequencing was employed to identify m6A targets in breast cancer.
- In vitro and in vivo assays were conducted in breast cancer cell lines and patient tissues to elucidate the FTO-BNIP3 mechanism.
Main Results:
- FTO, an m6A demethylase, is upregulated in breast cancer and associated with poor patient survival.
- FTO promotes breast cancer cell proliferation, colony formation, and metastasis.
- FTO targets BNIP3, a tumor suppressor gene, leading to its degradation and promoting tumor growth.
Conclusions:
- FTO plays a significant role in breast cancer progression through m6A modification of BNIP3.
- FTO represents a potential novel therapeutic target for breast cancer treatment.
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