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YTHDF2 promotes multiple myeloma cell proliferation via STAT5A/MAP2K2/p-ERK axis
Zhen Hua1,2, Rongfang Wei2, Mengjie Guo1,2
1Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese Medicine, Nanjing, China.
Abstract:
Multiple myeloma (MM) is still incurable partially due to lacking effective therapeutic targets. Aberrant N6-methyladenosine (m6A) RNA modification plays a vital role in many cancers, however few researches are executed in MM. We first screened the m6A-related genes in MM patient cohorts and correlated these genes with patient outcomes. We found that YTHDF2, a well-recognized m6A reader, was increased in MM patients and associated with poor outcomes. Decreased YTHDF2 expression hampered MM cell proliferation in vitro and in vivo, while enforced YTHDF2 expression reversed those effects. The analyses of m6A-RIP-seq and RIP-PCR indicated that STAT5A was the downstream target of YTHDF2, which was binding to the m6A modification site of STAT5A to promote its mRNA degradation. ChIP-seq and PCR assays revealed that STAT5A suppressed MM cell proliferation by occupying the transcription site of MAP2K2 to decrease ERK phosphorylation. In addition, we confirmed that YTHDF2 mediated the unphosphorylated form of STAT5A to inhibit the expression of MAP2K2/p-ERK. In conclusion, our study highlights that YTHDF2/STAT5A/MAP2K2/p-ERK axis plays a key role in MM proliferation and targeting YTHDF2 may be a promising therapeutic strategy.
Insights
This study identifies YTHDF2 as a key driver in multiple myeloma (MM) progression. Targeting YTHDF2 may offer a novel therapeutic strategy for this incurable cancer.
Area of Science:
- Oncology
- Molecular Biology
- Epigenetics
Background:
- Multiple myeloma (MM) remains incurable due to a lack of effective therapeutic targets.
- Aberrant N6-methyladenosine (m6A) RNA modification is implicated in various cancers, but its role in MM is underexplored.
Purpose of the Study:
- To investigate the role of m6A-related genes in multiple myeloma.
- To identify potential therapeutic targets for MM by analyzing m6A gene expression and patient outcomes.
Main Methods:
- Screening of m6A-related genes in MM patient cohorts.
- Analysis of YTHDF2 expression and its correlation with patient outcomes.
- In vitro and in vivo experiments to assess the impact of YTHDF2 on MM cell proliferation.
- m6A-RIP-seq, RIP-PCR, ChIP-seq, and PCR assays to elucidate downstream targets and molecular mechanisms.
Main Results:
- YTHDF2 expression is elevated in MM patients and associated with poor prognosis.
- Reduced YTHDF2 expression inhibits MM cell proliferation, while increased expression promotes it.
- YTHDF2 targets STAT5A mRNA for degradation, and STAT5A suppresses MM proliferation by inhibiting the MAP2K2/ERK pathway.
Conclusions:
- The YTHDF2/STAT5A/MAP2K2/p-ERK axis is crucial for MM cell proliferation.
- Targeting YTHDF2 represents a promising therapeutic strategy for multiple myeloma.
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