Abstract:
:Nasal-type natural killer/T-cell lymphoma (NKTCL) is an aggressive malignancy with poor survival outcomes that is relatively resistant to chemotherapy. N6-Methyladenosine (m6A) modification, the most prevalent modification of eukaryotic messenger RNA, is involved in the progression of various tumors. However, it is unclear whether it has a physiological role in NKTCL development. To address this question, we probed its function and molecular mechanisms in NKTCL. Initially, we demonstrated that Wilms' tumor 1-associated protein (WTAP), a major RNA N6-adenosine methyltransferase, was obviously upregulated in human NKTCL cell lines (YTS and SNK-6 cells), compared with normal NK cells. Functionally, depletion of WTAP noticeably repressed proliferation and facilitated apoptosis in YTS and SNK-6 cells. Moreover, intervention of WTAP evidently prohibited NKTCL cell chemotherapy resistance to cisplatin, as reflected by a lower inhibition of cell viability and decreased expression of drug resistance-associated protein expression MRP-1 and P-gp in YTS and SNK-6 cells. With regard to the mechanism, we revealed that WTAP enhanced dual-specificity phosphatases 6 (DUSP6) expression by increasing m6A levels of DUSP6 mRNA transcript, leading to oncogenic functions in NKTCL. Interestingly, WTAP contributed to the progression and chemotherapy sensitivity of NKTCL by stabilizing DUSP6 mRNA in an m6A-dependent manner. Taken together, these findings uncovered a critical function for WTAP-guided m6A methylation and identified DUSP6 as an important target of m6A modification in the regulation of chemotherapy resistance in NKTCL oncogenesis. This study highlights WTAP as a potential therapeutic target of NKTCL treatment.
journal_name
IUBMB Lifejournal_title
IUBMB lifeauthors
Ma H,Shen L,Yang H,Gong H,Du X,Li Jdoi
10.1002/iub.2410subject
Has Abstractpub_date
2020-11-17 00:00:00eissn
1521-6543issn
1521-6551pub_type
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