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- W3090484920 abstract "Ephrin type-A receptor 2 (EPHA2) is a receptor tyrosine kinase (RTK), whose over-expression has been observed in a variety of cancers, including breast cancer. EPHA2 expression may be causally related to tumorigenesis; therefore, it is important to understand how EPHA2 gene (EPHA2) expression is regulated. Here, we report that EPHA2 antisense RNA (EPHA2-AS), a natural antisense transcript, is an important modulator of EPHA2 mRNA levels. EPHA2-AS is a ∼1.8 kb long non-coding RNA (lncRNA) with a poly(A) tail that encodes two splice variants, EPHA2-AS1/2. They are constitutively expressed in a concordant manner with EPHA2 mRNA in human breast adenocarcinoma cell lines and in patient samples, with the highest levels detected in the triple-negative breast cancer (TNBC) subtype. The silencing of EPHA2-AS1/2 by a sense oligonucleotide or over-expression of an antisense oligoribonucleotide, which were both designed from the EPHA2 mRNA region (nt 2955–2974) targeted by AS1/2, showed that EPHA2-AS1/2 modulated EPHA2 mRNA levels by interacting with the specific AS1/2-complementary region in the mRNA. The EPHA2-AS1/2 did not prevent microRNAs from acting on the relevant microRNA response elements shared by EPHA2-AS1/2 and EPHA2 mRNA. Our studies demonstrate a crucial role played by EPHA2-AS1/2 in modulating EPHA2 mRNA levels, and hence production of EPHA2 protein, a key oncogenic RTK that contributes to the tumorigenesis of TNBC cells." @default.
- W3090484920 created "2020-10-08" @default.
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- W3090484920 date "2020-12-01" @default.
- W3090484920 modified "2023-09-27" @default.
- W3090484920 title "EPHA2 antisense RNA modulates EPHA2 mRNA levels in basal-like/triple-negative breast cancer cells" @default.
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- W3090484920 doi "https://doi.org/10.1016/j.biochi.2020.10.002" @default.
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