Journal
ONCOTARGET
Volume 8, Issue 17, Pages 29091-29100Publisher
IMPACT JOURNALS LLC
DOI: 10.18632/oncotarget.16196
Keywords
natural antisense transcript (NAT); long noncoding RNA (lncRNA); esophageal squamous cell carcinoma (ESCC); quantitative real-time PCR (qRT-PCR); SDS-polyacrylamide gel electrophoresis (SDS-PAGE)
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Natural antisense transcripts (NATs) as one of the most diverse classes of long noncoding RNAs (lncRNAs), have been demonstrated involved in fundamental biological processes in human. Here, we reported that human prohibitin gene pseudogene 1 (PHBP1) was upregulated in ESCC, and increased PHBP1 expression in ESCC was associated with clinical advanced stage. Functional experiments showed that PHBP1 knockdown inhibited ESCC cells proliferation, colony formation and xenograft tumor growth in vitro and in vivo by causing cell-cycle arrest at the G1-G0 phase. Mechanisms analysis revealed that PHBP1 transcript as an antisense transcript of PHB is partially complementary to PHB mRNA and formed an RNA-RNA hybrid with PHB, consequently inducing an increase of PHB expression at both the mRNA and protein levels. Furthermore, PHBP1 expression is strongly correlated with PHB expression in ESCC tissues. Collectively, this study elucidates an important role of PHBP1 in promoting ESCC partly via increasing PHB expression.
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