The long non-coding RNA MACC1-AS1 promotes nasopharyngeal carcinoma cell stemness via suppressing miR-145-mediated inhibition on SMAD2/MACC1-AS1 axis - 14/03/20
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Graphical abstract |
LncRNA MACC1-AS1 antagonized the activity of miR-145 via acting as a ceRNA, and miR-145 could target Smad2. In turn, smad2 directly bound to MACC1-AS1 promoter and thus increased MACC1-AS1 expression, forming a novel MACC1-AS1/miR-145/Smad2 negative loop responsible for NPC cell stemness.
Highlights |
• | A new critical role of lncRNA MACC1-AS1 in NPC cell stemness is proposed; |
• | The mechanisms of MACC1-AS1 in NPC cell stemness are further studied; |
• | The novel mechanism provides new potential targets for NPC. |
Abstract |
The promoting roles of the long non-coding RNA (lncRNA) MACC1-AS1 have been indicated in gastric and pancreatic cancer, however, its roles in nasopharyngeal carcinoma (NPC) progression are never been revealed. In this work, it was shown that lncRNA MACC1-AS1 was highly expressed in NPC tissues and cells relative to the adjacent tissues and nasal mucosa cells, respectively. Additionally, MACC1-AS1 expression was positively correlated with the high rate of lymph node metastasis and large tumor size. in vitro and in vivo experiments revealed that MACC1-AS1 knockdown reduced the stemness of NPC cells, which was indicated by the decrease of sphere-forming ability, ALDH1 activity, stemness marker expression and tumor-initiating capacity. Mechanistic research showed that MACC1-AS1 antagonized the activity of miR-145, which could target Smad2. In turn, smad2 directly bound to MACC1-AS1 promoter and thus increased MACC1-AS1 expression. Notably, knockdown of miR-145 or overexpression of Smad2 rescued the inhibition of MACC1-AS1 knockdown on the stemness of NPC cells. Therefore, these results demonstrate a novel MACC1-AS1/miR-145/Smad2 negative loop responsible for NPC cell stemness.
El texto completo de este artículo está disponible en PDF.Keywords : Long non-coding RNA, MACC1-AS1, miR-145, Smad2, Stemness, Nasopharyngeal carcinoma
Esquema
Vol 125
Artículo 109986- mai 2020 Regresar al númeroBienvenido a EM-consulte, la referencia de los profesionales de la salud.
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