4.8 Article

Long noncoding RNA (lncRNA) EIF3J-DT induces chemoresistance of gastric cancer via autophagy activation

Journal

AUTOPHAGY
Volume 17, Issue 12, Pages 4083-4101

Publisher

TAYLOR & FRANCIS INC
DOI: 10.1080/15548627.2021.1901204

Keywords

ATG14; autophagy; chemotherapy resistance; EIF3J-DT; gastric cancer

Categories

Funding

  1. Guangzhou Municipal Science and Technology Project [201803010070]
  2. National Natural Science Foundation of China [81772580]

Ask authors/readers for more resources

Recent studies have shown that lncRNA EIF3J-DT is highly expressed in drug-resistant gastric cancer cells, contributing to chemoresistance by activating autophagy through targeting ATG14. This regulatory mechanism by EIF3J-DT may serve as a potential new target for enhancing chemosensitivity and improving prognosis in gastric cancer patients.
Chemotherapy is currently the main treatment for unresectable or advanced postoperative gastric cancers. However, its efficacy is negatively affected by the occurrence of chemoresistance, which severely affects patient prognosis. Recently, dysregulation in autophagy has been suggested as a potential mechanism for chemoresistence, and long noncoding RNA (lncRNA) also shows its regulatory role in cancer drug resistance. Using RNA sequencing, we found that lncRNA EIF3J-DT was highly expressed in drug-resistant gastric cancer cells. In-vitro and in-vivo experiments showed that EIF3J-DT activated autophagy and induced drug resistance in gastric cancer cells by targeting ATG14. Bioinformatics and experimental results showed that EIF3J-DT regulated the expression of ATG14 through direct binding to enhance stabilization of ATG14 mRNA and via blocking the degradation of ATG14 mRNA through competitively binding with microRNA (miRNA) MIR188-3p. Therefore, EIF3J-DT increased the expression of ATG14, contributing to activation of autophagy and chemoresistance. Furthermore, it was confirmed that EIF3J-DT and ATG14 were highly expressed in gastric cancer patients resistant to chemotherapy, and this was closely associated with patient prognosis. In conclusion, EIF3J-DT is involved in the regulation of autophagy and chemoresistance in gastric cancer cells by targeting ATG14. It may be a suitable new target for enhancing chemosensitivity and improving prognosis.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.8
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available