Title:The Role of the LINC01234/miR-433-3p/GRB2 ceRNA Network in
NSCLC Cell Malignant Proliferation
Volume: 26
Issue: 10
Author(s): Wei Wei, Changyong Wang, Jianfeng Zhang, Lele Wang, Lei Wei*Hairong Huang*
Affiliation:
- Department of Cardiothoracic Surgery, Jinling Hospital, No.305 Zhongshan Road, Nanjing 210002, China
- Department of Cardiothoracic Surgery, Jinling Hospital, No.305 Zhongshan Road, Nanjing 210002, China
Keywords:
Non-small cell lung cancer, LINC01234, microRNA-433-3p, GRB2, malignant proliferation, competing endogenous RNA, EDU, colony formation.
Abstract:
Background: Non-small cell lung cancer (NSCLC) is associated with high morbidity
and mortality. Dysregulation of lncRNAs leads to NSCLC progression.
Objective: This study aims to explore the regulatory mechanism of lncRNA LINC01234 in
NSCLC.
Materials and Methods: LINC01234 expression in NSCLC cells was determined. Cell proliferation
was detected using CCK-8, colony formation, and EDU assays after transfection of siRNA
LINC01234 into H1299 cells and transfection of pcDNA3.1-LINC01234 into H1975 cells. Subcellular
localization of LINC01234 was predicted and the binding relations between LINC01234 and
miR-433-3p as well as miR-433-3p and GRB2 were verified. The expression levels of miR-433-3p
and GRB2 in NSCLC cells were determined. Joint experiments of miR-433-3p inhibitor + si-
LINC01234-1 or oe-GRB2 + si-LINC01234-1 were conducted to verify the role of miR-433-3p
and GRB2 in NSCLC cell malignant proliferation.
Results: LINC01234 was abundantly expressed in NSCLC cells. LINC01234 silencing reduced
NSCLC cell proliferation while LINC01234 overexpression enhanced cell proliferation.
LINC01234 competitively bound to miR-433-3p and miR-433-3p directly targeted GRB2. miR-
433-3p knockdown or GRB2 overexpression counteracted the repressive effect of LINC01234 silencing
on NSCLC cell malignant proliferation.
Conclusion: LINC01234 competitively bound to miR-433-3p and promoted GRB2 transcription to
augment NSCLC cell malignant proliferation.