Abstract

Accumulating evidence has indicated crucial roles for pseudogenes in human cancers. However, the roles played by pseudogenes in the pathogenesis of HCC, particularly HCC early recurrence, still incompletely elucidated. Herein, we identify a novel early recurrence related pseudogene RACGAP1P which was significantly upregulated in HCC and was associated with larger tumour size, advanced clinical stage, abnormal AFP level and shorter survival time. In vitro and in vivo experiments have shown that RACGAP1P is a prerequisite for the development of malignant characteristics of HCC cells, including cell growth and migration. Mechanistic investigations indicated that RACGAP1P elicits its oncogenic activity as a ceRNA to sequestrate miR-15-5p from its endogenous target RACGAP1, thereby leading to the upregulation of RACGAP1 and the activation of RhoA/ERK signalling. These results may provide new insights into the functional crosstalk of the pseudogene/miRNA/parent-gene genetic network during HCC early relapse and may contribute to improving the clinical intervention for this subset of HCC patients.

Details

Title
Pseudogene RACGAP1P activates RACGAP1/Rho/ERK signalling axis as a competing endogenous RNA to promote hepatocellular carcinoma early recurrence
Author
Meng-Yao, Wang 1 ; Dong-Ping, Chen 1 ; Qi Bin 1 ; Ming-Yi, Li 1 ; Yan-Yi, Zhu 1 ; Wen-Jing, Yin 1 ; He, Lu 1 ; Yu, Yi 1 ; Zhou-Yu, Li 1 ; Lin, Ling 1 ; Yang, Fang 1 ; Zhi-Rui, Lin 2 ; Jin-Quan, Liu 1 

 Affiliated Cancer Hospital and Institute of Guangzhou Medical University, Department of Radiation Oncology, Guangzhou, China (GRID:grid.410737.6) (ISNI:0000 0000 8653 1072) 
 Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China (GRID:grid.488530.2) (ISNI:0000 0004 1803 6191) 
Publication year
2019
Publication date
Jun 2019
Publisher
Springer Nature B.V.
e-ISSN
20414889
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2234458892
Copyright
© The Author(s) 2019. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.