Prominent role of RAB39A-RXRB axis in cancer development and stemness.
Oncotarget
; 9(11): 9852-9866, 2018 Feb 09.
Article
in En
| MEDLINE
| ID: mdl-29515775
ABSTRACT
In this study, we found that RAB39A, a member of the RAS oncogene family, was selectively expressed in cancer cells of different histotypes, by analyzing gene expression in human osteosarcoma cells and the cancer stem cells (CSCs) and by comparing them with normal cells through global transcriptomics and principal component analyses. We further validated RAB39A as a therapeutic target, by silencing its expression. The silencing impaired cancer stemness and spherogenic ability in vitro, as well as tumorigenesis in vivo. RNA-seq analyses in the silenced spheres suggested that RAB39A is associated downstream with RXRB and KLF4. Notably, RXRB expression was inhibited in RAB39A-silenced CSCs. Induced overexpression of RXRB in RAB39A-silenced cells restored spherogenic ability and tumorigenesis, confirming RXRB as a major effector of RAB39A. Quantitative RT-PCR analysis of â¼400 human cancer tissues showed that RAB39A was highly expressed in sarcomas and in malignancies of lymphoid, adrenal and testicular tissues. Our data provide the rationale for targeting of the RAB39A-RXRB axis as a therapy for aggressive cancers.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Oncotarget
Year:
2018
Document type:
Article
Affiliation country:
Japón