RT Journal Article
SR Electronic
T1 RAIN Is a Novel Enhancer-Associated lncRNA That Controls RUNX2 Expression and Promotes Breast and Thyroid Cancer
JF Molecular Cancer Research
JO Mol Cancer Res
FD American Association for Cancer Research
SP 140
OP 152
DO 10.1158/1541-7786.MCR-19-0564
VO 18
IS 1
A1 Rossi, Teresa
A1 Pistoni, Mariaelena
A1 Sancisi, Valentina
A1 Gobbi, Giulia
A1 Torricelli, Federica
A1 Donati, Benedetta
A1 Ribisi, Salvatore
A1 Gugnoni, Mila
A1 Ciarrocchi, Alessia
YR 2020
UL http://mcr.aacrjournals.org/content/18/1/140.abstract
AB Enhancer (ENH)-associated long noncoding RNAs (lncRNA) are a peculiar class of RNAs produced by transcriptionally active ENHs, owning potential gene-regulatory function. Here, we characterized RAIN, a novel ENH-associated lncRNA. Analysis of RAIN expression in a retrospective cohort of human thyroid cancers showed that the expression of this lncRNA is restricted to cancer cells and strongly correlates with the expression of the cancer-promoting transcription factor RUNX2. We showed that RAIN, serving as a cis-regulatory element, promotes RUNX2 expression by two mechanisms. Binding WDR5 and facilitating its localization on the RUNX2 promoter, RAIN modifies the transcriptional status of the RUNX2 locus facilitating transcription initiation. In parallel, RAIN acts as decoy for negative elongation factor complex, restraining its inhibitory function on transcription elongation. In both thyroid and breast cancer cells, RAIN promotes oncogenic features. Using RNA-sequencing profiling, we showed that RAIN orchestrates the expression of a network of cancer-promoting transcription regulators, suggesting that RAIN affects cancer cell phenotype by coordinating the expression of a complex transcriptional network.Implications: Our data contribute to understand lncRNA function in gene regulation and to consolidate their role in cancer.