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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Commun
2018 ; 9
(1
): 1845
Nephropedia Template TP
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TGF-? induces miR-100 and miR-125b but blocks let-7a through LIN28B controlling
PDAC progression
#MMPMID29748571
Ottaviani S
; Stebbing J
; Frampton AE
; Zagorac S
; Krell J
; de Giorgio A
; Trabulo SM
; Nguyen VTM
; Magnani L
; Feng H
; Giovannetti E
; Funel N
; Gress TM
; Jiao LR
; Lombardo Y
; Lemoine NR
; Heeschen C
; Castellano L
Nat Commun
2018[May]; 9
(1
): 1845
PMID29748571
show ga
TGF-?/Activin induces epithelial-to-mesenchymal transition and stemness in
pancreatic ductal adenocarcinoma (PDAC). However, the microRNAs (miRNAs)
regulated during this response have remained yet undetermined. Here, we show that
TGF-? transcriptionally induces MIR100HG lncRNA, containing miR-100, miR-125b and
let-7a in its intron, via SMAD2/3. Interestingly, we find that although the
pro-tumourigenic miR-100 and miR-125b accordingly increase, the amount of
anti-tumourigenic let-7a is unchanged, as TGF-? also induces LIN28B inhibiting
its maturation. Notably, we demonstrate that inactivation of miR-125b or miR-100
affects the TGF-?-mediated response indicating that these miRNAs are important
TGF-? effectors. We integrate AGO2-RIP-seq with RNA-seq to identify the global
regulation exerted by these miRNAs in PDAC cells. Transcripts targeted by
miR-125b and miR-100 significantly overlap and mainly inhibit p53 and cell-cell
junctions' pathways. Together, we uncover that TGF-? induces an lncRNA, whose
encoded miRNAs, miR-100, let-7a and miR-125b play opposing roles in controlling
PDAC tumourigenesis.