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2014 ; 33
(18
): 2040-56
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Genome-wide identification of miR-200 targets reveals a regulatory network
controlling cell invasion
#MMPMID25069772
Bracken CP
; Li X
; Wright JA
; Lawrence DM
; Pillman KA
; Salmanidis M
; Anderson MA
; Dredge BK
; Gregory PA
; Tsykin A
; Neilsen C
; Thomson DW
; Bert AG
; Leerberg JM
; Yap AS
; Jensen KB
; Khew-Goodall Y
; Goodall GJ
EMBO J
2014[Sep]; 33
(18
): 2040-56
PMID25069772
show ga
The microRNAs of the miR-200 family maintain the central characteristics of
epithelia and inhibit tumor cell motility and invasiveness. Using the
Ago-HITS-CLIP technology for transcriptome-wide identification of direct microRNA
targets in living cells, along with extensive validation to verify the
reliability of the approach, we have identified hundreds of miR-200a and miR-200b
targets, providing insights into general features of miRNA target site selection.
Gene ontology analysis revealed a predominant effect of miR-200 targets in
widespread coordinate control of actin cytoskeleton dynamics. Functional
characterization of the miR-200 targets indicates that they constitute
subnetworks that underlie the ability of cancer cells to migrate and invade,
including coordinate effects on Rho-ROCK signaling, invadopodia formation, MMP
activity, and focal adhesions. Thus, the miR-200 family maintains the central
characteristics of the epithelial phenotype by acting on numerous targets at
multiple levels, encompassing both cytoskeletal effectors that control actin
filament organization and dynamics, and upstream signals that locally regulate
the cytoskeleton to maintain cell morphology and prevent cell migration.