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2018 ; 19
(1
): 35
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The RNA binding protein SORBS2 suppresses metastatic colonization of ovarian
cancer by stabilizing tumor-suppressive immunomodulatory transcripts
#MMPMID29548303
Zhao L
; Wang W
; Huang S
; Yang Z
; Xu L
; Yang Q
; Zhou X
; Wang J
; Shen Q
; Wang C
; Le X
; Feng M
; Zhou N
; Lau WB
; Lau B
; Yao S
; Yi T
; Wang X
; Zhao X
; Wei Y
; Zhou S
Genome Biol
2018[Mar]; 19
(1
): 35
PMID29548303
show ga
BACKGROUND: Ovarian cancer constitutes one of the most lethal gynecologic
malignancies for females. Currently, early detection strategies and therapeutic
options for ovarian cancer are far from satisfactory, leading to high diagnosis
rates at late stages and disease relapses. New avenues of therapy are needed that
target key processes in ovarian cancer progression. While a variety of non-coding
RNAs have been proven to regulate ovarian cancer metastatic progression, the
functional roles of RNA-binding proteins (RBPs) in this process are less well
defined. RESULTS: In this study, we identify that the RBP sorbin and SH3 domain
containing 2 (SORBS2) is a potent suppressor of ovarian cancer metastatic
colonization. Mechanistic studies show that SORBS2 binds the 3' untranslated
regions (UTRs) of WFDC1 (WAP four-disulfide core domain 1) and IL-17D
(Interleukin-17D), two secreted molecules that are shown to act as metastasis
suppressors. Enhanced expression of either WFDC1 or IL-17D potently represses
SORBS2 depletion-mediated cancer metastasis promotion. By enhancing the stability
of these gene transcripts, SORBS2 suppresses ovarian cancer invasiveness and
affects monocyte to myeloid-derived suppressor cell and M2-like macrophage
polarization, eliciting a tumor-suppressive immune microenvironment. CONCLUSIONS:
Our data illustrate a novel post-transcriptional network that links cancer
progression and immunomodulation within the tumor microenvironment through
SORBS2-mediated transcript stabilization.