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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 Clin+Cancer+Res
2014 ; 20
(17
): 4636-46
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miR-409-3p/-5p promotes tumorigenesis, epithelial-to-mesenchymal transition, and
bone metastasis of human prostate cancer
#MMPMID24963047
Josson S
; Gururajan M
; Hu P
; Shao C
; Chu GY
; Zhau HE
; Liu C
; Lao K
; Lu CL
; Lu YT
; Lichterman J
; Nandana S
; Li Q
; Rogatko A
; Berel D
; Posadas EM
; Fazli L
; Sareen D
; Chung LW
Clin Cancer Res
2014[Sep]; 20
(17
): 4636-46
PMID24963047
show ga
PURPOSE: miR-409-3p/-5p is a miRNA expressed by embryonic stem cells, and its
role in cancer biology and metastasis is unknown. Our pilot studies demonstrated
elevated miR-409-3p/-5p expression in human prostate cancer bone metastatic cell
lines; therefore, we defined the biologic impact of manipulation of
miR-409-3p/-5p on prostate cancer progression and correlated the levels of its
expression with clinical human prostate cancer bone metastatic specimens.
EXPERIMENTAL DESIGN: miRNA profiling of a prostate cancer bone metastatic
epithelial-to-mesenchymal transition (EMT) cell line model was performed. A
Gleason score human tissue array was probed for validation of specific miRNAs. In
addition, genetic manipulation of miR-409-3p/-5p was performed to determine its
role in tumor growth, EMT, and bone metastasis in mouse models. RESULTS: Elevated
expression of miR-409-3p/-5p was observed in bone metastatic prostate cancer cell
lines and human prostate cancer tissues with higher Gleason scores. Elevated
miR-409-3p expression levels correlated with progression-free survival of
patients with prostate cancer. Orthotopic delivery of miR-409-3p/-5p in the
murine prostate gland induced tumors where the tumors expressed EMT and stemness
markers. Intracardiac inoculation (to mimic systemic dissemination) of miR-409-5p
inhibitor-treated bone metastatic ARCaPM prostate cancer cells in mice led to
decreased bone metastasis and increased survival compared with control
vehicle-treated cells. CONCLUSION: miR-409-3p/-5p plays an important role in
prostate cancer biology by facilitating tumor growth, EMT, and bone metastasis.
This finding bears particular translational importance as miR-409-3p/-5p appears
to be an attractive biomarker and/or possibly a therapeutic target to treat bone
metastatic prostate cancer.