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2016 ; 7
(52
): 86087-86102
Nephropedia Template TP
gab.com Text
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English Wikipedia
A novel highly potent trivalent TGF-? receptor trap inhibits early-stage
tumorigenesis and tumor cell invasion in murine Pten-deficient prostate glands
#MMPMID27863384
Qin T
; Barron L
; Xia L
; Huang H
; Villarreal MM
; Zwaagstra J
; Collins C
; Yang J
; Zwieb C
; Kodali R
; Hinck CS
; Kim SK
; Reddick RL
; Shu C
; O'Connor-McCourt MD
; Hinck AP
; Sun LZ
Oncotarget
2016[Dec]; 7
(52
): 86087-86102
PMID27863384
show ga
The effects of transforming growth factor beta (TGF-?) signaling on prostate
tumorigenesis has been shown to be strongly dependent on the stage of
development, with TGF-? functioning as a tumor suppressor in early stages of
disease and as a promoter in later stages. To study in further detail the
paradoxical tumor-suppressive and tumor-promoting roles of the TGF-? pathway, we
investigated the effect of systemic treatment with a TGF-? inhibitor on early
stages of prostate tumorigenesis. To ensure effective inhibition, we developed
and employed a novel trivalent TGF-? receptor trap, RER, comprised of domains
derived from the TGF-? type II and type III receptors. This trap was shown to
completely block T?RII binding, to antagonize TGF-?1 and TGF-?3 signaling in
cultured epithelial cells at low picomolar concentrations, and it showed equal or
better anti-TGF-? activities than a pan TGF-? neutralizing antibody and a TGF-?
receptor I kinase inhibitor in various prostate cancer cell lines. Systemic
administration of RER inhibited prostate tumor cell proliferation as indicated by
reduced Ki67 positive cells and invasion potential of tumor cells in high grade
prostatic intraepithelial neoplasia (PIN) lesions in the prostate glands of Pten
conditional null mice. These results provide evidence that TGF-? acts as a
promoter rather than a suppressor in the relatively early stages of this
spontaneous prostate tumorigenesis model. Thus, inhibition of TGF-? signaling in
early stages of prostate cancer may be a novel therapeutic strategy to inhibit
the progression as well as the metastatic potential in patients with prostate
cancer.
|Animals
[MESH]
|Carcinogenesis
[MESH]
|Cell Line, Tumor
[MESH]
|Cell Proliferation
[MESH]
|Humans
[MESH]
|Male
[MESH]
|Mice
[MESH]
|Neoplasm Invasiveness
[MESH]
|Neoplasm Staging
[MESH]
|PTEN Phosphohydrolase/*physiology
[MESH]
|Phosphorylation
[MESH]
|Prostate/*pathology
[MESH]
|Prostatic Neoplasms/pathology/*prevention & control
[MESH]