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2018 ; 9
(33
): 23102-23113
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A targeted transforming growth factor-beta (TGF-?) blocker, TTB, inhibits tumor
growth and metastasis
#MMPMID29796175
Zhou C
; Li J
; Lin L
; Shu R
; Dong B
; Cao D
; Li Q
; Wang Z
Oncotarget
2018[May]; 9
(33
): 23102-23113
PMID29796175
show ga
Transforming growth factor beta (TGF-?) promotes cancer growth in late stage
cancers. To inhibit the TGF-? pathway, we investigated a tumor-targeting TGF-?
receptor blocker, TTB, and its role in tumor progress. The targeted TTB comprised
of the extracellular domain of the TGF-? receptor II, the endoglin domain of
TGF-? receptor III, and the human immuno-globin IgG1 constant fragment (Fc). To
enhance tumor microenvironment targeting, a RGD peptide was fused at the
N-terminal of TTB. The targeted TTB exhibited potent TGF-? neutralization
activities, and inhibited cancer cell migration and invasion as well as colony
formation. In xenograft models, the TTB had potent tumor inhibition activities.
The TTB also attenuated the TGF-?1-induced Smad2 phosphorylation and epithelial
to mesenchymal transformation (EMT), and suppressed breast cancer metastasis.
Thus, the TTB is an effective TGF-? blocker with a potential for blocking
excessive TGF-? induced pathogenesis in vivo.