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2017 ; 8
(16
): 26460-26470
Nephropedia Template TP
gab.com Text
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English Wikipedia
Trichosanthin increases Granzyme B penetration into tumor cells by upregulation
of CI-MPR on the cell surface
#MMPMID28460437
Li C
; Zeng M
; Chi H
; Shen J
; Ng TB
; Jin G
; Lu D
; Fan X
; Xiong B
; Xiao Z
; Sha O
Oncotarget
2017[Apr]; 8
(16
): 26460-26470
PMID28460437
show ga
Trichosanthin is a plant toxin belonging to the family of ribosome-inactivating
proteins. It has various biological and pharmacological activities, including
anti-tumor and immunoregulatory effects. In this study, we explored the potential
medicinal applications of trichosanthin in cancer immunotherapy. We found that
trichosanthin and cation-independent mannose-6-phosphate receptor competitively
bind to the Golgi-localized, ?-ear containing and Arf-binding proteins. It in
turn promotes the translocation of cation-independent mannose-6-phosphate
receptor from the cytosol to the plasma membrane, which is a receptor of Granzyme
B. The upregulation of this receptor on the tumor cell surface increased the cell
permeability to Granzyme B, and the latter is one of the major factors of
cytotoxic T lymphocyte-mediated tumor cell apoptosis. These results suggest a
novel potential application of trichosanthin and shed light on its anti-tumor
immunotherapy.