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2018 ; 18
(1
): 945-957
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English Wikipedia
Matrine inhibits prostate cancer via activation of the unfolded protein
response/endoplasmic reticulum stress signaling and reversal of epithelial to
mesenchymal transition
#MMPMID29845238
Chang J
; Hu S
; Wang W
; Li Y
; Zhi W
; Lu S
; Shi Q
; Wang Y
; Yang Y
Mol Med Rep
2018[Jul]; 18
(1
): 945-957
PMID29845238
show ga
Prostate cancer is the second most commonly diagnosed malignancy and the sixth
global primary cause of malignancy?associated fatality. Increased invasiveness
and motility in prostate cancer cells are associated with ubiquitin proteasome
system?regulated epithelial to mesenchymal transition (EMT). Impairment of the
endoplasmic reticulum (ER) causes ER stress due to the accumulation of unfolded
proteins and altered cell survival. In the current study, the effect and
mechanism of matrine on cell apoptosis, viability, migration and invasion of
human prostate cancer cells in vivo and in vitro through the unfolded protein
response (UPR)/ER stress pathway were investigated. Matrine inhibited proteasomal
chymotrypsin?like (CT?like) activity in the prostate carcinoma cellular
proteasome. Upregulated vimentin and N?cadherin and downregulated E?cadherin were
also observed in vitro and in vivo. In vitro analyses showed that matrine
repressed cell motility, viability and invasion, arrested the cell cycle at the
G0/G1 phase and induced prostate cancer cell apoptosis. Furthermore, matrine
activated the UPR/ER stress signaling cascade in prostate cancer cells and tumor
tissues of xenograft?bearing nude mice. Results also demonstrated that the
anti?apoptotic protein Bcl?2 was downregulated, the pro?apoptotic protein Bak was
upregulated and the cell growth and cell cycle?related proteins c?Myc, Cyclin B1,
Cyclin D1 and CDK1 were downregulated. Moreover, matrine inhibited tumor growth
and Ki?67 expression in xenograft?bearing nude mice. To the best of our
knowledge, the present study indicated for the first time that matrine exerted
marked anticancer functions in human prostate carcinoma in vivo and in vitro
through activation of the proteasomal CT?like activity inhibition mediated by the
UPR/ER stress signaling pathway.