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2016 ; 14
(5
): 4559-4566
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Quercetin-induced apoptosis of HT-29 colon cancer cells via inhibition of the
Akt-CSN6-Myc signaling axis
#MMPMID27748879
Yang L
; Liu Y
; Wang M
; Qian Y
; Dong X
; Gu H
; Wang H
; Guo S
; Hisamitsu T
Mol Med Rep
2016[Nov]; 14
(5
): 4559-4566
PMID27748879
show ga
Constitutive photomorphogenesis 9 signalosome (CSN) consists of a total of eight
subunits (CSN1-CSN8) in mammalian cells. CSN6 may promote carcinogenesis by
positively regulating v?myc avian myelocytomatosis viral oncogene homolog (Myc)
and MDM2 proto?oncogene stability, and is regarded as a potential target for
cancer therapy. Quercetin has a substantial anticancer effect on various human
cancer cells. The present study investigated the effects of quercetin on
HT-29 human colorectal cancer cell viability, apoptosis and cell cycle arrest
using an MTT assay, flow cytometry, transmission electron microscopy and western
blotting. It was determined that quercetin inhibited HT?29 cell viability in a
dose?dependent manner. Cell shrinkage, chromatin condensation and nuclear
collapse were observed in the 50, 100 and 200 µM quercetin groups. The exposure
of HT?29 cells to quercetin led to significant cell cycle arrest in the S?phase.
Western blot analysis revealed that quercetin reduced the protein expression
levels of phosphorylated-Akt and increased CSN6 protein degradation; therefore,
affecting the expression levels of Myc, p53, B?cell lymphoma 2 (Bcl?2) and Bcl?2
associated X protein. The overexpression of CSN6 reduced the effect of quercetin
treatment on HT?29 cells, suggesting that quercetin?induced apoptosis may involve
the Akt?CSN6?Myc signaling axis in HT?29 cells.
|Adaptor Proteins, Signal Transducing/*biosynthesis/genetics
[MESH]