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2015 ; 10
(7
): e0131771
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gab.com Text
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English Wikipedia
Huaier Extract Induces Autophagic Cell Death by Inhibiting the mTOR/S6K Pathway
in Breast Cancer Cells
#MMPMID26134510
Wang X
; Qi W
; Li Y
; Zhang N
; Dong L
; Sun M
; Cun J
; Zhang Y
; Lv S
; Yang Q
PLoS One
2015[]; 10
(7
): e0131771
PMID26134510
show ga
Huaier extract is attracting increased attention due to its biological
activities, including antitumor, anti-parasite and immunomodulatory effects.
Here, we investigated the role of autophagy in Huaier-induced cytotoxicity in
MDA-MB-231, MDA-MB-468 and MCF7 breast cancer cells. Huaier treatment inhibited
cell viability in all three cell lines and induced various large membranous
vacuoles in the cytoplasm. In addition, electron microscopy, MDC staining,
accumulated expression of autophagy markers and flow cytometry revealed that
Huaier extract triggered autophagy. Inhibition of autophagy attenuated
Huaier-induced cell death. Furthermore, Huaier extract inhibited the mammalian
target of the rapamycin (mTOR)/S6K pathway in breast cancer cells. After
implanting MDA-MB-231 cells subcutaneously into the right flank of BALB/c nu/nu
mice, Huaier extract induced autophagy and effectively inhibited xenograft tumor
growth. This study is the first to show that Huaier-induced cytotoxicity is
partially mediated through autophagic cell death in breast cancer cells through
suppression of the mTOR/S6K pathway.
|*Autophagy
[MESH]
|Animals
[MESH]
|Apoptosis
[MESH]
|Biological Products/*pharmacology
[MESH]
|Breast Neoplasms/metabolism/*pathology
[MESH]
|Bridged-Ring Compounds/*pharmacology
[MESH]
|Cell Line, Tumor
[MESH]
|Drug Screening Assays, Antitumor
[MESH]
|Drugs, Chinese Herbal
[MESH]
|Female
[MESH]
|Humans
[MESH]
|In Situ Nick-End Labeling
[MESH]
|MCF-7 Cells
[MESH]
|Mice
[MESH]
|Mice, Inbred BALB C
[MESH]
|Neoplasm Transplantation
[MESH]
|RNA, Small Interfering/metabolism
[MESH]
|Ribosomal Protein S6 Kinases, 70-kDa/antagonists & inhibitors/*metabolism
[MESH]