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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Cancer+Res
2016 ; 6
(10
): 2162-2177
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Autophagy inhibition promotes epithelial-mesenchymal transition through ROS/HO-1
pathway in ovarian cancer cells
#MMPMID27822409
Zhao Z
; Zhao J
; Xue J
; Zhao X
; Liu P
Am J Cancer Res
2016[]; 6
(10
): 2162-2177
PMID27822409
show ga
Autophagy has been proved to be involved in metastasis of cancers. However, the
detailed mechanisms are still unclear. In this work, we aim to provide the first
study of the role that autophagy plays in migration and invasion in ovarian
cancer cells. Transwell chamber was used to examine migration and invasion
capacities. Western blotting and immunofluorescence were performed to investigate
the expressions of mesenchymal markers (Vimentin, N-cadherin), epithelial marker
(Keratin), transcript factor (Zeb1) and HO-1. Small interfering RNA (siRNA) was
used to generate autophagy defect cells (A2780 Atg7 siRNA and Skov-3 Atg7 siRNA
cells). Reactive oxygen species (ROS) were examined by flow cytometry. We found
Skov-3 cells exhibited a fibroblastoid like phenotype and more invasive ability
with lower level of autophagy than A2780. Transwell chamber showed that autophagy
inhibition promoted migration and invasion capacities of autophagy defect cells.
Western blotting showed that the expressions of mesenchymal markers and
transcript factor were up-regulated, while, the expression of epithelial marker
was down-regulated in autophagy defect cells. Conversely, autophagy induction
could impair the migration and invasion through reversing epithelial-mesenchymal
transition (EMT) in A2780 and Skov-3 cells. Besides, autophagy defect could
increase the level of intracellular ROS and the expression of HO-1. NAC (ROS
scavenging agent) could inhibit the migration and invasion through reversing EMT
and decrease the expression of HO-1. What's more, Znpp (HO-1 inhibitor) impaired
the migration and invasion through reversing EMT. In conclusion, our results
suggest that autophagy inhibition may promote EMT through ROS/HO-1 pathway in
ovarian cancer cells.