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2015 ; 6
(18
): 15966-83
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Vimentin contributes to epithelial-mesenchymal transition cancer cell mechanics
by mediating cytoskeletal organization and focal adhesion maturation
#MMPMID25965826
Liu CY
; Lin HH
; Tang MJ
; Wang YK
Oncotarget
2015[Jun]; 6
(18
): 15966-83
PMID25965826
show ga
Modulations of cytoskeletal organization and focal adhesion turnover correlate to
tumorigenesis and epithelial-mesenchymal transition (EMT), the latter process
accompanied by the loss of epithelial markers and the gain of mesenchymal markers
(e.g., vimentin). Clinical microarray results demonstrated that increased levels
of vimentin mRNA after chemotherapy correlated to a poor prognosis of breast
cancer patients. We hypothesized that vimentin mediated the reorganization of
cytoskeletons to maintain the mechanical integrity in EMT cancer cells. By using
knockdown strategy, the results showed reduced cell proliferation, impaired wound
healing, loss of directional migration, and increased large membrane extension in
MDA-MB 231 cells. Vimentin depletion also induced reorganization of cytoskeletons
and reduced focal adhesions, which resulted in impaired mechanical strength
because of reduced cell stiffness and contractile force. In addition,
overexpressing vimentin in MCF7 cells increased cell stiffness, elevated cell
motility and directional migration, reoriented microtubule polarity, and
increased EMT phenotypes due to the increased ?1-integrin and the loss of
junction protein E-cadherin. The EMT-related transcription factor slug was also
mediated by vimentin. The current study demonstrated that vimentin serves as a
regulator to maintain intracellular mechanical homeostasis by mediating
cytoskeleton architecture and the balance of cell force generation in EMT cancer
cells.