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2016 ; 3
(3
): 252-263.e8
Nephropedia Template TP
gab.com Text
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English Wikipedia
Vimentin Intermediate Filaments Template Microtubule Networks to Enhance
Persistence in Cell Polarity and Directed Migration
#MMPMID27667364
Gan Z
; Ding L
; Burckhardt CJ
; Lowery J
; Zaritsky A
; Sitterley K
; Mota A
; Costigliola N
; Starker CG
; Voytas DF
; Tytell J
; Goldman RD
; Danuser G
Cell Syst
2016[Sep]; 3
(3
): 252-263.e8
PMID27667364
show ga
Increased expression of vimentin intermediate filaments (VIFs) enhances directed
cell migration, but the mechanism behind VIFs' effect on motility is not
understood. VIFs interact with microtubules, whose organization contributes to
polarity maintenance in migrating cells. Here, we characterize the dynamic
coordination of VIF and microtubule networks in wounded monolayers of retinal
pigment epithelial cells. By genome editing, we fluorescently labeled endogenous
vimentin and ?-tubulin, and we developed computational image analysis to
delineate architecture and interactions of the two networks. Our results show
that VIFs assemble an ultrastructural copy of the previously polarized
microtubule network. Because the VIF network is long-lived compared to the
microtubule network, VIFs template future microtubule growth along previous
microtubule tracks, thus providing a feedback mechanism that maintains cell
polarity. VIF knockdown prevents cells from polarizing and migrating properly
during wound healing. We suggest that VIFs' templating function establishes a
memory in microtubule organization that enhances persistence in cell polarization
in general and migration in particular.