Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=27280401
&cmd=llinks): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 215
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\27280401
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 PLoS+Biol
2016 ; 14
(6
): e1002474
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Membrane Tension Acts Through PLD2 and mTORC2 to Limit Actin Network Assembly
During Neutrophil Migration
#MMPMID27280401
Diz-Muņoz A
; Thurley K
; Chintamen S
; Altschuler SJ
; Wu LF
; Fletcher DA
; Weiner OD
PLoS Biol
2016[Jun]; 14
(6
): e1002474
PMID27280401
show ga
For efficient polarity and migration, cells need to regulate the magnitude and
spatial distribution of actin assembly. This process is coordinated by reciprocal
interactions between the actin cytoskeleton and mechanical forces. Actin
polymerization-based protrusion increases tension in the plasma membrane, which
in turn acts as a long-range inhibitor of actin assembly. These interactions form
a negative feedback circuit that limits the magnitude of membrane tension in
neutrophils and prevents expansion of the existing front and the formation of
secondary fronts. It has been suggested that the plasma membrane directly
inhibits actin assembly by serving as a physical barrier that opposes protrusion.
Here we show that efficient control of actin polymerization-based protrusion
requires an additional mechanosensory feedback cascade that indirectly links
membrane tension with actin assembly. Specifically, elevated membrane tension
acts through phospholipase D2 (PLD2) and the mammalian target of rapamycin
complex 2 (mTORC2) to limit actin nucleation. In the absence of this pathway,
neutrophils exhibit larger leading edges, higher membrane tension, and profoundly
defective chemotaxis. Mathematical modeling suggests roles for both the direct
(mechanical) and indirect (biochemical via PLD2 and mTORC2) feedback loops in
organizing cell polarity and motility-the indirect loop is better suited to
enable competition between fronts, whereas the direct loop helps spatially
organize actin nucleation for efficient leading edge formation and cell movement.
This circuit is essential for polarity, motility, and the control of membrane
tension.