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2015 ; 48
(7
): 369-70
Nephropedia Template TP
gab.com Text
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English Wikipedia
TAGLN2-mediated actin stabilization at the immunological synapse: implication for
cytotoxic T cell control of target cells
#MMPMID26129675
Na BR
; Jun CD
BMB Rep
2015[Jul]; 48
(7
): 369-70
PMID26129675
show ga
Actin dynamics is critical for the formation and sustainment of the immunological
synapse (IS) during T cell interaction with antigen-presenting cells (APC). Thus,
many actin regulating proteins are involved in spatial and temporal actin
remodeling at the IS. However, little is known whether or how actin stabilizing
protein controls IS and the consequent T cell functions. TAGLN2 - an
actin-binding protein predominantly expressed in T cells - displays a novel
function to stabilize cortical F-actin, thereby augmenting F-actin contents at
the IS, and acquiring leukocyte function-associated antigen-1 activation
following T cell activation. TAGLN2 also competes with cofilin to protect F-actin
in vitro and in vivo. During cytotoxic T cell interaction with cancer cells, the
expression level of TAGLN2 at the IS correlates with the T cell adhesion to
target cancer cells and production of lytic granules such as granzyme B and
perforin, thus expressing cytotoxic T cell function. These findings identify a
novel function for TAGLN2 as an actin stabilizing protein that is essential for
stable immunological synapse formation, thereby regulating T cell immunity.