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2016 ; 11
(5
): e0156079
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
The Lymphatic Endothelial mCLCA1 Antibody Induces Proliferation and Growth of
Lymph Node Lymphatic Sinuses
#MMPMID27224029
Jordan-Williams KL
; Ramanujam N
; Farr AG
; Ruddell A
PLoS One
2016[]; 11
(5
): e0156079
PMID27224029
show ga
Lymphocyte- and leukocyte-mediated lymph node (LN) lymphatic sinus growth
(lymphangiogenesis) is involved in immune responses and in diseases including
cancer and arthritis. We previously discovered a 10.1.1 Ab that recognizes the
lymphatic endothelial cell (LEC) surface protein mCLCA1, which is an interacting
partner for LFA1 and Mac-1 that mediates lymphocyte adhesion to LECs. Here, we
show that 10.1.1 Ab treatment specifically induces LEC proliferation, and
influences migration and adhesion in vitro. Functional testing by injection of
mice with 10.1.1 Ab but not control hamster Abs identified rapid induction of LN
LEC proliferation and extensive lymphangiogenesis within 23 h. BrdU pulse-chase
analysis demonstrated incorporation of proliferating LYVE-1-positive LEC into the
growing medullary lymphatic sinuses. The 10.1.1 Ab-induced LN remodeling involved
coordinate increases in LECs and also blood endothelial cells, fibroblastic
reticular cells, and double negative stroma, as is observed during the LN
response to inflammation. 10.1.1 Ab-induced lymphangiogenesis was restricted to
LNs, as mCLCA1-expressing lymphatic vessels of the jejunum and dermis were
unaffected by 23 h 10.1.1 Ab treatment. These findings demonstrate that 10.1.1 Ab
rapidly and specifically induces proliferation and growth of LN lymphatic sinuses
and stroma, suggesting a key role of mCLCA1 in coordinating LN remodeling during
immune responses.