[PDF][PDF] Hepatocyte growth factor receptor c-Met instructs T cell cardiotropism and promotes T cell migration to the heart via autocrine chemokine release

I Komarowska, D Coe, G Wang, R Haas, C Mauro… - Immunity, 2015 - cell.com
I Komarowska, D Coe, G Wang, R Haas, C Mauro, M Kishore, D Cooper, S Nadkarni, H Fu…
Immunity, 2015cell.com
Effector-T-cell-mediated immunity depends on the efficient localization of antigen-primed
lymphocytes to antigen-rich non-lymphoid tissue, which is facilitated by the expression of a
unique set of" homing" receptors acquired by memory T cells. We report that engagement of
the hepatocyte growth factor (HGF) receptor c-Met by heart-produced HGF during priming in
the lymph nodes instructs T cell cardiotropism, which was associated with a specialized
homing" signature"(c-Met+ CCR4+ CXCR3+). c-Met signals facilitated T cell recruitment to …
Summary
Effector-T-cell-mediated immunity depends on the efficient localization of antigen-primed lymphocytes to antigen-rich non-lymphoid tissue, which is facilitated by the expression of a unique set of "homing" receptors acquired by memory T cells. We report that engagement of the hepatocyte growth factor (HGF) receptor c-Met by heart-produced HGF during priming in the lymph nodes instructs T cell cardiotropism, which was associated with a specialized homing "signature" (c-Met+CCR4+CXCR3+). c-Met signals facilitated T cell recruitment to the heart via the chemokine receptor CCR5 by inducing autocrine CCR5 ligand release. c-Met triggering was sufficient to support cardiotropic T cell recirculation, while CCR4 and CXCR3 sustained recruitment during heart inflammation. Transient pharmacological blockade of c-Met during T cell priming led to enhanced survival of heart, but not skin, allografts associated with impaired localization of alloreactive T cells to heart grafts. These findings suggest c-Met as a target for development of organ-selective immunosuppressive therapies.
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