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2018 ; 9
(ä): 635
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The Contribution of Non-Professional Antigen-Presenting Cells to Immunity and
Tolerance in the Liver
#MMPMID29643856
Mehrfeld C
; Zenner S
; Kornek M
; Lukacs-Kornek V
Front Immunol
2018[]; 9
(ä): 635
PMID29643856
show ga
The liver represents a unique organ biased toward a tolerogenic milieu. Due to
its anatomical location, it is constantly exposed to microbial and food-derived
antigens from the gut and thus equipped with a complex cellular network that
ensures dampening T-cell responses. Within this cellular network, parenchymal
cells (hepatocytes), non-parenchymal cells (liver sinusoidal endothelial cells
and hepatic stellate cells), and immune cells contribute directly or indirectly
to this process. Despite this refractory bias, the liver is capable of mounting
efficient T-cell responses. How the various antigen-presenting cell (APC)
populations contribute to this process and how they handle danger signals
determine the outcome of the generated immune responses. Importantly, liver
mounted responses convey consequences not only for the local but also to systemic
immunity. Here, we discuss various aspects of antigen presentation and its
consequences by the non-professional APCs in the liver microenvironment.