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2016 ; 2016
(ä): 7650260
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Cellular Barriers after Extravasation: Leukocyte Interactions with Polarized
Epithelia in the Inflamed Tissue
#MMPMID26941485
Reglero-Real N
; García-Weber D
; Millán J
Mediators Inflamm
2016[]; 2016
(ä): 7650260
PMID26941485
show ga
During the inflammatory response, immune cells egress from the circulation and
follow a chemotactic and haptotactic gradient within the tissue, interacting with
matrix components in the stroma and with parenchymal cells, which guide them
towards the sites of inflammation. Polarized epithelial cells compartmentalize
tissue cavities and are often exposed to inflammatory challenges such as toxics
or infections in non-lymphoid tissues. Apicobasal polarity is critical to the
specialized functions of these epithelia. Indeed, a common feature of epithelial
dysfunction is the loss of polarity. Here we review evidence showing that
apicobasal polarity regulates the inflammatory response: various polarized
epithelia asymmetrically secrete chemotactic mediators and polarize adhesion
receptors that dictate the route of leukocyte migration within the parenchyma. We
also discuss recent findings showing that the loss of apicobasal polarity
increases leukocyte adhesion to epithelial cells and the consequences that this
could have for the inflammatory response towards damaged, infected or transformed
epithelial cells.