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2016 ; 23
(6
): 979-89
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Do not let death do us part: find-me signals in communication between dying
cells and the phagocytes
#MMPMID26891690
Medina CB
; Ravichandran KS
Cell Death Differ
2016[Jun]; 23
(6
): 979-89
PMID26891690
show ga
The turnover and clearance of cells is an essential process that is part of many
physiological and pathological processes. Improper or deficient clearance of
apoptotic cells can lead to excessive inflammation and autoimmune disease. The
steps involved in cell clearance include: migration of the phagocyte toward the
proximity of the dying cells, specific recognition and internalization of the
dying cell, and degradation of the corpse. The ability of phagocytes to recognize
and react to dying cells to perform efficient and immunologically silent
engulfment has been well-characterized in vitro and in vivo. However, how
apoptotic cells themselves initiate the corpse removal and also influence the
cells within the neighboring environment during clearance was less understood.
Recent exciting observations suggest that apoptotic cells can attract phagocytes
through the regulated release of 'find-me' signals. More recent studies also
suggest that these find-me signals can have additional roles outside of phagocyte
attraction to help orchestrate engulfment. This review will discuss our current
understanding of the different find-me signals released by apoptotic cells, how
they may be relevant in vivo, and their additional roles in facilitating
engulfment.