activation of lymphocyte cytolytic machinery: where we are?

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ID: 200027
2013
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Abstract
Target cell recognition by cytotoxic lymphocytes implies the simultaneous engagement and clustering of adhesion and activating receptors followed by the activation of an array of signal transduction pathways. The cytotoxic immune synapse represents the highly specialised dynamic interface formed between the cytolytic effector and its target that allows temporal and spatial integration of signals responsible for a defined sequence of processes culminating with the polarised secretion of lytic granules. Over the last decades, much attention has been given to the molecular signals coupling receptor ligation to the activation of cytolytic machinery. Moreover, in the last ten years the discovery of genetic defects affecting cytotoxic responses greatly boosted our knowledge on the molecular effectors involved in the regulation of discrete phases of cytotoxic process at post-receptor levels. More recently, the use of super resolution and total internal reflection fluorescence imaging technologies added new insights on the dynamic reorganization of receptor and signalling molecules at lytic synapse as well as on the relationship between granule dynamics and cytoskeleton remodelling. To date we have a solid knowledge of the molecular mechanisms governing granule movement and secretion, being not yet fully unravelled the machinery that couples early receptor signalling to the late stage of synapse remodelling and granule dynamics. Here we highlight recent advances in our understanding of the molecular mechanisms acting in the activation of cytolytic machinery, also discussing similarities and differences between NK cells and cytotoxic CD8+ T cells.
Reference Key
egalandrini2013frontiersactivation Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Ricciarda eGalandrini;Cristina eCapuano;Angela eSantoni
Journal sudebno-meditsinskaia ekspertiza
Year 2013
DOI
10.3389/fimmu.2013.00390
URL
http://journal.frontiersin.org/Journal/10.3389/fimmu.2013.00390/full
Keywords
Cytotoxicity signal transduction nk cell allergy cytolytic synapseimmunologic diseases

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