Journal
JOURNAL OF IMMUNOLOGY RESEARCH
Volume 2015, Issue -, Pages -Publisher
HINDAWI LTD
DOI: 10.1155/2015/754373
Keywords
-
Categories
Funding
- Associazione Italiana Ricerca per la Ricerca sul Cancro- (AIRC-) Special Project 5x1000 [9962]
- PRIN
- Progetto di Ricerca di Ateneo
- Progetto di Ricerca Fondazione Carige
Ask authors/readers for more resources
The KIR2DS4 receptor is the oldest KIR2DS expressed by human NK lymphocytes. The specificity of recognition of this receptor for various HLA class I alleles has been demonstrated; however it remains poorly understood whether these interactions may result in the activation of some specific functions in NK cells. Here, we examined the functional outcome of the KIR2DS4/HLA class I interaction by the use of an alternative functional system based on the ability of KIR2DS4 to regulate the mechanism of trogocytosis by NK cells. We demonstrate that KIR2DS4 can induce the uptake of CCR7 by KIR2DS4(+) NKG2A(+) NK cell clones after interacting with CCR7(+) target cells expressing HLA-Cw4 and HLA-Cw6 alleles. However this interaction is not always sufficient to override the inhibition generated by NKG2A expressed on the same NK cells. The recognition of HLA-Cw4 was confirmed by experiments of cytotoxicity against HLA-C-transfected cells. We also show that, different from resting NK cells, the acquisition of CCR7 in response to IL-18 cannot occur in IL2-activated NK cells because of a marked downregulation in their IL-18R alpha expression. As a consequence trogocytosis represents the major mechanism by which KIR2DS4(+) activated NK cells acquire the expression of this chemokine receptor.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available