



@article {2223,
	title = {Simulations of the NK cell immune synapse reveal that activation thresholds can be established by inhibitory receptors acting locally},
	journal = {Journal of ImmunologyJ. Immunol.},
	volume = {187},
	year = {2011},
	note = {Cited By (since 1996): 2Export Date: 21 November 2012Source: ScopusCODEN: JOIMAdoi: 10.4049/jimmunol.1002208PubMed ID: 21690326Language of Original Document: EnglishCorrespondence Address: Mehr, R.; Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel; email: ramit.mehr@biu.ac.ilChemicals/CAS: Vav protein, 282122-55-8; intercellular adhesion molecule 1, 126547-89-5; H-2 Antigens; Histocompatibility Antigens Class I; Intercellular Adhesion Molecule-1, 126547-89-5; KLRK1 protein, human; Lymphocyte Function-Associated Antigen-1; MHC class I-related chain A; NK Cell Lectin-Like Receptor Subfamily A; NK Cell Lectin-Like Receptor Subfamily K; Receptors, KIRReferences: Burgess, S.J., Maasho, K., Masilamani, M., Narayanan, S., Borrego, F., Coligan, J.E., The NKG2D receptor: Immunobiology and clinical implications (2008) Immunol. Res., 40, pp. 18-34;Gonz{\'a}lez, S., L{\'o}pez-Soto, A., Suarez-Alvarez, B., L{\'o}pez-V{\'a}zquez, A., L{\'o}pez-Larrea, C., NKG2D ligands: Key targets of the immune response (2008) Trends Immunol., 29, pp. 397-403; 
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},
	month = {2011///},
	pages = {760 - 773},
	abstract = {NK cell activation is regulated by a balance between activating and inhibitory signals. To address the question of how these signals are spatially integrated, we created a computer simulation of activating and inhibitory NK cell immunological synapse (NKIS) assembly, implementing either a "quantity-based" inhibition model or a "distance-based" inhibition model. The simulations mimicked the observed molecule distributions in inhibitory and activating NKIS and yielded several new insights. First, the total signal is highly influenced by activating complex dissociation rates but not by adhesion and inhibitory complex dissociation rates. Second, concerted motion of receptors in clusters significantly accelerates NKIS maturation. Third, when the potential of a cis interaction between Ly49 receptors and MHC class I on murine NK cells was added to the model, the integrated signal as a function of receptor and ligand numbers was only slightly increased, at least up to the level of 50\% cis-bound Ly49 receptors reached in the model. Fourth, and perhaps most importantly, the integrated signal behavior obtained when using the distance-based inhibition signal model was closer to the experimentally observed behavior, with an inhibition radius of the order 3-10 molecules. Microscopy to visualize Vav activation in NK cells on micropatterned surfaces of activating and inhibitory strips revealed that Vav is only locally activated where activating receptors are ligated within a single NK cell contact. Taken together, these data are consistent with a model in which inhibitory receptors act locally; that is, that every bound inhibitory receptor acts on activating receptors within a certain radius around it. Copyright {\textcopyright} 2011 by The American Association of Immunologists, Inc.},
	keywords = {animal cell, animal experiment, Animals, antigen recognition, article, cell maturation, cell membrane, Computer simulation, controlled study, dissociation, H-2 Antigens, Histocompatibility Antigens Class I, HLA antigen, HLA C antigen, Humans, immunological synapse, Immunological Synapses, intercellular adhesion molecule 1, Intercellular Adhesion Molecule-1, killer cell immunoglobulin like receptor 2DL1, Killer Cells, Natural, lymphocyte activation, lymphocyte function associated antigen 1, Lymphocyte Function-Associated Antigen-1, major histocompatibility antigen class 1, Membrane Microdomains, Mice, Models, Immunological, mouse, natural killer cell, natural killer cell receptor NKG2D, NK Cell Lectin-Like Receptor Subfamily A, NK Cell Lectin-Like Receptor Subfamily K, nonhuman, priority journal, protein assembly, Receptors, KIR, signal transduction, steady state, Vav protein},
	isbn = {00221767 (ISSN)},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-79960517468\&partnerID=40\&md5=71d9c497ce196d28399f8205f992b389},
	author = {Kaplan, A. and Kotzer, S. and Almeida, C.R. and Kohen, R. and Halpert, G. and Salmon-Divon, M. and K{\"o}hler, K. and H{\"o}glund, P. and Davis, D.M. and Mehr, R.}
}
