The Mature Activating Natural Killer Cell Immunologic Synapse is Formed in Distinct Stages

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 2003 Nov 13

PMID 14612578

Citations 128

Authors

Jordan S Orange

K Eliza Harris

Milena M Andzelm

Markus M Valter

Raif S Geha

Jack L Strominger

Affiliations

Soon will be listed here.

Abstract

Natural killer (NK) cells form a structure at their interface with a susceptible target cell called the activating NK cell immunologic synapse (NKIS). The mature activating NKIS contains a central and peripheral supramolecular activation cluster (SMAC), and includes polarized surface receptors, filamentous actin (F-actin) and perforin. Evaluation of the NKIS in human NK cells revealed CD2, CD11a, CD11b and F-actin in the peripheral SMAC (pSMAC) with perforin in the central SMAC. The accumulation of F-actin and surface receptors was rapid and depended on Wiskott-Aldrich syndrome protein-driven actin polymerization. The accumulation at and arrangement of these molecules in the pSMAC was not affected by microtubule depolymerization. The polarization of perforin, however was slower and required intact actin, Wiskott-Aldrich syndrome protein, and microtubule function. Thus the process of CD2, CD11a, CD11b, and F-actin accumulation in the pSMAC and perforin accumulation in the central SMAC of the NKIS are sequential processes with distinct cytoskeletal requirements.

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