The cytoskeleton coordinates the early events of B-cell activation.
B cells contribute to protective adaptive immune responses through generation of antibodies and long-lived memory cells, following engagement of the B-cell receptor (BCR) with specific antigen. Recent imaging investigations have offered novel insights into the ensuing molecular and cellular events underlying B-cell activation. Following engagement with antigen, BCR microclusters form and act as sites of active signaling through the recruitment of intracellular signaling molecules and adaptors. Signaling through these "microsignalosomes" is propagated and enhanced through B-cell spreading in a CD19-dependent manner. Subsequently, the mature immunological synapse is formed, and functions as a platform for antigen internalization, enabling the antigen presentation to helper T cells required for maximal B-cell activation. In this review, we discuss the emerging and critical role for the cytoskeleton in the coordination and regulation of these molecular events during B-cell activation.
Lymphocyte Interaction Laboratory, Cancer Research UK London Research Institute, Lincoln's Inn Fields Laboratories, London WC2A 3LY, United Kingdom.
Naomi E
NE
Harwood
Facundo D
FD
Batista
D056704:Adaptive Immunity / Q000276:immunology*; D018941:Antigens, CD19 / Q000276:immunology; D001402:B-Lymphocytes / Q000276:immunology*; D003599:Cytoskeleton / Q000276:immunology*; D006801:Humans; D008213:Lymphocyte Activation / Q000276:immunology*; D011947:Receptors, Antigen, B-Cell / Q000276:immunology / Q000378:metabolism*; D015398:Signal Transduction / Q000276:immunology*
D018941:Antigens, CD19; D011947:Receptors, Antigen, B-Cell