Wiskott-Aldrich syndrome protein is required for regulatory T cell homeostasis.

Invariant NKT Cells Required for Homeostasis and Function of Wiskott-Aldrich Syndrome Protein Is

The Wiskott-Aldrich syndrome protein permits assembly of a focused immunological synapse enabling sustained T-cell receptor signaling.

BACKGROUND T-cell activation relies on the assembly of the immunological synapse, a structure tightly regulated by the actin cytoskeleton. The precise role of the Wiskott-Aldrich syndrome protein, an actin cytoskeleton regulator, in linking immunological synapse structure to downstream signaling remains to be clarified. DESIGN AND METHODS To address this point, CD4(+) T cells from patients wi...

Wiskott-Aldrich Syndrome (WAS): A Case Report in Mauritius and Review

Wiskott-Aldrich is an X-lined recessive disorder typically characterized by thrombocytopenia, eczema and recurrent infections. We report the four year treatment progress of a six year old boy who initially presented with vesicular lesions over the trunk, upper and lower extremities and face and blood tinged stools at the age of 2 weeks. From the family pedigree, there were two suspected cases t...

The Wiskott-Aldrich syndrome protein is required for the function of CD4+CD25+Foxp3+ regulatory T cells

The Wiskott-Aldrich syndrome, a primary human immunodeficiency, results from defective expression of the hematopoietic-specific cytoskeletal regulator Wiskott-Aldrich syndrome protein (WASP). Because CD4(+)CD25(+)Foxp3(+) naturally occurring regulatory T (nTreg) cells control autoimmunity, we asked whether colitis in WASP knockout (WKO) mice is associated with aberrant development/function of n...

WASp-dependent actin cytoskeleton stability at the dendritic cell immunological synapse is required for extensive, functional T cell contacts

The immunological synapse is a highly structured and molecularly dynamic interface between communicating immune cells. Although the immunological synapse promotes T cell activation by dendritic cells, the specific organization of the immunological synapse on the dendritic cell side in response to T cell engagement is largely unknown. In this study, confocal and electron microscopy techniques we...