TLR signaling and effector functions are intact in XLA neutrophils.

Clinical Immunology : the Official Journal of the Clinical Immunology Society
Thomas U MarronCharlotte Cunningham-Rundles

Abstract

Toll-like receptors (TLRs) are essential components of the innate immune system, and their ligands are important activators of neutrophils. Bruton's tyrosine kinase (Btk) has been reported to mediate signaling through toll-like receptors (TLRs) in many cell types, however, the role of Btk in TLR activation of neutrophils remains unclear. Impaired TLR-induced neutrophil function was found in mice with loss of Btk and in humans with TLR-signaling defects, but the integrity of TLR pathways in X-linked agammaglobulinemia (XLA) neutrophils has not been assessed. In this study LPS (TLR4) or an imidazoquinoline compound (TLR7/8) activated XLA neutrophil shedding of surface CD62L, and phosphorylated MAP kinases p38, JNK and ERK. TLR activation also induced normal respiratory burst and retarded apoptosis for XLA neutrophils, comparable to normal controls. These data demonstrate that the loss of Btk in XLA neutrophils does not impair functional responses to TLR signals.

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Citations

May 25, 2011·Cell Research·Joan Ní Gabhann, Caroline A Jefferies
Sep 14, 2011·World Journal of Biological Chemistry·Siamak Sandoghchian ShotorbaniHua-Xi Xu
Nov 18, 2011·The Journal of Allergy and Clinical Immunology·Thomas U MarronCharlotte Cunningham-Rundles
Jul 25, 2015·Clinical Immunology : the Official Journal of the Clinical Immunology Society·Ha-Jung KimSoo-Jong Hong
May 2, 2015·Annals of the New York Academy of Sciences·Paul J MaglioneCharlotte Cunningham-Rundles
Mar 13, 2014·The Journal of Allergy and Clinical Immunology·Vassilios LougarisAlessandro Plebani
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Feb 20, 2018·Molecular Cancer·Simar Pal SinghRudi W Hendriks
Apr 6, 2021·Cancer Immunology, Immunotherapy : CII·Logan GoodWilliam E Carson

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