Abstract:
:A large and diverse array of chemoattractants control leukocyte trafficking, but how these apparently redundant signals collaborate in vivo is still largely unknown. We previously demonstrated an absolute requirement for the lipid chemoattractant leukotriene B(4) (LTB(4)) and its receptor BLT1 for neutrophil recruitment into the joint in autoantibody-induced arthritis. We now demonstrate that BLT1 is required for neutrophils to deliver IL-1 into the joint to initiate arthritis. IL-1-expressing neutrophils amplify arthritis through the production of neutrophil-active chemokines from synovial tissue cells. CCR1 and CXCR2, two neutrophil chemokine receptors, operate nonredundantly to sequentially control the later phase of neutrophil recruitment into the joint and mediate all neutrophil chemokine activity in the model. Thus, we have uncovered a complex sequential relationship involving unique contributions from the lipid mediator LTB(4), the cytokine IL-1, and CCR1 and CXCR2 chemokine ligands that are all absolutely required for effective neutrophil recruitment into the joint.
journal_name
Immunityjournal_title
Immunityauthors
Chou RC,Kim ND,Sadik CD,Seung E,Lan Y,Byrne MH,Haribabu B,Iwakura Y,Luster ADdoi
10.1016/j.immuni.2010.07.018subject
Has Abstractpub_date
2010-08-27 00:00:00pages
266-78issue
2eissn
1074-7613issn
1097-4180pii
S1074-7613(10)00283-9journal_volume
33pub_type
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