Results 51 to 60 of about 1,253,157 (246)

p38MAPK, ERK and PI3K signaling pathways are involved in C5a-primed neutrophils for ANCA-mediated activation. [PDF]

open access: yesPLoS ONE, 2012
BACKGROUND: The complement system is one of the important contributing factors in the development of antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV).
Jian Hao   +4 more
doaj   +1 more source

Increased C5a receptor expression in sepsis [PDF]

open access: yesJournal of Clinical Investigation, 2002
Excessive production of the complement activation product C5a appears to be harmful during the development of sepsis in rodents. Little is known about the role of the C5a receptor (C5aR) and its presence in different organs during sepsis. Using the cecal ligation/puncture (CLP) model in mice, we show here that C5aR immunoreactivity was strikingly ...
Niels C, Riedemann   +12 more
openaire   +2 more sources

Pharmacological characterization of antagonists of the C5a receptor [PDF]

open access: yesBritish Journal of Pharmacology, 1999
Potent and highly selective small molecule antagonists have recently been developed by us for C5a receptors (C5aR) on human polymorphonuclear leukocytes (PMN). In this study we compared a new cyclic antagonist, F‐[OPdChaWR], with an acyclic derivative, MeFKPdChaWr, for their capacities to bind to C5aR on human PMN and human umbilical artery membranes.
Paczkowski, NJ   +8 more
openaire   +5 more sources

Higher Complement C4 Gene Copy Number Constitutes a Shared Genetic Risk Factor for Giant Cell Arteritis and IgA Vasculitis

open access: yesArthritis &Rheumatology, EarlyView.
Objective Low copy number (CN) of complement C4 isoforms and high CN of retroviral HERV‐K elements are known risk factors for many immune‐mediated inflammatory diseases (IMIDs), often showing sex‐biased effects. Here, we assessed whether CN variation within the C4 gene contributes to giant cell arteritis (GCA) and IgA vasculitis (IgAV), two complex ...
Laura Martínez‐Gutiérrez   +295 more
wiley   +1 more source

C5a and formyl peptide receptor regulation on human monocytes

open access: yes, 1992
Regulation of C5a and formyl-methionine-leucine-phenylalanine-lysine (fMLPL) receptors on human monocytes has been studied using fluorescein-conjugated derivatives and flow cytometry.
Dennis E van Epps   +2 more
core   +1 more source

A dual receptor crosstalk model of G-protein-coupled signal transduction. [PDF]

open access: yesPLoS Computational Biology, 2008
Macrophage cells that are stimulated by two different ligands that bind to G-protein-coupled receptors (GPCRs) usually respond as if the stimulus effects are additive, but for a minority of ligand combinations the response is synergistic.
Patrick Flaherty   +6 more
doaj   +1 more source

Functional roles for C5a receptors in sepsis [PDF]

open access: yesNature Medicine, 2008
The function of the C5a receptors, C5ar (encoded by C5ar) and C5l2 (encoded by Gpr77), especially of C5l2, which was originally termed a 'default receptor', remains a controversial topic. Here we investigated the role of each receptor in the setting of cecal ligation and puncture-induced sepsis by using antibody-induced blockade of C5a receptors and ...
Daniel, Rittirsch   +12 more
openaire   +2 more sources

Complement activation linked to type II interferon signaling in Still disease

open access: yesArthritis &Rheumatology, Accepted Article.
Objective Still disease (SD) is an autoinflammatory syndrome characterized by innate immune dysregulation. While complement can drive inflammation, its involvement in SD remains to be defined. Thus, we aimed to assess complement activation in SD. Methods Complement was assessed using transcriptomic, proteomic, and in vitro approaches. RNA sequencing of
Freya M.C.H. Huijsmans   +115 more
wiley   +1 more source

The role of the host—Neutrophil biology

open access: yesPeriodontology 2000, EarlyView., 2023
Abstract Neutrophilic polymorphonuclear leukocytes (neutrophils) are myeloid cells packed with lysosomal granules (hence also called granulocytes) that contain a formidable antimicrobial arsenal. They are terminally differentiated cells that play a critical role in acute and chronic inflammation, as well as in the resolution of inflammation and wound ...
Iain L. C. Chapple   +4 more
wiley   +1 more source

Protective effect of C5a receptor inhibition after murine reperfused stroke

open access: yes, 2008
OBJECTIVE: The complement cascade has been implicated in cerebral ischemia/reperfusion injury. To develop clinically useful therapies that successfully manipulate the complement cascade, the individual roles of its components must be clearly defined ...
Mack, William J   +8 more
core   +1 more source

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