Evidence for an anti-inflammatory loop centered on polymorphonuclear leukocyte formyl peptide receptor 2/lipoxin A4 receptor and operative in the inflamed microvasculature.
Evidence for an anti-inflammatory loop centered on polymorphonuclear leukocyte formyl peptide receptor 2/lipoxin A4 receptor and operative in the inflamed microvasculature.
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DOI:
10.4049/jimmunol.1003145
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发表时间:
2011-04-15
期刊:
影响因子:
--
通讯作者:
Perretti M
中科院分区:
文献类型:
--
作者:
Brancaleone V;Dalli J;Bena S;Flower RJ;Cirino G;Perretti M
The importance of proresolving mediators in the overall context of resolution of acute inflammation is accepted and prominent, though little is known on whether these anti-inflammatory and pro-resolving molecules act in concert. Here we focused on lipoxin A4 (LXA4) and annexin A1 (AnxA1) since these two very different mediators converge on a single receptor, formyl peptide receptor type 2 (acronym FPR2/ALX). Addition of LXA4 to human PMN provoked a concentration- and time-dependent mobilization of AnxA1 onto the plasma membrane, as determined by western blotting and flow cytometry analyses. This property was shared by another FPR2/ALX agonist, antiflammin-2 (AF2), and partly by fMLP or peptide Ac2-26 (an AnxA1 derivative which can activate all three members of the human FPR family). An FPR2/ALX antagonist blocked AnxA1 mobilization activated by LXA4 and AF2. Analysis of PMN degranulation patterns and phospho-AnxA1 status suggested a model where the two FPR2/ALX agonists mobilize the cytosolic (and not the granular) pool of AnxA1 through an intermediate phosphorylation step. Intravital microscopy investigations of the inflamed mesenteric microvasculature of wild type and AnxA1−/− mice revealed that LXA4 provoked leukocyte detachment from the post-capillary venule endothelium in the former (>50% within 10 min; P<0.05), but not the latter genotype (~15%; NS). Furthermore, recruitment of Gr1+ cells into dorsal air pouches, inflamed with IL-1β, was significantly attenuated by LXA4 in wild type, but not AnxA1−/− mice. Collectively, these data prompt us to propose the existence of an endogenous network in anti-inflammation centred on PMN AnxA1 and activated by selective FPR2/ALX agonists.
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影响因子:
--
作者:
CHAN, CC;NI, M;NUSSENBLATT, RB
通讯作者:
NUSSENBLATT, RB
影响因子:
6
作者:
Dalli, Jesmond;Rosignoli, Guglielmo;Perretti, Mauro
通讯作者:
Perretti, Mauro
影响因子:
30.5
作者:
Haworth, Oliver;Cernadas, Manuela;Levy, Bruce D.
通讯作者:
Levy, Bruce D.
DOI:
10.4049/jimmunol.181.7.5035
发表时间:
2008-10-01
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Babbin BA;Laukoetter MG;Nava P;Koch S;Lee WY;Capaldo CT;Peatman E;Severson EA;Flower RJ;Perretti M;Parkos CA;Nusrat A
通讯作者:
Nusrat A
影响因子:
5.5
作者:
Chatterjee, BE;Yona, S;Perretti, M
通讯作者:
Perretti, M