Changes in regulation of human monocyte proteins in response to IgG from patients with antiphospholipid syndrome.

Abstract:

:The effects of immunoglobulin G (IgG) from patients with the antiphospholipid syndrome (APS) upon monocyte activation have not been fully characterized. We carried out a comprehensive proteomic analysis of human monocytes treated with IgG from patients with different manifestations of the APS. Using 2-dimensional differential gel electrophoresis (2D DiGE), 4 of the most significantly regulated proteins (vimentin [VIM], zinc finger CCH domain-containing protein 18, CAP Gly domain-containing linker protein 2, and myeloperoxidase) were differentially regulated in monocytes treated with thrombotic or obstetric APS IgG, compared with healthy control (HC) IgG. These findings were confirmed by comparing monocytes isolated from APS patients and HC. Anti-VIM antibodies (AVAs) were significantly increased in 11 of 27 patients (40.7%) with APS. VIM expression on HC monocytes was stimulated more strongly by APS IgG from patients with higher-avidity serum AVA. We further characterized the proteome of thrombotic APS IgG-treated monocytes using a label-free proteomics technique. Of 12 proteins identified with the most confidence, 2 overlapped with 2D DiGE and many possessed immune response, cytoskeletal, coagulation, and signal transduction functions which are all relevant to APS and may therefore provide potential new therapeutic targets of this disease.

journal_name

Blood

journal_title

Blood

authors

Ripoll VM,Lambrianides A,Pierangeli SS,Poulton K,Ioannou Y,Heywood WE,Mills K,Latchman DS,Isenberg DA,Rahman A,Giles IP

doi

10.1182/blood-2014-05-577569

subject

Has Abstract

pub_date

2014-12-11 00:00:00

pages

3808-16

issue

25

eissn

0006-4971

issn

1528-0020

pii

blood-2014-05-577569

journal_volume

124

pub_type

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