title: Lymphocyte subpopulations and intima media thickness in primary antiphospholipd syndrome.
abstract: The aim of this study was to evaluate a possible association between lymphocyte subsets and intima media thickness (IMT) of carotid arteries in primary antiphospholipid syndrome (PAPS). We used a cross-sectional study on PAPS patients (n = 18) and healthy controls (n = 16). IgG anti-cardiolipin antibody (aCL), IgG anti-beta2glycoprotein-I (anti-beta2GPI), IgG anti-beta2glycoprotein-I complexed to oxidized low-density lipoprotein (oxLDL) and to a specific oxidized moiety of LDL (oxLig1), and beta2GPI-oxLDL were measured by ELISA. Lymphocyte immunophenotyping was performed using pairs of monoclonal antibodies directly labelled with fluorescein isothiocyanate, or phycoerythrin or phycoerythrin-Texas-red-X. Intima media thickness (IMT) of carotid arteries was determined by high-resolution sonography. Total peripheral blood lymphocytes did not differ between PAPS and controls. Memory CD4+/CD45RO + T cells were lower in PAPS than controls (P = 0.0007) as well as CD16+56+ natural killer cells (P = 0.02). In PAPS memory T CD45RO + cells positively correlated with IgG anti-beta2GPI-oxLigl (P = 0.002) and to IMT of carotid arteries (common carotid P = 0.02, bifurcation P = 0.007). Naive CD4+/CD45RA+ T cells inversely correlated with beta2GPI-oxLDL (P = 0.009). The relation between IgG anti-beta2GPI-oxLig1 and IMT of carotid arteries with memory CD45RO + T lymphocytes suggests a role for the latter in PAPS related atherogenesis.
authors.affiliation: Academic Department of Rheumatology, Leeds General Infirmary, Leeds, UK. paxmes@aol.com
authors.forename: P R J
authors.initials: PR
authors.lastname: Ames
authors.forename: C
authors.initials: C
authors.lastname: Tommasino
authors.forename: G
authors.initials: G
authors.lastname: Fossati
authors.forename: E
authors.initials: E
authors.lastname: Matsuura
authors.forename: A
authors.initials: A
authors.lastname: Margarita
authors.forename: A
authors.initials: A
authors.lastname: Saulino
authors.forename: L
authors.initials: L
authors.lastname: Lopez
authors.forename: G
authors.initials: G
authors.lastname: Scenna
authors.forename: V
authors.initials: V
authors.lastname: Brancaccio
mesh_terms: D000328:Adult; D017153:Antibodies, Anticardiolipin / Q000032:analysis; D000974:Antibodies, Antinuclear / Q000032:analysis; D016736:Antiphospholipid Syndrome / Q000000981:diagnostic imaging / Q000276:immunology / Q000473:pathology*; D002339:Carotid Arteries / Q000000981:diagnostic imaging / Q000473:pathology; D005260:Female; D006023:Glycoproteins / Q000032:analysis / Q000276:immunology; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis; D008077:Lipoproteins, LDL / Q000032:analysis / Q000276:immunology; D016131:Lymphocyte Subsets / Q000276:immunology / Q000473:pathology*; D008297:Male; D017539:Tunica Intima / Q000000981:diagnostic imaging / Q000473:pathology*; D017540:Tunica Media / Q000000981:diagnostic imaging / Q000473:pathology*; D014463:Ultrasonography; D053482:beta 2-Glycoprotein I
chemical_list: D017153:Antibodies, Anticardiolipin; D000974:Antibodies, Antinuclear; D006023:Glycoproteins; D007074:Immunoglobulin G; D008077:Lipoproteins, LDL; D053482:beta 2-Glycoprotein I; C099252:oxidized low density lipoprotein