title: Hemodialysis duration, human platelet antigen HPA-3 and IgA isotype of anti-β2glycoprotein I antibodies are associated with native arteriovenous fistula failure in Tunisian hemodialysis patients.
abstract: BACKGROUND
  Arteriovenous fistula (AVF) failure is a major cause of morbidity and mortality in hemodialysis patients. We assessed the role of a large panel of acquired and inherited thrombophilic markers in cases of AVF thrombosis among 101 Tunisians on chronic hemodialysis, all with native AVF.
  
  
  METHODS
  In this case-control study, we considered the levels of fibrinogen, factor II, factor VII, factor VIII, factor IX, factor X, factor XI, factor XII, von Willebrand factor, natural coagulation inhibitors, D-Dimer, homocysteine, IgG, IgM and IgA anticardiolipin and anti-β2glycoprotein I (anti-β2GPI), and anti-H/PF4 antibodies; the presence of Lupus Anticoagulant; and genetic markers (Factor V Leiden, prothrombin 20210G>A, MTHFR 677C>T and 1298A>C).
  
  
  RESULTS
  Multivariate analysis indicated that dialysis for >69 months (OR=10.12; 95% CI, 2.53 to 40.52; p=0.001), HPA-3aa genotype (OR=3.58; 95% CI, 1.36 to 9.4; p=0.01) and anti-β2GPI IgA isotype (OR=3.4; 95% CI, 1.21 to 9.55; p=0.02) were independent risk factors for AVF thrombosis in Tunisian hemodialysis patients. Kaplan-Meier analysis showed that AVF survival was significantly lower for patients with anti-β2GPI IgA than for patients without this isotype (log-rank test, p=0.014).
  
  
  CONCLUSIONS
  IgA anti-β2GPI may be of clinical relevance among Tunisians. Further studies on the polymorphism of β2GPI and HPA systems would be helpful for identifying patient groups at high risk of AVF failure.
authors.affiliation: Laboratoire d'Hématologie et Banque du Sang 03/UR/08-18, CHU Sahloul, 4000, Sousse, Tunisia.
authors.forename: Samira
authors.initials: S
authors.lastname: Hadhri
authors.forename: Mohamed Ben
authors.initials: MB
authors.lastname: Rejeb
authors.forename: Anis
authors.initials: A
authors.lastname: Belarbia
authors.forename: Abdellatif
authors.initials: A
authors.lastname: Achour
authors.forename: Hadef
authors.initials: H
authors.lastname: Skouri
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017152:Antibodies, Antiphospholipid / Q000276:immunology; D016824:Antigens, Human Platelet / Q000276:immunology*; D001164:Arteriovenous Fistula / Q000097:blood / Q000209:etiology* / Q000276:immunology*; D001323:Autoantibodies / Q000097:blood / Q000276:immunology*; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D007070:Immunoglobulin A / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D006435:Renal Dialysis / Q000009:adverse effects / Q000379:methods*; D012307:Risk Factors; D014416:Tunisia; D055815:Young Adult; D053482:beta 2-Glycoprotein I / Q000276:immunology*
chemical_list: D017152:Antibodies, Antiphospholipid; D016824:Antigens, Human Platelet; D001323:Autoantibodies; D007070:Immunoglobulin A; D053482:beta 2-Glycoprotein I