Antiphospholipid antibodies and antiphospholipid syndrome: role in portal vein thrombosis in patients with and without liver cirrhosis.
The antiphospholipid syndrome (APS) has been associated with portal vein thrombosis (PVT). This study explored the contribution of antiphospholipid antibodies (aPL) to PVT in cirrhotic and noncirrhotic patients.


METHODS
A total of 50 patients with liver cirrhosis and PVT, 50 patients with liver cirrhosis without PVT, 50 consecutive PVT without liver cirrhosis, and 50 controls. aPL tests: lupus anticoagulants (LAs), immunoglobulin G (IgG) anti-cardiolipin antibodies (aCL), IgG anti-beta-2-glycoprotein-I (β(2)GPI), and IgG β( 2)GPI-complexed with oxidized low-density lipoprotein antibodies (ox-LDL).


RESULTS
Lupus anticoagulants were negative in all patients. A titre of IgG aCL >40 IgG phospholipid units (GPL) was present in 2% of patients with liver cirrhosis and in none of the other groups. In all, 4% of patients with PVT without cirrhosis were positive for IgG β(2)GPI in the absence of any other positive aPL and labelled as primary APS.


CONCLUSIONS
aPL play no role in PVT associated with liver cirrhosis but can be tested in idiopathic PVT.
Amitrano
Lucio
L
Gastroenterology Unit, A. Cardarelli Hospital, Naples, Italy. luamitra@tin.it
Ames
Paul R J
PR
Guardascione
Maria Anna
MA
Lopez
Luis R
LR
Menchise
Antonella
A
Brancaccio
Vincenzo
V
Iannaccone
Luigi
L
Balzano
Antonio
A
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017152:Antibodies, Antiphospholipid / Q000276:immunology*; D016736:Antiphospholipid Syndrome / Q000150:complications / Q000276:immunology*; D005260:Female; D006801:Humans; D008103:Liver Cirrhosis / Q000150:complications / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D011169:Portal Vein; D013927:Thrombosis / Q000150:complications / Q000276:immunology*; D055815:Young Adult
D017152:Antibodies, Antiphospholipid