Presence of HRS (p<0.0001, HR 11.3,

95%CI 8.6-15.05) was associated with MAPK Inhibitor Library chemical structure highest risk of mortality on multivariate analysis. Conclusion: The prevalence, spectrum, natural history and mortality of AKI in ACLF is distinctly different from patients with CLD. Patients with ACLF and HRS have the highest risk of mortality. Disclosures: The following people have nothing to disclose: Rakhi Maiwall, Suman Kumar, Chitranshu Vashishtha, Manoj Kumar, Hitendra K. Garg, Sumanlata Nayak, Sunil Taneja, Bhaskar Thakur, Shiv K. Sarin Background: Hepatopulmonary syndrome (HPS) occurs in 20-30% of patients with liver cirrhosis and is associated with a > 2fold increased mortality. Pulmonary angiogenesis and endothelial dysfunction seem to play a central role in its

pathogenesis. von Willebrand factor antigen (vWF-Ag), a marker of endothelial dysfunction, is significantly elevated in patients with liver cirrhosis and portal hypertension. vWF levels Panobinostat are associated with increased pulmonary angiogenesis in a rat model of HPS. Single nucleotide polymorphisms (SNPs) in the vWF-gene are associated with HPS. Aim of the present study was to evaluate the relevance of vWF-Ag as a diagnostic marker for HPS in patients with cirrhosis. For this purpose we considered assessment of vWF-Ag as index test and HPS screening as reference standard. Methods: 145 patients (107 male, 38 female; mean age: 56 years) with liver cirrhosis were included in this prospective study. vWF-Ag was assessed by

ELISA. All patients were screened for presence Amino acid of clinically significant HPS according to the established criteria (presence of cirrhosis, AaDO2 > 15mmHg & PaO2 < 80mmHg, intrapulmonary vasodilatation in contrast enhanced echocardiography). (1)Results: Criteria of HPS were fulfilled in 31 patients. Liver cirrhosis was caused mainly by alcoholic liver disease (58%), chronic hepatitis C (26%) and others (16%). vWF-Ag level was significantly higher in patients with HPS compared to patients without HPS (423% (IQR, 387% 519%) vs. 315% (IQR, 248%-417); P < 0, 001). In HPS positive subjects vWF-Ag correlated significantly with gas exchange abnormalities (PaO2 (r = 0, 404, P < 0, 05), AaDO2 (r = 0, 426, P < 0, 05). Univariate analysis showed a significant association between vWF-Ag and presence of HPS (OR per 1% increase of vWF-Ag: 1, 016, 95% Cl: 1, 009-1, 023, P < 0, 001). vWF-Ag remained significantly associated with HPS after correction for sex, age, MELD score and hepatic venous pressure gradient in multivariate analysis (OR per 1% increase of vWF-Ag: 1, 019, 95% Cl: 1, 004-1, 035, P < 0, 05). The area under the ROC curve of vWF-Ag for detection of HPS was 0, 838.The best cut off with maximal sensitivity was 328% (sensitivity of 100% and specificity of 53.5%; positive predictive value: 36.9%; negative predictive value: 100%). Positive likelihood ratio was 2, 15 and negative likelihood ratio was 0, 00.