Tissue inhibitor of matrix metalloprotinase-1 and collagen type IV in HCV-associated cirrhosis and grading of esophageal varices

Abstract

Esophageal varices are abnormally dilated submucosal veins of the esophagus which develop as a result of portal hypertension due to cirrhosis. Collagen type IV is upregulated with a 14-fold increase in cirrhosis. Tissue inhibitor of metalloproteinases-1 (TIMP-1) is also upregulated during hepatic fibrogenesis and considered to promote fibrosis in the injured liver. The objective of this research was to study the serum levels of tissue inhibitor of matrix metalloprotinase-1 and serum collagen type IV in patients with post hepatitis C cirrhosis and their relation to the different grades of esophageal varices. This study was carried out on one hundred and twenty individuals classified into three groups: Group I included thirty patients with liver cirrhosis without esophageal varices. Group II included sixty patients with liver cirrhosis with esophageal varices. Group III included thirty healthy volunteers as controls. A significant positive correlation was found between collagen type IV and the presence of esophageal varices in esophageal varices group (p = 0001*). Also, a significant positive correlation was found between TIMP-1 and the presence of esophageal varices in esophageal varices group (p = 0.033*). After conducting multivariate logistic regression analysis, collagen type IV and INR were found to be independent risk factors for esophageal varices in patients with cirrhosis. The serum collagen type IV and TIMP-1 levels are useful markers for predicting of presence of esophageal varices.