It is a fase I/II clinical study to evaluate feasibility, safety and kinetics of cellular therapy with bone marrow-derived mononuclear cells (ABMMC) in patients with liver cirrhosis. All the patients have moderate liver disfunction and a waiting time expectancy of liver transplantation longer than 12 months due their low MELD score. The ABMMC are labeled with 99mTc and infused through the hepatic artery. Scintigraphy is performed 2 and 24 hours after infusion. Patients are submitted to frequent clinical, laboratorial and image evaluation during the follow up period of 12 months.