CXCR4 and Hepatic fibrosis: In the current study, we used CCl4 to induce liver fibrosis to examine the relation between multiple parameters that change with liver fibrosis, such as the serum liver transaminases enzymes, SDF-1α mRNA expression, percentage of CD34 cells, and CXCR4 expression, as a preliminary step to explore changes in which of them is closely correlated with the fibrosis area percentage.