Carcinoma, Hepatocellular|Cell Adhesion Molecules|Cell Communication|Cell Line, Tumor|Computational Biology|Drug Design|Gene Expression Profiling|Gene Expression Regulation, Neoplastic|Hep G2 Cells|Hepatic Stellate Cells|Humans|Liver|Liver Neoplasms|NF-kappa B|Oligonucleotide Array Sequence Analysis|Placenta Growth Factor|Pregnancy Proteins|Pregnancy-Associated Plasma Protein-A|Proteomics|Signal Transduction|Transcriptome