The human hepatic stellate cell line LX2 was treated with 8 Gy X-ray irradiation and/or 2ng/ml recombinant human TGF-β1. The iTRAQ-based high throughput quantitative proteomic approach was used to obtain a comprehensive view of the protein ensembles affected by irradiation and/or TGF-β1 treatment on LX2. This study provides clues for further investigation of the mechanisms behind radiation-induced liver fibrosis.