Conversion of Fibroblasts to Hepatocyte-Like Cells In Vivo.

In vivo conversion of fibroblasts into hepatocyte-like cells provides one potential approach for the treatment of liver fibrosis. In our previous study, we showed in vivo conversion of myofibroblasts into induced hepatocytes (iHeps) by forced expression of four transcription factors in genetic fate-tracing mouse model of chronic liver disease. These in vivo-generated iHeps showed similar expression profile with endogenous hepatocytes (eHeps) and also exhibited similar functional characteristics, such as albumin secretion, urea synthesis, cytochrome activity, and drug responsiveness. Furthermore, the targeted expression of our reprogramming factors in myofibroblasts attenuated liver fibrosis. Our study suggests that in vivo reprogramming may open new perspectives for the treatment of diseases such as liver fibrosis.