TGFB1 and Hepatic fibrosis: Based on frequency, keywords with frequency ≥100 mainly focus on “liver fibrosis” and “hepatic stellate cells,” exploring the impact of “tgf beta” signaling pathway on gene and RNA “expression” in HSCs “activation,” “proliferation,” “apoptosis” and other processes; based on centrality, keywords with frequency ≥20 mainly focus on HSCs “activation” and “inhibition,” studying “extracellular matrix,” “TGF-β,” “receptor,” “expression,” “apoptosis” and “cirrhosis” through “in vivo” experiments.