Reshaping the immunosuppressive niche in hepatocellular carcinoma: crosstalk networks, metabolic reprogramming, and therapeutic strategies.

The liver tumor microenvironment plays a pivotal role in hepatocellular carcinoma (HCC) progression by fostering immune suppression, which impairs anti-tumor responses and enables tumor growth, invasion, and metastasis. This review integrates recent advances in understanding the multifaceted mechanisms of immune evasion in HCC, including dysregulated immune cell interactions, metabolic adaptations that reshape immune function, and early activation of inhibitory checkpoints. Key contributors such as regulatory immune subsets and stromal elements are examined, alongside emerging insights into pre-metastatic niches and metabolic barriers. The review also evaluates current immunotherapeutic approaches targeting these mechanisms, highlighting clinical progress, challenges, and opportunities for precision interventions. By synthesizing these elements, this work provides a foundational framework for advancing strategies to overcome HCC's immunosuppressive ecosystem.