Integrative characterization of human hepatocellular carcinoma-derived organoids and their HBV-associated biology.

BACKGROUND

Hepatocellular carcinoma (HCC) is one of the most aggressive malignancies and is characterized by a high degree of heterogeneity. However, HCC treatment remains difficult, highlighting the need to better define molecular subgroups of HCC and understand their potential relationships with therapeutic response.

METHODS

In this study, we established 20 patient-derived organoids and 12 patient-derived cell lines from 20 individuals diagnosed with HCC. These models were comprehensively characterized using whole-exome sequencing, RNA sequencing, drug screening, and hepatitis B virus (HBV)-targeting PCR with a focus on HBV-related HCC.

RESULTS

Based on transcriptomic profiling, this study classified HCC into two molecular subtypes, aligning with previously reported classifications. Drug screening revealed that the greater enrichment of the PI3K/AKT/mTOR signalling pathway was associated with increased sensitivity to everolimus and lenvatinib. Integrated transcriptomic and drug-response analyses further identified candidate genes associated with lenvatinib response. In addition, polymerase chain reaction (PCR) analysis targeting the HBV surface, core, and X genes demonstrated noticeable discrepancies relative to the clinically reported HBV infection status. Notably, HBV DNA detection was associated with activation of the calcium signalling pathway and oxaliplatin response.

CONCLUSIONS

This study provides a valuable resource for investigating the biology and pharmacological characteristics of HCC, particularly in the context of molecular subtypes and HBV-associated mechanisms. Ultimately, these findings offer additional insights into HCC heterogeneity and drug response and may serve as a basis for further investigation of molecular determinants of therapeutic response.