Liver cancer: Molecular signaling pathway of tumor development decoded

In their research, the international team led by MedUni Vienna, built on earlier study results that had suggested the involvement of certain transcription factors (c-Fos and c-Jun) in the development of hepatocellular carcinomas. Transcription factors are proteins involved in numerous cellular processes, including the control of genes associated with the development of HCC. To advance these findings, the scientists developed a new mouse model.

The experiments carried out with these proteins showed that the combination with previously unexplored (Fra) proteins in this context triggers the cascade of tumour formation. Specifically, this involves the interaction between c-Jun and Fra-2, which the studies showed to be essential in the development of liver cancer. "It is remarkable that we were able to reverse tumour growth by switching off the protein combination of c-Jun and Fra-2," reports the head of the study Erwin Wagner.

The study also showed that tumour growth can be stopped by blocking a specific gene (c-Myc). "Accordingly, our research results suggest that the molecular signalling pathway we have identified represents a promising starting point for further research into HCC and the development of new therapeutic measures," concludes first author Latifa Bakiri.

Hepatocellular carcinoma is an aggressive tumour with rapid progression and limited therapeutic options. Even though the incidence has increased significantly in Western countries in recent decades, this type of cancer is still comparatively rare. However, due to its poor prognosis, HCC is one of the most common causes of cancer-related deaths. HCC occurs in particular in the context of advanced liver disease (cirrhosis, chronic hepatitis B) and is often only diagnosed at a late stage.