PHF8 Plays an Oncogene Function in Hepatocellular Carcinoma Formation.

Area of Science:

• Oncology
• Molecular Biology
• Biochemistry

Background:

• Hepatocellular carcinoma (HCC) presents significant global health challenges with increasing incidence and mortality.
• The regulatory mechanisms underlying HCC progression remain incompletely understood.
• Plant homeodomain finger protein 8 (PHF8), a JmjC domain-containing protein, has been implicated in various cancers, but its role in HCC is unexplored.

Purpose of the Study:

• To investigate the biological function and clinical significance of PHF8 in hepatocellular carcinoma (HCC).
• To elucidate the role of PHF8 in HCC growth, proliferation, migration, invasion, and metastasis.

Main Methods:

• Bioinformatics analysis to identify differentially expressed PHF8 in HCC tissues.
• Immunohistochemistry to assess PHF8 protein levels in human HCC and adjacent noncancerous tissues.
• In vitro experiments involving PHF8 knockdown and overexpression in HCC cell lines to evaluate proliferation, migration, invasion, and sphere formation.
• In vivo studies using nude mice to assess the effect of PHF8 overexpression on tumor formation and metastasis.
• RNA-sequence assay to identify downstream targets of PHF8.

Main Results:

• PHF8 was found to be differentially expressed in primary and metastatic HCC tissues.
• Immunohistochemistry confirmed higher PHF8 expression in HCC tissues compared to adjacent noncancerous tissues.
• Silencing PHF8 inhibited HCC cell proliferation, migration, invasion, and sphere formation.
• Overexpression of PHF8 enhanced these malignant properties in vitro.
• In vivo, PHF8 overexpression promoted tumor formation and metastasis in nude mice.
• RNA-sequencing revealed that CUL4A is upregulated by PHF8.

Conclusions:

• PHF8 functions as a novel oncogene in hepatocellular carcinoma (HCC).
• PHF8 promotes HCC progression, including proliferation and metastasis.
• PHF8 may represent a potential therapeutic target for HCC treatment.
• The findings provide new insights into the molecular mechanisms driving HCC development.