Decreased expression of ING2 gene and its clinicopathological significance in hepatocellular carcinoma

Area of Science:

• Oncology
• Molecular Biology
• Hepatology

Background:

• The Inhibitor of Growth 2 (ING2) protein regulates critical cellular processes like apoptosis and DNA repair.
• ING2's role in activating p53 and p53-mediated apoptosis suggests involvement in liver cancer development (hepatocarcinogenesis).

Purpose of the Study:

• To investigate the role of ING2 in hepatocellular carcinoma (HCC) pathogenesis.
• To analyze the correlation between ING2 expression levels and clinicopathologic factors in primary HCC.
• To determine the prognostic significance of ING2 in HCC.

Main Methods:

• Reverse transcription-polymerase chain reaction (RT-PCR) and Western blot to assess ING2 transcription and protein levels.
• Immunohistochemistry to evaluate ING2 expression in HCC tissues.
• Kaplan-Meier survival analysis and multivariate analysis to assess prognostic value.

Main Results:

• ING2 expression was significantly downregulated at both transcriptional and post-transcriptional levels in HCC tumors compared to non-tumor liver tissues (p=0.004 and p=0.014).
• Reduced ING2 expression was observed in 52.4% of HCC cases and correlated with larger tumor size, specific histopathologic classifications, and elevated serum AFP levels.
• Lower ING2 expression was associated with significantly shorter survival times (p=0.009) and identified as an independent prognostic factor.

Conclusions:

• ING2 plays a role in HCC progression and is a potential tumor suppressor gene.
• Significantly decreased ING2 expression in HCC is linked to an unfavorable prognosis.
• ING2 may serve as a valuable biomarker for predicting HCC patient outcomes.