Expression of the type 3 InsP3 receptor is a final common event in the development of hepatocellular carcinoma
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View abstract on PubMed
Summary
This summary is machine-generated.The inositol 1,4,5-trisphosphate receptor type 3 (ITPR3) is newly expressed in hepatocellular carcinoma (HCC), a leading cause of cancer death. This novel finding suggests ITPR3 plays a role in liver cancer development and progression.
Area Of Science
- Hepatology
- Oncology
- Molecular Biology
Background
- Hepatocellular carcinoma (HCC) is a major global cancer mortality cause.
- While various signaling pathways are implicated in HCC pathogenesis, a common molecular driver remains elusive.
- Intracellular calcium (Ca2+) signaling is crucial for both normal hepatocyte and liver cancer cell proliferation.
Purpose Of The Study
- Investigate the role of intracellular Ca2+ release channels in HCC.
- Analyze the expression and function of the inositol 1,4,5-trisphosphate receptor type 3 (ITPR3) in HCC.
Main Methods
- Expression analysis of ITPR3 in human liver samples, HCC cells, and mouse liver.
- Evaluation of ITPR3 promoter DNA methylation profiles in HCC.
- Assessment of ITPR3 effects on cellular proliferation and apoptosis.
- In vivo studies in mice to evaluate de novo ITPR3 expression effects on Ca2+ signaling and liver growth.
Main Results
- ITPR3 was absent in normal hepatocytes but highly expressed in HCC across diverse patient cohorts.
- Increased ITPR3 expression correlated with poorer patient survival.
- The ITPR3 gene was demethylated in HCC specimens.
- Pharmacological demethylation induced ITPR3 expression, enhanced Ca2+ signaling, proliferation, and liver regeneration in mice.
- ITPR3 deletion promoted apoptosis in human HCC cells.
Conclusions
- De novo expression of ITPR3 is a common event in HCC.
- ITPR3 likely contributes to the pathogenesis of hepatocellular carcinoma.
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