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An Oncogenic Hepatocyte-Induced Orthotopic Mouse Model of Hepatocellular Cancer Arising in the Setting of Hepatic Inflammation and Fibrosis
Published on: September 12, 2019
Nanoparticle-formulated siRNA targeting integrins inhibits hepatocellular carcinoma progression in mice
Roman L Bogorad1, Hao Yin1, Anja Zeigerer2
11] David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA [2].
Abstract:
Integrins play an important role during development, regulating cell differentiation, proliferation and survival. Here we show that knockdown of integrin subunits slows down the progression of hepatocellular carcinoma (HCC). Using nanoparticulate delivery of short interfering RNAs targeting β1 and αv integrin subunits, we downregulate all integrin receptors in hepatocytes. Short-term integrin knockdown (2 weeks) does not cause apparent structural or functional perturbations of normal liver tissue. Alterations in liver morphology accumulate on sustained integrin downregulation (7 weeks). The integrin knockdown leads to significant retardation of HCC progression, reducing proliferation and increasing tumour cell death. This tumour retardation is accompanied by reduced activation of the MET oncogene as well as expression of its mature form on the cell surface. Our data suggest that transformed proliferating cells from HCC are more sensitive to knockdown of integrins than normal quiescent hepatocytes, highlighting the potential of small interfering RNA-mediated inhibition of integrins as an anti-cancer therapeutic approach.
Insights
Targeting integrins with short interfering RNA (siRNA) significantly slows hepatocellular carcinoma (HCC) progression by reducing cancer cell proliferation and increasing cell death. This approach shows promise for HCC therapy.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Integrins are crucial for cell development, regulating differentiation, proliferation, and survival.
- Hepatocellular carcinoma (HCC) progression involves complex cellular mechanisms that can be targeted for therapeutic intervention.
Purpose of the Study:
- To investigate the effect of integrin subunit knockdown on hepatocellular carcinoma (HCC) progression.
- To evaluate the therapeutic potential of small interfering RNA (siRNA)-mediated integrin inhibition in HCC.
Main Methods:
- Utilized nanoparticulate delivery of short interfering RNAs (siRNAs) targeting β1 and αv integrin subunits.
- Assessed the impact of sustained integrin downregulation on liver tissue morphology, HCC progression, proliferation, and cell death.
- Analyzed the activation and cell surface expression of the MET oncogene.
Main Results:
- Integrin knockdown significantly retarded HCC progression, reducing tumour cell proliferation and increasing apoptosis.
- Sustained integrin downregulation (7 weeks) led to observable alterations in liver morphology.
- Reduced activation and cell surface expression of the MET oncogene were observed in conjunction with tumour retardation.
- Normal hepatocytes showed less sensitivity to integrin knockdown compared to transformed HCC cells.
Conclusions:
- Small interfering RNA-mediated inhibition of integrins demonstrates potential as an anti-cancer therapeutic strategy for HCC.
- Transformed HCC cells are more susceptible to integrin knockdown than normal hepatocytes, suggesting a targeted therapeutic window.
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