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Molecular Carcinogenesis

Molecular Carcinogenesis

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Silmitasertib in Combination With Cabozantinib Impairs Liver Cancer Cell Cycle Progression, Induces Apoptosis, and Delays Tumor Growth in a Preclinical Model

Published:1 January 2025 DOI: 10.1002/mc.23827 PMID: 39377735
Yuki Haga,?Ranjit Ray,?Ratna B Ray

Abstract

The rising incidence of hepatocellular carcinoma (HCC) is a global problem. Several approved treatments, including immune therapy and multi-tyrosine kinase inhibitors, are used for treatment, although the results are not optimum. There is an unmet need to develop highly effective chemotherapies for HCC. Targeting multiple pathways to attack cancer cells is beneficial. Cabozantinib is an orally available bioactive multikinase inhibitor and has a modest effect on HCC treatment. Silmitasertib is an orally bioavailable, potent CK2 inhibitor with a direct role in DNA damage repair and is in clinical trials for other cancers. In this study, we planned to repurpose these existing drugs on HCC treatment. We observed a stronger antiproliferative effect of these two combined drugs on HCC cells generated from different etiologies as compared to the single treatment. Global RNA-seq analyses revealed a decrease in the expression of G2/M cell cycle transition genes in HCC cells following combination treatment, suggesting G2 phase cell arrest. We observed G2/M cell cycle phase arrest in HCC cells upon combination treatment compared to the single-treated or vehicle-treated control cells. The downregulation of CCNA2 and CDC25C following combination therapy further supported the observation. Subsequent analyses demonstrated that combination treatment inhibited 70?kDa ribosomal protein S6 kinase (p70S6K) phosphorylation, and increased Bim expression. Apoptosis of HCC cells were accompanied by increased poly (ADP-ribose) polymerase cleavage and caspase-9 activation. Next, we observed that a combination therapy significantly delayed the progression of HCC xenograft growth as compared to vehicle control. Together, our results suggested combining cabozantinib and silmitasertib would be a promising treatment option for HCC.

Substances (10)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Cabozantinib 849217-68-1 C28H24FN3O5 488 suppliers $7.00-$2167.00
Cabozantinib 849217-68-1 C28H24FN3O5 488 suppliers $7.00-$2167.00
Cabozantinib 849217-68-1 C28H24FN3O5 488 suppliers $7.00-$2167.00
Cabozantinib 849217-68-1 C28H24FN3O5 488 suppliers $7.00-$2167.00
CX-4945 1009820-21-6 C19H12ClN3O2 204 suppliers $10.00-$4300.00
CX-4945 1009820-21-6 C19H12ClN3O2 204 suppliers $10.00-$4300.00
CX-4945 1009820-21-6 C19H12ClN3O2 204 suppliers $10.00-$4300.00
CX-4945 1009820-21-6 C19H12ClN3O2 204 suppliers $10.00-$4300.00
XL184 849217-68-1 - Inquiry
XL184 849217-68-1 - Inquiry

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