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Updated: Jul 3, 2026

Pre-clinical Orthotopic Murine Model of Human Prostate Cancer
Published on: August 29, 2016
Src family kinase oncogenic potential and pathways in prostate cancer as revealed by AZD0530
1Department of Urology, University of California at Davis, Sacramento, CA 95817, USA.
Abstract:
Prostate cancer is the most frequently diagnosed cancer in American men. We have previously demonstrated that Src mediates androgen-independent proliferation in prostate cancer. We sought to investigate the Src-mediated oncogenic pathways and tumor biology using AZD0530, a novel Src family kinase/Abl dual-kinase inhibitor that is entering phase II clinical trials. We show that while both Src and Abl are expressed in all prostate cancer cell lines, Src but not Abl is activated in the prostate. Furthermore, Src activation is inhibited by AZD0530 in a rapid and dose-dependent manner. We show that Src mediates cell proliferation in DU145 and PC3 cells at the G1 phase of cell cycle. Src inhibition resulted in decreased binding of beta-catenin to the promoters of G1 phase cell cycle regulators cyclin D1 and c-Myc. C-Myc may also be regulated at the protein level by extracellular signal-regulated kinase 1/2 and GSK3beta. Cell motility factors focal adhesion kinase, p130CAS and paxillin activation in DU145 and PC3 cells were also inhibited. Administration of AZD0530 in mice reduced orthotopic DU145 xenograft growth by 45%. We have further delineated the Src-mediated oncogenic growth and migration pathways in prostate cancer and established mechanistic rationale for Src inhibition as novel therapy in the treatment of prostate cancer.
Insights
Src, a protein kinase, drives prostate cancer growth and migration. Inhibiting Src with AZD0530 significantly reduced tumor growth in mice, suggesting Src inhibition is a promising therapeutic strategy for prostate cancer.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Prostate cancer is the most common cancer in American men.
- Src kinase activity promotes androgen-independent proliferation in prostate cancer.
- Src family kinases (SFKs) are implicated in various cancers, including prostate cancer.
Purpose of the Study:
- To investigate Src-mediated oncogenic pathways in prostate cancer using AZD0530, a novel SFK/Abl dual-kinase inhibitor.
- To determine the efficacy of AZD0530 in inhibiting Src activation and downstream signaling.
- To evaluate the therapeutic potential of AZD0530 in preclinical models of prostate cancer.
Main Methods:
- Utilized prostate cancer cell lines (DU145, PC3) and orthotopic mouse xenograft models.
- Assessed Src and Abl kinase expression and activation status.
- Administered AZD0530 to inhibit Src activity and evaluated effects on cell cycle regulators (cyclin D1, c-Myc), cell motility factors (FAK, p130CAS, paxillin), and tumor growth.
Main Results:
- Src, not Abl, is activated in prostate cancer cells.
- AZD0530 rapidly and dose-dependently inhibited Src activation.
- Src inhibition decreased cell proliferation by affecting G1 phase regulators and reduced cell motility.
- AZD0530 administration reduced tumor growth in a xenograft model by 45%.
Conclusions:
- Src kinase is a key mediator of prostate cancer cell proliferation and migration.
- AZD0530 effectively inhibits Src activation and downstream oncogenic pathways.
- Targeting Src with AZD0530 demonstrates significant preclinical efficacy, supporting its development as a novel prostate cancer therapy.
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