Serially heterotransplanted human prostate tumours as an experimental model

Area of Science:

• Oncology
• Preclinical Cancer Models
• Translational Research

Background:

• Accurate preclinical models are crucial for prostate cancer (PC) therapy development.
• Serial heterotransplantation of human PC tumors in immunodeficient mice is a key model.
• This model involves direct implantation and serial passage of patient tumor biopsies in vivo.

Purpose of the Study:

• To review over 30 years of data on human PC serial heterotransplantation.
• To evaluate the fidelity of heterotransplanted tumors compared to original patient tumors.
• To assess the utility of this model for preclinical cancer therapy research.

Main Methods:

• Characterization of heterotransplanted tumors: histopathology, cytology, karyotype, marker expression, hormone dependency, proliferation, and metastatic potential.
• Comparison of heterotransplanted tumors with original patient tumor specimens.
• Correlation of heterotransplant data with patient clinical outcomes where available.

Main Results:

• Serially heterotransplanted human tumors closely resemble their tumors of origin in various characteristics.
• The model demonstrates hormone dependency (androgen-dependent, partially, or independent) and metastatic potential.
• Stromal and vascular components are evaluated for similarity to the primary tumor.

Conclusions:

• Serial heterotransplantation provides a highly accurate preclinical model for prostate cancer.
• This model is more effective than older genetic or serially passaged models for evaluating novel PC therapies.
• The model is valuable for testing androgen-deprivation agents, anti-cancer drugs, anti-angiogenic compounds, and imaging agents.