Experimental models for evaluation of radioactive tumor-localizing agents

Area of Science:

• Oncology
• Radiopharmacology
• Comparative Pathology

Background:

• Animal tumor models are essential for research on tumor-localizing agents, despite inherent limitations.
• A comprehensive review of transplantable tumor systems, including their origin, host, site, and radioactive agents, is presented.
• Historical context and technical aspects of animal tumor model development and maintenance are discussed.

Purpose of the Study:

• To review existing animal tumor models for research on tumor-localizing agents.
• To discuss the utility of animal models as predictive systems for human cancer.
• To provide recommendations for future research, including model development and protocol standardization.

Main Methods:

• Literature review of transplantable tumor systems in various animal species.
• Categorization of 48 tumor models based on tissue origin and histological pattern.
• Analysis of quantitative studies on tissue uptake and radionuclide distribution.

Main Results:

• Details 48 tumor models across mice, rats, hamsters, rabbits, and dogs, categorized into seven tables.
• Highlights the advantages of animal models for in vivo radionuclide studies.
• Emphasizes the need for caution when extrapolating animal data to human cancer.

Conclusions:

• Controlled laboratory studies using animal tumor models are vital for advancing tumor-localizing agent research.
• Further investigation into existing models and development of new systems are necessary.
• Standardization of experimental protocols is crucial for reliable and reproducible results in cancer research.