Beyond the Lab: What We Can Learn about Cancer from Wild and Domestic Animals

Area of Science:

• Comparative oncology
• Animal models in cancer research
• Cancer biology

Background:

• Rodent models are crucial for cancer research, offering genetic tools for studying cancer mechanisms.
• However, insights from non-model organisms are vital for a comprehensive understanding of tumor development, prevention, and treatment.
• Alternative animal models provide novel perspectives beyond traditional research subjects.

Purpose of the Study:

• To review the utility of alternative and non-model vertebrates in cancer research.
• To explore animals with negligible tumor development and those highly susceptible to cancer.
• To highlight how these diverse animal models can advance our understanding of cancer.

Main Methods:

• Review of existing literature on cancer incidence and resistance in various animal species.
• Analysis of biological mechanisms conferring cancer protection in specific animals (e.g., naked mole rats, elephants).
• Examination of naturally occurring tumors in susceptible species (e.g., carnivores, poultry) that mimic human cancers.

Main Results:

• Certain small mammals (naked mole rats, bats) and large mammals (elephants, whales) exhibit low cancer rates due to enhanced defense, repair, and cell cycle regulation mechanisms.
• Species like carnivores and poultry spontaneously develop tumors with human-like presentations and pathophysiology.
• Conserved tumor suppressor genes in domestic animals facilitate comparative studies.

Conclusions:

• Studying cancer-resistant animals can reveal protective mechanisms against tumor development.
• Utilizing naturally tumor-prone animals offers valuable models for spontaneous human cancer research without artificial induction.
• Alternative animal models significantly broaden perspectives and techniques in cancer research, opening new avenues for investigation and therapeutic development.