Mouse model

A mouse model is a laboratory mouse that has been genetically engineered or selectively bred to mimic human diseases or biological conditions. These specially modified mice carry genetic mutations or alterations that cause them to develop symptoms similar to human health conditions, making them invaluable test subjects for understanding disease mechanisms. Scientists use mouse models to study everything from cancer and diabetes to neurological disorders and infectious diseases, essentially creating a living system that behaves like a diseased human body in miniature.

Mouse models are fundamental tools across biomedical research, including genetics, pharmacology, immunology, and neuroscience. They appear prominently in cancer research, drug development, and studies of inherited genetic diseases. Mice are preferred research subjects because they share approximately 95% of their DNA with humans, have relatively simple genetics that can be precisely manipulated, reproduce quickly, and have a short lifespan that allows researchers to observe disease progression across generations in just a few years.

Creating a mouse model typically involves introducing specific genetic changes into a mouse's DNA, either through traditional breeding or modern techniques like CRISPR gene editing. Think of it like creating a biological blueprint: if scientists want to study what happens when a particular human disease gene malfunctions, they introduce that same mutation into a mouse's genome, and the resulting animal develops similar symptoms and pathological changes to those seen in human patients. By observing how the disease unfolds in these mice—how it progresses, which tissues it affects, and how it responds to treatments—researchers gain insights that directly inform human medicine.

Mouse models have been instrumental in advancing modern medicine, enabling researchers to test new drugs safely before human trials and to understand the genetic basis of diseases that would be impossible to study directly in people. Many current cancer therapies, diabetes treatments, and neurological disease interventions were developed or refined using mouse models, making them essential bridges between basic laboratory science and clinical applications that save human lives.