New mouse model captures disease progression, from gut to brain

A new mouse model, known as the G51D model, replicates the early and progressive symptoms of Parkinson’s disease, starting with nonmotor signs such as diminished smell and gastrointestinal issues before motor problems like gait and balance emerge. Unlike other models that only overexpress alpha-synuclein, this model better simulates the disease's progression, providing insights into early cellular changes and allowing for testing of experimental therapies. The model was created using CRISPR-Cas9 to introduce a Parkinson’s-related mutation in mice. It helps track molecular events and may aid in identifying disease biomarkers and testing treatments. Researchers note that while the model closely mimics human Parkinson’s progression, it remains challenging to fully replicate the effects of the disease due to differences in aging between mice and humans.