Janelia Research Campus is investing $500 million to phase out rodent models, betting instead on AI and transparent fish to map entire brains. Each transitioning researcher will receive $1 million in support, according to The Transmitter. This move challenges traditional neuroscience, which has long relied on complex mammalian models, by proposing that comprehensive brain understanding lies in simpler biological systems and AI-driven analysis.
A Track Record of Mapping the Brain
In 2020, Janelia published the fly "hemibrain" connectome, a detailed synaptic-level brain map. By 2025, it planned to publish the first complete connectome of a fruit fly's entire central nervous system, according to HHMI. These projects prove Janelia's capacity for ambitious, large-scale connectomics. They also set a precedent for the institution's current, even bolder, shift in research focus.
AI and Transparent Fish: The New Tools of Discovery
Janelia is launching two new initiatives: whole-brain imaging of the transparent Danionella fish and an AI-in-the-loop tool for data analysis, according to The Transmitter. The AI tool will process the massive datasets from whole-brain imaging. This integration of AI is critical; it promises to overcome the inherent human limitations in analyzing complex, large-scale neural data.
Why the Shift from Rodents?
Janelia is actively phasing out rodent models, according to The Transmitter. This pivot suggests a belief that traditional rodent models are inefficient for comprehensive neural understanding. Transparent models, like the larval zebrafish, allow for simultaneous imaging of every brain neuron during behavior, a feat impossible with complex, opaque organisms, according to HHMI. The institution prioritizes complete data from these simpler systems, leveraging AI for processing, over the perceived benefits of species complexity.
Supporting the Transition to a New Era
Janelia will provide $1 million in transition funding to each researcher as they conclude rodent projects, according to The Transmitter. This significant financial incentive ensures a smooth transition. It also actively engineers a mass exodus from traditional neuroscience, aiming to establish a new standard for comprehensive brain mapping.
If successful, Janelia's aggressive pivot to simpler models and AI will likely redefine the gold standard for whole-brain understanding, potentially rendering traditional mammalian research obsolete.
