Scientists Can Now Watch ‘Conversations’ Between Cells Across The Body of a Living Animal
We can finally see the whole system in action.
Researchers have developed a groundbreaking imaging technique that allows scientists to observe how cells communicate across different organ systems in living animals. The new method, called WHOLISTIC, captures cellular activity throughout an organism’s entire body in real-time, revealing interactions that were previously impossible to detect. This advancement represents a significant step in bridging the gap between studying individual cells and understanding whole-organism biology.
The technique works by using genetic engineering to make nearly all cells in an organism express fluorescent calcium sensors. Calcium serves as a universal communication signal between cells, and when calcium levels shift, these sensors light up, creating a visual record of cellular “conversations” happening throughout the body. Scientists have successfully tested the method on transparent fish species, including larval zebrafish and the adult-transparent Danionella cerebrum, both important model organisms in biological research.
Initial findings have already produced surprising discoveries. Researchers observed cartilage cells responding to cold temperatures and discovered that the brain’s protective tissue layers reacted to ketamine—responses that had not been previously documented. The whole-body imaging approach has also revealed previously unknown muscle interactions and how the brain stem controls blood flow distribution throughout the body.
Scientists hope this technology will be widely adopted across research institutions worldwide, enabling deeper understanding of how different biological systems work together. Insights gained from studying transparent fish could help researchers better comprehend similar mechanisms occurring in human bodies.
Originally reported by Sciencealert →
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