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See-through organs and bodies will accelerate biomedical discoveries
Date:7/31/2014

The ability to see through organs and even the entire body to visualize long-range connections between cells as well as fine-grained cellular structures has been a long-time dream of biologists. A study published by Cell Press July 31st in the journal Cell has now made that dream a reality, revealing simple methods for making opaque organs, bodies, and human tissue biopsies transparent, while keeping the cellular structures and connections intact. The protocols could pave the way for a better understanding of brain-body interactions, more accurate clinical diagnoses and disease monitoring, and a new generation of therapies for conditions ranging from autism to chronic pain.

"Although the idea of tissue clearing has been around for a century, to our knowledge, this is the first study to perform whole-body clearing, as opposed to first extracting and then clearing organs outside the adult body," says senior study author Viviana Gradinaru of the California Institute of Technology. "Our methodology has the potential to accelerate any scientific endeavor that would benefit from whole-organism mapping, including the study of how peripheral nerves and organs can profoundly affect cognition and mental processing, and vice versa."

Three-dimensional maps of intact organs and bodies are crucial for understanding complex, long-distance cellular interactions that play an important role in a range of biological processes. But until now, methods for making whole organs or bodies transparent and thus amenable to imaging and generating 3D maps have been limited to the brain or embryos. Gradinaru and her collaborators previously developed a brain-clearing technique called CLARITY, which involves embedding tissue into hydrogels to preserve its 3D structure and important molecular features, and then using detergents to extract lipids that make the tissue opaque.

In the new study, the researchers set out to make CLARITY suitable for whole o
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Contact: Mary Beth O'Leary
moleary@cell.com
617-397-2802
Cell Press
Source:Eurekalert  

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