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Updated: Jul 5, 2026
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Transient Optical Clearing Using Absorbing Molecules for Ex Vivo and In Vivo Imaging
Published on: July 11, 2025
In vivo tissue clearing with tartrazine and other dye molecules
Victoria Crunkleton1,2, Guosong Hong3,4
1Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
Communications Biology
|July 3, 2026
Summary
Tartrazine and other dyes offer a new way to make live animal tissues transparent for imaging. This review explores how these dyes work and future directions for in vivo tissue clearing.
Area of Science:
- Biomedical Engineering
- Optical Imaging
- Molecular Biology
Background:
- Tissue opacity limits deep tissue imaging in live animals.
- Absorbing molecules, like tartrazine, are emerging as novel tissue-clearing agents.
- Achieving transient and reversible optical transparency is crucial for in vivo studies.
Purpose of the Study:
- To review the physical principles behind tissue opacity.
- To outline engineering strategies for developing advanced dye-based clearing agents.
- To summarize recent progress in dye-enabled in vivo tissue clearing.
Main Methods:
- Analysis of fundamental physical origins of tissue opacity.
- Extraction of engineering principles for designing new clearing agents.
- Review of current literature on dye-enabled in vivo tissue clearing.
Main Results:
- Dye-based agents, including tartrazine, show promise for in vivo tissue clearing.
- Understanding light scattering and absorption is key to improving clearing agents.
- Recent advances facilitate transient and reversible optical transparency.
Conclusions:
- Dye-based tissue clearing is a rapidly advancing field with significant potential.
- Further research is needed to overcome current challenges in in vivo clearing.
- Future perspectives focus on optimizing dye properties and clearing protocols for enhanced imaging.
