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A Non-Invasive, Label-Free Method for Examining Tardigrade Anatomy Using Holotomography
Minh-Triet Hong1,2, Giyoung Lee2, Young-Tae Chang1,2
1Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, Republic of Korea.
Tomography (Ann Arbor, Mich.)
|March 26, 2025
Summary
Holotomography allows high-resolution, 3D imaging of live tardigrades without staining. This advanced technique visualizes internal and external structures, overcoming limitations of traditional methods in tardigrade research.
Area of Science:
- Microscopy and Imaging Technologies
- Tardigrade Biology and Research
Background:
- Holotomography offers advanced, high-resolution 3D imaging.
- It enables visualization of microscopic specimens without fixation or staining.
Purpose of the Study:
- To apply holotomography for imaging live tardigrades (Hypsibius exemplaris).
- To avoid invasive sample preparation and phototoxicity common in other imaging methods.
Main Methods:
- Tardigrade sedation using a low concentration of 7% ethanol.
- Image acquisition and reconstruction using the Tomocube HT-X1 holotomography system.
Main Results:
- Detailed, label-free holotomography images of tardigrade external and internal structures were obtained.
- Specific structures visualized include the digestive tract, brain, ovary, claws, salivary glands, and musculature.
Conclusions:
- Holotomography is a valuable, complementary high-resolution imaging modality for tardigrade research.
- It effectively addresses challenges associated with traditional imaging techniques.
