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Characterizing Epithelial Wound Healing In Vivo Using the Cnidarian Model Organism Clytia hemisphaerica
Published on: February 10, 2023
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Characterizing Epithelial Wound Healing In Vivo Using the Cnidarian Model Organism Clytia hemisphaerica
Elizabeth E L Lee1, Emily Watto1, Jocelyn Malamy2
1Department of Molecular Genetics and Cell Biology, The University of Chicago.
Journal of Visualized Experiments : Jove
|February 27, 2023
Summary
Epithelial wound healing is crucial for all animals. This study uses the transparent Clytia hemisphaerica to visualize and analyze in vivo epithelial repair mechanisms and extracellular matrix interactions.
Area of Science:
- Cell Biology
- Developmental Biology
- Regenerative Medicine
Background:
- Epithelial cells form protective barriers in all animal organs, essential for homeostasis and infection defense.
- Epithelial wound healing involves complex interactions and is challenging to study in vivo due to opaque tissues and inaccessible extracellular matrix (ECM).
- Traditional studies often rely on in vitro cell culture models, limiting the understanding of in vivo healing dynamics.
Purpose of the Study:
- To establish Clytia hemisphaerica as a model organism for studying epithelial wound healing in a live, intact animal.
- To investigate the in vivo mechanisms of epithelial re-epithelialization using high-resolution imaging and manipulation.
- To analyze the role of the extracellular matrix (ECM) in epithelial repair processes.
Main Methods:
- Wounding live Clytia hemisphaerica to create various injury types.
- High-resolution imaging of epithelial wound healing using differential interfering contrast (DIC) microscopy.
- Microinjection of pharmacological agents into the ECM to probe cellular processes and cell:ECM interactions in vivo.
Main Results:
- Clytia's transparent ectodermal epithelium allows visualization of cellular behaviors like lamellipodia formation, purse string contraction, cell stretching, and collective cell migration during wound healing.
- The absence of confounding factors like inflammation and vasculature simplifies the dissection of re-epithelialization events.
- Demonstrated feasibility of manipulating ECM and cellular processes in vivo through microinjection.
Conclusions:
- Clytia hemisphaerica offers a powerful and unique model system for in vivo studies of epithelial wound healing.
- This model facilitates detailed analysis of fundamental re-epithelialization mechanisms and the role of the ECM.
- The methods described enable future research into the molecular and cellular basis of epithelial repair.
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