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Updated: Dec 22, 2025
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Live Imaging of Cell Extrusion from the Epidermis of Developing Zebrafish
Published on: June 27, 2011
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Anionic Quantum Dots reveal actin-microridges in zebrafish epidermis
Valeria Sigot1,2, Paulo E Cabral Filho3, María F Sampedro1,2
1Laboratorio de Microscopía Aplicada a Estudios Moleculares y Celulares, Facultad de Ingeniería, Universidad Nacional de Entre Ríos (UNER), Oro Verde, Argentina.
Methods and Applications in Fluorescence
|May 8, 2020
Summary
Mercaptosuccinic-coated cadmium telluride quantum dots (CdTe QDs) rapidly label cell surfaces in zebrafish embryos. This offers a faster alternative for visualizing cellular structures like actin microridges.
Area of Science:
- Biomedical Engineering
- Materials Science
- Developmental Biology
Background:
- Surface-modified cadmium telluride quantum dots (CdTe QDs) are promising for cell imaging due to enhanced hydrophilicity and functionalization.
- In vitro applications for targeting cell surfaces are established, but in vivo use in animal models remains challenging.
Purpose of the Study:
- To investigate the interaction of mercaptosuccinic acid-coated (MSA) CdTe QDs with the epidermis of zebrafish embryos.
- To evaluate the potential of these QDs as rapid probes for visualizing cellular structures in a live animal model.
Main Methods:
- Utilized mercaptosuccinic acid-coated CdTe QDs for labeling experiments.
- Applied QDs to both living and Carnoy-fixed zebrafish embryos.
- Observed QD localization and visualization of cellular structures using fluorescence microscopy.
Main Results:
- CdTe QDs concentrated along adherent junctions in the zebrafish epidermis.
- QDs revealed the distinct pattern of actin microridges on the apical surface of the enveloping layer.
- Labeling was achieved rapidly (minutes) at submicromolar concentrations in fixed embryos.
Conclusions:
- Anionic MSA-CdTe QDs can effectively label cell surface structures in zebrafish embryos.
- This method provides a significantly faster alternative to traditional immunodetection or Phalloidin staining for actin visualization.
- The study demonstrates the utility of CdTe QDs for rapid cellular imaging in a vertebrate model.
