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Updated: Jun 21, 2026

Fluorescent Calcium Imaging and Subsequent In Situ Hybridization for Neuronal Precursor Characterization in Xenopus laevis

Fluorescent Calcium Imaging and Subsequent In Situ Hybridization for Neuronal Precursor Characterization in Xenopus laevis

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Imaging morphogenesis, in Xenopus with Quantum Dot nanocrystals.

Panayiota Stylianou¹, Paris A Skourides

¹Department of Biological Sciences, Laboratory of Developmental Biology and BioImaging Technology, University of Cyprus, CY 1678, Nicosia, Cyprus.

Mechanisms of Development

|August 4, 2009

Summary

Near Infra Red Quantum Dots (NIR QDs) enable in vivo imaging of mesoderm migration during Xenopus gastrulation. This study reveals the focal adhesion kinase (FAK) is crucial for mesoderm spreading and migration.

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Last Updated: Jun 21, 2026

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Area of Science:

Developmental Biology
Cell Biology
Biophysics

Background:

Mesoderm migration is a key morphogenetic event in Xenopus gastrulation.
In vivo imaging of deep embryonic tissues is challenging, limiting studies of mesoderm migration.
Previous studies relied on in vitro assays, potentially not reflecting in vivo dynamics.

Purpose of the Study:

To develop and apply Near Infra Red Quantum Dots (NIR QDs) for in vivo imaging of mesoderm migration.
To quantify mesoderm migration rates in vivo with single-cell resolution.
To investigate the role of focal adhesion kinase (FAK) in mesoderm migration during gastrulation.

Main Methods:

Utilized NIR QDs for live imaging of mesoderm cell movements within the Xenopus embryo.
Performed in vitro and in vivo assays to assess mesoderm migration and spreading.
Inhibited focal adhesion kinase (FAK) to study its functional role in mesoderm movement.

Main Results:

NIR QDs successfully enabled high-resolution, in vivo imaging of mesoderm migration.
Quantitative data on mesoderm migration rates in vivo were obtained.
FAK inhibition blocked mesoderm spreading and migration in vitro and in vivo.
Convergent extension movements were unaffected by FAK inhibition, indicating distinct molecular regulation.

Conclusions:

NIR QDs provide a novel tool for in vivo studies of morphogenesis.
FAK plays a critical role in regulating mesoderm spreading and migration during gastrulation.
Mesoderm migration and convergent extension involve distinct molecular mechanisms, with FAK specifically regulating the former.