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The role of the dorsal lip in the induction of heart mesoderm in Xenopus laevis | JoVE Visualize

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The role of the dorsal lip in the induction of heart mesoderm in Xenopus laevis

A K Sater¹, A G Jacobson

¹Department of Zoology, University of Texas, Austin 78712.

Development (Cambridge, England)|March 1, 1990

View abstract on PubMed

Summary

Heart development requires interaction between the dorsal lip of the blastopore and specific dorsolateral deep mesoderm during gastrulation. This interaction is crucial for initiating heart mesoderm formation via a dorsalizing signal.

Area of Science:

Developmental biology
Embryology
Molecular signaling

Background:

Gastrulation is a critical period for embryonic development.
Understanding tissue interactions is key to deciphering developmental processes.
Heart formation is a complex process initiated early in embryonic development.

Purpose of the Study:

To investigate the specific tissue interactions governing heart-forming potency during gastrulation.
To identify the regions and signaling mechanisms involved in early heart development.

Main Methods:

Comparative analysis of explants from different marginal zone regions.
Transplantation experiments involving the dorsal lip of the blastopore.
Observation of heart formation in manipulated embryos.

Main Results:

Heart-forming potency is restricted to explants with both the dorsal lip and specific dorsolateral deep mesoderm.
Removal of these regions impairs heart formation, while preserving the dorsal lip allows some heart formation.
Transplantation of the dorsal lip can induce a secondary axis with a host-derived heart.

Conclusions:

The dorsal lip of the blastopore provides a crucial dorsalizing signal.
Interaction between the dorsal lip and dorsolateral deep mesoderm is essential for expressing heart-forming potency.
This interaction initiates the establishment of heart mesoderm during gastrulation.

Biomedical Engineering

Tissue Engineering

The Role Of The Dorsal Lip In The Induction Of Heart Mesoderm In Xenopus Laevis