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Related Experiment Videos

Xmsx-1 modifies mesodermal tissue pattern along dorsoventral axis in Xenopus laevis embryo

R Maeda1, A Kobayashi, R Sekine

  • 1Department of Biology, Faculty of Science, Niigata University, Japan.

Development (Cambridge, England)
|July 1, 1997
PubMed
Summary

Xenopus msx-1 (Xmsx-1) is a target gene of bone morphogenetic protein-4 (BMP-4) signaling. Xmsx-1 influences dorsal-ventral patterning in embryos, affecting mesodermal tissue development.

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Xenopus laevis research

Background:

  • Bone morphogenetic protein-4 (BMP-4) plays a crucial role in embryonic ventralization.
  • Understanding the regulatory pathways controlling BMP-4 activity is essential for deciphering developmental processes.

Purpose of the Study:

  • To investigate the role of Xenopus msx-1 (Xmsx-1) in embryonic development.
  • To determine if Xmsx-1 is a target gene of BMP-4 signaling.
  • To analyze the functional consequences of Xmsx-1 expression on dorsal-ventral patterning.

Main Methods:

  • Whole-mount in situ hybridization to analyze Xmsx-1 expression patterns.
  • RNA injection experiments with BMP-4, activin, and dominant-negative BMP-4 receptor.
  • Analysis of Xmsx-1 expression in response to ventralizing (UV) and dorsalizing (LiCl) treatments.

Related Experiment Videos

  • Histological observation and molecular marker analysis of Xmsx-1 injected embryos.

    • Main Results:

    • Xmsx-1 expression is regulated by BMP-4 signaling and is responsive to treatments affecting dorsal-ventral patterning.
    • Injection of Xmsx-1 RNA into dorsal blastomeres causes ventralization, including microcephaly and altered mesodermal tissue.
    • Xmsx-1 influences mesodermal tissue patterning, inducing alpha-actin and repressing alpha-globin in specific regions.

    Conclusions:

    • Xenopus msx-1 is a direct downstream target gene of BMP-4 signaling.
    • Xmsx-1 plays a significant role in the dorsal-ventral patterning of mesodermal tissues.
    • BMP-4 signaling, through Xmsx-1, contributes to establishing embryonic polarity.