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DVR-4 (bone morphogenetic protein-4) as a posterior-ventralizing factor in Xenopus mesoderm induction
C M Jones1, K M Lyons, P M Lapan
1Department of Cell Biology, Vanderbilt University School of Medicine, Nashville 37232.
Development (Cambridge, England)
|June 1, 1992
Summary
This study identifies DVR-4 as a key signaling molecule in amphibian development. DVR-4 promotes posterior and ventral mesoderm formation and counteracts dorsalizing signals like activin.
Area of Science:
- Developmental Biology
- Molecular Embryology
Background:
- Mesodermal tissue establishment in amphibians relies on complex inductive signaling pathways.
- Peptide growth factors are implicated as key mediators of these interactions.
Purpose of the Study:
- To investigate the role of DVR-4, a TGF-beta-like molecule, in mesodermal patterning during amphibian embryonic development.
- To elucidate the interaction between DVR-4 and other signaling molecules, such as activin, in establishing the embryonic body plan.
Main Methods:
- Ectopic expression of DVR-4 in amphibian embryos.
- Analysis of mesodermal tissue induction in animal cap explants treated with DVR-4.
- Assessment of DVR-4's effect on dorsalizing signals like activin.
Main Results:
- Ectopic DVR-4 expression resulted in embryos exhibiting posterior and/or ventral characteristics.
- DVR-4 was shown to induce ventral mesoderm types in animal cap explants.
- DVR-4 effectively counteracted the dorsalizing effects of activin.
Conclusions:
- DVR-4 is identified as a novel signaling molecule involved in inducing posteroventral mesoderm.
- DVR-4 plays a crucial role in antagonizing dorsalizing signals, contributing to the establishment of the embryonic body plan.
- The findings provide insights into the intricate molecular interactions governing embryonic axis formation.