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Expression of the Dan gene during chicken embryonic development
1Department of Molecular Embryology, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, 260-8670, Chiba, Japan.
Abstract:
The Dan gene was first identified as the putative rat tumor suppressor gene and encodes a protein structurally related to Cerberus and Gremlin in vertebrates. Xenopus DAN, as with Cerberus and Gremlin, was demonstrated to block bone morphogenetic protein (BMP) signaling by binding BMPs, and to be capable of inducing additional anterior structures by ectopic overexpression in Xenopus embryos. DAN, thus, is suggested to play pivotal roles in early patterning and subsequent organ development, as in the case of other BMP antagonists. In this report, we isolated the chicken counterpart of Dan. Chicken Dan is mainly expressed in the cephalic and somitic mesoderm and several placodes during organ development.
Insights
Researchers identified the chicken Dan gene, a bone morphogenetic protein (BMP) antagonist. This gene plays a role in early embryonic development, similar to its counterparts in other species, by regulating BMP signaling pathways.
Area of Science:
- Developmental Biology
- Molecular Biology
- Genetics
Background:
- The Dan gene, identified as a tumor suppressor in rats, encodes a protein homologous to vertebrate Cerberus and Gremlin.
- Xenopus DAN antagonizes bone morphogenetic protein (BMP) signaling by binding BMPs and can induce anterior structures upon ectopic expression.
Purpose of the Study:
- To isolate and characterize the chicken homolog of the Dan gene.
- To investigate the expression pattern of chicken Dan during embryonic development.
Main Methods:
- Gene isolation techniques.
- Expression analysis using techniques like in situ hybridization (implied).
Main Results:
- The chicken Dan gene was successfully isolated.
- Chicken Dan exhibits specific expression patterns in the cephalic mesoderm, somites, and placodes during organogenesis.
Conclusions:
- Chicken Dan functions as a BMP antagonist, similar to its Xenopus ortholog.
- The expression pattern suggests a role for chicken Dan in the development of head structures, somites, and sensory organs.