Identification and characterization of the zebrafish pharyngeal arch-specific enhancer for the basic helix-loop-helix transcription factor Hand2
- Authors
- Iklé, J.M., Artinger, K.B., and Clouthier, D.E.
- ID
- ZDB-PUB-120522-7
- Date
- 2012
- Source
- Developmental Biology 368(1): 118-126 (Journal)
- Registered Authors
- Artinger, Kristin Bruk, Clouthier, David
- Keywords
- zebrafish, Hand2, bHLH, transgenic, enhancer, mouse, craniofacial
- MeSH Terms
-
- Cells, Cultured
- Mice, Transgenic
- Animals
- Enhancer Elements, Genetic/genetics*
- Zebrafish Proteins/genetics*
- Gene Knockdown Techniques
- Mice
- Transcription Factors/genetics
- Endothelin-1/genetics
- Base Sequence
- Homeodomain Proteins/genetics
- In Situ Hybridization
- Branchial Region/embryology
- Branchial Region/metabolism*
- Luminescent Proteins/genetics
- Luminescent Proteins/metabolism
- Microscopy, Confocal
- Mice, Inbred C57BL
- Basic Helix-Loop-Helix Transcription Factors/genetics*
- Gene Expression Regulation, Developmental*
- Embryo, Nonmammalian/cytology
- Embryo, Nonmammalian/embryology
- Embryo, Nonmammalian/metabolism
- Sequence Homology, Nucleic Acid
- Animals, Genetically Modified
- Molecular Sequence Data
- Mice, Inbred Strains
- PubMed
- 22595513 Full text @ Dev. Biol.
The development of the vertebrate jaw relies on a network of transcription factors that patterns the dorsal-ventral axis of the pharyngeal arches. Recent findings in both mouse and zebrafish illustrate that the basic-helix-loop-helix transcription factor, Hand2, is crucial in this patterning process. While Hand2 has functionally similar roles in these two species, little is known about the regulatory sequences controlling hand2 expression in zebrafish. Using bioinformatics and Tol2-mediated transgenesis, we have generated zebrafish transgenic reporter lines in which either the mouse or zebrafish arch-specific hand2 enhancer direct expression of a fluorescent reporter. We find that both the mouse and zebrafish enhancers drive early reporter expression in a hand2-specific pattern in the ventral pharyngeal arches of zebrafish embryos. These lines provide useful tools to follow ventral arch cells during vertebrate jaw development while also allowing dissection of hand2 transcriptional regulation during this process.