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
-
- Branchial Region/embryology
- Branchial Region/metabolism*
- Gene Expression Regulation, Developmental*
- Animals
- Luminescent Proteins/genetics
- Luminescent Proteins/metabolism
- Mice, Inbred Strains
- Mice
- Mice, Inbred C57BL
- Microscopy, Confocal
- Cells, Cultured
- Embryo, Nonmammalian/cytology
- Embryo, Nonmammalian/embryology
- Embryo, Nonmammalian/metabolism
- Sequence Homology, Nucleic Acid
- Gene Knockdown Techniques
- Enhancer Elements, Genetic/genetics*
- Molecular Sequence Data
- Transcription Factors/genetics
- In Situ Hybridization
- Endothelin-1/genetics
- Animals, Genetically Modified
- Homeodomain Proteins/genetics
- Zebrafish Proteins/genetics*
- Basic Helix-Loop-Helix Transcription Factors/genetics*
- Base Sequence
- Mice, Transgenic
- 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.