Related Experiment Video
Updated: Feb 17, 2026
Mosaic Zebrafish Transgenesis for Functional Genomic Analysis of Candidate Cooperative Genes in Tumor Pathogenesis
Published on: March 31, 2015
Generation and characterization of Kctd15 mutations in zebrafish
Alison Heffer1, Gregory D Marquart1, Allisan Aquilina-Beck1
1Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States of America.
Potassium channel tetramerization domain containing 15 (Kctd15) loss in zebrafish causes neural crest defects and missing brain regions, leading to smaller size and craniofacial abnormalities. These Kctd15 mutants exhibit significant growth reduction due to developmental deficits.
Area of Science:
- Developmental Biology
- Genetics
- Neuroscience
Background:
- Potassium channel tetramerization domain containing 15 (Kctd15) is implicated in early neural crest (NC) patterning.
- Kctd15 regulates NC marker expression by repressing transcription factor AP-2a and inhibiting Wnt signaling.
Purpose of the Study:
- To investigate the in vivo function of Kctd15 using zebrafish models.
- To characterize the developmental roles of Kctd15 paralogs (kctd15a and kctd15b).
Main Methods:
- Utilized transcription activator-like effector nucleases (TALENs) to create null mutations in zebrafish kctd15a and kctd15b.
- Generated kctd15a/b double mutants to assess combined effects.
- Employed confocal imaging to analyze brain development in mutant larvae.
Main Results:
- kctd15a/b double mutants displayed smaller size, expanded early NC domain, increased pigmentation, and craniofacial defects.
- Melanophore and xanthophore cell numbers and markers were upregulated in double mutants.
- Adult mutants showed maxillary segment deformation and missing barbels; larval brains lacked the torus lateralis (TLa).
Conclusions:
- Kctd15 is essential for proper development of neural crest derivatives and specific central nervous system regions, including the torus lateralis.
- Loss of Kctd15 function leads to significant growth reduction and complex developmental phenotypes.
- Kctd15 plays a critical role in coordinating neural crest and brain development in zebrafish.
