Crossref journal-article
The Company of Biologists
Development (237)
Abstract

ABSTRACT Zebrafish floating head mutant embryos lack notochord and develop somitic muscle in its place. This may result from incorrect specification of the notochord domain at gastrulation, or from respecification of notochord progen-itors to form muscle. In genetic mosaics, floating head acts cell autonomously. Transplanted wild-type cells differenti-ate into notochord in mutant hosts; however, cells from floating head mutant donors produce muscle rather than notochord in wild-type hosts. Consistent with respecifica-tion, markers of axial mesoderm are initially expressed in floating head mutant gastrulas, but expression does not persist. Axial cells also inappropriately express markers of paraxial mesoderm. Thus, single cells in the mutant midline transiently co-express genes that are normally specific to either axial or paraxial mesoderm. Since floating head mutants produce some floor plate in the ventral neural tube, midline mesoderm may also retain early signaling capabilities. Our results suggest that wild-type floating head provides an essential step in maintaining, rather than initiating, development of notochord-forming axial mesoderm.

Bibliography

Halpern, M. E., Thisse, C., Ho, R. K., Thisse, B., Riggleman, B., Trevarrow, B., Weinberg, E. S., Postlethwait, J. H., & Kimmel, C. B. (1995). Cell-autonomous shift from axial to paraxial mesodermal development in zebrafish floating head mutants. Development, 121(12), 4257–4264.

Authors 9 University of Pennsylvania
  1. M. E. Halpern (first)
  2. C. Thisse (additional)
  3. R. K. Ho (additional)
  4. B. Thisse (additional)
  5. B. Riggleman (additional)
  6. B. Trevarrow (additional)
  7. E. S. Weinberg (additional) University of Pennsylvania
  8. J. H. Postlethwait (additional)
  9. C. B. Kimmel (additional)
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Dates
Type When
Created 4 years, 4 months ago (April 25, 2021, 10:15 p.m.)
Deposited 7 months, 2 weeks ago (Jan. 15, 2025, 10:27 a.m.)
Indexed 1 month, 1 week ago (July 24, 2025, 8:22 a.m.)
Issued 29 years, 9 months ago (Dec. 1, 1995)
Published 29 years, 9 months ago (Dec. 1, 1995)
Published Online 29 years, 9 months ago (Dec. 1, 1995)
Published Print 29 years, 9 months ago (Dec. 1, 1995)
Funders 0

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@article{Halpern_1995, title={Cell-autonomous shift from axial to paraxial mesodermal development in zebrafish floating head mutants}, volume={121}, ISSN={1477-9129}, url={http://dx.doi.org/10.1242/dev.121.12.4257}, DOI={10.1242/dev.121.12.4257}, number={12}, journal={Development}, publisher={The Company of Biologists}, author={Halpern, M. E. and Thisse, C. and Ho, R. K. and Thisse, B. and Riggleman, B. and Trevarrow, B. and Weinberg, E. S. and Postlethwait, J. H. and Kimmel, C. B.}, year={1995}, month=dec, pages={4257–4264} }