An axial Hox code controls tissue segmentation and body patterning in Nematostella vectensis.
Science
; 361(6409): 1377-1380, 2018 09 28.
Article
en En
| MEDLINE
| ID: mdl-30262503
ABSTRACT
Hox genes encode conserved developmental transcription factors that govern anterior-posterior (A-P) pattering in diverse bilaterian animals, which display bilateral symmetry. Although Hox genes are also present within Cnidaria, these simple animals lack a definitive A-P axis, leaving it unclear how and when a functionally integrated Hox code arose during evolution. We used short hairpin RNA (shRNA)-mediated knockdown and CRISPR-Cas9 mutagenesis to demonstrate that a Hox-Gbx network controls radial segmentation of the larval endoderm during development of the sea anemone Nematostella vectensis. Loss of Hox-Gbx activity also elicits marked defects in tentacle patterning along the directive (orthogonal) axis of primary polyps. On the basis of our results, we propose that an axial Hox code may have controlled body patterning and tissue segmentation before the evolution of the bilaterian A-P axis.
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1
Banco de datos:
MEDLINE
Asunto principal:
Anémonas de Mar
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Factores de Transcripción
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Genes Homeobox
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Regulación del Desarrollo de la Expresión Génica
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Tipificación del Cuerpo
Límite:
Animals
Idioma:
En
Año:
2018
Tipo del documento:
Article