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Cited by 216

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Spatial expression of Hox cluster genes in the ontogeny of a sea urchin

Arenas-Mena, César, Cameron, Andrew R., Davidson, Eric H.·2000·Development

Abstract

The Hox cluster of the sea urchin Strongylocentrous purpuratus contains ten genes in a 500 kb span of the genome. Only two of these genes are expressed during embryogenesis, while all of eight genes tested are expressed during development of the adult body plan in the larval stage. We report the spatial expression during larval development of the five ‘posterior’ genes of the cluster: SpHox7, SpHox8, SpHox9/10, SpHox11/13a and SpHox11/13b. The five genes exhibit a dynamic, largely mesodermal program of expression. Only SpHox7 displays extensive expression within the pentameral rudiment itself. A spatially sequential and colinear arrangement of expression domains is found in the somatocoels, the paired posterior mesodermal structures that will become the adult perivisceral coeloms. No such sequential expression pattern is observed in endodermal, epidermal or neural tissues of either the larva or the presumptive juvenile sea urchin. The spatial expression patterns of the Hox genes illuminate the evolutionary process by which the pentameral echinoderm body plan emerged from a bilateral ancestor.

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Metadata

Authors
Arenas-Mena, C., Cameron, A. R., & Davidson, E. H.
Venue
Development
Published
2000-11-01
Volume
127
Issue
21
Pages
4631-4643
ISSN
  • 0950-1991 (ISSN-L)
  • 1477-9129
OpenAlex
W2102631576
Cited by
216
References
8
FWCI
2.93
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Spatial expression of Hox cluster genes in the ontogeny of a sea urchin. https://app.cochat.ai/papers/10.1242/dev.127.21.4631
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Arenas-Mena, C., Cameron, A. R., & Davidson, E. H. (2000). Spatial expression of Hox cluster genes in the ontogeny of a sea urchin. Development. https://doi.org/10.1242/dev.127.21.4631

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