Divergent patterns of neural development in larval echinoids and asteroids

Yoko Nakajima, Hiroyuki Kaneko, Greg Murray, Robert D. Burke

Research output: Contribution to journalArticle

104 Citations (Scopus)

Abstract

The development and organization of the nervous systems of echinoderm larvae are incompletely described. We describe the development and organization of the larval nervous systems of Strongylocentrotus purpuratus and Asterina pectinifera using a novel antibody, 1E11, that appears to be neuron specific. In the early pluteus, the antibody reveals all known neural structures: apical ganglion, oral ganglia, lateral ganglia, and an array of neurons and neurites in the ciliary band, the esophagus, and the intestine. The antibody also reveals several novel features, such as neurites that extend to the posterior end of the larva and additional neurons in the apical ganglion. Similarly, in asteroid larvae the antibody binds to all known neural structures and identifies novel features, including large numbers of neurons in the ciliary bands, a network of neurites under the oral epidermis, cell bodies in the esophagus, and a network of neurites in the intestine. The 1E11 antigen is expressed during gastrulation and can be used to trace the ontogenies of the nervous systems. In S. purpuratus, a small number of neuroblasts arise in the oral ectoderm in late gastrulae. The cells are adjacent to the presumptive ciliary bands, where they project neurites with growth cone-like endings that interconnect the neurons. In A. pectinifera, a large number of neuroblasts appear scattered throughout the ectoderm of gastrulae. The cells aggregate in the developing ciliary bands and then project neurites under the oral epidermis. Although there are several shared features of the larval nervous systems of echinoids and asteroids, the patterns of development reveal fundamental differences in neural ontogeny.

Original languageEnglish
Pages (from-to)95-104
Number of pages10
JournalEvolution and Development
Volume6
Issue number2
DOIs
Publication statusPublished - 2004 Mar

Fingerprint

Minor Planets
neurites
neurodevelopment
Neurites
nervous system
asteroid
antibody
Ganglia
neurons
Nervous System
mouth
Asterina
Neurons
Asterina pectinifera
larva
Strongylocentrotus purpuratus
Larva
Gastrula
Ectoderm
antibodies

ASJC Scopus subject areas

  • Genetics
  • Embryology
  • Developmental Biology
  • Ecology, Evolution, Behavior and Systematics
  • Agricultural and Biological Sciences (miscellaneous)
  • Genetics(clinical)
  • Agricultural and Biological Sciences(all)

Cite this

Divergent patterns of neural development in larval echinoids and asteroids. / Nakajima, Yoko; Kaneko, Hiroyuki; Murray, Greg; Burke, Robert D.

In: Evolution and Development, Vol. 6, No. 2, 03.2004, p. 95-104.

Research output: Contribution to journalArticle

Nakajima, Yoko ; Kaneko, Hiroyuki ; Murray, Greg ; Burke, Robert D. / Divergent patterns of neural development in larval echinoids and asteroids. In: Evolution and Development. 2004 ; Vol. 6, No. 2. pp. 95-104.
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