TY - JOUR
T1 - Three-dimensional anatomy of the Ciona intestinalis tailbud embryo at single-cell resolution
AU - Nakamura, Mitsuru J.
AU - Terai, Jun
AU - Okubo, Reiko
AU - Hotta, Kohji
AU - Oka, Kotaro
N1 - Funding Information:
We thank National Bio-Resource Project, MEXT, and Onagawa Fisheries Laboratory of Tohoku University, Japan for providing Ciona samples. We thank D. Dauga and F. Robin for their kind instruction on how to construct the 3DVMTE. We thank M. Shirae-Kurabayashi for her critical comments on germline cells and for giving us the Ci-VH antibody. We thank W. Koizumi for his help on counting cell numbers in 3DVMTEs. This study was supported by a Grant-in-Aid for Sci. Res. on Innovative Areas, MEXT ( 24112522 ). K. H. was supported by a Grant-in-Aid for Young Scientists (B) in JST and NIG Cooperative Research Program ( 2011–A67 ).
PY - 2012/12/15
Y1 - 2012/12/15
N2 - During embryogenesis, chordates pass through a tailbud stage in which the larval tail is formed. Since acquisition of a tadpole-like tail during tailbud stage is one of the key events in the evolution of chordates, understanding the anatomy of the tailbud stage chordate embryo is of special interest. In this study, to understand comprehensively the anatomy of the tailbud embryo at single-cell-level, real microscopic image stacks of the tailbud embryo in Ciona intestinalis were reconstructed into a 3D computer model. This comprehensive 3D model of the ascidian tailbud embryo was based on real images of confocal laser scanning microscope (CLSM) and therefore, cell shape, location and cell arrangement reflect real geometries of the tailbud embryo. We found that the tailbud embryo consists of 1579 cells, including 836 epidermal cells, 228 cells in the central nervous system, 218 mesenchymal cells, four trunk ventral cells, two B/B*8.11 cells, 36 muscle cells, 40 notochord cells, four primordial germ cells, and 199 endodermal cells. Moreover, we identified for the first time two populations of previously undefined cells (a total of 12 cells) in Ciona: one located in the lateral trunk and the other located under the tail dorsal epidermis. This information provides a first step for understanding how the body plan of the chordate tailbud embryo formed and evolved.
AB - During embryogenesis, chordates pass through a tailbud stage in which the larval tail is formed. Since acquisition of a tadpole-like tail during tailbud stage is one of the key events in the evolution of chordates, understanding the anatomy of the tailbud stage chordate embryo is of special interest. In this study, to understand comprehensively the anatomy of the tailbud embryo at single-cell-level, real microscopic image stacks of the tailbud embryo in Ciona intestinalis were reconstructed into a 3D computer model. This comprehensive 3D model of the ascidian tailbud embryo was based on real images of confocal laser scanning microscope (CLSM) and therefore, cell shape, location and cell arrangement reflect real geometries of the tailbud embryo. We found that the tailbud embryo consists of 1579 cells, including 836 epidermal cells, 228 cells in the central nervous system, 218 mesenchymal cells, four trunk ventral cells, two B/B*8.11 cells, 36 muscle cells, 40 notochord cells, four primordial germ cells, and 199 endodermal cells. Moreover, we identified for the first time two populations of previously undefined cells (a total of 12 cells) in Ciona: one located in the lateral trunk and the other located under the tail dorsal epidermis. This information provides a first step for understanding how the body plan of the chordate tailbud embryo formed and evolved.
KW - Anatomy
KW - Cell lineage
KW - Chordate evolution
KW - Interactive 3D visualization
KW - Segmentation
KW - Tunicate
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U2 - 10.1016/j.ydbio.2012.09.007
DO - 10.1016/j.ydbio.2012.09.007
M3 - Article
C2 - 23022659
AN - SCOPUS:84868300161
VL - 372
SP - 274
EP - 284
JO - Developmental Biology
JF - Developmental Biology
SN - 0012-1606
IS - 2
ER -