NDLI: Scleractinian coral cell proliferation is reduced in primary culture of suspended multicellular aggregates compared to polyps

Content Provider	Springer Nature Link
Author	Lecointe, A. Cohen, S. Gèze, M. Djediat, C. Meibom, A. Domart Coulon, I.
Copyright Year	2013
Abstract	Cell cultures from reef-building scleractinian corals are being developed to study the response of these ecologically important organisms to environmental stress and diseases. Despite the importance of cell division to support propagation, cell proliferation in polyps and in vitro is under-investigated. In this study, suspended multicellular aggregates (tissue balls) were obtained after collagenase dissociation of Pocillopora damicornis coral, with varying yields between enzyme types and brands. Ultrastructure and cell type distribution were characterized in the tissue balls (TBs) compared to the polyp. Morphological evidence of cellular metabolic activity in their ciliated cortex and autophagy in their central mass suggests involvement of active tissue reorganization processes. DNA synthesis was evaluated in the forming multicellular aggregates and in the four cell layers of the polyp, using BrdU labeling of nuclei over a 24 h period. The distribution of BrdU-labeled coral cells was spatially heterogeneous and their proportion was very low in tissue balls (0.2 ± 0.1 %), indicating that suspended multicellular aggregate formation does not involve significant cell division. In polyps, DNA synthesis was significantly lower in the calicoderm (<1 %) compared to both oral and aboral gastroderm (about 10 %) and to the pseudostratified oral epithelium (15–25 % at tip of tentacle). DNA synthesis in the endosymbiotic dinoflagellates dropped in the forming tissue balls (2.7 ± 1.2 %) compared to the polyp (14 ± 3.4 %) where it was not different from the host gastroderm (10.3 ± 1.2 %). A transient (24 h) increase was observed in the cell-specific density of dinoflagellates in individually dissociated coral cell cultures. These results suggest disruption of coral cell proliferation processes upon establishment in primary culture.
Starting Page	705
Ending Page	724
Page Count	20
File Format	PDF
ISSN	09209069
Journal	Cytotechnology
Volume Number	65
Issue Number	5
e-ISSN	15730778
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-06-12
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	culture DNA synthesis BrdU Coral Scleractinia Dinoflagellate Cell proliferation Biotechnology Biomedicine general Biochemistry
Content Type	Text
Resource Type	Article
Subject	Cell Biology Clinical Biochemistry Bioengineering Biomedical Engineering Biotechnology

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