In Vitro Reactions of Coelomocytes against Sheep Red Blood Cells in the Solitary Ascidian Halocynthia roretzi

@inproceedings{Dansohkawa1995InVR,
  title={In Vitro Reactions of Coelomocytes against Sheep Red Blood Cells in the Solitary Ascidian Halocynthia roretzi},
  author={M. Dan-sohkawa and M. Morimoto and H. Kaneko},
  booktitle={Zoological science},
  year={1995}
}
Abstract Coelomocytes (blood cells) of the solitary ascidian Halocynthia roretzi were placed in culture to which sheep red blood cells (SRBCs) were introduced. Their reactions against SRBCs were observed by phase-contrast, time-lapse video and scanning electron microscopy. Three cell types, the phago-amoebocyte, the vacuolated cell and the fusogenic phagocyte, reacted to the SRBCs by phagocytosis. The vacuolated cell occasionally discharged the material of their vacuoles at the time of or… Expand
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References

SHOWING 1-9 OF 9 REFERENCES
The phagocytes in hemolymph of Halocynthia roretzi and their phagocytic activity
TLDR
The phagocytes in hemolymph of Halocynthia roretzi and their phagocytic activity in vitro were studied by electron microscopy and the identification of phagcytic cells and possible targets were examined in vitro. Expand
Functional and structural characterization of hemocytes of the solitary ascidian, Halocynthia roretzi
TLDR
The results indicate that the various groups of hemocytes of H. roretzi can be distinguished functionally from one another on the basis of cellular responses and the ability to produce defense substances. Expand
Correlative Fine Structural, Behavioral, and Histochemical Analysis of Ascidian Blood Cells
TLDR
Each of two large cells, large basophilic cells and large granular cells, possessed novel granules or vacuoles, whose functions remain to be elucidated, and the possible functions and relationships of these cells among various ascidian species are discussed. Expand
"CONTACT REACTIONS" BETWEEN XENOGENEIC OR ALLOGENEIC COELOMIC CELLS OF SOLITARY ASCIDIANS
Coelomic cells from solitary ascidians exhibit a nonphagocytic cellular reaction when they are mixed in vitro with such cells from different species or another individual of the same species. TheExpand
A comparative study on the fusogenic nature of echinoderm and nonechinoderm phagocytes in vitro
TLDR
The extraordinarily fusogenic nature of echinoderm phagocyte is discussed in relation to the calcareous body wall structure of the echinoderms. Expand
Characterization of Coelomocytes of the Ascidian Halocynthia roretzi Based on Phase-contrast, Time-lapse Video and Scanning Electron Microscopic Observations
TLDR
Seven types and one sub-type of cells were distinguished with respect to their morphology and behavior of the solitary ascidian Halocynthia roretzi and these cell types are discussed in relation to those appearing in the literature. Expand