Cells released in vitro from the embryonic yolk sac of the stick insect carausius morosus (BR.) (PHASMATODEA : HETERONEMIIDAE) may include embryonic hemocytes |
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| Affiliation: | 1. Department of Earth Sciences, University of Pisa, via S. Maria 53, 56126 Pisa, Italy;2. Department of Earth Sciences, University of Florence, via La Pira 4, 50121 Firenze, Italy;3. Institute of Geosciences and Earth Resources, Section of Florence, National Research Council (CNR), via La Pira 4, 50121 Florence, Italy;1. Oncological Network, Prevention and Research Institute (ISPRO), Florence, Italy;2. Pulmonary Unit, Cardiothoracic and Vascular Department, University Hospital of Pisa, Pisa, Italy;3. Department of Clinical and Experimental Biomedical Sciences, University of Florence |
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| Abstract: | The embryonic yolk sac and the adult dorsal vessel of the stick insect Carausius morosus (Br.) (Phasmatodea : Heteronemiidae) were shown to release a number of cells that appear morphologically similar to circulating adult hemocytes. Like adult hemocytes, these cells reacted positively when tested for both phenoloxidase activity and a monoclonal antibody specifically raised against a vitellin polypeptide. Based on this evidence, it is suggested that yolk sac-released cells behave as potential embryonic hemocytes. A model is thus proposed whereby the yolk sac might host a number of hemopoietic stem cells on their way to the dorsal vessel, and in so doing, it may temporally act as an embryonic hemopoietic organ. |
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