Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Cellular aspects of alloimmune reactions in sponges of the genus Axinella I. Axinella polypoides
Buscema, M.; Van de Vyver, G. (1984). Cellular aspects of alloimmune reactions in sponges of the genus Axinella I. Axinella polypoides. J. Exp. Zool. 229(1): 7-17. https://dx.doi.org/10.1002/jez.1402290103
In: The Journal of Experimental Zoology. Wiley Interscience: New York, etc.. ISSN 0022-104X; e-ISSN 1097-010X
|  |
| Trefwoorden |
Axinella polypoides Schmidt, 1862 [WoRMS]
Marien/Kust |
| Auteurs | | Top |
- Buscema, M.
- Van de Vyver, G.
|
|
|
| Abstract |
Allograft rejection in sponges has been repeatedly reported to be associated with cytotoxicity and tissue necrosis. The present work was undertaken in order to investigate the cellular aspects of antagonistic allograft rejection in Axinella polypoides, as part of an extended analysis of sponge immune reactions. Allografts were made by parabiosis of sponge branches, and their reaction was followed using light, transmission, and scanning electron microscopy. Rejection began paradoxically with the strong adherence of the parabionts. After three days, the zone of contact was characterized by extensive archaeocyte invasion, intensive phagocytosis, and cell lysis. Phagocytosis, achieved by the accumulated archaeocytes, involved healthy spherulous cells, and a substantial accumulation of cellular debris resulting from lysis of randomly dispersed single cells, mainly archaeocytes. The reaction lasted seven to nine days, after which cleavage of the reaction zone occurred, resulting in the separation of the parabionts. The reaction appeared to be limited to the former zone of contact, leaving a scar of denuded skeleton network. Our results clearly point out the role of archaeocytes in the rejection processes of Axinella polypoides; they suggest that cell lysis in antagonistic rejection of sponges depends on cytotoxic interactions between archaeocytes, since these cells appear to achieve both cytotoxicity, or killing activity, and phagocytosis. Some aspects of histoincompatibility in sponges and their analogies with those found in vertebrates are discussed. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
