Haemostatic and immune role of cellular clotting in the sipunculan Themiste petricola
| Autor: | Elida Alvarez, Daniela L. Papademetrio, Victoria Cavaliere, Guillermo A. Blanco |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Cell type
Histology Nematoda DNA Fragmentation Biology Pathology and Forensic Medicine Cell Line Ciencias Biológicas Intrusion Immune system Phagocytosis Yeasts Leukocytes Animals Humans Seawater coagulation sipuncula Cytoskeleton Blood Coagulation Themiste petricola Cell Nucleus microparticles Hemostasis Phagocytes Bacteria Cell Death Cell Biology Biología Marina Limnología biology.organism_classification Flow Cytometry Petricola immunity Cell biology Granular Leukocytes cell death Coagulation Immunology Hemorheology Coelom CIENCIAS NATURALES Y EXACTAS circulatory and respiratory physiology |
| DOI: | 10.1007/s00441-009-0912-9 |
| Popis: | Sipunculans, a small phylum of coelomated marine worms closely related to polychaete annelids, lack a true circulatory system. We have previously shown that the sipunculan Themiste petricola can form a cellular clot, without congealing, of cell-free coelomic fluid. The clot is formed by the aggregation of large granular leukocytes (LGLs) and may serve not only haemostatic but immune functions, since dissimilar particles may become entrapped within it. We have now evaluated the capacity of a massive clot, induced in vitro by sea water contact, to stop coelomic fluid flow. We have further studied smaller clots induced on glass-slides either with or without the presence of bacteria placed for entrapment within the clot. The fate of clotting LGLs is cell death while forming a cohesive mass, although cytoplasmic and nuclear remnants are shed from the clot. These remnants and any bacteria that avoid clot entrapment or are detached from the clot are engulfed by non-clotting cells that include small granular leukocytes (SGLs) and large hyaline amebocytes (LHAs). Both cell types can be found other than in the clot but SGLs also occur around the clot edges heavily loaded with engulfed material. The cytoskeletal arrangement of SGLs evaluated with phalloidin-rhodamine correspond to motile cells and contrast with that of clotting LGLs that form a massive network of F-actin. Thus, the complementary roles between clotting LGLs and non-clotting SGLs and LHAs act a central immune strategy of Themiste petricola to deal with body wall injury and pathogen intrusion into the coelomic cavity. Fil: Cavaliere, Victoria. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Oficina de Coordinacion Administrativa Houssay. Instituto de Estudios de la Inmunidad Humoral "Profesor R. A. Margni"; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica; Argentina Fil: Papademetrio, Daniela Laura. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Oficina de Coordinacion Administrativa Houssay. Instituto de Estudios de la Inmunidad Humoral "Profesor R. A. Margni"; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica; Argentina Fil: Alvarez Carbonetto, Elida M. del C.. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Oficina de Coordinacion Administrativa Houssay. Instituto de Estudios de la Inmunidad Humoral "Profesor R. A. Margni"; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica; Argentina Fil: Blanco, Guillermo Armando C.. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Oficina de Coordinacion Administrativa Houssay. Instituto de Estudios de la Inmunidad Humoral "Profesor R. A. Margni"; Argentina. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica; Argentina |
| Databáze: | OpenAIRE |
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