Document Detail

Phagocytic amoebocyte sub populations in the perivisceral coelom of the sea urchin Lytechinus variegatus (Lamarck, 1816).
MedLine Citation:
PMID:  15726630     Owner:  NLM     Status:  MEDLINE    
The echinoderms are deuterostomic animals with a nonspecific immune system similar to that of vertebrates. Among coelomocytes, phagocytic amoebocytes have a key role in the nonspecific immune response in sea urchin, being responsible for microorganisms elimination through phagocytosis and also for humoral secretions of a wide spectrum. Sub-populations of phagocytic amoebocytes (PA) have been previously described and two distinct sub populations in the oral (OR) and aboral (AB) regions of the perivisceral coelom of L.variegatus in the present study were found. In the OR there is a higher number of PA with higher phagocytic capacity after 30 minutes of incubation with yeast and higher percentage of intranuclear iron crystalloids. The germicide capacity under the fluorescence technique did not show any difference. SDS-PAGE analysis showed different protein patterns between coelomocytes of OR and AB. Gravitational force had no effect in PA distribution and no physical barrier was found in the perivisceral coelom. The other coelomocyte (vibratile cells, red spherulocytes and white spherulocytes) populations were not different in OR compared with AB in their distribution. Some aspects of the possible causes of the differences found for PA are discussed in the paper.
João Carlos Shimada Borges; Bernard Ernesto Jensch-Junior; Paula Amaral Gurgel Garrido; Maria Bárbara Baptista Cepellos Daruiz Mangiaterra; José Roberto Machado Cunha Silva
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of experimental zoology. Part A, Comparative experimental biology     Volume:  303     ISSN:  1548-8969     ISO Abbreviation:  J. Exp. Zoolog. Part A Comp. Exp. Biol.     Publication Date:  2005 Mar 
Date Detail:
Created Date:  2005-02-28     Completed Date:  2005-06-03     Revised Date:  2009-10-05    
Medline Journal Info:
Nlm Unique ID:  101168223     Medline TA:  J Exp Zool A Comp Exp Biol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  241-8     Citation Subset:  IM    
Department of Cell and Developmental Biology, Biomedical Sciences Institute of the University of São Paulo. São Paulo-SP, 05508-900, Brazil.
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MeSH Terms
Digestive System
Electrophoresis, Polyacrylamide Gel
Phagocytes / physiology*
Sea Urchins / immunology*
Yeasts / immunology

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