Biomphalaria glabrata check for this species in other resources - Schistosoma mansoni check for this species in other resources - hemocytes - encapsulating complexes - extra-cellular matrix"/>
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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 98, No. 1, 2003, pp. 135-139
Bioline Code: oc03047
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 98, No. 1, 2003, pp. 135-139

 en Extra-cellular Matrix Changes in Schistosoma mansoni check for this species in other resources -infected Biomphalaria glabrata check for this species in other resources
Claudia Maria da Cunha Borges & Zilton A Andrade

Abstract

Reactivity of snails against parasites exhibits a primitive focal reaction, with encapsulation, phagocytosis and destruction of parasite larvae by macrophage-like cells - the hemocytes. This reaction mimics granulomatous inflammation seen in higher animals. However, different from the latter, little is known about the participation of extra-cellular matrix in such snail defense reactions. Normal and Schistosoma mansoni check for this species in other resources -infected Biomphalaria glabrata check for this species in other resources of different strains were submitted to cytological, histological, ultrastructural and biochemical methods in order to investigate the behavior of extra-cellular tissues at the site of anti-parasite reactions. In spite of the presence of two cell-types in peripheral hemolymph, only one cell-type was present at the sites of tissue reactions. Although pre-existent collagen and elastic fibers and microfibrils sometimes appeared slightly compressed around focal reactions, no evidences of duplication, synthesis or deposition of connective-tissue extra-cellular components were observed within or around the zones of reactive cell accumulations. Thus, tissue reactions against S. mansoni in the snail B. glabrata appeared exclusively dependent on one specific population of hemocytes.

Keywords
Biomphalaria glabrata check for this species in other resources - Schistosoma mansoni check for this species in other resources - hemocytes - encapsulating complexes - extra-cellular matrix

 
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