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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 100, No. 2, 2005, pp. 183-185
Bioline Code: oc05067
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 100, No. 2, 2005, pp. 183-185

 en SHORT COMMUNICATION - Angiogenesis and schistosomal granuloma formation
Ana Paula Baptista & Zilton A Andrade

Abstract

An increasing amount of evidences points to angiogenesis as playing a paramount role in fibrosis development. However, granulomas in general, and periovular schistosomal granulomas in particular, are considered avascular structures, although they usually result in dense areas of focal fibrosis. In order to clarify this apparent paradox, the presence of blood vessels was systematically searched in hepatic schistosomal granulomas of mice, during different stages of the infection, and at different stages of granuloma evolution, by means of vascular injections of colored masses, demonstration of laminin in vascular basement membranes and by ultra structural analysis. Vascular proliferation appeared evident at the early stages of granuloma formation, gradually decreasing thereafter, older granulomas becoming almost avascular structures, sometimes delimited at the periphery by a rich vascular network.

Keywords
Schistosoma mansoni - periovular granuloma - angiogenesis.

 
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