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Title: IgE deposition in brain microvessels and on parasitized erythrocytes from cerebral malaria patients
Authors: Yoshimasa Maeno
Peter Perlmann
Hedvig Perlmann
Yasuhiro Kusuhara
Koki Taniguchi
Toshio Nakabayashi
Kyaw Win
Sornchai Looareesuwan
Masamichi Aikawa
Tokai University
Fujita Health University School of Medicine
Mahidol University
Department of Molecular Biosciences, The Wenner-Gren Institute
Embassy of the Union of Myanmar
Fujita Health University
Keywords: Immunology and Microbiology;Medicine
Issue Date: 1-Jan-2000
Citation: American Journal of Tropical Medicine and Hygiene. Vol.63, No.3-4 (2000), 128-132
Abstract: Postmortem brain tissues of 21 cerebral malaria cases were obtained in Myanmar and Vietnam. The tissues were examined Dy light microscopy and by an immunohistochemical method. Brain microvessels (capillaries and venules) were examined for the presence of immunoglobulins IgE and IgG, Plasmodium falciparum antigen, and parasitized erythrocytes (PRBC). Deposition of IgE, IgG, and P. falciparum antigen was observed in the microvessels from all specimens examined. Sequestered PRBC in the microvessels were positive for IgG in all 21 cases and for IgE in six cases. In the latter cases, the percentage of microvessels with sequestered PRBC was > 50%, with the frequency of IgE-positive cells ranging from 42% to 52%. In contrast, in five cases that were only weakly positive for IgE, the percentage of microvessels with sequestered PRBC was remarkably low (< 1%). These data indicate that the degree of deposition of IgE in microvessels and on PRBC from cerebral malaria patients correlated with that of PRBC sequestration. As IgE-containing immune complexes are known to induce local overproduction of tumor necrosis factor-alpha (TNF-α), a major pathogenic factor in cerebral malaria, IgE may contribute to the pathogenesis of this severe disease.
ISSN: 00029637
Appears in Collections:Scopus 1991-2000

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