title: Schistosoma mekongi: a prominent neutrophil chemotactic activity of egg antigen with reference to that of Schistosoma japonicum.
abstract: Schistosoma mekongi causes granulomatous lesions around eggs deposited in the liver with neutrophil-rich inflammatory reactions in the early stage of the egg laying. To define the aspects of the typical pathogenesis of S. mekongi infection, we determined the difference between soluble egg antigen (SEA) from S. mekongi and S. japonicum with a focus on chemotactic factors for neutrophils or eosinophils. Mean volume and protein amount of S. mekongi eggs was 71 and 58% of those of Schistosoma japonicum eggs, respectively. Neutrophil chemotactic activity of S. mekongi SEA was about two times higher than that of S. japonicum. In contrast, eosinophil chemotactic activity of S. mekongi SEA was about half of that of S. japonicum SEA. Molecular analysis revealed that S. mekongi SEA contains higher molecular-weight components with a lower level of glycosylation, and this is likely to be related to the intense neutrophil chemotactic activity in comparison with S. japonicum SEA. The prominent chemotactic reactivity for neutrophils is likely to be involved in the typical pathogenesis of mekongi schistosomiasis.
authors.affiliation: Faculty of Integrated Arts and Sciences, Tokushima University, Japan.
authors.forename: Makoto
authors.initials: M
authors.lastname: Owhashi
authors.forename: Jun
authors.initials: J
authors.lastname: Matsumoto
authors.forename: Atsuko
authors.initials: A
authors.lastname: Imase
authors.forename: Masashi
authors.initials: M
authors.lastname: Kirinoki
authors.forename: Viroj
authors.initials: V
authors.lastname: Kitikoon
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Chigusa
authors.forename: Hajime
authors.initials: H
authors.lastname: Matsuda
mesh_terms: D000818:Animals; D000947:Antigens, Helminth / Q000276:immunology*; D015153:Blotting, Western; D002634:Chemotaxis, Leukocyte / Q000276:immunology*; D002846:Chromatography, Affinity; D004591:Electrophoresis, Polyacrylamide Gel; D004804:Eosinophils / Q000276:immunology; D005260:Female; D006099:Granuloma / Q000276:immunology / Q000469:parasitology / Q000473:pathology; D015801:Helminth Proteins / Q000276:immunology*; D008297:Male; D051379:Mice; D009504:Neutrophils / Q000276:immunology*; D011817:Rabbits; D012547:Schistosoma / Q000276:immunology*; D012549:Schistosoma japonicum / Q000276:immunology; D012552:Schistosomiasis / Q000276:immunology / Q000473:pathology
chemical_list: D000947:Antigens, Helminth; D015801:Helminth Proteins; C055560:p40 egg antigen, Schistosoma