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In Vitro and In Vivo Induction of Neutrophil and Eosinophil Chemotactic Responses by Schistosoma japonicum Cercaria
Yoichiro Horii
Yoichiro Horii
Department of Parasitology, Miyazaki Medical College, Miyazaki 889-16, Japan
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Akira Ishii
Akira Ishii
Department of Parasitology, Miyazaki Medical College, Miyazaki 889-16, Japan
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Makoto Owhashi
Makoto Owhashi
Department of Parasitology, Miyazaki Medical College, Miyazaki 889-16, Japan
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High neutrophil and eosinophil chemotactic activities of soluble extract of Schistosoma japonicum cercariae (SjCe-ext) were detected in vitro by using blind-well chemotaxis chambers and Millipore filters in a dose-dependent manner. Low doses (total of 0.25 and 2.5 µg) of SjCe-ext induced significant neutrophilic infiltrations in normal and S. japonicum-infected (8 week) guinea pig tissues beginning at 2 hr after the intradermal injection. Eosinophilic responses were observed in the infected animals especially in early phase (2–8 hr post-injection of SjCe-ext). SjCe-ext elicited strong immediate skin reactions (at 30 min) in the infected guinea pigs. Possible roles of these chemotactic activities and hypersensitivity reaction in S. japonicum infection are discussed.
Author Notes
Present address: Yoichiro Horii, Department of Medical Zoology, Nagasaki University School of Medicine, Sakamoto-machi, Nagasaki 852, Japan.
Present address: Akira Ishii, Department of Parasitology, Okayama University Medical School, Shikata-machi, Okayama 700, Japan.
| Past two years | Past Year | Past 30 Days | |
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| Abstract Views | 484 | 192 | 7 |
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