The effect of the supernatants obtained fromSporothrix schenkii andCandida albicans culture on the generation of reactive oxygen species by polymorphonuclear leukocytes |
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Authors: | Akira Yoshioka MD Yoshiki Miyachi Sadao Imamura Yukie Niwa |
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Affiliation: | (1) Present address: Department of Dermatology, Faculty of Medicine, Kyoto University, Sakyo-ku, 606 Kyoto, Japan;(2) Niwa Institute for Immunology, 787-03 Tosashimizu, Japan |
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Abstract: | The effect of the supernatants obtained from the liquid culture medium ofSporothrix schenkii andCandida albicans on the generation of superoxide anion (O2– and hydroxyl radicals OH., the elements of reactive oxygen species (ROS), and chemilimunescence (CL), a measure of several ROS, by polymorphonuclear leukocytes (PMNs) was examined. In our study, it was shown that the supernatant ofS. schenkii increased all types of ROS generation examined and CL, while that ofC. albicans increased OH. generation and CL. The effect of the supernatants ofS. schenkii on OH. generation and CL and that ofC. albicans on CL were most remarkable when the supernatant obtained 8 weeks after the inoculation was used. The supernatant ofS. schenkii was shown to be a much more potent stimulant than the supernatant ofC. albicans. This ROS-stimulating effect of the supernatant ofS. schenkii was heat stable but not dialyzable. These findings suggest the possible role of ROS produced by infiltrated PMNs in the inflammatory skin lesions induced byS. schenkii. |
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Keywords: | reactive oxygen species Sporothrix schenkii Candida albicans polymorphonuclear leukocytes chemiluminescence |
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