Phagocyte-mediated killing of Candida tropicalis
Human peripheral monocytes (MO), neutrophils (PMN), and lymphocytes (PBL) were tested for their ability to kill Candida tropicalis. With incubation times between 30 min and 2 h, unstimulated MO and PMN, but not PBL, were efficient killers of C. tropicalis. Both leukocyte subsets were able to kill at...
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| Published in: | Mycopathologia (1975) Vol. 113; no. 2; p. 81 |
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| Main Authors: | , |
| Format: | Journal Article |
| Language: | English |
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Netherlands
01.02.1991
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| ISSN: | 0301-486X |
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| Abstract | Human peripheral monocytes (MO), neutrophils (PMN), and lymphocytes (PBL) were tested for their ability to kill Candida tropicalis. With incubation times between 30 min and 2 h, unstimulated MO and PMN, but not PBL, were efficient killers of C. tropicalis. Both leukocyte subsets were able to kill at minimum 2.5:1 effector to target ratios. Pre-incubation of MO for 24 h with interferon-gamma or tumor necrosis factor (TNF) increased their ability to kill yeast targets. TNF alone had no effect on C. tropicalis targets at concentrations up to 1000 U/ml. PBL activated for 4 d with interleukin-2 did not kill yeast targets. PMN exhibited more cytocidal efficiency per cell than MO in these assays. Direct contact of effectors and targets was required; no significant killing by PMN or MO supernatants was measured. PMN-mediated killing, but not MO killing, was inhibited by a mixture of catalase and superoxide dismutase suggesting that oxygen-dependent killing mechanisms were partially responsible for candidacidal activity. |
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| AbstractList | Human peripheral monocytes (MO), neutrophils (PMN), and lymphocytes (PBL) were tested for their ability to kill Candida tropicalis. With incubation times between 30 min and 2 h, unstimulated MO and PMN, but not PBL, were efficient killers of C. tropicalis. Both leukocyte subsets were able to kill at minimum 2.5:1 effector to target ratios. Pre-incubation of MO for 24 h with interferon-gamma or tumor necrosis factor (TNF) increased their ability to kill yeast targets. TNF alone had no effect on C. tropicalis targets at concentrations up to 1000 U/ml. PBL activated for 4 d with interleukin-2 did not kill yeast targets. PMN exhibited more cytocidal efficiency per cell than MO in these assays. Direct contact of effectors and targets was required; no significant killing by PMN or MO supernatants was measured. PMN-mediated killing, but not MO killing, was inhibited by a mixture of catalase and superoxide dismutase suggesting that oxygen-dependent killing mechanisms were partially responsible for candidacidal activity.Human peripheral monocytes (MO), neutrophils (PMN), and lymphocytes (PBL) were tested for their ability to kill Candida tropicalis. With incubation times between 30 min and 2 h, unstimulated MO and PMN, but not PBL, were efficient killers of C. tropicalis. Both leukocyte subsets were able to kill at minimum 2.5:1 effector to target ratios. Pre-incubation of MO for 24 h with interferon-gamma or tumor necrosis factor (TNF) increased their ability to kill yeast targets. TNF alone had no effect on C. tropicalis targets at concentrations up to 1000 U/ml. PBL activated for 4 d with interleukin-2 did not kill yeast targets. PMN exhibited more cytocidal efficiency per cell than MO in these assays. Direct contact of effectors and targets was required; no significant killing by PMN or MO supernatants was measured. PMN-mediated killing, but not MO killing, was inhibited by a mixture of catalase and superoxide dismutase suggesting that oxygen-dependent killing mechanisms were partially responsible for candidacidal activity. Human peripheral monocytes (MO), neutrophils (PMN), and lymphocytes (PBL) were tested for their ability to kill Candida tropicalis. With incubation times between 30 min and 2 h, unstimulated MO and PMN, but not PBL, were efficient killers of C. tropicalis. Both leukocyte subsets were able to kill at minimum 2.5:1 effector to target ratios. Pre-incubation of MO for 24 h with interferon-gamma or tumor necrosis factor (TNF) increased their ability to kill yeast targets. TNF alone had no effect on C. tropicalis targets at concentrations up to 1000 U/ml. PBL activated for 4 d with interleukin-2 did not kill yeast targets. PMN exhibited more cytocidal efficiency per cell than MO in these assays. Direct contact of effectors and targets was required; no significant killing by PMN or MO supernatants was measured. PMN-mediated killing, but not MO killing, was inhibited by a mixture of catalase and superoxide dismutase suggesting that oxygen-dependent killing mechanisms were partially responsible for candidacidal activity. |
| Author | Lindemann, R A Franker, C K |
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| Snippet | Human peripheral monocytes (MO), neutrophils (PMN), and lymphocytes (PBL) were tested for their ability to kill Candida tropicalis. With incubation times... |
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| SubjectTerms | Candida - immunology Catalase - pharmacology Cells, Cultured Humans Interferon-gamma - pharmacology Interleukin-2 - pharmacology Kinetics Lymphocytes - immunology Monocytes - immunology Neutrophils - immunology Phagocytosis Superoxide Dismutase - pharmacology Tumor Necrosis Factor-alpha - pharmacology |
| Title | Phagocyte-mediated killing of Candida tropicalis |
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