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Human peritoneal macrophage activity is increased by tuftsin
Z Kain1, M Alkan, C Chaimovitz
1Institute of Infectious Diseases, Faculty of Health Sciences, Ben-Gurion University of the Negev, Soroka University Hospital, Beer Sheva, Israel.
Abstract:
Peritonitis caused by Candida albicans is a major complication of continuous ambulatory peritoneal dialysis (CAPD). Increasing the activity of the peritoneal macrophages--the predominant cell type found in the peritoneal cavity--may be of great importance in the prevention and therapy of peritonitis. Therefore, the activating effect of tuftsin was studied on human peritoneal macrophages from CAPD patients. Tuftsin induced a biphasic effect on macrophage activity within a range of 2 X 10(-9)-2 X 10(-6) M, with a maximal activity of 2 X 10(-7) M. At this concentration, tuftsin enhanced by twofold cell association with radiolabelled candida (from 2 +/- 0.2 to 4 +/- 0.2 candida per macrophage) and superoxide anion production in response to exposure to candida (from 150 +/- 20 to 300 +/- 20 nmoles/mg). These results suggest the potential use of tuftsin as a therapeutic drug.
Insights
Tuftsin enhances the activity of human peritoneal macrophages, crucial for fighting Candida albicans peritonitis in continuous ambulatory peritoneal dialysis (CAPD) patients. This finding suggests tuftsin
Area of Science:
- Immunology
- Nephrology
- Microbiology
Background:
- Peritonitis caused by Candida albicans is a serious complication for patients undergoing continuous ambulatory peritoneal dialysis (CAPD).
- Enhancing peritoneal macrophage activity is vital for preventing and treating peritonitis in CAPD patients.
Purpose of the Study:
- To investigate the activating effect of tuftsin on human peritoneal macrophages from CAPD patients.
- To determine the optimal concentration of tuftsin for enhancing macrophage activity.
Main Methods:
- Human peritoneal macrophages were isolated from CAPD patients.
- The effect of varying tuftsin concentrations (2 x 10(-9) to 2 x 10(-6) M) on macrophage activity was assessed.
- Macrophage association with radiolabeled Candida albicans and superoxide anion production were measured.
Main Results:
- Tuftsin exhibited a biphasic effect on macrophage activity, with maximal enhancement at 2 x 10(-7) M.
- At the optimal concentration, tuftsin doubled the association of macrophages with Candida albicans.
- Superoxide anion production in response to Candida albicans exposure was also doubled.
Conclusions:
- Tuftsin effectively enhances the phagocytic and microbicidal activity of human peritoneal macrophages from CAPD patients.
- These findings highlight the potential therapeutic application of tuftsin for managing Candida albicans peritonitis in CAPD.
- Further research into tuftsin as a treatment for peritonitis is warranted.