Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Persistent inhibition of human natural killer cell function by ziram and pentachlorophenol
10.1002/tox.20127.abs
Ziram is a currently used agricultural fungicide. It is also used as an additive in the production of latex gloves. Because of these uses, there is a potential for human exposure to this compound. Pentachlorophenol (PCP) has been used as an insecticide, fungicide, disinfectant, and ingredient in antifouling paints. Currently, it is used as a wood preservative for power‐line poles and fence posts. Measurable levels of PCP have been detected in human blood and urine. In previous studies we demonstrated that both these compounds could cause very significant inhibition of the tumor‐killing function of human natural killer (NK) cells. NK lymphocytes play a central role in immune defense against viral infection and the formation of primary tumors. So interference with their function could increase the risk of tumor development. In the present study we examined the effects of exposure to ziram or PCP of brief duration (1 h) on the ability of NK cells to destroy tumor cells. NK cells were exposed to either ziram (5–0.5 μM) or PCP (10–5 μM) for 1 h followed by 0 h, 24 h, 48 h, or 6 days in compound‐free media and then were tested for the ability to lyse as well as to bind tumor cells. A 1‐h exposure to as little as 2.5 μM ziram decreased the ability of NK cells to lyse target tumor cells, which persisted up to 6 days following exposure. The loss of lytic function for from 24 h to 6 days following exposure was accompanied by a comparable loss of NK capacity to bind tumor cells. Exposure to 10 μM PCP for 1 h caused a progressive loss (greater than 80%) of lytic function within 6 days of exposure. In contrast to ziram, PCP exposure caused no accompanying loss of binding function. © 2005 Wiley Periodicals, Inc. Environ Toxicol 20: 418–424, 2005.
Persistent inhibition of human natural killer cell function by ziram and pentachlorophenol
10.1002/tox.20127.abs
Ziram is a currently used agricultural fungicide. It is also used as an additive in the production of latex gloves. Because of these uses, there is a potential for human exposure to this compound. Pentachlorophenol (PCP) has been used as an insecticide, fungicide, disinfectant, and ingredient in antifouling paints. Currently, it is used as a wood preservative for power‐line poles and fence posts. Measurable levels of PCP have been detected in human blood and urine. In previous studies we demonstrated that both these compounds could cause very significant inhibition of the tumor‐killing function of human natural killer (NK) cells. NK lymphocytes play a central role in immune defense against viral infection and the formation of primary tumors. So interference with their function could increase the risk of tumor development. In the present study we examined the effects of exposure to ziram or PCP of brief duration (1 h) on the ability of NK cells to destroy tumor cells. NK cells were exposed to either ziram (5–0.5 μM) or PCP (10–5 μM) for 1 h followed by 0 h, 24 h, 48 h, or 6 days in compound‐free media and then were tested for the ability to lyse as well as to bind tumor cells. A 1‐h exposure to as little as 2.5 μM ziram decreased the ability of NK cells to lyse target tumor cells, which persisted up to 6 days following exposure. The loss of lytic function for from 24 h to 6 days following exposure was accompanied by a comparable loss of NK capacity to bind tumor cells. Exposure to 10 μM PCP for 1 h caused a progressive loss (greater than 80%) of lytic function within 6 days of exposure. In contrast to ziram, PCP exposure caused no accompanying loss of binding function. © 2005 Wiley Periodicals, Inc. Environ Toxicol 20: 418–424, 2005.
Persistent inhibition of human natural killer cell function by ziram and pentachlorophenol
Taylor, Thyneice R. (Autor:in) / Tucker, Telpriore (Autor:in) / Whalen, Margaret M. (Autor:in)
Environmental Toxicology ; 20 ; 418-424
01.08.2005
7 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Persistent inhibition of human natural killer cell function by ziram and pentachlorophenol
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