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- W2140672667 abstract "Previous investigations on the effects of cigarette smoke on cultured cells have used mainly smoke condensate dissolved in culture medium. A system has been designed which allows direct exposure of cells to fresh cigarette smoke, without an intervening layer of growth medium between the cells and the smoke. Preliminary results have been obtained which demonstrate the viability of the system. V79 cells were cultured on porous membranes (Transwell; Costar). During smoke exposure only the lower surface of each Transwell is supplied with culture medium from the bottom of the culture chambers. In this way the cells had direct contact with the atmosphere at the upper surface and could be exposed directly to the test compound. The constructed exposure system consists of a smoke generator and an exposure unit containing six Transwells, the latter contained in an incubator. Cigarette smoke was generated using a standard 2 s, 35 ml puff once per min. The puff is diluted with conditioned air from the incubator and injected into the exposure unit. Following exposure of the cells to air only for 3 h there was no effect upon V79 cell viability. However, after exposure to smoke containing between 88 and 224 mg/m3 particulate matter, an inhibition of cell proliferation and induction of micronuclei was measured. When a Cambridge filter pad was placed between the cigarette and the cell exposure system to remove particulate matter cell proliferation was also reduced and an increased frequency of micronuclei above the control value was measured." @default.
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- W2140672667 date "1998-01-01" @default.
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- W2140672667 title "Micronucleus induction in V79 cells after direct exposure to whole cigarette smoke" @default.
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- W2140672667 doi "https://doi.org/10.1093/mutage/13.2.145" @default.
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