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- W2187636997 endingPage "L761" @default.
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- W2187636997 abstract "1,3-Bis(2-chloroethyl)-1-nitrosourea (BCNU) is an important cause of pulmonary toxicity. BCNU alkylates DNA at the O(6) position of guanine. O(6)-methylguanine-DNA methyltransferase (MGMT) is a DNA repair protein that removes alkyl groups from the O(6) position of guanine. To determine whether overexpression of MGMT in a lung cell reduces BCNU toxicity, the MGMT gene was transfected into A549 cells, a lung epithelial cell line. Transfected A549 cell populations demonstrated high levels of MGMT RNA, MGMT protein, and DNA repair activity. The overexpression of MGMT in lung epithelial cells provided protection from the cytotoxic effects of BCNU. Control A549 cells incubated with 100 microM BCNU had a cell survival rate of 12.5 +/- 1.2%; however, A549 cells overexpressing MGMT had a survival rate of 71.8 +/- 2.7% (P < 0.001). We also demonstrated successful transfection of MGMT into human pulmonary artery endothelial cells and a primary culture of rat type II alveolar epithelial cells with overexpression of MGMT, resulting in significant protection from BCNU toxicity. These data suggest that overexpression of DNA repair proteins such as MGMT in lung cells may protect the lung cells from cytotoxic effects of cancer chemotherapy drugs such as BCNU." @default.
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- W2187636997 date "2001-04-01" @default.
- W2187636997 modified "2023-10-13" @default.
- W2187636997 title "Reduction of BCNU toxicity to lung cells by high-level expression of<i>O</i><sup>6</sup>-methylguanine-DNA methyltransferase" @default.
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- W2187636997 doi "https://doi.org/10.1152/ajplung.2001.280.4.l755" @default.
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