Methotrexate resistance by gene amplification

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منابع مشابه

Potentiation of carcinogen-induced methotrexate resistance and dihydrofolate reductase gene amplification by inhibitors of poly(adenosine diphosphate-ribose) polymerase.

Poly(ADP-ribosyl)ation of nuclear proteins is an immediate response of most eukaryotic cells to DNA strand breaks, as induced by carcinogen treatment. DNA amplification, on the other hand, can be induced in cell culture systems by chemical or physical carcinogens, too, reaching peak levels a few days after induction treatment. We have previously shown that 3-aminobenzamide, an inhibitor of poly...

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The herbicide glyphosate became widely used in the United States and other parts of the world after the commercialization of glyphosate-resistant crops. These crops have constitutive overexpression of a glyphosate-insensitive form of the herbicide target site gene, 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS). Increased use of glyphosate over multiple years imposes selective genetic pres...

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Resistance of mouse cells to the folate analog, methotrexate, results from selection of increasingly resistant cells on progressive increases of methotrexate in the culture medium. High-level resistance is associated with high rates of synthesis of dihydrofolate reductase and correspondingly high numbers of reductase genes. In some variants high resistance and gene copy number are stable in the...

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ژورنال

عنوان ژورنال: Nature

سال: 1978

ISSN: 0028-0836,1476-4687

DOI: 10.1038/273269a0