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Kinetics of arylamine N-acetyltransferase in tissues from human breast cancer.
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N-Acetyltransferase activity and Michaelis-Menten kinetic constants were determined in cancerous and non-cancerous breast tissues from 30 female patients with breast cancer. The results derived from tissue cytosol showed that 12 rapid, ten intermediate and eight slow acetylators based on
Arylamine N-acetyltransferase activities in human breast cancer tissues.
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N-Acetyltransferase activities were determined in tumor (12 malignant and 6 benign) and control (non-cancerous) breast tissues from 18 female patients. The activities of matched 12 malignant tumor and control tissue cytosols showed 6 rapid, 4 intermediate and 2 slow acetylators based on
Arylamine N-acetyltransferases: structural and functional implications of polymorphisms.
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Arylamine N-acetyltransferases (NATs) catalyse the N-acetylation of arylamines, arylhydroxylamines and arylhydrazines with the acetyl group being transferred from acetylCoenzyme A. As a result of many recent advances in NAT research there have been many recent reviews and the present paper gives a
4-Aminobiphenyl downregulation of NAT2 acetylator genotype-dependent N- and O-acetylation of aromatic and heterocyclic amine carcinogens in primary mammary epithelial cell cultures from rapid and slow acetylator rats.
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Aromatic and heterocyclic amine carcinogens present in the diet and in cigarette smoke induce breast tumors in rats. N-acetyltransferase 1 (NAT1) and N-acetyltransferase 2 (NAT2) enzymes have important roles in their metabolic activation and deactivation. Human epidemiological studies suggest that
Congenic rats with higher arylamine N-acetyltransferase 2 activity exhibit greater carcinogen-induced mammary tumor susceptibility independent of carcinogen metabolism.
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Recent investigations suggest role(s) of human arylamine N-acetyltransferase 1 (NAT1) in breast cancer. Rat NAT2 is orthologous to human NAT1 and the gene products are functional homologs. We conducted in vivo studies using F344.WKY-Nat2 rapid/slow rats, congenic at rat Nat2 for high (rapid) and low
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