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6 resultats
Kinetics of nornicotine and anabasine nitrosation in relation to N'-nitrosonornicotine occurrence in tobacco and to tobacco-induced cancer.
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The kinetics of nornicotine and anabasine nitrosation, studied in aqueous solution, obeyed equations typical for the nitrosation of aliphatic secondary amines, with third-order stoichiometric rate constants of 1.15 (nornicotine) and 0.86 (anabasine) M-2 sec-1. The similarity of the two rate
Cytotoxic effects of cigarette smoke alkaloids inhibit the progesterone production and cell growth of cultured MA-10 Leydig tumor cells.
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Inhibition of corpus luteum progesterone synthesis by cigarette smoke alkaloids might, in part, explain the generally poorer outcome of pregnancy in smoking women. The present experiments evaluate the effects of cigarette smoke alkaloids on progesterone biosynthesis and cell growth. Studies were
Tobacco alkaloid derivatives as inhibitors of breast cancer aromatase.
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The inhibition of estrogen biosynthesis by the use of aromatase inhibitors is emerging as a valuable approach to breast cancer therapy. Because smoking has a profound effect on estrogen-related processes we examined the ability of tobacco constituents to suppress estrogen production by breast cancer
Evidence for endogenous formation of tobacco-specific nitrosamines in rats treated with tobacco alkaloids and sodium nitrite.
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Carcinogenic tobacco-specific nitrosamines are present in tobacco products and are believed to play a significant role in human cancers associated with tobacco use. Additional amounts of tobacco-specific nitrosamines could be formed endogenously. We tested this hypothesis by treating rats with
Levels of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) in raw wastewater as an innovative perspective for investigating population-wide exposure to third-hand smoke.
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Tobacco smoking is the major cause of many chronic diseases, especially lung cancer. Knowledge about population-wide tobacco use and exposure is essential to characterise its burden on public health and evaluate policy efficacy. Obtaining such knowledge remains challenging with current methods
Inhibition of herpes simplex virus replication and protein synthesis by non-smoked tobacco, tobacco alkaloids and nitrosamines.
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Inhibitory effects of snuff extract and the tobacco chemicals nicotine, anabasine, diethyl-N-nitrosamine (DEN), and the tobacco-specific nitrosamines (TSNA), N-nitrosonornicotine (NNN) and 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) on herpes simplex virus type 1 (HSV-1) replication in
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