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N-071
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Phattharaporn Pakdeechanuan et al.
Plant & cell physiology, 53(12), 2038-2046 (2012-10-05)
Nornicotine is formed from nicotine by nicotine N-demethylase, a CYP82E family monooxygenase, and accumulates to high levels in some tobacco (Nicotiana tabacum) cultivars and many wild Nicotiana species. Nicotiana langsdorffii does not form nornicotine, whereas the closely related species N.
Eleanor I Miller et al.
Journal of analytical toxicology, 35(6), 321-332 (2011-07-12)
The aim of this exploratory study was to develop and validate a liquid chromatography-tandem mass spectrometry (LC-MS-MS) method for the quantification of nicotine, eight nicotine metabolites, and two minor tobacco alkaloids in fortified analyte-free hair and subsequently apply this method
Bin Cai et al.
The Journal of biological chemistry, 287(51), 42804-42811 (2012-10-27)
Nicotine and its N-demethylation product nornicotine are two important alkaloids in Nicotiana tabacum L. (tobacco). Both nicotine and nornicotine have two stereoisomers that differ from each other at 2'-C position on the pyrrolidine ring. (S)-Nicotine is the predominant form in
Allison C Hoffman et al.
Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco, 15(3), 622-632 (2012-09-20)
This review identified published animal studies evaluating the possible abuse potential of acetaldehyde, nornicotine, cotinine, and anabasine based on five commonly used paradigms. These include their effects on midbrain dopamine (DA) levels, drug discrimination and substitution for known drugs of
Lily B Gavilano et al.
Plant & cell physiology, 48(11), 1567-1574 (2007-10-10)
In the species of genus Nicotiana, nicotine to nornicotine conversion is mediated by closely related nicotine N-demethylase (NND) proteins that are encoded by the CYP82E subfamily of cytochrome P450 genes. The diverse number and transcriptional regulation of the NND genes
Saud Bawazeer et al.
Talanta, 88, 408-411 (2012-01-24)
There has been no previous assessment of the level of nicotine exposure in companion animals as a result of passive smoking. A method was developed for the determination of nicotine in dog hair where extraction was carried out by sonication
Andrew P Brogan et al.
Chemical communications (Cambridge, England), (46)(46), 4952-4954 (2008-03-26)
Nornicotine, a native component of tobacco and minor nicotine metabolite, was found to catalyze the chemoselective reduction of alpha,beta-unsaturated aldehydes under homogeneous aqueous conditions.
Carmela M Reichel et al.
Neuropharmacology, 58(8), 1237-1245 (2010-03-23)
The interoceptive stimulus effects of nicotine acquire control over behavior. This observation, among others, suggests that the stimulus effects of nicotine are important in the development and tenacity of tobacco dependence. Despite this importance, there has been little research examining
Bingfang Yue et al.
Methods in molecular biology (Clifton, N.J.), 603, 389-398 (2010-01-16)
We describe a method for the quantitative analysis of nicotine, cotinine, trans-3'-hydroxy cotinine, nornicotine, and anabasine in urine, serum, and plasma using liquid chromatography-tandem mass spectrometry. A mix of deuterium-labeled internal standards (IS) is added to a specimen aliquot. The
Chiu-Yueh Hung et al.
Plant physiology, 161(2), 1049-1060 (2012-12-12)
Methylenetetrahydrofolate reductase (MTHFR) is a key enzyme of the tetrahydrofolate (THF)-mediated one-carbon (C1) metabolic network. This enzyme catalyzes the reduction of 5,10-methylene-THF to 5-methyl-THF. The latter donates its methyl group to homocysteine, forming methionine, which is then used for the
Delphine Calas-List et al.
Neuroscience letters, 518(1), 64-68 (2012-05-15)
The goal of the present study is to examine the agonist action of nornicotine on insect nicotinic acetylcholine receptors. Using patch-clamp techniques on cockroach dorsal unpaired median neurons, we demonstrated that nornicotine induced two distinct ionic currents named types 1
Aleksandar Knezevich et al.
Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco, 15(2), 591-595 (2012-08-28)
We recently reported that certain amounts of the carcinogen N'-nitrosonornicotine (NNN) can be formed endogenously from nicotine and/or nornicotine in some users of oral nicotine replacement therapy products. Although the acidic environment of the stomach creates the most favorable conditions
Teresa R Gray et al.
Clinical chemistry, 54(12), 2018-2027 (2008-10-11)
Meconium analysis is a diagnostically sensitive and objective alternative to maternal self-report for detecting prenatal tobacco exposure. Nicotine and metabolite disposition in meconium is poorly characterized, and correlation of analytes' concentrations with neonatal outcomes is unexplored. Our objectives were to
Xiang Jing Meng et al.
Research in microbiology, 161(7), 626-633 (2010-07-06)
An efficient nicotine-degrading fungus was isolated from tobacco leaves and identified as Aspergillus oryzae 112822 based on morphological characteristics and sequence analysis of 18S rDNA, 5.8S rDNA and the internal transcribed spacer (5.8S-ITS region). When the strain was cultured in
Joseph R Holtman et al.
Pharmacology, biochemistry, and behavior, 94(3), 352-362 (2009-10-06)
Neuronal nicotinic acetylcholinic receptors (nAChR) are promising targets for the development of novel analgesics. Nicotine and other nAChR-agonists produce profound analgesia in rodent models of acute and persistent pain. However, significant side-effects are of concern. Nornicotine (N-desmethyl-nicotine) appears to activate
Wojciech Piekoszewski et al.
Przeglad lekarski, 66(10), 593-597 (2009-01-01)
The assay of biomarkers in biological material is the most popular and reliable method in estimate exposure to tobacco smoke. Nicotine and its metabolites qualify to the most specific biomarkers for tobacco smoke. Currently the most often used are cotinine
François Marclay et al.
Forensic science international, 213(1-3), 73-84 (2011-07-02)
Tobacco consumption is a global epidemic responsible for a vast burden of disease. With pharmacological properties sought-after by consumers and responsible for addiction issues, nicotine is the main reason of this phenomenon. Accordingly, smokeless tobacco products are of growing popularity
Snehal Jadey et al.
The Journal of general physiology, 141(1), 95-104 (2013-01-02)
A primary target for nicotine is the acetylcholine receptor channel (AChR). Some of the ability of nicotine to activate differentially AChR subtypes has been traced to a transmitter-binding site amino acid that is glycine in lower affinity and lysine in
Piotr Tutka et al.
Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco, 10(8), 1385-1390 (2008-08-08)
Smoking during pregnancy remains a major public health concern and is associated with numerous adverse effects. Recently the clearance of nicotine and cotinine was shown to be substantially increased in pregnant women compared with nonpregnant controls. The present study investigated
Stephanie J Marin et al.
Therapeutic drug monitoring, 33(1), 80-85 (2010-12-31)
Umbilical cord tissue was studied as a means of detecting prenatal exposure to nicotine. This was accomplished by comparing the presence and concentration of nicotine as well as nicotine metabolites in both umbilical cord tissue and paired meconium samples with
Jennifer B Treweek et al.
Accounts of chemical research, 42(5), 659-669 (2009-03-12)
Nicotine and methamphetamine are frequently abused in modern society, despite the increasing evidence of their addictive, neuropharmacological, and toxic effects. Tobacco, the most widely abused substance, is the leading cause of preventable death in the United States, killing nearly half
Baizhan Liu et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 865(1-2), 13-17 (2008-03-18)
A fully automated multi-dimensional gas chromatography (MDGC) system with a megabore precolumn and cyclodextrin-based analytical column was developed to analyze the enantiomeric compositions of anatabine, nornicotine and anabasine in commercial tobacco. The enantiomer abundances of anatabine and nornicotine varied among
Ramsey S Lewis et al.
Phytochemistry, 71(17-18), 1988-1998 (2010-10-28)
In most tobacco (Nicotiana tabacum L.) plants, nornicotine is a relatively minor alkaloid, comprising about 2-5% of the total pyridine alkaloid pool in the mature leaf. Changes in gene expression at an unstable locus, however, can give rise to plants
Teresa R Gray et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 863(1), 107-114 (2008-02-05)
There are no analytical methods that simultaneously quantify nicotine, cotinine, trans-3'-hydroxycotinine, nornicotine and norcotinine in human meconium. Such a method could improve identification of in utero tobacco exposure, determine if maternal dose-meconium concentration relationships exist, and whether nicotine meconium concentrations
Dong-Pyo Hong et al.
Biochimica et biophysica acta, 1794(2), 282-290 (2008-11-18)
alpha-synuclein is a small presynaptic protein (14,460 D) that is abundantly distributed in the brain. Although, its function is unknown, the aggregated form of alpha-synuclein is a pathological hallmark of several neurodegenerative diseases, including Parkinson's disease (PD). Epidemiological studies have
Seok-Young Kim et al.
Clinical cancer research : an official journal of the American Association for Cancer Research, 27(15), 4397-4409 (2021-06-05)
Patient-derived organoids (PDO) of lung cancer has been recently introduced, reflecting the genomic landscape of lung cancer. However, clinical relevance of advanced lung adenocarcinoma organoids remains unknown. Here, we examined the ability of PDOs to predict clinical responses to targeted
Myriam V Thoma et al.
PloS one, 13(12), e0209550-e0209550 (2019-01-01)
To evaluate the Revised Sense of Coherence (SOC-R) scale in a large representative German sample. A nationwide household survey involving a total of 2510 face-to-face interviews. In addition to the SOC-R, childhood trauma and maltreatment (CTM), lifetime traumatic events (Childhood
Luís M Magalhães et al.
Talanta, 147, 460-467 (2015-11-26)
Spent coffee grounds (SCGs) are a great source of bioactive compounds with interest to pharmaceutical and cosmetic industries. Phenolics and methylxanthines are the main health related compounds present in SCG samples. Content estimation of these compounds in SCGs is of
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