ArticleDrug and alcohol dependence2012
An LC-MS/MS method for concurrent determination of nicotine metabolites and the role of CYP2A6 in nicotine metabolite-mediated oxidative stress in SVGA astrocytes.
Article in Drug and alcohol dependence, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
25 citing papers in PubMed, 37 citations in OpenAlex.
- Reorganization of Mitochondrial Function and Architecture in Response to Plant-Derived Alkaloids: Anatabine, Anabasine, and Nicotine, Investigated in SH-SY5Y Cells and in a Cellular Model of Parkinson's Disease.CNS neuroscience & therapeutics · 2025Article
- Dehydrocostus Lactone Inhibits Microglia-Mediated Neuroinflammation by Targeting CYP2A6 to Improve Ischemic Brain Injury.CNS neuroscience & therapeutics · 2025Article
- Cigarette smoking and alcohol-related liver disease.Liver research (Beijing, China) · 2024Review
- CYP2A6 associates with respiratory disease risk and younger age of diagnosis: a phenome-wide association Mendelian Randomization study.Human molecular genetics · 2024Article
- Impact of Adolescent Nicotine Exposure in Pre- and Post-natal Oxycodone Exposed Offspring.Journal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology · 2023Article
- Brain Energy Metabolism in Ischemic Stroke: Effects of Smoking and Diabetes.International journal of molecular sciences · 2022Review
- Effect of benzo(a)pyrene on oxidative stress and inflammatory mediators in astrocytes and HIV-infected macrophages.PloS one · 2022Article
- Nicotine self-administration with menthol and audiovisual cue facilitates differential packaging of CYP2A6 and cytokines/chemokines in rat plasma extracellular vesicles.Scientific reports · 2021Article
- Article
- Circulating Extracellular Vesicles Containing Xenobiotic Metabolizing CYP Enzymes and Their Potential Roles in Extrahepatic Cells Via Cell-Cell Interactions.International journal of molecular sciences · 2019Review
- Mitochondria as a possible target for nicotine action.Journal of bioenergetics and biomembranes · 2019Review
- Nicotine enhances alcoholic fatty liver in mice: Role of CYP2A5.Archives of biochemistry and biophysics · 2018Article
- Monocyte-derived exosomes upon exposure to cigarette smoke condensate alter their characteristics and show protective effect against cytotoxicity and HIV-1 replication.Scientific reports · 2017Article
- Chronic Effects of Ethanol and/or Darunavir/Ritonavir on U937 Monocytic Cells: Regulation of Cytochrome P450 and Antioxidant Enzymes, Oxidative Stress, and Cytotoxicity.Alcoholism, clinical and experimental research · 2016Article
- Effects of Cigarette Smoke Condensate on Oxidative Stress, Apoptotic Cell Death, and HIV Replication in Human Monocytic Cells.PloS one · 2016Article
- Potential contributions of the tobacco nicotine-derived nitrosamine ketone (NNK) in the pathogenesis of steatohepatitis in a chronic plus binge rat model of alcoholic liver disease.Alcohol and alcoholism (Oxford, Oxfordshire) · 2015Article
- Polycyclic aromatic hydrocarbons and cytochrome P450 in HIV pathogenesis.Frontiers in microbiology · 2015Review
- Effect of mild-to-moderate smoking on viral load, cytokines, oxidative stress, and cytochrome P450 enzymes in HIV-infected individuals.PloS one · 2015Article
- Enhanced nicotine metabolism in HIV-1-positive smokers compared with HIV-negative smokers: simultaneous determination of nicotine and its four metabolites in their plasma using a simple and sensitive electrospray ionization liquid chromatography-tandem mass spectrometry technique.Drug metabolism and disposition: the biological fate of chemicals · 2014Article
- RNA Viruses: ROS-Mediated Cell Death.International journal of cell biology · 2014Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 1 institution in 1 country.
Funding
Abstract
backgroundNicotine is known to generate oxidative stress through cytochrome P450 2A6 (CYP2A6)-mediated metabolism in the liver and other organs, including macrophages. This study has been designed to examine the role of CYP2A6 in nicotine metabolism and oxidative stress in SVGA cells, an immortalized human astrocyte cell line.
methodsSVGA astrocytes were treated with 1 μM nicotine, followed by determination of mRNA and protein levels of several CYPs using quantitative RT-PCR and western blot analyses, respectively. Quantitation of nicotine and the nicotine metabolites, cotinine and nicotine-derived nitrosamine ketones (NNK), was performed using an LC-MS/MS method. The generation of reactive oxygen species (ROS) was measured using flow cytometry.
resultsNicotine significantly upregulated mRNA and protein expression of the most abundantly expressed CYPs in SVGA astrocytes, CYP2A6 and CYP1A1. To characterize the metabolism of nicotine in astrocytes, a highly sensitive LC-MS/MS method was developed which is capable of quantifying very low concentrations of nicotine (0.3 ng/mL), cotinine and NNK (0.11 ng/mL). The LC-MS/MS results showed that nicotine is steadily metabolized to cotinine and NNK from 0.5 to 4h. Finally, we showed that nicotine initially causes an increase in ROS formation which is then gradually decreased, perhaps due to the increase in superoxide dismutase level. Nicotine metabolism and ROS formation by CYP2A6 were further confirmed by using tryptamine, a selective inhibitor of CYP2A6, which significantly lowered the levels of cotinine and NNK and inhibited ROS formation.
conclusionsCYP2A6 plays a key role in nicotine metabolism and oxidative stress in astrocytes, and this has implications in nicotine-associated brain toxicity.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.