ArticleJournal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology2012
A LC-MS/MS method for concurrent determination of nicotine metabolites and role of CYP2A6 in nicotine metabolism in U937 macrophages: implications in oxidative stress in HIV + smokers.
Article in Journal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 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
36 citing papers in PubMed, 55 citations in OpenAlex.
- Cessation of alcohol consumption decreases rate of nicotine metabolism in male alcohol-dependent smokers.Drug and alcohol dependence · 2016Trial
- Luteolin Alleviates Oxidative Stress in Chronic Obstructive Pulmonary Disease Induced by Cigarette Smoke via Modulation of the TRPV1 and CYP2A13/NRF2 Signaling Pathways.International journal of molecular sciences · 2023Article
- Extracellular vesicles released from macrophages modulates interleukin-1β in astrocytic and neuronal cells.Scientific reports · 2023Article
- Nicotine and cotinine quantification after a 4-week inhalation of electronic cigarette vapors in male and female mice using UPLC-MS/MS.Saudi medical journal · 2022Article
- Article
- Biological determinants impact the neurovascular toxicity of nicotine and tobacco smoke: A pharmacokinetic and pharmacodynamics perspective.Neurotoxicology · 2022Review
- Effect of benzo(a)pyrene on oxidative stress and inflammatory mediators in astrocytes and HIV-infected macrophages.PloS one · 2022Article
- Detection of Vascular Inflammation and Oxidative Stress by Cotinine in Smokers: Measured Through Interleukin-6 and Superoxide Dismutase.International journal of general medicine · 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
- Application of text mining to develop AOP-based mucus hypersecretion genesets and confirmation with in vitro and clinical samples.Scientific reports · 2021Review
- Bidirectional Associations among Nicotine and Tobacco Smoke, NeuroHIV, and Antiretroviral Therapy.Journal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology · 2020Review
- Impact of Tobacco Smoke in HIV Progression: a Major Risk Factor for the Development of NeuroAIDS and Associated of CNS Disorders.Zeitschrift fur Gesundheitswissenschaften = Journal of public health · 2020Article
- 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
- Differences in the rate of nicotine metabolism among smokers with and without HIV.AIDS (London, England) · 2019Article
- Benzo(a)pyrene in Cigarette Smoke Enhances HIV-1 Replication through NF-κB Activation via CYP-Mediated Oxidative Stress Pathway.Scientific reports · 2018Article
- In vitro RNA-seq-based toxicogenomics assessment shows reduced biological effect of tobacco heating products when compared to cigarette smoke.Scientific reports · 2018Article
- Tobacco and Antiretrovirals Modulate Transporter, Metabolic Enzyme, and Antioxidant Enzyme Expression and Function in Polarized Macrophages.Current HIV research · 2018Article
- Cytokine profiling of exosomes derived from the plasma of HIV-infected alcohol drinkers and cigarette smokers.PloS one · 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
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 1 institution in 1 country.
Funding
Abstract
Nicotine, the major constituent of tobacco, is predominantly metabolized by liver CYP2A6 into cotinine and many other compounds, including nicotine-derived nitrosamine ketone (NNK), which is known to cause oxidative stress. We have recently shown that CYP2A6 is highly expressed in U937 monocyte-derived macrophages. In this study we investigated the role of CYP2A6 in nicotine metabolism and oxidative stress in U937 macrophages. To study nicotine metabolism, we developed a highly sensitive LC-MS/MS method for simultaneous quantitative determination of nicotine, cotinine, and NNK. The LC-MS/MS analysis was carried out by multiple reaction monitoring mass transitions with m/z of 163.2/130.1, 177.4/98.3, and 208.4/122.1 for nicotine, cotinine, and NNK, respectively. The calibration curves were linear within 3.3-1028.1 ng/ml for nicotine and 0.3-652.6 ng/ml for cotinine and NNK. This novel method was then applied to quantify nicotine metabolites, cotinine and NNK, in nicotine-treated U937 macrophages. Cotinine and NNK initially formed at 30 min, followed by a peak at 2-3 h. The role of CYP2A6 in nicotine metabolism in U937 macrophages was further confirmed by using CYP2A6-selective inhibitor, tryptamine, which significantly decreased cotinine (70%) and completely inhibited NNK formations. Finally, we showed that nicotine-treated macrophages increase the formation of oxidant at 30-60 min, which is consistent with the initial formation of cotinine and NNK. In conclusion, we have developed a new LCMS/MS method for concurrent determination of nicotine metabolites and analyzed the role of CYP2A6 in nicotine metabolism and oxidative stress in U937 macrophages, which may have implications in viral replication among HIV + smokers.
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.