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Nicotyrine
Nicotryine is lesser known and minor tobacco alkaloid. It inhibits metabolism of nicotine through CYP2A6 Cytochrome P450 2A6 (abbreviated CYP2A6) is a member of the cytochrome P450 mixed-function oxidase system, which is involved in the metabolism of xenobiotics in the body. CYP2A6 is the primary enzyme responsible for the oxidation of nicotine and ... enzyme inhibition (Ki = 7.5 ± 2.9). It also inhibits CYP2A13 (Ki = 5.6 ± 0.86) which might play role in nicotine metabolism. Nicotyrine is formed by gradual oxidation of nicotine in e-liquids and causes delayed nicotine clearance and attenuated withdrawal symptoms. It has insecticidal properties like nicotine and certain derivatives have been synthesized for that property. Chemistry alpha-nicotyrine and beta-nicotyrine are positional isomers of each other. Synthesis Nicotyrine can be produced readily from nicotine by catalytic dehydrogenation and from tobacco biomass by catalytic pyrolysis. See also * Myosmine Refe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tobacco
Tobacco is the common name of several plants in the genus '' Nicotiana'' of the family Solanaceae, and the general term for any product prepared from the cured leaves of these plants. More than 70 species of tobacco are known, but the chief commercial crop is ''N. tabacum''. The more potent variant ''N. rustica'' is also used in some countries. Dried tobacco leaves are mainly used for smoking in cigarettes and cigars, as well as pipes and shishas. They can also be consumed as snuff, chewing tobacco, dipping tobacco, and snus. Tobacco contains the highly addictive stimulant alkaloid nicotine as well as harmala alkaloids. Tobacco use is a cause or risk factor for many deadly diseases, especially those affecting the heart, liver, and lungs, as well as many cancers. In 2008, the World Health Organization named tobacco use as the world's single greatest preventable cause of death. Etymology The English word ''tobacco'' originates from the Spanish word "tabaco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nicotine
Nicotine is a natural product, naturally produced alkaloid in the nightshade family of plants (most predominantly in tobacco and ''Duboisia hopwoodii'') and is widely used recreational drug use, recreationally as a stimulant and anxiolytic. As a pharmaceutical drug, it is used for smoking cessation to relieve drug withdrawal, withdrawal symptoms. Nicotine acts as a receptor agonist at most nicotinic acetylcholine receptors (nAChRs), except at two nicotinic receptor subunits (nAChRα9 and nAChRα10) where it acts as a receptor antagonist. Nicotine constitutes approximately 0.6–3.0% of the dry weight of tobacco. Nicotine is also present at Parts-per notation, ppb-concentrations in edible plants in the family Solanaceae, including potatoes, tomatoes, and eggplants, though sources disagree on whether this has any biological significance to human consumers. It functions as an plant defense against herbivory, antiherbivore toxin; consequently, nicotine was widely used as an insectic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biochemical Pharmacology (journal)
''Biochemical Pharmacology'' is a peer-reviewed medical journal published by Elsevier. It covers research on the pharmacodynamics and pharmacokinetics of drugs and non-therapeutic xenobiotics. The editor-in-chief is S. J. Enna, University of Kansas Medical Center, Kansas City. , accessed on February 11th, 2013 Abstracting and indexing The journal is abstracted and indexed in: According to the '''', the journal received a 2019 |
Toxicology And Applied Pharmacology
''Toxicology and Applied Pharmacology'' is a scientific journal for original research pertaining to action of chemicals, drugs, or natural products to animals or humans. The journal covers mechanistic approaches to physiological, biochemical, cellular, or molecular understanding of toxicologic/pathologic lesions and to methods used to describe these responses. Indexing The journal is included in the Index Medicus and in MEDLINE MEDLINE (Medical Literature Analysis and Retrieval System Online, or MEDLARS Online) is a bibliographic database of life sciences and biomedical information. It includes bibliographic information for articles from academic journals covering medic .... According to the ''Journal Citation Reports'', ''Toxicology and Applied Pharmacology'' has a 2020 impact factor of 4.219, ranking it 29 out of 93 in the category ''Toxicology''. References External links Elsevier {{DEFAULTSORT:Toxicology And Applied Pharmacology Monthly journals Elsevier academi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CYP2A6
Cytochrome P450 2A6 (abbreviated CYP2A6) is a member of the cytochrome P450 mixed-function oxidase system, which is involved in the metabolism of xenobiotics in the body. CYP2A6 is the primary enzyme responsible for the oxidation of nicotine and cotinine. It is also involved in the metabolism of several pharmaceuticals, carcinogens, and a number of coumarin-type alkaloids. CYP2A6 is the only enzyme in the human body that appreciably catalyzes the 7-hydroxylation of coumarin, such that the formation of the product of this reaction, 7-hydroxycoumarin, is used as a probe for CYP2A6 activity. The CYP2A6 gene is part of a large cluster of cytochrome P450 genes from the CYP2A, CYP2B and CYP2F subfamilies on chromosome 19q. The gene was formerly referred to as CYP2A3; however, it has been renamed CYP2A6. Interactive pathway map Distribution CYP2A6 localizes to the endoplasmic reticulum and is found predominantly in the liver. Variability Significant interindividual variability in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemico-Biological Interactions
''Chemico-Biological Interactions'' is a peer-reviewed scientific journal In academic publishing, a scientific journal is a periodical publication intended to further the progress of science, usually by reporting new research. Content Articles in scientific journals are mostly written by active scientists such ... covering toxicological aspects of interactions between chemicals and biological systems. External links * Publications established in 1969 Elsevier academic journals Toxicology journals English-language journals {{sci-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drug Metabolism And Disposition
''Drug Metabolism and Disposition'' is a peer-reviewed scientific journal covering the fields of pharmacology and toxicology. It was established in 1973 and is published monthly by the American Society for Pharmacology and Experimental Therapeutics. The journal publishes articles on ''in vitro'' and ''in vivo'' studies of the metabolism, transport, and disposition of drugs and environmental chemicals, including the expression of drug-metabolizing enzymes and their regulation. , the editor-in-chief is XinXin Ding. All issues are available online as PDFs, with text versions additionally available from 1997. Content from 1997 is available freely 12 months after publication. History ''Drug Metabolism and Disposition'' was established in 1973 by Kenneth C. Leibman. The initial frequency was bimonthly (six annual issues); it increased to monthly in 1995. The journal was published on behalf of the society by Williams & Wilkins until the end of 1996. Abstracting and indexing According t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CYP2A13
Cytochrome P450 2A13 is a protein that in humans is encoded by the ''CYP2A13'' gene. This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. This protein localizes to the endoplasmic reticulum. Although its endogenous substrate has not been determined, it is known to metabolize 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone, a major nitrosamine specific to tobacco Tobacco is the common name of several plants in the genus '' Nicotiana'' of the family Solanaceae, and the general term for any product prepared from the cured leaves of these plants. More than 70 species of tobacco are known, but the .... This gene is part of a large cluster of cytochrome P450 genes from the CYP2A, CYP2B and CYP2F subfamilies on chromosome 19q. References External links * Further reading * * * * * * * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medical Hypotheses
''Medical Hypotheses'' is a not-conventionally-peer reviewed medical journal published by Elsevier. It was originally intended as a forum for unconventional ideas without the traditional filter of scientific peer review, "as long as (the ideas) are coherent and clearly expressed" in order to "foster the diversity and debate upon which the scientific process thrives." The publication of papers on AIDS denialism led to calls to remove it from PubMed, the United States National Library of Medicine online journal database. Following the AIDS papers controversy, Elsevier forced a change in the journal's leadership. In June 2010, Elsevier announced that "submitted manuscripts will be reviewed by the Editor and external reviewers to ensure their scientific merit". According to the ''Journal Citation Reports'', ''Medical Hypotheses'' has a 2020 impact factor of 1.538. Founding and editorship ''Medical Hypotheses'' was founded in 1975 by physiologist David Horrobin, who was the edit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Withdrawal Symptoms
Drug withdrawal, drug withdrawal syndrome, or substance withdrawal syndrome, is the group of symptoms that occur upon the abrupt discontinuation or decrease in the intake of pharmaceutical or recreational drugs. In order for the symptoms of withdrawal to occur, one must have first developed a form of drug dependence. This may occur as physical dependence, psychological dependence or both. Drug dependence develops from consuming one or more substances over a period of time. Dependence arises in a dose-dependent manner and produces withdrawal symptoms that vary with the type of drug that is consumed. For example, prolonged use of an antidepressant medication is likely to cause a rather different reaction when discontinued compared to discontinuation of an opioid, such as heroin. Withdrawal symptoms from opiates include anxiety, sweating, vomiting, and diarrhea. Alcohol withdrawal symptoms include irritability, fatigue, shaking, sweating, and nausea. Withdrawal from nicotine ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insecticidal
Insecticides are substances used to kill insects. They include ovicides and larvicides used against insect eggs and larvae, respectively. Insecticides are used in agriculture, medicine, industry and by consumers. Insecticides are claimed to be a major factor behind the increase in the 20th-century's agricultural productivity. Nearly all insecticides have the potential to significantly alter ecosystems; many are toxic to humans and/or animals; some become concentrated as they spread along the food chain. Insecticides can be classified into two major groups: systemic insecticides, which have residual or long term activity; and contact insecticides, which have no residual activity. The mode of action describes how the pesticide kills or inactivates a pest. It provides another way of classifying insecticides. Mode of action can be important in understanding whether an insecticide will be toxic to unrelated species, such as fish, birds and mammals. Insecticides may be repellen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Positional Isomer
In chemistry, a structural isomer (or constitutional isomer in the IUPAC nomenclature) of a compound is another compound whose molecule has the same number of atoms of each element, but with logically distinct bonds between them. The term metamer was formerly used for the same concept. For example, butanol , methyl propyl ether , and diethyl ether have the same molecular formula but are three distinct structural isomers. The concept applies also to polyatomic ions with the same total charge. A classical example is the cyanate ion and the fulminate ion . It is also extended to ionic compounds, so that (for example) ammonium cyanate and urea are considered structural isomers,William F. Bynum, E. Janet Browne, Roy Porter (2014): ''Dictionary of the History of Science''. 530 pages. and so are methylammonium formate and ammonium acetate . Structural isomerism is the most radical type of isomerism. It is opposed to stereoisomerism, in which the atoms and bonding s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
