Abstract：
:The structure of the covalent adduct formed in vitro between [14C]-acetaminophen ([14C]APAP) and bovine serum albumin (BSA) has been investigated with the aid of new analytical methodology. The APAP-BSA adduct, isolated from mouse liver microsomal incubations to which the radiolabeled drug and BSA had been added, was cleaved using a combination of specific (cyanogen bromide) and non-specific (acid hydrolysis) procedures, following which the mixture of amino acids obtained was derivatized, in aqueous solution, with ethyl chloroformate. The resulting ethoxycarbonyl derivatives were recovered by extraction into ethylacetate, methylated and subjected to profile analysis using both reverse-phase and normal-phase HPLC techniques. In each HPLC step, one major radioactive amino acid adduct was detected and was identified by mass spectrometry as the derivative of 3-cystein-S-yl-4-hydroxyaniline. Based on this finding, and with a knowledge of the behavior under acidic hydrolysis conditions of the 3-cysteinyl conjugate of APAP, it could be concluded that the major APAP-BSA adduct is one in which the drug is bound, via a thioether linkage at the C-3 position, to a sulfhydryl group on the protein. Furthermore, it could be established that this -SH function almost certainly is that associated with the cys-34 residue of BSA.
journal_name
Chem Biol Interactjournal_title
Chemico-biological interactionsauthors
Hoffmann KJ,Streeter AJ,Axworthy DB,Baillie TAdoi
10.1016/s0009-2797(85)80093-4subject
Has Abstractpub_date
1985-02-01 00:00:00pages
155-72issue
1-2eissn
0009-2797issn
1872-7786journal_volume
53pub_type
杂志文章abstract：:Butyrylcholinesterase (BuChE) is found to have a brain distribution pattern that is distinct from that of acetylcholinesterase (AChE). Neurons containing BuChE are particularly located in the amygdala, hippocampal formation and the thalamus, structures involved in the normal functions of cognition and behavior that ty...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/j.cbi.2012.08.009
更新日期：2013-03-25 00:00:00
abstract：:The renin-angiotensin-aldosterone system (RAAS) is a hormonal system that has a critical role in maintaining the normotensive state and electrolyte balance of the organism. The RAAS also has an important influence in the development of various pathophysiological conditions especially those concerning the renal system,...
journal_title：Chemico-biological interactions
pub_type： 杂志文章,评审
doi：10.1016/j.cbi.2020.109145
更新日期：2020-08-01 00:00:00
abstract：:MnFe2O4 nanoparticles (NPs) are commonly produced in some occupational settings and may reach high concentration in activities such as arc-welding or ferroalloy metallurgy. Manganese is an essential cofactor in enzyme activities but it has been demonstrated that long-term exposure to excessive levels can lead to "mang...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/j.cbi.2018.07.020
更新日期：2018-09-25 00:00:00
abstract：:The in vitro effect of aflatoxins M1, B1 and G1 on oxidative phosphorylation by rat liver mitochondria with succinate as substrate has been studied. All these toxins inhibit the electron transport chain at a 1-10-4 M concentration and the site of inhibition is between cytochrome b and cytochrome c or c1. Aflatoxin M1 ...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/0009-2797(75)90106-4
更新日期：1975-02-01 00:00:00
abstract：:Immunomodulation is a process, which alters the immune system of an organism by interfering with its functions. This interference results in either immunostimulation or immunosuppression. An immunomodulator is any substance that helps to regulate the immune system. This "regulation" is a normalization process, so that...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/j.cbi.2008.01.008
更新日期：2008-05-28 00:00:00
abstract：:ATP mediates covalent binding of hydroxymethyl derivatives of aromatic hydrocarbons to DNA. This non-enzymatic reaction has been studied with 6-[14C]hydroxymethylbenzo[alpha]pyrene (]14C]BP-6-CH2OH) and 7-[14C]-hydroxymethylbenz[alpha]anthracene ([14C]BA-7-CH2OH) at 37 degrees C in Tris buffer (pH 7.0). While ADP medi...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/0009-2797(80)90138-6
更新日期：1980-07-01 00:00:00
abstract：:A chromatographic procedure for improved separation of deoxyribonucleosides and methylated deoxyribonucleosides is described. DNA was isolated from liver and small intestine of rats treated with [14C]dimethylnitrosamine ([14C]DMN) or N-[3H]methyl-N-nitrosourea ([3H]MNU), and the purified DNA was hydrolyzed enzymatical...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/0009-2797(77)90123-5
更新日期：1977-02-01 00:00:00
abstract：:Cysteine (Cys) residues are often crucial to the function and structure of proteins. Cys157 and Cys207 in recombinant mouse arsenic (+3 oxidation state) methyltransferase (AS3MT) are shown to be related to enzyme activity and considered to be the catalytic sites. The roles of some conserved Cys residues in the N-termi...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/j.cbi.2008.12.018
更新日期：2009-05-15 00:00:00
abstract：:Since Duchenne muscular dystrophy was attributed to mutations in the dystrophin gene, more than 30 genes have been found to be causally related with muscular dystrophies, about half of them encoding proteins of the dystrophin-glycoprotein complex (DGC). Through laminin-2, the DGC bridges the muscle cytoskeleton and th...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/j.cbi.2012.08.001
更新日期：2013-03-25 00:00:00
abstract：:The inhibitory effects of antihypertensive drugs (dihydropyridine calcium channel blockers, angiotensin II receptor blockers, and angiotensin-converting enzyme inhibitors) on cytochrome P450 2J2 (CYP2J2) activity were examined. Amlodipine, azelnidipine, barnidipine, benidipine, cilnidipine, efonidipine, felodipine, ma...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/j.cbi.2019.04.005
更新日期：2019-06-01 00:00:00
abstract：:The hypoxia-inducible factor-1 (HIF-1) has been known to be correlated to the adaptation and proliferation of tumor cells; therefore HIF-1 has become an important target in the development of anticancer drugs. Dihydrotanshinone I (DHTS) is a phenanthrenequinone compound from Salvia miltiorrhiza Bunge, which has been u...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/j.cbi.2015.08.006
更新日期：2015-10-05 00:00:00
abstract：:Disulfiram is a potent antioxidant that prevented the peroxidation of microsomal phospholipids induced by ADP/Fe3+ at concentrations as low as 1 microM. However, disulfiram had a biphasic action when used to assess the role of lipid peroxidation in the killing of cultured hepatocytes by an acute oxidative stress. At a...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/0009-2797(89)90003-3
更新日期：1989-01-01 00:00:00
abstract：:Exposure to metals and metalloids including arsenic, cadmium, mercury, and nickel has been a worldwide health problem for several decades. The aim of this study was to learn how metal-induced oxidative stress triggers cell proliferation, a process of great significance for cancer. NADPH oxidase (NOX) activity and cell...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/j.cbi.2014.10.034
更新日期：2014-12-05 00:00:00
abstract：:Buttiauxella strain S19-1 is a new marine bacterium, isolated from the Baltic Sea, which can degrade steroids. In this report, a meta-genomic approach was used to isolate estradiol inducible genes from S19-1. SalI-fragments from the chromosomal DNA of S19-1 were ligated into plasmid pKEGFP2 bearing an EGFP gene as the...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/j.cbi.2012.11.018
更新日期：2013-02-25 00:00:00
abstract：:Neutrophils from asymptomatic HIV-infected patients have an increased Nitroblue tetrazolium (NBT) reduction, that is an increased production of oxygen radicals. Plasma from these patients can activate normal neutrophils to an increased NBT-reduction and the neutrophil activating factor thus seems to be mainly plasma b...
journal_title：Chemico-biological interactions
pub_type： 杂志文章,评审
doi：10.1016/0009-2797(94)90034-5
更新日期：1994-06-01 00:00:00
abstract：:Increasing attention is being paid to the possibility of applying chemopreventive agents for the protection of individuals from cancer risk. The beneficial potential of chemoprotective compounds is usually well documented by extensive experimental data. To assure the desired effect, these compounds are frequently conc...
journal_title：Chemico-biological interactions
pub_type： 杂志文章,评审
doi：10.1016/j.cbi.2009.01.003
更新日期：2009-06-15 00:00:00
abstract：:The 2 pH dependent peaks formed in the Soret region by the treatment of reduced hepatic microsomes or purified cytochrome P-448 with ethyl isocyanide do not exhibit identical dependence on ethyl isocyanide concentration. This behavior and other facts regarding double Soret spectra can be explained by a simple expostul...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/0009-2797(78)90051-0
更新日期：1978-02-01 00:00:00
abstract：:The hydroquinone and catechol like metabolites, NCQ344 and NCQ436 respectively, of the antipsychotic remoxipride have recently been demonstrated to induce apoptosis in myeloperoxidase (MPO)-rich human bone marrow progenitor and HL-60 cells [S.M. McGuinness, R. Johansson, J. Lundstrom, D. Ross, Induction of apoptosis b...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/s0009-2797(00)00188-5
更新日期：2000-08-15 00:00:00
abstract：:NADP(H)-dependent cytosolic aldo-keto reductases (AKR) are mostly monomeric enzymes which fold into a typical (α/β)(8)-barrel structure. Substrate specificity and inhibitor selectivity are determined by interaction with residues located in three highly variable loops (A, B, and C). Based on sequence identity, AKR have...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/j.cbi.2011.02.007
更新日期：2011-05-30 00:00:00
abstract：:Ginsenoside Rb1 (GsRb1) is the best constituent of ginseng and although it shows clinical efficacy as an antineoplastic, antioxidative and antirheumatic agent, its oral bioavailability is poor due to its limited solubility. In this study, the solubility of GsRb1 was improved by encapsulating it in polymeric nanocapsul...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/j.cbi.2020.109285
更新日期：2020-12-01 00:00:00
abstract：:The relative toxicities of particulate beryllium phosphate, soluble beryllium sulphate and a beryllium sulphosalicylate complex to a rat liver parencymal derived cell line have been examined in culture. Due to the propensity of beryllium salts to form beryllium phosphate in solution the incubation medium used was free...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/0009-2797(79)90100-5
更新日期：1979-01-01 00:00:00
abstract：:Effects of hepatocarcinogens dimethylnitrosamine (DMN) and diethylnitrosamine (DEN) on the sedimentation pattern of rat liver DNA in alkaline sucrose gradients were studied with regard to time and dose dependency. Both DMN (10 mg/kg body weight) and den (13.4 or 134 mg/kg) induced appreciably decreased DNA sedimentati...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/0009-2797(77)90046-1
更新日期：1977-10-01 00:00:00
abstract：:The interaction of nanoparticles (NPs) with proteins is a topic of high relevance for the medical application of nanomaterials. In the study, a comprehensive investigation was performed for the binding properties of silver nanoparticles (AgNPs) to pepsin. The results indicate that the binding of AgNPs to pepsin may be...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/j.cbi.2018.03.004
更新日期：2018-04-25 00:00:00
abstract：:Methylmercury is a widely distributed environmental toxicant with detrimental effects on the developing and adult nervous system. Due to its accumulation in the food chain, chronic exposure to methylmercury via consumption of fish and sea mammals is still a major concern for human health, especially developmental expo...
journal_title：Chemico-biological interactions
pub_type： 杂志文章,评审
doi：10.1016/j.cbi.2010.04.007
更新日期：2010-11-05 00:00:00
abstract：:Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) catalyzes the oxidative phosphorylation of glyceraldehyde 3-phosphate to 1,3-diphosphoglycerate, one of the precursors for glycolytic ATP biosynthesis. The enzyme contains an active site cysteine thiolate, which is critical for its catalytic function. As part of a conti...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/j.cbi.2005.05.002
更新日期：2005-06-30 00:00:00
abstract：:This study investigated the spectral interactions of hepatic microsomal cytochrome p450 (CYP) enzymes with four symmetrical polychlorinated biphenyls (PCBs): 2,2',4,4'-tetrachlorobiphenyl (PCB 47); 2,2',5,5'-tetrachlorobiphenyl (PCB 52); 2,2',6,6'-tetrachlorobiphenyl (PCB 54); and 3,3',4,4'-tetrachlorobiphenyl (PCB 77...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/j.cbi.2003.09.003
更新日期：2003-12-15 00:00:00
abstract：:Adverse drug reactions (ADRs) remain a major complication of drug therapy and can be classified as 'on-target' or 'off-target' (idiosyncratic) reactions. On-target reactions can be predicted from the known primary or secondary pharmacology of the drug and often represent an exaggeration of the pharmacological effect o...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/j.cbi.2010.09.011
更新日期：2011-06-30 00:00:00
abstract：:Except for their extra- and intra-cellular interfaces, cell membranes are hydrophobic and inhibit the transport of hydrophilic molecules. Metalloids in aqueous solutions form chemical species with oxygen and hydroxyl groups and, therefore, exist as hydrophilic neutral polar solutes or as hydrophilic anions. This chara...
journal_title：Chemico-biological interactions
pub_type： 杂志文章,评审
doi：10.1016/j.cbi.2012.02.001
更新日期：2012-04-15 00:00:00
abstract：:Resveratrol, a polyphenol, found in skin of red grapes, peanuts and berries possesses anti-inflammatory, anti-carcinogenic and lipid modulation properties. Here, we demonstrate in vivo antifibrotic activity of resveratrol in a mammalian model, wherein hepatic fibrosis was induced by N'-nitrosodimethylamine (NDMA) admi...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/j.cbi.2014.07.007
更新日期：2014-09-25 00:00:00
abstract：:The mechanism of mitochondrial dysfunction and toxicity induced by the tropolones, beta-thujaplicin (4-isopropyl tropolone), tropolone and tropone, has been studied in freshly isolated rat hepatocytes. Incubation of hepatocytes with beta-thujaplicin (1-4 mM) elicited a concentration and time-dependent cell killing. Th...
journal_title：Chemico-biological interactions
pub_type： 杂志文章
doi：10.1016/s0009-2797(98)00078-7
更新日期：1998-11-06 00:00:00
