Abstract:
:Caffeine was found not to bind covalently to liver microsomal proteins from mice, rats and rabbits. Microsomes metabolized caffeine only to a limited extent, the highest rate (about 2% of the substrate concentration) being obtained with rabbit microsomal preparations. The rat liver perfusion technique represents a good model for in vitro caffeine biotransformation studies and therefore for covalent binding experiments. After 2 h perfusion caffeine was extensively metabolized mainly to dimethyl and monomethyl xanthines, a minor pathway to 1,3,7-trimethyluric acid was also seen. However, covalent binding studies using the liver perfusion technique did not reveal any appreciable amount of caffeine metabolites irreversibly bound to either microsomal and total proteins and to DNA.
journal_name
Chem Biol Interactjournal_title
Chemico-biological interactionsauthors
Szczawinska K,Ginelli E,Bartosek I,Gambazza C,Pantarotto Cdoi
10.1016/0009-2797(81)90106-xsubject
Has Abstractpub_date
1981-03-15 00:00:00pages
345-54issue
3eissn
0009-2797issn
1872-7786pii
0009-2797(81)90106-Xjournal_volume
34pub_type
杂志文章abstract:BACKGROUND:The human body is a home to thousands of microbiotas. It is defined as a community of symbiotic, commensal and pathogenic microorganisms that have existed in all exposed sites of the body, which have co-evolved with diet, lifestyle, genetic factors and immune factors. Human microbiotas have been studied for ...
journal_title:Chemico-biological interactions
pub_type: 杂志文章,评审
doi:10.1016/j.cbi.2019.108732
更新日期:2019-09-01 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::The present study was designed to investigate the potential therapeutic effect of trikatu, an herbal compound and its underlying molecular mechanism in rats with adjuvant-induced arthritis (AIA). Our results indicate that trikatu (1000 mg/kg/b.wt. oral) administration suppressed the production of pro-inflammatory cyto...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/j.cbi.2016.09.003
更新日期:2016-10-25 00:00:00
abstract::A single dose of the carcinogen aflatoxin B1 (7 mg/kg body weight) to male Wistar rats significantly enhanced the hepatic activity of protein kinase C in the particulate and nuclear fractions. The particulate fraction showed stimulation at 4 and 7 h, while the nuclear activity was increased at 17 h following administr...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/0009-2797(96)03698-8
更新日期:1996-03-25 00:00:00
abstract::Glucocorticoids therapy is strongly limited since extended glucocorticoids can cause serious side effects, including increased susceptibility to develop the bone disease osteoporosis. Despite its side effects recognized importance to clinicians, seldom is known about how glucocorticoids directly impact bone-forming os...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/j.cbi.2013.11.004
更新日期:2014-01-25 00:00:00
abstract::It has been suggested that the binding of iron(III) by phosvitin involves the phosphoric radicals of phosphorylserine residues, many of which are arranged in rows of several consecutive phosphoamino acids. In this paper we present evident that, unlike free phosphorylserine which does not interact with Fe(III), polypho...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/0009-2797(76)90161-7
更新日期:1976-10-02 00:00:00
abstract::Human populations are exposed to complex environmental mixtures of acrolein, methylvinyl ketone (MVK) and other type-2 alkenes. Many members of this chemical class are electrophiles that possess a common molecular mechanism of toxicity; i.e., protein inactivation via formation of stable cysteine adducts. Therefore, ac...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/j.cbi.2016.06.014
更新日期:2016-07-25 00:00:00
abstract::The metabolism of [3H]benzo[a]pyrene (BP) and (-)-trans-[14C]7,8-dihydroxy-7,8-dihydrobenzo[a]pyrene (BP-7,8-diol) was studied in freshly isolated hepatocytes of the wild benthic fish, brown bullhead (Ictalurus nebulosus). Bullhead hepatocytes incubated with 40 microM [3H]BP for 1 h metabolized BP to water soluble met...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/0009-2797(90)90063-s
更新日期:1990-01-01 00:00:00
abstract::Previously we reported that methylsulphonyl-2,6-dichlorobenzene, 2, 6-(diCl-MeSO(2)-B), was irreversibly bound to the olfactory mucosa of mice and induced necrosis of the Bowman's glands with subsequent neuroepithelial degeneration and detachment. In this study, autoradiography and histopathology were used to determin...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/s0009-2797(00)00187-3
更新日期:2000-10-16 00:00:00
abstract::Cigarette smoke is a major risk factor for human diseases, such as lung cancer and atherosclerosis. The present study was undertaken to investigate the effect of non-fractionated water-soluble cigarette smoke extract (NFWS CSE) on DNA damage and cellular adhesion molecule expression in human umbilical vein endothelial...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/j.cbi.2004.09.014
更新日期:2004-12-07 00:00:00
abstract::Over the last few years, several laboratories have focused their attention on elucidating the molecular events that control the expression and localization of acetylcholinesterase (AChE) in neurons and skeletal muscle cells. In this context, results from a number of studies have clearly shown the important contributio...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/j.cbi.2005.10.004
更新日期:2005-12-15 00:00:00
abstract::The reaction characteristics of chlorothalonil with glyceraldehyde-3-phosphate dehydrogenase (GPDH), from yeast, (EC 1.2.1.12) were studied in vitro. Enzyme inhibition was related to the amount of [14C]chlorothalonil bound to the protein. Kinetics of enzyme inhibition was non-competitive for the substrate glyceraldehy...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/0009-2797(75)90069-1
更新日期:1975-06-01 00:00:00
abstract::The effects of norharman (NH) on the metabolism of dibenzo[a,e]-fluoranthene (DBF) and on its fixation on DNA, RNA and proteins have been studied in vitro by incubation with S-9 and microsomes from rats and mice. NH causes a decrease of the activity of microsome monooxygenases proportionally to its concentration but h...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/0009-2797(81)90169-1
更新日期:1981-10-01 00:00:00
abstract::A detailed subfractionation of the non-pregnant porcine corpus luteum (CL) was performed employing differential centrifugation. Marker enzyme assays (i.e., lactate dehydrogenase for the cytosol, NADPH-cytochrome P450 reductase for the endoplasmatic reticulum, catalase (CAT) for peroxisomes, glutamate dehydrogenase for...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/j.cbi.2003.10.002
更新日期:2004-01-15 00:00:00
abstract::Examination of the high pressure liquid chromatographic profiles of ethyl acetate extractable benzo [a] pyrene (B(a)P)-metabolites from human lung fibroblast and type II epithelial cells after S phase entry indicated that B(a)P-7,8-diol and 9,10-diol species were produced following the oxygenation of B(a)P. These meta...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/0009-2797(85)90009-2
更新日期:1985-12-31 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::The on-going pandemic of COVID-19 wreaked by a viral infection of SARS-CoV-2, has generated a catastrophic plight across the globe. Interestingly, one of the hallmarks of COVID-19 is the so-called 'cytokine storm' due to attack of SARS-Cov-2 in the lungs. Considering, mesenchymal stem cells (MSCs) therapy could contri...
journal_title:Chemico-biological interactions
pub_type: 杂志文章,评审
doi:10.1016/j.cbi.2020.109298
更新日期:2020-12-01 00:00:00
abstract::A study was conducted to test the hypothesis that repeated low level exposures to 1,3-butadiene (BD), approaching the OSHA occupational threshold for this chemical, produce a significant mutagenic response in mice. Female B6C3F1 mice (4-5 weeks of age) were exposed by inhalation for 2 weeks (6 h/day, 5 days/week) to 0...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/s0009-2797(01)00222-8
更新日期:2001-06-01 00:00:00
abstract::Structure-uncoupling activity relationship of seven anthraquinone derivatives were investigated using rat liver mitochondria. Three compounds bearing the free hydroxyl group at the beta-position of their anthraquinone nucleus (1,3,6,8-tetrahydroxyanthraquinone, 1-acetyl-2,4,5,7-tetrahydroxy-9,10-anthracenedione and sk...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/0009-2797(87)90089-5
更新日期:1987-01-01 00:00:00
abstract::Due to its antiviral effects and its importance for all immunological functions, the administration of selenium is suggested as a supportive measure in early as well as in advanced stages of HIV-induced disease. Initial observations on the effects of selenium supplementation in HIV-infected patients indicate that sele...
journal_title:Chemico-biological interactions
pub_type: 杂志文章,评审
doi:10.1016/0009-2797(94)90040-x
更新日期:1994-06-01 00:00:00
abstract::MAP kinases are important signaling molecules regulating cell survival, proliferation and differentiation, and can be activated by cadmium stress. In this study, we demonstrate that cadmium induces phosphorylation of the yeast cell wall integrity (CWI) pathway_MAP kinase Slt2, and this cadmium-induced CWI activation i...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/j.cbi.2015.09.007
更新日期:2015-10-05 00:00:00
abstract::Treatment of hepatic microsomes with Fe(3+)/ascorbate activates UDP-glucuronyltransferase (UGT), a phenomenon totally prevented and reversed by reducing agents. At microM concentrations, iron and copper ions catalyze the formation of ROS through Fenton and/or Haber-Weiss reactions. Unlike iron ions, indiscriminate bin...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/j.cbi.2006.12.010
更新日期:2007-04-05 00:00:00
abstract::The interactions of benzo(a)pyrene (B(a)P) with the cell surface membrane were studied by measuring B(a)P uptake into intact mammalian cells and by determining B(a)P fluorescence in the presence of isolated cell surface membranes. It was found that 0.19 mu-g B(a)P were taken up by 10-6 Chinese hamster ovary (CHO) cell...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/0009-2797(75)90061-7
更新日期:1975-07-01 00:00:00
abstract::Treatment of rats with two different doses of CCl4 (respectively 2.5 and 0.5 ml/kg body wt. intragastrically) is followed by a rapid increase in the cAMP content of the liver. With 0.5 ml of CCl4, the increase occurs as early as 30 min after poisoning, namely about 4-5 h before the onset of triglyceride accumulation i...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/0009-2797(79)90089-9
更新日期:1979-06-01 00:00:00
abstract::To determine correlations between the biological action pattern and chemical reactivity of alkylating agents, the rate constants for reactions of 1,3-propane sultone and 1,4-butane sultone with a series of nucleophiles at 37 degrees C have been determined. Previously published data on the mutagenicity of the two sulto...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/0009-2797(76)90036-3
更新日期:1976-07-01 00:00:00
abstract::Studies were undertaken to investigate the mechanism of bioactivation and covalent binding of TNT. Incubation of [14C]TNT with rat liver microsomes in the presence of an NADPH generating system resulted in metabolism and covalent binding to microsomal proteins. Time-dependence studies showed that TNT was rapidly reduc...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/0009-2797(94)03606-9
更新日期:1995-06-30 00:00:00
abstract::Women all over the world are exposed to an unavoidable contamination by organochlorine pesticides and other chemical pollutants. Many of them are considered as xenoestrogens and have been associated with the development and progression of breast cancer. We have demonstrated that the most prevalent pesticide mixtures f...
journal_title:Chemico-biological interactions
pub_type: 信件
doi:10.1016/j.cbi.2017.03.001
更新日期:2017-04-25 00:00:00
abstract::The functional genetic polymorphism of aldehyde dehydrogenase 2 (ALDH2) influences the enzymatic activities of its wild type (Glu504 encoded by ALDH2*1) and mutant type (Lys504 encoded by ALDH2*2) proteins. The enzymatic activities of mutant-type ALDH2 are limited compared with those of the wild type. ALDH2 has been s...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/j.cbi.2017.03.012
更新日期:2017-10-01 00:00:00
abstract::Acetylcholinesterase (AChE) terminates cholinergic neurotransmission by hydrolyzing acetylcholine. The collagen-tailed AChE tetramer is a product of 2 genes, ACHE and ColQ. The AChE tetramer consists of 4 identical AChE subunits and one polyproline-rich peptide, whose function is to hold the 4 AChE subunits together. ...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/j.cbi.2020.109007
更新日期:2020-03-01 00:00:00
abstract::In comparison with the fluorescence emission spectra of 7-methylbenz[a]-anthracene-nucleoside adducts, the fluorescence emission spectra of hydrocarbon-deoxyribonucleoside adducts containing a methyl substituent in the "bay region" lack spectral resolution at room temperature and appear at substantially longer wavelen...
journal_title:Chemico-biological interactions
pub_type: 杂志文章
doi:10.1016/0009-2797(79)90150-9
更新日期:1979-09-01 00:00:00