Abstract:
:We report that intracellular calcium levels rise in mammalian neurosecretory terminals and in cultured pheochromocytoma cells during acute exposure to physiological medium incubated in IV drip chambers. The agent responsible for this effect is shown to be di(2-ethylhexyl)phthalate (DEHP). DEHP (800 nM) added to saline solution caused a rise in [Ca(2+)](i) similar to that elicited by the contaminant-containing solution. The extraction of this contaminant from the IV drip chamber, as measured by spectrophotometry, was time-dependent and was markedly accelerated by the presence of 50 mM ethanol in the solution. Larger [Ca(2+)](i) increases were observed in terminals exposed to solutions incubated in IV drip chambers for greater durations. The rise in calcium requires transmembrane calcium flux through membrane channels, as the response is blocked by either 100 microM cadmium or by lowering the extracellular free Ca(2+) concentration to 10 microM. Our results suggest that acute alterations in intracellular calcium should be considered in addition to long-term effects when determining the safety of phthalate-containing plastics and that laboratory researchers using plastic perfusion materials consider this potential source of artifactual results.
journal_name
Toxicol Appl Pharmacoljournal_title
Toxicology and applied pharmacologyauthors
Tully K,Kupfer D,Dopico AM,Treistman SNdoi
10.1006/taap.2000.9036subject
Has Abstractpub_date
2000-11-01 00:00:00pages
183-8issue
3eissn
0041-008Xissn
1096-0333pii
S0041-008X(00)99036-7journal_volume
168pub_type
杂志文章abstract::The ASCT2 transport system catalyses a sodium-dependent antiport of glutamine and other neutral amino acids which is involved in amino acid metabolism. A library of 1,2,3-dithiazoles was designed, synthesized and evaluated as inhibitors of the glutamine/amino acid ASCT2 transporter in the model system of proteoliposom...
journal_title:Toxicology and applied pharmacology
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doi:10.1016/j.taap.2012.09.011
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abstract::Two members of the cytochrome P450 2A subfamily, CYP2A10 and 2A11, are abundant nasal enzymes previously characterized in rabbit olfactory microsomes. Rabbit CYP2A is active toward a number of nasal toxicants, including the rat nasal procarcinogen hexamethylphosphoramide (HMPA). While P450s immunochemically related to...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1006/taap.1996.7975
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abstract::Improvement of COVID-19 clinical condition was seen in studies where combination of antiretroviral drugs, lopinavir and ritonavir, as well as immunomodulant antimalaric, chloroquine/hydroxychloroquine together with the macrolide-type antibiotic, azithromycin, was used for patient's treatment. Although these drugs are ...
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journal_title:Toxicology and applied pharmacology
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journal_title:Toxicology and applied pharmacology
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journal_title:Toxicology and applied pharmacology
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journal_title:Toxicology and applied pharmacology
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abstract::Rats received one or two consecutive daily ip injections, each 0.5 mg Pb2+/100 g body weight, and the kidneys were studied 48 or 24 hr, respectively, after the injection. Renal brush border preparations from Pb2+-treated rats exhibited significant decreases in the activity of alanine aminopeptidase and gamma-glutamyl ...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/0041-008x(83)90224-7
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abstract::Eupafolin, a major active component found in the methanol extracts of Phyla nodiflora, has been used to treat inflammation of skin. We examined its effects on cyclooxygenase-2 (COX-2) expression in LPS-treated human dermal fibroblasts. Lipopolysaccharide (LPS) significantly increased prostaglandin-E2 (PGE2) production...
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journal_title:Toxicology and applied pharmacology
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doi:10.1006/taap.1994.1052
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journal_title:Toxicology and applied pharmacology
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journal_title:Toxicology and applied pharmacology
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doi:10.1016/j.taap.2016.12.015
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journal_title:Toxicology and applied pharmacology
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doi:10.1006/taap.1995.1114
更新日期:1995-06-01 00:00:00
abstract::An infamous poison, arsenic also has been used as a drug for nearly 2400 years; in recently years, arsenic has been effective in the treatment of acute promyelocytic leukemia. Increasing evidence suggests that opposite effects of arsenic trioxide (ATO) on tumors depend on its concentrations. For this reason, the mecha...
journal_title:Toxicology and applied pharmacology
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journal_title:Toxicology and applied pharmacology
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journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/0041-008x(89)90182-8
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journal_title:Toxicology and applied pharmacology
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journal_title:Toxicology and applied pharmacology
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journal_title:Toxicology and applied pharmacology
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abstract::The aim of the present study was to evaluate the in vitro modulation of muscarinic autoreceptor function by the organophosphorus (OP) anticholinesterases chlorpyrifos oxon, paraoxon, and methyl paraoxon. Acetylcholine (ACh) release was studied by preloading slices from rat striatum with [3H]choline and depolarizing wi...
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journal_title:Toxicology and applied pharmacology
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journal_title:Toxicology and applied pharmacology
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journal_title:Toxicology and applied pharmacology
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abstract::Increased oxygen species production has often been cited as a mechanism determining synergism on cell death and growth inhibition effects of arsenic-combined drugs. However the net effect of drug combination may not be easily anticipated solely from available knowledge of drug-induced death mechanisms. We evaluated th...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
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journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2014.04.013
更新日期:2014-07-01 00:00:00
abstract::Exposure of rodents to benzo[a]pyrene (BaP) associated with particles has previously been shown to result in increased retention of BaP and metabolites in lungs. To determine if DNA damage might be enhanced, DNA adducts were measured in lungs of F344 rats following inhalation of pure BaP aerosols or BaP absorbed on ca...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/0041-008x(89)90334-7
更新日期:1989-02-01 00:00:00
abstract::Mitotic catastrophe, a form of cell death resulting from abnormal mitosis, is a cytotoxic death pathway as well as an appealing mechanistic strategy for the development of anti-cancer drugs. In this study, 6-bromine-5-hydroxy-4-methoxybenzaldehyde was demonstrated to induce DNA double-strand break, multipolar spindles...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
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更新日期:2011-05-01 00:00:00