Abstract:
:Thymidylate synthase (TYMS; EC 2.1.1.15) catalyzes the reductive methylation of 2'-deoxyuridine-5'-monophosphate (dUMP) by N(5),N(10)-methyhlenetetrahydrofolate, forming dTMP for the maintenance of DNA replication and repair. Inhibitors of TYMS have been widely used in the treatment of neoplastic disease. A number of fluoropyrimidine and folate analogs have been developed that lead to inhibition of the enzyme, resulting in dTMP deficiency and cell death. In the current study, we have examined the role of oxidative stress in response to TYMS inhibitors. We observed that intracellular reactive oxygen species (ROS) concentrations are induced by these inhibitors and promote apoptosis. Activation of the enzyme NADPH oxidase (NOX), which catalyzes one-electron reduction of O2 to generate superoxide (O2 (●-)), is a significant source of increased ROS levels in drug-treated cells. However, gene expression profiling revealed a number of other redox-related genes that may contribute to ROS generation. TYMS inhibitors also induce a protective response, including activation of the transcription factor nuclear factor E2-related factor 2 (NRF2), a critical mediator of defense against oxidative and electrophilic stress. Our results show that exposure to TYMS inhibitors induces oxidative stress that leads to cell death, while simultaneously generating a protective response that may underlie resistance against such death.
journal_name
Mol Pharmacoljournal_title
Molecular pharmacologyauthors
Ozer U,Barbour KW,Clinton SA,Berger FGdoi
10.1124/mol.115.099614subject
Has Abstractpub_date
2015-12-01 00:00:00pages
970-81issue
6eissn
0026-895Xissn
1521-0111pii
mol.115.099614journal_volume
88pub_type
杂志文章abstract::Mitochondria contain specific Ca2+ antagonist binding sites that are associated with an inner mitochondrial membrane anion channel. These mitochondrial Ca2+ antagonist receptors can be solubilized with digitonin and partially purified [as assessed by postreversible (+/-)-[3H]nitrendipine binding] using ion exchange ch...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:
更新日期:1992-12-01 00:00:00
abstract::The present study investigates mRNA and protein levels of A3 adenosine receptors in resting (R) and activated (A) human lymphocytes. The receptors were evaluated by the antagonist radioligand [3H]5-N-(4-methoxyphenyl-carbamoyl)amino-8-propyl-2(2furyl)-pyrazolo-[4,3e]-1,2,4-triazolo-[1,5-c]-pyrimidine ([3H]MRE 3008F20)...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.65.3.711
更新日期:2004-03-01 00:00:00
abstract::We studied the mechanism by which the peptide omega-grammotoxin-SIA inhibits voltage-dependent calcium channels. Grammotoxin at concentrations of > 50 nM completely inhibited inward current carried by 2 mM barium through P-type channels in rat cerebellar Purkinje neurons when current was elicited by depolarizations up...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.52.6.1095
更新日期:1997-12-01 00:00:00
abstract::Prolonged ethanol exposure causes central nervous system hyperexcitability that involves a loss of GABAergic inhibition. We previously demonstrated that long-term ethanol exposure enhances the internalization of synaptic GABA(A) receptors composed of alpha1beta2/3gamma2 subunits. However, the mechanisms of ethanol-med...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.109.063016
更新日期:2010-05-01 00:00:00
abstract::It has long been believed that the cortical actin cytoskeleton plays an important role in regulating the secretion of hormones and neurotransmitters. In this study, we investigated the control of actin dynamics in primary neuroendocrine cells and determined the relationship of actin dynamics to various components of t...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.104.008474
更新日期:2005-04-01 00:00:00
abstract::A central axiom of ligand-receptor theory is that agonists bind more tightly to active than to inactive receptors. However, measuring agonist affinity in inactive receptors is confounded by concomitant activation. We identified a cysteine substituted mutant γ-aminobutyric acid type A (GABAA) receptor with unique chara...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.112.084558
更新日期:2013-06-01 00:00:00
abstract::Glutamatergic synaptic transmitters are cleared from the synaptic cleft through excitatory amino acid transporters (EAATs) that are responsible for recycling glutamate and transporting it into neurons and glial cells. To probe the structural role of the TM4b-4c loop of EAAT1 (Rattus norvegicus), each of the 57 amino a...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.117.111245
更新日期:2018-07-01 00:00:00
abstract::Neurotrophins are a family of secreted proteins that play an important role in the development, differentiation, and survival of neurons. Studies also suggest that aberrant neurotrophin signaling may play a role in processes underlying disease states such as schizophrenia, Alzheimer's disease, and depression. Whereas ...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.105.020255
更新日期:2006-04-01 00:00:00
abstract::A nonnaturally occurring L-configuration nucleoside analog, L-beta-5-bromovinyl-(2-hydroxymethyl)-1,3-(dioxolanyl)uracil (L-BVOddU) selectively inhibited varicella-zoster virus growth in human embryonic lung (HEL) 299 cell culture with an EC(50) of 0.055 microM, whereas no inhibition of CEM and HEL 299 cell growth or ...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.58.5.1109
更新日期:2000-11-01 00:00:00
abstract::The nuclear receptor peroxisome proliferator-activated receptor (PPAR) is activated by a diverse group of acidic ligands, including many peroxisome proliferator chemicals present in the environment. Janus tyrosine kinase-signal transducer and activator of transcription (JAK-STAT) signaling is activated by multiple cyt...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.64.2.355
更新日期:2003-08-01 00:00:00
abstract::β-Adrenergic receptor blockers (β-blockers) are commonly used to treat heart failure, but the biologic mechanisms governing their efficacy are still poorly understood. The complexity of β-adrenergic signaling coupled with the influence of receptor polymorphisms makes it difficult to intuit the effect of β-blockers on ...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.113.090951
更新日期:2014-08-01 00:00:00
abstract::The endogenous bronchodilator, S-nitrosoglutathione (GSNO), increases expression, maturation, and function of both the wild-type and the DeltaF508 mutant of the cystic fibrosis transmembrane conductance regulatory protein (CFTR). Though transcriptional mechanisms of action have been identified, GSNO seems also to have...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.106.023242
更新日期:2006-10-01 00:00:00
abstract::The mechanism underlying the crosstalk between multiple G protein-coupled receptors remains poorly understood. We previously reported that prostaglandin E receptor EP1 facilitates dopamine D1 receptor signaling in striatal slices and promotes behavioral responses induced by D1 receptor agonists. Here, using human embr...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.113.087288
更新日期:2013-09-01 00:00:00
abstract::Recent studies from our laboratory have provided evidence that multiple states of the phencyclidine (PCP) receptor exist. In addition, several compounds such as PCP and the novel anticonvulsant MK-801 were found to inhibit binding more potently in the presence of Mg2+ and L-glutamate (L-GLU) than when these agents wer...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:
更新日期:1989-07-01 00:00:00
abstract::The gene encoding a human 5-hydroxytryptamine (5-HT)1 receptor subtype was isolated from a human placental genomic library by using oligonucleotide probes derived from transmembrane regions of the cloned human 5-HT1D beta receptor. The deduced amino acid sequence of the genomic clone hp75d is identical to that of the ...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:
更新日期:1992-08-01 00:00:00
abstract::Chronic stimulation of beta-adrenoceptors leads to increased mRNA and protein levels of pertussis toxin (PTX)-sensitive guanine nucleotide-binding proteins (G proteins) in the heart. In the present study the time course is reported of the effect of isoprenaline infusions on myocardial mRNA levels of Gi alpha-2, Gi alp...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:
更新日期:1992-11-01 00:00:00
abstract::Caveolins have been recognized over the past few decades as key regulators of cell physiology. They are ubiquitously expressed and regulate a number of processes that ultimately impact efficiency of cellular processes. Though not critical to life, they are central to stress adaptation in a number of organs. The follow...
journal_title:Molecular pharmacology
pub_type: 杂志文章,评审
doi:10.1124/mol.117.111237
更新日期:2018-04-01 00:00:00
abstract::Binding of [3H](d)-N-allylnormetazocine ([3H](d)-NANM) to rat brain membranes is stereospecific, reversible, and saturable (Bmax = 260 fmol/mg of protein) and manifests moderately high affinity (Kd = 20 nM). The rank order of potency among opioidbenzomorphans and phencyclidine (PCP) analogs for competition for [3H](d)...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:
更新日期:1985-01-01 00:00:00
abstract::The use of classic antipsychotic drugs is limited by the occurrence of extrapyramidal motor symptoms, which are caused by dopamine (DA) receptor blockade in the neostriatum. We examined the impact of early-life stress on haloperidol-induced catalepsy using the rat model of prenatal restraint stress (PRS). Adult "PRS r...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.113.085530
更新日期:2013-08-01 00:00:00
abstract::Cell-penetrating peptides are amphipathic or cationic oligopeptides able to transport covalently attached cargoes across cell membranes. Peptide aptamers are polypeptide fragments of endogenous proteins that mimic and thus perturb interactions with other cellular proteins. Combining aptamer and CPP technology can gene...
journal_title:Molecular pharmacology
pub_type: 评论,杂志文章
doi:10.1124/mol.105.011429
更新日期:2005-04-01 00:00:00
abstract::When expressed via an inducible promoter in human embryonic kidney 293 cells, the rat Mas-related gene D (rMrgD) receptor responded to beta-alanine but not L-alanine by elevating intracellular [Ca(2+)], stimulating phosphorylation of the mitogenactivated protein kinases known as extracellular signal-regulated kinase (...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.105.018788
更新日期:2006-02-01 00:00:00
abstract::Squamous cell carcinoma of the head and neck (SCCHN) is one of the most common malignancies worldwide, with low 5-year survival rates. Current strategies that block epidermal growth factor receptor (EGFR) have limited effects when administered as single agents. Targeting EGFR via intratumoral administration of phospho...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.107.041160
更新日期:2008-03-01 00:00:00
abstract::The endocannabinoids anandamide and 2-arachidonyl glycerol (2-AG) bind to G protein-coupled central and peripheral cannabinoid receptors CB1 and CB2, respectively. Due to the relatively high expression of the CB2 isotype on peripheral immune cells, it has been hypothesized that this receptor mediates the immunosuppres...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:
更新日期:2000-05-01 00:00:00
abstract::Retroviral integrases are essential for viral replication and represent an attractive chemotherapeutic target. In the current study, we demonstrated the activity of micromolar concentrations of dinucleotides against human immunodeficiency virus type 1 (HIV-1), HIV type 2 (HIV-2), simian immunodeficiency virus, and fel...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.51.4.567
更新日期:1997-04-01 00:00:00
abstract::In light of the potential use of the thiazolidinedione family of peroxisome proliferator-activated receptor-gamma (PPARgamma) agonists in prostate cancer treatment, this study assessed the mechanism by which these agents suppress prostate-specific antigen (PSA) secretion in prostate cancer cells. Two lines of evidence...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.105.018333
更新日期:2006-05-01 00:00:00
abstract::Capsaicin (vanilloid) sensitivity has long served as the functional signature of a subset of nociceptive sensory neurons. Mutagenesis studies have revealed seemingly distinct regions involved in mediating ligand binding and channel activation at the capsaicin binding site. Residue 547 (transmembrane region 4) mediates...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.106.023945
更新日期:2006-09-01 00:00:00
abstract::Both in vivo and in vitro treatments with the irreversible protein-modifying reagent, N-ethoxycarbonyl-2-ethoxy-1,2-dihydroquinoline (EEDQ), were used to investigate rat striatal D1 dopamine receptor/effector interactions. Peripherally administered EEDQ markedly reduced D1 dopamine receptor binding and D1 dopamine rec...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:
更新日期:1987-01-01 00:00:00
abstract::Macrophage production of growth factors for fibroblasts, in particular platelet-derived growth factor B [PDGF(B)] and transforming growth factor-beta (TGF-beta), is thought to be central to the pathogenesis of pulmonary fibrosis. In a search for anti-inflammatory agents that might prevent this process, we asked whethe...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:
更新日期:1992-10-01 00:00:00
abstract::We reported earlier that delta 9-tetrahydrocannabinol (THC), the main psychoactive ingredient in marihuana, increased markedly the level of unesterified arachidonic acid (AA) in guinea pig cerebral cortex slices prelabeled with [14C]AA. The purpose of the present study was to clarify the mechanism underlying THC-enhan...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:
更新日期:1991-10-01 00:00:00
abstract::Excitotoxin-induced destruction of striatal neurons, proposed as a model of Huntington's disease, involves a process having the biochemical stigmata of apoptosis. Recent studies suggested that transcription factor nuclear factor (NF)-kappa B may be involved in excitotoxicity. To further analyze the contribution of NF ...
journal_title:Molecular pharmacology
pub_type: 杂志文章
doi:10.1124/mol.53.1.33
更新日期:1998-01-01 00:00:00