abstract：:Modulation of neuronal ion channels by the cloned rat brain CB1 cannabinoid receptor was investigated with the use of a heterologous neuronal expression system. Transient expression of the rat brain CB1 cannabinoid receptor was accomplished through microinjection of in vitro transcribed cRNA into the cytoplasm of enzy...

journal_title：Molecular pharmacology

authors： Pan X,Ikeda SR,Lewis DL

更新日期：1996-04-01 00:00:00

abstract：:Cu/Zn-superoxide dismutase (SOD)-accelerated oxidation of the benzene metabolite 1,4-hydroquinone (HQ) results in the enhanced formation of semiquinone anion radicals, electrophilic 1,4-benzoquinone (BQ), and H202. We selected bone marrow stromal cells and phiX-174 double stranded plasmid DNA as model systems to inves...

journal_title：Molecular pharmacology

authors： Li Y,Kuppusamy P,Zweir JL,Trush MA

更新日期：1996-03-01 00:00:00

abstract：:We demonstrate that gastrin-releasing peptide (GRP) can inhibit the proliferation of human immortal nontumorigenic (184-B5) mammary epithelial cells ectopically expressing the human GRP receptor. Growth of Balb 3T3 cells ectopically expressing relatively high levels of the GRP receptor was also inhibited by GRP; howev...

journal_title：Molecular pharmacology

authors： Feldman RI,Fried S,Mann E,Wu JM,Liang M

更新日期：1996-03-01 00:00:00

abstract：:Dehydroepiandrosterone (DHEA) is a peroxisome proliferating agent when administered in pharmacological dosages, but it has not been shown to function through the peroxisome proliferator-activated receptor in cell-based assays. Because members of the thyroid hormone/vitamins A and D nuclear receptor subfamily, includin...

journal_title：Molecular pharmacology

authors： Webb SJ,Xiao GH,Geoghegan TE,Prough RA

更新日期：1996-02-01 00:00:00

abstract：:Microinjection, but not extracellular application, of cytidine-5'-diphosphate-D-glucose (CDPG) has been shown to elicit Ca(2+)-dependent currents in Xenopus laevis oocytes. These responses were comparable to those of inositol-1,4,5-trisphosphate (InsP3) in being both rapid and dose dependent. For example, maximal ampl...

journal_title：Molecular pharmacology

authors： Kim HY,Thomas D,Hanley MR

更新日期：1996-02-01 00:00:00

abstract：:(6R)-5,6,7,8-Tetrahydrobiopterin (BH4), which is synthesized intracellularly from GTP, caused a concentration-dependent increase in rat pheochromocytoma (PC12) cell proliferation when added exogenously. Incubation with sepiapterin, which is converted enzymatically to BH4 within cells, also increased PC12 cell prolifer...

journal_title：Molecular pharmacology

authors： Anastasiadis PZ,States JC,Imerman BA,Louie MC,Kuhn DM,Levine RA

更新日期：1996-01-01 00:00:00

abstract：:Large conductance, Ca(2+)-activated K+ channels are believed to underlie interburst intervals and, thus, contribute to the control of hormone release from neurohypophysial terminals. Because ethanol inhibits the release of vasopressin and oxytocin, we studied its effects on large conductance, Ca(2+)-activated K+ chann...

journal_title：Molecular pharmacology

authors： Dopico AM,Lemos JR,Treistman SN

更新日期：1996-01-01 00:00:00

abstract：:Functional coupling between muscarinic (m3) receptors and two voltage-gated K+ (Kv) channels (Kv1.2 and Kv1.5) cloned originally from canine colonic smooth muscle was studied using the Xenopus oocytes expression system and a mammalian cell line (COS cells). Oocytes were coinjected with cRNAs encoding the human m3 rece...

journal_title：Molecular pharmacology

authors： Vogalis F,Ward M,Horowitz B

更新日期：1995-12-01 00:00:00

abstract：:Platelet-derived growth factor (PDGF) and PDGF receptors (PDGFRs) are ubiquitously expressed in the mammalian central nervous system, where they exert trophic actions on both neuronal and glial cells. However, the acute actions of PDGF on synaptic transmission are unknown. We report a novel regulatory action of PDGF/P...

journal_title：Molecular pharmacology

authors： Valenzuela CF,Kazlauskas A,Brozowski SJ,Weiner JL,Demali KA,McDonald BJ,Moss SJ,Dunwiddie TV,Harris RA

更新日期：1995-12-01 00:00:00

abstract：:Reconstitution experiments with purified components reproduce the basic characteristics of receptor/G protein coupling, i.e., GTP-sensitive high affinity agonist binding and receptor-promoted GTP binding. However, the interaction of agonists with the A1 adenosine receptor in rat and bovine but not human brain membrane...

journal_title：Molecular pharmacology

authors： Nanoff C,Mitterauer T,Roka F,Hohenegger M,Freissmuth M

更新日期：1995-11-01 00:00:00

abstract：:Thromboxane A2 stimulation of smooth muscle cells contributes to the development of vascular lesions after percutaneous transluminal coronary angioplasty. In view of this, we examined the signaling pathways stimulated by a thromboxane receptor agonist, U-46619, in cultures of rat aortic smooth muscle cells. Treatment ...

journal_title：Molecular pharmacology

authors： Jones DA,Benjamin CW,Linseman DA

更新日期：1995-11-01 00:00:00

abstract：:We used transcript-specific oligonucleotides to examine the localization in the rat nervous system of the corresponding mRNAs for the two P2X purinoceptor genes cloned recently from the rat vas deferens and PC12 cells. PC12 P2X purinoceptor mRNA was labeled in the olfactory tubercle, striatum, hypothalamus, hippocampu...

journal_title：Molecular pharmacology

authors： Kidd EJ,Grahames CB,Simon J,Michel AD,Barnard EA,Humphrey PP

更新日期：1995-10-01 00:00:00

abstract：:We cloned and expressed a human metabotropic glutamate receptor 1 alpha (HmGluR1 alpha) in a novel cell line. The human mGluR1 alpha cDNA was found to be 86% identical to rat mGluR1 alpha, and the predicted protein sequence was found to be 93% identical to rat mGluR1 alpha. We expressed HmGluR1 alpha in AV12-664, an a...

journal_title：Molecular pharmacology

authors： Desai MA,Burnett JP,Mayne NG,Schoepp DD

更新日期：1995-10-01 00:00:00

abstract：:Healing of gastrointestinal mucosal lesions occurs through two processes: an early one involving cell migration and a later one in which cell division replaces lost cells. Both processes require the presence of polyamines, but the mechanism of action of these compounds is unknown. In the present study, we examined the...

journal_title：Molecular pharmacology

authors： McCormack SA,Zimmerman BJ,Israel M,Blanner P,Johnson LR

更新日期：1995-10-01 00:00:00

abstract：:The 5-hydroxytryptamine3 receptor 5-HT3R has been implicated in gut and cardiac motility and in behavioral disorders. Characteristics of 5-HT3Rs appear to be heterogeneous among species, but human 5-HT3R cDNA has not been identified. We isolated a cDNA encoding 5-HT3R from human hippocampus. The mouse 5-HT3R gene has ...

journal_title：Molecular pharmacology

authors： Miyake A,Mochizuki S,Takemoto Y,Akuzawa S

更新日期：1995-09-01 00:00:00

abstract：:The beta 3-adrenergic receptor (beta 3AR) is a member of the super-family of G protein-coupled receptors that are characterized by seven putative transmembrane helices connected by hydrophilic loops. The mechanism by which the activated beta ARs transmit the signals across the plasma membrane involves the stimulation ...

journal_title：Molecular pharmacology

authors： Guan XM,Amend A,Strader CD

更新日期：1995-09-01 00:00:00

abstract：:In ND8-47 cells, a neuroblastoma x dorsal root ganglion hybrid cell line, activation of delta-opioid receptors induced an increase in the intracellular free calcium concentration ([Ca2+]i) through dihydropyridine-sensitive calcium channels. This effect was mediated by pertussis toxin-sensitive G proteins. The G protei...

journal_title：Molecular pharmacology

authors： Tang T,Kiang JG,Côté TE,Cox BM

更新日期：1995-08-01 00:00:00

abstract：:4-PIOL is a structural analog of GABA that has low efficacy at GABAA receptor CI- channels and activates a nondesensitizing CI- conductance in central neurons. We investigated the biophysical mechanisms of its low efficacy in embryonic olfactory bulb neurons, which express a limited number of GABAA receptor subunit tr...

journal_title：Molecular pharmacology

authors： Kristiansen U,Barker JL,Serafini R

更新日期：1995-08-01 00:00:00

abstract：:Novel methods of detecting and quantitating cooperative interactions between an agent and both a tritiated (muscarinic) antagonist and the endogenous agonist (acetylcholine), acting at a common (muscarinic) receptor, have been devised. In a semiquantitative protocol, binding data are transformed into affinity ratios (...

journal_title：Molecular pharmacology

authors： Lazareno S,Birdsall NJ

更新日期：1995-08-01 00:00:00

abstract：:n-Dodecylguanidine (C12-G) is an amphipathic compound with a guanidine moiety, which is positively charged at physiological pH, and a hydrophobic side chain. Its effects on an A-type K+ channel clone (rKv1.4) expressed in Xenopus oocytes were examined. C12-G caused a concentration-dependent (1-20 microM) positive shif...

journal_title：Molecular pharmacology

authors： Yao JA,Saxena NC,Ziai MR,Ling S,Tseng GN

更新日期：1995-07-01 00:00:00

abstract：:The mouse adrenocortical Y-1 cell line has been found to express high affinity binding sites for neuropeptide Y (NPY). Pharmacological studies have shown that these NPY binding sites are of the Y1 type. Reverse transcription-polymerase chain reaction using primers specific for the rat Y1 receptor revealed that the NPY...

journal_title：Molecular pharmacology

authors： Weng G,Yee F,Michl P,Reis D,Wahlestedt C

更新日期：1995-07-01 00:00:00

abstract：:Activation of N-methyl-D-aspartate (NMDA) receptors is required for induction of some lasting changes in nervous system structure and function. The cellular mechanisms involved in transducing receptor stimulation into long-lasting changes in cellular activity are unknown. Immediate-early genes (IEGs) have been implica...

journal_title：Molecular pharmacology

authors： Lerea LS,Carlson NG,McNamara JO

更新日期：1995-06-01 00:00:00

abstract：:Typical equilibrium binding experiments cannot be quantitatively analyzed on the basis of classical mathematical equations when the receptor concentration is so high that a significant fraction of the added radioligand concentration is in the bound form. In this paper, the appropriate equations are derived and used in...

journal_title：Molecular pharmacology

authors： Swillens S

更新日期：1995-06-01 00:00:00

abstract：:cRNAs encoding the kappa-opioid receptor and an inwardly rectifying, G protein-coupled, K+ channel were coinjected into Xenopus oocytes. The effects of kappa-opioid receptor agonists and antagonists on the membrane currents in these oocytes were studied using the two-electrode voltage-clamp technique. The kappa-opioid...

journal_title：Molecular pharmacology

authors： Ma GH,Miller RJ,Kuznetsov A,Philipson LH

更新日期：1995-05-01 00:00:00

abstract：:NAD(P):quinone acceptor oxidoreductase (quinone reductase) (DT-diaphorase, EC 1.6.99.2) is involved in the process of reductive activation of cytotoxic antitumor quinones and nitrobenzenes. In this study, we initially examined the relative abilities of mouse, rat, and human quinone reductases to reduce two prodrugs, C...

journal_title：Molecular pharmacology

authors： Chen S,Knox R,Lewis AD,Friedlos F,Workman P,Deng PS,Fung M,Ebenstein D,Wu K,Tsai TM

更新日期：1995-05-01 00:00:00

abstract：:The cytotoxic efficacy of antitumor drugs targeted at DNA topoisomerase II (topo II) in many cases varies in direct proportion to cellular topo II content. To investigate the transcriptional control of the predominant alpha form of topo II, the 5' flanking region of the human topo II alpha gene (positions -562 to +90)...

journal_title：Molecular pharmacology

authors： Fraser DJ,Brandt TL,Kroll DJ

更新日期：1995-04-01 00:00:00

abstract：:The mechanisms underlying mastoparan-induced elevation of the intracellular free calcium concentration ([Ca2+]i) were investigated in the insulin-secreting cell lines RINm5F and HIT. In both cell types, micromolar concentrations of mastoparan induced a prompt increase of [Ca2+]i, measured as an increase in fura-2 fluo...

journal_title：Molecular pharmacology

authors： Eddlestone GT,Komatsu M,Shen L,Sharp GW

更新日期：1995-04-01 00:00:00

abstract：:To enable the detailed pharmacological characterization of five bombesin (BN) analogs with respect to the human gastrin-releasing peptide (GRP) receptor, we ectopically expressed the receptor in BALB/3T3 cells. In such cells (termed GR1 cells), GRP stimulated DNA synthesis and Ca2+ mobilization. Two of these analogs, ...

journal_title：Molecular pharmacology

authors： Wu JM,Hoang DO,Feldman RI

更新日期：1995-04-01 00:00:00

abstract：:The 2,3,7,8-tetrachlorodibenzo-p-dioxin-transformed aryl hydrocarbon receptor (AHR) complex binds to xenobiotic-responsive element (XRE) sequences in the 5' flanking region of the CYP1A1 gene, resulting in initiation of transcription. Both components of the transformed AHR complex [the ligand-binding AHR monomer and t...

journal_title：Molecular pharmacology

authors： Bacsi SG,Reisz-Porszasz S,Hankinson O

更新日期：1995-03-01 00:00:00

abstract：:Bovine pulmonary artery endothelial (CPAE) cells respond to bradykinin, and it has been suggested that the receptors on these cells do not fall into the normal B1/B2 classification of bradykinin receptors [J. Pharmacol. Exp. Ther. 244:646-649 (1988)]. The present study describes a detailed characterization of the subt...

journal_title：Molecular pharmacology

authors： Smith JA,Webb C,Holford J,Burgess GM

更新日期：1995-03-01 00:00:00

abstract：:The co-transfection assay is a novel functional assay using cells transiently transfected with plasmids encoding intracellular receptors and corresponding reporter genes. Using this assay, natural product extracts were tested to identify compounds that modulate intracellular receptor activity, measured as changes in r...

journal_title：Molecular pharmacology

authors： Pathirana C,Stein RB,Berger TS,Fenical W,Ianiro T,Mais DE,Torres A,Goldman ME

更新日期：1995-03-01 00:00:00

abstract：:We examined the influence of the molecular structure of four novel adamantane derivatives on their ability to block the channels of nicotinic acetylcholine (ACh) and N-methyl-D-aspartate (NMDA) receptors. The structure of the drugs is Ad-CH2-N+H2-(CH2)5-R, where Ad is adamantane and R was varied from ammonium (IEM-175...

journal_title：Molecular pharmacology

authors： Antonov SM,Johnson JW,Lukomskaya NY,Potapyeva NN,Gmiro VE,Magazanik LG

更新日期：1995-03-01 00:00:00

abstract：:The class III antiarrhythmic drugs amiodarone and bretylium tosylate are cationic/amphiphilic, and various substances with these physico-chemical properties are known to directly activate heterotrimeric regulatory G proteins. We asked the question of whether class III antiarrhythmic drugs are also direct G protein act...

journal_title：Molecular pharmacology

authors： Hagelüken A,Nürnberg B,Harhammer R,Grünbaum L,Schunack W,Seifert R

更新日期：1995-02-01 00:00:00

abstract：:Recently we demonstrated that the effects of beta 2-adrenoceptor (AR) stimulation to augment Ca2+ current (ICa), cytosolic Ca2+ (Cai) transients, and contractility in rat ventricular myocytes are largely dissociated from its effect to increase cellular cAMP levels. This result suggested that beta 2ARs might be coupled...

journal_title：Molecular pharmacology

authors： Xiao RP,Ji X,Lakatta EG

更新日期：1995-02-01 00:00:00

abstract：:The mechanisms by which bisphosphonate drugs inhibit osteoclast-mediated bone resorption are unclear. Effects of bisphosphonates on cellular enzymes, metabolic pathways, and osteoclast morphology have previously been described and could culminate in a generalized cytotoxic effect or a decreased capacity of osteoclasts...

journal_title：Molecular pharmacology

authors： Rogers MJ,Xiong X,Brown RJ,Watts DJ,Russell RG,Bayless AV,Ebetino FH

更新日期：1995-02-01 00:00:00

abstract：:SC-54628 [1-(2-methylphenyl)-4-butyl-1,3-dihydro-3-[[6-[2-(1H- tetrazol-5-yl)phenyl]-3-pyridinyl]methyl]-2H-imidazol-2-one] and its 1-(2,6-dimethylphenyl)-2H-imidazol-2-one derivative SC-54629 were potent inhibitors of 125I-angiotensin II (125I-AII) binding to rat adrenal cortex angiotensin type 1 (AT1) receptors. SC-...

journal_title：Molecular pharmacology

authors： Olins GM,Chen ST,McMahon EG,Palomo MA,Reitz DB

更新日期：1995-01-01 00:00:00

abstract：:Interleukin-2 (IL-2) is an immunoregulatory cytokine whose biological effects are mediated through interaction with specific receptors on the surface of target cells. Due to its presumed role in generating a normal immune response, IL-2 is being evaluated for the treatment of a variety of tumors, in addition to infect...

journal_title：Molecular pharmacology

authors： Chang DZ,Tasayco ML,Ciardelli TL

更新日期：1995-01-01 00:00:00

abstract：:The aryl hydrocarbon receptor (AhR) is a transcriptional enhancer that is activated by the binding of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and related toxic xenobiotics, as well as some naturally occurring compounds. Ligand binding initiates 1) dissociation of the ligand-bound monomeric AhR from the ligand-unocc...

journal_title：Molecular pharmacology

authors： Henry EC,Rucci G,Gasiewicz TA

更新日期：1994-12-01 00:00:00

abstract：:The effects of interleukin (IL)-1 beta, IL-4, IL-6, tumor necrosis factor (TNF)-alpha, interferon (IFN)-alpha, IFN-gamma, and transforming growth factor (TGF)-beta 1 on cytochrome P-450 (CYP) 1A expression and polycyclic aromatic hydrocarbon (PAH)-mediated induction in primary human hepatocyte cultures were determined...

journal_title：Molecular pharmacology

authors： Abdel-Razzak Z,Corcos L,Fautrel A,Campion JP,Guillouzo A

更新日期：1994-12-01 00:00:00

abstract：:Melanocortins (MCs) have various physiological actions on the brain. The recent cloning of neural MC receptors opened new avenues to study the effects of these neuropeptides on the nervous system. Here we investigated the structure-activity relationships (SARs) of peptides derived from adrenocorticotropic hormone (ACT...

journal_title：Molecular pharmacology

authors： Adan RA,Cone RD,Burbach JP,Gispen WH

更新日期：1994-12-01 00:00:00