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Topic: Cyclic adenosine monophosphate


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In the News (Wed 11 Nov 09)

  
  adenosine monophosphate - HighBeam Encyclopedia
adenosine monophosphate (AMP), organic compound composed of an adenine base, the sugar ribose, and one phosphate unit.
Cyclic AMP, a very close structural relative of AMP containing an additional ester linkage between the phosphate and ribose units, can act as a secondary messenger for several hormones.
Protein kinase C inhibits cyclic adenosine monophosphate-induced calcium-activated and voltage-activated potassium channel activity in fawn-hooded rat pulmonary arterial smooth muscle via phosphodiesterases *.
www.encyclopedia.com /doc/1E1-adenosinmp.html   (448 words)

  
 [No title]
Phosphorylation of cyclic adenosine monophosphate (AMP) response element binding protein (CREB) was examined immunohistochemically in the corpus callosum of the rat brain at various time points after 90-minute focal cerebral ischemia.
Involvement of 5-hydroxytryptamine, prostaglandin E2, and cyclic adenosine monophosphate in cholera toxin-induced fluid secretion in the small intestine of the rat in vivo.
Cyclic adenosine monophosphate (cAMP) was measured with a competitive binding assay kit using 3H-labeled cAMP (Amersham).
www.lycos.com /info/cyclic-adenosine-monophosphate.html   (640 words)

  
 Product Abstract: Forskolin
Furthermore, adenosine 3',5'-cyclic monophosphate contents were higher in the right ventricle and lower in the left ventricle from infarcted animals injected with saline, isoproterenol, or forskolin in comparison to the controls.
Cyclic adenosine monophosphate formation was measured in cell membranes isolated from rhesus monkey ciliary muscle, ciliary muscle, ciliary processes, trabecular meshwork, and iris in the presence of forskolin, indomethacin, epinephrine, or indomethacin and epinephrine combined.
This suggests that increased cyclic adenosine monophosphate content is not necessarily involved in the genesis of ischemia-induced arrhythmias, and that some other facet of adrenoceptor stimulation or catecholamine action may be involved.
www.lef.org /prod_hp/abstracts/php-ab107.html   (6693 words)

  
 cyclic adenosine monophosphate
...cAMP (cyclic adenosine monophosphate) is modulated by adenyl cyclase, which result in a decline in the free calcium concentrations, which allows for the...
The metabolic pathway of cyclic adenosine monophosphate is also inhibited by this drug, resulting in retention of electrolytes [21,22].
The pulmonary artery intravascular cyclic adenosine monophosphate content was compared between the 3 groups (post–cardiopulmonary bypass).
www.mongabay.com /igapo/biotech/cyclic_adenosine_monophosphate.html   (246 words)

  
 8N3cAMP Uses   (Site not responding. Last check: 2007-10-12)
Cyclic AMP is also involved in controlling gene expression and cell division, in immune responses, and in nervous transmission.
Cyclic AMP-dependent protein kinase in rat mammary tissue: expression of catalytic and regulatory subunits throughout pregnancy and lactation.
Cyclic AMP functions as a "second messenger" to relay extracellular signals to intracellular effectors such as protein kinase A, and regulation of intracellular concentrations of cyclic AMP is largely a result in controlling adenylyl cyclase.
www.altcorp.com /AffinityLabeling/8n3campuses.htm   (3399 words)

  
 About Adenosine // Adenosine Therapeutics
Adenosine is a naturally occurring, physiologically active molecule that is produced in many sites in the body in response to multiple types of stimuli (i.e.
Adenosine mediates its varied effects by activating specific subtypes of adenosine receptors that are constituents of the cell membrane.
However, the utility of adenosine as a therapeutic has been limited in that there is not a convenient way to selectively deliver adenosine to specific sites or to limit its ability activate untargeted adenosine receptor subtypes, that can produce undesired side effects or even antagonize the desired pharmacodynamic response.
www.adenrx.com /about-adenosine.html   (349 words)

  
 Role of MRP4 and MRP5 in Biology and Chemotherapy
Cyclic GMP is an important mediator of the effects of nitric oxide (NO) and also has demonstrated effects on chloride ion transport in the kidney.
Cyclic AMP efflux is regulated by occupancy of the adenosine receptor in pig aortic smooth muscle cells.
Characterization of cyclic AMP efflux from swine adipocytes in vitro.
www.aapsj.org /view.asp?art=ps040314   (4410 words)

  
 Beta-adrenergic receptor agonists and cyclic nucleotide phosphodiesterase inhibitors: shifting the focus from inotropy ...
Cyclic adenosine monophosphate generated by adenylate cyclase activates cAMP-dependent protein kinase (PK-A), some of which is in the cytosol and some of which is bound to intracellular membranes by anchoring proteins (AKAPs).
myocytes by inhibiting its breakdown by cyclic nucleotide phosphodiesterases.
The "conventional" interpretation is that increasing intracellular cyclic adenosine monophosphate (cAMP) content causes a short-term increase in contractility that causes a reduction in long-term survival.
content.onlinejacc.org /cgi/content/full/34/2/318   (4129 words)

  
 adenosine monophosphate — Infoplease.com
Effects of aerosolized adenosine 5'-triphosphate vs adenosine 5'-monophosphate on dyspnea and airway caliber in healthy nonsmokers......
Modifications of airway responsiveness to adenosine 5'-monophosphate and exhaled nitric oxide concentrations after the pollen season......
Protein kinase C inhibits cyclic adenosine monophosphate-induced calcium-activated and voltage-activated potassium channel activity......
www.infoplease.com /ce6/sci/A0802492.html   (291 words)

  
 REGULATORY CASCADES
The cyclic adenosine monophosphate (cAMP) cascade in the thyroid corresponds, as far as it has been studied, to the canonic model of the β-adrenergic receptor cascade (116) (Fig.
For several effects of cyclic AMP (eg NIS and thyroglobulin induction, DNA synthesis) protein kinase A is required but not sufficient and activation of EPAC and protein kinase A is not sufficient either (176).
Cross-signaling between the cyclic AMP pathway and growth factor activated cascades have been observed in various cell types (193, 194).
www.thyroidmanager.org /Chapter1/ch01s07.html   (1666 words)

  
 Effects of bright light on circadian patterns of cyclic adenosine monophosphate, melatonin and cortisol in healthy ...
Effects of bright light on circadian patterns of cyclic adenosine monophosphate, melatonin and cortisol in healthy subjects -- Lemmer et al.
Effects of bright light on circadian patterns of cyclic adenosine monophosphate, melatonin and cortisol in healthy subjects
Bright light is known as a strong zeitgeber on human circadian rhythms and influences several endocrine and neuroendocrine functions.
www.eje.org /cgi/content/abstract/130/5/472   (225 words)

  
 Cyclic guanosine monophosphate - Wikipedia, the free encyclopedia
Cyclic guanosine monophosphate (cGMP) is a second messenger derived from GTP.
Cyclic guanosine monophosphate (cGMP) is a cyclic nucleotide derived from guanosine triphosphate (GTP).
Cyclic nucleotide phosphodiesterases (PDE 1-6) degrade cGMP by hydrolyzing cGMP into 5'-GMP.
en.wikipedia.org /wiki/Cyclic_guanosine_monophosphate   (317 words)

  
 Estrogen Receptor, Cyclic Adenosine Monophosphate, and Protein Kinase A Are Involved in the Nongenomic Pathway by Which ...
Estrogen Receptor, Cyclic Adenosine Monophosphate, and Protein Kinase A Are Involved in the Nongenomic Pathway by Which Estradiol Accelerates Oviductal Oocyte Transport in Cyclic Rats -- Orihuela et al.
Estrogen Receptor, Cyclic Adenosine Monophosphate, and Protein Kinase A Are Involved in the Nongenomic Pathway by Which Estradiol Accelerates Oviductal Oocyte Transport in Cyclic Rats
Acceleration of oviductal transport of oocytes induced by estradiol in cycling rats is mediated by nongenomic stimulation of protein phosphorylation in the oviduct.
www.biolreprod.org /cgi/content/full/68/4/1225   (4570 words)

  
 Integrated Imaging Center - Fees
Brooker, G., Thomas, L. and Appleman, M. Michael: The Assay of Adenosine 3'5' Cyclic Monophosphate and Guanosine 3'5' Cyclic Monophosphate in Biological Materials by Enzymatic Radioisotopic Displacement.
Harper, J. and Brooker, G.: Refractoriness to Muscarinic and Adrenergic Agonists in the Rat Parotid: Responses of Adenosine and Guanosine Cyclic 3',5'-Monophosphates.
Brooker, G.: Dissociation of Cyclic GMP from the Negative Inotropic Action of Carbachol in Guinea Pig Atria.
www.jhu.edu /iicmcc/contacts/brooker.htm   (2642 words)

  
 Transplantation strategies to promote repair of the injured spinal cord   (Site not responding. Last check: 2007-10-12)
The contusion injury model was used to compare Schwann cell and olfactory ensheathing glia transplantation and to examine the results of combining Schwann cell transplants with elevated levels of cyclic adenosine monophosphate.
The improved regeneration response usually involved a reduction in secondary tissue loss, axonal regeneration from brainstem neurons, an increase in myelinated fibers in the transplant, the exit of regenerated fibers from the transplant into the contiguous cord, and an improvement in locomotor function.
Adenyl cyclase converts adenosine triphosphate (ATP), the prevalent store of energy of the cell, into the second messenger, cAMP, which in turn activates protein kinase A (PKA), the cAMP-dependent protein kinase, by cleavage of its catalytic subunit from the repressor subunit.
www.vard.org /jour/03/40/4Sup1/bunge.html   (4464 words)

  
 Research Perspectives in Asthma: A Rationale for the Therapeutic Application of Magnesium, Pyridoxine, Coleus ...
Magnesium is a critical cofactor in cellular biochemistry areas such as production of adenosine triphosphate (ATP) and cyclic adenosine monophosphate (cAMP) are mediated by magnesium status.
By competitive inhibition of ionized calcium (which induces smooth muscle tissue constriction via the elevation of cyclic guanine monophosphate), magnesium has been shown to relax bronchial smooth muscle tissue.
This enzyme is the critical catalyst in the production and conversion of magnesium mediated adenosine triphosphate (ATP) to cyclic adenosine monophosphate (cAMP) and is also antagonistic to the production of guanyl cyclase.
www.chiro.org /nutrition/ABSTRACTS/asthma.shtml   (1561 words)

  
 Cyclic adenosine monophosphate - Wikipedia, the free encyclopedia
The G protein associates with adenilate cyclase that converts ATP to cAMP, spreading the signal (more details...
Cyclic AMP is involved in some protein kinases.
For example, PKA (protein kinase A, also known as cAMP-dependent protein kinase) is normally inactive as a tetrameric holoenzyme, consisting of 2 catalytic and 2 regulatory units (C
en.wikipedia.org /wiki/Cyclic_adenosine_monophosphate   (602 words)

  
 News & Headlines: Cyclic Adenosine Monophosphate Crucial to Eosinophil Survival
News & Headlines: Cyclic Adenosine Monophosphate Crucial to Eosinophil Survival
(NewsRx.com) -- Cyclic adenosine monophosphate (cAMP), used to by the body as a signal to regulate some metabolic enzymes, plays an important role in promoting the survival of eosinophils, according to researchers writing in the journal
While several different kinds of protein kinase A inhibitors, which block the effects of the enzyme regulated by eosinophils, were able to prevent elevated eosinophil viability from IL-5, only mitogen-activating protein kinase inhibitors (MAPKs) blocked dbcAMP's protective effects, according to the report.
www.otohns.net /default.asp?id=7394   (200 words)

  
 Cyclic Adenosine Monophosphate Signaling in the Rat Vomeronasal Organ: Role of an Adenylyl Cyclase Type VI -- ...
Cyclic Adenosine Monophosphate Signaling in the Rat Vomeronasal Organ: Role of an Adenylyl Cyclase Type VI -- Rössler et al.
to an increase in the concentration of cyclic adenosine 3'-5'-monophosphate
Blazynski, C. and Cohen, A.I. Cyclic nucleotide distribution in identified layers of suprafused rabbit retinas.
chemse.oxfordjournals.org /cgi/content/full/25/3/313   (5060 words)

  
 BASAL AND ISOPROTERENOL-STIMULATED CYCLIC-ADENOSINE MONOPHOSPHATE LEVELS IN MOUSE HIPPOCAMPUS AND LYMPHOCYTES DURING ...
Coe, I. R., Dohrman, D. P., Constantinescu, A., Diamond, I. and Gordon, A. a) Activation of cyclic AMP-physically physically dependent protein kinase reverses tolerance of a nucleoside transporter to ethanol.
Diamond, I., Wrubel, B., Estrin, W. and Gordon, A. (1987) Basal and adenosine receptor-stimulated levels of cAMP are reduced in lymphocytes from alcoholic patients.
Diamond, I., Nagy, L., Mochly-Rosen, D. and Gordon, A. (1991) The role of adenosine and adenosine-transport in ethanol-induced cellular tolerance and dependence.
alcalc.oxfordjournals.org /cgi/content/full/38/1/11   (4334 words)

  
 Type 4 Cyclic Adenosine Monophosphate-Specific Phosphodiesterases Are Expressed in Discrete Subcellular Compartments ...
Type 4 Cyclic Adenosine Monophosphate-Specific Phosphodiesterases Are Expressed in Discrete Subcellular Compartments during Rat Spermiogenesis -- Salanova et al.
Type 4 Cyclic Adenosine Monophosphate-Specific Phosphodiesterases Are Expressed in Discrete Subcellular Compartments during Rat Spermiogenesis
degradation and inactivation is catalyzed by cyclic nucleotide
endo.endojournals.org /cgi/content/full/140/5/2297   (5686 words)

  
 Modulation by cAMP of IL-1{beta}-induced eotaxin and MCP-1 expression and release in human airway smooth muscle cells ...
Data are expressed as a percentage of the control response to IL-1ß alone and are represented as mean±sem of duplicate values from independent experiments using cells cultured from four different donors, cell passages three to six.
Inhibition of histamine-stimulated inositol phospholipid hydrolysis by agents which increase cyclic AMP levels in bovine tracheal smooth muscle.
Chen CH, Zhang DH, LaPorte JM, Ray A. Cyclic AMP activates p38 mitogen-activated protein kinase in Th2 cells: phosphorylation of GATA-3 and stimulation of Th2 cytokine gene expression.
erj.ersjournals.com /cgi/content/full/22/2/220   (3118 words)

  
 Antisense Cyclic Adenosine 5'-Monophosphate Response Element Modulator Up-Regulates IL-2 in T Cells from Patients with ...
Antisense Cyclic Adenosine 5'-Monophosphate Response Element Modulator Up-Regulates IL-2 in T Cells from Patients with Systemic Lupus Erythematosus -- Tenbrock et al.
Antisense Cyclic Adenosine 5'-Monophosphate Response Element Modulator Up-Regulates IL-2 in T Cells from Patients with Systemic Lupus Erythematosus
Cyclic Adenosine 5'-Monophosphate Response Element Modulator Is Responsible for the Decreased Expression of c-fos and Activator Protein-1 Binding in T Cells from Patients with Systemic Lupus Erythematosus
www.jimmunol.org /cgi/content/abstract/169/8/4147   (649 words)

  
 {beta}-adrenergic receptor-mediated growth of human airway epithelial cell lines -- Nishimura et al. 20 (2): 353 -- ...
Proliferation in the auditory receptor epithelium mediated by a cyclic AMP-dependent signaling pathway.
A possible role for cyclic AMP in the initiation of DNA synthesis by isoproterenol-activated parotid gland cells.
Stimulation by thyrotropin and cyclic AMP of the proliferation of quiescent canine thyroid cells cultured in a defined medium containing insulin.
erj.ersjournals.com /cgi/content/full/20/2/353   (2722 words)

  
 Effects of Dibutyryl Cyclic Adenosine Monophosphate on the Ultrastructure of Endothelial Cells in Rat Lungs Cold ...
Effects of Dibutyryl Cyclic Adenosine Monophosphate on the Ultrastructure of Endothelial Cells in Rat Lungs Cold Preserved for 15 Hours
Background: Dibutyryl cyclic adenosine monophosphate (db-cAMP) has been shown to protect vascular endothelial cells by increasing the level of intracellular cAMP, and we have previously reported its effectiveness in lung preservation.
Here, the effects of db-cAMP in lung preservation were ultrastructurally investigated, and the ultrastructural changes before reperfusion were correlated with pulmonary function after reperfusion.
content.karger.com /ProdukteDB/produkte.asp?Doi=8778   (386 words)

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