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Topic: Acetylcholine receptor


  
 Dorsal Root Ganglion Neurons Express Multiple Nicotinic Acetylcholine Receptor Subtypes -- Genzen et al. 86 (4): 1773 ...
Nicotinic acetylcholine receptors in the rat and primate nucleus tractus solitarius and on rat and human inferior vagal (nodose) ganglia: evidence from in vivo microdialysis and [125I] alpha-bungarotoxin autoradiography.
Neural nicotinic acetylcholine responses in sensory neurons from postnatal rat.
Choline acetyltransferase-immunoreactive profiles are presynaptic to primary sensory fibers in the rat superficial dorsal horn.
http://jn.physiology.org/cgi/content/full/86/4/1773   (5587 words)

  
 Acetylcholine
Often the most effective treatments are ligands which inhibit the breakdown of acetylcholine.
Over the past several years, a variety of research groups have focused on the development of selective nicotinic agonists.
The methyl group also prevents the penetration into the brain.
http://www.neurosci.pharm.utoledo.edu/MBC3320/acetylcholine.htm   (3098 words)

  
 Semiconductor Devices in Measuring the Acetylcholine Receptor
As desired, the intracellular and the extracellular measurements both showed very little response to carbachol as shown in figure 5 [1].
Since Myasthenia Gravis can be treated, the determination of the disease is vitally important [6].
As more research takes place in this area of microscale and nanoscale biomedical instrumentation, more advancement of biology in both clinical and research applications will take place.
http://www.csua.berkeley.edu/~yakura/stuff/mcb165/m165a.html   (2305 words)

  
 Conformation of Ligands Bound to the Muscarinic Acetylcholine Receptor -- Furukawa et al. 62 (4): 778 -- Molecular ...
and examining the diastereomers of conformationally rigid acetylcholine
amines, such as acetylcholine, are recognized by GPCRs, such as
Together, these studies indicate that the rigid acetylcholine
http://molpharm.aspetjournals.org/cgi/content/full/62/4/778   (4970 words)

  
 Enhanced Inhibition of a Mutant Neuronal Nicotinic Acetylcholine Receptor by Agonists: Protection of Function by ...
Takayama H, Majewska MD and London ED (1989) Interactions of noncompetitive inhibitors with nicotinic receptors in the rat brain.
Meyer E, Kuryatov A, Gerzanich V, Lindstrom J and Papke RL (1998) Analysis of 40H-GTS-21 selectivity and activity at human and rat
A, control ACh responses from an oocyte expressing wild-type
http://jpet.aspetjournals.org/cgi/content/full/301/2/765   (5276 words)

  
 Acetylcholine - Wikipedia, the free encyclopedia
Blocking, hindering or mimicking the action of acetylcholine has many uses in medicine.
Clinically they are used to reverse the action of muscle relaxants, to treat myasthenia gravis and in Alzheimer's disease (rivastigmine, which increases cholinergic activity in the brain).
On the other hand, since a shortage of acetylcholine in the brain has been associated with Alzheimer's disease, some drugs that inhibit acetylcholinesterase are used in the treatment of that disease.
http://en.wikipedia.org/wiki/Acetylcholine   (751 words)

  
 The Effects of Isoflurane on Acetylcholine Receptor Channels: 3. Effects of Conservative Polar-to-Nonpolar Mutations ...
of this study concerns the behavior of WT and the two mutant receptors
The mutant receptors studied here were chosen because they affect the interaction of QX-222 with the AChR channel (Charnet
receptors for isoflurane is caused by a drug dissociation rate
http://molpharm.aspetjournals.org/cgi/content/full/60/3/584   (5574 words)

  
 Activation of the Recombinant Human alpha 7 Nicotinic Acetylcholine Receptor Significantly Raises Intracellular Free ...
Costa, A. Patrick, J. and Dani, J. Improved technique for studying ion channels expressed in Xenopus oocytes, including fast perfusion.
Send reprint requests to: Dr. Osvaldo Delbono, Dept. of Physiology and Pharmacology, Bowman Gray School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157.
McGehee, D. and Role, L. Physiological diversity of nicotinic acetylcholine receptors expressed by vertebrate neurons.
http://jpet.aspetjournals.org/cgi/content/full/280/1/428   (6102 words)

  
 acetylcholine receptor antibody
It is also used to monitor reponse to therapy for myasthenia gravis.
The acetylcholine receptor antibody test is used to diagnose myasthenia gravis, a condition in which the muscles become tired and weak.
The presence of more than.05 nM (nanomoles) of acetylcholine receptors in the blood indicates the person may have myasthenia gravis.
http://www.northmemorial.com/healthencyclopedia/content/1013.asp   (144 words)

  
 Single Nucleotide Polymorphisms of the Human M1 Muscarinic Acetylcholine Receptor Gene
Many GPCRs have been found to contain single nucleotide polymorphisms (SNPs) that are involved in disease susceptibility or drug response (for a review, see reference
Although the muscarinic receptors are thought to contribute to certain neurological and psychiatric disorders, no sequence variations or alleles have been found that affect susceptibility to these diseases or response to muscarinic agonists.
Indeed, for the past 20 years, the cholinergic hypothesis has proposed that loss of cholinergic function is responsible for the cognitive symptoms of Alzheimer's.
http://www.aapspharmsci.org/view.asp?art=ps030431   (2027 words)

  
 Enhancement of D1 dopamine receptor-mediated locomotor stimulation in M4 muscarinic acetylcholine receptor knockout ...
D1 receptor-mediated locomotor stimulation, probably at the level
Our findings offer new perspectives for the treatment
precise physiological roles of the individual muscarinic receptor
http://www.pnas.org/cgi/content/abstract/96/18/10483   (1169 words)

  
 Human Alpha-7 Nicotinic Acetylcholine Receptor: Expression Levels and Promoter Polymorphisms as Predictors/Indicators ...
Through cooperative research initiatives such as these, it is our hope and goal that commercial products will be fully developed and made available to benefit veterans and others.
Despite advances in treatment and diagnostic methods, there remains a need for methods to diagnose and treat schizophrenic patients.
As schizophrenia runs in families, a molecular diagnostic for the alpha-7 nicotinic receptor provided to other family members may give the opportunity for early intervention.
http://www.vard.org/tts/avail/03-102.htm   (361 words)

  
 Functional Changes Of Fetal Muscle Acetylcholine Receptor During Mouse Development -- Grassi and Eusebi 13 (5): 247 -- ...
In developing muscles in vivo and in vitro, the acetylcholine
Differential expression patterns of five acetylcholine receptor subunit genes in rat muscle during development.
to the notion that receptor structure determines its function.
http://physiologyonline.physiology.org/cgi/content/full/13/5/247   (1931 words)

  
 nicotinic Acetylcholine Receptor antibody [88B] (ab2804) datasheet
Immunohistochemical staining of nAChR in rat skeletal muscle results in strong staining of the motor endplate.
Customer reviews (feedback) regarding nicotinic Acetylcholine Receptor antibody [88B]
The non-channel linked AChR that medicates the slow actions of acetylcholine, which can be either inhibitory or excitatory, is called muscarinic AChR (mAChR) because it can be activated by muscarine.
http://www.abcam.com/?datasheet=2804   (602 words)

  
 Biochemistry of Neurotransmitters
King, Ph.D / IU School of Medicine / miking at iupui.edu
The anxiolytic drugs of the benzodiazepine family exert their soothing effects by potentiating the responses of GABA-A receptors to GABA binding.
ChE inhibitors have been used as components of nerve gases but also have significant medical application in the treatment of disorders such as glaucoma and myasthenia gravis as well as in terminating the effects of neuromuscular blocking agents such as atropine.
http://web.indstate.edu/thcme/mwking/nerves.html   (1674 words)

  
 Agrin-induced Activation of Acetylcholine Receptor-bound Src Family Kinases Requires Rapsyn and Correlates with ...
A Single Pulse of Agrin Triggers a Pathway That Acts To Cluster Acetylcholine Receptors
Cooperative Regulation by Rac and Rho of Agrin-induced Acetylcholine Receptor Clustering in Muscle Cells
Src-Class Kinases Act within the Agrin/MuSK Pathway to Regulate Acetylcholine Receptor Phosphorylation, Cytoskeletal Anchoring, and Clustering
http://www.jbc.org/cgi/content/abstract/276/17/14505   (758 words)

  
 Internalization of the M2 muscarinic acetylcholine receptor proceeds through an atypical pathway in HEK293 cells that ...
In this report we utilized several independent approaches to reveal
The Metabotropic Glutamate Receptor mGluR5 Is Endocytosed by a Clathrin-independent Pathway
Internalization of the M2 muscarinic acetylcholine receptor proceeds through an atypical pathway in HEK293 cells that is independent of clathrin and caveolae
http://jcs.biologists.org/cgi/content/abstract/114/4/739   (658 words)

  
 Neuro-Immunology lab -- Acetylcholine Receptor Antibody
Borderline corresponds to levels of precipitation between the mean +2SD and mean +3SD of a group of healthy controls but are less than our low positive (1nmol/liter).
This test is aimed at detecting even very low levels of antibodies.
We use human antigen and compare precipitation induced by the serum to be tested to that induced by normal sera and a series of standards containing acetylcholine receptor antibodies.
http://www.interchg.ubc.ca/neuroimm/mg.html   (696 words)

  
 Regulation of Acetylcholine Receptor Gene Expression in Human Myasthenia Gravis Muscles . Evidences for a Compensatory ...
(57) and acetylcholine release at muscle endplates from MG patients
Koenig (1988) Effect of myasthenic patient sera on the number and distribution of acetylcholine receptors in muscle and nerve-muscle cultures from rat.
Regulation of Acetylcholine Receptor Gene Expression in Human Myasthenia Gravis Muscles.
http://www.jci.org/cgi/content/full/102/1/249   (7222 words)

  
 ARUP: Acetylcholine Receptor Antibodies
Acetylcholine receptors from normal human muscle: concentrations, purification, and use in radioreceptor assays for autoantibodies.
Functional activities of autoantibodies to acetylcholine receptors and the clinical severity of myasthenia gravis.
Synaptic actions of acetylcholine: problems for future research.
http://www.aruplab.com/guides/clt/tests/clt_al20.jsp   (722 words)

  
 Acetylcholine receptor - Wikipedia, the free encyclopedia
Muscarinic acetylcholine receptors can be blocked by the drugs atropine and scopolamine.
Nicotinic receptors are the main mediator of nicotine and tobacco addiction.
Like other transmembrane receptors, acetylcholine receptors are classified according to their "pharmacology", or according to their relative affinities and sensitivities to different molecules.
http://en.wikipedia.org/wiki/Acetylcholine_receptor   (359 words)

  
 NodeWorks - Encyclopedia: Muscarinic acetylcholine receptor
Acetylcholine (ACh) is used as a neurotransmitter within the autonomic nervous system.
For example, the drug pirenzepine is a muscinaric antagonist (decreases the effect of ACh) which is much more potent at M1 receptors than it is at other subtypes.
A very few parts of the sympathetic system (sweating, for example), do use acetylcholine as a neurotransmitter at this position.
http://pedia.nodeworks.com/M/MU/MUS/Muscarinic_acetylcholine_receptor   (1455 words)

  
 Acetylcholine receptor antibody Encyclopedia Search - Drug Price Search
Presence of acetylcholinesterase antibody in the blood of patients with symptoms of myasthenia gravis supports the diagnosis, but lack of these antibodies does not rule out this condition.
The acetylcholine receptor antibody attacks receptors for the neurotransmitter acetylcholine, which sends signals from nerves to muscles and from nerve to nerve in the brain.
This is a diagnostic test for myasthenia gravis.
http://www.drug-price-search.com/encyclopedia/?encyclopedia_name_url=87&level=2   (435 words)

  
 Differences in the interaction of acetylcholine receptor antibodies with receptor from normal, denervated and ...
and severe clinical symptoms the existence of acetylcholine receptor
myasthenia gravis and with receptor from denervated muscle.
receptor antibodies was strongest with receptor from a patient with
http://jnnp.bmjjournals.com/cgi/content/abstract/45/1/70   (142 words)

  
 KRONUS - Technical Product Information - Neuromuscular
Autoantibodies to the Acetylcholine receptor (AChRAb) can be detected in 80-90% of patients with myasthenia gravis.
While the majority of the anti-AChR autoantibodies in the sera of patients with MG recognize the fetal form of the AChR, some MG patient sera contain autantibodies that specifically bind to adult AChR.
Lambert-Eaton Myasthenic Syndrome (LEMS) is a disorder of neuromuscular transmission caused by antibodies that impair the presynaptic release of acetylcholine.
http://www.kronus.com/technical/neuromuscular.html   (478 words)

  
 NEJM -- Cellular immunity in myasthenia gravis. Response to purified acetylcholine receptor and autologous thymocytes
To determine the potential importance of an immune response directed against the acetylcholine receptor in myasthenia gravis, we studied cell-mediated immunity to receptor as measured by lymphocyte stimulation in 21 myasthenic patients and 21 controls, including five with amyotrophic lateral sclerosis.
Our findings are further evidence that autoimmunity to the acetylcholine receptor plays a central part in myasthenia gravis.
Peripheral blood lymphocytes from one of three young female myasthenic patients responded to autologous thymocytes but not to receptor; peripheral blood lymphocytes from the other two responded to receptor but not to autologous thymocytes.
http://content.nejm.org/cgi/content/short/294/13/694   (232 words)

  
 Mechanism of nicotinic acetylcholine receptor cluster formation by rapsyn -- Ramarao and Cohen 95 (7): 4007 -- ...
The Agrin/MuSK Signaling Pathway Is Spatially Segregated from the Neuregulin/ErbB Receptor Signaling Pathway at the Neuromuscular Junction
Metabolic Stabilization of Muscle Nicotinic Acetylcholine Receptor by Rapsyn
Rapsyn Escorts the Nicotinic Acetylcholine Receptor Along the Exocytic Pathway via Association with Lipid Rafts
http://www.pnas.org/cgi/content/abstract/95/7/4007   (1067 words)

  
 Characterization of Muscarinic Acetylcholine Receptor in Rat Sertoli Cells -- Borges et al. 142 (11): 4701 -- ...
This study was designed to characterize muscarinic acetylcholine receptors
Orth JM 1986 FSH-stimulated Sertoli cell proliferation in the developing rat is modified by ß-endorphin produced in the testis.
1-adrenergic receptor subtypes in human corpus cavernosum tissue and in cultured trabecular smooth muscle cells.
http://endo.endojournals.org/cgi/content/full/142/11/4701   (6583 words)

  
 OriGene - Antibodies - Muscarinic Acetylcholine Receptor M4
Muscarinic acetylcholine receptor M4 has been reported to be expressed in many regions of the rat brain, particu
The clinical relevance of this receptor is unknown.
However, mouse studies have linked it to adenylyl cyclase inhibition.
http://www.origene.com/antibody/TA200234.aspx   (182 words)

  
 Acetylcholine Receptor Pathway
View a Shockwave™ Animation of an Acetylcholine Receptor Pathway.
The sight, smell, and taste of food cause salivation and the stimulation of the vagus nerve to release acetylcholine.
When acetylcholine binds to its receptor, the parietal cell's permeability to calcium ions (Ca) is altered so that the ions move into the cell.
http://www.gerd.com/intro/noframe/arp.htm   (173 words)

  
 A Mutational Analysis of the Acetylcholine Receptor Channel Transmitter Binding Site -- Akk et al. 76 (1): 207 -- ...
Mutagenesis and single-channel kinetic analysis were used to investigate the roles of four acetylcholine receptor channel
Toward a structural basis for the function of nicotinic acetylcholine receptors and their cousins.
This pattern of effects is not consistent with a simple electrostatic
http://www.biophysj.org/cgi/content/full/76/1/207   (5143 words)

  
 NEJM -- Thymus cells in myasthenia gravis selectively enhance production of anti-acetylcholine-receptor antibody by ...
We investigated the role of the thymus in 16 patients with myasthenia gravis without thymoma by studying the production of anti-acetylcholine-receptor antibody by thymic and blood lymphocytes cultured alone or together.
These results suggest that myasthenic thymus contains cell-bound acetylcholine-receptor-like material or specific T cells (or both) that can aid receptor-antibody production.
Receptor-antibody production by autologous blood lymphocytes was enhanced by the addition of responders' thymic cells, irradiated to abrogate antibody production and suppression (P less than 0.01).
http://content.nejm.org/cgi/content/abstract/305/22/1313   (237 words)

  
 Acetylcholine Receptor Pore
The structure of the acetylcholine receptor pore is described by:
Miyazawa A, Fujiyoshi Y, Unwin N. (2003) "Structure and gating mechanism of the acetylcholine receptor pore." Nature 424: 949 PubMed [1OED.pdb]
The energetic cost of removing water with apolar side chains in this pore would be prohibitive.
http://www.bio.cmu.edu/Courses/BiochemMols/Channels/1oed.htm   (450 words)

  
 Image Of The Week - Nicotinic Acetylcholine Receptor
Some members of this family of receptors in the brain bind nicotine and are targets for the addictive activity of this drug.
The electrostatic isopotential surface--a surface representing constant electric potential--for a model of the nicotinic acetylcholine receptor.
The model was developed by Igor Tsigelny, Naoya Sugiyama, and Palmer Taylor at the Departments of Pharmacology and Chemistry/Biochemistry at the University of California, San Diego, in collaboration with Steven M. Sine at the Mayo Foundation in Rochester, Minnesota.
http://www.sdsc.edu/IOTW/week19.96/iotw.html   (240 words)

  
 Formation of the Nicotinic Acetylcholine Receptor Binding Sites -- Green and Wanamaker 18 (15): 5555 -- Journal of ...
Expression of Soluble Ligand- and Antibody-binding Extracellular Domain of Human Muscle Acetylcholine Receptor alpha Subunit in Yeast Pichia pastoris.
Determinants Responsible for Assembly of the Nicotinic Acetylcholine Receptor
The Role of Palmitoylation in Functional Expression of Nicotinic {alpha}7 Receptors
http://www.jneurosci.org/cgi/content/abstract/18/15/5555   (493 words)

  
 Phylogenetic conservation of disulfide-linked, dimeric acetylcholine receptor pentamers in southern ocean electric rays ...
that this mechanism for receptor clustering is unique to acetylcholine
Its conservation suggests that the mechanism for the observed
Intact acetylcholine receptors have been purified on a novel
http://jeb.biologists.org/cgi/content/abstract/207/20/3581   (248 words)

  
 Random Mutagenesis of the M3 Muscarinic Acetylcholine Receptor Expressed in Yeast: IDENTIFICATION OF POINT MUTATIONS ...
sites in GPCRs that are critically involved in receptor function.
mutant receptor to function in a fashion similar to the wild-type
This strategy should be generally applicable to identify
http://www.jbc.org/cgi/content/abstract/278/32/30248   (490 words)

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