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for: agonism (disambiguation)

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An agonist is a term used to describe a type of ligand or drug that binds and alters the activity of a receptor. The ability to alter the activity of a receptor, also known as the agonist's efficacy is a property that distinguishes it from antagonists, a type of receptor ligand which also bind a receptor but which do not alter the activity of the receptor. The efficacy of an agonist may be positive, causing an increase in the receptor's activity or negative causing a decrease in the receptor's activity.

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The Agonist

Thoughtful, global, and timely blogs and diaries on a variety of topics including current events, war, art, and society.www.agonist.org/

diaries | The Agonist

ACS Blog. The Arabist. Blah 3. Booman Tribune. Corrente Wire. Disturbing Trends. Drudge Retort ... rights reserved by Sean Paul Kelley, Agonist Intermedia, Inc. ...agonist.org/diaries

Agonist — Blogs, Pictures, and more on WordPress

Tranzyme release Phase IIb results with Ghrelin Agonist, TZP-101, for Postoperative Ileus (POI) ... Aryx announce favorable QT results with 5HT4 agonist ATI-7505 ...en.wordpress.com/tag/agonist/

Andrea on Radio Agonist ! Yes you can listen online | DMI Blog

... to listen to the show archived at The Agonist blog later on though. ... The Agonist. The Albany Project. The Bonddad Blog. Culture Kitchen. The Daily Gotham ...www.dmiblog.com/archives/2006/12/andrea_on_radio_agonist_yes...

Society Blogs > Politics > Agonist Details

Bloggapedia is a blog directory, blog search engine and a social network for bloggers. ... Agonist. http://www.agonist.org. Blog author: Description: ...www.bloggapedia.com/Blog/Agonist-2880

Wikipedia About Agonist

for: agonism (disambiguation)

Agonist.png

An agonist is a term used to describe a type of ligand or drug that binds and alters the activity of a receptor. The ability to alter the activity of a receptor, also known as the agonist's efficacy is a property that distinguishes it from antagonists, a type of receptor ligand which also bind a receptor but which do not alter the activity of the receptor. The efficacy of an agonist may be positive, causing an increase in the receptor's activity or negative causing a decrease in the receptor's activity.

Types

Full agonists bind (have affinity for) and activate a receptor, displaying full efficacy at that receptor. One example of a drug that acts as a full agonist is isoproterenol which mimics the action of adrenaline at β adrenoreceptors. Another example is morphine, which mimics the actions of endorphins at μ-opioid receptors throughout the central nervous system.

Partial agonists (such as buspirone, aripiprazole, buprenorphine, or norclozapine) also bind and activate a given receptor, but have only partial efficacy at the receptor relative to a full agonist.

An inverse agonist is an agent which binds to the same receptor binding-site as an agonist for that receptor and reverses constitutive activity of receptors. Inverse agonists exert the opposite pharmacological effect of a receptor agonist.

A co-agonist works with other co-agonists to produce the desired effect together. NMDA receptor activation requires the binding of both of its glutamate and glycine co-agonists. An antagonist blocks a receptor from activation by agonists.

A selective agonist is selective for one certain type of receptor. It can additionally be of any of the aforementioned types.

A physiological agonist is a substance that creates the same bodily responses, but does not bind to the same receptor.

Receptors can be activated or inactivated either by endogenous (such as hormones and neurotransmitters) or exogenous (such as drugs) agonists and antagonists, resulting in stimulating or inhibiting a biological response. To see how an agonist may activate a receptor see this link

New findings that broaden the conventional definition of pharmacology demonstrate that ligands can concurrently behave as agonist and antagonists at the same receptor, depending on effector pathways. Terms that describe this phenomenon are "functional selectivity" or "protean agonism".

Potency

The potency of an agonist is usually defined by its EC50 value. This can be calculated for a given agonist by determining the concentration of agonist needed to elicit half of the maximum biological response of the agonist. Elucidating an EC50 value is useful for comparing the potency of drugs with similar efficacies producing physiologically similar effects. The lower the EC50, the greater the potency of the agonist the lower the concentration of drug that is required to elicit the maximum biological response

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News about Agonist

Parkinson’s Therapies Convey Similar Outcomes

Psych CentralPatients with early Parkinson’s disease appear to have similar overall levels of disability and quality of life six years after beginning treatment with either levodopa or a dopamine agonist. However, persistent differences are seen in some effects of these medications, including motor symptoms, fluid build-up and sleepiness. Individuals with Parkinson’s disease are believed to have a depleted...http://psychcentral.com/news/2009/03/10/parkinsons-therapies...

Schering-Plough's Investigational Oral Thrombin Receptor Antagonist Meets Primary Endpoint in a Newly Published Study

PR Newswire via Yahoo! Finance Tracked Antiplatelet Agent Showed No Increase in TIMI Major and Minor Bleeding and was Well Tolerated When Given With Standard Platelet Therapyhttp://biz.yahoo.com/prnews/090312/ny83105.html?.v=1

Arena Pharmaceuticals Announces Fourth Quarter and Full Year 2008 Financial Results

PR Newswire via Yahoo! Finance Arena Pharmaceuticals, Inc. today reported financial results for the fourth quarter and full year ended December 31, 2008.http://biz.yahoo.com/prnews/090312/la83059.html?.v=1

Athersys Reports Fourth Quarter and 2008 Annual Results

GlobeNewswire via Yahoo! Finance CLEVELAND, March 12, 2009 -- Athersys, Inc. today announced its financial results for the fourth quarter of 2008 and for the year ended December 31, 2008.http://biz.yahoo.com/pz/090312/161259.html

Parkinson's disease treatment strategies appear to have similar long-term effects on disability

EurekAlert!Patients with early Parkinson disease appear to have similar overall levels of disability and quality of life six years after beginning treatment with either levodopa or a dopamine agonist, according to a report posted online today that will appear in the May print issue of Archives of Neurology, one of the JAMA/Archives journals. However, persistent differences are seen in some effects of these ....http://www.eurekalert.org/pub_releases/2009-03/jaaj-pdt03050...

News about Agonist

3M lands deal with sanofi-aventis

Minneapolis-St Paul Business JournalMaplewood-based 3M signed a license agreement with Sanofi Pasteur, a division of Bridgewater, N.J.-based sanofi-aventis Group (NYSE: SNY). 3M (NYSE: MMM) will provide sanofi pasteur with its toll-like receptor agonist compounds, which help recognize ... http://twincities.bizjournals.com/twincities/stories/2008/10...

New Data Demonstrates SYMBICORT TURBUHALER SMART Reduces Exacerbations ...

Medical News Today ... Additional new data showed that budesonide/formoterol maintenance and reliever therapy also reduces the risk of asthma exacerbations and rate of hospital/ER visits compared to a fixed higher dose of inhaled corticosteroid/long-acting beta2-agonist ... http://www.medicalnewstoday.com/articles/124689.php

News tips from the Journal of Neuroscience

Genetic Engineering NewsSubtype Specificity of an Allosteric mAChR Agonist Carrie K. Jones, Ashley E. Brady, Albert A. Davis, Zixiu Xiang, Michael Bubser, Mohammed Noor Tantawy, Alexander S. Kane, Thomas M. Bridges, J. Phillip Kennedy, Stefania R. Bradley, Todd E. Peterson, Mhttp://www.genengnews.com/news/bnitem.aspx?name=43148948

News Review From Harvard Medical School -- Drug Doesn't Stop Lung ...

InteliHealthBeta agonist bronchodilators improve air flow by relaxing the airways. They include short-acting albuterol (Proventil, Ventolin) and long-acting salmeterol (Serevent). These two types of drugs also are offered in combination inhalers. Advair is one ... http://www.intelihealth.com/IH/ihtIH/WSIHW000/24479/36146/83...

Circassia Gains Rights to Dopexamine from Ipsen to Aid in Patient ...

Genetic Engineering NewsToleroCare patients reportedly recovered quicker, staying in the hospital for 17.5 days on average compared with 29.5 days for those on standard therapy. Dopexamine is a beta2 adrenoceptor and dopamine receptor agonist, which is approved in Europe ... http://www.genengnews.com/news/bnitem.aspx?name=43194634

Search results for Agonist

Gonadotropin-releasing hormone agonist - Wikipedia, the free ...

A gonadotropin-releasing hormone agonist (GnRH agonist) is a synthetic peptide modeled after the hypothalamic neurohormone GnRH that interacts with the gonadotropin-releasing ... http://en.wikipedia.org/wiki/Gonadotropin-releasing_hormone_...

The Agonist | thoughtful, global, timely

There has been much debate about how the current financial crisis might affect the average person on "mainstreet" and today I got an idea of how deep and far it might reach.http://agonist.org/node?from=25

agonist - definition of agonist by the Free Online Dictionary ...

ag·o·nist   (g-n st) n. 1. One involved in a struggle or competition. 2. Physiology A contracting muscle that is resisted or counteracted by another muscle, the antagonist.http://www.thefreedictionary.com/agonist

agonist - Definitions from Dictionary.com

noun . 1. a person engaged in a contest, conflict, struggle, etc., esp. the protagonist in a literary work. 2. a person who is torn by inner conflict.http://dictionary.reference.com/browse/agonist

agonist - Wiktionary

molecule that can combine with a receptor on a cellhttp://en.wiktionary.org/wiki/agonist
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Answers for Agonist

<3What is the agonist and the antagonist of Index Finger Extension?<3Agonist: Extensor indicis (origin: posterior surface of ulna, insertion: extensor expansion of index finger)HOTPWhat is meant by the term 'agonist affinity'?HOTPAn agonist is anything that binds to a receptor and stimulates a response. Affinity describes how strong the binding is. EC50 is the concentration of agonist/drug that results in 50% of the maxi...Stacy GWhen treating acid reflux, what is the difference between a cholinergic agonist and an adrenergic agonist?Stacy GDouglas Garipiprazole is the best Dopamine partial agonist to treat psychosis?Douglas GThere is usually no "best" medication for a given disorder since people react differently to meds and experience different side effects. For instance, aripiprazole may be very effective for one perso...ScienceBugHow often do you have to have GnRH agonist in IVF treatment?ScienceBugIt is daily - how long depends on the plan your doctor gives you. Here's a good sample - http://www.advancedfertility.com/sampleivfcalendar.htm
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