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Related Concept Videos

Cholinergic Antagonists: Chemistry and Structure-Activity Relationship01:29

Cholinergic Antagonists: Chemistry and Structure-Activity Relationship

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Cholinergic antagonists bind to cholinergic receptors and limit the effects of acetylcholine and other cholinergic agonists. Based on the specific cholinergic receptor affinity, these antagonists are classified as muscarinic or nicotinic. Anticholinergics interrupt parasympathetic innervations while sympathetic innervations remain uninterrupted. Muscarinic antagonists are also called 'muscarinic antagonists', 'antimuscarinics', or 'parasympatholytics'. Nicotinic...
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Indirect-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship01:29

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Indirect-acting cholinergic agonists are agents that interact with the acetylcholinesterase enzyme in the synaptic cleft, preventing the breakdown of acetylcholine into choline and acetate. Consequently, the concentration of acetylcholine in the synaptic cleft increases. These agonists can be classified into reversible and irreversible inhibitors based on their duration of action.
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Direct-Acting Cholinergic Agonists: Chemistry and Structure-Activity Relationship01:22

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Cholinergic agonists or cholinomimetics mimic the action of acetylcholine to stimulate the parasympathetic nervous system. They are categorized into direct-acting and indirect-acting agents. The direct-acting cholinergic drugs induce the parasympathetic response by directly binding to the muscarinic or nicotine receptors. In comparison, the indirect-acting cholinergic drugs prevent acetylcholine hydrolysis, indirectly contributing to the extended parasympathetic response.
The direct-acting...
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Indirect-Acting Cholinergic Agonists: Pharmacokinetics01:22

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Indirect-acting cholinergic agonists, or anticholinesterases, enhance the body's cholinergic activity by inhibiting acetylcholine's breakdown. They are categorized as reversible or irreversible agents based on their mechanism of action. They are further classified into short-acting, intermediate-acting, and long-acting agents based on their duration of action.
Reversible agents containing quaternary amines, such as neostigmine and edrophonium, are not easily absorbed orally because they...
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Adrenergic Agonists: Chemistry and Structure-Activity Relationship01:16

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Adrenergic agonists' structure-activity relationship (SAR) determines their selectivity and efficacy. These agonists comprise a phenylethylamine moiety with an aromatic ring and an ethylamine side chain.
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Separation of...
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Direct-Acting Cholinergic Agonists: Pharmacokinetics01:31

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Direct-acting cholinergic agonists, such as synthetic choline esters and naturally occurring alkaloids, exert their effects by enhancing the actions of acetylcholine and stimulating the parasympathetic nervous system. Synthetic choline esters share structural similarities with acetylcholine. For example, they have a positively charged quaternary ammonium or onium group, contributing to their hydrophilic characteristics. As a result, they are poorly absorbed in the body through oral...
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Related Experiment Video

Updated: Apr 12, 2026

Cellular Membrane Affinity Chromatography Columns to Identify Specialized Plant Metabolites Interacting with Immobilized Tropomyosin Kinase Receptor B
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Five new bioactive compounds from Chenopodium ambrosioides.

Kun Song1, Jian Zhang, Peng Zhang

  • 1a State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College , Beijing 100050 , China.

Journal of Asian Natural Products Research
|May 23, 2015
PubMed
Summary

Researchers isolated five new compounds from Chenopodium ambrosioides, with three showing moderate antioxidant and anti-inflammatory effects. These findings contribute to understanding the plant's medicinal potential.

Keywords:
ChenopodiaceaeChenopodium ambrosioidesanti-inflammatory activityantioxidant activitychenopodiumamines A–Dchenopodiumoside A

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Area of Science:

  • Natural Product Chemistry
  • Pharmacology

Background:

  • Chenopodium ambrosioides is a plant with a history of traditional medicinal use.
  • Investigating its chemical constituents can reveal novel bioactive molecules.

Purpose of the Study:

  • To isolate and characterize new bioactive compounds from Chenopodium ambrosioides.
  • To evaluate the antioxidant and anti-inflammatory potential of isolated compounds.

Main Methods:

  • Extraction of plant material using ethanol.
  • Structure elucidation using UV, IR, HR-ESI-MS, and NMR spectroscopy.
  • In vitro assays for antioxidant and anti-inflammatory activities.

Main Results:

  • Five new compounds were identified: chenopodiumamines A-D (1-4) and chenopodiumoside A (5).
  • Compounds 1-3 demonstrated moderate antioxidant activity.
  • Compounds 1-3 also exhibited moderate anti-inflammatory activity.

Conclusions:

  • The study successfully isolated and characterized novel compounds from Chenopodium ambrosioides.
  • Compounds 1-3 possess promising antioxidant and anti-inflammatory properties, warranting further investigation.