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Related Concept Videos

Indirect-Acting Cholinergic Agonists: Pharmacological Actions01:30

Indirect-Acting Cholinergic Agonists: Pharmacological Actions

Indirect-acting cholinergic agonists, also known as anticholinesterases, exert their pharmacological effects by enhancing cholinergic transmission in various body parts, including the neuromuscular junction, autonomic cholinergic synapses, and the brain.
At the neuromuscular junction, these agents work by inhibiting the breakdown of acetylcholine, allowing it to remain bound to the receptor and bind to nearby receptors. This process leads to repetitive firing of the endplate, causing muscle...
Direct-Acting Cholinergic Agonists: Therapeutic Uses01:11

Direct-Acting Cholinergic Agonists: Therapeutic Uses

Direct-acting cholinergic agonists have many therapeutic uses in various medical fields. Choline esters, including acetylcholine, have limited clinical utility due to their non-selectivity and short duration of action. Still, acetylcholine and carbachol are applied topically during ophthalmologic surgery to induce miosis. Pilocarpine, a muscarinic and ganglionic stimulator, effectively treats open-angle glaucoma and alleviates xerostomia and dry mouth caused by radiotherapy or Sjögren syndrome.
Direct-Acting Cholinergic Agonists: Pharmacological Actions00:59

Direct-Acting Cholinergic Agonists: Pharmacological Actions

Direct-acting cholinergic agonists exert their pharmacological actions by mimicking the effects of acetylcholine on postsynaptic muscarinic receptors to generate parasympathetic responses. These agents elicit a range of physiological responses, including cardiovascular effects. For example, activation of muscarinic receptors induces bradycardia, decreased cardiac output, reduced peripheral resistance, and consequent hypotension. In the eye, stimulation of M3 receptors leads to smooth muscle...
Direct-Acting Cholinergic Agonists: Pharmacokinetics01:31

Direct-Acting Cholinergic Agonists: Pharmacokinetics

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...
Cholinergic Antagonists: Therapeutic Uses01:26

Cholinergic Antagonists: Therapeutic Uses

Antimuscarinic drugs have various therapeutic applications by inhibiting parasympathetic stimulation in different systems. Here are the key therapeutic uses of antimuscarinics:    
Respiratory Tract: Ipratropium, aclidinium, and tiotropium treat asthma, chronic bronchitis, and chronic obstructive pulmonary disease (COPD). They protect against bronchoconstriction caused by irritants like cigarette smoke, sulfur dioxide, and ozone. They also help reduce nasopharyngeal secretions in common...
Cholinergic Antagonists: Pharmacokinetics01:24

Cholinergic Antagonists: Pharmacokinetics

Cholinergic antagonists—such as antimuscarinics—are available in oral, topical, ocular, parenteral, and inhalational formulations. Most antimuscarinics are oral formulations,  while scopolamine is available as a topical patch, and ipratropium and tiotropium are available as inhalation aerosols or powders. Atropine, tropicamide, and cyclopentolate are topically instilled in the eye. Most antimuscarinics are lipid-soluble and readily absorbed from the gastrointestinal tract and the conjunctiva.

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Related Experiment Video

Updated: May 19, 2026

Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation
09:52

Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation

Published on: February 23, 2020

Cholinergic involvement and manipulation approaches in multiple system disorders.

K Ofek1, H Soreq

  • 1The Edmond and Lily Safra Center for Brain Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.

Chemico-Biological Interactions
|August 18, 2012
PubMed
Summary

Manipulating acetylcholine signaling, via cholinesterase activity, impacts autonomic functions, inflammation, and brain states like anxiety and depression. This offers therapeutic potential for neurodegenerative diseases.

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A Computerized Test Battery to Study Pharmacodynamic Effects on the Central Nervous System of Cholinergic Drugs in Early Phase Drug Development
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Last Updated: May 19, 2026

Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation
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Published on: February 23, 2020

A Computerized Test Battery to Study Pharmacodynamic Effects on the Central Nervous System of Cholinergic Drugs in Early Phase Drug Development
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A Computerized Test Battery to Study Pharmacodynamic Effects on the Central Nervous System of Cholinergic Drugs in Early Phase Drug Development

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Area of Science:

  • Neuroscience
  • Autonomic Nervous System
  • Biochemistry

Background:

  • Acetylcholine signaling is crucial for cognitive, immune, and autonomic functions.
  • Cholinergic parameters, including cholinesterase activity and gene expression, exhibit individual variability and change with age and BMI.
  • Acetylcholine influences inflammation and stress responses, impacting brain states such as anxiety, depression, and pain.

Purpose of the Study:

  • To explore the significance of manipulating cholinergic parameters for autonomic system modulation.
  • To investigate the role of acetylcholine in inflammation and its connection to neurological disorders.
  • To highlight the therapeutic potential of cholinergic manipulations in neurodegenerative diseases.

Main Methods:

  • Analysis of cholinesterase activities in body fluids.
  • Measurement of cholinergic gene transcript levels in blood leukocytes.
  • Review of existing literature on cholinergic impairments in neurological conditions.

Main Results:

  • Cholinesterase activity is influenced by age, BMI, gender, and ethnicity.
  • Acetylcholine in leukocytes inhibits pro-inflammatory cytokine production.
  • Cholinergic system dysregulation is implicated in Alzheimer's, Parkinson's, and post-stroke conditions.

Conclusions:

  • Modulating cholinergic parameters offers a promising avenue for treating autonomic dysfunction and neuroinflammation.
  • Understanding individual variability in cholinergic systems is key for personalized therapeutic strategies.
  • Cholinergic manipulations hold potential for managing symptoms in neurodegenerative diseases and related mood disorders.