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Related Concept Videos

Antiasthma Drugs: Methylxanthines01:24

Antiasthma Drugs: Methylxanthines

Theophylline, a member of the methylxanthine class of bronchodilators, has long been used in asthma management. While its exact mechanism of action is not fully understood, it is believed to have multiple effects on various cellular processes.
Theophylline is thought to inhibit phosphodiesterase enzymes, increasing intracellular levels of cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP). This rise in cAMP and cGMP concentrations stimulates cardiac function,...
Adrenergic Agonists: Mixed-Action Agents01:28

Adrenergic Agonists: Mixed-Action Agents

Mixed-action adrenergic agonists, like ephedrine and pseudoephedrine, directly and indirectly affect adrenergic receptors. These agents stimulate adrenoceptors and indirectly release stored neurotransmitters, amplifying the adrenergic response.
Ephedrine and pseudoephedrine lack a catecholamine group, making them less susceptible to degradation by metabolic enzymes. They have increased oral bioavailability and lipophilicity, resulting in a longer duration of action. Their response is reduced by...
Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs01:25

Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs

Asthma is a chronic respiratory condition for which new therapeutic avenues, including anti-inflammatory drugs like mast cell stabilizers and anti-IgE treatments, continue to be developed.
Mast cell stabilizers, such as cromolyn (also known as sodium cromoglycate) and nedocromil (Tilade), are effective drugs in asthma management. These stabilizers hinder histamine release by skillfully obstructing the activation of mast cells and other cellular entities. Notably, they navigate this task without...
Drugs Used in Lower Respiratory Disorders: Overview01:17

Drugs Used in Lower Respiratory Disorders: Overview

Lower respiratory tract disorders present challenges that often require skilled and nuanced approaches for effective management. Common ailments, such as asthma and chronic obstructive pulmonary disease (COPD), have prompted the development of intricate treatment strategies involving bronchodilators and anti-inflammatory drugs, each tailored to ease breathing and revitalize the lungs.
Bronchodilators, the first step of respiration enhancement, come in various forms, each with its own mechanism...
Antiasthma Drugs: Muscarinic Receptor Antagonists01:20

Antiasthma Drugs: Muscarinic Receptor Antagonists

Muscarinic receptor antagonists, also known as antimuscarinic agents, are a class of bronchodilators used to treat asthma, although they are more commonly used to treat COPD. They work by inhibiting the action of acetylcholine (ACh), a neurotransmitter, on muscarinic receptors found in the airways.
Antimuscarinic agents compete with ACh for the same binding site on the muscarinic receptors. By binding to these receptors, they inhibit the downstream effects of ACh and block the parasympathetic...
Cholinergic Antagonists: Pharmacological Actions01:28

Cholinergic Antagonists: Pharmacological Actions

Antimuscarinic drugs block muscarinic receptors in multiple systems, including the gut, eye, smooth muscles, respiratory tract, cardiovascular, and central nervous systems. They produce similar effects with varying selectivity depending on the specific agent and tissue. Here are the key pharmacological actions of antimuscarinics:
Gastrointestinal Effects: Antimuscarinics reduce gut contractions, increase gastric emptying, and slow intestinal transit. They partly inhibit gastric acid secretion...

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Related Experiment Video

Updated: Jun 8, 2026

Advanced Imaging of Lung Homing Human Lymphocytes in an Experimental In Vivo Model of Allergic Inflammation Based on Light-sheet Microscopy
10:39

Advanced Imaging of Lung Homing Human Lymphocytes in an Experimental In Vivo Model of Allergic Inflammation Based on Light-sheet Microscopy

Published on: April 16, 2019

Methylxanthines and inflammatory cells.

György Haskó1, Bruce Cronstein

  • 1Department of Surgery, University of Medicine and Dentistry of New Jersey, New Jersey Medical School, Newark, NJ 07103, USA.

Handbook of Experimental Pharmacology
|September 23, 2010
PubMed
Summary

Methylxanthines like caffeine and theophylline regulate inflammation through multiple pathways. These compounds block adenosine receptors and activate histone deacetylase, with higher doses also inhibiting phosphodiesterases to reduce inflammation.

Related Experiment Videos

Last Updated: Jun 8, 2026

Advanced Imaging of Lung Homing Human Lymphocytes in an Experimental In Vivo Model of Allergic Inflammation Based on Light-sheet Microscopy
10:39

Advanced Imaging of Lung Homing Human Lymphocytes in an Experimental In Vivo Model of Allergic Inflammation Based on Light-sheet Microscopy

Published on: April 16, 2019

Area of Science:

  • Pharmacology
  • Immunology
  • Molecular Biology

Background:

  • Caffeine and theophylline are widely used methylxanthines.
  • Inflammatory responses are complex biological processes.
  • Understanding the molecular mechanisms of methylxanthines is crucial for therapeutic applications.

Purpose of the Study:

  • To elucidate the diverse mechanisms by which methylxanthines modulate inflammatory responses.
  • To investigate the roles of adenosine receptor blockade and histone deacetylase activation in methylxanthine-mediated effects.
  • To explore the impact of phosphodiesterase inhibition and cyclic adenosine monophosphate elevation at higher methylxanthine concentrations.

Main Methods:

  • Review of existing pharmacological and molecular data on methylxanthines.
  • Analysis of studies investigating adenosine receptor blockade.
  • Examination of research on histone deacetylase activation and phosphodiesterase inhibition by methylxanthines.

Main Results:

  • At pharmacologically relevant concentrations, methylxanthines primarily exert anti-inflammatory effects via adenosine receptor blockade and histone deacetylase activation.
  • Higher concentrations of methylxanthines lead to inflammation suppression through phosphodiesterase inhibition.
  • Inhibition of phosphodiesterases results in elevated intracellular cyclic adenosine monophosphate (cAMP) levels, contributing to reduced inflammation.

Conclusions:

  • Methylxanthines, including caffeine and theophylline, regulate inflammation through a multi-faceted mechanism.
  • Adenosine receptor blockade and histone deacetylase activation are key at typical doses.
  • Phosphodiesterase inhibition and subsequent cAMP increase represent an additional anti-inflammatory pathway at higher concentrations.