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Related Concept Videos

Combined Effects of Drugs: Synergism01:27

Combined Effects of Drugs: Synergism

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Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
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Principles of Drug Action01:24

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Drugs are chemical substances that modify biological responses by interacting with macromolecular targets such as receptors, ion channels, transporters, and enzymes. Pharmacodynamics describes the course of action of drugs leading to the physiological effect at a specific site in the body.
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Factors Affecting Drug Biotransformation: Physicochemical and Chemical Properties of Drugs01:21

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A drug's physicochemical properties fundamentally influence its metabolism. For instance, a drug's molecular size and shape critically determine its interaction with enzymes and transporters — larger drugs may face difficulty reaching enzyme active sites, altering their metabolic pathways. The pKa of a drug, which establishes its ionization state, can impact its solubility and absorption, thereby influencing metabolism.
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Targets for Drug Action: Overview01:26

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Drugs target macromolecules to modify ongoing cellular processes. Primary drug targets include receptors, ion channels, transporters, and enzymes.
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Pharmaceutical substances known as xenobiotics are predominantly lipophilic and nonionized. This enables them to permeate lipid bilayers, such as cell membranes, and interact with intracellular target receptors. Lipophilic drugs have an advantage in crossing biological barriers and reaching their intended sites of action. However, lipophilic drugs often have a restricted capacity for renal expulsion or elimination from the body. When these drugs enter the kidneys and undergo glomerular...
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Orally administered drugs primarily enter the systemic circulation via passive diffusion through the intestinal membranes. The drug's absorption is influenced by drug stability in the gastrointestinal GI tract, membrane permeability, the surface area available for absorption, luminal drug concentration, and residence time in the lumen. Drug permeability can be enhanced by adjusting the lipophilicity, polarity, or molecular size of the drug, promoting its passive transport across intestinal...
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Updated: Jun 14, 2025

High Throughput Co-culture Assays for the Investigation of Microbial Interactions
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Microbes put drugs in(action).

Jennifer van der Laan1, Filipe Cabreiro2

  • 1CECAD, University of Cologne, Joseph-Stelzmann-Str. 26, Cologne 50931, North Rhine-Westphalia, Germany.

Trends in Endocrinology and Metabolism: TEM
|September 5, 2024
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Summary
This summary is machine-generated.

The gut microbiome influences drug effectiveness and host health. Harnessing these microbes offers a promising strategy for advancing precision medicine and improving therapeutic outcomes.

Keywords:
gut microbiomehost physiologypharmacology

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Area of Science:

  • Microbiology
  • Pharmacology
  • Host-Physiology

Background:

  • The gut microbiome plays a crucial role in host homeostasis.
  • Gut microbes significantly influence the metabolism and efficacy of host-targeted drugs.
  • Complex interactions exist between the gut microbiome, nutrients, drugs, and host physiology.

Purpose of the Study:

  • To explore the intricate relationship between the gut microbiome and drug efficacy.
  • To identify strategies for leveraging the gut microbiome to enhance therapeutic outcomes.
  • To advance the field of precision medicine through microbiome-targeted interventions.

Main Methods:

  • Review of existing literature on gut microbiome-drug interactions.
  • Analysis of host-microbe-drug metabolic pathways.
  • Exploration of computational and experimental approaches to modulate the gut microbiome.

Main Results:

  • Gut microbes can significantly alter the bioavailability and activity of various drugs.
  • Microbiome composition can predict individual responses to drug therapy.
  • Targeting the gut microbiome presents opportunities for personalized drug regimens.

Conclusions:

  • The gut microbiome is a critical factor in determining drug efficacy and patient response.
  • Harnessing the gut microbiome holds significant potential for improving drug therapy and advancing precision medicine.
  • Further research into microbiome-drug interactions is essential for clinical translation.