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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.
Such synergistic combinations...
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Microorganisms in Medicine and Therapeutics01:29

Microorganisms in Medicine and Therapeutics

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Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.
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Dose-Response Relationship: Overview01:03

Dose-Response Relationship: Overview

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Agonists can bind with and activate receptors, resulting in the formation of drug-receptor complexes. Once formed, these complexes catalyze many biochemical processes at the cellular level and subsequently induce a pharmacologic response. The degree of response is directly proportional to the fraction of activated receptors, which in turn, depends on the concentration of the drug at the receptor site as well as the sensitivity of the receptor. An increase in the administered dose contributes to...
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Agonism and Antagonism: Quantification01:14

Agonism and Antagonism: Quantification

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When drugs are administered, they can elicit either an agonist or antagonist effect on the body. Agonism occurs when a drug activates a specific receptor, triggering a biological response. On the other hand, antagonism happens when a drug binds to the same receptors but blocks their activation, thereby preventing a biological response.
To quantify these effects, researchers use a dose-response curve, which provides valuable information about the potency and efficacy of a drug. Potency refers to...
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Pharmacokinetics: Drug–Drug Interactions01:25

Pharmacokinetics: Drug–Drug Interactions

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Drug interactions occur when the pharmacological effect of one drug is altered by another substance, either enhancing or diminishing its activity. The drug whose activity is altered is known as the object drug, and the substance causing the alteration is called the agent drug or the precipitant. The net effects of these interactions are mostly undesirable, leading to decreased effectiveness or increased adverse effects. In rare cases, interactions can be beneficial, such as the enhanced...
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Combined Effects of Drugs: Antagonism01:30

Combined Effects of Drugs: Antagonism

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The combined effects of drugs can result in various interactions, of which an important type is antagonism. Antagonism is a mechanism where one drug inhibits or counteracts the effects of another drug. Antagonism can occur through various means, including receptor binding, allosteric modulation, functional interaction, chemical reactions, and pharmacokinetic processes.
The most common type is receptor antagonism, where one drug acts as an antagonist to block the effects of another drug by...
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Related Experiment Video

Updated: Oct 10, 2025

Diagonal Method to Measure Synergy Among Any Number of Drugs
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Combinatorial, additive and dose-dependent drug-microbiome associations.

Sofia K Forslund1,2,3,4,5,6, Rima Chakaroun7, Maria Zimmermann-Kogadeeva1

  • 1Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany.

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|December 9, 2021
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Medications significantly alter the gut microbiome and host features more than cardiometabolic disease itself. Combined drug therapies can improve metabolome and microbiome health, offering new insights into drug-host-microbiome interactions.

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Area of Science:

  • Microbiome research
  • Pharmacogenomics
  • Metabolomics

Background:

  • Cardiometabolic disease progression is linked to altered gut microbiome and metabolome.
  • Heavy medication use in patients complicates biomarker discovery.
  • Understanding drug effects on host-microbiome interactions is crucial.

Purpose of the Study:

  • To disentangle the effects of drugs versus disease on host and gut microbiome features.
  • To quantify the impact of single medications, combinations, and additive effects.
  • To identify drug-host-microbiome signatures in cardiometabolic disease.

Main Methods:

  • Integrated multi-omics analyses of 2,173 European residents (MetaCardis cohort).
  • Computational framework to infer drug effects on host and microbiome variability.
  • Quantification of medication effects, including combinations and additive impacts.

Main Results:

  • Drug effects on host and microbiome variability exceed those of disease.
  • Additive drug effects shift metabolome and microbiome towards a healthier state.
  • Antibiotic use correlates with microbiome changes associated with cardiometabolic disease severity.
  • Drug dosage shows a relationship with clinical marker improvement and microbiome composition.

Conclusions:

  • A computational framework is presented to disentangle drug and disease effects in multimedicated individuals.
  • Identified signatures offer new hypotheses for drug-host-microbiome interactions in cardiometabolic disease.
  • Medications play a significant role in shaping the host-microbiome axis during disease progression.