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Related Concept Videos

Pharmacogenetics and Pharmacogenomics: Overview01:29

Pharmacogenetics and Pharmacogenomics: Overview

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Pharmacogenetics and pharmacogenomics examine how genetic factors influence an individual's response to drugs. While pharmacogenetics focuses on the impact of specific genetic variants on drug effects, pharmacogenomics takes a broader approach, studying how genetic variation across populations contributes to differences in drug responses. These fields aim to explain why individuals may experience varying levels of efficacy or adverse reactions to the same medication.Variability in drug...
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Principles of Pharmacogenetics: Types of Genetic Variants01:27

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The human genome is over 99.9% identical between individuals, yet genetic differences exist at millions of bases. The human genome contains approximately 3 million variant positions per individual, many of which are heterozygous, contributing to genetic diversity and individual traits. Genetic variations include single-nucleotide polymorphisms (SNPs), insertions, deletions, and copy number variations (CNVs).SNPs, the most common variation, involve single-base changes in DNA. These can be...
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Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu01:29

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Genetic variations significantly influence drug response through pharmacokinetics, receptor interactions, and biologic milieu modifications. Pharmacokinetic alterations impact drug metabolism and clearance, affecting efficacy and toxicity. Variants in drug-metabolizing enzymes, such as CYP2C9 and CYP2C19, alter drug activation and elimination. For example, CYP2C9 loss-of-function variants require lower warfarin doses to prevent excessive bleeding, while CYP2C19 variants reduce clopidogrel...
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Pharmacodynamics is a scientific field that delves into drugs' intricate biochemical, cellular, and physiological effects on the human body. The study of pharmacodynamics helps us understand how drugs interact with the body and elicit various responses.
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Pharmacogenomics: Identification of New Drug Targets01:29

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Advances in genomics have profoundly influenced drug discovery by increasing both the speed and accuracy of pharmaceutical development. Pharmacogenomics, which examines how genetic variation influences drug response, facilitates the identification of novel therapeutic targets and enables patient stratification for personalized treatment. These strategies contribute to improved drug efficacy, minimized adverse effects, and more efficient clinical trial design.Mapping genetic differences...
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Pharmacogenetics of Drug Metabolism: Overview01:27

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Genetic polymorphism in drug metabolism is crucial to the inter-individual variability observed in drug responses. Drug metabolism primarily involves the chemical modification of drugs and other xenobiotics to enhance their elimination by increasing their polarity. Two main classes of enzymes mediate this biotransformation process: Phase I enzymes, primarily cytochrome P450s, catalyze oxidation and reduction reactions, while other enzymes, such as esterases, mediate hydrolysis, and Phase II...
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Updated: Feb 25, 2026

Laser-scanning Photostimulation of Optogenetically Targeted Forebrain Circuits
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Optogenetics and pharmacogenetics: principles and applications.

Jingwei Jiang1,2, Huxing Cui1,2,3, Kamal Rahmouni4,2,3

  • 1Department of Pharmacology, University of Iowa Carver College of Medicine, Iowa City, Iowa.

American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
|August 11, 2017
PubMed
Summary
This summary is machine-generated.

Optogenetics and chemogenetics offer precise control over neuronal activity using light or designer drugs. These powerful neuroscience tools advance our understanding of brain function and its role in health and disease.

Keywords:
light-sensitive ion channelsmodified G protein-coupled receptorsneuronal activity

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Genetics

Background:

  • Precise spatiotemporal control of neuronal activity is crucial for understanding brain function and regulating physiological processes.
  • Optogenetics and chemogenetics have emerged as revolutionary tools for achieving this control.

Purpose of the Study:

  • To discuss the fundamental elements of optogenetics and chemogenetics.
  • To highlight their applications in advancing neuroscience research.

Main Methods:

  • Optogenetics: Utilizes light-sensitive ion channels (e.g., channelrhodopsins) engineered from bacteria to modulate neuronal activity with light.
  • Chemogenetics: Employs engineered G protein-coupled receptors activated by specific small molecules (e.g., DREADDs) for remote neuronal control.

Main Results:

  • These techniques allow for selective and bidirectional modulation of defined neuronal populations with high specificity.
  • Significant advances have been made in deciphering nervous system function and its influence on physiological processes.

Conclusions:

  • Optogenetics and chemogenetics are powerful toolboxes enabling unprecedented progress in neuroscience.
  • Their applications extend to understanding and potentially treating various conditions related to nervous system function.