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Related Concept Videos

Factors Affecting Drug Response: Overview01:21

Factors Affecting Drug Response: Overview

When it comes to infants and young children, they are typically administered smaller doses of medication in comparison to adults. This is primarily because their organ functions still need to fully develop, meaning their bodies are not as efficient at metabolizing or eliminating drugs. Additionally, their blood-brain barrier is more permeable than in adults. As a result, high concentrations of drugs can easily penetrate the central nervous system (CNS), potentially leading to neurological...
Factors Affecting Drug Biotransformation: Biological01:19

Factors Affecting Drug Biotransformation: Biological

Biological factors significantly impact drug metabolism, influencing drug clearance, efficacy, and potential toxicity.
Species differences: Variations in enzyme systems across species can cause disparities in drug metabolism. For instance, humans may metabolize certain drugs faster than rodents, altering therapeutic effects.
Strain differences: Genetic variations within a species can result in differing enzyme activity, impacting drug response and toxicity. For example, some mouse strains may...
Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry01:20

Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry

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...
Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu01:29

Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu

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...
Tissue-Drug Binding: Localization of Drugs and its Significance01:24

Tissue-Drug Binding: Localization of Drugs and its Significance

Body tissues, comprising approximately 40% of the body weight, are crucial in drug distribution and localization. These tissues can serve as drug storage sites, competing with plasma binding sites for drug molecules.
Drugs can bind to different tissue components, enhancing their distribution and localization. The factors influencing drug localization in tissues include the drug's lipophilicity, structural characteristics, tissue perfusion rate, and pH differences. These factors determine the...
Pharmacogenetics of Drug Metabolism: Overview01:27

Pharmacogenetics of Drug Metabolism: Overview

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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Sex Stratified Neuronal Cultures to Study Ischemic Cell Death Pathways
10:44

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Published on: December 9, 2013

Sex differences in drug disposition.

Offie P Soldin1, Sarah H Chung, Donald R Mattison

  • 1Department of Oncology, Georgetown University Medical Center, Washington, DC 20057, USA. os35@georgetown.edu

Journal of Biomedicine & Biotechnology
|March 16, 2011
PubMed
Summary
This summary is machine-generated.

Sex differences in physiology, hormones, and genetics influence disease and drug response. Understanding these variations is crucial for developing sex-specific, effective medical treatments.

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Area of Science:

  • Pharmacology
  • Sex Differences
  • Clinical Medicine

Background:

  • Biological variations between males and females impact health outcomes.
  • Physiological, hormonal, and genetic factors influence disease susceptibility and progression.
  • These differences necessitate tailored therapeutic strategies.

Purpose of the Study:

  • To summarize key sex differences affecting drug disposition.
  • To compare clinical pharmacology in men and women.
  • To highlight the importance of sex as a biological variable in drug development.

Main Methods:

  • Literature review of studies on sex-based pharmacological differences.
  • Analysis of clinical pharmacology data stratified by sex.
  • Synthesis of current understanding of sex-specific drug effects.

Main Results:

  • Significant sex-based variations exist in drug absorption, distribution, metabolism, and excretion.
  • These pharmacokinetic differences can lead to altered drug efficacy and toxicity.
  • Clinical pharmacology reveals distinct responses to various therapies between sexes.

Conclusions:

  • Acknowledging and integrating sex as a biological variable is essential for precision medicine.
  • Tailoring drug therapies based on sex can improve treatment safety and effectiveness.
  • Further research is needed to fully elucidate sex-specific mechanisms in drug disposition and response.