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Related Concept Videos

Bioavailability Enhancement: Determination and Conceptual Approaches in Overcoming Bioavailability Problems01:22

Bioavailability Enhancement: Determination and Conceptual Approaches in Overcoming Bioavailability Problems

Bioavailability is a critical pharmacological concept that measures the extent and rate at which an active drug ingredient or therapeutic moiety enters the systemic circulation, remaining unchanged. It's a pivotal factor in determining a drug's efficacy and safety.The Biopharmaceutics Classification System (BCS) plays an essential role in drug development by categorizing drugs into four classes based on their solubility and permeability. This classification aids in understanding drug absorption...
Modified-Release Drug Delivery Systems: Bioavailability01:30

Modified-Release Drug Delivery Systems: Bioavailability

Modified-release (MR) dosage forms are designed to extend drug release over time, thereby maintaining stable plasma concentrations and reducing dosing frequency. However, their bioavailability is typically below 100% due to incomplete drug release and presystemic metabolism, and limitations in drug permeability across the gastrointestinal epithelium, all of which can restrict the fraction of the drug reaching systemic circulation. Consequently, studying the in vivo bioavailability of MR...
Measurement of Bioavailability: Pharmacodynamic Methods01:20

Measurement of Bioavailability: Pharmacodynamic Methods

Pharmacodynamic methods provide insights into a drug's effects on physiological processes over time and play a crucial role in understanding bioavailability and therapeutic efficacy. These methods can be broadly classified into acute pharmacological and therapeutic response approaches, each with distinct mechanisms and applications.The acute pharmacological response method directly correlates a drug's physiological effects, such as ECG or pupil diameter changes, to its time course in the body.
Bioavailability: Influencing Factors01:22

Bioavailability: Influencing Factors

Bioavailability refers to the extent and rate at which a drug reaches systemic circulation in its active form. Extent refers to the amount of the drug that makes it into circulation, while rate is the speed at which it enters circulation. It is influenced by several factors critical for optimizing drug formulations, dosing regimens, and therapeutic outcomes.Physicochemical properties of drugs and formulationsThe solubility, stability, and dissolution rate of a drug significantly impact its...
Bioavailability Study Design: Absolute Versus Relative Bioavailability01:27

Bioavailability Study Design: Absolute Versus Relative Bioavailability

Bioavailability is a crucial pharmacokinetic parameter that quantifies the proportion of an administered drug that reaches the systemic circulation and is available for therapeutic action. Regulatory agencies mandate the assessment of bioavailability, typically measured as the area under the drug plasma concentration-versus-time curve (AUC), to ensure the efficacy and safety of pharmaceutical products. These evaluations are categorized as absolute and relative bioavailability studies.Absolute...
Bioavailability: Overview01:17

Bioavailability: Overview

Bioavailability refers to the proportion of an administered drug that reaches the systemic circulation in its active, unaltered form. It is a crucial pharmacokinetic parameter that determines the effectiveness of a drug in achieving its intended therapeutic outcomes. The route of administration significantly influences bioavailability, with intravenous administration achieving 100% bioavailability as the drug directly enters the bloodstream. In contrast, oral administration often results in...

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Related Experiment Video

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FIBS-enabled Noninvasive Metabolic Profiling
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Bloat free genetic programming: application to human oral bioavailability prediction.

Sara Silva1, Leonardo Vanneschi

  • 1INESC-ID Lisboa, IST/Technical University of Lisbon, Portugal. sara@kdbio.inesc-id.pt

International Journal of Data Mining and Bioinformatics
|January 30, 2013
PubMed
Summary

Predicting human oral bioavailability is crucial for drug discovery. This study enhances Genetic Programming (GP) with Operator Equalisation, showing improved prediction accuracy and discussing overfitting for practical GP application.

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Area of Science:

  • Computational chemistry
  • Pharmacokinetics
  • Drug discovery

Background:

  • Predicting human oral bioavailability is vital for efficient drug discovery.
  • Genetic Programming (GP) has demonstrated high performance in bioavailability prediction.
  • Existing GP methods may face challenges like bloat and overfitting.

Purpose of the Study:

  • To evaluate the impact of the Operator Equalisation bloat control method in Genetic Programming for human oral bioavailability prediction.
  • To assess the performance improvements offered by the latest GP developments.
  • To analyze the quality of GP-derived prediction models and compare them with prior results.

Main Methods:

  • Application of Genetic Programming (GP) with the Operator Equalisation technique.
  • Development and analysis of predictive models for human oral bioavailability.
  • Comparison of new GP model performance against existing benchmarks.

Main Results:

  • Demonstrated improvements in human oral bioavailability prediction using GP with Operator Equalisation.
  • Identification of specific model behaviors, including unexpected overfitting.
  • Qualitative analysis of generated GP solutions and their predictive power.

Conclusions:

  • Operator Equalisation offers advancements in GP for bioavailability prediction.
  • Overfitting requires careful consideration for practical GP implementation.
  • Further research can enhance the utility of GP in drug discovery workflows.