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Related Concept Videos

In Vitro Drug Release Testing: Overview, Development and Validation01:10

In Vitro Drug Release Testing: Overview, Development and Validation

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In vitro dissolution and drug release tests assess how quickly and how much of a drug is released from its dosage form into an aqueous medium under standardized laboratory conditions. These tests are essential tools in pharmaceutical development and quality assurance, offering insight into the drug's performance before clinical use.During formulation development, dissolution testing identifies incomplete or inconsistent drug release issues. It also supports decisions on selecting the optimal...
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Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test01:22

Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test

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In clinical practice, the direct measurement of hepatic blood flow to evaluate liver function presents significant challenges due to the intricate and specialized nature of the necessary techniques. Consequently, healthcare professionals often rely on empirical estimates derived from thorough patient examinations and liver function tests to gauge liver health. Among the tools at their disposal, the Child–Pugh and MELD scoring systems stand out for their ability to categorize and assess...
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Methods for Studying Drug Absorption: In vitro01:16

Methods for Studying Drug Absorption: In vitro

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In vitro experiments are crucial for understanding the transport and absorption of drugs through biological materials. These studies employ varied methods such as the diffusion cell method, the everted sac technique, and the everted ring technique.
The diffusion cell method uses a two-compartment cell, including a donor compartment with the drug solution, which simulates the environment where the drug is applied, and a receptor compartment with a buffer solution, which simulates the environment...
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In Vitro Drug Dissolution: Alternative Methods01:17

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Alternative drug dissolution methods include the rotating bottle, intrinsic dissolution test, peristalsis, and the Franz diffusion cell method. The rotating bottle method involves meticulously rotating tightly capped controlled-release beads in a temperature-controlled bath. Periodic decanting of samples allows for residue assay, followed by refilling with fresh medium and testing at various pH levels to emulate the gastrointestinal tract conditions.In contrast, the intrinsic dissolution test...
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Effect of Hepatic Disease on Pharmacokinetics: Drug Dosing and Hepatic Blood Flow01:26

Effect of Hepatic Disease on Pharmacokinetics: Drug Dosing and Hepatic Blood Flow

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Chronic liver disease significantly impacts drug metabolism due to alterations in hepatic blood flow and enzyme accessibility. This disruption affects the body's pharmacokinetics—the movement and processing of drugs within the system. Key enzymes crucial for metabolizing medications become less accessible, changing how drugs are processed and utilized. Furthermore, liver disease influences the synthesis of plasma proteins, such as albumin and globulins, which play critical roles in drug...
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Drug Product Performance: In Vitro–In Vivo Correlation01:20

Drug Product Performance: In Vitro–In Vivo Correlation

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In pharmaceutical development, it's crucial to establish a predictive in vitro–in vivo correlation (IVIVC) for two or more formulations to gain a comprehensive understanding of release properties. IVIVC reduces the need for costly in vivo studies and facilitates the establishment of meaningful dissolution specifications with significant cost savings and decreased regulatory burden. Furthermore, a meaningful IVIVC should predict Cmax and AUC within 20%, aligning with FDA guidance while...
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Related Experiment Video

Updated: Jan 4, 2026

Human Liver Microphysiological System for Assessing Drug-Induced Liver Toxicity In Vitro
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Liver microsystems in vitro for drug response.

Jyong-Huei Lee1, Kuan-Lun Ho1, Shih-Kang Fan2

  • 1Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan.

Journal of Biomedical Science
|October 30, 2019
PubMed
Summary

Engineered liver microsystems mimic in vivo conditions for advanced drug screening. These biomimetic platforms enhance the study of drug hepatotoxicity and interactions in vitro.

Keywords:
Cell micropatterningDrug responseEngineered liver microsystemsHydrogel biofabricationMicrofluidic perfusion

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Area of Science:

  • Biomedical Engineering
  • Hepatology
  • Drug Discovery

Background:

  • Traditional in vitro drug screening methods often fail to accurately predict in vivo responses.
  • Liver microsystems aim to replicate the complex cellular architecture and microenvironment of the native liver.
  • Accurate prediction of drug metabolism and toxicity is crucial for pharmaceutical development.

Purpose of the Study:

  • To review engineering approaches for developing advanced liver microsystems.
  • To highlight the application of these microsystems in studying drug hepatotoxicity, drug-drug interactions, metabolic function, and enzyme induction.
  • To discuss the challenges and future trends in liver microsystem technology for in vitro drug response studies.

Main Methods:

  • Cell micropatterning techniques (e.g., soft lithography, dielectrophoresis) to control cell arrangement.
  • Hydrogel biofabrication (e.g., photolithography, micromolding, 3D bioprinting) for creating biomimetic extracellular matrices.
  • Microfluidic perfusion systems to establish controlled microenvironments and cell cocultures.

Main Results:

  • Engineered liver microsystems successfully recapitulate in vivo-like cellular arrangements and microenvironments.
  • These systems enable sensitive, high-throughput, and biomimetic drug screening.
  • Demonstrated ability to incorporate coculture with non-parenchymal cells and heterogeneous extracellular matrices.

Conclusions:

  • Liver microsystems offer a powerful in vitro tool for comprehensive drug evaluation.
  • Advancements in engineering are crucial for overcoming current limitations and enhancing predictive power.
  • Further development of liver microsystems will significantly impact pharmaceutical research and drug development.