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Related Concept Videos

Gap Junctions01:37

Gap Junctions

56.4K
Multicellular organisms employ a variety of ways for cells to communicate with each other. Gap junctions are specialized proteins that form pores between neighboring cells in animals, connecting the cytoplasm between the two, and allowing for the exchange of molecules and ions. They are found in a wide range of invertebrate and vertebrate species, mediate numerous functions including cell differentiation and development, and are associated with numerous human diseases, including cardiac and...
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Gap Junctions01:27

Gap Junctions

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The cytoplasm of adjacent animal cells can exchange small molecules, ions, and secondary messengers via the communication channels which form the gap junctions. These junctions comprise a few hundred to thousands of molecular channels, each made of two halves, called the connexon hemichannel. A connexon is a hexamer of six transmembrane connexin proteins, which assemble radially, thus forming a pore or channel in the center. One connexon hemichannel docks with a corresponding connexon on the...
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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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Liver Physiology01:30

Liver Physiology

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The liver, an essential organ in the human body, performs over 200 vital functions that can be broadly categorized into metabolic, hematological, endocrine regulation, and bile production.
Metabolic Regulation:
The liver is the central organ involved in regulating blood composition. It stabilizes blood glucose levels, maintaining them within the range of  70–110 mg/dL. When these levels drop, the liver breaks down glycogen reserves and releases glucose into the bloodstream. It can...
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Hepatic Drug Clearance: Role of Transporters01:14

Hepatic Drug Clearance: Role of Transporters

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In the liver and bile canaliculi, influx and efflux transporters modification can influence intrinsic clearance. Transporters play a significant role in moving drugs within liver cells. Elaborate models, such as the Biopharmaceutical Classification System (BCS), are essential to relate transporters to drug disposition. This system categorizes drugs into four classes based on solubility and permeability, providing insights into elimination routes and the effects of transporters following oral...
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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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Related Experiment Video

Updated: Dec 9, 2025

Bile Duct Ligation in Mice: Induction of Inflammatory Liver Injury and Fibrosis by Obstructive Cholestasis
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Bile Duct Ligation in Mice: Induction of Inflammatory Liver Injury and Fibrosis by Obstructive Cholestasis

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Cholestasis Differentially Affects Liver Connexins.

Axelle Cooreman1, Raf Van Campenhout1, Sara Crespo Yanguas1

  • 1Department of In Vitro Toxicology and Dermato-Cosmetology, Vrije Universiteit Brussel, 1090 Brussels, Belgium.

International Journal of Molecular Sciences
|September 10, 2020
PubMed
Summary
This summary is machine-generated.

Cholestatic liver disease impacts connexin protein production. Connexin32 (CX32) levels decreased, suggesting its potential as a biomarker for liver disease and toxicity.

Keywords:
cholestasisconnexinliver

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Bile Duct Ligation in Mice: Induction of Inflammatory Liver Injury and Fibrosis by Obstructive Cholestasis
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Murine Precision-Cut Liver Slices as an Ex Vivo Model of Liver Biology
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Murine Precision-Cut Liver Slices as an Ex Vivo Model of Liver Biology

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Area of Science:

  • Hepatology and Molecular Biology
  • Cellular Biology
  • Biochemistry

Background:

  • Connexins are crucial for maintaining liver tissue homeostasis.
  • Dysregulation of connexins is implicated in various liver diseases.
  • Understanding connexin responses to cholestasis is vital for disease management.

Purpose of the Study:

  • To investigate the impact of cholestatic liver disease on connexin26, connexin32, and connexin43 expression.
  • To evaluate the effects of cholestatic agents on connexin production in vivo and in vitro.

Main Methods:

  • Bile duct ligation in mice to induce cholestatic liver injury.
  • Exposure of human hepatoma HepaRG cells to cholestatic drugs and bile acids.
  • Assessment of mRNA and protein levels, and in situ immunostaining for connexins.

Main Results:

  • Cholestasis differentially affected connexin26 and connexin43 expression.
  • A consistent decrease in connexin32 production was observed across experimental models.
  • Connexin32 downregulation was noted in both in vivo and in vitro settings.

Conclusions:

  • Connexin32 expression is significantly repressed during cholestatic liver injury.
  • Connexin32 may serve as a reliable biomarker for liver disease and drug-induced toxicity.
  • Further research into connexin32's role in liver pathology is warranted.