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Related Concept Videos

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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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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Liver Regeneration01:24

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The liver is an important organ in vertebrates that plays an essential role in metabolism. It is also responsible for storing and redistributing nutrients such as carbohydrates, fats, and vitamins in the body. Additionally, the liver releases bile salts which are critical for digesting food and eliminating toxic metabolites from the body.
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Effect of Hepatic Disease on Pharmacokinetics: Drug Dosing and Hepatic Blood Flow01:26

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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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Physiological Pharmacokinetic Models: Incorporating Hepatic Transporter-Mediated Clearance01:07

Physiological Pharmacokinetic Models: Incorporating Hepatic Transporter-Mediated Clearance

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Drug transporters are critical in drug absorption, distribution, and excretion processes. They should be included in physiological-based pharmacokinetic (PBPK) models, which help predict human drug disposition. However, predicting this is challenging during drug development, especially when liver transport is involved. However, with a realistic representation of body transport processes, an accurate model may be possible.
A recent model describes pravastatin's hepatobiliary excretion,...
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Hepatic Portal System01:21

Hepatic Portal System

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The hepatic portal system, a critical part of our circulatory framework, transports nutrient-laden, deoxygenated blood from the gastrointestinal tract and spleen to the liver. This ingenious system plays an indispensable role in maintaining our body's metabolic equilibrium.
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Related Experiment Video

Updated: Nov 19, 2025

Rat Model of the Associating Liver Partition and Portal Vein Ligation for Staged Hepatectomy ALPPS Procedure
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PPARs in liver physiology.

Alexandre Berthier1, Manuel Johanns1, Francesco Paolo Zummo1

  • 1Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, 59000 Lille, France.

Biochimica Et Biophysica Acta. Molecular Basis of Disease
|February 1, 2021
PubMed
Summary
This summary is machine-generated.

Peroxisome proliferator-activated receptors (PPARs) regulate energy balance and inflammation. New research reveals complex PPAR regulation influenced by cell type, time of day, sex, and species differences in liver physiology.

Keywords:
Circadian rhythmLiverPPARsPhysiologySexual dimorphismZonation

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Area of Science:

  • Molecular Biology
  • Metabolic Research
  • Hepatology

Background:

  • Peroxisome proliferator-activated receptors (PPARs) are key nuclear receptors regulating energy homeostasis.
  • PPARs influence lipid and glucose metabolism, and emerging evidence links them to inflammatory responses.
  • Understanding PPARs is vital for metabolic and inflammatory disease research.

Purpose of the Study:

  • To provide an overview of recent advances in PPAR research within liver physiology.
  • To highlight complex and previously overlooked regulatory aspects of PPARs.
  • To emphasize the role of PPARs in cellular heterogeneity, circadian rhythms, and species-specific functions.

Main Methods:

  • Review of recent scientific literature.
  • Analysis of data from technological advances like single-cell RNA sequencing.
  • Focus on emerging research areas in PPAR regulation.

Main Results:

  • PPAR regulation is more complex than previously understood, involving tissular zonation and cellular heterogeneity.
  • Circadian rhythms, sexual dimorphism, and species-specific features significantly impact PPAR activity.
  • Single-cell RNA sequencing reveals novel insights into PPAR signaling pathways.

Conclusions:

  • PPARs play a multifaceted role in liver physiology beyond traditional metabolic functions.
  • Novel regulatory mechanisms including zonation, heterogeneity, and circadian control are critical for PPAR function.
  • Further research into these complex regulatory aspects is essential for understanding PPARs in health and disease.