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Updated: Jun 15, 2026

High-throughput Quantitative Real-time RT-PCR Assay for Determining Expression Profiles of Types I and III Interferon Subtypes
10:00

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Regulation of drug transporter mRNA expression by interferon-γ in primary human hepatocytes

Marc Le Vee1, Elodie Jouan, Amélie Moreau

  • 1EA 4427 Signalisation et Réponse aux Agents Infectieux et Chimiques, Institut de Recherches en Santé Environnement Travail, Université de Rennes 1, Rennes, France.

Fundamental & Clinical Pharmacology
|March 5, 2010
PubMed

Insights

Interferon-gamma (IFN-γ) reduces key liver drug transporters, including influx and efflux proteins. This impairment may affect how the body processes medications during inflammation or viral infections.

Area of Science:

  • Hepatology
  • Pharmacology
  • Immunology

Background:

  • Interferon-gamma (IFN-γ) is known to decrease drug-metabolizing enzymes like cytochromes P-450 (CYPs) in liver cells.
  • Drug transporters are crucial for liver detoxification, influencing drug absorption and elimination.

Purpose of the Study:

  • To investigate the impact of IFN-γ on the expression of hepatic drug influx and efflux transporters.
  • To determine if IFN-γ affects the liver's drug transport system.

Main Methods:

  • Primary human hepatocytes were exposed to 10 ng/mL of IFN-γ.
  • Messenger RNA (mRNA) levels of various drug transporters were quantified.

Main Results:

  • IFN-γ significantly downregulated mRNA levels of sinusoidal influx transporters, including sodium-taurocholate cotransporting polypeptide and organic anion transporting polypeptides (OATP1B1, OATP1B3, OATP2B1).
  • IFN-γ also reduced the expression of efflux transporters, such as multidrug resistance gene 1, multidrug resistance proteins (MRP2, MRP3), breast cancer resistance protein, and bile salt export pump.

Conclusions:

  • IFN-γ suppresses the expression of major hepatic drug influx and efflux transporters.
  • This suppression may lead to reduced drug clearance in patients with inflammatory or viral conditions characterized by elevated IFN-γ levels.

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