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Cytokines influence mRNA expression of cytochrome P450 3A4 and MDRI in intestinal cells

P M Bertilsson1, P Olsson, K E Magnusson

  • 1Department of Health and Environment, Division of Medical Microbiology, Linköping, University, S-581 85 Linköping, Sweden. petbe@ihm.liu.se

Journal of Pharmaceutical Sciences
|April 5, 2001
PubMed

Insights

Inflammation and infection can alter drug bioavailability by affecting drug metabolism and transport. This study shows how cytokines and macrophages impact intestinal drug permeability and transporter expression.

Area of Science:

  • Pharmacology
  • Cell Biology
  • Gastroenterology

Background:

  • Inflammation and infection can influence drug bioavailability.
  • Mechanisms include altered drug metabolism, intestinal permeability, and transporter activity.
  • P-glycoprotein (Pgp) is a key efflux transporter affected by these conditions.

Purpose of the Study:

  • To investigate the effects of proinflammatory cytokines and macrophages on intestinal drug transport.
  • To assess changes in the expression of CYP3A4 and MDR1 (multidrug resistance gene, coding for Pgp) mRNA.
  • To evaluate the impact on Caco-2 cell layer permeability and transepithelial electrical resistance (TEER).

Main Methods:

  • Utilized the Caco-2 cell line as a model for intestinal epithelium.
  • Exposed cells to proinflammatory cytokines and macrophages.
  • Measured sodium fluorescein flux to assess cell layer permeability.
  • Monitored mRNA expression of CYP3A4 and MDR1.
  • Measured transepithelial electrical resistance (TEER).

Main Results:

  • Proinflammatory cytokines and macrophages decreased CYP3A4 mRNA expression.
  • MDR1 mRNA expression (coding for Pgp) was increased by these treatments.
  • Cell layer permeability, measured by sodium fluorescein flux, increased significantly.
  • Effects on TEER varied across different treatments.

Conclusions:

  • Inflammation and infection induce cellular responses impacting drug bioavailability.
  • Key effects include reduced CYP3A4 expression, increased epithelial permeability, and enhanced Pgp-mediated transport.
  • These changes can lead to altered drug efficacy and safety profiles.

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