Pharmaceutical Research

, Volume 25, Issue 9, pp 1991–2001

Cyclooxygenase Inhibitors Down Regulate P-glycoprotein in Human Colorectal Caco-2 Cell Line

Authors

    • Université Paris-sud XI, Faculté de PharmacieLaboratoire de Pharmacie Clinique
    • IFR 141Université Paris-sud XI
  • Robert Farinotti
    • Université Paris-sud XI, Faculté de PharmacieLaboratoire de Pharmacie Clinique
    • IFR 141Université Paris-sud XI
    • Hôpital Pitié SalpetrièreService de Pharmacie, Assistance Publique-Hopitaux de Paris
  • Marion Buyse
    • Université Paris-sud XI, Faculté de PharmacieLaboratoire de Pharmacie Clinique
    • IFR 141Université Paris-sud XI
Research Paper

DOI: 10.1007/s11095-008-9596-1

Cite this article as:
Zrieki, A., Farinotti, R. & Buyse, M. Pharm Res (2008) 25: 1991. doi:10.1007/s11095-008-9596-1

Abstract

Purpose

Elevated expression of the ABC transporters P-glycoprotein (P-gp), and breast cancer resistance protein (BCRP) seems to correlate with multidrug resistance of cancer cells. In this study we investigated the effect of COX inhibitors in modulating P-gp and BCRP expression and P-gp activity in Caco-2 cells.

Methods

mRNA and protein expression of MDR1 and BCRP were evaluated by real time PCR and western blot respectively. The activity of P-gp was measured by intracellular accumulation of rhodamine123 or 3H-Digoxin.

Results

The chronic exposure of Caco-2 to indomethacin heptyl ester (indo HE) (0.4 μM) or nimesulide (10 μM) (selective COX-2 inhibitors) and naproxen (6 μM) (non selective inhibitor COX-1/COX-2) significantly decreased the expression and activity of P-gp. In contrast, the acute treatment by nimesulide and naproxen did not modify these parameters while indo HE treatment (48–72 h) caused a protein decrease and a functional inhibition of P-gp. Unexpectedly, the short-term treatment with naproxen induced an important increase of BCRP expression, but this induction was lost after long-term treatment. No modification of BCRP expression was observed after indo HE or nimesulide treatment.

Conclusion

Our observations suggest a possible down regulation of P-gp by COX inhibitors, which may enhance the accumulation of chemotherapy agents.

KEY WORDS

BCRPCaco-2COX-2 inhibitorMDR1P-gp

Copyright information

© Springer Science+Business Media, LLC 2008