Modulation of multidrug efflux pump activity by new hydantoin derivatives on colon adenocarcinoma cells without

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Gabriella Spengler1, Jadwiga Handzlik, Imre Ocsovszki

  • 1Institute of Medical Microbiology and Immunobiology, Faculty of Medicine, University of Szeged, Dóm tér 10, H-6720 Szeged, Hungary. gspengler@ihmt.unl.pt

Anticancer Research
|October 4, 2011
PubMed
Abstract

Insights

New hydantoin derivatives show promise as potent efflux pump inhibitors (EPIs) for anticancer chemotherapy. These compounds effectively inhibit P-glycoprotein (ABCB1) in multidrug-resistant colon cancer cells without inducing apoptosis.

Area of Science:

  • Oncology
  • Pharmacology
  • Biochemistry

Background:

  • Hydantoin derivatives are explored for enhancing anticancer chemotherapy efficacy.
  • Previous studies showed eight hydantoin derivatives inhibit P-glycoprotein (ABCB1) efflux pumps and synergize with doxorubicin.
  • ABCB1 overexpression is a key mechanism in multidrug resistance (MDR) in cancer.

Purpose of the Study:

  • To evaluate the efficacy of novel hydantoin derivatives as ABCB1 efflux pump inhibitors (EPIs).
  • To investigate their activity in a multidrug-resistant colon carcinoma cell model.
  • To determine if these compounds affect apoptosis pathways.

Main Methods:

  • Testing hydantoin derivatives in sensitive (Colo 205/S) and resistant (Colo 320/R) colon carcinoma cell lines.
  • Assessing ABCB1 transporter inhibition activity.
  • Comparing efficacy against a positive control (verapamil).

Main Results:

  • BS-1, MN-3, and JH-63 demonstrated significant ABCB1 transporter inhibition in Colo 320/R cells at 4 mg/l.
  • These derivatives were more effective than the positive control, verapamil.
  • No induction of apoptosis was observed in Colo 320/R cells treated with the derivatives.

Conclusions:

  • The evaluated hydantoin derivatives are potent efflux pump inhibitors (EPIs).
  • These compounds effectively inhibit ABCB1 in multidrug-resistant colon cancer cells.
  • The hydantoin derivatives do not interfere with apoptosis signaling pathways, suggesting a targeted mechanism of action.

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