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Unsymmetrical Bisacridines' Interactions with ABC Transporters and Their Cellular Impact on Colon LS 174T and

Monika Pawłowska1, Jolanta Kulesza1, Ewa Paluszkiewicz1

  • 1Department of Pharmaceutical Technology and Biochemistry, Faculty of Chemistry, Gdańsk University of Technology, Gabriela Narutowicza Str. 11/12, 80-233 Gdańsk, Poland.

Molecules (Basel, Switzerland)
|December 17, 2024
PubMed

Insights

Unsymmetrical bisacridines (UAs) are substrates for MDR1 but do not significantly alter ABC transporter expression. This suggests UAs may limit drug resistance, making them promising for future anticancer therapy research.

Area of Science:

  • Pharmacology
  • Molecular Biology
  • Cancer Research

Background:

  • Multidrug resistance (MDR) hinders effective cancer treatment.
  • Investigating novel compounds like unsymmetrical bisacridines (UAs) is crucial for overcoming MDR.
  • Understanding UA interaction with ABC transporters is key to their therapeutic potential.

Purpose of the Study:

  • To determine if UAs are substrates for ABC transporters (MDR1, MRP1, MRP2).
  • To assess the impact of UAs on the expression of ABC transporter genes and proteins.
  • To evaluate the cytotoxicity and cellular response of UAs in human colon (LS 174T) and prostate (DU 145) cancer cells.

Main Methods:

  • ATPase activity assays using insect Sf9 cell vesicles expressing ABC transporters.
  • Gene expression analysis via quantitative PCR (qPCR).
  • Protein level analysis using Western blotting.
  • Cytotoxicity assessment via MTT assays.
  • Cell cycle and apoptosis analysis using flow cytometry.
  • Cellular response observation using fluorescence microscopy.

Main Results:

  • UAs were identified as substrates for MDR1.
  • UAs did not significantly affect the expression of ABCB1, ABCC1, and ABCC2 genes or MDR1 and PXR protein levels.
  • LS 174T cells showed lower cytotoxicity and apoptosis induction by UAs compared to DU 145 cells, potentially due to higher metabolic enzyme expression.

Conclusions:

  • UAs are recognized by MDR1 but do not induce significant changes in transporter expression.
  • The limited impact on drug resistance mechanisms suggests UAs could be valuable in cancer therapy.
  • UAs show potential as candidates for further investigation in anticancer drug development.
Keywords:
ABC transportersanticancer agentscellular responsecolon and prostate cancer cell linescytotoxicitymultidrug resistance (MDR)unsymmetrical bisacridines

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