5-Arylidenerhodanines as P-gp Modulators: An Interesting Effect of the Carboxyl Group on ABCB1 Function in...

Area of Science:

• Medicinal Chemistry
• Molecular Pharmacology
• Cancer Biology

Background:

• Multidrug resistance (MDR) is a major challenge in cancer and antiviral chemotherapy, often mediated by efflux pumps like ABCB1.
• Inhibiting these efflux pumps is a key strategy to restore drug sensitivity in resistant cells.

Purpose of the Study:

• To synthesize and evaluate novel 5-arylidenerhodanine derivatives as inhibitors of the ABCB1 efflux pump.
• To assess the cytotoxic and antiproliferative effects of these compounds on T-lymphoma cancer cells.

Main Methods:

• Synthesis of a series of 5-arylidenerhodanine compounds.
• In vitro evaluation of ABCB1 efflux pump inhibition in mouse T-lymphoma cells.
• Cytotoxicity and antiproliferative assays.
• Molecular docking studies to predict binding modes.

Main Results:

• Several synthesized 5-arylidenerhodanines demonstrated potent inhibition of the ABCB1 efflux pump.
• Compounds with a triphenylamine moiety and carboxyl group were particularly effective, showing over 17-fold greater inhibition than verapamil.
• Compound 11 was identified as a highly potent P-gp inhibitor, with its binding mode elucidated through molecular docking.

Conclusions:

• The novel 5-arylidenerhodanine derivatives are promising candidates for overcoming MDR in cancer therapy.
• The amphiphilic nature and specific structural features (triphenylamine, carboxyl group) contribute to potent ABCB1 inhibition.
• Further investigation into these compounds could lead to new therapeutic strategies against drug-resistant cancers.