Fluorinated N,N-dialkylaminostilbenes for Wnt pathway inhibition and colon cancer repression

Area of Science:

• Oncology
• Molecular Biology
• Medicinal Chemistry

Background:

• Colorectal cancer (CRC) is a leading cause of cancer mortality, often driven by mutations in APC or β-catenin genes.
• These mutations lead to the stabilization of β-catenin, constitutively activating Wnt/β-catenin target genes and promoting cancer.
• Natural stilbenes like resveratrol and pterostilbene inhibit Wnt signaling but require high concentrations ( > 10 microM) for efficacy.

Purpose of the Study:

• To investigate the structure-activity relationship of stilbene derivatives for enhanced Wnt signaling inhibition.
• To develop novel, more efficacious Wnt inhibitors for colorectal cancer treatment.

Main Methods:

• Synthesis and evaluation of a panel of fluorinated N,N-dialkylaminostilbenes.
• Assessment of Wnt signaling inhibition in colorectal cancer cells.
• In vivo testing of lead compounds in human CRC cell xenografts in athymic nude mice.

Main Results:

• A synthesized compound, (E)-4-(2,6-difluorostyryl)-N,N-dimethylaniline (4r), demonstrated potent Wnt signaling inhibition at nanomolar concentrations.
• Compound 4r effectively inhibited the growth of human CRC cell xenografts in mice at a dosage of 20 mg/kg.
• The fluorinated stilbenes appear to act downstream of β-catenin, likely impacting Wnt signaling at the transcriptional level.

Conclusions:

• Fluorinated N,N-dialkylaminostilbenes represent a promising class of compounds for colorectal cancer therapy.
• Compound 4r exhibits significantly improved efficacy compared to natural stilbene derivatives.
• Further research into these compounds could lead to novel therapeutic strategies for Wnt-driven cancers.