The Natural Alkaloid (-)-N-Hydroxyapiosporamide Suppresses Colorectal Tumor Progression as an NF-κB Pathway Inhibitor...

Area of Science:

• Natural product chemistry
• Molecular oncology
• Pharmacology

Background:

• Colorectal cancer (CRC) presents a significant therapeutic challenge due to declining effective treatments.
• Natural products offer a valuable resource for novel anticancer drug discovery.
• The alkaloid (-)-N-hydroxyapiosporamide (NHAP) has demonstrated antitumor potential, but its specific role in CRC was previously undefined.

Purpose of the Study:

• To elucidate the antitumor target and mechanism of NHAP in colorectal cancer.
• To evaluate NHAP as a potential therapeutic lead compound for CRC treatment.

Main Methods:

• In vitro biochemical assays to assess cytotoxicity and apoptosis.
• In vivo animal models to evaluate tumor growth inhibition and toxicity.
• Analysis of the NF-κB signaling pathway, including protein-protein interactions.

Main Results:

• NHAP demonstrated significant cytotoxicity against CRC cells, inducing both apoptosis and autophagic cell death.
• NHAP effectively inhibited the NF-κB signaling pathway by disrupting the TAK1-TRAF6 complex interaction.
• NHAP significantly suppressed CRC tumor growth in vivo with no apparent toxicities and favorable pharmacokinetic properties.

Conclusions:

• NHAP is identified as a novel inhibitor of the NF-κB pathway with potent in vitro and in vivo antitumor activity against colorectal cancer.
• This study clarifies NHAP's molecular mechanism against CRC, establishing it as a promising lead compound for future therapeutic development.