Identification of a novel chalcone derivative that inhibits Notch signaling in T-cell acute lymphoblastic leukemia

Area of Science:

• Oncology
• Molecular Biology
• Medicinal Chemistry

Background:

• Notch signaling is a key therapeutic target in cancers with Notch gain-of-function mutations, such as T-cell acute lymphoblastic leukemia (T-ALL).
• Current Notch-blocking agents have limitations, including variable efficacy and significant side effects, necessitating novel therapeutic strategies.

Purpose of the Study:

• To identify and synthesize novel small molecules with Notch inhibitory activity.
• To evaluate the anti-leukemic effects of a novel chalcone derivative (compound 8) in T-ALL models.

Main Methods:

• Screening of a natural product library to identify lead compounds.
• Design and synthesis of chalcone derivatives, including compound 8.
• Functional and biological analysis of compound 8's effects on Notch signaling, cell cycle, and apoptosis in T-ALL cell lines.

Main Results:

• Compound 8 demonstrated potent Notch inhibitory activity at low micromolar concentrations in T-ALL cell lines.
• Structure-activity relationships were established for the chalcone scaffold.
• Short-term treatment with compound 8 dose-dependently reduced Notch signaling, arrested cell cycle progression, and induced apoptosis, inhibiting leukemia cell growth.

Conclusions:

• Compound 8 is a novel Notch inhibitor with significant anti-leukemic activity in preclinical T-ALL models.
• Compound 8 warrants further investigation as a potential therapeutic agent for Notch-dependent cancers.
• The chalcone scaffold represents a promising structural basis for developing new anti-cancer drugs targeting Notch signaling.