Photo-amygdalin: light-dependent control over hydrogen cyanide release and cytotoxicity

Area of Science:

• Natural Products Chemistry
• Photochemistry
• Medicinal Chemistry

Background:

• Amygdalin, found in bitter almonds and apricot seeds, releases toxic hydrogen cyanide (cyanogenesis) after hydrolysis.
• Its use in alternative cancer therapy is controversial due to uncontrolled cyanogenesis, posing safety risks.
• The inability to control amygdalin's release of cyanide limits its therapeutic potential.

Purpose of the Study:

• To design and develop a novel compound, photo-amygdalin, with light-triggered cyanogenesis.
• To create a controllable and potentially safer alternative to amygdalin for therapeutic applications.
• To investigate the efficacy of photo-amygdalin in reducing cancer cell viability.

Main Methods:

• Synthesis of photo-amygdalin, inspired by the molecular structure of amygdalin.
• Demonstration of light-induced hydrogen cyanide release using a myoglobin test.
• Assessment of photo-amygdalin's cytotoxicity against a human cell line upon irradiation.

Main Results:

• Photo-amygdalin successfully releases hydrogen cyanide upon visible light irradiation.
• Irradiation of photo-amygdalin significantly reduces human cell line viability.
• The compound proved to be 100-fold more potent than potassium cyanide in reducing cell viability.

Conclusions:

• Photo-amygdalin offers a controllable method for cyanide release, addressing the limitations of traditional amygdalin.
• Light-triggered cyanogenesis presents a promising strategy for developing safer and more effective therapeutic agents.
• The enhanced potency and controllability of photo-amygdalin warrant further investigation for potential anticancer applications.