Alkaloid Components From Orychophragmus violaceus and Their Ferroptosis Inhibition Activity

Area of Science:

• Phytochemistry
• Pharmacology
• Cell Biology

Background:

• Orychophragmus violaceus seeds are a source of bioactive compounds.
• Ferroptosis is an iron-dependent cell death pathway implicated in various diseases.
• Understanding the phytochemistry and pharmacological activities of O. violaceus can lead to new therapeutic agents.

Purpose of the Study:

• To isolate and elucidate the structures of new and known alkaloids from O. violaceus seeds.
• To evaluate the ferroptosis inhibition activity of the isolated alkaloids.
• To investigate the underlying mechanisms of ferroptosis inhibition by active compounds.

Main Methods:

• Isolation of alkaloids using chromatographic techniques.
• Structure elucidation through spectroscopic data analysis (NMR, MS) and Electronic Circular Dichroism (ECD) calculations.
• In vitro assessment of ferroptosis inhibition using human intestinal epithelial cells (HIEC-6) and erastin induction.
• Measurement of reactive oxygen species (ROS), Fe2+, lipid peroxide (LPO), and glutathione (GSH) levels.

Main Results:

• Three new alkaloids (1-3) and three known alkaloids (4-6) were successfully isolated and characterized.
• Compound 3 demonstrated specific inhibition of erastin-induced ferroptosis in HIEC-6 cells.
• Compound 3 significantly reduced erastin-induced ROS, Fe2+, and LPO accumulation.
• Compound 3 promoted glutathione (GSH) production, counteracting ferroptosis.

Conclusions:

• The study successfully identified novel alkaloids from O. violaceus seeds with significant ferroptosis inhibitory effects.
• Compound 3 exhibits promising therapeutic potential for conditions associated with ferroptosis.
• These findings contribute to the understanding of O. violaceus phytochemistry and its pharmacological relevance.