Bioactive prenylated acylphloroglucinols from Hypericum scabrum

Area of Science:

• Natural Product Chemistry
• Pharmacology
• Medicinal Chemistry

Background:

• Hypericum scabrum is a plant species with potential medicinal properties.
• Acylphloroglucinols are a class of natural compounds found in plants.
• Prenylated compounds often exhibit significant biological activities.

Purpose of the Study:

• To isolate and characterize prenylated acylphloroglucinols from Hypericum scabrum.
• To evaluate the cytotoxic and neuroprotective activities of these compounds.
• To explore the therapeutic potential of natural products from H. scabrum.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Structural elucidation via HRESIMS, 1D/2D NMR, DP4+, and ECD simulation.
• Cytotoxicity assays against Cal-27 cancer cells.
• Neuroprotection assays using PC12 cells against corticosterone-induced damage.

Main Results:

• Ten prenylated acylphloroglucinols were identified, including four novel compounds.
• Compounds 1-7 and 10 demonstrated moderate cytotoxicity against Cal-27 cells, with compound 1 being the most potent (IC50 = 21.29 µM).
• All tested compounds exhibited neuroprotective effects against corticosterone-induced damage in PC12 cells, with compound 9 showing the strongest activity.

Conclusions:

• Prenylated acylphloroglucinols from H. scabrum possess dual cytotoxic and neuroprotective properties.
• Compound 1 shows significant cytotoxic potential, while compound 9 demonstrates notable neuroprotective effects.
• These findings highlight the promise of H. scabrum-derived compounds for human health and therapeutic development.