Integerrima A-E, phenylethanoid glycosides from the stem of Callicarpa integerrima.

Area of Science:

• Natural Product Chemistry
• Pharmacology
• Medicinal Chemistry

Background:

• Callicarpa integerrima is a plant with potential medicinal properties.
• Phenylethanoid glycosides are a class of natural compounds with diverse biological activities.

Purpose of the Study:

• To isolate and characterize new phenylethanoid glycosides from Callicarpa integerrima.
• To evaluate the cytotoxic, anti-adipogenic, and antioxidant activities of the isolated compounds.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Structure elucidation via extensive spectroscopic analyses (NMR, MS).
• In vitro assays for cytotoxicity (MTT assay), anti-adipogenesis (lipid droplet staining), and antioxidant capacity (FRAP assay).

Main Results:

• Five new phenylethanoid glycosides, integerrima A-E (1-5), were identified.
• Compounds 1-5 were non-toxic to normal hepatocytes (LO-2) and pre-adipocytes (3T3-L1) and promoted hepatocyte proliferation.
• Integerrima A (1), C (3), and D (4) showed moderate cytotoxicity against hepatoma cells (Bel-7402).
• Integerrima D (4) significantly inhibited lipid droplet formation in 3T3-L1 cells.
• Integerrima E (5) demonstrated remarkable antioxidant activity.

Conclusions:

• The isolated phenylethanoid glycosides from Callicarpa integerrima possess significant hepatoprotective, anti-adipogenic, and antioxidant potential.
• These compounds warrant further investigation for therapeutic applications in liver diseases and metabolic disorders.