Antidiabetic Polyphenolic Compounds Including Two Unique Dimers Featuring a 6/6/7/6/5 Ring System from the Roots of...

Area of Science:

• Natural Product Chemistry
• Pharmacology

Background:

• Sophora tonkinensis is a traditional medicinal herb.
• Identifying bioactive compounds from natural sources is crucial for drug discovery.

Purpose of the Study:

• To isolate and characterize novel compounds from Sophora tonkinensis roots.
• To evaluate the potential of these compounds in improving insulin sensitivity.

Main Methods:

• Isolation and purification of compounds using chromatographic techniques.
• Structure elucidation via spectroscopic analysis (NMR, MS) and quantum chemical calculations.
• In vitro assays for PTP1B inhibition and insulin sensitivity enhancement (HepG2 cell glucose consumption).

Main Results:

• Four new compounds were isolated: sotodisoflavanones A and B (1, 2) and shandougenines C and D (3, 4).
• Compounds 1, 5, 6, and 7 demonstrated significant PTP1B inhibition with IC50 values ranging from 0.88 to 2.70 μM.
• These compounds enhanced insulin sensitivity by increasing glucose consumption in HepG2 cells.

Conclusions:

• Sophora tonkinensis roots contain novel polyphenolic compounds with PTP1B inhibitory activity.
• These compounds show promise for developing new therapeutic agents for diabetes management by improving insulin sensitivity.