Anti-inflammatory compounds from Ampelopsis cantoniensis

Area of Science:

• Natural Product Chemistry
• Pharmacology
• Immunology

Background:

• Natural products are explored for anti-inflammatory potential.
• Nitric oxide (NO) plays a key role in inflammatory diseases.
• Ampelopsis cantoniensis is a plant with potential medicinal properties.

Purpose of the Study:

• To evaluate the anti-inflammatory activity of chemical constituents from Ampelopsis cantoniensis leaves.
• To identify specific compounds responsible for nitric oxide inhibition.
• To investigate the mechanism of action in cellular models.

Main Methods:

• Isolation and identification of sixteen chemical compounds from A. cantoniensis leaves.
• Measurement of nitric oxide (NO) production in cell cultures.
• Assessment of inducible nitric oxide synthase (iNOS) expression.
• Determination of IC50 values for inhibitory compounds.

Main Results:

• Phloretin (compound 5) and 5,7,3',5'-tetrahydroxyflavanone (compound 16) demonstrated significant inhibition of NO production.
• Compound 5 had an IC50 of 5.2 μM, and compound 16 had an IC50 of 18.5 μM.
• Inhibition of NO production correlated with decreased levels of LPS-induced iNOS in RAW 264.7 cells.

Conclusions:

• This research provides the first evidence of anti-inflammatory properties in compounds isolated from A. cantoniensis leaves.
• Phloretin and 5,7,3',5'-tetrahydroxyflavanone exhibit potent anti-inflammatory effects by inhibiting NO production and iNOS expression.
• A. cantoniensis shows promise as a source for novel anti-inflammatory agents for treating inflammatory diseases.