Identifying Active Compounds in Cnidii Fructus Against Ulcerative Colitis: Integration of Chromatographic Analysis,...

Area of Science:

• Pharmacology
• Natural Products Chemistry
• Immunology

Background:

• Cnidii Fructus (CF) is a traditional Chinese medicine with known immune-modulating properties.
• Its specific bioactive constituents and mechanisms for treating ulcerative colitis (UC) remain underexplored.
• Ulcerative colitis (UC) is a chronic inflammatory bowel disease requiring novel therapeutic strategies.

Purpose of the Study:

• To investigate the anti-ulcerative colitis (UC) bioactivity of Cnidii Fructus (CF).
• To elucidate the key bioactive constituents of CF responsible for its anti-UC effects.
• To establish a spectrum-effect relationship for CF's anti-UC activity.

Main Methods:

• Chromatographic analysis (HPLC, UPLC-Q/TOF-MS) to profile CF constituents.
• In vitro assays using lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophages to assess anti-inflammatory effects.
• Spectrum-effect analysis to correlate chemical profiles with bioactivity.

Main Results:

• Ten batches of CF demonstrated significant inhibition of LPS-induced inflammation in macrophages.
• HPLC fingerprinting identified 16 common peaks, with 15 characterized using UPLC-Q/TOF-MS.
• Four compounds—diosmin, xanthotoxol, imperatorin, and osthole—were identified as key active constituents for anti-UC effects.

Conclusions:

• This study establishes the first spectrum-effect relationship for CF's anti-UC activity.
• Diosmin, xanthotoxol, imperatorin, and osthole are identified as critical active components.
• Provides a scientific foundation for CF quality control and the development of UC therapeutics.