Superoxide and traditional Chinese medicines

Area of Science:

• Biochemistry
• Traditional Chinese Medicine
• Pharmacology

Background:

• Traditional Chinese Medicine (TCM) classifies herbs as 'cold', 'neutral', or 'hot'.
• These classifications are traditionally linked to therapeutic effects and physiological responses.
• The underlying biochemical mechanisms remain largely unexplored.

Purpose of the Study:

• To investigate the biochemical basis for TCM herb classifications ('cold' and 'hot').
• To explore the role of reactive oxygen species, specifically superoxide, in herb properties.
• To correlate superoxide production and scavenging with TCM's yin-yang theory.

Main Methods:

• Fluorometric analysis was employed to quantify superoxide production in herbs.
• Herbs were categorized based on TCM properties ('cold' and 'hot').
• Superoxide scavenging activity was assessed in 'hot' property herbs.

Main Results:

• Herbs with 'cold' properties exhibited significant superoxide production.
• 'Hot' property herbs demonstrated substantial superoxide scavenging activities.
• A clear distinction in superoxide metabolism was observed between 'cold' and 'hot' herbs.

Conclusions:

• Superoxide production and scavenging correlate with TCM herb classifications.
• These findings suggest a biochemical explanation for 'cold' (yin) and 'hot' (yang) properties.
• Electron transfer and superoxide metabolism may underpin TCM's yin-yang duality.