Bufadienolides originated from toad source and their anti-inflammatory activity.

Area of Science:

• Natural Products Chemistry
• Pharmacology
• Medicinal Chemistry

Background:

• Bufadienolides are C-24 steroids with an alpha-pyrone at C-17.
• They are key active compounds in traditional Chinese medicine (Chansu) for various ailments.
• Bufadienolides inhibit Na+/K+-ATPase, exhibiting significant anti-inflammatory activity.

Purpose of the Study:

• To review structural diversity, MS fragmentation, anti-inflammatory efficacy, and modification of toad-derived bufadienolides.
• To provide a scientific basis for developing bufadienolide derivatives with reduced adverse effects.
• To explore biotransformation strategies for safer bufadienolide analogs.

Main Methods:

• Literature review focusing on bufadienolide structure and activity.
• Analysis of mass spectrometry (MS) fragmentation patterns.
• Evaluation of anti-inflammatory properties and structure-activity relationships.
• Exploration of biotransformation techniques for chemical modification.

Main Results:

• Bufadienolides possess potent Na+/K+-ATPase inhibitory and anti-inflammatory effects.
• Unbiased inhibition of the alpha1-subtype of Na+/K+-ATPase leads to severe side effects.
• Structural modifications are crucial for mitigating toxicity while retaining efficacy.
• Biotransformation offers a viable route for generating safer bufadienolide derivatives.

Conclusions:

• Bufadienolides are promising anti-inflammatory agents, but their therapeutic application is limited by toxicity.
• Targeted structural alteration through biotransformation is essential for developing safer bufadienolide-based drugs.
• Further research into bufadienolide derivatives holds potential for novel anti-inflammatory therapies.