Anti-inflammatory cyathane diterpenoids from Sarcodon scabrosus

Area of Science:

• Natural Product Chemistry
• Pharmacology

Background:

• The mushroom Sarcodon scabrosus is a source of bioactive compounds.
• Diterpenoids are a class of natural products with diverse biological activities.

Purpose of the Study:

• To isolate and characterize novel diterpenoids from Sarcodon scabrosus.
• To evaluate the anti-inflammatory potential of isolated and synthesized compounds.

Main Methods:

• Isolation of compounds from Sarcodon scabrosus fruiting bodies using chromatographic techniques.
• Structure elucidation of novel compounds using spectral data (e.g., NMR, MS).
• Synthesis of sarcodonin A derivatives.
• Topical application assay to evaluate anti-inflammatory activity on mouse ears induced by 12-O-tetradecanoylphorbol-13-acetate (TPA).

Main Results:

• Four novel diterpenoids were isolated: neosarcodonin O (a cyathane diterpenoid) and three 19-O-acyl derivatives of sarcodonin A (linoleoyl, oleoyl, and stearoyl).
• The structures of the novel compounds were confirmed through spectral analysis and comparison with synthesized analogs.
• The isolated compounds, along with five synthesized 19-O-acyl derivatives of sarcodonin A, demonstrated inhibitory activity against TPA-induced inflammation.

Conclusions:

• Sarcodon scabrosus is a valuable source of structurally diverse diterpenoids.
• Neosarcodonin O and acylated sarcodonin A derivatives possess significant anti-inflammatory properties.
• These findings suggest potential therapeutic applications for these compounds in managing inflammatory conditions.