Sesterterpenoids from the sponge Sarcotragus sp

Area of Science:

• Marine Natural Products Chemistry
• Organic Chemistry
• Pharmacology

Background:

• Marine sponges are a rich source of structurally diverse secondary metabolites.
• Sarcotragus species are known to produce various bioactive compounds.
• Understanding the chemical diversity and bioactivity of marine organisms is crucial for drug discovery.

Purpose of the Study:

• To isolate and characterize new sesterterpenoids from the Korean sponge Sarcotragus sp.
• To evaluate the biological activities of the isolated compounds, including antibacterial, cytotoxic, and enzyme inhibitory effects.

Main Methods:

• Chemical investigation involving extraction, isolation, and purification of compounds from the sponge Sarcotragus sp.
• Structure elucidation using comprehensive spectroscopic analyses (NMR, MS, etc.).
• Biological assays to assess antibacterial activity, cytotoxicity against K562 cell line, and inhibition of isocitrate lyase.

Main Results:

• Isolation of nineteen new and eight known sesterterpenoids with linear structures and oxygenated functionalities.
• Determination and assignment of configurations for several compounds.
• Identification of compounds exhibiting moderate to major antibacterial activity (1-3, 17, 18).
• Detection of cytotoxic activity in compounds 3, 11, and 12 against K562 cells.
• Inhibition of isocitrate lyase by compounds 6 and 13.

Conclusions:

• The study expanded the knowledge of sesterterpenoid diversity in marine sponges.
• Several isolated sesterterpenoids demonstrated promising bioactivities, warranting further investigation for therapeutic potential.
• The findings highlight the Sarcotragus sponge as a valuable source for novel bioactive natural products.