Cytotoxic sesterterpenoids from a sponge Hippospongia sp

Area of Science:

• Marine Natural Products Chemistry
• Organic Chemistry
• Pharmacology

Background:

• Marine sponges are a rich source of structurally diverse secondary metabolites.
• The genus Hippospongia is known to produce various sesterterpenoids.
• Exploring novel compounds from marine organisms can lead to new therapeutic agents.

Purpose of the Study:

• To isolate and characterize new sesterterpenes from the sponge Hippospongia sp.
• To investigate the cytotoxic potential of the isolated compounds against human cancer cell lines.

Main Methods:

• Spectroscopic data analysis (NMR, MS) for structure elucidation.
• Isolation and purification techniques (chromatography).
• In vitro cytotoxicity assays against DLD-1, HCT-116, T-47D, and K562 cancer cell lines.

Main Results:

• One new pentacyclic sesterterpene, hippospongide A, and one new scalarane sesterterpenoid, hippospongide B, were identified.
• Six known scalarane-type sesterterpenes were also isolated.
• Compounds 3-5 demonstrated significant cytotoxicity against the tested cancer cell lines.

Conclusions:

• Hippospongia sp. yielded novel pentacyclic and scalarane sesterterpenes.
• The isolated compounds represent the first reported metabolites of these classes from this genus.
• The cytotoxic activity suggests potential for further development as anticancer agents.