New macrolides from the sponge Chondrosia corticata

Area of Science:

• Marine Natural Products Chemistry
• Pharmacology
• Mycology

Background:

• Marine sponges are a rich source of structurally diverse secondary metabolites.
• Oxazole-containing compounds have demonstrated various biological activities.
• The marine sponge Chondrosia corticata is known to produce bioactive compounds.

Purpose of the Study:

• To isolate and characterize novel oxazole-containing metabolites from Chondrosia corticata.
• To evaluate the cytotoxic and antifungal activities of the isolated compounds.

Main Methods:

• Isolation of metabolites using chromatographic techniques.
• Structure elucidation using comprehensive spectroscopic analyses (NMR, MS).
• In vitro assessment of cytotoxicity against K562 human leukemia cell line.
• In vitro assessment of antifungal activity against Candida albicans.

Main Results:

• Three new oxazole-containing metabolites, neohalichondramide (5), (19Z)-halichondramide (6), and secohalichondramide (7), were isolated.
• Four known compounds of the same structural class were also identified.
• The novel compounds exhibited significant cytotoxicity against K562 cells.
• The novel compounds displayed significant antifungal activity against Candida albicans.

Conclusions:

• The marine sponge Chondrosia corticata is a source of novel bioactive oxazole derivatives.
• These compounds possess potent cytotoxic and antifungal activities, warranting further investigation for therapeutic potential.
• The findings contribute to the understanding of marine natural products' chemical diversity and pharmacological applications.