Co-cultivation and Medium Optimization: A Strategy for Discovering Fungal-derived Protease Inhibitors.

Area of Science:

• Mycology
• Natural Product Chemistry
• Pharmacology

Background:

• Fungal co-cultivation is a promising strategy for discovering novel secondary metabolites.
• Fusarium guttiforme and Phytophthora palmivora are known producers of bioactive compounds.

Purpose of the Study:

• To investigate the potential of co-culturing Fusarium guttiforme and Phytophthora palmivora to enhance secondary metabolite production.
• To evaluate the bioactivity of extracted compounds, focusing on protease inhibition, antiparasitic, and antifungal properties.

Main Methods:

• Cultivation of fungi in four different media (Potato Dextrose Agar, Czapek, rice, ISP2).
• Co-culturing of Fusarium guttiforme and Phytophthora palmivora.
• Extraction and fractionation of secondary metabolites.
• Assays for papain inhibitory activity, anti-Trypanosoma cruzi activity, and antifungal activity against Candida spp.

Main Results:

• Isolation of compounds including magnesium complex of fusaric acid (2), haematocin (4), and others.
• Compounds 2 and 4 demonstrated significant papain inhibitory activity (IC50 < 20 µM).
• Compounds 2 and 4 showed notable anti-Trypanosoma cruzi activity (IC50 values of 12.19 µM and 13.32 µM, respectively).
• Antifungal activity against Candida spp. was observed for compound 2 and the magnesium complex of 9,10-dehydrofusaric acid complex (3) (MICs of 50 µg/mL).

Conclusions:

• Fungal co-cultivation and varied culture media are effective strategies for discovering bioactive compounds.
• The identified compounds show potential as novel protease inhibitors and antiparasitic agents.
• Further research into these compounds could lead to new therapeutic applications.