Structurally Uncommon Secondary Metabolites Derived from Endophytic Fungi

Area of Science:

• Microbiology
• Natural Product Chemistry
• Pharmacology

Background:

• Endophytic fungi, residing within plant tissues, are a rich source of diverse secondary metabolites.
• These metabolites offer protection to host plants against various stresses and possess significant pharmacological potential.
• While reviews often focus on novel compounds, this study emphasizes uncommon structures and fungal diversity.

Purpose of the Study:

• To review and analyze compounds with uncommon bioactive structures produced by endophytic fungi.
• To establish the diversity of endophytic fungi and their metabolite production networks.
• To consolidate findings on rare or unprecedented compounds isolated between January 2015 and December 2020.

Main Methods:

• Literature review of scientific publications from January 2015 to December 2020.
• Focus on compounds catalogued as unprecedented, rare, or possessing novel structural skeletons.
• Analysis of fungal genera, compound classes, biological activities, and isolation techniques.

Main Results:

• Over 39 different fungal genera were identified as producers of these unique compounds, with Aspergillus and Penicillium being most frequently cited.
• Compounds exhibited a range of biological activities, including cytotoxic, antitumor, antimicrobial, antiviral, and anti-inflammatory effects.
• Solid culture using rice as a carbon source was the predominant method for isolating these compounds.

Conclusions:

• Endophytic fungi are a valuable resource for discovering structurally unique and biologically active secondary metabolites.
• The study underscores the importance of exploring less common endophytic fungal metabolites for pharmaceutical development.
• Continued research into endophytic fungi promises novel therapeutic agents and a deeper understanding of fungal biodiversity.