Dibenzofurans from Lichens - A Pharmacological Overview

Area of Science:

• Mycology
• Botany
• Pharmacology

Background:

• Lichens are symbiotic organisms comprising fungi (mycobionts) and algae/cyanobacteria (photobionts).
• They produce unique secondary metabolites, including dibenzofurans, with limited study to date.
• Dibenzofurans represent a class of over 35 identified compounds, with usnic acid being the most researched.

Purpose of the Study:

• To review dibenzofurans isolated from lichens.
• To explore their pharmacological activities, focusing on recent findings.
• To guide future research into the medicinal potential of these compounds.

Main Methods:

• Literature review of dibenzofurans isolated from lichens.
• Compilation of reported pharmacological data.
• Analysis of antibacterial, antifungal, and cytotoxic activities.

Main Results:

• The review covered several dibenzofurans: alectosarmentin, condidymic acid, didymic acid, isousnic acid, isostrepsilic acid, usimines A-C, and usnic acid.
• Most of these compounds exhibited notable antibacterial, antifungal, and cytotoxic effects.
• Usnic acid was identified as the most extensively studied dibenzuran.

Conclusions:

• Dibenzofurans from lichens possess promising pharmacological activities.
• These findings support further investigation into their therapeutic applications.
• The reviewed compounds offer a basis for developing novel antimicrobial and cytotoxic agents.