Cytotoxic fungi--an overview.

Area of Science:

• Toxicology
• Mycology
• Internal Medicine

Background:

• Fungal toxins pose significant health risks, with amatoxins and orellanine being particularly dangerous.
• Amatoxins from Amanita, Galerina, and Lepiota species disrupt protein synthesis and induce apoptosis, targeting the liver, kidneys, and intestines.
• Orellanine, found in Cortinarius species, is a nephrotoxin that inhibits protein synthesis and generates free radicals, often presenting with delayed renal damage.

Purpose of the Study:

• To review the mechanisms of toxicity and clinical manifestations of major fungal toxins.
• To discuss current treatment strategies and limitations for poisoning by amatoxins and orellanine.
• To highlight other mycotoxins causing organ damage, such as those from Tricholoma equestre, Amanita smithiana, A. proxima, and Gyromitra species.

Main Methods:

• Literature review of scientific articles and case reports on fungal toxins.
• Analysis of toxicological mechanisms, target organs, and clinical outcomes.
• Evaluation of therapeutic interventions and supportive care protocols.

Main Results:

• Amatoxins cause cell death via inhibited protein synthesis and apoptosis, leading to liver and kidney damage. Treatment is primarily supportive, with some agents potentially limiting hepatic injury.
• Orellanine poisoning results in severe kidney damage due to its nephrotoxic effects, with supportive care being the sole treatment option.
• Other fungi like Tricholoma equestre, Amanita smithiana, A. proxima, and Gyromitra species can cause rhabdomyolysis, kidney damage, neurotoxicity, hepatic damage, and hemolysis.

Conclusions:

• Amatoxin and orellanine poisoning require immediate supportive care, as specific antidotes are lacking.
• Understanding the diverse mechanisms of fungal toxins is crucial for effective clinical management and prevention.
• Further research is needed to develop targeted therapies for severe mycotoxin-induced organ damage.