Fumonisin

Fumonisin Full Name

Fumonisin

Fumonisin Introduction

Fumonisins are a class of mycotoxins (toxic secondary metabolites produced by fungi) that were first identified in the late 1980s from cultures of the fungusFusarium verticillioides (formerly known as Fusarium moniliforme). These toxins are primarily produced by several species of the genusFusarium, with F. verticillioides and F. proliferatum being the most common producers worldwide. Fumonisins are widely distributed in nature and are most frequently associated with corn (Zea mays) and corn-based products, as Fusarium species are prevalent fungal pathogens of corn crops globally. Notably, even apparently healthy-looking corn kernels can contain detectable levels of fumonisins, making their presence a persistent concern for food and feed safety.

Figure 1. Strcuture of Fumonisin.

Toxicological Effects on Animals and Humans
Fumonisins exhibit significant toxicity to both animals and humans. In animals, exposure to fumonisins has been linked to specific diseases: horses fed fumonisin-contaminated corn or corn-based feeds develop equine leukoencephalomalacia (LEM), a fatal neurological disorder, while swine experience adverse pulmonary effects such as pulmonary edema syndrome (PES) and hydrothorax. In experimental studies, fumonisins have been shown to induce liver carcinogenesis in rats, with female mice developing increased incidences of liver tumors and male rats developing kidney tumors in chronic toxicity studies. For humans, limited epidemiological studies suggest a potential link between fumonisin exposure and an increased risk of esophageal cancer, particularly in regions where corn is a staple food. Additionally, fumonisins may be associated with human neural tube defects in fetuses in areas with high corn consumption. Mechanistically, fumonisins exert their toxicity by inhibiting ceramide synthetase, an enzyme involved in converting sphingolipids to ceramides, disrupting cellular sphingolipid metabolism.

Regulation, Analysis, and Control
Due to their health risks, many countries and international bodies have established regulatory limits or guidelines for fumonisin levels in food and feed. Monitoring requires sensitive analytical methods, primarily using high-performance liquid chromatography coupled with fluorescence detection or mass spectrometry. Control strategies focus on preventing fungal growth through good agricultural practices, proper drying and storage of crops, and the development of resistant plant varieties. Detoxification methods, such as chemical treatments, nixtamalization (an alkaline cooking process), and adsorption using binding agents in animal feed, are also employed to reduce contamination levels.

Alternate Names for Fumonisin

Fumonisin