Zearalenone (ZEN)

Zearalenone (ZEN) is a potent non-steroidal estrogenic mycotoxin produced by several fungal species of the genus Fusarium, including F. graminearum and F. culmorum. It is frequently found as a contaminant in cereal crops such as maize, barley, and wheat worldwide (EFSA Journal, 2011). While it is not a therapeutic target, it is biologically significant as a xenoestrogen because its chemical structure allows it to bind to Estrogen Receptors (ERα and ERβ) with high affinity. This binding mimics natural estrogens, leading to endocrine disruption, hyperestrogenism, and severe reproductive disorders in animals, particularly swine, and has been implicated in precocious puberty and hormone-related cancers in humans (PubMed, PMID: 29273245). In a toxicological context, Zearalenone undergoes hepatic metabolism to form α-zearalenol and β-zearalenol, with the alpha-isomer being significantly more estrogenic than the parent compound. Therapeutic interventions are not typically designed to target ZEN directly; instead, mitigation strategies focus on mycotoxin sequestering agents in animal feed or the use of estrogen receptor antagonists to block its biological effects in clinical or experimental settings (NIH/National Toxicology Program). Its presence in the human food chain remains a major public health concern due to its stability during food processing and its potential for long-term cumulative toxicity.

Other names

F-2 toxin(S)-(-)-ZearalenoneMycotoxin F26-(10-hydroxy-6-oxo-undecyl)-beta-resorcyclic acid lactone

Zearalenone is not a therapeutic target but a ligand; it acts as an agonist for Estrogen Receptor Alpha (ERα) and Estrogen Receptor Beta (ERβ), mimicking the action of 17β-estradiol (PubChem, CID 5281576; NIH). Drugs like Tamoxifen or Fulvestrant can competitively inhibit its binding to these receptors.