4106 alpha-Zearalenol Alpha-zearalenol belongs to the family of Macrolides and Analogues. These are organic compounds containing a lactone ring of at least twelve members. The term 'macrolide' encompasses a diverse family of unrelated compounds with large macrolactam rings. 36455-72-8 5284645 C18H24O5 White powder. Mycotoxins, such as alpha-zearalenol (alpha-ZOL) and beta-zearalenol (beta-ZOL), as contaminants of animal food can impair fertility and can cause abnormal fetal development in farm animals. The addition of alpha- or beta-ZOL (7.5, 15 and 30 microM) to cultures stimulated with FSH (0.01 microg) or forskolin (10 microM) reduced progesterone synthesis and the levels of p450scc and 3beta-HSD transcripts in a dose-dependent manner (P<0.05). The enzymatic activity of 3beta-HSD and the abundance of p450scc protein were also reduced by these mycotoxins. The effects of mycotoxins on FSH receptor-dependent and receptor-independent pathways indicate that adenylate cyclase activity and/or regulatory pathways further downstream are targets of mycotoxin actions. The apparent dose-dependent reduction of p450scc and 3beta-HSD transcripts implies an effect of alpha- and beta-ZOL on transcriptional regulation of these enzymes. Testing the zearalenone derivatives, _- and _-ZOL, which is metabolised in the liver, as an examination of excretory products indicated a predominance of the _ epimer in pig and man. (A15419) Generally, alpha-zearalenol possess estrogenic potencies that are approximately 50% compared to that of E2, and their order of estrogenic potency (in both in vitro receptor competitive binding and in vivo induction of Vtg and Zr-proteins levels) is: alpha-zearalenol > beta-zearalenol. It has also been observed that mycotoxin alpha and beta zearalenol influence the apoptosis and proliferation of cultured granulosa cells from equine ovaries. (L2099) The mechanisms by which _-ZOL or _-ZOL mediates their cytotoxic effects appear to differ according to cell type and the exposed toxins. In evaluating the toxicity of _-ZOL and _-ZOL on RAW264.7 macrophages, _-ZOL not only more strongly reduced the viability of cells than did _-ZOL, but it also induced cell death mainly by apoptosis rather than necrosis. The zearalenone metabolites induced loss of mitochondrial membrane potential (MMP), mitochondrial changes in Bcl-2 and Bax proteins, and cytoplasmic release of cytochrome c and apoptosis-inducing factor (AIF). Use of an inhibitor specific to c-Jun N-terminal kinase (JNK), p38 kinase or p53, but not pan-caspase or caspase-8, decreased the toxin-induced generation of reactive oxygen species (ROS) and also attenuated the _-ZOL- or _-ZOL-induced decrease of cell viability. The activation of p53, JNK or p38 kinase by zearalenone metabolites is the main upstream signal required for the mitochondrial alteration of Bcl-2/Bax signaling pathways and intracellular ROS generation, while MMP loss and nuclear translocation of AIF are the critical downstream events for zearalenone metabolite-mediated apoptosis in macrophages. (A15420) No indication of carcinogenicity to humans (not listed by IARC). 2014-08-29T04:58:39Z 2026-03-31T17:35:07Z C14750 true C[C@H]1CCC[C@H](O)CCC\C=C\C2=CC(O)=CC(O)=C2C(=O)O1 C18H24O5 InChI=1S/C18H24O5/c1-12-6-5-9-14(19)8-4-2-3-7-13-10-15(20)11-16(21)17(13)18(22)23-12/h3,7,10-12,14,19-21H,2,4-6,8-9H2,1H3/b7-3+/t12-,14+/m0/s1 FPQFYIAXQDXNOR-QDKLYSGJSA-N 320.3802 320.162373878 Exogenous Solid HMDB41824 4447689 CHEM003012 DTXSID8022402 NS00009213 86.99 89.36759999999998 34.46624002218701 0 4 3 8.537725924169745 -1.2452366966016095 0 2 3.27 -3.34 1.46e-01 g/l