title: Structure elucidation and biological activity of two new trichothecenes from an endophyte, Myrothecium roridum.
abstract: Worldwide, many different grains are infected by various fungi that may produce trichothecene mycotoxins. Fungi that produce trichothecenes, as well as the trichothecenes themselves, are potential problems for public health. On the other hand, trichothecenes possess multiple biological activities. Reduced toxicity may result in their applications in the pharmaceutical field. Two new trichothecenes along with seven known trichothecenes were isolated from an endophyte of the herb plant Ajuga decumbens. Their structures were deduced from 1D and 2D NMR data. The results of MTT assays revealed that new trichothecene 2',3'-epoxymyrothecine A, 1, and myrothecine A, 3, exhibited much lower toxicity compared to other trichothecenes. New trichothecene 2',3'-epoxymyrothecine A, 1, could induce phosphorylation of JNK (c-Jun N-terminal protein kinase) protein and the PARP (poly ADP-ribose polymerase) cleavage, and eventually induce apoptosis in cancer cells. These results point out the possibility for application of trichothecenes as chemotherapeutic agent.
authors.affiliation: School of Pharmaceutical Sciences, Xiamen University , South Xiangan Road, Xiamen, Fujian 361102, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Lin
authors.forename: Guanghui
authors.initials: G
authors.lastname: Wang
authors.forename: Yuqi
authors.initials: Y
authors.lastname: Zhou
authors.forename: Dequan
authors.initials: D
authors.lastname: Zeng
authors.forename: Xiaoxuan
authors.initials: X
authors.lastname: Liu
authors.forename: Rong
authors.initials: R
authors.lastname: Ding
authors.forename: Xin
authors.initials: X
authors.lastname: Jiang
authors.forename: Dan
authors.initials: D
authors.lastname: Zhu
authors.forename: Wenjun
authors.initials: W
authors.lastname: Shan
authors.forename: Haifeng
authors.initials: H
authors.lastname: Chen
mesh_terms: D031328:Ajuga / Q000382:microbiology*; D017209:Apoptosis / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D060026:Endophytes / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism; D006801:Humans; D006999:Hypocreales / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism; D015394:Molecular Structure; D009183:Mycotoxins / Q000737:chemistry* / Q000378:metabolism / Q000633:toxicity*; D014255:Trichothecenes / Q000737:chemistry* / Q000378:metabolism / Q000633:toxicity*; D014407:Tumor Cells, Cultured
chemical_list: D009183:Mycotoxins; D014255:Trichothecenes