title: Bioactive metabolites from Phoma species, an endophytic fungus from the Chinese medicinal plant Arisaema erubescens.
abstract: Through bioassay-guided fractionation, the EtOAc extract of a culture broth of the endophytic fungus Phoma species ZJWCF006 in Arisaema erubescens afforded a new α-tetralone derivative, (3S)-3,6,7-trihydroxy-α-tetralone (1), together with cercosporamide (2), β-sitosterol (3), and trichodermin (4). The structures of compounds were established on the basis of spectroscopic analyses. Compounds 1, 2, and 3 were obtained from Phoma species for the first time. Additionally, the compounds were subjected to bioactivity assays, including antimicrobial activity, against four plant pathogenic fungi (Fusarium oxysporium, Rhizoctonia solani, Colletotrichum gloeosporioides, and Magnaporthe oryzae) and two plant pathogenic bacteria (Xanthomonas campestris and Xanthomonas oryzae), as well as in vitro antitumor activities against HT-29, SMMC-772, MCF-7, HL-60, MGC80-3, and P388 cell lines. Compound 1 showed growth inhibition against F. oxysporium and R. solani with EC₅₀ values of 413.22 and 48.5 μg/mL, respectively. Additionally, compound 1 showed no cytotoxicity, whereas compound 2 exhibited cytotoxic activity against the six tumor cell lines tested, with IC₅₀ values of 9.3 ± 2.8, 27.87 ± 1.78, 48.79 ± 2.56, 37.57 ± 1.65, 27.83 ± 0.48, and 30.37 ± 0.28 μM, respectively. We conclude that endophytic Phoma are promising sources of natural bioactive and novel metabolites.
authors.affiliation: Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Ministry of Agriculture, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China.
authors.forename: Li-Wei
authors.initials: LW
authors.lastname: Wang
authors.forename: Bai-Ge
authors.initials: BG
authors.lastname: Xu
authors.forename: Jia-Ying
authors.initials: JY
authors.lastname: Wang
authors.forename: Zhen-Zhu
authors.initials: ZZ
authors.lastname: Su
authors.forename: Fu-Cheng
authors.initials: FC
authors.lastname: Lin
authors.forename: Chu-Long
authors.initials: CL
authors.lastname: Zhang
authors.forename: Christian P
authors.initials: CP
authors.lastname: Kubicek
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000378:metabolism* / Q000494:pharmacology; D000935:Antifungal Agents / Q000737:chemistry / Q000378:metabolism* / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000737:chemistry / Q000378:metabolism* / Q000494:pharmacology; D031057:Arisaema / Q000382:microbiology*; D001203:Ascomycota / Q000254:growth & development / Q000302:isolation & purification / Q000378:metabolism*; D001572:Benzofurans / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology; D045744:Cell Line, Tumor / Q000187:drug effects; D017077:Culture Media, Conditioned / Q000737:chemistry; D060026:Endophytes / Q000254:growth & development / Q000302:isolation & purification / Q000378:metabolism*; D005658:Fungi / Q000187:drug effects; D018922:HL-60 Cells / Q000187:drug effects; D019073:HT29 Cells / Q000187:drug effects; D006801:Humans; D008516:Medicine, Chinese Traditional; D010935:Plant Diseases / Q000382:microbiology; D012855:Sitosterols / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology; D013045:Species Specificity; D044024:Tetralones / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology; D014243:Trichodermin / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology; D014974:Xanthomonas / Q000187:drug effects
chemical_list: D000900:Anti-Bacterial Agents; D000935:Antifungal Agents; D000970:Antineoplastic Agents; D001572:Benzofurans; D017077:Culture Media, Conditioned; D012855:Sitosterols; D044024:Tetralones; C085452:cercosporamide; D014243:Trichodermin; C025473:gamma-sitosterol