Journal of Shandong First Medical Unversity & Shandong Academy of Medical Sciences››2023,Vol. 44››Issue (8): 565-569.DOI:10.3969/j.issn.2097-0005.2023.08.002

• Basic Researches •Previous ArticlesNext Articles

Benzopyranones from the FungusLeptosphaeriasp. CXY48

Mingyu ZHANG(), Xiaolin LIU, Xiangchuan KONG, Jing BI, Xinyi LU, Guojun PAN()

  1. College of Life Sciences,Shandong First Medical University & Shandong Academy of Medical Sciences,Taian 271016,China
  • Received:2023-01-26Online:2023-08-25Published:2023-09-14
  • Contact:Guojun PAN

Leptosphaeriasp. CXY48来源苯并吡喃酮类化合物的研究

张明宇(), 刘晓霖, 孔祥传, 毕静, 鲁欣怡, 潘国军()

  1. betway必威登陆网址 (betway.com )生命科学学院,山东 泰安 271016
  • 通讯作者:潘国军
  • 作者简介:张明宇,betway必威登陆网址 (betway.com )2020级生物工程本科,研究方向:天然产物发现与结构修饰,E-mail:1517110447@qq.com
  • 基金资助:
    2022年国家级大学生创新创业训练计划(202210439005)

Abstract:

ObjectiveTo isolate High-quality fungi from the rhizosphere soil ofCynanchum bungeiDecne in order to obtain natural products with good pharmacological effects, which laid a material foundation for the development of new drugs with high efficiency and low toxicity.MethodsThe fungal strainLeptosphaeriasp. CXY48 was fermented in rice medium by static fermentation, and the compounds were isolated and purified using normal and reversed-phase silica gel and high performance liquid chromatography, and the structures of the compounds were identified using mass spectrometry and NMR spectroscopic techniques.ResultsFour benzopyrones were isolated from the secondary metabolites ofLeptosphaeriasp. CXY48 fromCynanchum bungeiDecne, and were identified by spectroscopic and physicochemical property analysis as Fusaraisochromanone 2 (1), Clearanol I (2), Banksialactone A (3), and (R)-3,4-dihydro-4,6,8-trihydroxy-4,5-dimethyl-3-methyleneisochromen-1-one (4). The antibacterial activity of compounds 1 ~ 4 was tested. It was found that the MIC values of compounds 1 and 4 were 3.89 and 70 μg/mLforE. ColiATCC25922, and 187 and 250 μg/mLforS. aureusATCC33591, respectively.ConclusionFour compounds are obtained by isolating the secondary metabolites ofLeptosphaeriasp.CXY48, two of which show some antibacterial activity.

Key words:Cynanchum bungeiDecne,fungi,benzopyranones,antibacterial activity

摘要:

目的从泰山白首乌的根际土壤中分离出优质真菌,以期得到具有较好药理作用的天然产物。方法将真菌菌株Leptosphaeriasp. CXY48在大米培养基中静置发酵,以活性为导向,利用正、反相硅胶及高效液相色谱等方法进行单体化合物的分离纯化,并利用质谱、核磁共振波谱(nuclear magnetic resonance, NMR)等光谱技术对化合物结构进行鉴定。结果从泰山白首乌根际真菌Leptosphaeriasp. CXY48的次级代谢产物中分离得到4种苯并吡喃酮类化合物,通过光谱和理化性能的分析,确定其为Fusaraisochromanone 2 (1), Clearanol I (2), Banksialactone A (3), (R)‐3,4‐dihydro‐4,6,8‐trihydroxy‐4,5‐dimethyl‐3‐methyleneisochromen‐1‐one (4),对化合物1 ~ 4进行了抗菌活性测试,发现化合物1和4对大肠杆菌标准菌株(E. coliATCC25922)的最小抑菌浓度(minimum inhibitory concentration, MIC)值分别为3.89和70 μg/mL,对金黄色葡萄球菌标准菌株(S. aureusATCC33591)的MIC值分别为187和250 μg/mL。结论通过分离Leptosphaeria sp.CXY48的次级代谢产物,获得的4个化合物,其中有2个化合物有一定的抑菌活性。

关键词:泰山白首乌,真菌,苯并吡喃酮,抑菌活性