王越,张玉琴,徐喆菲,等.红榄李内生真菌Aspergillus terreus HT-1二酮哌嗪类次级代谢产物研究[J].中国海洋药物,2022,41(6):10-16. |
红榄李内生真菌Aspergillus terreus HT-1二酮哌嗪类次级代谢产物研究 |
Study on the Diketopiperazines from the Lumnitzera littorea-derived fungus Aspergillus terreus HT-1 |
投稿时间:2021-11-16 修订日期:2021-12-12 |
DOI:10.13400/j.cnki.cjmd.2022.06.007 |
中文关键词: 红榄李 内生真菌 曲霉属 次级代谢产物 |
English Keywords:Lumnitzera littorea endophytic fungi Aspergillus secondary metabolites |
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中文摘要: |
目的 研究红榄李Lumnitzera littorea内生真菌Aspergillus terreus HT-1的次级代谢产物。方法 对从红榄李中分离得到的内生真菌A. terreus HT-1进行大规模发酵,并采用多种色谱技术对其发酵产物进行分离纯化。通过多种波谱方法鉴定单体化合物结构。结果 从A. terreus HT-1发酵产物的乙酸乙酯萃取物中分离得到了15个二酮哌嗪类化合物,分别鉴定为bis(dethio)bis(methylsulfanyl) gliotoxin(1),环(D-4-羟基-脯氨酸-L-苯丙氨酸)二肽(2),环(L-4-羟基-脯氨酸-L-苯丙氨酸)二肽(3),环(L-4-羟基-脯氨酸-L-酪氨酸)二肽(4),环(L-4-羟基-脯氨酸-L-亮氨酸)二肽(5),环(L-丙氨酸-L-4-羟基-脯氨酸)二肽(6),环(D-4-羟基-脯氨酸-D-异亮氨酸)二肽(7),环(D-脯氨酸-L-酪氨酸)二肽(8),环(L-亮氨酸-L-脯氨酸)二肽(9),环(L-脯氨酸-L-苏氨酸)二肽(10),环(L-脯氨酸-L-丙氨酸)二肽(11),环(L-脯氨酸-甘氨酸)二肽(12),环(L-苯丙氨酸-甘氨酸)二肽(13),环(谷氨酸-L-酪氨酸)二肽(14),terezine D(15),并采用MTT法检测全部化合物的神经保护活性。结论 在200 μmol/L浓度下,化合物1和5显示出较好的神经保护活性,使H2O2诱导氧化损伤的神经细胞(HT22)的细胞存活率从44.06%分别提高到69.51%和76.75%。本研究为红榄李及其内生真菌的开发利用研究提供了理论基础。 |
English Summary: |
Objective To study the secondary metabolites of Aspergillus terreus HT-1, an endophytic fungus from Lumnitzera littorea. Methods The endophytic fungus A. terreus HT-1 was isolated from a mangrove plant, L. littorea. Its secondary metabolites were purified by various chromatograph technology, and the structures of the isolated compounds were identified on the basis of spectral evidences. Results Fifteen diketopiperazines, bis(dethio)bis(methylsulfanyl) gliotoxin (1), cyclo-(D-4-OH-Pro-L-Phe) (2), cyclo-(L-4-OH-Pro-L-Phe) (3), cyclo-(L-4-OH-Pro-L-Tyr) (4), cyclo-(L-4-OH-Pro-L-Leu) (5), cyclo-(L-Ala-L-4-OH-Pro) (6), cyclo-(D-4-OH-Pro-D-Ile) (7), cyclo-(D-Pro-L-Tyr) (8), cyclo-(L-Leu-L-Pro) (9), cyclo-(L-Pro-L-Thr) (10), cyclo-(L-Pro-L-Ala) (11), cyclo-(L-Pro-Gly) (12), cyclo-(L-Phe-Gly) (13), cyclo-(Glu-L-Tyr) (14), and terezine D (15) were isolated from the EtOAc extract of the secondary metabolites of A. terreus HT-1. The neuroprotective activities of all compounds were detected by MTT method. Conclusion At a concentration of 200 μmol/L, compounds 1 and 5 showed obvious neuroprotective activity, increased the cell survival rate of H2O2 induced oxidative damage HT22 cells from 44.06% to 69.51% and 76.75%, respectively. This study provides a theoretical basis for the development and utilization of mangrove plant and its endophytic fungi. |
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