真菌Talaromyces stipitatus 中具有抗炎活性oligophenalenone二聚体
朱玲(1998—), 女, 江苏省泰兴市人, 硕士研究生, 研究方向海洋微生物资源与活性物质。email: |
Copy editor: 林强
收稿日期: 2023-02-03
修回日期: 2023-03-21
网络出版日期: 2023-03-24
基金资助
国家自然科学基金(81903772)
Oligophenalenone dimers with anti-inflammatory activities from fungus Talaromyces stipitatus
Copy editor: LIN Qiang
Received date: 2023-02-03
Revised date: 2023-03-21
Online published: 2023-03-24
Supported by
National Natural Science Foundation of China(81903772)
真菌Talaromyces stipitatus 的发酵产物对脂多糖诱导的RAW264.7巨噬细胞系一氧化氮 (NO)生成具有抑制作用。本实验以生物活性分析为导向, 从真菌T. stipitatus 发酵产物中分离得到6个具有抗炎活性的次生代谢产物, 通过与文献比对核磁共振(nuclear magnetic resonance, NMR)和高分辨电喷雾电离质谱(high resolution electrospray ionization mass spectroscopy, HRESIMS)数据, 鉴定为oligophenalenone二聚体, 分别是bacillisporin A (1)、9a-epi-bacillisporin E (2)、bacillisporin F (3)、duclauxin (4)、bacillisporin B (5)和bacillisporin C (6)。化合物2—5在浓度30µmol·L-1时, 显示出不同程度的NO生成抑制作用, 且对巨噬细胞无细胞毒活性, 抑制率均高于阳性对照药吲哚美辛 (indomethacin, AG); 2—4的半抑制浓度 (IC50)分别为11.82±1.25、11.44±1.58和23.92±2.86µmol·L-1。首次从该种中分离得到5和6, 并首次发现duclauxin及其同系物具有显著的体外抗炎活性, 为抗炎活性研究提供了一类新的模式结构。
朱玲 , 潘超 , 花思露 , 姜薇 . 真菌Talaromyces stipitatus 中具有抗炎活性oligophenalenone二聚体[J]. 热带海洋学报, 2023 , 42(6) : 150 -155 . DOI: 10.11978/2023012
An extract of the fungus Talaromyces stipitatus showed inhibitory activity against the nitric oxide (NO) production in the lipopolysaccharide (LPS)-activated RAW264.7 macrophage cell line, and bioassay-guided separation of the extract provided six oligophenalenone dimers, which were characterized to be bacillisporin A (1), 9a-epi-bacillisporin E (2), bacillisporin F (3), duclauxin (4), bacillisporin B (5) and bacillisporin C (6), respectively, by comparison of the nuclear magnetic resonance (NMR) and high resolution electrospray ionization mass spectroscopy (HRESIMS) data with literature data. 2-5 were noncytotoxic on macrophage cells at 30 µmol·L-1, and displayed inhibitory effects against NO production in LPS-induced RAW264.7 macrophage cells, which were all more active than the positive control indomethacin (AG). The half inhibitory concentration (IC50) values of 2-4 were 11.82±1.25, 11.44±1.58 and 23.92±2.86 µmol·L-1, respectively. 5 and 6 were isolated from T. stipitatus for the first time. Duclauxin and its homologues were firstly discovered to show significant anti-inflammatory activities in vitro, which provide a new structural model for further research of anti-inflammatory activity.
表1 化合物2—6对LPS诱导的RAW264.7细胞NO生成的抑制活性 ($\bar{x} \pm s$, n = 3)Tab. 1 Inhibitory activities of compounds 2-6 against NO production in RAW264.7 cells induced by LPS ($\bar{x} \pm s$, n = 3) |
化合物 | 抑制率/%a | IC50/(µmol·L-1) |
---|---|---|
2 | 92.40±6.48 | 11.82±1.25 |
3 | 90.85±6.15 | 11.44±1.58 |
4 | 74.08±5.04 | 23.92±2.86 |
5 | 44.70±3.42 | >30 |
6 | 9.67±1.06 | >30 |
阳性对照(AG) | 36.71±5.23 | >30 |
注: a测试样品浓度为30.00µmol·L-1 |
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