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二萜类化合物从Steud.的根部靶向严重急性呼吸综合征冠状病毒2(SARS-CoV-2)的RNA依赖性RNA聚合酶(RdRp)。

Diterpenoids target SARS-CoV-2 RdRp from the roots of Steud.

作者信息

Ruan Ting, Xiang Zheng-Rui, Zhang Yun-Wu, Fan Shi-Rui, Ren Juan, Zhao Qian, Sun Xiao-Long, Wu Shi-Li, Xu Li-Li, Qiao Miao, Jing Chen-Xu, Hao Xiao-Jiang, Chen Duo-Zhi

机构信息

State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China.

Yunnan Characteristic Plant Extraction Laboratory, Kunming, China.

出版信息

Front Plant Sci. 2024 Jul 25;15:1425759. doi: 10.3389/fpls.2024.1425759. eCollection 2024.

DOI:10.3389/fpls.2024.1425759
PMID:39119497
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11306077/
Abstract

INTRODUCTION

Currently, the development of new antiviral drugs against COVID-19 remains of significant importance. In traditional Chinese medicine, the herb Steud is often used for antiviral treatment, yet its therapeutic effect against the COVID-19 has been scarcely studied. Therefore, this study focuses on the roots of Steud, exploring its chemical composition, antiviral activity against COVID-19, and the underlying basis of its antiviral activity.

METHODS

Isolation and purification of phytochemicals from Steud. The elucidation of their configurations was achieved through a comprehensive suite of 1D and 2D NMR spectroscopic analyses as well as X-ray diffraction. Performed cytopathic effect assays of SARS-CoV-2 using Vero E6 cells. Used molecular docking to screen for small molecule ligands with binding to SARS-CoV-2 RdRp. Microscale thermophoresis (MST) was used to determine the dissociation constant Kd.

RESULTS

Ultimately, nine new ent-atisane-type diterpenoid compounds were isolated from Steud, named Eupfisenoids A-I (compounds 1-9). The compound of 1 was established as a C-19-degraded ent-atisane-type diterpenoid. During the evaluation of these compounds for their antiviral activity against COVID-19, compound 1 exhibited significant antiviral activity. Furthermore, with the aid of computer virtual screening and microscale thermophoresis (MST) technology, it was found that this compound could directly bind to the RNA-dependent RNA polymerase (RdRp, NSP12) of the COVID-19, a key enzyme in virus replication. This suggests that the compound inhibits virus replication by targeting RdRp.

DISCUSSION

Through this research, not only has our understanding of the antiviral components and material basis of Steud been enriched, but also the potential of atisane-type diterpenoid compounds as antiviral agents against COVID-19 has been discovered. The findings mentioned above will provide valuable insights for the development of drugs against COVID-19.

摘要

引言

目前,开发针对新型冠状病毒肺炎(COVID-19)的新型抗病毒药物仍然至关重要。在传统中药中,“Steud”这种草药常被用于抗病毒治疗,但其对COVID-19的治疗效果鲜有研究。因此,本研究聚焦于“Steud”的根部,探索其化学成分、对COVID-19的抗病毒活性及其抗病毒活性的潜在基础。

方法

从“Steud”中分离和纯化植物化学物质。通过一系列一维和二维核磁共振光谱分析以及X射线衍射确定其构型。使用Vero E6细胞进行严重急性呼吸综合征冠状病毒2(SARS-CoV-2)的细胞病变效应测定。利用分子对接筛选与SARS-CoV-2 RNA依赖性RNA聚合酶(RdRp)结合的小分子配体。使用微量热泳动(MST)测定解离常数Kd。

结果

最终,从“Steud”中分离出9种新的对映-乌苏烷型二萜化合物,命名为优菲斯烷类化合物A-I(化合物1-9)。化合物1被确定为一种C-19降解的对映-乌苏烷型二萜。在评估这些化合物对COVID-19的抗病毒活性时,化合物1表现出显著的抗病毒活性。此外,借助计算机虚拟筛选和微量热泳动(MST)技术,发现该化合物可直接与COVID-19的RNA依赖性RNA聚合酶(RdRp,NSP12)结合,这是病毒复制中的关键酶。这表明该化合物通过靶向RdRp抑制病毒复制。

讨论

通过本研究,不仅丰富了我们对“Steud”的抗病毒成分和物质基础的认识,还发现了乌苏烷型二萜化合物作为抗COVID-19抗病毒药物的潜力。上述发现将为开发抗COVID-19药物提供有价值的见解。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdfe/11306077/af97726b947e/fpls-15-1425759-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdfe/11306077/6c9a62c3e565/fpls-15-1425759-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdfe/11306077/3e751a4bc65a/fpls-15-1425759-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdfe/11306077/bff695e97630/fpls-15-1425759-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdfe/11306077/a4a67f52387a/fpls-15-1425759-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdfe/11306077/8cce5787d7c4/fpls-15-1425759-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdfe/11306077/af97726b947e/fpls-15-1425759-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdfe/11306077/6c9a62c3e565/fpls-15-1425759-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdfe/11306077/3e751a4bc65a/fpls-15-1425759-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdfe/11306077/bff695e97630/fpls-15-1425759-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdfe/11306077/a4a67f52387a/fpls-15-1425759-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdfe/11306077/8cce5787d7c4/fpls-15-1425759-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdfe/11306077/af97726b947e/fpls-15-1425759-g006.jpg

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