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Cui WL, Guo DX, Wang N, Wang ZF, Ji JB, Wang X, Yang CG, Lin YQ, Wang SQ. Identification of chemosensitizing agents of colorectal cancer in Rauvolfia vomitoria using an NMR-based chemometric approach. Front Chem 2023; 10:1069591. [PMID: 36688051 PMCID: PMC9852911 DOI: 10.3389/fchem.2022.1069591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 12/19/2022] [Indexed: 01/07/2023] Open
Abstract
Searching for new adjuvants of conventional chemotherapeutic approaches against colorectal cancer cells is extremely urgent. In current research, a non-targeted analytical approach was established by combining proton nuclear magnetic resonance spectroscopy with a chemometrics data mining tool to identify chemosensitizing agents from Rauvolfia vomitoria. This approach enabled the identification of potential active constituents in the initial fractionation process and provided their structural information. This strategy was validated by its application to Rauvolfia vomitoria extract exhibiting chemosensitizing activity on 5-fluorouracil against colorectal cancer cells. After the workflow, the biochemometrics analysis showed that at least 15 signals (Variable influence on projection (VIP) > 1) could have contributions in the differentiation of various fractions. Through systematic literature and database searches, we found that the most active fraction (fraction 7) exhibited the highest presence of sabazin-type and armaniline-type alkaloids, which were potential chemosensitizers as previously reported. To validate the results of the strategy, the effect of 5-FU and compounds isolated from fraction seven incubation on HCT-8 and LoVo cell vialibilty were evaluated. These results evidenced that compound β-carboline (3), 1-methyl-β-carboline (4), and lochnerine (6) could enhance the cytotoxicity of 5-fluorouracil against to Colorectal cancer cells. Besides, 21 compounds including two new compounds were isolated from Rauvolfia vomitoria. The experimental results verify the reliability of the method, and this approach provides a new and efficient tool to overcome some of the bottlenecks in natural products drug discovery.
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Affiliation(s)
- Wei-Liang Cui
- Shandong Institute for Food and Drug Control, Jinan, Shandong, China
| | - Dong-Xiao Guo
- Shandong Institute for Food and Drug Control, Jinan, Shandong, China
| | - Ning Wang
- Key Laboratory of Chemical Biology of Nature Products (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Zhi-Fan Wang
- Key Laboratory of Chemical Biology of Nature Products (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Jian-Bo Ji
- Key Laboratory of Chemical Biology of Nature Products (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xiao Wang
- Key Laboratory of Chemical Biology of Nature Products (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Chun-Guo Yang
- Shandong Yifang Pharmaceutical Co., Ltd., Jinan, China
| | - Yong-Qiang Lin
- Shandong Institute for Food and Drug Control, Jinan, Shandong, China,NMPA Key Laboratory for Quality Evaluation of Gelatin Products, Jinan, China,Shandong Engineering Research Center for Generic Technologies of Traditional Chinese Medicine Formula Granules, Jinan, China,*Correspondence: Yong-Qiang Lin, ; Shu-Qi Wang,
| | - Shu-Qi Wang
- Key Laboratory of Chemical Biology of Nature Products (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China,*Correspondence: Yong-Qiang Lin, ; Shu-Qi Wang,
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Zeng J, Zhang DB, Zhou PP, Zhang QL, Zhao L, Chen JJ, Gao K. Rauvomines A and B, Two Monoterpenoid Indole Alkaloids from Rauvolfia vomitoria. Org Lett 2017; 19:3998-4001. [PMID: 28718654 DOI: 10.1021/acs.orglett.7b01723] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Two unusual normonoterpenoid indole alkaloids rauvomine A (1) and rauvomine B (2), together with two known compounds peraksine (3) and alstoyunine A (4), were isolated from the aerial parts of Rauvolfia vomitoria. The structures with absolute configurations of 1 and 2 were elucidated by spectroscopic analysis, single-crystal X-ray diffraction, and electronic circular dichroism (ECD) calculations. Compound 2 is a novel C18 normonoterpenoid indole alkaloid with a substituted cyclopropane ring that forms an unusual 6/5/6/6/3/5 hexcyclic rearranged ring system. The plausible biogenetic pathways of 1 and 2 were proposed. Compound 2 exhibited significant anti-inflammatory activity.
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Affiliation(s)
- Jun Zeng
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, China
| | - Dong-Bo Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, China
| | - Pan-Pan Zhou
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, China
| | - Qi-Li Zhang
- Gansu University of Chinese Medicine , Lanzhou 730000, China
| | - Lei Zhao
- Gansu University of Chinese Medicine , Lanzhou 730000, China
| | - Jian-Jun Chen
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, China
| | - Kun Gao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou 730000, China
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