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Wu W, Tang MH, Tang H, Chen K, Fu J, Wang L, Xue LL, Peng A, Ye H, Chen LJ. Identification, characterization and HPLC quantification of formulation-related impurities of honokiol, an antitumor natural drug candidate in clinical trials. J Pharm Biomed Anal 2018; 153:186-192. [PMID: 29499462 DOI: 10.1016/j.jpba.2018.02.033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Accepted: 02/16/2018] [Indexed: 02/05/2023]
Abstract
Natural products and their derivatives have historically been invaluable as a source of therapeutic agents. Honokiol, as a well-known natural product in Chinese herbal medicine Houpu, is finally being studied in a Phase I clinical trial (CTR20170822) in patients with Advanced Non-Small Cell Lung Cancer (NSCLS) in China this year. During the honokiol liposome formulation process, five major impurities were present in the range of 0.05-0.1% based on the HPLC analysis. These five major impurities were obtained from the forced degradation product of honokiol through countercurrent chromatography and prep-HPLC. The structure were elucidated with 1H NMR, 13C NMR, 2D NMR and MS spectral data. The proposed HPLC method was validated for specificity, linearity (concentration range 0.01-1.62, 0.003-0.96, 0.05-7.98, 0.04-6.52, 0.03-5.18 μg/ml for impurities I-V respectively, R2 > 0.9988), accuracy (99.11-100.67%), precision (CV < 1.6%), and sensitivity (LOD 3.3, 0.1, 16.7, 13.3, 10.0 ng/ml for impurities I-V respectively). The validated method was employed in the further study of the honokiol drug substance.
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Affiliation(s)
- Wenshuang Wu
- Department of Thyroid Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China; Lab of Natural Product Drugs, Cancer Center, West China Medical School, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Ming-Hai Tang
- Lab of Natural Product Drugs, Cancer Center, West China Medical School, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Huan Tang
- Lab of Natural Product Drugs, Cancer Center, West China Medical School, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Kai Chen
- Lab of Natural Product Drugs, Cancer Center, West China Medical School, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China; Institute for Chemical Engineering, Chengdu, Sichuan University, China
| | - Jie Fu
- Chengdu Jinrui Foundation Biotechnology Co., Ltd., Yizhou Avenue, High Tech Zone, Chengdu, Sichuan Province, China
| | - Lun Wang
- Lab of Natural Product Drugs, Cancer Center, West China Medical School, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China; Institute for Chemical Engineering, Chengdu, Sichuan University, China
| | - Lin-Lin Xue
- Lab of Natural Product Drugs, Cancer Center, West China Medical School, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Aihua Peng
- Lab of Natural Product Drugs, Cancer Center, West China Medical School, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Haoyu Ye
- Lab of Natural Product Drugs, Cancer Center, West China Medical School, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China; Chengdu Jinrui Foundation Biotechnology Co., Ltd., Yizhou Avenue, High Tech Zone, Chengdu, Sichuan Province, China.
| | - Li-Juan Chen
- Lab of Natural Product Drugs, Cancer Center, West China Medical School, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
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Luc Brunsveld. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201709653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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3
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Luc Brunsveld. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/anie.201709653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Scheepstra M, Andrei SA, Unver MY, Hirsch AKH, Leysen S, Ottmann C, Brunsveld L, Milroy LG. Designed Spiroketal Protein Modulation. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Marcel Scheepstra
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS); Department of Biomedical Engineering; Technische Universiteit Eindhoven; Den Dolech 2 5612 AZ Eindhoven The Netherlands
| | - Sebastian A. Andrei
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS); Department of Biomedical Engineering; Technische Universiteit Eindhoven; Den Dolech 2 5612 AZ Eindhoven The Netherlands
| | - M. Yagiz Unver
- Stratingh Institute for Chemistry; University of Groningen; Nijenborgh 7 9747AG Groningen The Netherlands
| | - Anna K. H. Hirsch
- Stratingh Institute for Chemistry; University of Groningen; Nijenborgh 7 9747AG Groningen The Netherlands
| | - Seppe Leysen
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS); Department of Biomedical Engineering; Technische Universiteit Eindhoven; Den Dolech 2 5612 AZ Eindhoven The Netherlands
| | - Christian Ottmann
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS); Department of Biomedical Engineering; Technische Universiteit Eindhoven; Den Dolech 2 5612 AZ Eindhoven The Netherlands
- Department of Chemistry; University of Duisburg-Essen; Universitätstr. 7 45141 Essen Germany
| | - Luc Brunsveld
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS); Department of Biomedical Engineering; Technische Universiteit Eindhoven; Den Dolech 2 5612 AZ Eindhoven The Netherlands
| | - Lech-Gustav Milroy
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS); Department of Biomedical Engineering; Technische Universiteit Eindhoven; Den Dolech 2 5612 AZ Eindhoven The Netherlands
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Scheepstra M, Andrei SA, Unver MY, Hirsch AKH, Leysen S, Ottmann C, Brunsveld L, Milroy LG. Designed Spiroketal Protein Modulation. Angew Chem Int Ed Engl 2017; 56:5480-5484. [PMID: 28407400 PMCID: PMC5435924 DOI: 10.1002/anie.201612504] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 02/17/2017] [Indexed: 02/03/2023]
Abstract
Spiroketals are structural motifs found in many biologically active natural products, which has stimulated considerable efforts toward their synthesis and interest in their use as drug lead compounds. Despite this, the use of spiroketals, and especially bisbenzanulated spiroketals, in a structure-based drug discovery setting has not been convincingly demonstrated. Herein, we report the rational design of a bisbenzannulated spiroketal that potently binds to the retinoid X receptor (RXR) thereby inducing partial co-activator recruitment. We solved the crystal structure of the spiroketal-hRXRα-TIF2 ternary complex, and identified a canonical allosteric mechanism as a possible explanation for the partial agonist behavior of our spiroketal. Our co-crystal structure, the first of a designed spiroketal-protein complex, suggests that spiroketals can be designed to selectively target other nuclear receptor subtypes.
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Affiliation(s)
- Marcel Scheepstra
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ, Eindhoven, The Netherlands
| | - Sebastian A Andrei
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ, Eindhoven, The Netherlands
| | - M Yagiz Unver
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 7, 9747AG, Groningen, The Netherlands
| | - Anna K H Hirsch
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 7, 9747AG, Groningen, The Netherlands
| | - Seppe Leysen
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ, Eindhoven, The Netherlands
| | - Christian Ottmann
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ, Eindhoven, The Netherlands.,Department of Chemistry, University of Duisburg-Essen, Universitätstr. 7, 45141, Essen, Germany
| | - Luc Brunsveld
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ, Eindhoven, The Netherlands
| | - Lech-Gustav Milroy
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Technische Universiteit Eindhoven, Den Dolech 2, 5612 AZ, Eindhoven, The Netherlands
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Zheng W, Lu Y, Lin S, Wang R, Qiu L, Zhu Y, Yao B, Guo F, Jin S, Jin L, Li Y. A Novel Class of Natural FXR Modulators with a Unique Mode of Selective Co-regulator Assembly. Chembiochem 2017; 18:721-725. [PMID: 28186695 DOI: 10.1002/cbic.201700059] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Indexed: 12/13/2022]
Abstract
The farnesoid X receptor (FXR) is an important target for drug discovery. Small molecules induce a conformational change in FXR that modulates its binding to co-regulators, thus resulting in distinct FXR functional profiles. However, the mechanisms for selectively recruiting co-regulators by FXR remain elusive, partly because of the lack of FXR-selective modulators. We report the identification of two natural terpenoids, tschimgine and feroline, as novel FXR modulators. Remarkably, their crystal structures uncovered a secondary binding pocket important for ligand binding. Further, tschimgine or feroline induced dynamic conformational changes in the activation function 2 (AF-2) surface, thus leading to differential co-regulator recruiting profiles, modulated by both hydrophobic and selective hydrogen-bond interactions unique to specific co-regulators. Our findings thus provide a novel structure template for optimization for FXR-selective modulators of clinical value.
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Affiliation(s)
- Weili Zheng
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Innovation Center for Cell Signaling Network, Xiamen University, Xiamen, Fujian, 361005, China
| | - Yi Lu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Innovation Center for Cell Signaling Network, Xiamen University, Xiamen, Fujian, 361005, China
| | - Shengchen Lin
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Innovation Center for Cell Signaling Network, Xiamen University, Xiamen, Fujian, 361005, China
| | - Rui Wang
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Innovation Center for Cell Signaling Network, Xiamen University, Xiamen, Fujian, 361005, China
| | - Lin Qiu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Innovation Center for Cell Signaling Network, Xiamen University, Xiamen, Fujian, 361005, China
| | - Yanlin Zhu
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Innovation Center for Cell Signaling Network, Xiamen University, Xiamen, Fujian, 361005, China
| | - Benqiang Yao
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Innovation Center for Cell Signaling Network, Xiamen University, Xiamen, Fujian, 361005, China
| | - Fusheng Guo
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Innovation Center for Cell Signaling Network, Xiamen University, Xiamen, Fujian, 361005, China
| | - Shikai Jin
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Innovation Center for Cell Signaling Network, Xiamen University, Xiamen, Fujian, 361005, China
| | - Lihua Jin
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Innovation Center for Cell Signaling Network, Xiamen University, Xiamen, Fujian, 361005, China
| | - Yong Li
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Innovation Center for Cell Signaling Network, Xiamen University, Xiamen, Fujian, 361005, China
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