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Tang Q, Lu Y, Song J, He Z, Xu JB, Tan J, Gao F, Li X. Light-promoted stereoselective late-stage difunctionalization and anti-tumor activity of oridonin. Fitoterapia 2024; 177:106131. [PMID: 39067489 DOI: 10.1016/j.fitote.2024.106131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 07/17/2024] [Accepted: 07/20/2024] [Indexed: 07/30/2024]
Abstract
The late-stage difunctionalization of diterpene oridonin by light-promoted direct oxyamination with various O-benzoylhydroxylamines was carried out to afford C16α-N-C17-OBz-oridonin derivatives (1-25) for the first time. Though as a radical reaction, it features high stereoselectivity to only produce C16α-N-C17-OBz-oridonins. The in vitro antiproliferative activity of these C16α-N-C17-OBz-oridonins against the human breast cancer cell lines (MCF-7) was evaluated by MTT assay, showing that most of the synthesized compounds possessed moderate anticancer activity against MCF-7 cell lines superior or similar to the parent compound oridonin. The derivative 25 with a N-methyl-N-(naphthalen-1-ylmethyl) substitution showed better cytotoxicity against MCF-7 cells (IC50 value of 11.75 μM) than oridonin (IC50 value of 17.95 μM).
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Affiliation(s)
- Qianhui Tang
- School of Life Science and Engineering, Southwest Jiaotong University, No. 111, Erhuan Rd, Chengdu 610031, PR China
| | - Yougan Lu
- School of Life Science and Engineering, Southwest Jiaotong University, No. 111, Erhuan Rd, Chengdu 610031, PR China
| | - Junying Song
- School of Life Science and Engineering, Southwest Jiaotong University, No. 111, Erhuan Rd, Chengdu 610031, PR China
| | - Zhengyang He
- School of Life Science and Engineering, Southwest Jiaotong University, No. 111, Erhuan Rd, Chengdu 610031, PR China
| | - Jin-Bu Xu
- School of Life Science and Engineering, Southwest Jiaotong University, No. 111, Erhuan Rd, Chengdu 610031, PR China
| | - Jiao Tan
- School of Pharmacy, Chongqing Medical and Pharmaceutical College, No.82, University Town Central Road, Chongqing 401331, PR China
| | - Feng Gao
- School of Life Science and Engineering, Southwest Jiaotong University, No. 111, Erhuan Rd, Chengdu 610031, PR China
| | - Xiaohuan Li
- School of Life Science and Engineering, Southwest Jiaotong University, No. 111, Erhuan Rd, Chengdu 610031, PR China.
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Sun L, Wang XM, Tang Q, Xiao Y, Xu JB, Zhang TT, Liu YJ, Li X, Gao F. Lathyrane and premyrsinane Euphorbia diterpenes against Alzheimer's disease: Bioinspired synthesis, anti-cholinesterase and neuroprotection bioactivity. Bioorg Chem 2024; 147:107377. [PMID: 38653150 DOI: 10.1016/j.bioorg.2024.107377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 04/10/2024] [Accepted: 04/14/2024] [Indexed: 04/25/2024]
Abstract
The first systematic acylated diversification of naturally scarce premyrsinane diterpenes, together with their biosynthetic precursors lathyrane diterpene were carried out. Two new series of premyrsinane derivates (1a-32a) and lathyrane derivates (1-32) were synthesized from the naturally abundant lathyrane diterpene Euphorbia factor L3 through a bioinspired approach. The cholinesterase inhibitory and neuroprotective activities of these diterpenes were investigated to explore potential anti-Alzheimer's disease (AD) bioactive lead compounds. In general, the lathyrane diterpenes showed the better acetylcholinesterase (AChE) inhibitory activity than that of premyrsinanes. The lathyrane derivative 17 bearing a 3-dimethylaminobenzoyl moiety showed the best AChE inhibition effect with the IC50 value of 7.1 μM. Molecular docking demonstrated that 17 could bond with AChE well (-8 kal/mol). On the other hand, premyrsinanes showed a better neuroprotection profile against H2O2-induced injury in SH-SY5Y cells. Among them, the premyrsinane diterpene 16a had significant neuroprotective effect with the cell viability rate of 113.5 % at 12.5 μM (the model group with 51.2 %). The immunofluorescence, western blot and reactive oxygen species (ROS) analysis were conducted to demonstrate the mechanism of 16a. Furthermore, a preliminary SAR analysis of the two categories of diterpenes was performed to provide the insights for anti-AD drug development.
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Affiliation(s)
- Lian Sun
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, Key Laboratory of Advanced Technologies of Material, Minister of Education, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China
| | - Xin-Ming Wang
- Department of Pharmacy, The First Affiliated Hospital, School of Clinical Medicine, Chengdu Medical College, Chengdu 610500, PR China
| | - Qianhui Tang
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, Key Laboratory of Advanced Technologies of Material, Minister of Education, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China
| | - Yao Xiao
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, Key Laboratory of Advanced Technologies of Material, Minister of Education, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China
| | - Jin-Bu Xu
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, Key Laboratory of Advanced Technologies of Material, Minister of Education, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China
| | - Tong-Tong Zhang
- The Center of Gastrointestinal and Minimally Invasive Surgery, Department of General Surgery, The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, Chengdu 610031, PR China
| | - Yan-Jun Liu
- The Center of Gastrointestinal and Minimally Invasive Surgery, Department of General Surgery, The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, Chengdu 610031, PR China.
| | - Xiaohuan Li
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, Key Laboratory of Advanced Technologies of Material, Minister of Education, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China.
| | - Feng Gao
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, Key Laboratory of Advanced Technologies of Material, Minister of Education, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China.
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Jin Y, Guo Z, Zhu H, Zhang Z, Jiang X, Yang Y, Liu P, Yang Y, Wang M, Gao H. Discovery of potential components characteristic by conjugated enone from the branches and leaves of Croton lauioides with anti-neuroinflammatory activity via regulating the NF-κB pathway. Bioorg Chem 2024; 146:107301. [PMID: 38522392 DOI: 10.1016/j.bioorg.2024.107301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 03/03/2024] [Accepted: 03/19/2024] [Indexed: 03/26/2024]
Abstract
In this study, the chemical composition and pharmacological activity of Croton lauioides were investigated for the first time. The bioactive and HPLC-UV guided isolation led to the discovery of twenty-three conjugated enone-type components (1-23), including nine previously unknown sesquiterpenoid derivatives (1-4, 9-10, 12-14). Notably, compounds 1 and 12 are epoxides containing an endoperoxide bridge (1) or a unique dioxaspiro core (12), respectively. Compounds 2-7 are non-benzenoid aromatics featuring a tropone function, while 9-11 possess a rare rearranged scaffold with tropone shift into benzene. Extensive characterization was performed using NMR spectra, HRESIMS data, and electronic circular dichroism (ECD) calculations. Furthermore, we evaluated the bioactivities of all isolated compounds against neuroinflammation in LPS-stimulated BV-2 microglial cells. Remarkably, most sesquiterpenoid derivatives exhibited significant NO inhibit activities, and compound 5 showed the most potent effect with an IC50 value of 0.14 ± 0.04 μM. Structure-activity relationship (SAR) analysis revealed that sesquiterpenoids modified with endocyclic enone conjugation may serve as a key pharmacophore for NO inhibition, particularly involving aromatic tropone moiety. The qPCR and Western blot results demonstrated that 5 exerted an inhibitory effect on the mRNA levels of iNOS, TNF-α and COX-2 in a time-dependent manner, as well as suppressed the protein expression of iNOS, TNF-α, COX-2. In mechanism, 5 could prevented activation of NF-κB pathway by suppressing phosphorylation of p65 and IκB-α. These findings revealed C. lauioides might be a promising resource for drug candidate development targeting neuroinflammation.
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Affiliation(s)
- Yue Jin
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Zongxin Guo
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Huilin Zhu
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Zixuan Zhang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Xiaowen Jiang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Yiren Yang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Pengyu Liu
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Yu Yang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Miao Wang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China.
| | - Huiyuan Gao
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Pharmacodynamic Substances Research & Translational Medicine of Immune Diseases of Shenyang, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China; Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China.
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Escobar-Montaño F, Macías-Sánchez AJ, Botubol-Ares JM, Durán-Patrón R, Hernández-Galán R. A Biomimetic Approach to Premyrsinane-Type Diterpenoids: Exploring Microbial Transformation to Enhance Their Chemical Diversity. PLANTS (BASEL, SWITZERLAND) 2024; 13:842. [PMID: 38592850 PMCID: PMC10975351 DOI: 10.3390/plants13060842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 03/11/2024] [Accepted: 03/12/2024] [Indexed: 04/11/2024]
Abstract
Premyrsinane-type diterpenoids have been considered to originate from the cyclization of a suitable 5,6- or 6,17-epoxylathyrane precursor. Their biological activities have not been sufficiently explored to date, so the development of synthetic or microbial approaches for the preparation of new derivatives would be desirable. Epoxyboetirane A (4) is an 6,17-epoxylathyrane isolated from Euphorbia boetica in a large enough amount to be used in semi-synthesis. Transannular cyclization of 4 mediated by Cp2TiIIICl afforded premyrsinane 5 in good yield as an only diasteroisomer. To enhance the structural diversity of premyrsinanes so their potential use in neurodegenerative disorders could be explored, compound 5 was biotransformed by Mucor circinelloides NRRL3631 to give rise to hydroxylated derivatives at non-activated carbons (6-7), all of which were reported here for the first time. The structures and absolute configurations of all compounds were determined through extensive NMR and HRESIMS spectroscopic studies.
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Affiliation(s)
- Felipe Escobar-Montaño
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain; (F.E.-M.); (A.J.M.-S.); (R.H.-G.)
| | - Antonio J. Macías-Sánchez
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain; (F.E.-M.); (A.J.M.-S.); (R.H.-G.)
- Instituto Universitario de Investigación en Biomoléculas, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
| | - José M. Botubol-Ares
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain; (F.E.-M.); (A.J.M.-S.); (R.H.-G.)
- Instituto Universitario de Investigación Vitivinícola y Agroalimentaria, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
| | - Rosa Durán-Patrón
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain; (F.E.-M.); (A.J.M.-S.); (R.H.-G.)
- Instituto Universitario de Investigación en Biomoléculas, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
| | - Rosario Hernández-Galán
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain; (F.E.-M.); (A.J.M.-S.); (R.H.-G.)
- Instituto Universitario de Investigación en Biomoléculas, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
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