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Li K, Wang M, Huang ZH, Wang M, Sun WY, Kurihara H, Huang RT, Wang R, Huang F, Liang L, Li YF, Duan WJ, He RR. ALOX5 inhibition protects against dopaminergic neurons undergoing ferroptosis. Pharmacol Res 2023:106779. [PMID: 37121496 DOI: 10.1016/j.phrs.2023.106779] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 04/06/2023] [Accepted: 04/21/2023] [Indexed: 05/02/2023]
Abstract
Oxidative disruption of dopaminergic neurons is regarded as a crucial pathogenesis in Parkinson's disease (PD), eventually causing neurodegenerative progression. (-)-Clausenamide (Clau) is an alkaloid isolated from plant Clausena lansium (Lour.), which is well-known as a scavenger of lipid peroxide products and exhibiting neuroprotective activities both in vivo and in vitro, yet with the in-depth molecular mechanism unrevealed. In this study, we evaluated the protective effects and mechanisms of Clau on dopaminergic neuron. Our results showed that Clau directly interacted with the Ser663 of ALOX5, the PKCα-phosphorylation site, and thus prevented the nuclear translocation of ALOX5, which was essential for catalyzing the production of toxic lipids 5-HETE. LC-MS/MS-based phospholipidomics analysis demonstrated that the oxidized membrane lipids were involved in triggering ferroptotic death in dopaminergic neurons. Furthermore, the inhibition of ALOX5 was found to significantly improving behavioral defects in PD mouse model, which was confirmed associated with the effects of attenuating the accumulation of lipid peroxides and neuronal damages. Collectively, our findings provide an attractive strategy for PD therapy by targeting ALOX5 and preventing ferroptosis in dopaminergic neurons.
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Affiliation(s)
- Kun Li
- Guangdong Engineering Research Center of Chinese Medicine & Disease Susceptibility/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE)/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research
| | - Meng Wang
- Guangdong Engineering Research Center of Chinese Medicine & Disease Susceptibility/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE)/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research
| | - Zi-Han Huang
- Guangdong Engineering Research Center of Chinese Medicine & Disease Susceptibility/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE)/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research
| | - Min Wang
- Guangdong Engineering Research Center of Chinese Medicine & Disease Susceptibility/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE)/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research
| | - Wan-Yang Sun
- Guangdong Engineering Research Center of Chinese Medicine & Disease Susceptibility/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE)/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research
| | - Hiroshi Kurihara
- Guangdong Engineering Research Center of Chinese Medicine & Disease Susceptibility/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE)/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research
| | - Rui-Ting Huang
- Guangdong Engineering Research Center of Chinese Medicine & Disease Susceptibility/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE)/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research; State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Macau, China
| | - Rong Wang
- School of Chinese Materia Medica and Yunnan Key Laboratory of Southern Medicinal Utilization, Yunnan University of Chinese Medicine, Kunming 650500, China
| | - Feng Huang
- School of Chinese Materia Medica and Yunnan Key Laboratory of Southern Medicinal Utilization, Yunnan University of Chinese Medicine, Kunming 650500, China
| | - Lei Liang
- Guangdong Engineering Research Center of Chinese Medicine & Disease Susceptibility/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE)/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research.
| | - Yi-Fang Li
- Guangdong Engineering Research Center of Chinese Medicine & Disease Susceptibility/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE)/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research.
| | - Wen-Jun Duan
- Guangdong Engineering Research Center of Chinese Medicine & Disease Susceptibility/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE)/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research.
| | - Rong-Rong He
- Guangdong Engineering Research Center of Chinese Medicine & Disease Susceptibility/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE)/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research; State Key Laboratory of Quality Research in Chinese Medicine, Macau University of Science and Technology, Macau, China; School of Chinese Materia Medica and Yunnan Key Laboratory of Southern Medicinal Utilization, Yunnan University of Chinese Medicine, Kunming 650500, China.
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Nguyen NT, Dai VV, Tri NN, Van Meervelt L, Trung NT, Dehaen W. Experimental and theoretical studies on the synthesis of 1,4,5-trisubstituted pyrrolidine-2,3-diones. Beilstein J Org Chem 2022; 18:1140-1153. [PMID: 36105726 PMCID: PMC9443309 DOI: 10.3762/bjoc.18.118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Accepted: 08/18/2022] [Indexed: 11/23/2022] Open
Abstract
Substituted 4-acetyl-3-hydroxy-3-pyrroline-2-ones have been prepared via three-component reactions and the tautomerism of these 3-pyrroline-2-ones is due to the slight difference of energy, and the significantly large rate constant of transformation between two tautomers. 1,4,5-Trisubstituted pyrrolidine-2,3-dione derivatives were prepared from the above mentioned 2-pyrrolidinone derivatives and aliphatic amines, which exist in enamine form and are stabilized by an intramolecular hydrogen bond. A possible reaction mechanism between 3-pyrroline-2-one and aliphatic amine (CH3NH2) was proposed based on computational results and the main product is formed favorably following the PES via the lowest ΔG# pathway in both the gas-phase and an ethanol solvent model. DFT calculations showed that kinetic selectivity is more significant than thermodynamic selectivity for forming main products.
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Affiliation(s)
- Nguyen Tran Nguyen
- Department of Chemistry, University of Science and Education, the University of Da Nang, Ton Duc Thang 459, 550000 Da Nang, Viet Nam
| | - Vo Viet Dai
- Department of Chemistry, University of Science and Education, the University of Da Nang, Ton Duc Thang 459, 550000 Da Nang, Viet Nam
| | - Nguyen Ngoc Tri
- Laboratory of Computational Chemistry and Modelling, Faculty of Natural Sciences, Quy Nhon University, An Duong Vuong 170, 820000 Quy Nhon, Viet Nam
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Nguyen Tien Trung
- Laboratory of Computational Chemistry and Modelling, Faculty of Natural Sciences, Quy Nhon University, An Duong Vuong 170, 820000 Quy Nhon, Viet Nam
| | - Wim Dehaen
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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Jangra A, Verma M, Kumar D, Chandrika C, Rachamalla M, Dey A, Dua K, Jha SK, Ojha S, Alexiou A, Kumar D, Jha NK. Targeting Endoplasmic Reticulum Stress using Natural Products in Neurological Disorders. Neurosci Biobehav Rev 2022; 141:104818. [DOI: 10.1016/j.neubiorev.2022.104818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/23/2022] [Accepted: 08/03/2022] [Indexed: 10/16/2022]
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Wu F, Zhang R, Feng Q, Cheng H, Xue J, Chen J. (-)-Clausenamide alleviated ER stress and apoptosis induced by OGD/R in primary neuron cultures. Neurol Res 2020; 42:730-738. [PMID: 32588767 DOI: 10.1080/01616412.2020.1771040] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
OBJECTIVE The endoplasmic reticulum stress (ERS) and ERS-related neuronal apoptosis contribute to the cerebral ischemia/reperfusion (I/R) injury. (-)-Clausenamide has been reported to be nootropic and improve learning and memory in amnesia animal models. However, whether (-)-Clau could protect neurons from ischemic injury and the possible mechanism needed further study. The present study aimed to explore the effects of (-)-Clau on primary cortical neurons treated with oxygen-glucose deprivation/reoxygenation (OGD/R). METHODS Rat primary cortical neurons were used to set up an injury model of OGD/R which imitated the clinical I/R injury. Cell viability and apoptosis were measured by CCK-8 assay, LDH detection and TUNEL staining, respectively. The activation of GRP78/eIF2α-ATF4-CHOP signaling pathway, one of the three branches of ERS, and cleaved caspase-3, the apoptotic marker, were assessed by western blotting. RESULTS OGD/R induced activation of GRP78/eIF2α-ATF4-CHOP signaling pathway. (-)-Clau significantly attenuated OGD/R-induced decrease in the cellular viability and the activation of GRP78, eIF2α, ATF4 and CHOP. To further confirm the effect of (-)-Clau on OGD/R-induced ERS activation, the ERS inducer Tunicamycin (TM) was applied. TM significantly abolished (-)-Clau's protective effect against ERS and neuronal apoptosis, indicating that the protective effect of (-)-Clau was dependent on inhibiting ERS. CONCLUSIONS The present work demonstrated for the first time that (-)-Clau could reverse the activation of GRP78/eIF2α-ATF4-CHOP branch, thus inhibited ERS and the subsequent apoptosis induced by OGD/R and promoted cell viability in vitro. (-)-Clau could serve as a promising therapeutic agent in the treatment for ischemic stroke in the future. ABBREVIATIONS ATF4: activating transcription factor-4; ATF6: activating transcription factor-6; CHOP: transcriptional induction of CCAAT/enhancer binding protein homologous protein; (-)-Clau: 3-hydroxy-4-phenyl-5a-hydroxybenzylN-methyl-g-lactam; eIF2α: eukaryotic initiation factor 2α; ER: endoplasmic reticulum; ERS: endoplasmic reticulum stress; GRP78: 78-kDa glucose regulated protein; I/R: ischemia/reperfusion; IRE1: inositol requiring enzyme-1; JNK: c-Jun N-terminal kinase; OGD/R: oxygen-glucose deprivation/reoxygenation; PERK: double-stranded RNA-dependent protein kinase-like ER kinase; TM: Tunicamycin; UPR: unfolded protein response.
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Affiliation(s)
- Fei Wu
- Institute of Neurobiology, Jining Medical University , Jining, China
| | - Rumin Zhang
- Institute of Neurobiology, Jining Medical University , Jining, China
| | - Qizhen Feng
- School of Clinical Medicine, Jining Medical University , Jining, China
| | - Hongju Cheng
- College of Basic Medicine, Jining Medical University , Jining, China
| | - Jianjun Xue
- College of Basic Medicine, Jining Medical University , Jining, China
| | - Jing Chen
- Institute of Neurobiology, Jining Medical University , Jining, China
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Sasaki Y, Tokuhara H, Ohba Y, Okabe A, Nakayama M, Nakagawa H, Skene R, Hoffman I, Zou H, Yoshida M. Efficient synthesis of tert-butyl 3-cyano-3-cyclopropyl-2-oxopyrrolidine-4-carboxylates: Highly functionalized 2-pyrrolidinone enabling access to novel macrocyclic Tyk2 inhibitors. Bioorg Med Chem Lett 2020; 30:126963. [PMID: 31980341 DOI: 10.1016/j.bmcl.2020.126963] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 01/07/2020] [Accepted: 01/09/2020] [Indexed: 12/17/2022]
Abstract
Herein we report an efficient method for the synthesis of a highly functionalized 2-pyrrolidinone, tert-butyl 3-cyano-3-cyclopropyl-2-oxopyrrolidine-4-carboxylate, from readily available starting materials. Utility of this compound was demonstrated in the synthesis of a novel series of macrocyclic Tyk2 inhibitors, leading to the identification of a potent and selective macrocyclic Tyk2 inhibitor (26).
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Affiliation(s)
- Yusuke Sasaki
- Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26‑1, Muraoka‑Higashi 2‑chome, Fujisawa, Kanagawa 251‑8555, Japan.
| | - Hidekazu Tokuhara
- Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26‑1, Muraoka‑Higashi 2‑chome, Fujisawa, Kanagawa 251‑8555, Japan
| | - Yusuke Ohba
- Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26‑1, Muraoka‑Higashi 2‑chome, Fujisawa, Kanagawa 251‑8555, Japan
| | - Atsutoshi Okabe
- Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26‑1, Muraoka‑Higashi 2‑chome, Fujisawa, Kanagawa 251‑8555, Japan
| | - Masaharu Nakayama
- Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26‑1, Muraoka‑Higashi 2‑chome, Fujisawa, Kanagawa 251‑8555, Japan
| | - Hideyuki Nakagawa
- Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26‑1, Muraoka‑Higashi 2‑chome, Fujisawa, Kanagawa 251‑8555, Japan
| | - Robert Skene
- Takeda California, Inc., 10410 Science Center Drive, San Diego, CA 92121, United States
| | - Isaac Hoffman
- Takeda California, Inc., 10410 Science Center Drive, San Diego, CA 92121, United States
| | - Hua Zou
- Takeda California, Inc., 10410 Science Center Drive, San Diego, CA 92121, United States
| | - Masato Yoshida
- Pharmaceutical Research Division, Takeda Pharmaceutical Company Limited, 26‑1, Muraoka‑Higashi 2‑chome, Fujisawa, Kanagawa 251‑8555, Japan
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Caruano J, Muccioli GG, Robiette R. Biologically active γ-lactams: synthesis and natural sources. Org Biomol Chem 2018; 14:10134-10156. [PMID: 27748489 DOI: 10.1039/c6ob01349j] [Citation(s) in RCA: 253] [Impact Index Per Article: 42.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The γ-lactam moiety is present in a large number of natural and non-natural biologically active compounds. The range of biological activities covered by these compounds is very broad. Functionalized γ-lactams are thus of high interest and have great potential in medicinal chemistry. This review provides a description of the title compounds by focusing on their synthesis, natural sources and biological activities.
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Affiliation(s)
- J Caruano
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Place Louis Pasteur 1 box L4.01.02, 1348 Louvain-la-Neuve, Belgium. and Louvain Drug Research Institute, Université catholique de Louvain, Av. E. Mounier 73 box B1.72.01, 1200 Brussels, Belgium
| | - G G Muccioli
- Louvain Drug Research Institute, Université catholique de Louvain, Av. E. Mounier 73 box B1.72.01, 1200 Brussels, Belgium
| | - R Robiette
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Place Louis Pasteur 1 box L4.01.02, 1348 Louvain-la-Neuve, Belgium.
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Chu S, Liu S, Duan W, Cheng Y, Jiang X, Zhu C, Tang K, Wang R, Xu L, Wang X, Yu X, Wu K, Wang Y, Wang M, Huang H, Zhang J. The anti-dementia drug candidate, (−)-clausenamide, improves memory impairment through its multi-target effect. Pharmacol Ther 2016; 162:179-87. [DOI: 10.1016/j.pharmthera.2016.01.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Shen DY, Nguyen TN, Wu SJ, Shiao YJ, Hung HY, Kuo PC, Kuo DH, Thang TD, Wu TS. γ- and δ-Lactams from the Leaves of Clausena lansium. JOURNAL OF NATURAL PRODUCTS 2015; 78:2521-2530. [PMID: 26523463 DOI: 10.1021/acs.jnatprod.5b00148] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Eight new clausenamides, including three γ-lactams (1-3), four δ-lactams (4-7), and an amide (8), and seven known lactams, including compounds 9-11, which were purified from natural sources for the first time, were characterized from the leaves of Clausena lansium. Their structures were elucidated using spectroscopic methods, and the absolute configurations were determined using electronic circular dichroism and single-crystal X-ray diffraction analyses with Cu Kα radiation. Compound 2 (50 μM) protected 22.24% of cortical neurons against Aβ25-35-induced cell death.
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Affiliation(s)
| | - Thi Ngan Nguyen
- Department of Chemistry, Vinh University , Vinh City, Vietnam
| | - Shwu-Jen Wu
- Department of Medical Laboratory Science and Biotechnology, Chung Hwa University of Medical Technology , Tainan 71703, Taiwan
| | - Young-Ji Shiao
- Division of Basic Chinese Medicine, National Research Institute of Chinese Medicine , Taipei 112, Taiwan
| | | | - Ping-Chung Kuo
- Department of Biotechnology, National Formosa University , Yunlin 63201, Taiwan
| | - Daih-Huang Kuo
- Department of Pharmacy and Graduate Institute of Pharmaceutical Technology, Tajen University , Pingtung 90741, Taiwan
| | - Tran Dinh Thang
- Department of Chemistry, Vinh University , Vinh City, Vietnam
| | - Tian-Shung Wu
- Department of Pharmacy and Graduate Institute of Pharmaceutical Technology, Tajen University , Pingtung 90741, Taiwan
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Szulc BR, Sil BC, Ruiz A, Hilton ST. A Common Precursor Approach to Structurally Diverse Natural Products: The Synthesis of the Core Structure of (±)-Clausenamide and the Total Synthesis of (±)-Hyalodendrin. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501256] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Transport and uptake of clausenamide enantiomers in CYP3A4-transfected Caco-2 cells: An insight into the efflux-metabolism alliance. Biochem Pharmacol 2015; 98:224-30. [DOI: 10.1016/j.bcp.2015.08.102] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 08/17/2015] [Indexed: 11/21/2022]
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Komnatnyy VV, Taveras KM, Nandurkar NS, Le Quement ST, Givskov M, Nielsen TE. Synthesis of Substituted γ- and δ-Lactams through Mannich-Type Reactions of Solid-SupportedN-Acyliminium Ions. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500054] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Chu SF, Zhang JT. Recent advances in the study of (-)clausenamide: chemistry, biological activities and mechanism of action. Acta Pharm Sin B 2014; 4:417-23. [PMID: 26579412 PMCID: PMC4629111 DOI: 10.1016/j.apsb.2014.10.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 09/24/2014] [Accepted: 10/13/2014] [Indexed: 11/18/2022] Open
Abstract
Clausenamide (clau) is one of seven novel compounds isolated from Clausena lansium (Lour) skeels. Clau is unusual in that it contains 4 chiral centers yielding 8 pairs of enantiomers. After identification of the configuration of these enantiomers, the synthesis of 16 enantiomers, including optically active clau and (+) and (–)clau was carried out. During this study, many stereochemical and synthetic difficulties were solved and the Baldwin principle was updated. Production scale is now sufficient to meet the needs of clinical practice. In a pharmacological study numerous models and indicators showed that (–)clau is the active enantiomer, while (+)clau is inactive and elicits greater toxicity than (–)clau. The principal pharmacological effects of (–)clau are to increase cognition, demonstrated in ten models of memory impairment, as well as to inhibit β-amyloid (Aβ) toxicity, blocking neurofibrillary tangle formation by inhibiting the phosphorylation of tau protein. This anti-dementia effect is characterized by increased synaptic plasticity both in efficacy and in structure and provides new support for the theory that synaptic loss is the main cause of dementia. (–)Clau is considered to be a promising drug candidate for treatment of Alzheimer׳s disease and other neurodegenerative disorders.
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Affiliation(s)
| | - Jun-tian Zhang
- Corresponding author. Tel.: +86 10 63165179; fax: +86 10 63165211.
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Yan X, Liang F, Li D, Zheng J. Ouabain elicits human glioblastoma cells apoptosis by generating reactive oxygen species in ERK-p66SHC-dependent pathway. Mol Cell Biochem 2014; 398:95-104. [PMID: 25217205 DOI: 10.1007/s11010-014-2208-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Accepted: 08/30/2014] [Indexed: 01/26/2023]
Abstract
Excessive reactive oxygen species (ROS) generation has been implicated as one of main agents in ouabain-induced anticancer effect. Unfortunately, the signaling pathways under it are not very clarified. In the present study, we investigated the molecular mechanism involved in ouabain-induced ROS generation and cell apoptosis on human U373MG and U87MG glioma cells. Ouabain-induced glioblastoma cells apoptosis and increased ROS generation. Clearance ROS by three different ROS scavenger partly, but not totally, reversed ouabain's effect on cell apoptosis. Ouabain-induced ROS generation was not regulated by calcium overload, reduced nicotinamide adenine dinucleotide phosphate oxidation, but by p66Shc phosphorylation. Ouabain treatment increased p66Shc Ser36 phosphorylation. Knockdown of p66Shc by siRNA significantly inhibited ROS generations in response to ouabain. Ouabain-induced p66Shc phosphorylation through Src/Ras/extracellular signal-regulated kinase signal pathway. Our results uncovered a novel signaling pathway with p66Shc, ouabain-induced ROS generation, and glioblastoma cell apoptosis.
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Affiliation(s)
- Xiaofei Yan
- Department of Biochemistry and Molecular Biology, Medical School, Xi'an Jiaotong University, Xi'an, 710061, Shaanxi, People's Republic of China,
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15
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Ning N, Sun J, Du G, Han N, Zhang J, Chen N. (+)-epi-Clausenamide, but not (−)-epi-clausenamide, showed more potential than (−)-clausenamide on facilitating synaptic transmission in CA1 region of hippocampal synapses. Neurosci Lett 2012; 523:99-103. [DOI: 10.1016/j.neulet.2012.06.049] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Revised: 05/03/2012] [Accepted: 06/19/2012] [Indexed: 11/28/2022]
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