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Wong ILK, Wang XK, Liu Z, Sun W, Li FX, Wang BC, Li P, Wan SB, Chow LMC. Synthesis and evaluation of stereoisomers of methylated catechin and epigallocatechin derivatives on modulating P-glycoprotein-mediated multidrug resistance in cancers. Eur J Med Chem 2021; 226:113795. [PMID: 34597896 DOI: 10.1016/j.ejmech.2021.113795] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 07/13/2021] [Accepted: 08/20/2021] [Indexed: 11/15/2022]
Abstract
P-glycoprotein (P-gp; ABCB1)-mediated drug efflux causes multidrug resistance in cancer. Previous synthetic methylated epigallocatechin (EGC) possessed promising P-gp modulating activity. In order to further improve the potency, we have synthesized some novel stereoisomers of methylated epigallocatechin (EGC) and gallocatechin (GC) as well as epicatechin (EC) and catechin (C). The (2R, 3S)-trans-methylated C derivative 25 and the (2R, 3R)-cis-methylated EC derivative 31, both containing dimethyoxylation at ring B, tri-methoxylation at ring D and oxycarbonylphenylcarbamoyl linker between ring D and C3, are the most potent in reversing P-gp mediated drug resistance with EC50 ranged from 32 nM to 93 nM. They are non-toxic to fibroblast with IC50 > 100 μM. They can inhibit the P-gp mediated drug efflux and restore the intracellular drug concentration to a cytotoxic level. They do not downregulate surface P-gp protein level to enhance drug retention. They are specific for P-gp with no or low modulating activity towards MRP1- or BCRP-mediated drug resistance. In summary, methylated C 25 and EC 31 derivatives represent a new class of potent, specific and non-toxic P-gp modulator.
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Affiliation(s)
- Iris L K Wong
- Department of Applied Biology and Chemical Technology and State Key Laboratory of Chemical Biology and Drug Discovery, Hong Kong Polytechnic University, Hong Kong, China
| | - Xing-Kai Wang
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Zhen Liu
- Department of Applied Biology and Chemical Technology and State Key Laboratory of Chemical Biology and Drug Discovery, Hong Kong Polytechnic University, Hong Kong, China; Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Wenqin Sun
- Department of Applied Biology and Chemical Technology and State Key Laboratory of Chemical Biology and Drug Discovery, Hong Kong Polytechnic University, Hong Kong, China
| | - Fu-Xing Li
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Bao-Chao Wang
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Peng Li
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Sheng-Biao Wan
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
| | - Larry M C Chow
- Department of Applied Biology and Chemical Technology and State Key Laboratory of Chemical Biology and Drug Discovery, Hong Kong Polytechnic University, Hong Kong, China.
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Zhang YH, Cui SX, Wan SB, Wu SH, Qu XJ. Increased S1P induces S1PR2 internalization to blunt the sensitivity of colorectal cancer to 5-fluorouracil via promoting intracellular uracil generation. Acta Pharmacol Sin 2021; 42:460-469. [PMID: 32647340 PMCID: PMC8027438 DOI: 10.1038/s41401-020-0460-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 06/07/2020] [Indexed: 12/15/2022] Open
Abstract
Sphingosine-1-phosphate (S1P), the backbone of most sphingolipids, activating S1P receptors (S1PRs) and the downstream G protein signaling has been implicated in chemoresistance. In this study we investigated the role of S1PR2 internalization in 5-fluorouracil (5-FU) resistance in human colorectal cancer (CRC). Clinical data of randomly selected 60 CRC specimens showed the correlation between S1PR2 internalization and increased intracellular uracil (P < 0.001). Then we explored the regulatory mechanisms in CRC model of villin-S1PR2-/- mice and CRC cell lines. We showed that co-administration of S1P promoted S1PR2 internalization from plasma membrane (PM) to endoplasmic reticulum (ER), thus blunted 5-FU efficacy against colorectal tumors in WT mice, compared to that in S1PR2-/- mice. In HCT116 and HT-29 cells, application of S1P (10 μM) empowered S1PR2 to internalize from PM to ER, thus inducing 5-FU resistance, whereas the specific S1PR2 inhibitor JTE-013 (10 μM) effectively inhibited S1P-induced S1PR2 internalization. Using Mag-Fluo-AM-labeling [Ca2+]ER and LC-ESI-MS/MS, we revealed that internalized S1PR2 triggered elevating [Ca2+]ER levels to activate PERK-eLF2α-ATF4 signaling in HCT116 cells. The activated ATF4 upregulated RNASET2-mediated uracil generation, which impaired exogenous 5-FU uptake to blunt 5-FU therapy. Overall, this study reveals a previously unrecognized mechanism of 5-FU resistance resulted from S1PR2 internalization-upregulated uracil generation in colorectal cancer, and provides the novel insight into the significance of S1PR2 localization in predicting the benefit of CRC patients from 5-FU-based chemotherapy.
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Affiliation(s)
- Yu-Hang Zhang
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China
| | - Shu-Xiang Cui
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing 100069, China
| | - Sheng-Biao Wan
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266100, China
| | - Shu-Hua Wu
- Department of Pathology, Hospital of Binzhou Medical University, Binzhou 264003, China
| | - Xian-Jun Qu
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing 100069, China.
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3
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Zhang YH, Luo DD, Wan SB, Qu XJ. Corrigendum to "S1PR2 inhibitors potently reverse 5-FU resistance by downregulating DPD expression in colorectal cancer" [Pharmacol Res. 155 (2020) 104717]. Pharmacol Res 2020; 159:104834. [PMID: 32473828 DOI: 10.1016/j.phrs.2020.104834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yu-Hang Zhang
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Dong-Dong Luo
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
| | - Sheng-Biao Wan
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China.
| | - Xian-Jun Qu
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China.
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Zhang YH, Luo DD, Wan SB, Qu XJ. S1PR2 inhibitors potently reverse 5-FU resistance by downregulating DPD expression in colorectal cancer. Pharmacol Res 2020; 155:104717. [PMID: 32088343 DOI: 10.1016/j.phrs.2020.104717] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 02/06/2020] [Accepted: 02/17/2020] [Indexed: 12/19/2022]
Abstract
In this study, S1PR2 was reckoned as a brand-new GPCR target for designing inhibitors to reverse 5-FU resistance. Herein a series of pyrrolidine pyrazoles as the S1PR2 inhibitors were designed, synthesized and evaluated for their activities of anti-FU-resistance. Among them, the most promising compound JTE-013, exhibited excellent inhibition on DPD expression and potent anti-FU-resistance activity in various human cancer cell lines, along with the in vivo HCT116DPD cells xenograft model, in which the inhibition rate of 5-FU was greatly increased from 13.01%-75.87%. The underlying mechanism was uncovered that JTE-013 demonstrated an anti-FU-resistance activity by blocking S1PR2 internalization to the endoplasmic reticulum (ER), which inhibited the degradation of 5-FU into α-fluoro-β-alanine (FBAL) by downregulating tumoral DPD expression. Overall, JTE-013 could serve as the lead compound for the discovery of new anti-FU-resistance drugs. SIGNIFICANCE: This study provides novel insights that S1PR2 inhibitors could sensitize 5-FU therapy in colorectal cancer.
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Affiliation(s)
- Yu-Hang Zhang
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China
| | - Dong-Dong Luo
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
| | - Sheng-Biao Wan
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China.
| | - Xian-Jun Qu
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069, China.
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Lv XJ, Zhao WW, Chen YH, Wan SB, Liu YK. Organocatalytic asymmetric synthesis of both cis- and trans-configured pyrano[2,3-b]chromenes via different dehydration pathways. Org Chem Front 2019. [DOI: 10.1039/c9qo00366e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The enamine-catalyzed [3 + 3]-cycloaddition between chroman-2-ols and β,γ-unsaturated α-ketoesters is developed to access both enantiomers of cis- and trans-fused pyrano[2,3-b]chromene derivatives.
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Affiliation(s)
- Xue-Jiao Lv
- Key Laboratory of Marine Drugs
- Chinese Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
- Qingdao 266003
| | - Wei-Wei Zhao
- Key Laboratory of Marine Drugs
- Chinese Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
- Qingdao 266003
| | - Ying-Han Chen
- Key Laboratory of Marine Drugs
- Chinese Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
- Qingdao 266003
| | - Sheng-Biao Wan
- Key Laboratory of Marine Drugs
- Chinese Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
- Qingdao 266003
| | - Yan-Kai Liu
- Key Laboratory of Marine Drugs
- Chinese Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
- Qingdao 266003
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6
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Luo DD, Peng K, Yang JY, Piyachaturawat P, Saengsawang W, Ao L, Zhao WZ, Tang Y, Wan SB. Structural modification of oridonin via DAST induced rearrangement. RSC Adv 2018; 8:29548-29554. [PMID: 35547324 PMCID: PMC9085272 DOI: 10.1039/c8ra05728a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 08/10/2018] [Indexed: 01/05/2023] Open
Abstract
A novel and concise synthetic approach for the preparation of 6,20-epoxy ent-kaurane diterpenoid from oridonin was established.
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Affiliation(s)
- Dong-Dong Luo
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology
- Key Laboratory of Marine Drugs
- Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
| | - Kai Peng
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology
- Key Laboratory of Marine Drugs
- Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
| | - Jia-Yu Yang
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology
- Key Laboratory of Marine Drugs
- Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
| | | | - Witchuda Saengsawang
- Department of Physiology
- Faculty of Science
- Mahidol University
- Bangkok 10400
- Thailand
| | - Lei Ao
- The Nanjing Han & Zaenker Cancer Institute (NHZCI)
- Nanjing OGpharma Co. Ltd
- Nanjing 210036
- China
| | - Wan-Zhou Zhao
- The Nanjing Han & Zaenker Cancer Institute (NHZCI)
- Nanjing OGpharma Co. Ltd
- Nanjing 210036
- China
| | - Yu Tang
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology
- Key Laboratory of Marine Drugs
- Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
| | - Sheng-Biao Wan
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology
- Key Laboratory of Marine Drugs
- Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
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7
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Li M, Zhao SZ, Zhao CZ, Zhang Y, Xia H, Lopez-Baltazar J, Wan SB, Wang XJ. Cloning and characterization of SPL-family genes in the peanut (Arachis hypogaea L.). Genet Mol Res 2016; 15:gmr7344. [PMID: 26909986 DOI: 10.4238/gmr.15017344] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
SQUAMOSA promoter-binding protein-like (SPL) proteins play crucial roles in plant growth, development, and responses to environmental stressors. The peanut (Arachis hypogaea L.) is a globally important oil crop. In this study, we cloned the full-length cDNA of 15 SPLs in the peanut by transcriptome sequencing and rapid amplification of cDNA ends, and analyzed their genomic DNA sequences. cDNA lengths varied significantly, from 369 to 3102 bp. The SBP domain of the peanut SPL proteins was highly conserved compared to SPLs in other plant species. Based on their sequence similarity to SPLs from other plant species, the peanut SPLs could be grouped into five subgroups. In each subgroup, lengths of individual genes, conserved motif numbers, and distribution patterns were similar. Seven of the SPLs were predicted to be targets of miR156. The SPLs were ubiquitously expressed in the roots, leaves, flowers, gynophores, and seeds, with different expression levels and accumulation patterns. Significant differences in the expression of most of the SPLs were observed between juvenile and adult leaves, suggesting that they are involved in developmental regulation. Dynamic changes occurred in transcript levels at stage 1 (aerial grown green gynophores), stage 2 (gynophores buried in soil for about three days), and stage 3 (gynophores buried in soil for about nine days with enlarged pods). Possible roles that these genes play in peanut pod initiation are discussed.
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Affiliation(s)
- M Li
- Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, Shandong Province, China
| | - S Z Zhao
- Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, Shandong Province, China
| | - C Z Zhao
- Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, Shandong Province, China
| | - Y Zhang
- Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, Shandong Province, China
| | - H Xia
- Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, Shandong Province, China
| | | | - S B Wan
- Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, Shandong Province, China
| | - X J Wang
- Biotechnology Research Center, Shandong Academy of Agricultural Sciences, Shandong Provincial Key Laboratory of Crop Genetic Improvement, Ecology and Physiology, Jinan, Shandong Province, China
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8
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Wong ILK, Wang BC, Yuan J, Duan LX, Liu Z, Liu T, Li XM, Hu X, Zhang XY, Jiang T, Wan SB, Chow LMC. Potent and Nontoxic Chemosensitizer of P-Glycoprotein-Mediated Multidrug Resistance in Cancer: Synthesis and Evaluation of Methylated Epigallocatechin, Gallocatechin, and Dihydromyricetin Derivatives. J Med Chem 2015; 58:4529-49. [DOI: 10.1021/acs.jmedchem.5b00085] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Iris L. K. Wong
- Department
of Applied Biology and Chemical Technology, and State Key Laboratory
of Chirosciences, The Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, China
| | - Bao-Chao Wang
- Key
Laboratory of Marine Drugs, Ministry of Education, Shandong Provincial
Key Laboratory of Glycoscience & Glycotechnology, School of Medicine
and Pharmacy, Ocean University of China, Qingdao, China
| | - Jian Yuan
- Key
Laboratory of Marine Drugs, Ministry of Education, Shandong Provincial
Key Laboratory of Glycoscience & Glycotechnology, School of Medicine
and Pharmacy, Ocean University of China, Qingdao, China
| | - Liang-Xing Duan
- Key
Laboratory of Marine Drugs, Ministry of Education, Shandong Provincial
Key Laboratory of Glycoscience & Glycotechnology, School of Medicine
and Pharmacy, Ocean University of China, Qingdao, China
| | - Zhen Liu
- Key
Laboratory of Marine Drugs, Ministry of Education, Shandong Provincial
Key Laboratory of Glycoscience & Glycotechnology, School of Medicine
and Pharmacy, Ocean University of China, Qingdao, China
| | - Tao Liu
- Key
Laboratory of Marine Drugs, Ministry of Education, Shandong Provincial
Key Laboratory of Glycoscience & Glycotechnology, School of Medicine
and Pharmacy, Ocean University of China, Qingdao, China
| | - Xue-Min Li
- Key
Laboratory of Marine Drugs, Ministry of Education, Shandong Provincial
Key Laboratory of Glycoscience & Glycotechnology, School of Medicine
and Pharmacy, Ocean University of China, Qingdao, China
| | - Xuesen Hu
- Department
of Applied Biology and Chemical Technology, and State Key Laboratory
of Chirosciences, The Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, China
| | - Xiao-Yu Zhang
- Key
Laboratory of Marine Drugs, Ministry of Education, Shandong Provincial
Key Laboratory of Glycoscience & Glycotechnology, School of Medicine
and Pharmacy, Ocean University of China, Qingdao, China
| | - Tao Jiang
- Key
Laboratory of Marine Drugs, Ministry of Education, Shandong Provincial
Key Laboratory of Glycoscience & Glycotechnology, School of Medicine
and Pharmacy, Ocean University of China, Qingdao, China
| | - Sheng-Biao Wan
- Key
Laboratory of Marine Drugs, Ministry of Education, Shandong Provincial
Key Laboratory of Glycoscience & Glycotechnology, School of Medicine
and Pharmacy, Ocean University of China, Qingdao, China
| | - Larry M. C. Chow
- Department
of Applied Biology and Chemical Technology, and State Key Laboratory
of Chirosciences, The Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR, China
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Dou QP, Landis-Piwowar KR, Chen D, Huo C, Wan SB, Chan TH. Green tea polyphenols as a natural tumour cell proteasome inhibitor. Inflammopharmacology 2009; 16:208-12. [PMID: 18815743 DOI: 10.1007/s10787-008-8017-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The cancer-preventive effects of green tea and its main constituent (-)-epigallocatechin gallate [(-)-EGCG] are widely supported by results from epidemiological, cell culture, animal and clinical studies although the molecular target has not been well defined. We previously reported that ester bond-containing tea polyphenols, e. g. (-)-EGCG, and their synthetic analogs potently and specifically inhibited the proteasomal activity. Subsequently, we further demonstrated that methylation on green tea polyphenols under physiological conditions decreased their proteasome-inhibitory activity, contributing to decreased cancer-preventive effects of tea consumption. Since (-)-EGCG is unstable under physiological conditions, we also developed the peracetate-protected or prodrug form of (-)-EGCG, Pro-EGCG (1), and shown that Pro-EGCG (1) increases the bioavailability, stability, and proteasome-inhibitory and anticancer activities of (-)-EGCG in human breast cancer cells and xenografts, suggesting its potential use for cancer prevention and treatment.
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Affiliation(s)
- Q P Dou
- The Prevention Program, Barbara Ann Karmanos Cancer Institute and Department of Pathology, School of Medicine, Wayne State University, 540.1 HWCRC, 4100 John R Rd, Detroit, Michigan 48201, USA.
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Chen D, Milacic V, Chen MS, Wan SB, Lam WH, Huo C, Landis-Piwowar KR, Cui QC, Wali A, Chan TH, Dou QP. Tea polyphenols, their biological effects and potential molecular targets. Histol Histopathol 2008; 23:487-96. [PMID: 18228206 DOI: 10.14670/hh-23.487] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Tea is the most popular beverage in the world, second only to water. Tea contains an infusion of the leaves from the Camellia sinensis plant rich in polyphenolic compounds known as catechins, the most abundant of which is (-)-EGCG. Although tea has been consumed for centuries, it has only recently been studied extensively as a health-promoting beverage that may act to prevent a number of chronic diseases and cancers. The results of several investigations indicate that green tea consumption may be of modest benefit in reducing the plasma concentration of cholesterol and preventing atherosclerosis. Additionally, the cancer-preventive effects of green tea are widely supported by results from epidemiological, cell culture, animal and clinical studies. In vitro cell culture studies show that tea polyphenols potently induce apoptotic cell death and cell cycle arrest in tumor cells but not in their normal cell counterparts. Green tea polyphenols were shown to affect several biological pathways, including growth factor-mediated pathway, the mitogen-activated protein (MAP) kinase-dependent pathway, and ubiquitin/proteasome degradation pathways. Various animal studies have revealed that treatment with green tea inhibits tumor incidence and multiplicity in different organ sites such as skin, lung, liver, stomach, mammary gland and colon. Recently, phase I and II clinical trials have been conducted to explore the anticancer effects of green tea in humans. A major challenge of cancer prevention is to integrate new molecular findings into clinical practice. Therefore, identification of more molecular targets and biomarkers for tea polyphenols is essential for improving the design of green tea trials and will greatly assist in a better understanding of the mechanisms underlying its anti-cancer activity.
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Affiliation(s)
- D Chen
- The Prevention Program, Barbara Ann Karmanos Cancer Institute and Department of Pathology, School of Medicine, Wayne State University, Detroit, Michigan 48201, USA
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11
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Wan SB, Yi X, Guo ZR. [Three dimensional quantitative structure-activity relationship of farnesyl protein transferase inhibitors]. Yao Xue Xue Bao 2001; 36:423-6. [PMID: 12585125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
AIM To build a three dimensional structure model that correlates the biological activities and the structures of a series of farnesyl protein transferase (FPT) inhibitors exemplified by the compound of 2, 3,4,5-tetrahydro-1-(1H-imidazol-4-ylmethyl)-4-(2-biphenylylcarbonyl)-1H-1, 4-benzodiazepine. METHODS AND RESULTS Thirty-two FPT inhibitors with two types of scaffold were analyzed. Active conformations of which were studied using system search, a 3D-QSAR model were constructed using the method of comparative molecular field analysis (CoMFA). The resulting of cross-validated RCV2 = 0.602, non-cross-validated R2 = 0.958, SE = 0.270 and F = 124.5 indicate that the 3D-model possesses an ability to predict activities of new inhibitors. CONCLUSION The information of CoMFA model offers an approach to designing new FPT inhibitors.
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Affiliation(s)
- S B Wan
- Institute of Materia Medica, Chinese Academy of Medical Scineces, Peking Union Medical College, Beijing 100050, China
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