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Sen K, Khan MI, Paul R, Ghoshal U, Asakawa Y. Recent Advances in the Phytochemistry of Bryophytes: Distribution, Structures and Biological Activity of Bibenzyl and Bisbibenzyl Compounds. PLANTS (BASEL, SWITZERLAND) 2023; 12:4173. [PMID: 38140499 PMCID: PMC10747515 DOI: 10.3390/plants12244173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/21/2023] [Accepted: 11/21/2023] [Indexed: 12/24/2023]
Abstract
Research on bryophyte phytochemistry has revealed the presence of different phytochemicals like fatty acids, terpenoids, small phenolic molecules, etc. Small phenolic molecules, i.e., bibenzyls (of two aromatic rings) and bisbibenzyls (four aromatic rings), are unique signature molecules of liverworts. The first bisbibenzyls marchantin A and riccardin A were discovered in two consecutive years, i.e., 1982 and 1983, respectively, by Asakawa and coworkers. Since then, about 70 bisbibenzyls have been reported. These molecules are characterized and identified using different spectroscopic techniques and surveyed for different bioactivity and structure-activity relations. Biochemistry is determined by the season, geography, and environment. In this review, quantitative and qualitative information on bibenzyls and bisbibenzyl compounds and their distribution in different liverworts across, geographies along withtraditional to advanced extraction methods, and characterization techniques are summarized. Also, a comprehensive account of characteristic spectra of different bisbibenzyl compounds, their subtypes, and their basic skeleton patterns are compared. A comprehensive table is provided here for the first time presenting the quantity of bibenzyls, bisbenzyls, and their derivatives found in bryophytes, mentioning the spectroscopic data and mass profiles of the compounds. The significance of these compounds in different bioactivities like antibiotic, antioxidative, antitumor, antivenomous, anti-influenza, insect antifeedant, cytotoxic, and anticancerous activities are surveyed and critically enumerated.
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Affiliation(s)
- Kakali Sen
- Department of Botany, University of Kalyani, Kalyani 741245, India (U.G.)
| | | | - Raja Paul
- Department of Botany, University of Kalyani, Kalyani 741245, India (U.G.)
| | - Utsha Ghoshal
- Department of Botany, University of Kalyani, Kalyani 741245, India (U.G.)
| | - Yoshinori Asakawa
- Institute of Pharmacognosy, Tokushima Bunri University, Tokushima 770-8514, Japan;
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Ivković I, Novaković M, Veljić M, Mojsin M, Stevanović M, Marin PD, Bukvički D. Bis-Bibenzyls from the Liverwort Pellia endiviifolia and Their Biological Activity. PLANTS 2021; 10:plants10061063. [PMID: 34073157 PMCID: PMC8227020 DOI: 10.3390/plants10061063] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 05/14/2021] [Accepted: 05/18/2021] [Indexed: 12/03/2022]
Abstract
Based on previous investigations where bis-bibenzyls isolated from liverworts showed various biological activities (cytotoxic, antimicrobial, and antiviral), we investigated their cytotoxic activity in several human cancer cell lines. From the methylene-chloride/methanol extract of the liverwort Pellia endiviifolia, three bis-bibenzyls of the perrottetin type were isolated, namely perrottetin E, 10′-hydroxyperrottetin E, and 10,10′-dihydroxyperrottetin E. The last two were found for the first time in this species. Their structures were resolved using 1D and 2D NMR, as well as by comparison with data in the literature. Cytotoxic activity of the isolated compounds was tested on three human leukemia cell lines, HL-60 (acute promyelocytic leukemia cells), U-937 (acute monocytic leukemia cells), and K-562 (human chronic myelogenous leukemia cells), as well as on human embryonal teratocarcinoma cell line (NT2/D1) and human glioblastoma cell lines A-172 and U-251, and compared to the previously isolated bis-bibenzyls (perrottetins) of similar structure. The isolated compounds exhibited modest activity against leukemia cells and significant activity against NT2/D1 and A-172. Overall, the most active cytotoxic compounds in this investigation were perrottetin E (1), isolated in this work from Pellia endiviifolia, and perrottetin F phenanthrene derivative (7), previously isolated from Lunularia cruciata and added for a comparison of their cytotoxic activity.
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Affiliation(s)
- Ivana Ivković
- Institute of Botany and Botanical Garden “Jevremovac”, Faculty of Biology, University of Belgrade, 11000 Begrade, Serbia; (I.I.); (M.V.); (P.D.M.)
| | - Miroslav Novaković
- Department of Chemistry, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, 11000 Belgrade, Serbia;
| | - Milan Veljić
- Institute of Botany and Botanical Garden “Jevremovac”, Faculty of Biology, University of Belgrade, 11000 Begrade, Serbia; (I.I.); (M.V.); (P.D.M.)
| | - Marija Mojsin
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, 11042 Belgrade, Serbia; (M.M.); (M.S.)
| | - Milena Stevanović
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, 11042 Belgrade, Serbia; (M.M.); (M.S.)
- Faculty of Biology, University of Belgrade, 11000 Belgrade, Serbia
- Serbian Academy of Sciences and Arts, 11001 Belgrade, Serbia
| | - Petar D. Marin
- Institute of Botany and Botanical Garden “Jevremovac”, Faculty of Biology, University of Belgrade, 11000 Begrade, Serbia; (I.I.); (M.V.); (P.D.M.)
| | - Danka Bukvički
- Institute of Botany and Botanical Garden “Jevremovac”, Faculty of Biology, University of Belgrade, 11000 Begrade, Serbia; (I.I.); (M.V.); (P.D.M.)
- Correspondence: or ; Tel.: +381-63-161-1980
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Nandy S, Dey A. Bibenzyls and bisbybenzyls of bryophytic origin as promising source of novel therapeutics: pharmacology, synthesis and structure-activity. Daru 2020; 28:701-734. [PMID: 32803687 PMCID: PMC7429097 DOI: 10.1007/s40199-020-00341-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 03/30/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The amphibian, non-vascular, gametophyte-dominant, bio-indicator class, bryophytes; with their wide ranges of habitat have attained importance due to their promising medicinal attributions and therapeutic role; mostly aided by presence of aromatic bibenzyl and bisbybenzyl class of compounds. Bibenzyls are steroidal ethane derivatives, resembling the structural moiety of bioactive dihydro-stilbenoids or iso-quinoline alkaloids. These stress triggered secondary metabolites are the by-products of the flavonoid biosynthetic pathway. Different classes of bryophytes (Bryophyta, Marchantiophyta and Anthocerotophyta) possess different subtypes of bibenzyls and dimeric bisbibenzyls. Among the liverwort, hornwort and mosses, former one is mostly enriched with bibenzyl type constituents as per the extensive study conducted for phytochemical deposit. Considering macrocyclic and acyclic group of bibenzyls and bisbybenzyls, generally marchantin type compounds are reported vividly for significant biological activity that includes neuro-nephro-cardio-protection besides anti-allergic, anti-microbial, anti-apoptotic and cytotoxic activities studied on in-vitro and in-vivo models or on cell lines. RESULT The critical analysis of reported chemical and pharmaceutical attributions of bibenzyls and bis-bibenzyls yielded detailed report on this compound class along with their application, mode of action, natural source, techniques of synthesis, extraction procedure, isolation and characterization. Further, the structure activity relationship studies and bioactivity of bibenzyls derived from non-bryophytic origin were also summarized. CONCLUSION This review encompasses prospective biological application of botanical reservoir of this primarily ignored, primeval land plant group where recent technical advances has paved the way for qualitative and quantitative isolation and estimation of novel compounds as well as marker components to study their impact on environment, as bio-control agents and as key leads in future drug designing. Graphical abstract.
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Affiliation(s)
- Samapika Nandy
- Research Scholar, Department of Life Sciences, Presidency University, Kolkata, 700073 India
| | - Abhijit Dey
- Department of Life Sciences, Presidency University, Kolkata, 700073 India
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Xu K, Gao Y, Li YL, Xie F, Zhao ZT, Lou HX. Cytotoxic p-Terphenyls from the Endolichenic Fungus Floricola striata. JOURNAL OF NATURAL PRODUCTS 2018; 81:2041-2049. [PMID: 30137985 DOI: 10.1021/acs.jnatprod.8b00362] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Eleven new p-terphenyls, floricolins K-U (1-11), together with 13 biosynthetically related known compounds (12-24) were isolated from an endolichenic fungus, Floricola striata. Their structures were elucidated by extensive spectroscopic analyses and single-crystal X-ray diffraction measurements. The newly isolated p-terphenyls inhibited the growth of A2780, MCF-7, and A549 cell lines. Further evaluation for the multidrug resistance (MDR) reversal activity of compound 5 revealed it enhanced the sensitivity of MCF-7/ADR cells toward adriamycin 39-fold at 10 μM through modulating P-glycoprotein-mediated drug exclusion.
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Affiliation(s)
- Ke Xu
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences , Shandong University , No. 44 West Wenhua Road , Jinan 250012 , People's Republic of China
| | - Yun Gao
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences , Shandong University , No. 44 West Wenhua Road , Jinan 250012 , People's Republic of China
| | - Yue-Lan Li
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences , Shandong University , No. 44 West Wenhua Road , Jinan 250012 , People's Republic of China
| | - Fei Xie
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences , Shandong University , No. 44 West Wenhua Road , Jinan 250012 , People's Republic of China
| | - Zun-Tian Zhao
- College of Life Sciences , Shandong Normal University , No. 88 East Wenhua Road , Jinan 250014 , People's Republic of China
| | - Hong-Xiang Lou
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences , Shandong University , No. 44 West Wenhua Road , Jinan 250012 , People's Republic of China
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Sun B, Li L, Hu QW, Zheng HB, Tang H, Niu HM, Yuan HQ, Lou HX. Design, synthesis, biological evaluation and molecular modeling study of novel macrocyclic bisbibenzyl analogues as antitubulin agents. Eur J Med Chem 2017; 129:186-208. [DOI: 10.1016/j.ejmech.2017.02.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 02/07/2017] [Accepted: 02/08/2017] [Indexed: 11/17/2022]
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Wang Y, Cui J, Dai Y, Wu Y, Huang W, Qian H, Ge L. Reversal of P-glycoprotein-mediated multidrug resistance and pharmacokinetics study in rats by WYX-5. Can J Physiol Pharmacol 2016; 95:580-585. [PMID: 28177682 DOI: 10.1139/cjpp-2016-0518] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Multidrug resistance (MDR) is one of the major obstacles confronted in cancer chemotherapy; this obstacle is mainly due to the overexpression of P-glycoprotein (P-gp). Co-administration of anticancer drugs and P-gp inhibitors is a promising approach to overcome MDR. WYX-5, a novel P-gp inhibitor, shows a notable reversal effect with low cytotoxicity in vitro. In this paper, the reversal mechanism and safety of the MDR modulator WYX-5 were explored in vitro, and evaluated for its pharmacokinetics and effects on adriamycin (ADM) metabolism in vivo. The results suggest that WYX-5 is a potent P-gp inhibitor with EC50 in nanomole range (EC50 = 204.3 ± 20.2 nmol·L-1), relative safety (therapeutic index = 446.4), which performs as a substrate of P-gp and retrains its function. Further, WYX-5 (5 mg·kg-1) had relatively ideal pharmacokinetic properties (T1/2 = 6.448 h, F = 96.05%) without interactions with ADM metabolism in vivo. In conclusion, WYX-5 may be a promising candidate for MDR cancer combined-chemotherapy research.
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Affiliation(s)
- Yuzhu Wang
- a Center for Drug Evaluation, CFDA, Beijing, PR China.,b Center of Drug Discovery, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, PR China
| | - Jian Cui
- b Center of Drug Discovery, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, PR China
| | - Yuxuan Dai
- b Center of Drug Discovery, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, PR China
| | - Yuxiang Wu
- b Center of Drug Discovery, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, PR China
| | - Wenlong Huang
- b Center of Drug Discovery, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, PR China.,c Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, Nanjing, PR China
| | - Hai Qian
- b Center of Drug Discovery, State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, PR China.,c Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease, China Pharmaceutical University, Nanjing, PR China
| | - Liang Ge
- d School of Pharmacy, China Pharmaceutical University, Nanjing, PR China
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Wang SQ, Zhang QW, Wang XL, Di XX, Wang XN, Lou HX. Chemical constituents from Cicuta virosa Linnaeus and their reversal effects on doxorubicin-resistant human myelogenous leukemia (K562/A02) cells. CHINESE CHEM LETT 2016. [DOI: 10.1016/j.cclet.2016.03.039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wang H, Jia XH, Chen JR, Wang JY, Li YJ. Osthole shows the potential to overcome P-glycoprotein‑mediated multidrug resistance in human myelogenous leukemia K562/ADM cells by inhibiting the PI3K/Akt signaling pathway. Oncol Rep 2016; 35:3659-68. [PMID: 27109742 DOI: 10.3892/or.2016.4730] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 01/08/2016] [Indexed: 11/06/2022] Open
Abstract
P-glycoprotein (P-gp)-mediated multidrug resistance (MDR) has been reported to play a pivotal role in tumor chemotherapy failure. Study after study has illustrated that the phosphoinositide 3-kinase (PI3K)/Akt signaling cascade is involved in the MDR phenotype and is correlated with P-gp expression in many human malignancies. In the present study, osthole, an O-methylated coumarin, exhibited potent reversal capability of MDR in myelogenous leukemia K562/ADM cells. Simultaneously, the uptake and efflux of Rhodamine-123 (Rh-123) and the accumulation of doxorubicin assays combined with flow cytometric analysis suggested that osthole could increase intracellular drug accumulation. Furthermore, osthole decreased the expression of multidrug resistance gene 1 (MDR1) at both the mRNA and protein levels. Further experiments elucidated that osthole could suppress P-gp expression by inhibiting the PI3K/Akt signaling pathway which might be the main mechanism accounting for the reversal potential of osthole in the MDR in K562/ADM cells. In conclusion, osthole combats MDR and could be a promising candidate for the development of novel MDR reversal modulators.
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Affiliation(s)
- Hong Wang
- Department of Pediatrics, The Affiliated Hospital of Binzhou Medical University, Binzhou, Shandong 256603, P.R. China
| | - Xiu-Hong Jia
- Department of Pediatrics, The Affiliated Hospital of Binzhou Medical University, Binzhou, Shandong 256603, P.R. China
| | - Jie-Ru Chen
- Department of Pediatrics, The Affiliated Hospital of Binzhou Medical University, Binzhou, Shandong 256603, P.R. China
| | - Jian-Yong Wang
- Department of Pediatrics, The Affiliated Hospital of Binzhou Medical University, Binzhou, Shandong 256603, P.R. China
| | - You-Jie Li
- Department of Biochemistry and Molecular Biology, Key Laboratory of Tumour Molecular Biology, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
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10
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Senthilkumar R, Chen BA, Cai XH, Fu R. Anticancer and multidrug-resistance reversing potential of traditional medicinal plants and their bioactive compounds in leukemia cell lines. Chin J Nat Med 2015; 12:881-94. [PMID: 25556059 DOI: 10.1016/s1875-5364(14)60131-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Indexed: 01/11/2023]
Abstract
Multidrug resistance remains a serious clinical problem in the successful therapy of malignant diseases. It occurs in cultured tumor cell lines, as well as in human cancers. Therefore, it is critical to develop novel anticancer drugs with multidrug-resistance modulating potential to increase the survival rate of leukemia patients. Plant-derived natural products have been used for the treatment of various diseases for thousands of years. This review summarizes the anticancer and multidrug-resistance reversing properties of the extracts and bioactive compounds from traditional medicinal plants in different leukemia cell lines. Further mechanistic studies will pave the road to establish the anticancer potential of plant-derived natural compounds.
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Affiliation(s)
- Ravichandran Senthilkumar
- Department of Neoplastic Hematologic Disorders (Medical Science Key Subject of Jiangsu Province), Zhongda Hospital, Schoool of Medicine, Southeast University, Nanjing 210009, China; Department of Oncology, School of Medicine, Southeast University, Nanjing 210009, China
| | - Bao-An Chen
- Department of Neoplastic Hematologic Disorders (Medical Science Key Subject of Jiangsu Province), Zhongda Hospital, Schoool of Medicine, Southeast University, Nanjing 210009, China; Department of Oncology, School of Medicine, Southeast University, Nanjing 210009, China.
| | - Xiao-Hui Cai
- Department of Neoplastic Hematologic Disorders (Medical Science Key Subject of Jiangsu Province), Zhongda Hospital, Schoool of Medicine, Southeast University, Nanjing 210009, China; Department of Oncology, School of Medicine, Southeast University, Nanjing 210009, China
| | - Rong Fu
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, Nanjing 210009, China
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Zhao L, Li W, Zhou Y, Zhang Y, Huang S, Xu X, Li Z, Guo Q. The overexpression and nuclear translocation of Trx-1 during hypoxia confers on HepG2 cells resistance to DDP, and GL-V9 reverses the resistance by suppressing the Trx-1/Ref-1 axis. Free Radic Biol Med 2015; 82:29-41. [PMID: 25656992 DOI: 10.1016/j.freeradbiomed.2015.01.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Revised: 12/27/2014] [Accepted: 01/19/2015] [Indexed: 12/16/2022]
Abstract
Microenvironmental hypoxia gives many tumor cells the capacity for drug resistance. Thioredoxin family members play critical roles in the regulation of cellular redox homeostasis in a stressed environment. In this study, we established a hypoxia-drug resistance (hypoxia-DR) model using HepG2 cells and discovered that the overexpression and nuclear translocation of thioredoxin-1 (Trx-1) are closely associated with this resistance through the regulation of the metabolism by the oxidative stress response to glycolysis. Intranuclear Trx-1 enhances the DNA-binding activity of HIF-1α via its interaction with and reducing action on Ref-1, resulting in increased expression of glycolysis-related proteins (PDHK1, HKII, and LDHA), glucose uptake, and lactate generation under hypoxia. Meanwhile, we found that GL-V9, a newly synthesized flavonoid derivative, shows an ability to reverse the hypoxia-DR and has low toxicity both in vivo and in vitro. GL-V9 could inhibit the expression and nuclear translocation of Trx-1 and then suppress HIF-1α DNA-binding activity by inhibiting the Trx-1/Ref-1 axis. As a result, glycolysis is weakened and oxidative phosphorylation is enhanced. Thus, GL-V9 leads to an increment in intracellular ROS generation and consequently intensified apoptosis induced by DDP.
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Affiliation(s)
- Li Zhao
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, Jiangsu Key Laboratory of Design and Optimization, Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education
| | - Wei Li
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, Jiangsu Key Laboratory of Design and Optimization, Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education
| | - Yuxin Zhou
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, Jiangsu Key Laboratory of Design and Optimization, Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education
| | - Yi Zhang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, Jiangsu Key Laboratory of Design and Optimization, Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education
| | - Shaoliang Huang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, Jiangsu Key Laboratory of Design and Optimization, Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education
| | - Xuefen Xu
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, Jiangsu Key Laboratory of Design and Optimization, Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education
| | - Zhiyu Li
- School of Pharmacy, China Pharmaceutical University, Nanjing 210009, People׳s Republic of China
| | - Qinglong Guo
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, Jiangsu Key Laboratory of Design and Optimization, Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education.
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Xu X, Zhang Y, Li W, Miao H, Zhang H, Zhou Y, Li Z, You Q, Zhao L, Guo Q. Wogonin reverses multi-drug resistance of human myelogenous leukemia K562/A02 cells via downregulation of MRP1 expression by inhibiting Nrf2/ARE signaling pathway. Biochem Pharmacol 2014; 92:220-34. [PMID: 25264278 DOI: 10.1016/j.bcp.2014.09.008] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 09/04/2014] [Accepted: 09/11/2014] [Indexed: 01/11/2023]
Abstract
Constitutive NF-E2-related factor 2 (Nrf2) activation has been recently reported to play a pivotal role in enhancing cell survival and resistance to anticancer drugs in many tumors. Previously, much effort has been devoted to the investigation of blocking Nrf2 function in cultured cells and cancer tissues, but few researches have been undertaken to evaluate the precise mechanism of flavonoids-induced sensitivity by inhibiting Nrf2. In this study, we investigated the reversal effect of Wogonin, a flavonoid isolated from the root of Scutellaria baicalensis Georgi, in resistant human myelogenous leukemia. Data indicated that Wogonin had strong reversal potency by inhibiting functional activity and expression of MRP1 at both protein and mRNA in adriamycin (ADR)-induced resistant human myelogenous leukemia K562/A02 cells. Consequently, the inhibition of MRP1 by Wogonin was dependent on Nrf2 through the decreased binding ability of Nrf2 to antioxidant response element (ARE). Further research revealed Wogonin modulated Nrf2 through the reduction of Nrf2mRNA at transcriptional processes rather than RNA degradation, which is regulated by the PI3K/Akt pathway. Moreover, DNA-PKcs was found to be involved in the Wogonin-induced downregulation of Nrf2 mRNA at transcriptional levels. In summary, these results clearly demonstrated the effectiveness of using Wogonin via inhibiting Nrf2 to combat chemoresistance and suggested that Wogonin can be developed into an efficient natural sensitizer for resistant human myelogenous leukemia.
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Affiliation(s)
- Xuefen Xu
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, People's Republic of China
| | - Yi Zhang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, People's Republic of China
| | - Wei Li
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, People's Republic of China
| | - Hanchi Miao
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, People's Republic of China
| | - Haiwei Zhang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, People's Republic of China
| | - Yuxin Zhou
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, People's Republic of China
| | - Zhiyu Li
- School of Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Qidong You
- School of Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Li Zhao
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, People's Republic of China.
| | - Qinglong Guo
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Carcinogenesis and Intervention, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, People's Republic of China.
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Fu P, Kong F, Li X, Wang Y, Zhu W. Cyanogramide with a new spiro[indolinone-pyrroloimidazole] skeleton from Actinoalloteichus cyanogriseus. Org Lett 2014; 16:3708-11. [PMID: 24968070 DOI: 10.1021/ol501523d] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Cyanogramide (1), an unprecedented alkaloid bearing a novel spirocyclic pyrrolo[1,2-c]imidazole skeleton, was identified from the fermentation broth of the marine-derived Actinoalloteichus cyanogriseus WH1-2216-6. The structure was fully determined by spectroscopic analysis, an exciton chirality CD method, and quantum mechanical calculations. Cyanogramide (1) could efficiently reverse the adriamycin-induced resistance of K562/A02 and MCF-7/Adr cells, and the vincristine-induced resistance of KB/VCR cells at a concentration of 5 μM, with the reversal fold values of 15.5, 41.5, and 9.7, respectively.
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Affiliation(s)
- Peng Fu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China , Qingdao 266003, China
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14
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CXCL12/CXCR4 axis confers adriamycin resistance to human chronic myelogenous leukemia and oroxylin A improves the sensitivity of K562/ADM cells. Biochem Pharmacol 2014; 90:212-25. [PMID: 24858801 DOI: 10.1016/j.bcp.2014.05.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 05/11/2014] [Accepted: 05/13/2014] [Indexed: 12/14/2022]
Abstract
This study was aimed at investigating the reversal effect of oroxylin A, a naturally bioactive monoflavonoid separated and purified from Scutellaria baicalensis Georgi, in human chronic myeloid leukemia (CML) and the underlying mechanisms. The results showed that CXCL12 could enhance the resistance of K562 cells to adriamycin (ADM) by increasing the expression of CXCR4, up-regulating the downstream PI3K/Akt pathway, and promoting translocation of NF-κB dimers into nucleus and subsequently decreasing the expression of apoptosis-related proteins in K562 cells. And we found that ADM resistance was partially reversed by CXCR4 siRNA transfection. Moreover, the sensitivity enhancement of oroxylin A was demonstrated by decreasing the expression of CXCR4 at both protein and mRNA levels, via PI3K/Akt/NF-κB pathway and triggering the apoptosis pathway in vitro. In addition, the in vivo study showed that oroxylin A increased apoptosis of leukemic cells with low systemic toxicity, and the mechanism was the same as in vitro study. In conclusion, all these results showed that oroxylin A improved the sensitivity of K562/ADM cells by increasing apoptosis in leukemic cells and decreasing the expression of CXCR4 and PI3K/Akt/NF-κB pathway, and probably served as a most promising agent for CML treatment.
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Wang H, Zhao L, Zhu LT, Wang Y, Pan D, Yao J, You QD, Guo QL. Wogonin reverses hypoxia resistance of human colon cancer HCT116 cells via downregulation of HIF-1α and glycolysis, by inhibiting PI3K/Akt signaling pathway. Mol Carcinog 2013; 53 Suppl 1:E107-18. [DOI: 10.1002/mc.22052] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 04/08/2013] [Accepted: 05/03/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Hu Wang
- Jiangsu Key Laboratory of Carcinogenesis and Intervention; China Pharmaceutical University; Nanjing China
| | - Li Zhao
- Jiangsu Key Laboratory of Carcinogenesis and Intervention; China Pharmaceutical University; Nanjing China
| | - Li-Tao Zhu
- Jiangsu Key Laboratory of Carcinogenesis and Intervention; China Pharmaceutical University; Nanjing China
| | - Yu Wang
- Jiangsu Key Laboratory of Carcinogenesis and Intervention; China Pharmaceutical University; Nanjing China
| | - Di Pan
- Jiangsu Key Laboratory of Carcinogenesis and Intervention; China Pharmaceutical University; Nanjing China
| | - Jing Yao
- Jiangsu Key Laboratory of Carcinogenesis and Intervention; China Pharmaceutical University; Nanjing China
| | - Qi-Dong You
- Department of Medicinal Chemistry; China Pharmaceutical University; Nanjing China
| | - Qing-Long Guo
- Jiangsu Key Laboratory of Carcinogenesis and Intervention; China Pharmaceutical University; Nanjing China
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Zhu L, Zhao L, Wang H, Wang Y, Pan D, Yao J, Li Z, Wu G, Guo Q. Oroxylin A reverses P-glycoprotein-mediated multidrug resistance of MCF7/ADR cells by G2/M arrest. Toxicol Lett 2013; 219:107-15. [DOI: 10.1016/j.toxlet.2013.01.019] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 01/21/2013] [Accepted: 01/22/2013] [Indexed: 01/27/2023]
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Chen M, Huang SL, Zhang XQ, Zhang B, Zhu H, Yang VW, Zou XP. Reversal effects of pantoprazole on multidrug resistance in human gastric adenocarcinoma cells by down-regulating the V-ATPases/mTOR/HIF-1α/P-gp and MRP1 signaling pathway in vitro and in vivo. J Cell Biochem 2012; 113:2474-87. [PMID: 22396185 PMCID: PMC3762681 DOI: 10.1002/jcb.24122] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
To investigate reversal effects of pantoprazole (PPZ) on multidrug resistance (MDR) in human gastric adenocarcinoma cells in vivo and in vitro. Human gastric adenocarcinoma cell SGC7901 was cultured in RPMI-1640 medium supplemented with 10% fetal bovine serum and antibiotics in a humidified 5% CO(2) atmosphere at 37°C. Adriamycin (ADR)-resistant cells were cultured with addition of 0.8 µg/ml of ADR maintaining MDR phenotype. ADR was used to calculate ADR releasing index; CCK-8 Assay was performed to evaluate the cytotoxicity of anti-tumor drugs; BCECF-AM pH-sensitive fluorescent probe was used to measure intracellular pH (pHi) value of cells, whereas pH value of medium was considered as extracellular pH (pHe) value; Western blotting and immunofluorescent staining analyses were employed to determine protein expressions and intracellular distributions of vacuolar H(+) -ATPases (V-ATPases), mTOR, HIF-1α, P-glycoprotein (P-gp), and multidrug resistant protein 1 (MRP1); SGC7901 and SGC7901/ADR cells were inoculated in athymic nude mice. Thereafter, effects of ADR with or without PPZ pretreatment were compared by determining the tumor size and weight, apoptotic cells in tumor tissues were detected by TUNEL assay. At concentrations greater than 20 µg/ml, PPZ pretreatment reduced ADR releasing index and significantly enhanced intracellular ADR concentration of SGC7901 (P < 0.01). Similarly, PPZ pretreatment significantly decreased ADR releasing index of SGC7901/ADR dose-dependently (P < 0.01). PPZ pretreatment also decreased cell viabilities of SGG7901 and SGC7901/ADR dose-dependently. After 24-h PPZ pretreatment, administration of chemotherapeutic agents demonstrated maximal cytotoxic effects on SGC7901 and SGC7901/ADR cells (P < 0.05). The resistance index in PPZ pretreatment group was significantly lower than that in non-PPZ pretreatment group (3.71 vs. 14.80). PPZ at concentration >10 µg/ml significantly decreased pHi in SGC7901 and SGC7901/ADR cells and diminished or reversed transmembrane pH gradient (P < 0.05). PPZ pretreatment also significantly inhibited protein expressions of V-ATPases, mTOR, HIF-1α, P-gp, and MRP1, and alter intracellular expressions in parent and ADR-resistant cells (P < 0.05). In vivo experiments further confirmed that PPZ pretreatment could enhance anti-tumor effects of ADR on xenografted tumor of nude mice and also improve the apoptotic index in xenografted tumor tissues. PPZ pretreatment enhances the cytotoxic effects of anti-tumor drugs on SGC7901 and reverse MDR of SGC7901/ADR by downregulating the V-ATPases/mTOR/HIF-1α/P-gp and MRP1 signaling pathway.
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Affiliation(s)
- Min Chen
- Department of Gastroenterology, the Affiliated Drum Tower Hospital of Nanjing University, Medical School, Nanjing 210008, P.R. China
| | - Shu-Ling Huang
- Department of Gastroenterology, the Affiliated Drum Tower Hospital of Nanjing University, Medical School, Nanjing 210008, P.R. China
| | - Xiao-Qi Zhang
- Department of Gastroenterology, the Affiliated Drum Tower Hospital of Nanjing University, Medical School, Nanjing 210008, P.R. China
| | - Bin Zhang
- Department of Gastroenterology, the Affiliated Drum Tower Hospital of Nanjing University, Medical School, Nanjing 210008, P.R. China
| | - Hao Zhu
- Department of Gastroenterology, the Affiliated Drum Tower Hospital of Nanjing University, Medical School, Nanjing 210008, P.R. China
| | - Vincent W. Yang
- Division of Digestive Diseases, Emory University School of Medicine, Atlanta, Georgia
| | - Xiao-Ping Zou
- Department of Gastroenterology, the Affiliated Drum Tower Hospital of Nanjing University, Medical School, Nanjing 210008, P.R. China
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Huang C, Xu D, Xia Q, Wang P, Rong C, Su Y. Reversal of P-glycoprotein-mediated multidrug resistance of human hepatic cancer cells by Astragaloside II. ACTA ACUST UNITED AC 2012; 64:1741-50. [PMID: 23146037 DOI: 10.1111/j.2042-7158.2012.01549.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVES Chemoresistance is the main obstacle encountered in cancer treatment and is frequently associated with multidrug resistance (MDR). Astragaloside is a saponin which is widely used in traditional Chinese medicine. It has been reported that Astragaloside has antitumour effects on hepatocellular carcinoma Bel-7402 cells in vitro and in vivo. The purpose of this study was to examine the effects of Astragaloside II on the reversal of MDR and its molecular mechanism in vitro. METHODS In this study, Bel-7402 and Bel-7402/FU cell lines were used as the experimental model. Drug sensitivity was determined using the 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay, accumulation and efflux of Rh123 were analyzed by flow cytometer, the mRNA level of mdr1 was determined by RT-PCR and the protein levels of P-glycoprotein (P-gp) and mitogen-activated protein kinase were determined by Western blot. KEY FINDINGS Astragaloside II (0.08 mg/ml) showed strong potency to increase 5-fluorouracil cytotoxicity toward 5-fluorouracil-resistant human hepatic cancer cells Bel-7402/FU. The mechanism of Astragaloside II on P-gp-mediated MDR demonstrated that Astragaloside II significantly increased the intracellular accumulation of rhodamine 123 via inhibition of P-gp transport function. Based on the analysis of P-gp and mdr1 gene expression using Western blot and RT-PCR, the results revealed that Astragaloside II could downregulate the expression of the P-gp and mdr1 gene. In addition, Astragaloside II suppressed phosphorylation of extracellular signal regulated kinase 1/2, p38 and c-Jun N-terminal kinase. CONCLUSIONS The results suggested that Astragaloside II is a potent MDR reversal agent and may be a potential adjunctive agent for hepatic cancer chemotherapy.
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Affiliation(s)
- Can Huang
- School of Pharmacy, Anhui Medical University, The First Affiliated Hospital of Anhui Medical University, China
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Zhong Y, Zhang F, Sun Z, Zhou W, Li Z, You Q, Guo Q, Hu R. Drug resistance associates with activation of Nrf2 in
MCF
‐7/
DOX
cells, and wogonin reverses it by down‐regulating Nrf2‐mediated cellular defense response. Mol Carcinog 2012; 52:824-34. [DOI: 10.1002/mc.21921] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Accepted: 04/10/2012] [Indexed: 12/14/2022]
Affiliation(s)
- Yan Zhong
- State Key Laboratory of Natural MedicinesChina Pharmaceutical UniversityJiangsuChina
| | - Fengyi Zhang
- State Key Laboratory of Natural MedicinesChina Pharmaceutical UniversityJiangsuChina
| | - Zhongying Sun
- State Key Laboratory of Natural MedicinesChina Pharmaceutical UniversityJiangsuChina
| | - Wei Zhou
- State Key Laboratory of Natural MedicinesChina Pharmaceutical UniversityJiangsuChina
| | - Zhi‐Yu Li
- Department of Medicinal ChemistryChina Pharmaceutical UniversityJiangsuChina
| | - Qi‐Dong You
- Department of Medicinal ChemistryChina Pharmaceutical UniversityJiangsuChina
| | - Qing‐Long Guo
- State Key Laboratory of Natural MedicinesChina Pharmaceutical UniversityJiangsuChina
| | - Rong Hu
- State Key Laboratory of Natural MedicinesChina Pharmaceutical UniversityJiangsuChina
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Bedos-Belval F, Rouch A, Vanucci-Bacqué C, Baltas M. Diaryl ether derivatives as anticancer agents – a review. MEDCHEMCOMM 2012. [DOI: 10.1039/c2md20199b] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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21
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Fu P, Liu P, Li X, Wang Y, Wang S, Hong K, Zhu W. Cyclic Bipyridine Glycosides from the Marine-Derived Actinomycete Actinoalloteichus cyanogriseus WH1-2216-6. Org Lett 2011; 13:5948-51. [DOI: 10.1021/ol202245s] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peng Fu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China, Marine College, Shandong University at Weihai, Weihai 264209, P. R. China, and College of Pharmacy, Wuhan University, Wuhan 430071, P. R. China
| | - Peipei Liu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China, Marine College, Shandong University at Weihai, Weihai 264209, P. R. China, and College of Pharmacy, Wuhan University, Wuhan 430071, P. R. China
| | - Xia Li
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China, Marine College, Shandong University at Weihai, Weihai 264209, P. R. China, and College of Pharmacy, Wuhan University, Wuhan 430071, P. R. China
| | - Yi Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China, Marine College, Shandong University at Weihai, Weihai 264209, P. R. China, and College of Pharmacy, Wuhan University, Wuhan 430071, P. R. China
| | - Shuxia Wang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China, Marine College, Shandong University at Weihai, Weihai 264209, P. R. China, and College of Pharmacy, Wuhan University, Wuhan 430071, P. R. China
| | - Kui Hong
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China, Marine College, Shandong University at Weihai, Weihai 264209, P. R. China, and College of Pharmacy, Wuhan University, Wuhan 430071, P. R. China
| | - Weiming Zhu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China, Marine College, Shandong University at Weihai, Weihai 264209, P. R. China, and College of Pharmacy, Wuhan University, Wuhan 430071, P. R. China
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Sun CC, Zhang YS, Xue X, Cheng YN, Liu HP, Zhao CR, Lou HX, Qu XJ. Inhibition of angiogenesis involves in anticancer activity of riccardin D, a macrocyclic bisbibenzyl, in human lung carcinoma. Eur J Pharmacol 2011; 667:136-43. [DOI: 10.1016/j.ejphar.2011.06.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Revised: 05/11/2011] [Accepted: 06/06/2011] [Indexed: 01/07/2023]
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23
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Yang HY, Zhao L, Yang Z, Zhao Q, Qiang L, Ha J, Li ZY, You QD, Guo QL. Oroxylin a reverses multi-drug resistance of human hepatoma BEL7402/5-FU cells via downregulation of P-glycoprotein expression by inhibiting NF-κB signaling pathway. Mol Carcinog 2011; 51:185-95. [DOI: 10.1002/mc.20789] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Revised: 03/31/2011] [Accepted: 04/05/2011] [Indexed: 12/18/2022]
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Reversal effects of two new milbemycin compounds on multidrug resistance in MCF-7/adr cells in vitro. Eur J Pharmacol 2011; 659:108-13. [PMID: 21458446 DOI: 10.1016/j.ejphar.2011.03.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2010] [Revised: 01/26/2011] [Accepted: 03/15/2011] [Indexed: 12/16/2022]
Abstract
Development of agents to overcome multidrug resistance (MDR) is important in cancer chemotherapy, and the overexpression of P-glycoprotein (P-gp) is one of the major mechanisms of MDR. In this paper, we evaluated the effects of two new milbemycin compounds, milbemycin β(14) and secomilbemycin D, isolated from fermentation broth of S. bingchenggensis on reversing MDR of adriamycin-resistant human breast carcinoma (MCF-7/adr) cells. We observed that the both milbemycins (5 μM) showed strong potency to increase adriamycin cytotoxicity toward MCF-7/adr cells with reversal fold (RF) of 13.5 and 10.59, respectively. In addition, the mechanisms of milbemycins on reversing P-gp-mediated MDR demonstrated that they significantly increased the accumulations of adriamycin and Rh123 via inhibiting P-gp efflux in MCF-7/adr cells. Furthermore, the results also revealed that milbemycin β(14) and secomilbemycin D could regulate down the expression of P-gp, but not affect the expression of MDR1 gene. In conclusion, our observations suggest that the two new milbemycin compounds probably represent the promising agents for reversing MDR in cancer therapy.
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Li X, Zhao Y, Wu WK, Liu S, Cui M, Lou H. Solamargine induces apoptosis associated with p53 transcription-dependent and transcription-independent pathways in human osteosarcoma U2OS cells. Life Sci 2011; 88:314-21. [DOI: 10.1016/j.lfs.2010.12.006] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Revised: 11/03/2010] [Accepted: 12/01/2010] [Indexed: 11/15/2022]
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26
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Li X, Wu WKK, Sun B, Cui M, Liu S, Gao J, Lou H. Dihydroptychantol A, a macrocyclic bisbibenzyl derivative, induces autophagy and following apoptosis associated with p53 pathway in human osteosarcoma U2OS cells. Toxicol Appl Pharmacol 2010; 251:146-54. [PMID: 21185854 DOI: 10.1016/j.taap.2010.12.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Revised: 12/10/2010] [Accepted: 12/12/2010] [Indexed: 01/07/2023]
Abstract
Dihydroptychantol A (DHA), a novel macrocyclic bisbibenzyl compound extracted from liverwort Asterella angusta, has antifungal and multi-drug resistance reversal properties. Here, the chemically synthesized DHA was employed to test its anti-cancer activities in human osteosarcoma U2OS cells. Our results demonstrated that DHA induced autophagy followed by apoptotic cell death accompanied with G₂/M-phase cell cycle arrest in U2OS cells. DHA-induced autophagy was morphologically characterized by the formation of double membrane-bound autophagic vacuoles recognizable at the ultrastructural level. DHA also increased the levels of LC3-II, a marker of autophagy. Surprisingly, DHA-mediated apoptotic cell death was potentiated by the autophagy inhibitor 3-methyladenine, suggesting that autophagy may play a protective role that impedes the eventual cell death. Furthermore, p53 was shown to be involved in DHA-mediated autophagy and apoptosis. In this connection, DHA increased nuclear expression of p53, induced p53 phosphorylation, and upregulated p53 target gene p21(Waf1/Cip1). In contrast, cytoplasmic p53 was reduced by DHA, which contributed to the stimulation of autophagy. In relation to the cell cycle, DHA decreased the expression of cyclin B₁, a cyclin required for progression through the G₂/M phase. Taken together, DHA induces G₂/M-phase cell cycle arrest and apoptosis in U2OS cells. DHA-induced apoptosis was preceded by the induction of protective autophagy. DHA-mediated autophagy and apoptosis are associated with the cytoplasmic and nuclear functions of p53.
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Affiliation(s)
- Xia Li
- School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
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Xue X, Qu XJ, Gao ZH, Sun CC, Liu HP, Zhao CR, Cheng YN, Lou HX. Riccardin D, a novel macrocyclic bisbibenzyl, induces apoptosis of human leukemia cells by targeting DNA topoisomerase II. Invest New Drugs 2010; 30:212-22. [PMID: 20924640 DOI: 10.1007/s10637-010-9554-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2010] [Accepted: 09/28/2010] [Indexed: 10/19/2022]
Abstract
We studied the effect of riccardin D, a macrocyclic bisbibenzyl, which was isolated from the Chinese liverwort plant, on human leukemia cells and the underlying molecular mechanism. Riccardin D had a significant antiproliferative effect on human leukemia cell lines HL-60, K562 and its multidrug resistant (MDR) counterpart K562/A02 cells, but showed no effect on the topoisomerase-II-deficient HL-60/MX2 cells, as measured by the 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) assay. The pBR322 DNA relaxation assay revealed that riccardin D selectively inhibited the activity of topoisomerase II (topo II). The suppression of topo II activity by riccardin D was stronger than that of etoposide, a known topo II inhibitor. After treatment with riccardin D, nuclear extracts of leukemia K562 and K562/A02 cells left the majority of pBR322 DNA in a supercoiled form. Further examination showed that riccardin D effectively induced HL-60, K562 and K562/A02 apoptosis as evidenced by externalization of phosphatidylserine and formation of DNA ladder fragments. The activation of cytochrome c, caspase-9, caspase-3 and cleaved poly ADP-ribose polymerase (PARP) was also enhanced, as estimated by Western blot analysis. By contrast, riccardin D was unable to induce apoptosis in the topoisomerase-II-deficient HL-60/MX2 cells, indicating that the induction of apoptosis by riccardin D was due to the inhibition of topo II activity. In addition, riccardin D was able to significantly decrease P-glycoprotein (P-gp) expression in K562/A02 cells. Taken together, our data demonstrate that riccardin D is a novel DNA topo II inhibitor which can induce apoptosis of human leukemia cells and that it has therapeutic potential for both regular and MDR strains of leukemia cells.
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Affiliation(s)
- Xia Xue
- Department of Pharmacology, School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong 250012, China
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Sun LR, Zhong JL, Cui SX, Li X, Ward SG, Shi YQ, Zhang XF, Cheng YN, Gao JJ, Qu XJ. Modulation of P-glycoprotein activity by the substituted quinoxalinone compound QA3 in adriamycin-resistant K562/A02 cells. Pharmacol Rep 2010; 62:333-42. [PMID: 20508289 DOI: 10.1016/s1734-1140(10)70273-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2009] [Revised: 10/21/2009] [Indexed: 10/25/2022]
Abstract
QA3 is a derivative of the substituted 1,3-dimethyl-1H-quinoxalin-2-ones, which are compounds that may selectively antagonize P-glycoprotein (P-gp) in multidrug resistance (MDR) cancer cells. Our previous work identified QA3 as a candidate compound for reversing MDR in cancer cells. In the present study, we found that QA3 significantly decreases the intracellular level of ATP, stimulates ATPase activity in membrane microsomes and decreases protein kinase C (PKC) activity. These results indicated that QA3 inhibits P-gp activity by blocking ATP hydrolysis and ATP regeneration. Furthermore, QA3 triggered and increased adriamycin-induced K562/A02 cell apoptosis as evidenced by Annexin V-FITC plus PI staining.Western blot analysis showed that the levels of cleaved caspase-9 and cleaved caspase-3 proteins increased, and similarly, the levels of procaspase-9 and procaspase-3 decreased after QA3 treatment. Consequently, poly ADP-ribose polymerase (PARP) activity increased as evidenced by the presence of the PARP cleavage product in K562/A02 cells. QA3 also enhanced the potency of adriamycin against K562/A02 cells as demonstrated by increased apoptosis and activation of caspase-9,-3 and PARP. These data support the observation that P-gp activity is inhibited after QA3 treatment. Moreover, these results indicate that QA3 is a novel MDR reversal agent with potent inhibitory action against P-gp MDR cancer cells.
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Affiliation(s)
- Li-Rui Sun
- Department of Pharmacology, School of Pharmaceutical Sciences, Shandong University, Jinan, China
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Zhang L, Ma S. Efflux pump inhibitors: a strategy to combat P-glycoprotein and the NorA multidrug resistance pump. ChemMedChem 2010; 5:811-22. [PMID: 20373322 DOI: 10.1002/cmdc.201000006] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Multidrug resistance (MDR) is the cause of an ever-increasing number of problems in the treatment of cancers and bacterial infections. The active efflux of drugs contributes significantly to this phenomenon. This minireview summarizes recent advances in combating MDR, with particular emphasis on natural and synthetic efflux pump inhibitors of P-glycoprotein in resistant tumor cells and of the NorA MDR pump in Staphylococcus aureus.
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Affiliation(s)
- Ling Zhang
- Department of Medicinal Chemistry, School of Pharmaceutical Sciences, Shandong University, 44 West Culture Road, Jinan 250012, PR China
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Xiang W, Gao A, Liang H, Li C, Gao J, Wang Q, Shuang B, Zhang J, Yan Y, Wang X. Reversal of P-glycoprotein-mediated multidrug resistance in vitro by milbemycin compounds in adriamycin-resistant human breast carcinoma (MCF-7/adr) cells. Toxicol In Vitro 2010; 24:1474-81. [PMID: 20656007 DOI: 10.1016/j.tiv.2010.07.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Revised: 07/07/2010] [Accepted: 07/19/2010] [Indexed: 12/25/2022]
Abstract
The effects of milbemycin A(4) (MB A(4)), milbemycin oxime A(4) (MBO A(4)) and milbemycin beta(1) (MB beta(1)) on reversing multidrug resistance (MDR) of tumor cells were firstly conducted according to the following research, including MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide] assay, the accumulation of adriamycin, the accumulation and efflux of rhodamine 123 (Rh123), the regulations of MDR1 gene, and expression of P-gp. The three milbemycins (5muM) showed strong potency to increase adriamycin cytotoxicity toward adriamycin-resistant human breast carcinoma cells MCF-7/adr with reversal fold (RF) of 21.42, 19.06 and 14.89, respectively. In addition, the mechanisms of milbemycins on P-glycoprotein (P-gp)-mediated MDR demonstrated that the milbemycins significantly increased the intracellular accumulations of adriamycin and Rh123 via inhibiting P-gp transport function. Based on the analysis of the P-gp and MDR1 gene expression using flow cytometry and RT-PCR, the results revealed that milbemycin compounds, particularly MB A(4), could regulate down the expression of the P-gp and MDR1 gene. These findings suggest that the milbemycins probably represent promising agents for overcoming MDR in cancer therapy, and especially MB A(4) is better modulator with the lowest toxicity.
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Affiliation(s)
- Wensheng Xiang
- School of Life Science, Northeast Agricultural University, Xiangfang District, Harbin, China
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Sun B, Yuan HQ, Xi GM, Ma YD, Lou HX. Synthesis and multidrug resistance reversal activity of dihydroptychantol A and its novel derivatives. Bioorg Med Chem 2009; 17:4981-9. [DOI: 10.1016/j.bmc.2009.05.077] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2009] [Revised: 05/28/2009] [Accepted: 05/29/2009] [Indexed: 10/20/2022]
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Wang SQ, Ren DM, Xiang F, Wang XN, Zhu CJ, Yuan HQ, Sun LM, Lv BB, Sun XJ, Lou HX. Dracotanosides A-D, spermidine glycosides from Dracocephalum tanguticum: structure and amide rotational barrier. JOURNAL OF NATURAL PRODUCTS 2009; 72:1006-1010. [PMID: 19499937 DOI: 10.1021/np900140s] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Four new spermidine glycosides, dracotanosides A-D (1-4), have been isolated from Dracocephalum tanguticum. These molecules represent the first spermidine glycosides from this plant genus. The structures, including absolute configurations, were determined by spectroscopic and chemical methods. The amide bond rotational barrier of aglycone 1a was calculated by density functional theory (DFT) computation.
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Affiliation(s)
- Shu-Qi Wang
- Department of Natural Products Chemistry, School of Pharmaceutical Sciences, Shandong University, Jinan, People's Republic of China
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