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Bidesmosidic betulin saponin bearing L-rhamnopyranoside moieties induces apoptosis and inhibition of lung cancer cells growth in vitro and in vivo. PLoS One 2018. [PMID: 29538422 PMCID: PMC5851596 DOI: 10.1371/journal.pone.0193386] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Betulin has a wide range of biological and pharmacological properties with its anticancer activity attracting most of the attention as it offers a possible alternative treatment to chemotherapy. However, betulin’s in vivo biological effectiveness is limited by its poor solubility. As such, we synthesized polar glycosylated derivatives to increase its hydrosolubility and enhance its pharmacological properties. Among these synthesized compounds, 28-O-α-l-rhamnopyranosylbetulin 3β-O-α-l-rhamnopyranoside (Bi-L-RhamBet) was assessed for its cytotoxic effects against a suite of lung cancer cell lines. We also investigated its mechanism of action using an A549 lung cancer cell line. Our results showed that Bi-L-RhamBet exhibited potent cytotoxic activity toward lung cancer cell lines including A549, NCI-H2087, NCI-H522, NCI-H1993 NCI-H1755, and LLC1 having IC50 values ranging from 2.9 to 5.9 μM. Moreover, Bi-L-RhamBet (50 mg/kg) significantly inhibited tumor growth with a treatment-to-control ratio (T/C) of 0.54 and a tumor growth inhibition rate of 46% at day 18 (p < 0.05). Microscopic observations of A549 cells, double stained with acridine orange and ethidium bromide, showed apoptotic features. Bi-L-RhamBet induced activation of pro-apoptotic caspases 8, 9, and 3/7 as well as causing DNA fragmentation. Moreover, a marked increase in mitochondrial ROS (mROS) was coupled with a reduction of mitochondrial potential. Interestingly, the presence of mitochondrial electron transport chain (ETC) inhibitors, including rotenone, malonate, and antimycin A, reduced mROS production, and the activation of caspases suggesting that Bi-L-RhamBet disturbs the ETC. Finally, dichloroacetate, a pyruvate dehydrogenase kinase inhibitor potentiated the cytotoxicity of Bi-L-RhamBet against A549 cells. Taken together, these data suggest that Bi-L-RhamBet can induce apoptotic cell death via disturbance of mitochondrial electron transfer chain, reduced ROS production, and decreased membrane potential.
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Wang WP, Gao HY. Combination therapy of hTERTR and FAM96A for hepatocellular carcinoma through enhancing apoptosis sensitivity. Exp Ther Med 2017; 15:641-648. [PMID: 29399066 PMCID: PMC5772592 DOI: 10.3892/etm.2017.5505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2016] [Accepted: 04/07/2017] [Indexed: 11/16/2022] Open
Abstract
Avoidance of apoptosis induced by anticancer drugs is an essential factor of carcinogenesis and a hallmark of resistance to cancer therapy. Human telomerase reverse transcriptase receptor (hTERTR) is a potential anti-cancer agent for inhibiting tumor growth. Family with sequence similarity 96 member A (FAM96A) is a ubiquitous, conserved protein and possesses apoptosome-activating and pro-apoptotic tumor suppressor potential in hepatocellular carcinoma (HCC). In the present study, hTERTR and FAM96A were identified as efficient anti-cancer agents for activating apoptosomes and reducing tumor growth. The potential tumor suppressor function of combination treatment with hTERTR and FAM96A in HCC was also investigated. hTERTR and FAM96A proteins were expressed by genetic engineering and their anti-cancer function was explored in vitro and in vivo. Effects of hTERTR and FAM96A on improvement of apoptotic sensitivity and inhibition of migration and invasion were examined in cancer cells and in a mouse model. The present results demonstrated that the therapeutic effects of hTERTR and FAM96A were effective for inhibiting tumor growth and inducing apoptosis of HCC cells in H22-bearing nude mice compared with single agent treatment. hTERTR and FAM96A were found to bind with apoptotic protease activating factor 1 and human telomerase reverse transcriptase, which enhanced the apoptosis of tumor cells and apoptosis sensitivity. In addition, hTERTR and FAM96A therapy enhanced cytotoxic effects by cytotoxic T lymphocyte responses, interferon-γ release, T lymphocytes infiltration and apoptosis on tumor cells. Furthermore, hTERTR and FAM96A protein inhibited tumor growth in HCC mice. In conclusion, the present findings suggested that combination therapy with hTERTR and FAM96A may serve as novel tumor suppressor agents.
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Affiliation(s)
- Wan-Peng Wang
- Department of Infectious Diseases, Weifang City People's Hospital, Weifang, Shandong 261041, P.R. China
| | - Hai-Ying Gao
- Department of Infectious Diseases, Weifang City People's Hospital, Weifang, Shandong 261041, P.R. China
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Cai C, Tang J, Shen B, Ding L, Shao Y, Chen Z, Ma Y, Xue H, Wei Z. Preclinical trial of the multi-targeted lenvatinib in combination with cellular immunotherapy for treatment of renal cell carcinoma. Exp Ther Med 2017; 14:3221-3228. [PMID: 28912872 DOI: 10.3892/etm.2017.4858] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 02/07/2017] [Indexed: 12/18/2022] Open
Abstract
Lenvatinib is an oral, multi-targeted tyrosine kinase inhibitor of vascular endothelial growth factor receptors 1-3, fibroblast growth factor receptors 1-4, platelet-derived growth factor receptor β, RET and KIT. Cellular immunotherapy has the potential to be a highly targeted treatment, with low toxicity to normal tissues and a high capacity to eradicate tumor tissue. The present study assessed the safety, maximum tolerated dose (MTD) and preliminary antitumor activity of lenvatinib and cellular immunotherapy in a murine model of renal cell carcinoma (RCC). The present study used a therapeutic dose of 0.12 mg lenvatinib and/or 104 rat uterine cancer adenocarcinoma (RuCa)-sensitized lymphocytes administered once daily continuously in 7-day cycles. Tumor regression was observed in mice with RCC following treatment with lenvatinib and 104 RuCa-sensitized lymphocytes. MTD was established as once daily administration of 0.18 mg lenvatinib and 106 RuCa-sensitized lymphocytes. The most common treatment-related adverse effects observed were fatigue (40%), mucosal inflammation (30%), proteinuria, diarrhea, vomiting, hypertension and nausea (all 40%). Combination therapy using lenvatinib and cellular immunotherapy enhanced the antitumor effect induced by single treatments and prolonged the survival of mice with RCC compared with either of the single treatments. Treatment with lenvatinib (0.12 mg) combined with 104 RuCa-sensitized lymphocytes was associated with manageable toxicity consistent with individual agents. Further evaluation of this combination therapy in mice with advanced RCC is required. In conclusion, cellular immunotherapy and oncolytic therapy for cancer may be improved by the synergistic effects of lenvatinib and sensitized lymphocytes. In the present study, the inherent antineoplastic and immune stimulatory properties of the two agents were enhanced when used in combination, which may provide a basis for clinical treatment of patients with RCC.
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Affiliation(s)
- Chengkuan Cai
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210011, P.R. China
| | - Jingyuan Tang
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Baixin Shen
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210011, P.R. China
| | - Liucheng Ding
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210011, P.R. China
| | - Yunpeng Shao
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210011, P.R. China
| | - Zhengsen Chen
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210011, P.R. China
| | - Yinchao Ma
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210011, P.R. China
| | - Haoliang Xue
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210011, P.R. China
| | - Zhongqing Wei
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210011, P.R. China
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Zhang MY, Wang JP. A multi-target protein of hTERTR-FAM96A presents significant anticancer potent in the treatment of hepatocellular carcinoma. Tumour Biol 2017; 39:1010428317698341. [PMID: 28443470 DOI: 10.1177/1010428317698341] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
The abilities to escape apoptosis induced by anticancer drugs are an essential factor of carcinogenesis and a hallmark of resistance to cancer therapy. In this study, we identified hTERTR-FAM96A (human telomerase reverse transcriptase–family with sequence similarity 96 member A) as a new efficient agent for apoptosome-activating and anti-tumor protein and investigated the potential tumor suppressor function in hepatocellular carcinoma. The hTERTR-FAM96A fusion protein was constructed by genetic engineering and its anticancer function of hTERTR-FAM96A was explored in vitro and in vivo by investigating the possible preclinical outcomes. Effects of hTERTR-FAM96A on improvement of apoptotic sensitivity and inhibition of migration and invasion were examined in cancer cells and tumors. Our results showed that the therapeutic effects of hTERTR-FAM96A were highly effective for inhibiting tumor growth and inducing apoptosis of hepatocellular carcinoma cells in H22-bearing nude mice. The hTERTR-FAM96A fusion protein could specifically bind with Apaf-1 and hTERT, which further induced apoptosis of hepatocellular carcinoma cells and improved apoptosis sensitivity. Our results indicated that hTERTR-FAM96A treatment enhanced cytotoxic effects by upregulation of cytotoxic T lymphocyte responses, interferon-γ release, and T lymphocyte infiltration. In addition, hTERTR-FAM96A led to tumor-specific immunologic cytotoxicity through increasing apoptotic body on hepatocellular tumors. Furthermore, hTERTR-FAM96A dramatically inhibited tumor growth, reduced death rate, and prolonged mice survival in hepatocellular carcinoma mice derived from three independent hepatocellular carcinoma mice cohorts compared to control groups. In summary, our data suggest that hTERTR-FAM96A may serve as an efficient anti-tumor agent for the treatment of hepatocellular carcinoma.
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Affiliation(s)
- Meng-Yu Zhang
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Jie-Ping Wang
- Department of Rehabilitation, The Affiliated Hospital of Southwest Medical University, Luzhou, China
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Timocin T, Husunet MT, Valipour E, Norizadeh Tazehkand M, Celik R, Topaktas M, Ila HB. In vitro cytogenetic evaluation of the particular combination of flurbiprofen and roxithromycin. Drug Chem Toxicol 2016; 40:326-332. [PMID: 27600436 DOI: 10.1080/01480545.2016.1223097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Flurbiprofen (FLB) (anti-inflammatory and analgesic drug) and roxithromycin (RXM) (antibiotic) were widely used in world wide. This study deals with investigation of genotoxicity, cytotoxicity, and oxidative stress effects of a particular combination of these drugs in human cultured lymphocytes. Also, DNA damaging-protective effects of combination of these drugs were analyzed on plasmid DNA. Human lymphocytes were treated with different concentrations (FLB + RXM; 10 μg/mL + 25 μg/mL, 15 μg/mL + 50 μg/mL, and 20 μg/mL + 100 μg/mL) of the drugs following by study of their genotoxic and cytotoxic effects by analysis of cytokinesis-block micronucleus test and nuclear division index, respectively. The effect of the combination in aspect of anti-oxidative and DNA damaging activity was evaluated on Pet-22b plasmid. According to our results, the combination of FLB and RXM did not show a notable genotoxic effect on cells. Although each of the substances had been shown as a cytotoxic agent by previous researchers, in this research, the combination of these drugs did not exhibit any adverse effect on cell division. FLB had DNA protection effect against H2O2 while in combination with RXM had not the same effect on the plasmid.
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Affiliation(s)
- Taygun Timocin
- a Department of Biology , Institute of Science, Cukurova University , Adana , Turkey
| | - Mehmet Tahir Husunet
- a Department of Biology , Institute of Science, Cukurova University , Adana , Turkey
| | - Ebrahim Valipour
- b Department of Molecular Biology and Genetics , Faculty of Sciences and Arts, Bülent Ecevit University , Turkey
| | | | - Rima Celik
- a Department of Biology , Institute of Science, Cukurova University , Adana , Turkey
| | - Mehmet Topaktas
- d Department of Biology , Faculty of Science and Letters, Cukurova University , Adana , Turkey
| | - Hasan B Ila
- d Department of Biology , Faculty of Science and Letters, Cukurova University , Adana , Turkey
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Haque L, Pradhan AB, Bhuiya S, Das S. Exploring the comparative binding aspects of benzophenanthridine plant alkaloid chelerythrine with RNA triple and double helices: a spectroscopic and calorimetric approach. Phys Chem Chem Phys 2016; 17:17202-13. [PMID: 26073991 DOI: 10.1039/c5cp01737h] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A comparative study on the interaction of a benzophenanthridine alkaloid chelerythrine (CHL) with RNA triplex poly(U).poly(A)*poly(U) (hereafter U.A*U, .(dot) and *(asterisk) represent Watson-Crick and Hoogsteen base pairing respectively) and its parent duplex poly(A).poly(U) (A.U) was carried out by using a combination of various spectroscopic, viscometric and calorimetric techniques. The interaction was characterized by hypochromic and bathochromic effects in the absorption spectrum, the increase of thermal melting temperature, enhancement in solution viscosity, and perturbation in the circular dichroic spectrum. The binding constant calculated by using spectrophotometric data was in the order of 10(5) for both forms of RNA, but it was greater for triplex RNA (30.2 × 10(5) M(-1)) than duplex RNA (3.6 × 10(5) M(-1)). Isothermal titration calorimetric data are in good agreement with the spectrophotometric data. The data indicated stronger binding of CHL to the triplex structure of RNA compared to the native duplex structure. Thermal melting studies indicated greater stabilization of the Hoogsteen base paired third strand of the RNA triplex compared to its Watson-Crick strands. The mode of binding of CHL to both U.A*U and A.U was intercalation as revealed from fluorescence quenching, viscosity measurements and sensitization of the fluorescence experiment. Thermodynamic data obtained from isothermal calorimetric measurements revealed that association was favoured by both a negative enthalpy change and a positive entropy change. Taken together, our results suggest that chelerythrine binds and stabilizes the RNA triplex more strongly than its respective parent duplex. The results presented here may be useful for formulating effective antigene strategies involving benzophenanthridine alkaloids and the RNA triplex.
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Affiliation(s)
- Lucy Haque
- Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
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Jiang S, Pan AW, Lin TY, Zhang H, Malfatti M, Turteltaub K, Henderson PT, Pan CX. Paclitaxel Enhances Carboplatin-DNA Adduct Formation and Cytotoxicity. Chem Res Toxicol 2015; 28:2250-2. [PMID: 26544157 DOI: 10.1021/acs.chemrestox.5b00422] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This rapid report focuses on the pharmacodynamic mechanism of the carboplatin/paclitaxel combination and correlates it with its cytotoxicity. Consistent with the synergistic to additive antitumor activity (the combination index ranging from 0.53 to 0.94), cells exposed to this combination had significantly increased carboplatin-DNA adduct formation when compared to that of carboplatin alone (450 ± 30 versus 320 ± 120 adducts per 10(8) nucleotides at 2 h, p = 0.004). Removal of paclitaxel increased the repair of carboplatin-DNA adducts: 39.4 versus 33.1 adducts per 10(8) nucleotides per hour in carboplatin alone (p = 0.021). This rapid report provides the first pharmacodynamics data to support the use of carboplatin/paclitaxel combination in the clinic.
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Affiliation(s)
- Shuai Jiang
- Department of Internal Medicine, Division of Hematology and Oncology, University of California Davis , 4501 X Street, Room 3016, Sacramento, California 95817, United States
| | - Amy W Pan
- Department of Internal Medicine, Division of Hematology and Oncology, University of California Davis , 4501 X Street, Room 3016, Sacramento, California 95817, United States
| | - Tzu-yin Lin
- Department of Internal Medicine, Division of Hematology and Oncology, University of California Davis , 4501 X Street, Room 3016, Sacramento, California 95817, United States
| | - Hongyong Zhang
- Department of Internal Medicine, Division of Hematology and Oncology, University of California Davis , 4501 X Street, Room 3016, Sacramento, California 95817, United States
| | - Michael Malfatti
- Lawrence Livermore National Laboratory , P.O. Box 808, Livermore, California 94551-0808, United States
| | - Kenneth Turteltaub
- Lawrence Livermore National Laboratory , P.O. Box 808, Livermore, California 94551-0808, United States
| | - Paul T Henderson
- Department of Internal Medicine, Division of Hematology and Oncology, University of California Davis , 4501 X Street, Room 3016, Sacramento, California 95817, United States
| | - Chong-xian Pan
- Department of Internal Medicine, Division of Hematology and Oncology, University of California Davis , 4501 X Street, Room 3016, Sacramento, California 95817, United States.,Department of Urology, University of California Davis , 4501 X Street, Room 3016, Sacramento, California 95817, United States.,Hematology and Oncology, VA Northern California Health Care System , 10535 Hospital Way, Mather, California 95655, United States
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Combinations of alkaloids affecting different molecular targets with the saponin digitonin can synergistically enhance trypanocidal activity against Trypanosoma brucei brucei. Antimicrob Agents Chemother 2015; 59:7011-7. [PMID: 26349826 DOI: 10.1128/aac.01315-15] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Accepted: 08/20/2015] [Indexed: 12/18/2022] Open
Abstract
The flagellate Trypanosoma brucei causes sleeping sickness in humans and nagana in animals. Only a few drugs are registered to treat trypanosomiasis, but those drugs show severe side effects. Also, because some pathogen strains have become resistant, new strategies are urgently needed to combat this parasitic disease. An underexplored possibility is the application of combinations of several trypanocidal agents, which may potentiate their trypanocidal activity in a synergistic fashion. In this study, the potential synergism of mutual combinations of bioactive alkaloids and alkaloids with a membrane-active steroidal saponin, digitonin, was explored with regard to their effect on T. b. brucei. Alkaloids were selected that affect different molecular targets: berberine and chelerythrine (intercalation of DNA), piperine (induction of apoptosis), vinblastine (inhibition of microtubule assembly), emetine (intercalation of DNA, inhibition of protein biosynthesis), homoharringtonine (inhibition of protein biosynthesis), and digitonin (membrane permeabilization and uptake facilitation of polar compounds). Most combinations resulted in an enhanced trypanocidal effect. The addition of digitonin significantly stimulated the activity of almost all alkaloids against trypanosomes. The strongest effect was measured in a combination of digitonin with vinblastine. The highest dose reduction indexes (DRI) were measured in the two-drug combination of digitonin or piperine with vinblastine, where the dose of vinblastine could be reduced 9.07-fold or 7.05-fold, respectively. The synergistic effects of mutual combinations of alkaloids and of alkaloids with digitonin present a new avenue to treat trypanosomiasis but one which needs to be corroborated in future animal experiments.
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Basu P, Kumar GS. A comparative study on the interaction of the putative anticancer alkaloids, sanguinarine and chelerythrine, with single- and double-stranded, and heat-denatured DNAs. J Biomol Struct Dyn 2015; 33:2594-605. [PMID: 25562701 DOI: 10.1080/07391102.2014.1002425] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A detailed investigation on the interaction of two benzophenanthridine alkaloids, sanguinarine (SGR) and chelerythrine (CHL), with the double-stranded (ds), heat-denatured (hd), and single-stranded (ss) DNA was performed by spectroscopy and calorimetry techniques. Binding to the three DNA conformations leads to quenching of fluorescence of SGR and enhancement in the fluorescence of CHL. The binding was cooperative for both of the alkaloids with all the three DNA conformations. The binding constant values of both alkaloids with the ds DNA were in the order of 10(6) M(-1); binding was weak with hd and much weaker to the ss DNA. The fluorescence emission of the alkaloid molecules bound to the ds and hd DNAs was quenched much less compared to those bound to the ss DNA based on competition with the anionic quencher KI. For both double stranded and heat denatured structures the emission of the bound alkaloid molecules was polarized significantly and strong energy transfer from the DNA bases to the alkaloid molecules occurred. Intercalation of SGR and CHL to ds, hd, and ss DNA was proved from these fluorescence results. Calorimetric studies suggested that the binding to all DNA conformations was both enthalpy and entropy favored. Both the alkaloids preferred double-helical regions for binding, but SGR was a stronger binder than CHL to all the three DNA structures.
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Affiliation(s)
- Pritha Basu
- a Biophysical Chemistry Laboratory , CSIR-Indian Institute of Chemical Biology , 4, Raja S. C. Mullick Road, Kolkata 700 032 , India
| | - Gopinatha Suresh Kumar
- a Biophysical Chemistry Laboratory , CSIR-Indian Institute of Chemical Biology , 4, Raja S. C. Mullick Road, Kolkata 700 032 , India
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Pradhan AB, Haque L, Bhuiya S, Das S. Induction of self-structure in polyriboadenylic acid by the benzophenanthridine plant alkaloid chelerythrine: a spectroscopic approach. RSC Adv 2014. [DOI: 10.1039/c4ra07075e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Induction of self-structure in polyriboadenylic acid by chelerythrine.
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Affiliation(s)
| | - Lucy Haque
- Department of Chemistry
- Jadavpur University
- Kolkata 700 032, India
| | - Sutanwi Bhuiya
- Department of Chemistry
- Jadavpur University
- Kolkata 700 032, India
| | - Suman Das
- Department of Chemistry
- Jadavpur University
- Kolkata 700 032, India
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Hong GY, Jeong YI, Lee SJ, Lee E, Oh JS, Lee HC. Combination of paclitaxel- and retinoic acid-incorporated nanoparticles for the treatment of CT-26 colon carcinoma. Arch Pharm Res 2011; 34:407-17. [DOI: 10.1007/s12272-011-0308-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2010] [Revised: 11/29/2010] [Accepted: 11/30/2010] [Indexed: 10/18/2022]
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Yang S, Xiang J, Yang Q, Zhou Q, Zhang X, Li Q, Tang Y, Xu G. Distinct G-quadruplex structures of human telomeric DNA formed by the induction of sanguinarine and nitidine under salt-deficient condition. Fitoterapia 2010; 81:1026-32. [DOI: 10.1016/j.fitote.2010.06.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2010] [Revised: 06/21/2010] [Accepted: 06/27/2010] [Indexed: 11/15/2022]
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Yang S, Xiang J, Yang Q, Li Q, Zhou Q, Zhang X, Tang Y, Xu G. Formation of Human Telomeric G-quadruplex Structures Induced by the Quaternary Benzophenanthridine Alkaloids: Sanguinarine, Nitidine, and Chelerythrine. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.201090145] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Reuter CWM, Morgan MA, Ivanyi P, Fenner M, Ganser A, Grünwald V. Carboplatin plus weekly docetaxel as salvage chemotherapy in docetaxel-resistant and castration-resistant prostate cancer. World J Urol 2010; 28:391-8. [PMID: 20229232 DOI: 10.1007/s00345-010-0527-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2009] [Accepted: 02/23/2010] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND There is no proven, effective, standard second-line chemotherapy for castration- and docetaxel-resistant prostate cancer (DRPC). Recent data suggest that carboplatin may be effective in combination with docetaxel in this setting; however, the optimal docetaxel/carboplatin-based regimen is still unclear. AIM OF THE STUDY We identified 43 consecutive patients with DRPC treated with carboplatin (AUC5 d1) and docetaxel (35 mg/m(2) d1, 8, 15 q4w i.v.) as a second-line or subsequent salvage chemotherapy until discontinuation of therapy due to disease progression or unacceptable toxicity. RESULTS Decreased prostate-specific antigen (> or =50% PSA) was observed in 22/43 (51.2%, 95% CI, 35.5, 66.7%) patients, with > or =90% reduction in 12/43 patients (27.9%). At the time of analysis, the median follow-up time for all patients was 10.4 months. Median progression-free survival (PFS) for all patients was 6.5 months (95% CI 4.1, 8.9), and median overall survival (OS) was 15.8 months (95% CI 12.1, 18.5). In PSA responders, PFS was 9.5 (95% CI 8.2, 19.0) months versus 3.3 (95% CI 2.6, 4.0) months in PSA non-responders (P < 0.0001; hazard ratio (HR) 0.108) and OS was 24.4 months (95% CI 19.5, 29.4) versus 7.8 (95% CI 5.2, 10.3) months (P = 0.001; HR 0.232). Established prognostic factors were associated with survival. This regimen was reasonably well tolerated, with leukopenia/neutropenia as the most common reversible grade 3/4 toxicity (41.9/39.5%). CONCLUSION These data suggest that weekly docetaxel plus carboplatin may be an important therapeutic second-line treatment option for patients with DRPC.
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Affiliation(s)
- Christoph W M Reuter
- Department of Hematology, Hemostasis, Oncology, and Stem Cell Transplantation, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany.
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Maiti M, Kumar GS. Polymorphic nucleic Acid binding of bioactive isoquinoline alkaloids and their role in cancer. J Nucleic Acids 2009; 2010. [PMID: 20814427 PMCID: PMC2915887 DOI: 10.4061/2010/593408] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2009] [Revised: 09/11/2009] [Accepted: 09/14/2009] [Indexed: 12/20/2022] Open
Abstract
Bioactive alkaloids occupy an important position in applied chemistry and play an indispensable role in medicinal chemistry. Amongst them, isoquinoline alkaloids like berberine, palmatine and coralyne of protoberberine group, sanguinarine of the benzophenanthridine group, and their derivatives represent an important class of molecules for their broad range of clinical and pharmacological utility. In view of their extensive occurrence in various plant species and significantly low toxicities, prospective development and use of these alkaloids as effective anticancer agents are matters of great current interest. This review has focused on the interaction of these alkaloids with polymorphic nucleic acid structures (B-form, A-form, Z-form, HL-form, triple helical form, quadruplex form) and their topoisomerase inhibitory activity reported by several research groups using various biophysical techniques like spectrophotometry, spectrofluorimetry, thermal melting, circular dichroism, NMR spectroscopy, electrospray ionization mass spectroscopy, viscosity, isothermal titration calorimetry, differential scanning calorimetry, molecular modeling studies, and so forth, to elucidate their mode and mechanism of action for structure-activity relationships. The DNA binding of the planar sanguinarine and coralyne are found to be stronger and thermodynamically more favoured compared to the buckled structure of berberine and palmatine and correlate well with the intercalative mechanism of sanguinarine and coralyne and the partial intercalation by berberine and palmatine. Nucleic acid binding properties are also interpreted in relation to their anticancer activity.
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Affiliation(s)
- Motilal Maiti
- Biophysical Chemistry Laboratory, Indian Institute of Chemical Biology (CSIR), Kolkata 700032, India
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Maiti M, Kumar GS. Biophysical aspects and biological implications of the interaction of benzophenanthridine alkaloids with DNA. Biophys Rev 2009; 1:119-129. [PMID: 28509993 DOI: 10.1007/s12551-009-0014-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2009] [Accepted: 08/03/2009] [Indexed: 10/20/2022] Open
Abstract
Benzophenanthridine alkaloids represent a very interesting and significant group of natural products that exhibit a broad range of biological and pharmacological properties. Among this group of alkaloids, sanguinarine, nitidine, fagaronine, and chelerythrine have the potential to form molecular complexes with DNA structures and have attracted recent attention for their possible clinical and pharmacological utility. This review focuses on the interaction of these alkaloids with polymorphic DNA structures (B-form, Z-form, HL-form, and triple helical form) reported by several research groups employing various physical techniques such as spectrophotometry, spectrofluorimetry, circular dichroism, NMR spectroscopy, thermal melting, viscometry as well as thermodynamic analysis by isothermal titration calorimetry and differential scanning calorimetry to elucidate the mode and mechanism of action at the molecular level to determine the structure-activity relationship. DNA binding properties of these alkaloids are interpreted in relation to their biological activity.
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Affiliation(s)
- Motilal Maiti
- Biophysical Chemistry Laboratory, Indian Institute of Chemical Biology, Kolkata, 700032, India.
| | - Gopinatha Suresh Kumar
- Biophysical Chemistry Laboratory, Indian Institute of Chemical Biology, Kolkata, 700032, India
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Mimeault M, Mehta PP, Hauke R, Henichart JP, Depreux P, Lin MF, Batra SK. Improvement of cytotoxic effects induced by mitoxantrone on hormone-refractory metastatic prostate cancer cells by co-targeting epidermal growth factor receptor and hedgehog signaling cascades. Growth Factors 2007; 25:400-16. [PMID: 18365871 DOI: 10.1080/08977190801930935] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The results of the present study revealed for the first time the possibility to use a combination of mitoxantrone with gefitinib and cyclopamine for inhibiting the growth of epidermal growth factor (EGF), sonic hedgehog- (SHHNp), and serum-stimulated androgen-sensitive LNCaP-C33 and androgen-independent (AI) LNCaP-C81, DU145 and PC3 prostate cancer (PC) cells. The supra-additive anti-proliferative effects of drugs were mediated via a blockade of the PC3 cells in the G(1) and G(2)M phases of the cell cycle. Importantly, the combination of mitoxantrone plus gefitinib and/or cyclopamine also caused a higher rate of apoptotic death of PC cells including enriched fraction of CD44(high) PC3 cell subpopulation as compared to the individual agents or bi-combination of drugs. The cytotoxic effects induced by mitoxantrone, gefitinib and cyclopamine on PC3 cells appear to be at least partly mediated through the depolarization of the mitochondrial membrane, release of cytochrome c into the cytosol, hydrogen peroxide production and activation of caspase cascades. These findings indicate that the simultaneous blockade of EGF-EGFR and sonic hedgehog tumorigenic signaling cascades may represent a promising strategy for improving the efficacy of current mitoxantrone-based therapies against incurable AI and metastatic PCs in the clinics.
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Affiliation(s)
- Murielle Mimeault
- Department of Biochemistry and Molecular Biology, College of Medicine, Eppley Institute of Cancer and Allied Diseases, 985870 University of Nebraska Medical Center, Omaha, NE 68198-5870, USA.
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Bai LP, Zhao ZZ, Cai Z, Jiang ZH. DNA-binding affinities and sequence selectivity of quaternary benzophenanthridine alkaloids sanguinarine, chelerythrine, and nitidine. Bioorg Med Chem 2006; 14:5439-45. [PMID: 16730995 DOI: 10.1016/j.bmc.2006.05.012] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2006] [Revised: 04/28/2006] [Accepted: 05/02/2006] [Indexed: 10/24/2022]
Abstract
A comparative study on the intercalating binding of sanguinarine, chelerythrine, and nitidine with CT DNA, poly(dG-dC).poly(dG-dC), poly(dA-dT).poly(dA-dT), and seven sequence-designed double-stranded oligodeoxynucleotides has been performed using fluorometric and spectrophotometric techniques, aiming at providing insights into their sequence selectivity for DNA-binding. The results show that both sanguinarine and nitidine bind preferentially to DNA containing alternating GC base pairs [d(TGCGCA)(2)], while chelerythrine exhibits quite distinct sequence selectivity from sanguinarine, which shows a high specificity for DNA containing contiguous GC base pairs [5'-TGGGGA-3'/3'-ACCCCT-5'].
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Affiliation(s)
- Li-Ping Bai
- School of Chinese Medicine, Hong Kong Baptist University, Kowloon Tong
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