1
|
An SSA, Shim KH, Kang S, Kim YK, Subedi L, Cho H, Hong SM, Tan MA, Jeon R, Chang KA, Kim SY. The potential anti-amyloidogenic candidate, SPA1413, for Alzheimer's disease. Br J Pharmacol 2021; 179:1033-1048. [PMID: 34610141 DOI: 10.1111/bph.15691] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Revised: 08/23/2021] [Accepted: 09/02/2021] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND AND PURPOSE Recently, isoflavone derivatives have been shown to have neuroprotective effects against neurological disorders. For instance, genistein attenuated the neuroinflammation and amyloid-β accumulation in Alzheimer's disease animal models, suggesting the potential for use to prevent and treat Alzheimer's disease. EXPERIMENTAL APPROACH Here, 50 compounds, including isoflavone derivatives, were constructed and screened for the inhibitory effects on amyloid-β42 fibrilization and oligomerization using the high-throughput screening formats of thioflavin T assay and multimer detection system, respectively. The potential neuroprotective effect of t3-(4-hydroxyphenyl)-2H-chromen-7-ol (SPA1413), also known as dehydroequol, idronoxil or phenoxodiol, was evaluated in cells and in 5xFAD (B6SJL) transgenic mouse, a model of Alzheimer's disease. KEY RESULTS SPA1413 had a potent inhibitory action on both amyloid-β fibrilization and oligomerization. In the cellular assay, SPA1413 prevented amyloid-β-induced cytotoxicity and reduced neuroinflammation. Remarkably, the oral administration of SPA1413 ameliorated cognitive impairment, decreased amyloid-β plaques and activated microglia in the brain of 5xFAD (B6SJL) transgenic mouse. CONCLUSION AND IMPLICATIONS Our results strongly support the repurposing of SPA1413, which has already received fast-track status from the US Food and Drug Administration (FDA) for cancer treatment, for the treatment of Alzheimer's disease due to its potent anti-amyloidogenic and anti-neuroinflammatory actions.
Collapse
Affiliation(s)
- Seong Soo A An
- Department of Bionano Technology, Gachon University, Gyeonggi-do, Republic of Korea
| | - Kyu Hwan Shim
- Department of Bionano Technology, Gachon University, Gyeonggi-do, Republic of Korea.,Department of Neurology, Veterans Medical Research Institute, Veterans Health Service Medical Center, Seoul, Republic of Korea
| | - Shinwoo Kang
- Department of Pharmacology, College of Medicine, Gachon University, Incheon, Republic of Korea.,Neuroscience Research Institute, Gachon University, Incheon, Republic of Korea
| | - Young Kyo Kim
- Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon, Republic of Korea
| | - Lalita Subedi
- Department of Pharmacy, Gachon University, Incheon, Republic of Korea
| | - Hyewon Cho
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Sookmyung Women's University, Seoul, Republic of Korea
| | - Seong-Min Hong
- Department of Pharmacy, Gachon University, Incheon, Republic of Korea
| | - Mario A Tan
- Department of Bionano Technology, Gachon University, Gyeonggi-do, Republic of Korea.,College of Science, University of Santo Tomas, Manila, Philippines
| | - Raok Jeon
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Sookmyung Women's University, Seoul, Republic of Korea
| | - Keun-A Chang
- Department of Pharmacology, College of Medicine, Gachon University, Incheon, Republic of Korea.,Neuroscience Research Institute, Gachon University, Incheon, Republic of Korea.,Department of Health Sciences and Technology, GAIHST, Gachon University, Incheon, Republic of Korea
| | - Sun Yeou Kim
- Department of Pharmacy, Gachon University, Incheon, Republic of Korea
| |
Collapse
|
2
|
Coward JI, Barve MA, Kichenadasse G, Moore KN, Harnett PR, Berg D, Garner JS, Dizon DS. Maximum Tolerated Dose and Anti-Tumor Activity of Intraperitoneal Cantrixil (TRX-E-002-1) in Patients with Persistent or Recurrent Ovarian Cancer, Fallopian Tube Cancer, or Primary Peritoneal Cancer: Phase I Study Results. Cancers (Basel) 2021; 13:3196. [PMID: 34206826 PMCID: PMC8268018 DOI: 10.3390/cancers13133196] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/24/2021] [Accepted: 06/24/2021] [Indexed: 12/20/2022] Open
Abstract
Survival outcomes in ovarian cancer are poor. The aims of this Phase I progressive design study (NCT02903771) were to evaluate the maximum tolerated dose (MTD), tolerability, and antitumor activity of Cantrixil-a novel third-generation benzopyran molecule-in patients (n = 25) with advanced, recurrent/persistent epithelial ovarian, primary peritoneal, or fallopian tube cancer. All had completed ≥ 2 prior regimens; 3 (12%) had platinum-refractory disease, and 17 (68%) had platinum-resistant disease. Following intraperitoneal (IP) port placement, patients received weekly IP Cantrixil in 3-week cycles as monotherapy (Cycles 1-2), and then in combination with intravenous (IV) chemotherapy (Cycles 3-8). Part A (dose escalation) enrolled 11 patients in 6 dose-level cohorts. An MTD of 5 mg/kg was established with dose-limiting toxicity of ileus. Most treatment-related adverse events were gastrointestinal. Across Parts A and B (dose expansion), 16 (64%) patients received ≥ 1 3-week Cantrixil cycle, and had ≥ 1 post-baseline efficacy measurement available. The results show promising anti-tumor activity in monotherapy (stable disease rate of 56%) and in combination with IV chemotherapy (objective response rate of 19%, disease control rate of 56%, and median progression-free survival of 13.1 weeks). The molecular target and mechanism of action of Cantrixil are yet to be confirmed. Preliminary analysis of stem cell markers suggests that IP Cantrixil might induce ovarian cancer stem cell death and sensitize cells to standard chemotherapy, warranting further evaluation.
Collapse
Affiliation(s)
- Jermaine I. Coward
- ICON Cancer Centre, South Brisbane, QLD 4101, Australia
- School of Medicine, University of Queensland, Brisbane, QLD 4072, Australia
| | - Minal A. Barve
- Mary Crowley Cancer Research Center, Dallas, TX 75251, USA;
| | | | - Kathleen N. Moore
- Department of Gynecologic Oncology, University of Oklahoma Health Science Center, Stephenson Cancer Center, Oklahoma City, OK 73104, USA;
| | - Paul R. Harnett
- Crown Princess Mary Cancer Centre, Westmead, NSW 2145, Australia;
| | - Daniel Berg
- Formerly of Kazia Therapeutics Ltd., Sydney, NSW 2000, Australia;
| | | | - Don S. Dizon
- Lifespan Cancer Institute, Providence, RI 02913, USA;
- The Warren Alpert Medical School, Brown University, Providence, RI 02912, USA
| |
Collapse
|
3
|
Kiknavelidze K, Shavdia M, Chikhladze N, Abshilava L, Messina M, Mautner G, Kelly G. NOX66 as Monotherapy, and in Combination With Carboplatin, in Patients With Refractory Solid Tumors: Phase Ia/b Study. Curr Ther Res Clin Exp 2021; 94:100631. [PMID: 34306271 PMCID: PMC8296080 DOI: 10.1016/j.curtheres.2021.100631] [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: 11/24/2020] [Accepted: 03/22/2021] [Indexed: 11/23/2022] Open
Abstract
NOX66 contains idronoxil, formulated as a rectal suppository. CEP-1 is the first study to assess NOX66 in patients with refractory solid tumors. NOX66 was well tolerated at 400/800 mg as monotherapy and combined with carboplatin. The safety profile justifies continuation of the NOX66 clinical research program. Early results suggest most patients had stable disease by study end
Background Although oral and intravenous forms of idronoxil have been well tolerated, the safety of NOX66, with idronoxil formulated as a rectal suppository, is not known. This Phase Ia/b clinical study (protocol No. NOX66-001A), known as Chemotherapy Enhancement Program-1, is the first to assess NOX66 in patients with refractory solid tumors. Objective The study aimed to determine the safety profile of NOX66 both as a monotherapy and in combination with carboplatin, and to evaluate whether or not NOX66 has a meaningful anticancer effect when combined with carboplatin in this patient population. Methods Chemotherapy Enhancement Program-1 was a multicenter, open-label, nonrandomized, 2-dose cohort study of NOX66 as monotherapy (Phase Ia) and in combination with carboplatin (Phase Ib). Patients with refractory solid tumors who had stopped responding to standard treatments were eligible to participate. Twenty patients were screened and 19 enrolled in the study. They were divided into 2 groups: cohort 1 (n = 8) received 1 suppository daily (400 mg) and cohort 2 (n = 11) received 2 suppositories daily (800 mg) for 14 consecutive days followed by 7 days of rest. Patients who completed Phase Ia without significant toxicity continued to Phase Ib, where NOX66 was combined with carboplatin for up to 6x 28-day treatment cycles, with low-dose carboplatin (600 mg) for cycles 1B through 3B and standard dose carboplatin (900 mg) for cycles 4B through 6B. The main outcomes assessed were safety (n = 18) and efficacy signals (n = 14). Results NOX66 generally was well tolerated at 400 mg and 800 mg, both as monotherapy and in combination with carboplatin in patients with refractory solid tumors. The safety profile was consistent for oncology patients, with 77.8% experiencing at least 1 treatment-emergent adverse event. The most common adverse events were blood and lymphatic system disorders (44.4%), with only anemia considered as possibly related to NOX66. Although the study was primarily designed to assess safety and tolerability, the efficacy measurements demonstrated that most patients had stable disease or better by study end. Conclusions The favorable safety profile of NOX66 provides reassurance to justify continuation of clinical research. The efficacy findings are encouraging in terms of the chemosensitizing potential of NOX66 in refractory solid tumors. (Curr Ther Res Clin Exp. 2021; 82:XXX–XXX)
Collapse
Affiliation(s)
- Koba Kiknavelidze
- Oncology Unit, Z Tskhakaia West Georgia National Center of Interventional Medicine, Kutaisi, Georgia
| | | | - Nana Chikhladze
- First Clinic of Tbilisi State Medical University, Tbilisi, Georgia
| | - Lia Abshilava
- Medulla-Chemotherapy and Immunotherapy Center, Tbilisi, Georgia
| | | | | | - Graham Kelly
- Noxopharm Limited, Gordon, New South Wales, Australia
| |
Collapse
|
4
|
Sak K. Role of semisynthetic flavonoids on cytotoxic chemotherapy—Dual benefit to cancer patients? Toxicology 2021. [DOI: 10.1016/b978-0-12-819092-0.00047-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
5
|
Yaylaci E, Onen HI, Yar Saglam AS. Phenoxodiol sensitizes metastatic colorectal cancer cells to 5-fluorouracil- and oxaliplatin-induced apoptosis through intrinsic pathway. EXCLI JOURNAL 2020; 19:936-949. [PMID: 32665777 PMCID: PMC7355152 DOI: 10.17179/excli2020-2042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 06/25/2020] [Indexed: 11/10/2022]
Abstract
Colorectal cancer (CRC) is one of the most common types of cancer seen in the world. 5-Fluorouracil (5-Fu) plus Oxaliplatin (1-OHP) remains the backbone of CRC chemotherapeutics, but with limited success. Phenoxodiol (Pxd) is an isoflavone analog with antitumor activity against various types of cancers, and sensitizes chemoresistant cancer cells to chemotherapeutics including platinum and taxanes. This study was, therefore, undertaken to examine whether Pxd pre-treatment with conventional chemotherapeutic agent(s) 5-Fu and 1-OHP co-administration be a therapeutic strategy for CRC. Cell viability and cytotoxicity were evaluated using dimethyl-thiazolyl diphenyl tetrazolium bromide (MTT) and lactate dehydrogenase assays. The percentage of apoptotic and necrotic cells were determined by fluorescence microscopy analysis. Besides, active Caspase-3 levels by ELISA and relative mRNA levels of Caspase 3 (CASP3), CASP8 and CASP9 genes were determined by quantitative real-time PCR (qPCR) analysis. The pre-treatment of Pxd followed by 5-Fu and 1-OHP co-administration was more effective at inhibiting cell viability than either chemotherapeutic agents treatment alone. When compared to 5-Fu with 1-OHP alone treatment, Pxd pre-treatment overwhelmingly increased apoptotic Caspase-3 activity levels in CRC cells. Moreover, qPCR analyses showed that CASP3 and CASP9 mRNA levels significantly increased after pre-treatment with Pxd followed by 5-Fu and 1-OHP treatments, compared to 5-Fu with 1-OHP alone. Our results suggested that Pxd enhanced the in vitro antitumor activity of 5-Fu and 1-OHP. Our study also suggested that Pxd may be a potential candidate agent in advanced CRC and inclusion of Pxd to the conventional chemotherapeutic agent(s) could be an effective therapeutic strategy for CRC.
Collapse
Affiliation(s)
- Esra Yaylaci
- Department of Medical Biology and Genetics, Faculty of Medicine, Gazi University, Besevler, Ankara, Turkey
| | - Hacer Ilke Onen
- Department of Medical Biology and Genetics, Faculty of Medicine, Gazi University, Besevler, Ankara, Turkey
| | - Atiye Seda Yar Saglam
- Department of Medical Biology and Genetics, Faculty of Medicine, Gazi University, Besevler, Ankara, Turkey
| |
Collapse
|
6
|
Yee EMH, Cirillo G, Brandl MB, Black DS, Vittorio O, Kumar N. Synthesis of Dextran-Phenoxodiol and Evaluation of Its Physical Stability and Biological Activity. Front Bioeng Biotechnol 2019; 7:183. [PMID: 31440502 PMCID: PMC6694440 DOI: 10.3389/fbioe.2019.00183] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 07/15/2019] [Indexed: 12/04/2022] Open
Abstract
Phenoxodiol, an isoflavene anti-tumor agent, was conjugated on the polysaccharide dextran using immobilized laccase as biocatalyst. The success of the enzymatic conjugation was determined by UV-vis spectrophotometry and its functionalization degree was assessed by 1H NMR and was found to be 3.25 mg phenoxodiol/g of conjugate. An accelerated stability test showed that the resultant conjugate was nine times more stable than the free phenoxodiol when tested for its residual anti-oxidant activity with the Folin-Ciocalteu assay. The in vitro anti-proliferative activity of the conjugate was evaluated against neuroblastoma SKN-BE(2)C, triple-negative breast cancer MDA-MB-231, and glioblastoma U87 cancer cells. The conjugate was shown to be generally more potent than phenoxodiol against all three cell types tested. Additionally, the cytotoxicity and anti-angiogenic activity of the conjugate were also evaluated against non-malignant human lung fibroblast MRC-5 and human microvascular endothelial cells HMEC-1, respectively. The conjugate was found to be 1.5 times less toxic than phenoxodiol while mostly retaining 62% of its anti-angiogenic activity in the conjugate form. This study provides further evidence that the conjugation of natural product-derived drugs onto polysaccharide molecules such as dextran can lead to better stability and enhanced biological activity of the conjugate compared to the free drug alone.
Collapse
Affiliation(s)
- Eugene M. H. Yee
- School of Chemistry, University of New South Wales, Sydney, NSW, Australia
| | - Giuseppe Cirillo
- Department of Pharmacy Health and Nutritional Sciences, University of Calabria, Rende, Italy
| | - Miriam B. Brandl
- Lowy Cancer Research Centre, Children's Cancer Institute, University of New South Wales, Sydney, NSW, Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Australian Centre for NanoMedicine, University of New South Wales, Sydney, NSW, Australia
| | - David StC Black
- School of Chemistry, University of New South Wales, Sydney, NSW, Australia
| | - Orazio Vittorio
- Lowy Cancer Research Centre, Children's Cancer Institute, University of New South Wales, Sydney, NSW, Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Australian Centre for NanoMedicine, University of New South Wales, Sydney, NSW, Australia
| | - Naresh Kumar
- School of Chemistry, University of New South Wales, Sydney, NSW, Australia
| |
Collapse
|
7
|
Triggering of eryptosis, the suicidal erythrocyte death, by phenoxodiol. Naunyn Schmiedebergs Arch Pharmacol 2019; 392:1311-1318. [PMID: 31280326 DOI: 10.1007/s00210-019-01681-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 06/19/2019] [Indexed: 12/14/2022]
Abstract
Phenoxodiol is used for the treatment of malignancy. The substance is effective by triggering suicidal tumor cell death or apoptosis. At least in theory, phenoxodiol could similarly stimulate suicidal erythrocyte death or eryptosis. Eryptosis is characterized by cell shrinkage and breakdown of cell membrane asymmetry with phosphatidylserine translocation to the erythrocyte surface. Signaling of eryptosis includes increase of cytosolic Ca2+ activity ([Ca2+]i), formation of reactive oxygen species (ROS), and increase of ceramide abundance at the cell surface. The present study explored whether phenoxodiol induces eryptosis and whether it modifies Ca2+ entry, ROS, and ceramide. Using flow cytometry, phosphatidylserine exposure at the cell surface was quantified from annexin V binding, cell volume from forward scatter, [Ca2+]i from Fluo3 fluorescence, ROS from DCFDA-dependent fluorescence, and ceramide abundance utilizing specific antibodies. A 48-h exposure of human erythrocytes to phenoxodiol (100 μg/ml [416 μM]) significantly increased the percentage of annexin V binding cells, significantly decreased average forward scatter and Fluo3 fluorescence and significantly increased ceramide abundance, but did not significantly modify DCFDA fluorescence. The effect of phenoxodiol on annexin V binding tended to decrease following removal of extracellular Ca2+, an effect, however, not reaching statistical significance. In conclusion, phenoxodiol triggers eryptosis, an effect paralleled by increase of ceramide abundance.
Collapse
|
8
|
Saif M, Ager EI, Field P, Lilischkis KJ. The role of cancer stem cells and the therapeutic potential of TRX-E-002-1 in ovarian cancer. Expert Opin Orphan Drugs 2018. [DOI: 10.1080/21678707.2018.1508339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Muhammad Saif
- GI Oncology & Exp. Therapeutics, Tufts Medical Center, Tufts University School of Medicine, Boston, MA, USA
| | - E. I. Ager
- Kazia Therapeutics, Three International Towers Level 24, Sydney, Australia
| | | | - K. J. Lilischkis
- Kazia Therapeutics, Three International Towers Level 24, Sydney, Australia
| |
Collapse
|
9
|
Stevenson AJ, Ager EI, Proctor MA, Škalamera D, Heaton A, Brown D, Gabrielli BG. Mechanism of action of the third generation benzopyrans and evaluation of their broad anti-cancer activity in vitro and in vivo. Sci Rep 2018; 8:5144. [PMID: 29572477 PMCID: PMC5865165 DOI: 10.1038/s41598-018-22882-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 01/19/2018] [Indexed: 11/10/2022] Open
Abstract
Successive rounds of chemical modification in three generations of benzopyran molecules have shown to select for different mechanisms of actions and progressive increases in anti-cancer activity. In this study, we investigated the mechanism of action of the third-generation benzopyran compounds, TRX-E-002-1 and TRX-E-009-1. High-content screening of a panel of 240 cancer cell lines treated with TRX-E-009-1 demonstrated it has broad anti-cancer potential. Within this screen, melanoma cell lines showed a range of sensitivities and subsequently a second independent panel of 21 melanoma 3D spheroid lines were assessed for their responses to both TRX-E-002-1 and TRX-E-009-1 compounds. Time-lapse microscopy illustrated both of these compounds caused mitotic delays in treated cells, resulting in either mitotic slippage or apoptosis. This finding along with immunostaining, in vitro polymerization assays, and animal experiments in both athymic and immunocompetent mice, demonstrates that these third-generation benzopyran compounds are potent tubulin polymerization inhibitors in vitro and in vivo, and this is the molecular basis of their anti-cancer activity in melanoma. These findings indicate these BP compounds may offer a novel anti-microtubule strategy for cancer intervention and provides the basis for further investigation into biomarkers of clinical sensitivity.
Collapse
Affiliation(s)
- Alexander J Stevenson
- Mater Research Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | | | - Martina A Proctor
- Mater Research Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | - Dubravka Škalamera
- Mater Research Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | - Andrew Heaton
- Novogen Ltd., Hornsby, New South Wales, Australia.,School of Medical Sciences, University of New South Wales Australia, Sydney, New South Wales, Australia
| | - David Brown
- Novogen Ltd., Hornsby, New South Wales, Australia.,School of Medical Sciences, University of New South Wales Australia, Sydney, New South Wales, Australia
| | - Brian G Gabrielli
- Mater Research Institute, The University of Queensland, Translational Research Institute, Brisbane, QLD, Australia.
| |
Collapse
|
10
|
Jeyaraju DV, Hurren R, Wang X, MacLean N, Gronda M, Shamas-Din A, Minden MD, Giaever G, Schimmer AD. A novel isoflavone, ME-344, targets the cytoskeleton in acute myeloid leukemia. Oncotarget 2018; 7:49777-49785. [PMID: 27391350 PMCID: PMC5226547 DOI: 10.18632/oncotarget.10446] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 06/26/2016] [Indexed: 01/08/2023] Open
Abstract
The isoflavone ME-344 is a potent anti-cancer agent with preclinical and clinical efficacy in solid tumors. Yet, the mechanism of action of ME-344 has not been fully defined and the preclinical efficacy in leukemia has not been established. Therefore, we investigated the anti-leukemic properties and mechanism of action of ME-344. In a panel of 7 leukemia cell lines, ME-344 was cytotoxic with an IC50 in the range of 70–260 nM. In addition, ME-344 was cytotoxic to primary AML patient samples over normal hematopoietic cells. In an OCI-AML2 xenograft model, ME-344 reduced tumor growth by up to 95% of control without evidence of toxicity. Mechanistically, ME-344 increased mitochondrial ROS generation in leukemic cells. However, antioxidant treatment did not rescue cell death, suggesting that ME-344 had additional targets beyond the mitochondria. We demonstrated that ME-344 inhibited tubulin polymerization by interacting with tubulin near the colchicine-binding site. Furthermore, inhibition of tubulin polymerization was functionally important for ME-344 induced death. Finally, we showed that ME-344 synergizes with vinblastine in leukemia cells. Thus, our study demonstrates that ME-344 displays preclinical efficacy in leukemia through a mechanism at least partly related to targeting tubulin polymerization.
Collapse
Affiliation(s)
- Danny V Jeyaraju
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Rose Hurren
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Xiaoming Wang
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Neil MacLean
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Marcela Gronda
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Aisha Shamas-Din
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Mark D Minden
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Guri Giaever
- Department of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Aaron D Schimmer
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| |
Collapse
|
11
|
Yee EMH, Hook JM, Bhadbhade MM, Vittorio O, Kuchel RP, Brandl MB, Tilley RD, Black DS, Kumar N. Preparation, characterization and in vitro biological evaluation of (1:2) phenoxodiol-β-cyclodextrin complex. Carbohydr Polym 2017; 165:444-454. [PMID: 28363571 DOI: 10.1016/j.carbpol.2017.02.081] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 02/06/2017] [Accepted: 02/20/2017] [Indexed: 12/29/2022]
Abstract
Phenoxodiol is an isoflavone analogue that possesses potent anticancer properties. However, the poor water solubility of phenoxodiol limits its overall efficacy as an anticancer agent. To overcome this, β-cyclodextrin was used to encapsulate phenoxodiol. The phenoxodiol-β-cyclodextrin complex was prepared via a modified co-evaporation method and characterized by 1H NMR and X-ray crystallography, revealing a 1:2 stoichiometry. The 2D ROESY NMR spectroscopy suggested the limited motion of phenoxodiol within the cavity of β-cyclodextrin while the X-ray crystal data displays by far the best 'ship-in-a-bottle' case of 1:2 inclusion complex. The aqueous solubility of the phenoxodiol in β-cyclodextrin had improved and the in vitro biological evaluation revealed enhanced anti-proliferative activity against three cancer cell lines. Additionally, the toxicity of the complex against normal human cell line was 2.5 times lower. These data indicates that the encapsulation of phenoxodiol into β-cyclodextrin leads to an improvement in its overall water solubility and biological activity.
Collapse
Affiliation(s)
- Eugene M H Yee
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia
| | - James M Hook
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Mohan M Bhadbhade
- Mark Wainwright Analytical Centre, The University of New South Wales, UNSW, Sydney, Australia
| | - Orazio Vittorio
- Children's Cancer Institute Australia, Lowy Cancer Research Centre, The University of New South Wales, Sydney, Australia; ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Australian Centre for NanoMedicine, The University of New South Wales, NSW, Sydney, Australia
| | - Rhiannon P Kuchel
- Mark Wainwright Analytical Centre, The University of New South Wales, UNSW, Sydney, Australia
| | - Miriam B Brandl
- Children's Cancer Institute Australia, Lowy Cancer Research Centre, The University of New South Wales, Sydney, Australia; ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Australian Centre for NanoMedicine, The University of New South Wales, NSW, Sydney, Australia
| | - Richard D Tilley
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia; Mark Wainwright Analytical Centre, The University of New South Wales, UNSW, Sydney, Australia
| | - David StC Black
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Naresh Kumar
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia.
| |
Collapse
|
12
|
Saif MW, Heaton A, Lilischkis K, Garner J, Brown DM. Pharmacology and toxicology of the novel investigational agent Cantrixil (TRX-E-002-1). Cancer Chemother Pharmacol 2016; 79:303-314. [PMID: 28013349 PMCID: PMC5306062 DOI: 10.1007/s00280-016-3224-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 12/12/2016] [Indexed: 12/19/2022]
Abstract
PURPOSE Recurrent, chemo-resistant ovarian cancer is thought to be due to a subgroup of slow-growing, drug-resistant cancer cells with stem-like properties and a high capacity for tumour repair. Cantrixil targets this sub-population of cells and is being developed as an intraperitoneal therapy to be used as first-line therapy in combination with carboplatin for epithelial ovarian cancer. The studies presented here justify further development. METHODS A GLP dog CV study using a 4 × 4 Latin Square Crossover study was conducted using telemetric ECG recordings from dogs post IP administration to assess for cardiac abnormalities. Mutagenic potential was assessed using the bacterial reverse mutation assay. Clastogenicity was assessed by determining micronuclei formation in the bone marrow of SPF Arc(S) Swiss mice dosed at clinical concentrations. TRX-E-002-1 toxicology was evaluated in GLP-compliant MTD and 28-day repeat-dose studies in rats and dogs. RESULTS In vitro TRX-E-002-1 has potent cytotoxic activity against human cancer cells including CD44+/MyD88+ ovarian cancer stem cells. TRX-E-002-1 increased phosphorylated c-Jun levels in these cancer cells resulting in caspase-mediated apoptosis. In vivo, Cantrixil was active in a model of disseminated ovarian cancer as a monotherapy and in combination with Cisplatin. Cantrixil was active as maintenance therapy in a model of drug-resistant, recurrent ovarian cancer and in an orthotopic model of pancreatic cancer. CONCLUSIONS In animals, this clinical formulation and route of administration of Cantrixil demonstrated acceptable activity, safety pharmacology, genotoxicity and toxicology profile and constituted a successful Investigational New Drug application to the US Food and Drug Administration.
Collapse
Affiliation(s)
- Muhammad Wasif Saif
- Department of Medicine and Cancer Center, Tufts Medical Center, 800 Washington Street, Box 245, Boston, MA, 02111, USA.
| | | | | | | | | |
Collapse
|
13
|
Manevich Y, Reyes L, Britten CD, Townsend DM, Tew KD. Redox Signaling and Bioenergetics Influence Lung Cancer Cell Line Sensitivity to the Isoflavone ME-344. J Pharmacol Exp Ther 2016; 358:199-208. [PMID: 27255112 DOI: 10.1124/jpet.115.229344] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 05/26/2016] [Indexed: 02/02/2023] Open
Abstract
ME-344 [(3R,4S)-3,4-bis(4-hydroxyphenyl)-8-methyl-3,4-dihydro-2H-chromen-7-ol] is a second-generation derivative natural product isoflavone presently under clinical development. ME-344 effects were compared in lung cancer cell lines that are either intrinsically sensitive or resistant to the drug and in primary immortalized human lung embryonic fibroblasts (IHLEF). Cytotoxicity at low micromolar concentrations occurred only in sensitive cell lines, causing redox stress, decreased mitochondrial ATP production, and subsequent disruption of mitochondrial function. In a dose-dependent manner the drug caused instantaneous and pronounced inhibition of oxygen consumption rates (OCR) in drug-sensitive cells (quantitatively significantly less in drug-resistant cells). This was consistent with targeting of mitochondria by ME-344, with specific effects on the respiratory chain (resistance correlated with higher glycolytic indexes). OCR inhibition did not occur in primary IHLEF. ME-344 increased extracellular acidification rates in drug-resistant cells (significantly less in drug-sensitive cells), implying that ME-344 targets mitochondrial proton pumps. Only in drug-sensitive cells did ME-344 dose-dependently increase the intracellular generation of reactive oxygen species and cause oxidation of total (mainly glutathione) and protein thiols and the concomitant immediate increases in NADPH levels. We conclude that ME-344 causes complex, redox-specific, and mitochondria-targeted effects in lung cancer cells, which differ in extent from normal cells, correlate with drug sensitivity, and provide indications of a beneficial in vitro therapeutic index.
Collapse
Affiliation(s)
- Yefim Manevich
- Departments of Cell and Molecular Pharmacology and Experimental Therapeutics (Y.M., L.R., K.T.), Medicine (C.B.), and Drug Discovery and Biomedical Sciences (D.T.) of the Medical University of South Carolina, Charleston, South Carolina
| | - Leticia Reyes
- Departments of Cell and Molecular Pharmacology and Experimental Therapeutics (Y.M., L.R., K.T.), Medicine (C.B.), and Drug Discovery and Biomedical Sciences (D.T.) of the Medical University of South Carolina, Charleston, South Carolina
| | - Carolyn D Britten
- Departments of Cell and Molecular Pharmacology and Experimental Therapeutics (Y.M., L.R., K.T.), Medicine (C.B.), and Drug Discovery and Biomedical Sciences (D.T.) of the Medical University of South Carolina, Charleston, South Carolina
| | - Danyelle M Townsend
- Departments of Cell and Molecular Pharmacology and Experimental Therapeutics (Y.M., L.R., K.T.), Medicine (C.B.), and Drug Discovery and Biomedical Sciences (D.T.) of the Medical University of South Carolina, Charleston, South Carolina
| | - Kenneth D Tew
- Departments of Cell and Molecular Pharmacology and Experimental Therapeutics (Y.M., L.R., K.T.), Medicine (C.B.), and Drug Discovery and Biomedical Sciences (D.T.) of the Medical University of South Carolina, Charleston, South Carolina
| |
Collapse
|
14
|
Gong LH, Chen XX, Wang H, Jiang QW, Pan SS, Qiu JG, Mei XL, Xue YQ, Qin WM, Zheng FY, Shi Z, Yan XJ. Piperlongumine induces apoptosis and synergizes with cisplatin or paclitaxel in human ovarian cancer cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2014; 2014:906804. [PMID: 24895529 PMCID: PMC4034765 DOI: 10.1155/2014/906804] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 04/01/2014] [Accepted: 04/03/2014] [Indexed: 01/14/2023]
Abstract
Piperlongumine (PL), a natural alkaloid from Piper longum L., possesses the highly selective and effective anticancer property. However, the effect of PL on ovarian cancer cells is still unknown. In this study, we firstly demonstrate that PL selectively inhibited cell growth of human ovarian cancer cells. Furthermore, PL notably induced cell apoptosis, G2/M phase arrest, and accumulation of the intracellular reactive oxidative species (ROS) in a dose- and time-dependent manner. Pretreatment with antioxidant N-acety-L-cysteine could totally reverse the PL-induced ROS accumulation and cell apoptosis. In addition, low dose of PL/cisplatin or paclitaxel combination therapies had a synergistic antigrowth effect on human ovarian cancer cells. Collectively, our study provides new therapeutic potential of PL on human ovarian cancer.
Collapse
Affiliation(s)
- Li-Hua Gong
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical College, Shangcai Village South, Ouhai District, Wenzhou, Zhejiang 325000, China
| | - Xiu-Xiu Chen
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical College, Shangcai Village South, Ouhai District, Wenzhou, Zhejiang 325000, China
| | - Huan Wang
- Department of Gynecology, The Third Affiliated Hospital of Sun-Yat Sen University, Guangzhou, Guangdong 510632, China
| | - Qi-Wei Jiang
- Department of Cell Biology and Institute of Biomedicine, College of Life Science and Technology, Jinan University, Room 708, The 2nd Engineer and Scientific Building, 601 Huangpu RoadWest, Guangzhou, Guangdong 510632, China
| | - Shi-Shi Pan
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical College, Shangcai Village South, Ouhai District, Wenzhou, Zhejiang 325000, China
| | - Jian-Ge Qiu
- Department of Cell Biology and Institute of Biomedicine, College of Life Science and Technology, Jinan University, Room 708, The 2nd Engineer and Scientific Building, 601 Huangpu RoadWest, Guangzhou, Guangdong 510632, China
| | - Xiao-Long Mei
- Department of Cell Biology and Institute of Biomedicine, College of Life Science and Technology, Jinan University, Room 708, The 2nd Engineer and Scientific Building, 601 Huangpu RoadWest, Guangzhou, Guangdong 510632, China
| | - You-Qiu Xue
- Department of Cell Biology and Institute of Biomedicine, College of Life Science and Technology, Jinan University, Room 708, The 2nd Engineer and Scientific Building, 601 Huangpu RoadWest, Guangzhou, Guangdong 510632, China
| | - Wu-Ming Qin
- Department of Cell Biology and Institute of Biomedicine, College of Life Science and Technology, Jinan University, Room 708, The 2nd Engineer and Scientific Building, 601 Huangpu RoadWest, Guangzhou, Guangdong 510632, China
| | - Fei-Yun Zheng
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical College, Shangcai Village South, Ouhai District, Wenzhou, Zhejiang 325000, China
| | - Zhi Shi
- Department of Cell Biology and Institute of Biomedicine, College of Life Science and Technology, Jinan University, Room 708, The 2nd Engineer and Scientific Building, 601 Huangpu RoadWest, Guangzhou, Guangdong 510632, China
| | - Xiao-Jian Yan
- Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical College, Shangcai Village South, Ouhai District, Wenzhou, Zhejiang 325000, China
| |
Collapse
|
15
|
Shen M, Chan TH, Dou QP. Targeting tumor ubiquitin-proteasome pathway with polyphenols for chemosensitization. Anticancer Agents Med Chem 2014; 12:891-901. [PMID: 22292765 DOI: 10.2174/187152012802649978] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 12/21/2011] [Accepted: 12/21/2011] [Indexed: 11/22/2022]
Abstract
The development of tumor drug resistance is one of the biggest obstacles on the way to achieve a favorable outcome of chemotherapy. Among various strategies that have been explored to overcome drug resistance, the combination of current chemotherapy with plant polyphenols as a chemosensitizer has emerged as a promising one. Plant polyphenols are a group of phytochemicals characterized by the presence of more than one phenolic group. Mechanistic studies suggest that polyphenols have multiple intracellular targets, one of which is the proteasome complex. The proteasome is a proteolytic enzyme complex responsible for intracellular protein degradation and has been shown to play an important role in tumor growth and the development of drug resistance. Therefore, proteasome inhibition by plant polyphenols could be one of the mechanisms contributing to their chemosensitizing effect. Plant polyphenols that have been identified to possess proteasome-inhibitory activity include (-)-epigallocatechins-3-gallate (EGCG), genistein, luteolin, apigenin, chrysin, quercetin, curcumin and tannic acid. These polyphenols have exhibited an appreciable effect on overcoming resistance to various chemotherapeutic drugs as well as multidrug resistance in a broad spectrum of tumors ranging from carcinoma and sarcoma to hematological malignances. The in vitro and in vivo studies on polyphenols with proteasome-inhibitory activity have built a solid foundation to support the idea that they could serve as a chemosensitizer for the treatment of cancer. In-depth mechanistic studies and identification of optimal regimen are needed in order to eventually translate this laboratory concept into clinical trials to actually benefit current chemotherapy.
Collapse
Affiliation(s)
- Min Shen
- Karmanos Cancer Institute, Wayne State University, 540.1 HWCRC, 4100 John R Road, Detroit, MI 48201, USA
| | | | | |
Collapse
|
16
|
Fotopoulou C, Vergote I, Mainwaring P, Bidzinski M, Vermorken J, Ghamande S, Harnett P, Del Prete S, Green J, Spaczynski M, Blagden S, Gore M, Ledermann J, Kaye S, Gabra H. Weekly AUC2 carboplatin in acquired platinum-resistant ovarian cancer with or without oral phenoxodiol, a sensitizer of platinum cytotoxicity: the phase III OVATURE multicenter randomized study. Ann Oncol 2014; 25:160-5. [DOI: 10.1093/annonc/mdt515] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
|
17
|
Zhong YY, Chen HP, Tan BZ, Yu HH, Huang XS. Triptolide avoids cisplatin resistance and induces apoptosis via the reactive oxygen species/nuclear factor-κB pathway in SKOV3 PT platinum-resistant human ovarian cancer cells. Oncol Lett 2013; 6:1084-1092. [PMID: 24137468 PMCID: PMC3796418 DOI: 10.3892/ol.2013.1524] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Accepted: 07/10/2013] [Indexed: 01/15/2023] Open
Abstract
An acquired resistance to platinum-based drugs has emerged as a significant impediment to effective ovarian cancer therapy. The present study explored the anticancer mechanisms of triptolide (TPL) in SKOV3PT platinum-resistant human ovarian cancer cells and observed that TPL activated caspase 3 and induced the dose-dependent apoptosis of the SKOV3PT cells. Furthermore, TPL inhibited complex I of the mitochondrial respiratory chain (MRC) followed by an increase of reactive oxygen species (ROS), which further inhibited nuclear factor (NF)-κB activation and resulted in the downregulation of anti-apoptotic proteins, Bcl-2 and X-linked inhibitor of apoptosis protein (XIAP). Notably, the pre-treatment with N-acetyl-L-cysteine (NAC) abolished the TPL-induced ROS generation, NF-κB inhibition and cell apoptosis, but did not affect the inhibitory effect of TPL on complex I activity. These results suggested that TPL negatively regulated the NF-κB pathway through mitochondria-derived ROS accumulation, promoting the apoptosis of the SKOV3PT cells. Furthermore, TPL synergistically enhanced the cytotoxicity of cisplatin against platinum-resistant ovarian cancer cells. Collectively, these findings suggest that TPL is able to overcome chemoresistance and that it may be an effective treatment for platinum-resistant ovarian cancer, either alone or as an adjuvant therapy.
Collapse
Affiliation(s)
- Yan-Ying Zhong
- The Key Laboratory of Basic Pharmacology, School of Pharmaceutical Science, Nanchang University, Nanchang, Jiangxi 330006, P.R. China ; Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | | | | | | | | |
Collapse
|
18
|
Pant S, Burris HA, Moore K, Bendell JC, Kurkjian C, Jones SF, Moreno O, Kuhn JG, McMeekin S, Infante JR. A first-in-human dose-escalation study of ME-143, a second generation NADH oxidase inhibitor, in patients with advanced solid tumors. Invest New Drugs 2013; 32:87-93. [PMID: 23525756 PMCID: PMC3913846 DOI: 10.1007/s10637-013-9949-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Accepted: 03/07/2013] [Indexed: 12/22/2022]
Abstract
Background ME-143, a second-generation tumor-specific NADH oxidase inhibitor, is broadly active against human cancers in vitro and in vivo. This first-in-human dose-escalation study evaluated the dose-limiting toxicities (DLTs), pharmacokinetics, safety, tolerability, and preliminary anti-tumor activity of ME-143 in patients with advanced solid tumors. Methods Patients with advanced solid tumors were treated in a 3 + 3 escalation design. ME-143 was administered via intravenous infusion on days 1, 8, and 15 of the first 28-day cycle, and weekly thereafter; the final cohort received twice-weekly treatment. Samples for pharmacokinetic analysis were collected during cycle 1. Treatment continued until disease progression or unacceptable toxicity. Results Eighteen patients were treated: 2.5 mg/kg (n = 3); 5 mg/kg (n = 3); 10 mg/kg (n = 3); 20 mg/kg (n = 6); 20 mg/kg twice-weekly (n = 3). There were no DLTs observed. Nearly all treatment-related toxicities were grade 1/2, specifically (all grades) nausea (22 %) and fatigue (17 %). Two patients experienced infusion reactions at the 20 mg/kg dose level, one of which was grade 4. Stable disease was documented in three patients with colorectal cancer, cholangiocarcinoma, and anal cancer. Pharmacokinetic exposures were linear and dose-dependent, with a half-life of approximately 5 h. Conclusions ME-143 was well-tolerated when administered intravenously at the maximally administered/recommended phase 2 dose of 20 mg/kg once weekly to patients with advanced solid tumors. Though limited clinical activity was observed with monotherapy, inhibitors of tumor-specific NADH oxidase such as ME-143 may derive their greatest benefit in combination with cytotoxic chemotherapy.
Collapse
Affiliation(s)
- Shubham Pant
- SCRI, University of Oklahoma, Oklahoma City, OK, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
|
20
|
Yang YI, Lee KT, Park HJ, Kim TJ, Choi YS, Shih IM, Choi JH. Tectorigenin sensitizes paclitaxel-resistant human ovarian cancer cells through downregulation of the Akt and NFκB pathway. Carcinogenesis 2012; 33:2488-98. [PMID: 23027625 DOI: 10.1093/carcin/bgs302] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Paclitaxel (Taxol) is currently used as the front-line chemotherapeutic agent for several cancers including ovarian carcinoma; however, the drug frequently induces drug resistance through multiple mechanisms. The new strategy of using natural compounds in combination therapies is highly attractive because those compounds may enhance the efficacy of chemotherapy. In this study, we found that tectorigenin, an isoflavonoid isolated from flower of Pueraria thunbergiana, enhanced the growth-inhibitory effect of paclitaxel in paclitaxel-resistant ovarian cancer cells (MPSC1(TR), A2780(TR) and SKOV3(TR)) as well as their naive counterparts. The combination of tectorigenin with paclitaxel resulted in a synergistic apoptosis compared with either agent alone through activation of caspases-3, -8 and -9. Treatment with tectorigenin inhibited the nuclear translocation of NFκB and the expression of NFκB-dependent genes such as FLIP, XIAP, Bcl-2, Bcl-xL and COX-2, which are known to be associated with chemoresistance. In addition, the tectorigenin-paclitaxel combination inhibited the phosphorylation of IκB and IKK and the activation of Akt in paclitaxel-resistant cancer cells. Moreover, tectorigenin-paclitaxel-induced cell growth inhibition was enhanced by pretreatment with the Akt inhibitor LY294002 or overexpression of the dominant negative Akt (Akt-DN), but reduced by overexpression of constitutively activated Akt (Akt-Myr). Furthermore, we found that Akt-Myr, at least in part, reversed tectorigenin-paclitaxel-induced nuclear translocation of NFκB and the phosphorylation of IκB and IKK. These data suggest that tectorigenin could sensitize paclitaxel-resistant human ovarian cancer cells through inactivation of the Akt/IKK/IκB/NFκB signaling pathway, and promise a new intervention to chemosensitize paclitaxel-induced cytotoxicity in ovarian cancer.
Collapse
Affiliation(s)
- Yeong-In Yang
- Department of Life and Nanopharmaceutical Science, Kyung Hee University, Seoul 130-701, Republic of Korea
| | | | | | | | | | | | | |
Collapse
|
21
|
Mahoney S, Arfuso F, Rogers P, Hisheh S, Brown D, Millward M, Dharmarajan A. Cytotoxic effects of the novel isoflavone, phenoxodiol, on prostate cancer cell lines. J Biosci 2012; 37:73-84. [PMID: 22357205 DOI: 10.1007/s12038-011-9170-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Phenoxodiol is an isoflavone derivative that has been shown to elicit cytotoxic effects against a broad range of human cancers. We examined the effect of phenoxodiol on cell death pathways on the prostate cell lines LNCaP, DU145 and PC3, representative of different stages of prostate cancer, and its effects on cell death pathways in these cell lines. Cell proliferation assays demonstrated a significant reduction in the rate of cell proliferation after 48 h exposure to phenoxodiol (10 and 30 μM). FACS analysis and 3'-end labelling indicated that all three prostate cancer cell lines underwent substantial levels of cell death 48 h after treatment. Mitochondrial membrane depolarization, indicative of early-stage cell death signalling, using JC-1 detection, was also apparent in all cell lines after exposure to phenoxodiol in the absence of caspase-3 activation. Caspase inhibition assays indicated that phenoxodiol operates through a caspase-independent cell death pathway. These data demonstrate that phenoxodiol elicits anti-cancer effects in prostate cancer cell lines representative of early and later stages of development through an as-yet-unknown cell death mechanism. These data warrant the further investigation of phenoxodiol as a potential treatment for prostate cancer.
Collapse
Affiliation(s)
- Simon Mahoney
- School of Biomedical Sciences, Faculty of Health Sciences, Curtin University, Kent Street, Bentley, Western Australia, Australia
| | | | | | | | | | | | | |
Collapse
|
22
|
Yao C, Wu S, Li D, Ding H, Wang Z, Yang Y, Yan S, Gu Z. Co-administration phenoxodiol with doxorubicin synergistically inhibit the activity of sphingosine kinase-1 (SphK1), a potential oncogene of osteosarcoma, to suppress osteosarcoma cell growth both in vivo and in vitro. Mol Oncol 2012; 6:392-404. [PMID: 22583777 DOI: 10.1016/j.molonc.2012.04.002] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2012] [Revised: 04/23/2012] [Accepted: 04/27/2012] [Indexed: 12/25/2022] Open
Abstract
Elucidation of the mechanisms of chemo-resistance and implementation of strategies to overcome it will be pivotal to improve the survival for osteosarcoma (OS) patients. We here suggest that sphingosine kinase-1 (SphK1) might be the key factor contributing to chemo-resistance in OS. Our Western-blots and immunohistochemistry results showed that SphK1 is over-expressed in multiple clinical OS tissues. Over-expression of SphK1 in OS cell line U2OS promoted its growth and endorsed its resistance against doxorubicin, while knocking-down of SphK1 by shRNA inhibited U2OS cell growth and increased its sensitivity to doxorubicin. Co-administration phenoxodiol with doxorubicin synergistically inhibited SphK1 activity to trigger cellular ceramide accumulation, and achieved synergistic anti-OS growth effect, accompanied with a significant increased of apoptosis and cytotoxicity. Increased cellular level of ceramide by the co-administration induced the association between Akt and Protein Phosphatase 1 (PP1) to dephosphorylate Akt, and to introduce a constitutively active Akt (CA-Akt) restored Akt activation and diminished cell growth inhibition. Further, phenoxodiol and doxorubicin synergistically activated apoptosis signal-regulating kinase 1(ASK1)/c-jun-NH2-kinase (JNK) signaling, which also contributed to cell growth inhibition. Significantly, the role of SphK1 in OS cell growth and the synergistic anti-OS effect of phenoxodiol and doxorubicin were also seen in a mice OS xenograft model. In conclusion, our data suggest that SphK1 might be a critical oncogene of OS and co-administration phenoxodiol with doxorubicin synergistically inhibited the activity of SphK1 to suppress osteosarcoma cell growth both in vivo and in vitro.
Collapse
Affiliation(s)
- Chen Yao
- Department of Orthopedics, BenQ Medical Center, Nanjing Medical University, Nanjing, Jiangsu 210019, China
| | | | | | | | | | | | | | | |
Collapse
|
23
|
Tilley AJ, Zanatta SD, Qin CX, Kim IK, Seok YM, Stewart A, Woodman OL, Williams SJ. 2-Morpholinoisoflav-3-enes as flexible intermediates in the synthesis of phenoxodiol, isophenoxodiol, equol and analogues: vasorelaxant properties, estrogen receptor binding and Rho/RhoA kinase pathway inhibition. Bioorg Med Chem 2012; 20:2353-61. [PMID: 22377671 DOI: 10.1016/j.bmc.2012.02.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 01/26/2012] [Accepted: 02/02/2012] [Indexed: 12/17/2022]
Abstract
Isoflavone consumption correlates with reduced rates of cardiovascular disease. Epidemiological studies and clinical data provide evidence that isoflavone metabolites, such as the isoflavan equol, contribute to these beneficial effects. In this study we developed a new route to isoflavans and isoflavenes via 2-morpholinoisoflavenes derived from a condensation reaction of phenylacetaldehydes, salicylaldehydes and morpholine. We report the synthesis of the isoflavans equol and deoxygenated analogues, and the isoflavenes 7,4'-dihydroxyisoflav-3-ene (phenoxodiol, haganin E) and 7,4'-dihydroxyisoflav-2-ene (isophenoxodiol). Vascular pharmacology studies reveal that all oxygenated isoflavans and isoflavenes can attenuate phenylephrine-induced vasoconstriction, which was unaffected by the estrogen receptor antagonist ICI 182,780. Furthermore, the compounds inhibited U46619 (a thromboxane A(2) analogue) induced vasoconstriction in endothelium-denuded rat aortae, and reduced the formation of GTP RhoA, with the effects being greatest for equol and phenoxodiol. Ligand displacement studies of rat uterine cytosol estrogen receptor revealed the compounds to be generally weak binders. These data are consistent with the vasorelaxation activity of equol and phenoxodiol deriving at least in part by inhibition of the RhoA/Rho-kinase pathway, and along with the limited estrogen receptor affinity supports a role for equol and phenoxodiol as useful agents for maintaining cardiovascular function with limited estrogenic effects.
Collapse
Affiliation(s)
- Andrew J Tilley
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria, Australia
| | | | | | | | | | | | | | | |
Collapse
|
24
|
Yang YI, Kim JH, Lee KT, Choi JH. Costunolide induces apoptosis in platinum-resistant human ovarian cancer cells by generating reactive oxygen species. Gynecol Oncol 2011; 123:588-96. [PMID: 21945308 DOI: 10.1016/j.ygyno.2011.08.031] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 08/23/2011] [Accepted: 08/27/2011] [Indexed: 01/05/2023]
Abstract
OBJECTIVE The acquired resistance to platinum-based drugs has become an obstacle in the management of ovarian cancer. We investigated the apoptosis-inducing effect of costunolide, a natural sesquiterpene lactone, in platinum-resistant human ovarian cancer cells, along with the molecular mechanism of action. METHODS Costunolide and cisplatin were examined in platinum-resistant human ovarian cancer cells. MTT assay for cell viability, PI staining for cell cycle profiling, and Annexin V assay for apoptosis analysis. ROS production and protein expression was assessed by H(2)DCFDA staining and Western blotting, respectively. Combination effect was determined using the Combination Index (CI) method. RESULTS It was found that costunolide is more potent than cisplatin in inhibiting cell growth in three platinum-resistant ovarian cancer cell lines (MPSC1(PT), A2780(PT), and SKOV3(PT)). Costunolide induced apoptosis of platinum-resistant cells in a time- and dose-dependent manner and suppressed tumor growth in SKOV3(PT)-bearing mouse model. In addition, costunolide triggered the activation of caspase-3, -8, and -9. Pretreatment with caspase inhibitors neutralized the pro-apoptotic activity of costunolide. We further demonstrated that costunolide induced a significant increase in intracellular reactive oxygen species (ROS). Additionally, the antioxidant N-acetyl-L-cysteine (NAC) significantly attenuated the costunolide-induced production of ROS, activation of caspases, down-regulation of Bcl-2, and apoptosis in platinum-resistant ovarian cancer cells. Moreover, costunolide synergized with cisplatin to induce cell death in platinum-resistant ovarian cancer cells. CONCLUSIONS Taken together, these data suggest that costunolide, alone or in combination with cisplatin, may be of therapeutic potential in platinum-resistant ovarian cancer.
Collapse
Affiliation(s)
- Yeong-In Yang
- Department of Life & Nanopharmaceutical Science, Kyung Hee University, Seoul, Republic of Korea
| | | | | | | |
Collapse
|
25
|
Berényi E, Benko I, Vámosi G, Géresi K, Tárkányi I, Szegedi I, Lukács L, Juhász I, Kiss C, Fésüs L, Aradi J. In vitro and in vivo activity of 4-thio-uridylate against JY cells, a model for human acute lymphoid leukemia. Biochem Biophys Res Commun 2011; 410:682-7. [PMID: 21699885 DOI: 10.1016/j.bbrc.2011.06.056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Accepted: 06/07/2011] [Indexed: 12/11/2022]
Abstract
We have previously reported the in vitro anti-proliferative effect of 4-thio-uridylate (s(4)UMP) on OCM-1 uveal melanoma cells. Here, we assessed the efficacy of s(4)UMP on JY cells. Treatment of JY cells with s(4)UMP suppressed their colony forming activity and induced apoptosis; healthy human bone marrow granulocyte-macrophage progenitor cells were 14-fold less sensitive to the nucleotide. In vivo effectiveness of s(4)UMP was determined using xenograft SCID mouse model. s(4)UMP decreased the cell number and colony forming activity of the total cell content of the femur of SCID mice transplanted with JY cells without affecting the bone marrow of healthy mice. These results suggest that s(4)UMP alone or in combination with other clinically approved anti-leukemic remedies should be further explored as a potential novel therapeutic agent.
Collapse
Affiliation(s)
- Erika Berényi
- Department of Biochemistry and Molecular Biology, Medical and Health Science Center, University of Debrecen, 98 Nagyerdei Krt., Debrecen 4032, Hungary
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Miura K, Fujibuchi W, Ishida K, Naitoh T, Ogawa H, Ando T, Yazaki N, Watanabe K, Haneda S, Shibata C, Sasaki I. Inhibitor of apoptosis protein family as diagnostic markers and therapeutic targets of colorectal cancer. Surg Today 2011; 41:175-82. [PMID: 21264751 DOI: 10.1007/s00595-010-4390-1] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2010] [Accepted: 08/05/2010] [Indexed: 12/15/2022]
Abstract
The apoptosis and antiapoptotic signaling pathways are important for regulating carcinogenesis and cancer progression, and for determining prognosis. Molecules involved in apoptosis represent potential cancer diagnostic markers and therapeutic targets. The inhibitor of apoptosis protein (IAP) family includes several important molecules involved in apoptosis that might represent such targets. Increasing evidence has demonstrated that the IAP family of proteins is integral for antiapoptotic and nuclear factor-κB signal transduction, and enhanced expression of IAPs contributes to colon carcinogenesis and its poor prognosis, as well as to drug resistance of tumors. X-linked IAP, cIAP1, cIAP2, and survivin are prognostic markers of colorectal cancer, and survivin and cIAP2 are also utilized to predict the effect of anticancer treatment in colorectal cancer patients. Novel therapies such as YM155 and LY2181308 targeting survivin, AEG35156 and phenoxodiol targeting X-linked IAP, AT-406 as a Smac mimetic, and survivin peptides are currently being evaluated in clinical trials. This report reviews the involvement of the IAP family in colorectal adenocarcinoma in order to summarize the role of the IAP family members as diagnostic and therapeutic targets, and to provide an overview of the future course of research in this area.
Collapse
Affiliation(s)
- Koh Miura
- Department of Surgery, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Aguero MF, Venero M, Brown DM, Smulson ME, Espinoza LA. Phenoxodiol inhibits growth of metastatic prostate cancer cells. Prostate 2010; 70:1211-21. [PMID: 20564423 DOI: 10.1002/pros.21156] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
BACKGROUND Phenoxodiol, a synthetic analog of Genistein, is being assessed in several clinical studies against a range of cancer types and was shown to have a good efficacy and safety profile. In this study we tested the effects of Phenoxodiol against prostate cancer cell lines. METHODS Cell-cycle analysis, plasmatic membrane damage, clonogenic assay, comet assay, and Western blot methodologies were employed to assess the effects of Phenoxodiol on prostate cancer cell lines. An in vivo model confirmed the potential therapeutic efficacy of Phenoxodiol when administered orally to tumor bearing mice. RESULTS Phenoxodiol treatment promoted a marked inhibition of proliferation and loss of colony formation in LNCaP cells in a dose- and time-dependent manner. Similar effects were also observed in the metastatic prostate cell lines PC3 and DU145. Activation of poly(ADP ribose) polymerase 1 (PARP-1) clearly indicates the induction of DNA damage by Phenoxodiol. Oral administration of Phenoxodiol induced a considerable growth inhibition of malignant tumors generated by inoculation of LNCaP cells into Balb/c nu/nu athymic mice. CONCLUSIONS These data demonstrated that Phenoxodiol promotes apoptosis, as determined by PARP-1 degradation, via mitochondrial depolarization and G1/S cell-cycle arrest thereby confirming that it is active against androgen-dependent and independent prostate cancer cells. Although a precise target for Phenoxodiol has not been identified, these data contribute to our understanding of the mechanism by which this drug promotes cell death in prostate cancer cells, and warrants the continued clinical development of Phenoxodiol as a therapeutic for the treatment of metastatic prostate cancer.
Collapse
Affiliation(s)
- Martin F Aguero
- Department of Biochemistry and Molecular and Cellular Biology, Georgetown University Medical Center, Washington 20057, District of Columbia, USA
| | | | | | | | | |
Collapse
|
28
|
Phytochemicals in cancer prevention and therapy: truth or dare? Toxins (Basel) 2010; 2:517-51. [PMID: 22069598 PMCID: PMC3153217 DOI: 10.3390/toxins2040517] [Citation(s) in RCA: 122] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2010] [Revised: 03/10/2010] [Accepted: 03/10/2010] [Indexed: 12/25/2022] Open
Abstract
A voluminous literature suggests that an increase in consumption of fruit and vegetables is a relatively easy and practical strategy to reduce significantly the incidence of cancer. The beneficial effect is mostly associated with the presence of phytochemicals in the diet. This review focuses on a group of them, namely isothiocyanate, curcumin, genistein, epigallocatechin gallate, lycopene and resveratrol, largely studied as chemopreventive agents and with potential clinical applications. Cellular and animal studies suggest that these molecules induce apoptosis and arrest cell growth by pleiotropic mechanisms. The anticancer efficacy of these compounds may result from their use in monotherapy or in association with chemotherapeutic drugs. This latter approach may represent a new pharmacological strategy against several types of cancers. However, despite the promising results from experimental studies, only a limited number of clinical trials are ongoing to assess the therapeutic efficacy of these molecules. Nevertheless, the preliminary results are promising and raise solid foundations for future investigations.
Collapse
|
29
|
Pan L, Chai H, Kinghorn AD. The continuing search for antitumor agents from higher plants. PHYTOCHEMISTRY LETTERS 2010; 3:1-8. [PMID: 20228943 PMCID: PMC2836022 DOI: 10.1016/j.phytol.2009.11.005] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Plant secondary metabolites and their semi-synthetic derivatives continue to play an important role in anticancer drug therapy. In this short review, selected single chemical entity antineoplastic agents from higher plants that are currently in clinical trials as cancer chemotherapy drug candidates are described. These compounds are representative of a wide structural diversity. In addition, the approaches taken toward the discovery of anticancer agents from tropical plants in the laboratory of the authors are summarized. The successful clinical utilization of cancer chemotherapeutic agents from higher plants has been evident for about half a century, and, when considered with the promising pipeline of new plant-derived compounds now in clinical trials, this augurs well for the continuation of drug discovery research efforts to elucidate additional candidate substances of this type.
Collapse
Affiliation(s)
| | | | - A. Douglas Kinghorn
- Corresponding author. Tel.: +1-614-247-8094; Fax: +1-614-247-8642. (A. D. Kinghorn)
| |
Collapse
|
30
|
Miura K, Karasawa H, Sasaki I. cIAP2 as a therapeutic target in colorectal cancer and other malignancies. Expert Opin Ther Targets 2009; 13:1333-45. [PMID: 19793002 DOI: 10.1517/14728220903277256] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Colorectal cancer is one of the most common malignancies worldwide and 70% of tumors are resectable, but patients with metastatic diseases cannot be cured with current treatment modalities. Inhibition of the apoptotic pathway is one of the factors that may be responsible for carcinogenesis and drug resistance, and the inhibitor of apoptosis protein (IAP) family is thought to prevent apoptosis through inhibition of direct caspases and pro-caspases. Recently an increasing amount of evidence has been accumulated regarding cIAP2 and other IAP proteins of the antiapoptotic pathway and NF-kappaB signal transduction. IAPs are abnormally regulated and expressed in the majority of human malignancies at elevated levels. As a result, they have recently been reported to be therapeutic targets. The downregulation of cIAP2 efficiently enhances apoptosis through the activation of caspase 3/7 and 5-fluorouracil (5-FU) sensitivity in colorectal cancer cells exposed to 5-FU. This report reviews the evidence for cIAP2 and other IAP molecules as a therapeutic target for malignancies including colorectal cancer. So far, the information on colorectal cancer is limited; so this study includes other malignancies as well, in order to summarize the current knowledge of drug development targeting IAP molecules and provide an overview of the future course.
Collapse
Affiliation(s)
- Koh Miura
- Tohoku University Graduate School of Medicine, Department of Surgery, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8574, Japan.
| | | | | |
Collapse
|