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Beeraka NM, Zhang J, Mandal S, Vikram P. R. H, Liu J, B. M. N, Zhao D, Vishwanath P, B. M. G, Fan R. Screening fructosamine-3-kinase (FN3K) inhibitors, a deglycating enzyme of oncogenic Nrf2: Human FN3K homology modelling, docking and molecular dynamics simulations. PLoS One 2023; 18:e0283705. [PMID: 37910519 PMCID: PMC10619859 DOI: 10.1371/journal.pone.0283705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 03/14/2023] [Indexed: 11/03/2023] Open
Abstract
Fructosamine-3-kinase (FN3K) is involved in the deglycation of Nrf2, a significant regulator of oxidative stress in cancer cells. However, the intricate functional aspects of FN3K and Nrf2 in breast cancers have not been explored vividly. The objectives of this study are to design the human FN3K protein using homology modeling followed by the screening of several anticancer molecules and examining their efficacy to modulate FN3K activity, Nrf2-mediated antioxidant signalling. Methods pertinent to homology modeling, virtual screening, molecular docking, molecular dynamics simulations, assessment of ADME properties, cytotoxicity assays for anticancer molecules of natural/synthetic origin in breast cancer cells (BT-474, T-47D), and Western blotting were used in this study. The screened anticancer molecules including kinase inhibitors of natural and synthetic origin interacted with the 3-dimensional structure of the catalytic domain in human FN3K protein designed through homology modeling by significant CDOCKER interaction energies. Subsequently, gefitinib, sorafenib, neratinib, tamoxifen citrate, and cyclosporine A enhanced the expression of FN3K in BT-474 cell lines with simultaneous alteration in Nrf2-driven antioxidant signalling. Oxaliplatin significantly downregulated FN3K expression and modulated Nrf2-driven antioxidant signalling when compared to cisplatin and other anticancer drugs. Hence, the study concluded the potential implications of existing anticancer drugs to modulate FN3K activity in breast cancers.
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Affiliation(s)
- Narasimha M. Beeraka
- Cancer Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research (JSS AHER), Mysuru, Karnataka, India
- Department of Human Anatomy, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russian Federation
- Raghavendra Institute of Pharmaceutical Education and Research (RIPER), Anantapuramu, Chiyyedu, Andhra Pradesh, India
- Herman B. Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, United States of America
| | - Jin Zhang
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
| | - Subhankar Mandal
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research (JSS AHER), Mysuru, Karnataka, India
| | - Hemanth Vikram P. R.
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research (JSS AHER), Mysuru, Karnataka, India
| | - Junqi Liu
- Cancer Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Namitha B. M.
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research (JSS AHER), Mysuru, Karnataka, India
| | - Di Zhao
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Prashanth Vishwanath
- Department of Biochemistry, Center of Excellence in Molecular Biology and Regenerative Medicine, JSS Medical College, JSS Academy of Higher Education and Research, Mysore, India
| | - Gurupadayya B. M.
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research (JSS AHER), Mysuru, Karnataka, India
| | - Ruitai Fan
- Cancer Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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Beeraka NM, Zhang J, Zhao D, Liu J, A U C, Vikram Pr H, Shivaprakash P, Bannimath N, Manogaran P, Sinelnikov MY, Bannimath G, Fan R. Combinatorial Implications of Nrf2 Inhibitors with FN3K Inhibitor: In vitro Breast Cancer Study. Curr Pharm Des 2023; 29:2408-2425. [PMID: 37861038 DOI: 10.2174/0113816128261466231011114600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 08/07/2023] [Accepted: 08/14/2023] [Indexed: 10/21/2023]
Abstract
BACKGROUND Platinum derivatives are chemotherapeutic agents preferred for the treatment of cancers including breast cancer. Oxaliplatin is an anticancer drug that is in phase II studies to treat metastatic breast cancer. However, its usage is constrained by chemoresistance and dose-related side effects. OBJECTIVE The objective of this study is to examine the combinatorial efficacy of brusatol, an Nrf2 blocker, with oxaliplatin (a proven FN3K blocker in our study) in mitigating breast cancer growth in vitro. METHODS We performed cytotoxicity assays, combination index (CI) analysis, colony formation assays, apoptosis assays, and Western blotting. RESULTS Results of our study described the chemosensitizing efficacy of brusatol in combination with lowdose oxaliplatin against breast cancer through synergistic effects in both BT-474 and T47D cells. A significant mitigation in the migration rate of these cancer cells was observed with the combination regimen, which is equivalent to the IC-50 dose of oxaliplatin (125 μM). Furthermore, ROS-mediated and apoptotic modes of cell death were observed with a combinatorial regimen. Colony formation of breast cancer cell lines was mitigated with a combinatorial regimen of bursatol and oxaliplatin than the individual treatment regimen. FN3K expression downregulated with oxaliplatin in T47D cells. The mitigation of FN3K protein expression with a combination regimen was not observed but the Nrf2 downstream antioxidant signaling proteins were significantly downregulated with a combination regimen similar to individual drug regimens. CONCLUSION Our study concluded the combination efficacy of phytochemicals like brusatol in combination with low-dose oxaliplatin (FN3K blocker), which could enhance the chemosensitizing effect in breast cancer and minimize the overall dose requirement of oxaliplatin.
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Affiliation(s)
- Narasimha M Beeraka
- Cancer Center, The First Affiliated Hospital of Zhengzhou University, 1 Jianshedong Str., Zhengzhou 450052, China
- Sechenov First Moscow State Medical University, 8-2 Trubetskaya St., Moscow 119991, Russia
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research (JSS AHER), Mysuru, Karnataka, India
| | - Jin Zhang
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi 39216, USA
| | - Di Zhao
- Department of Endocrinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Junqi Liu
- Cancer Center, The First Affiliated Hospital of Zhengzhou University, 1 Jianshedong Str., Zhengzhou 450052, China
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou University, 1 Jianshedong Str., Zhengzhou 450052, China
| | - Chinnappa A U
- Department of Biochemistry, JSS Medical College, JSS Academy of Higher Education & Research (JSS AHER), Mysuru, Karnataka, India
| | - Hemanth Vikram Pr
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research (JSS AHER), Mysuru, Karnataka, India
- Xenone Healthcare Pvt. Ltd, #318, Third Floor, US Complex, Jasola, New Delhi 110076, India
| | - Priyanka Shivaprakash
- Faculty of Life Sciences, JSS Academy of Higher Education & Research (JSS AHER), Mysuru, Karnataka, India
| | - Namitha Bannimath
- Department of Pharmacology and Toxicology, JSS College of Pharmacy, JSS Academy of Higher Education & Research (JSS AHER), Mysuru, Karnataka, India
| | - Prasath Manogaran
- Department of Biotechnology, Bharathiar University, Coimbatore, Tamil Nadu 641046, India
| | - Mikhail Y Sinelnikov
- Sechenov First Moscow State Medical University, 8-2 Trubetskaya St., Moscow 119991, Russia
- Sinelab Biomedical Research Center, Minnesota 55905, USA
| | - Gurupadayya Bannimath
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education & Research (JSS AHER), Mysuru, Karnataka, India
| | - Ruitai Fan
- Cancer Center, The First Affiliated Hospital of Zhengzhou University, 1 Jianshedong Str., Zhengzhou 450052, China
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou University, 1 Jianshedong Str., Zhengzhou 450052, China
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Galassi R, Luciani L, Gambini V, Vincenzetti S, Lupidi G, Amici A, Marchini C, Wang J, Pucciarelli S. Multi-Targeted Anticancer Activity of Imidazolate Phosphane Gold(I) Compounds by Inhibition of DHFR and TrxR in Breast Cancer Cells. Front Chem 2021; 8:602845. [PMID: 33490036 PMCID: PMC7821381 DOI: 10.3389/fchem.2020.602845] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 12/09/2020] [Indexed: 12/09/2022] Open
Abstract
A class of phosphane gold(I) compounds, made of azoles and phosphane ligands, was evaluated for a screening on the regards of Breast Cancer cell panels (BC). The compounds possess N-Au-P or Cl-Au-P bonds around the central metal, and they differ for the presence of aprotic or protic polar groups in the azoles and/or the phosphane moieties to tune their hydrophilicity. Among the six candidates, only the compounds having the P-Au-N environment and not displaying neither the hydroxyl nor carboxyl groups in the ligands were found active. The compounds were screened by MTT tests in SKBR3, A17, and MDA-MB231 cancer cells, and two compounds (namely the 4,5-dicyano-imidazolate-1yl-gold(I)-(triphenylphosphane, 5, and 4,5-dichloro-imidazolate-1yl-gold(I)-triphenylphosphane, 6) were found very cytotoxic, with the most active with an IC50 value of 3.46 μM in MDA-MB231 cells. By performing enzymatic assays in the treated cells lysates, the residual enzymatic activity of dihydrofolate reductase (DHFR) has been measured after cell treatment for 4 or 12 h in comparison with control cells. Upon 12 h of treatment, the activity of DHFR was significantly reduced in both SKBR3 and A17 cells by compounds 5 and 6, but not in human MDA-MB231 cells; interestingly, it was found remarkably high after 4 h of treatment, revealing a time dependence for the DHFR enzymatic assays. The DHFR inhibition data have been compared to those for the thioredoxin reductase (TrxR), the most recognized molecular target for gold compounds. For this latter, similar residual activities (i.e., 37 and 49% for the match of SKBR3 cells and compound 5 or 6, respectively) were found. Binding studies on the regards of ct-DNA (calf-thymus-DNA) and of plasma transporters proteins, such as BSA (bovine serum albumin) and ATF (apo transferrin), were performed. As expected for gold compounds, the data support strong binding to proteins (Ksv values range: 1.51 ÷ 2.46 × 104 M−1) and a weaker interaction with ct-DNA's minor groove (Ksv values range: 1.55 ÷ 6.12 × 103 M−1).
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Affiliation(s)
- Rossana Galassi
- School of Science and Technology, University of Camerino, Camerino, Italy
| | - Lorenzo Luciani
- School of Science and Technology, University of Camerino, Camerino, Italy
| | - Valentina Gambini
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino, Italy
| | - Silvia Vincenzetti
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino, Italy
| | - Giulio Lupidi
- School of Drugs and Health Products Sciences, University of Camerino, Camerino, Italy
| | - Augusto Amici
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino, Italy
| | - Cristina Marchini
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino, Italy
| | - Junbiao Wang
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino, Italy
| | - Stefania Pucciarelli
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino, Italy
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Lang DK, Kaur R, Arora R, Saini B, Arora S. Nitrogen-Containing Heterocycles as Anticancer Agents: An Overview. Anticancer Agents Med Chem 2020; 20:2150-2168. [DOI: 10.2174/1871520620666200705214917] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 03/31/2020] [Accepted: 04/26/2020] [Indexed: 01/14/2023]
Abstract
Background:
Cancer is spreading all over the world, and it is becoming the leading cause of major
deaths. Today’s most difficult task for every researcher is to invent a new drug that can treat cancer with minimal
side effects. Many factors, including pollution, modern lifestyle and food habits, exposure to oncogenic
agents or radiations, enhanced industrialization, etc. can cause cancer. Treatment of cancer is done by various
methods that include chemotherapy, radiotherapy, surgery and immunotherapy in combination or singly along
with kinase inhibitors. Most of the anti-cancer drugs use the concept of kinase inhibition.
Objective:
The number of drugs being used in chemotherapy has heterocycles as their basic structure in spite of
various side effects. Medicinal chemists are focusing on nitrogen-containing heterocyclic compounds like pyrrole,
pyrrolidine, pyridine, imidazole, pyrimidines, pyrazole, indole, quinoline, oxadiazole, azole, benzimidazole,
etc. as the key building blocks to develop active biological compounds. The aim of this study is to attempt
to compile a dataset of nitrogen-containing heterocyclic anti-cancer drugs.
Methods:
We adopted a structural search on notorious journal publication websites and electronic databases
such as Bentham Science, Science Direct, PubMed, Scopus, USFDA, etc. for the collection of peer-reviewed
research and review articles for the present review. The quality papers were retrieved, studied, categorized into
different sections, analyzed and used for article writing.
Conclusion:
As per FDA databases, nitrogen-based heterocycles in the drug design are almost 60% of unique
small-molecule drugs. Some of the nitrogen-containing heterocyclic anti-cancer drugs are Axitinib, Bosutinib,
Cediranib, Dasatanib (Sprycel®), Erlotinib (Tarceva®), Gefitinib (Iressa®), Imatinib (Gleevec®), Lapatinib (Tykerb
®), Linifanib, Sorafenib (Nexavar®), Sunitinib (Sutent®), Tivozanib, etc. In the present review, we shall focus
on the overview of nitrogen-containing heterocyclic active compounds as anti-cancer agents.
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Affiliation(s)
| | - Rajwinder Kaur
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Rashmi Arora
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Balraj Saini
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | - Sandeep Arora
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
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Li X, Tian L, Zhang L, Xu B, Zhang Y, Li Q. Clinical Significance of ZNF711 in Human Breast Cancer. Onco Targets Ther 2020; 13:6593-6601. [PMID: 32753895 PMCID: PMC7351981 DOI: 10.2147/ott.s251702] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 05/28/2020] [Indexed: 01/31/2023] Open
Abstract
Purpose To investigate the clinicopathologic and prognostic significance of the zinc-finger protein 711 (ZNF711) in breast cancer (BCa). Materials and Methods The relevance of ZNF711 in BCa was analyzed using bioinformatics. The expression of ZNF711 was detected by immunohistochemistry in paraffin blocks of BCa. To evaluate its clinical significance, the correlation between the expression of ZNF711 and BCa clinical indicators, including estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor-2 (HER-2), was analyzed. Finally, the Kaplan-Meier method was applied to explore the prognostic value of ZNF711. Results ZNF711 expression was decreased in BCa and was negatively correlated with ER expression (P < 0.05) and positively correlated with HER-2 expression (P < 0.01), but there was no significant correlation between ZNF711 and PR expression. ZNF711 expression was not correlated with age, tumor diameter, or lymph node metastasis; however, ZNF711 expression was correlated with staging in BCa. Survival analysis results showed that the ZNF711-positive group patients had a poorer prognosis compared with the ZNF711-negative group. Conclusion The expression of ZNF711 was deceased in BCa and closely related to ER and HER-2 expression. Therefore, ZNF711 could not only serve as a predictor of BCa with poor prognosis but also as a potential biomarker for targeted therapy.
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Affiliation(s)
- Xiaoyan Li
- Department of Pathology, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning 110042, People's Republic of China
| | - Liu Tian
- Psychiatry and Mental Health Center, Shenyang Mental Health Center, Shenyang, Liaoning 110168, People's Republic of China
| | - Lina Zhang
- Department of Pathology, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning 110042, People's Republic of China
| | - Baojin Xu
- Departments of Breast Surgery, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning 110042, People's Republic of China
| | - Yong Zhang
- Department of Pathology, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning 110042, People's Republic of China
| | - Qiang Li
- Department of Pathology, Cancer Hospital of China Medical University, Liaoning Cancer Hospital and Institute, Shenyang, Liaoning 110042, People's Republic of China
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Lim WQ, Phua SZF, Zhao Y. Redox-Responsive Polymeric Nanocomplex for Delivery of Cytotoxic Protein and Chemotherapeutics. ACS APPLIED MATERIALS & INTERFACES 2019; 11:31638-31648. [PMID: 31389684 DOI: 10.1021/acsami.9b09605] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Responsive delivery of anticancer proteins into cells is an emerging field in biological therapeutics. Currently, the delivery of proteins is highly compromised by multiple successive physiological barriers that reduce the therapeutic efficacy. Hence, there is a need to design a robust and sustainable nanocarrier to provide suitable protection of proteins and overcome the physiological barriers for better cellular accumulation. In this work, polyethylenimine (PEI) cross-linked by oxaliplatin(IV) prodrug (oxliPt(IV)) was used to fabricate a redox-responsive nanocomplex (PEI-oxliPt(IV)@RNBC/GOD) for the delivery of a reactive oxygen species-cleavable, reversibly caged RNase A protein (i.e., RNase A nitrophenylboronic conjugate, RNBC) and glucose oxidase (GOD) in order to realize efficient cancer treatment. The generation of hydrogen peroxide by GOD can uncage and restore the enzymatic activity of RNBC. On account of the responsiveness of the nanocomplex to highly reducing cellular environment, it would dissociate and release the protein and active oxaliplatin drug, causing cell death by both catalyzing RNA degradation and inhibiting DNA synthesis. As assessed by the RNA degradation assay, the activity of the encapsulated RNBC was recovered by the catalytic production of hydrogen peroxide from GOD and glucose substrate overexpressed in cancer cells. Monitoring of the changes in nanoparticle size confirmed that the nanocomplex could dissociate in the reducing environment, with the release of active oxaliplatin drug and protein. Confocal laser scanning microscopy (CLSM) and flow cytometry analysis revealed highly efficient accumulation of the nanocomplex as compared to free native proteins. In vitro cytotoxicity experiments using 4T1 cancer cells showed ∼80% cell killing efficacy, with highly efficient apoptosis induction. Assisted by the cationic polymeric carrier, it was evident from CLSM images that intracellular delivery of the therapeutic protein significantly depleted the RNA level. Thus, this work provides a promising platform for the delivery of therapeutic proteins and chemotherapeutic drugs for efficient cancer treatment.
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Affiliation(s)
- Wei Qi Lim
- NTU-Northwestern Institute for Nanomedicine, Interdisciplinary Graduate School , Nanyang Technological University , 50 Nanyang Drive , 637553 , Singapore
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , 637371 , Singapore
| | - Soo Zeng Fiona Phua
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , 637371 , Singapore
| | - Yanli Zhao
- NTU-Northwestern Institute for Nanomedicine, Interdisciplinary Graduate School , Nanyang Technological University , 50 Nanyang Drive , 637553 , Singapore
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , 637371 , Singapore
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Savić A, Marzo T, Scaletti F, Massai L, Bartoli G, Hoogenboom R, Messori L, Van Deun R, Van Hecke K. New platinum(II) and palladium(II) complexes with substituted terpyridine ligands: synthesis and characterization, cytotoxicity and reactivity towards biomolecules. Biometals 2018; 32:33-47. [PMID: 30367340 DOI: 10.1007/s10534-018-0155-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 10/16/2018] [Indexed: 11/29/2022]
Abstract
A series of palladium(II) (1-3) and platinum(II) chloride complexes (4 and 5) with 2,2':6',2″-terpyridine (terpy) derivatives substituted at the 4' position, was synthesized and fully characterized. Single crystal X-ray diffraction analysis of complexes 2, 3 and 5 showed tridentate coordination of the 4'-substituted terpyridine (terpy) ligands to the metal center. Moreover, in vitro cytotoxic activity of these complexes toward a panel of human cancer cell lines (lung cancer A549, colorectal cancer HCT116, ovarian cancer IGROV-1) and toward normal cell line HDF (dermal fibroblast) was determined by Trypan Blue exclusion assay. Overall, the tested compounds manifested a relevant cytotoxicity for the selected cancer cell lines with complex 4 also showing a modest cytotoxicity on the normal cell lines. To better understand the mode of action of these metal complexes, their reactivity with three model proteins, i.e. hen egg white lysozyme (HEWL), cytochrome c (cyt c) and ribonuclease A (RNase A) were comparatively investigated through ESI-MS analysis. The results highlighted a different behavior between the two series of complexes being platinum compounds more reactive toward RNase and cyt c than palladium compounds. Based on the obtained results, it is proposed that in presence of RNase A and cyt c, the platinum complexes undergo activation through release of labile ligands followed by binding to the protein. In contrast, palladium complexes revealed a far lower reactivity implying the likely occurrence of a different mechanism of action.
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Affiliation(s)
- Aleksandar Savić
- Faculty of Chemistry, University of Belgrade, Belgrade, 11000, Serbia.
| | - Tiziano Marzo
- Department of Chemsitry, University of Florence, 50019, Sesto Fiorentino, Italy.,Department of Chemistry and Industrial Chemistry, University of Pisa, 56124, Pisa, Italy
| | - Federica Scaletti
- Department of Chemsitry, University of Florence, 50019, Sesto Fiorentino, Italy
| | - Lara Massai
- Department of Chemsitry, University of Florence, 50019, Sesto Fiorentino, Italy
| | - Gianluca Bartoli
- Department of Experimental and Clinical Medicine, University of Florence, 50134, Florence, Italy
| | - Richard Hoogenboom
- Department of Organic and Macromolecular Chemistry, Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Ghent University, 9000, Ghent, Belgium
| | - Luigi Messori
- Department of Chemsitry, University of Florence, 50019, Sesto Fiorentino, Italy
| | - Rik Van Deun
- Department of Chemistry, L³-Luminescent Lanthanide Lab, Ghent University, 9000, Ghent, Belgium.
| | - Kristof Van Hecke
- Department of Chemistry, XStruct, Ghent University, 9000, Ghent, Belgium
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Oral Administration of Clinical Stage Drug Candidate SENS-401 Effectively Reduces Cisplatin-induced Hearing Loss in Rats. Otol Neurotol 2018; 38:1355-1361. [PMID: 28796092 DOI: 10.1097/mao.0000000000001546] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
HYPOTHESIS SENS-401, an oral clinical-stage drug, may reduce cisplatin-induced hearing loss and cochlear damage in an in vivo model. BACKGROUND Cisplatin is commonly associated with hearing loss, causing significant learning and behavioral difficulties in the pediatric cancer population, and for which there are currently no clinical solutions. SENS-401 has previously been shown to improve acoustic trauma-induced hearing loss in vivo. METHODS The effect of SENS-401 (R-azasetron besylate) on cisplatin IC50 values was evaluated in a panel of cisplatin-sensitive cell lines (NIH:OVCAR-3, SK-N-AS, NCI-H460, FaDu). Auditory brainstem response and distortion product otoacoustic emission tests were performed in a rat model of cisplatin-induced hearing-loss (8 mg/kg, day 1) at baseline, and after 14 days of SENS-401 (6.6, 13.2, 26.4 mg/kg/d). Cochlear outer hair cells were counted after immunolabeling for myosin-VIIa. RESULTS Cisplatin cytotoxicity was not impacted by the addition of SENS-401 (up to 10 μM) in any of the cell types evaluated. In vivo, all SENS-401 doses significantly improved auditory brainstem response threshold shift (up to 30 dB) and distortion product otoacoustic emission amplitude loss (up to 19 dB) over placebo. Body weight and survival were not significantly different between rats receiving placebo and those receiving 26.4 mg/kg SENS-401. Significantly more surviving outer hair cells were present after SENS-401 treatment compared with placebo (p < 0.001), with up to 11-fold more in the basal turn of the cochlea. CONCLUSION In vivo and in vitro data support the otoprotective potential and tolerability of SENS-401 without impacting chemotherapeutic potential. Oral SENS-401 is a promising candidate for treating cisplatin-induced ototoxicity.
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Gao Y, Liu Z, Ding Z, Hou S, Li J, Jiang K. MicroRNA-155 increases colon cancer chemoresistance to cisplatin by targeting forkhead box O3. Oncol Lett 2018; 15:4781-4788. [PMID: 29552117 PMCID: PMC5840649 DOI: 10.3892/ol.2018.7976] [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: 11/08/2016] [Accepted: 11/23/2017] [Indexed: 12/27/2022] Open
Abstract
To investigate the effect of microRNA (miR)-155 on colon cancer chemoresistance to cisplatine and its mechanism. Reverse transcription quantitative polymerase chain reaction was used to measure the levels of miR-155 and forkhead box O3 (FOXO3) in colon cancer specimens and cell lines. Overexpression of miR-155 and miR-155 inhibitor were transfected into colon cancer cell lines to investigate its role of chemoresistance to cisplatin in colon cancer. MTS assays were used to analyse cell viability in vitro. In vivo tumor formation assays were performed in C57BL/6 wild type and miR-155 knockout mice (miR-155-/-). A luciferase reporter assay was used to measure the translation of FOXO3. Additionally, the expression of FOXO3 was detected by western blot analysis. It was identified that miR-155 was markedly upregulated in colon cancer tissue and cell lines. Overexpression of miR-155 enhanced colon cancer cell chemoresistance to cisplatin in vitro and tumorigenesis in vivo. In addition, overexpression of miR-155 was associated with decreased levels of FOXO3, primarily through inhibiting the expression of FOXO3 to increase colon cancer resistanec to cisplatin. The present study demonstrated that miR-155 increased colon cancer drug resistance and decreased FOXO3 expression in vivo and in vitro. This may provide a novel method for the treatment of drug-resistant colon cancer.
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Affiliation(s)
- Yuewen Gao
- Department of General Surgery, The People's Hospital of Rizhao City, Rizhao, Shandong 276800, P.R. China
| | - Zhaoyan Liu
- Department of General Surgery, The People's Hospital of Rizhao City, Rizhao, Shandong 276800, P.R. China
| | - Zhaohong Ding
- Department of General Surgery, The People's Hospital of Rizhao City, Rizhao, Shandong 276800, P.R. China
| | - Shicai Hou
- Department of General Surgery, The People's Hospital of Rizhao City, Rizhao, Shandong 276800, P.R. China
| | - Jun Li
- Department of General Surgery, The People's Hospital of Rizhao City, Rizhao, Shandong 276800, P.R. China
| | - Kehua Jiang
- Department of Urology, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, Hubei 445000, P.R. China
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Cassandri M, Smirnov A, Novelli F, Pitolli C, Agostini M, Malewicz M, Melino G, Raschellà G. Zinc-finger proteins in health and disease. Cell Death Discov 2017; 3:17071. [PMID: 29152378 PMCID: PMC5683310 DOI: 10.1038/cddiscovery.2017.71] [Citation(s) in RCA: 407] [Impact Index Per Article: 58.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 08/28/2017] [Accepted: 08/29/2017] [Indexed: 02/07/2023] Open
Abstract
Zinc-finger proteins (ZNFs) are one of the most abundant groups of proteins and have a wide range of molecular functions. Given the wide variety of zinc-finger domains, ZNFs are able to interact with DNA, RNA, PAR (poly-ADP-ribose) and other proteins. Thus, ZNFs are involved in the regulation of several cellular processes. In fact, ZNFs are implicated in transcriptional regulation, ubiquitin-mediated protein degradation, signal transduction, actin targeting, DNA repair, cell migration, and numerous other processes. The aim of this review is to provide a comprehensive summary of the current state of knowledge of this class of proteins. Firstly, we describe the actual classification of ZNFs, their structure and functions. Secondly, we focus on the biological role of ZNFs in the development of organisms under normal physiological and pathological conditions.
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Affiliation(s)
- Matteo Cassandri
- Department of Experimental Medicine and Surgery, University of Rome 'Tor Vergata', Rome 00133, Italy
| | - Artem Smirnov
- Department of Experimental Medicine and Surgery, University of Rome 'Tor Vergata', Rome 00133, Italy
| | - Flavia Novelli
- Department of Experimental Medicine and Surgery, University of Rome 'Tor Vergata', Rome 00133, Italy
| | - Consuelo Pitolli
- Department of Experimental Medicine and Surgery, University of Rome 'Tor Vergata', Rome 00133, Italy
| | - Massimiliano Agostini
- Department of Experimental Medicine and Surgery, University of Rome 'Tor Vergata', Rome 00133, Italy
| | - Michal Malewicz
- Medical Research Council, Toxicology Unit, Leicester University, Leicester LE1 9HN, UK
| | - Gerry Melino
- Department of Experimental Medicine and Surgery, University of Rome 'Tor Vergata', Rome 00133, Italy.,Medical Research Council, Toxicology Unit, Leicester University, Leicester LE1 9HN, UK
| | - Giuseppe Raschellà
- ENEA Research Center Casaccia, Laboratory of Biosafety and Risk Assessment, Via Anguillarese, Rome, Italy
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11
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Redondo-Blanco S, Fernández J, Gutiérrez-Del-Río I, Villar CJ, Lombó F. New Insights toward Colorectal Cancer Chemotherapy Using Natural Bioactive Compounds. Front Pharmacol 2017; 8:109. [PMID: 28352231 PMCID: PMC5348533 DOI: 10.3389/fphar.2017.00109] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 02/22/2017] [Indexed: 12/12/2022] Open
Abstract
Combination therapy consists in the simultaneous administration of a conventional chemotherapy drug (or sometimes, a radiotherapy protocol) together with one or more natural bioactives (usually from plant or fungal origin) of small molecular weight. This combination of anticancer drugs may be applied to cell cultures of tumor cells, or to an animal model for a cancer type (or its xenograft), or to a clinical trial in patients. In this review, we summarize current knowledge describing diverse synergistic effects on colorectal cancer cell cultures, animal models, and clinical trials of various natural bioactives (stilbenes, flavonoids, terpenes, curcumin, and other structural families), which may be important with respect to diminish final doses of the chemotherapy drug, although maintaining its biological effect. This is important as these approaches may help reduce side effects in patients under conventional chemotherapy. Also, these molecules may exerts their synergistic effects via different cell cycle pathways, including different ones to those responsible of resistance phenotypes: transcription factors, membrane receptors, adhesion and structural molecules, cell cycle regulatory components, and apoptosis pathways.
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Affiliation(s)
- Saúl Redondo-Blanco
- Departamento de Biología Funcional, Área de Microbiología, Facultad de Medicina, Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Universidad de Oviedo Oviedo, Spain
| | - Javier Fernández
- Departamento de Biología Funcional, Área de Microbiología, Facultad de Medicina, Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Universidad de Oviedo Oviedo, Spain
| | - Ignacio Gutiérrez-Del-Río
- Departamento de Biología Funcional, Área de Microbiología, Facultad de Medicina, Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Universidad de Oviedo Oviedo, Spain
| | - Claudio J Villar
- Departamento de Biología Funcional, Área de Microbiología, Facultad de Medicina, Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Universidad de Oviedo Oviedo, Spain
| | - Felipe Lombó
- Departamento de Biología Funcional, Área de Microbiología, Facultad de Medicina, Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Universidad de Oviedo Oviedo, Spain
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12
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Otto C, Spivak G, Aloisi CMN, Menigatti M, Naegeli H, Hanawalt PC, Tanasova M, Sturla SJ. Modulation of Cytotoxicity by Transcription-Coupled Nucleotide Excision Repair Is Independent of the Requirement for Bioactivation of Acylfulvene. Chem Res Toxicol 2017; 30:769-776. [PMID: 28076683 DOI: 10.1021/acs.chemrestox.6b00240] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Bioactivation as well as DNA repair affects the susceptibility of cancer cells to the action of DNA-alkylating chemotherapeutic drugs. However, information is limited with regard to the relative contributions of these processes to the biological outcome of metabolically activated DNA alkylating agents. We evaluated the influence of cellular bioactivation capacity and DNA repair on cytotoxicity of the DNA alkylating agent acylfulvene (AF). We compared the cytotoxicity and RNA synthesis inhibition by AF and its synthetic activated analogue iso-M0 in a panel of fibroblast cell lines with deficiencies in transcription-coupled (TC-NER) or global genome nucleotide excision repair (GG-NER). We related these data to the inherent bioactivation capacity of each cell type on the basis of mRNA levels. We demonstrated that specific inactivation of TC-NER by siRNA had the largest positive impact on AF activity in a cancer cell line. These findings establish that transcription-coupled DNA repair reduces cellular sensitivity to AF, independent of the requirement for bioactivation.
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Affiliation(s)
- Claudia Otto
- Department of Health Sciences and Technology, ETH Zurich , 8092 Zurich, Switzerland
| | - Graciela Spivak
- Department of Biology, Stanford University , Stanford, California 94305, United States
| | - Claudia M N Aloisi
- Department of Health Sciences and Technology, ETH Zurich , 8092 Zurich, Switzerland
| | - Mirco Menigatti
- Institute of Molecular Cancer Research, University of Zurich , 8057 Zurich, Switzerland
| | - Hanspeter Naegeli
- Institute of Pharmacology and Toxicology, University of Zurich-Vetsuisse , 8057 Zurich, Switzerland
| | - Philip C Hanawalt
- Department of Biology, Stanford University , Stanford, California 94305, United States
| | - Marina Tanasova
- Department of Health Sciences and Technology, ETH Zurich , 8092 Zurich, Switzerland.,Department of Chemistry, Michigan Technological University , Houghton, Michigan 49932, United States
| | - Shana J Sturla
- Department of Health Sciences and Technology, ETH Zurich , 8092 Zurich, Switzerland
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13
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Salimi M, Abdi K, Kandelous HM, Hadadzadeh H, Azadmanesh K, Amanzadeh A, Sanati H. Antiproliferative effects of copper(II)-polypyridyl complexes in breast cancer cells through inducing apoptosis. Biometals 2015; 28:267-78. [PMID: 25673217 DOI: 10.1007/s10534-015-9820-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 01/02/2015] [Indexed: 11/29/2022]
Abstract
Although cisplatin has been used for decades to treat human cancer, some toxic side effects and resistance are observed. Previous investigations have suggested copper complexes as a novel class of tumor-cell apoptosis inducers. The present study aimed to evaluate the anti-breast cancer activities of two polypyridyl-based copper(II) complexes, [Cu(tpy)(dppz)](NO3)2 (1) and [Cu(tptz)2](NO3)2 (2) (tpy = 2,2':6',2″-terpyridine, dppz = dipyrido[3,2-a:2',3'-c]phenazine, tptz = 2,4,6-tris(2-pyridyl)-1,3,5-triazine), using human breast adenocarcinoma cell line (MCF-7). The ability of the complexes to cleave supercoiled DNA in the presence and absence of external agents was also examined. The apoptotic activities of the complexes were assessed using flow cytometry, fluorescence microscope and western blotting analysis. Our results indicated the high DNA affinity and nuclease activity of complexes 1 and 2. The cleavage mechanisms between the complexes and plasmid DNA are likely to involve a singlet oxygen or singlet oxygen-like entity as the reactive oxygen species. Complexes 1 and 2 also significantly inhibited the proliferation of MCF-7 cells in a dose-dependent manner (IC50 values = 4.57 and 1.98 μM at 24 h, respectively). Complex 2 remarkably induced MCF-7 cells to undergo apoptosis, which was demonstrated by cell morphology, annexin-V and propidium iodide staining. The caspase cascade was activated as shown by the proteolytic cleavage of caspase-3 after treatment of MCF-7 cells with complex 2. Additionally, complex 2 significantly increased the expression of the Bax-to-Bcl-2 ratio to induce apoptosis. In conclusion, these results revealed that complex 2 may be a potential and promising chemotherapeutic agent to treat breast cancer.
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Affiliation(s)
- Mona Salimi
- Department of Physiology and Pharmacology, Pasteur Institute of Iran, P.O. Box 13164, 3159915111, Tehran, Iran,
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14
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Bioactive metabolites from macrofungi: ethnopharmacology, biological activities and chemistry. FUNGAL DIVERS 2013. [DOI: 10.1007/s13225-013-0265-2] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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15
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Byun JM, Jeong DH, Lee DS, Kim JR, Park SG, Kang MS, Kim YN, Lee KB, Sung MS, Kim KT. Tetraarsenic oxide and cisplatin induce apoptotic synergism in cervical cancer. Oncol Rep 2013; 29:1540-6. [PMID: 23338680 DOI: 10.3892/or.2013.2243] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Accepted: 12/14/2012] [Indexed: 11/06/2022] Open
Abstract
Tetraarsenic oxide (As4O6, TAO) is a new arsenic compound that inhibits cell growth and induces apoptosis in human cervical cancer cell lines. In the present study, we report that the growth of tumor cells (CaSki) was inhibited by treatment with TAO alone or in combination with cisplatin or paclitaxel in vitro and in vivo. Proliferation was assessed by WST-1 assay, and apoptosis was assessed by Annexin-V/PI FACS analysis in the CaSki cell line treated with a single agent or with the combinations of two agents. Expression of apoptosis-related proteins was analyzed by western blot analysis. A mouse xenograft model using CaSki cells was used to determine the in vivo activity of tetraarsenic oxide alone and in combination with cisplatin or paclitaxel by estimation of tumor size. At the end of the experiment, tumor tissue from each mouse was removed and processed for TUNEL analysis for confirmation of apoptotic cells. TAO was able to inhibit cell proliferation in a time- and dose-dependent manner. A combination of TAO and cisplatin effectively induced apoptosis by activating caspase-3. Using a mouse xenograft model, the sizes of tumors which were treated with a single agent and with a combination of agents decreased in a time-dependent manner. A combination of TAO and cisplatin resulted in a significantly reduced tumor size (P<0.05). The data for the histochemical staining of TUNEL-positive cells showed that the number of apoptotic cells was significantly increased by the combination of TAO and cisplatin. Thus, TAO is a good candidate for use in a combined regimen with cisplatin for patients with cervical cancer.
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Affiliation(s)
- Jung Mi Byun
- Department of Obstetrics and Gynecology, Busan Paik Hospital, Inje University, Busan 614-735, Republic of Korea
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16
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Tanasova M, Sturla SJ. Chemistry and biology of acylfulvenes: sesquiterpene-derived antitumor agents. Chem Rev 2012; 112:3578-610. [PMID: 22482429 DOI: 10.1021/cr2001367] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marina Tanasova
- ETH Zurich, Institute of Food, Nutrition and Health, Zurich, Switzerland
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17
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Liu LY, Zhang L, Feng T, Li ZH, Dong ZJ, Li XY, Su J, Li Y, Liu JK. Unusual illudin-type sesquiterpenoids from cultures of Agrocybe salicacola. NATURAL PRODUCTS AND BIOPROSPECTING 2011; 1:87-92. [PMCID: PMC4131650 DOI: 10.1007/s13659-011-0018-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Accepted: 10/26/2011] [Indexed: 06/01/2023]
Abstract
Seven new illudin-type sesquiterpenoids, agrocybins A–G (1–7), along with three known analogues (8–10), have been isolated from the culture broth of the fungus Agrocybe salicacola. Their structures were elucidated on the basis of extensive spectroscopic data analysis and comparison with data reported in the literature. The relative stereoconfigurations of 1 and 6 were elucidated by the X-ray crystallographic diffraction analysis. Compound 1 was highly cyclized containing seven chiral carbons which arranged compactly in six rings. ![]()
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Affiliation(s)
- Liang-Yan Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
- Graduate University of Chinese Academy of Sciences, Beijing, 100039 China
| | - Ling Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Tao Feng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Zheng-Hui Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Ze-Jun Dong
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Xing-Yao Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
- Graduate University of Chinese Academy of Sciences, Beijing, 100039 China
| | - Jia Su
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
- Graduate University of Chinese Academy of Sciences, Beijing, 100039 China
| | - Yan Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
| | - Ji-Kai Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 China
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18
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Lovejoy KS, Serova M, Bieche I, Emami S, D'Incalci M, Broggini M, Erba E, Gespach C, Cvitkovic E, Faivre S, Raymond E, Lippard SJ. Spectrum of cellular responses to pyriplatin, a monofunctional cationic antineoplastic platinum(II) compound, in human cancer cells. Mol Cancer Ther 2011; 10:1709-19. [PMID: 21750216 DOI: 10.1158/1535-7163.mct-11-0250] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Pyriplatin, cis-diammine(pyridine)chloroplatinum(II), a platinum-based antitumor drug candidate, is a cationic compound with anticancer properties in mice and is a substrate for organic cation transporters that facilitate oxaliplatin uptake. Unlike cisplatin and oxaliplatin, which form DNA cross-links, pyriplatin binds DNA in a monofunctional manner. The antiproliferative effects of pyriplatin, alone and in combination with known anticancer drugs (paclitaxel, gemcitabine, SN38, cisplatin, and 5-fluorouracil), were evaluated in a panel of epithelial cancer cell lines, with direct comparison to cisplatin and oxaliplatin. The effects of pyriplatin on gene expression and platinum-DNA adduct formation were also investigated. Pyriplatin exhibited cytotoxic effects against human cell lines after 24 hours (IC(50) = 171-443 μmol/L), with maximum cytotoxicity in HOP-62 non-small cell lung cancer cells after 72 hours (IC(50) = 24 μmol/L). Pyriplatin caused a G(2)-M cell cycle block similar to that induced by cisplatin and oxaliplatin. Induction of apoptotsis and DNA damage response was supported by Annexin-V analysis and detection of phosphorylated Chk2 and H2AX. Treatment with pyriplatin increased CDKN1/p21 and decreased ERCC1 mRNA expression. On a platinum-per-nucleotide basis, pyriplatin-DNA adducts are less cytotoxic than those of cisplatin and oxaliplatin. The mRNA levels of genes implicated in drug transport and DNA damage repair, including GSTP1 and MSH2, correlate with pyriplatin cellular activity in the panel of cell lines. Synergy occurred for combinations of pyriplatin with paclitaxel. Because its spectrum of activity differs significantly from those of cisplatin or oxaliplatin, pyriplatin is a lead compound for developing novel drug candidates with cytotoxicity profiles unlike those of drugs currently in use.
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Affiliation(s)
- Katherine S Lovejoy
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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19
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Taylor-Harding B, Orsulic S, Karlan BY, Li AJ. Fluvastatin and cisplatin demonstrate synergistic cytotoxicity in epithelial ovarian cancer cells. Gynecol Oncol 2010; 119:549-56. [DOI: 10.1016/j.ygyno.2010.08.017] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Revised: 08/07/2010] [Accepted: 08/16/2010] [Indexed: 11/17/2022]
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20
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Schilder RJ, Blessing JA, Shahin MS, Miller DS, Tewari KS, Muller CY, Warshal DP, McMeekin S, Rotmensch J. A Phase 2 Evaluation of Irofulven as Second-line Treatment of Recurrent or Persistent Intermediately Platinum-Sensitive Ovarian or Primary Peritoneal Cancer. Int J Gynecol Cancer 2010; 20:1137-41. [DOI: 10.1111/igc.0b013e3181e8df36] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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21
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Zhang CZY, Chen GG, Lai PBS. Transcription factor ZBP-89 in cancer growth and apoptosis. Biochim Biophys Acta Rev Cancer 2010; 1806:36-41. [PMID: 20230874 DOI: 10.1016/j.bbcan.2010.03.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2009] [Revised: 02/25/2010] [Accepted: 03/08/2010] [Indexed: 11/30/2022]
Abstract
ZBP-89, a Krüppel-type zinc-finger transcription factor that binds to GC-rich sequences, is involved in the regulation of cell growth and cell death. It maps to chromosome 3q21 and is composed of 794 residues. Having bifunctional regulatory domains, ZBP-89 may function as a transcriptional activator or repressor of variety of genes such as p16 and vimentin. ZBP-89 arrests cell proliferation through its interactions with p53 and p21(waf1). It is able to stabilize p53 through directly binding and enhance p53 transcriptional activity by retaining it in the nucleus. In addition, ZBP-89 potentiates in butyrate-induced endogenous p21(waf1) up-regulation. ZBP-89 is usually over-expressed in human cancer cells, where it can efficiently induce apoptosis through p53-dependent and -independent mechanisms. Moreover, ZBP-89 is capable of enhancing killing effects of several anti-cancer drugs. Therefore, ZBP-89 may be served as a potential target in cancer therapy.
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Affiliation(s)
- Chris Z Y Zhang
- Department of Surgery, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, N.T., Hong Kong
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22
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Siegel DS, Piizzi G, Piersanti G, Movassaghi M. Enantioselective total synthesis of (-)-acylfulvene and (-)-irofulven. J Org Chem 2009; 74:9292-304. [PMID: 19938810 PMCID: PMC2805080 DOI: 10.1021/jo901926z] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We report our full account of the enantioselective total synthesis of (-)-acylfulvene (1) and (-)-irofulven (2), which features metathesis reactions for the rapid assembly of the molecular framework of these antitumor agents. We discuss (1) the application of an Evans Cu-catalyzed aldol addition reaction using a strained cyclopropyl ketenethioacetal, (2) an efficient enyne ring-closing metathesis cascade reaction in a challenging setting, (3) the reagent IPNBSH for a late-stage reductive allylic transposition reaction, and (4) the final RCM/dehydrogenation sequence for the formation of (-)-acylfulvene (1) and (-)-irofulven (2).
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Affiliation(s)
- Dustin S Siegel
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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23
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Zhang N, Wu ZM, McGowan E, Shi J, Hong ZB, Ding CW, Xia P, Di W. Arsenic trioxide and cisplatin synergism increase cytotoxicity in human ovarian cancer cells: therapeutic potential for ovarian cancer. Cancer Sci 2009; 100:2459-64. [PMID: 19769630 PMCID: PMC11159866 DOI: 10.1111/j.1349-7006.2009.01340.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Drug resistance is a major concern in the successful treatment of ovarian cancer. In the present study we report a combinational drug regime using arsenic trioxide (ATO) and cisplatin (CDDP) to increase therapeutic potentiality in ovarian cancer cells. ATO-mediated growth inhibition and apoptosis in human suspension ovarian cancer COC1 cells were evaluated by MTT assay and annexin V assay using flow cytometry, respectively. cDNA arrays were performed to screen ATO-mediated gene expression. Treatment of COC1 cells with ATO alone resulted in growth inhibition and apoptosis with a dose-and time-dependent fashion; further cDNA arrays showed that 34 genes (23 up-regulated genes and 11 down-regulated genes) may strongly associate with the antiproliferative and pro-apoptotic effects induced by ATO. Furthermore, Chou-Talalay analysis was used to evaluate the combinational effect of ATO and CDDP as well as dose-reduction index (DRI) in a panel of ovarian cancer cells including CDDP-sensitive and -resistant cell lines. The combination index (CI) analysis indicated that the interaction effect of ATO/CDDP exhibited a wide range of synergism in all the adherent ovarian cancer cells (A2780, IGROV-1, SKOV-3, and R182) as well as 0.93 to 0.69 for IC(50) to IC(90) in suspension COC1 cells where CI < 1, =1, and >1, define synergism, additive effect, and antagonism, respectively. More intriguingly, the combination of ATO and CDDP yielded favorable DRIs ranging from 1.23-fold to 13.51-fold dose reduction. These results suggest that ATO and its combination with CDDP present therapeutic potential for ovarian cancer, and deserve further preclinical and clinical studies.
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Affiliation(s)
- Ning Zhang
- Department of Obstetrics and Gynecology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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24
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Affiliation(s)
- Mats Ljungman
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, University of Michigan Comprehensive Cancer Center, Ann Arbor, Michigan 48109, USA.
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25
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Chen GG, Chan UPF, Bai LC, Fung KY, Tessier A, To AKY, Merchant JL, Lai PBS. ZBP-89 reduces the cell death threshold in hepatocellular carcinoma cells by increasing caspase-6 and S phase cell cycle arrest. Cancer Lett 2009; 283:52-8. [PMID: 19362768 DOI: 10.1016/j.canlet.2009.03.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2009] [Revised: 03/15/2009] [Accepted: 03/16/2009] [Indexed: 12/01/2022]
Abstract
ZBP-89 inhibits the some tumor cells but its role in HCC is unknown. We investigated effect of ZBP-89 on cell death of 5 HCC cell lines with different status of p53. We found that ZBP-89 significantly induced cell death of all HCC cells particularly those with wild-type p53. The inhibition was well correlated with the induction of caspase-6 activity. The inhibition of caspase-6 abolished the effect of ZBP-89. ZBP-89 reduced the cells in G2-M but increased them in S phase. With the changes in caspase-6 and cell cycle, ZBP-89 greatly enhanced the killing effectiveness of 5-fluorouracil or staurosporine in HCC cells.
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Affiliation(s)
- George G Chen
- Department of Surgery, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong.
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26
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Zhang N, Zhang H, Xia L, Zheng Y, Yu Y, Zhu Y, Chen G, Di W. NSC606985 induces apoptosis, exerts synergistic effects with cisplatin, and inhibits hypoxia-stabilized HIF-1alpha protein in human ovarian cancer cells. Cancer Lett 2009; 278:139-144. [PMID: 19339107 DOI: 10.1016/j.canlet.2008.12.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2008] [Revised: 12/15/2008] [Accepted: 12/16/2008] [Indexed: 11/19/2022]
Abstract
The camptothecins, which target the intranuclear enzyme topoisomerase I, have advanced to the forefront of several areas of developmental chemotherapy of cancers. In the present study, we investigated the potential anti-human ovarian cancer effects of NSC606985, a novel and rarely studied camptothecin analog, and its combination with cisplatin (CDDP). Human ovarian cancer cell line COC1 cells were treated with different nanomolar of NSC606985 with or without CDDP, and cell growth and apoptosis were evaluated, respectively, by MTT assay and annexin-V assay on flow cytometry. Chou-Talalay analysis was used to evaluate combined effect of NSC606985 and CDDP. Western blot was used to detect protein kinase Cdelta (PKCdelta), caspase-3 and hypoxia-inducible factor-1alpha (HIF-1alpha) proteins. Our results showed that NSC606985 at nanomolar concentration induced apoptosis with the activation of PKCdelta in COC1 cells. Especially, NSC606985 presented the significant combined effects on COC1 cells in terms of growth inhibition and apoptosis induction. In addition, NSC606985 significantly antagonized the accumulation of HIF-1alpha stabilized by hypoxia or hypoxia-mimetic agent. These results suggest that NSC606985 and its combination with CDDP present the therapeutic potential on ovarian cancer, and deserve further preclinical and clinical studies.
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Affiliation(s)
- Ning Zhang
- Dept. of Obstetrics and Gynecology, Institute of Obstetrics and Gynecology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200001, China
| | - Hanwen Zhang
- Dept. of Obstetrics and Gynecology, Institute of Obstetrics and Gynecology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200001, China
| | - Li Xia
- Dept. of Pathophysiology, Key Laboratory of Cell Differentiation and Apoptosis of National Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Ying Zheng
- Dept. of Pathophysiology, Key Laboratory of Cell Differentiation and Apoptosis of National Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Yun Yu
- Dept. of Pathophysiology, Key Laboratory of Cell Differentiation and Apoptosis of National Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Yuanshan Zhu
- Dept. of Medicine/Endocrinology, Weill Medical College of Cornell University, New York, NY, 10021, USA
| | - Guoqiang Chen
- Dept. of Pathophysiology, Key Laboratory of Cell Differentiation and Apoptosis of National Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
| | - Wen Di
- Dept. of Obstetrics and Gynecology, Institute of Obstetrics and Gynecology, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200001, China.
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27
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Hongrapipat J, Kopecková P, Liu J, Prakongpan S, Kopecek J. Combination chemotherapy and photodynamic therapy with fab' fragment targeted HPMA copolymer conjugates in human ovarian carcinoma cells. Mol Pharm 2008; 5:696-709. [PMID: 18729468 PMCID: PMC2646875 DOI: 10.1021/mp800006e] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
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The biological activities of sequential combinations of anticancer drugs, SOS thiophene (SOS) and mesochlorin e6 monoethylenediamine (Mce6), in the form of free drugs, nontargeted N-(2-hydroxypropyl)methacrylamide (HPMA) copolymer−drug conjugates, P-GFLG-Mce6 and P-GFLG-SOS (P is the HPMA copolymer backbone and GFLG is the glycylphenylalanylleucylglycine spacer), and Fab′-targeted HPMA copolymer−drug conjugates, P-(GFLG-Mce6)-Fab′ and P-(GFLG-SOS)-Fab′ (Fab′ from OV-TL16 antibodies complementary to CD47), were evaluated against human ovarian carcinoma OVCAR-3 cells. Mce6, SOS, P-GFLG-Mce6, P-GFLG-SOS, P-(GFLG-Mce6)-Fab′, and P-(GFLG-SOS)-Fab′, when used as single agents or in binary combination, exhibited cytotoxic activities against OVCAR-3 cells, as determined using a modified MTT assay. The binding and internalization of P-(GFLG-Mce6)-Fab′ and P-(GFLG-SOS)-Fab′ by OVCAR-3 cells were visualized by confocal microscopy and flow cytometry. The results confirmed an enhanced biorecognition by OVCAR-3 cells of Fab′-targeted HPMA copolymer conjugates over nontargeted conjugates. The median-effect analysis and the determination of the combination index (CI) were used to describe the drug interaction and quantify the synergism, antagonism, or additivity in anticancer effects. The sequential combinations of SOS+Mce6 and P-GFLG-SOS+P-GFLG-Mce6 displayed very strong synergism to synergism in the entire range of cell inhibition levels (fa = 0.5 − 0.95). The P-(GFLG-SOS)-Fab′+P-(GFLG-Mce6)-Fab′ exhibited a strong synergism for fa values up to about 0.85, but showed synergistic effect and nearly additive effect at fa = 0.9 and 0.95, respectively. These observations support the continuation of in vivo investigations of these conjugates for the treatment of ovarian cancer.
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Affiliation(s)
- Jarunee Hongrapipat
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
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28
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Kelner MJ, McMorris TC, Rojas RJ, Estes LA, Suthipinijtham P. Synergy of Irofulven in combination with various anti-metabolites, enzyme inhibitors, and miscellaneous agents in MV522 lung carcinoma cells: marked interaction with gemcitabine and 5-fluorouracil. Invest New Drugs 2008; 26:407-15. [PMID: 18227973 DOI: 10.1007/s10637-008-9113-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2007] [Accepted: 01/09/2008] [Indexed: 11/24/2022]
Abstract
The novel agent Irofulven (HMAF, NSC 683863) has demonstrated significant antitumor activity against solid tumors in various xenograft models and human clinical trials. The antitumor potential of combining irofulven with 72 different anti-metabolite, enzyme inhibiting, and miscellaneous agents was investigated in this study. The human lung carcinoma MV522 cell line and its corresponding xenograft model were used to evaluate the activity of irofulven in combination with these different agents. Irofulven in combination with select anti-metabolites, notably cytidine or adenine-derived agents, displayed strong synergistic activity in both in vitro and in vivo studies. Agents demonstrating strong synergistic interaction with irofulven included gemcitabine, cyclocytidine, cytarabine, fludarabine phosphate, cladribine, and 5-fluorouracil. Other anti-metabolites, enzyme inhibitors, and a variety of miscellaneous agents failed to interact beneficially when administered in combination with irofulven. The therapeutic activity of irofulven is enhanced considerably when irofulven is combined with select anti-metabolite agents, and further clinical evaluation of these combinations is warranted. The synergistic interaction with these combinations may stem from a variety of actions including inhibition of the nucleotide excision repair (NER) pathway, topoisomerase I activity, and caspase-dependent and independent induction of apoptosis.
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Affiliation(s)
- Michael J Kelner
- Department of Pathology, University of California, San Diego, USA.
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29
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Spillane CB, Fletcher NC, Rountree SM, van den Berg H, Chanduloy S, Morgan JL, Keene FR. Benzothiazole bipyridine complexes of ruthenium(II) with cytotoxic activity. J Biol Inorg Chem 2007; 12:797-807. [PMID: 17530304 DOI: 10.1007/s00775-007-0232-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2006] [Accepted: 03/22/2007] [Indexed: 12/01/2022]
Abstract
A series of benzothiazole-substituted trisbipyridine ruthenium(II) analogues {[Ru(bpy)(2)(4,5'-bbtb)](2+), [Ru(bpy)(2)(5,5'-bbtb)](2+) and [Ru(bpy)(2)(5-mbtb)](2+) [bpy is 2,2'-bipyridine, bbtb is bis(benzothiazol-2-yl)-2,2'-bipyridine, 5-mbtb is 5-(benzothiazol-2-yl),5'-methyl-2,2'-bipyridine]} have been prepared and compared with the complex [Ru(bpy)(2)(4,4'-bbtb)](2+) reported previously. From the UV-vis spectral studies, substitution at the 5-position of the bpy causes the ligand-centred transitions to occur at considerably lower energy than for those with the functionality at the 4-position, while at the same time causing the emission to be effectively quenched. However, substitution at the 4-position causes the metal-to-ligand charge transfer to occur at lower energies. Fluorescent intercalator displacement studies indicate that the doubly substituted complexes displace ethidium bromide from a range of oligonucleotides, with the greater preference shown for bulge and hairpin sequences by the Lambda enantiomer. Since the complexes only show small variation in the UV-vis spectra on the introduction of calf thymus DNA and a small increase in fluorescence they do not appear to be intercalators, but appear to associate within one of the grooves. All of the reported bisbenzothiazole complexes show reasonable cytotoxicity against a range of human cancer cell lines.
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Affiliation(s)
- Caitriona B Spillane
- School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Belfast, UK
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30
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Gong J, Vaidyanathan VG, Yu X, Kensler TW, Peterson LA, Sturla SJ. Depurinating acylfulvene-DNA adducts: characterizing cellular chemical reactions of a selective antitumor agent. J Am Chem Soc 2007; 129:2101-11. [PMID: 17256933 DOI: 10.1021/ja0665951] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Acylfulvenes (AFs) are a class of semisynthetic agents with high toxicity toward certain tumor cells, and for one analogue, hydroxymethylacylfulvene (HMAF), clinical trials are in progress. DNA alkylation by AFs, mediated by bioreductive activation, is believed to contribute to cytotoxicity, but the structures and chemical properties of corresponding DNA adducts are unknown. This study provides the first structural characterization of AF-specific DNA adducts. In the presence of a reductive enzyme, alkenal/one oxidoreductase (AOR), AF selectively alkylates dAdo and dGuo in reactions with a monomeric nucleoside, as well as in reactions with naked or cellular DNA, with 3-alkyl-dAdo as the apparently most abundant AF-DNA adduct. Characterization of this adduct was facilitated by independent chemical synthesis of the corresponding 3-alkyl-Ade adduct. In addition, in naked or cellular DNA, evidence was obtained for the formation of an additional type of adduct resulting from direct conjugate addition of Ade to AF followed by hydrolytic cyclopropane ring-opening, indicating the potential for a competing reaction pathway involving direct DNA alkylation. The major AF-dAdo and AF-dGuo adducts are unstable under physiologically relevant conditions and depurinate to release an alkylated nucleobase in a process that has a half-life of 8.5 h for 3-alkyladenine and less than approximately 2 h for dGuo adducts. DNA alkylation further leads to single-stranded DNA cleavage, occurring exclusively at dGuo and dAdo sites, in a nonsequence-specific manner. In AF-treated cells that were transfected with either AOR or control vectors, the DNA adducts identified match those from in vitro studies. Moreover, a positive correlation was observed between DNA adduct levels and cell sensitivity to AF. The potential contributing roles of AOR-mediated bioactivation and adduct stability to the cytotoxicity of AF are discussed.
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Affiliation(s)
- Jiachang Gong
- Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota 55455, USA
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31
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Wang Y, Wiltshire T, Senft J, Reed E, Wang W. Irofulven induces replication-dependent CHK2 activation related to p53 status. Biochem Pharmacol 2006; 73:469-80. [PMID: 17118344 PMCID: PMC1800887 DOI: 10.1016/j.bcp.2006.10.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2006] [Revised: 10/11/2006] [Accepted: 10/18/2006] [Indexed: 11/25/2022]
Abstract
CHK2 and p53 are frequently mutated in human cancers. CHK2 is known to phosphorylate and stabilize p53. CHK2 has also been implicated in DNA repair and apoptosis induction. However, whether p53 affects CHK2 activation and whether CHK2 activation modulates chemosensitivity are unclear. In this study, we found that in response to the DNA damage agent, irofulven, CHK2 activation, rather than its expression, is inversely correlated to p53 status. Irofulven inhibits DNA replication and induces chromosome aberrations (breaks and radials) and p53-dependent cell cycle arrest. Pretreatment of cells with the DNA polymerase inhibitor, aphidicolin, resulted in reduction of irofulven-induced CHK2 activation and foci formation, indicating that CHK2 activation by irofulven is replication-dependent. Furthermore, by using ovarian cancer cell lines expressing dominant-negative CHK2 and CHK2-knockout HCT116 cells, we found that CHK2 activation contributes to the control of S and G2/M cell cycle arrests, but not chemosensitivity to irofulven. Overall, this study demonstrates that in response to irofulven-induced DNA damage, the activation of CHK2 is dependent on DNA replication and related to p53 status. By controlling cell cycle arrest and DNA replication, p53 affects CHK2 activation. CHK2 activation contributes to cell cycle arrest, but not chemosensitivity.
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Affiliation(s)
- Yutian Wang
- Mary Babb Randolph Cancer Center; West Virginia University School of Medicine, Morgantown, WV 26506
| | - Timothy Wiltshire
- Department of Microbiology, Immunology and Cell Biology; West Virginia University School of Medicine, Morgantown, WV 26506
| | - Jamie Senft
- Mary Babb Randolph Cancer Center; West Virginia University School of Medicine, Morgantown, WV 26506
| | - Eddie Reed
- Mary Babb Randolph Cancer Center; West Virginia University School of Medicine, Morgantown, WV 26506
- Department of Microbiology, Immunology and Cell Biology; West Virginia University School of Medicine, Morgantown, WV 26506
| | - Weixin Wang
- Mary Babb Randolph Cancer Center; West Virginia University School of Medicine, Morgantown, WV 26506
- Department of Microbiology, Immunology and Cell Biology; West Virginia University School of Medicine, Morgantown, WV 26506
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32
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Movassaghi M, Piizzi G, Siegel DS, Piersanti G. Enantioselective Total Synthesis of (−)-Acylfulvene and (−)-Irofulven. Angew Chem Int Ed Engl 2006; 45:5859-63. [PMID: 16888819 DOI: 10.1002/anie.200602011] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mohammad Movassaghi
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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33
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Movassaghi M, Piizzi G, Siegel DS, Piersanti G. Enantioselective Total Synthesis of (−)-Acylfulvene and (−)-Irofulven. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200602011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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