1
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Sharma N, Setiawan D, Hamelberg D, Narayan R, Aneja R. Computational benchmarking of putative KIFC1 inhibitors. Med Res Rev 2023; 43:293-318. [PMID: 36104980 DOI: 10.1002/med.21926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 08/06/2022] [Accepted: 08/17/2022] [Indexed: 02/05/2023]
Abstract
The centrosome in animal cells is instrumental in spindle pole formation, nucleation, proper alignment of microtubules during cell division, and distribution of chromosomes in each daughter cell. Centrosome amplification involving structural and numerical abnormalities in the centrosome can cause chromosomal instability and dysregulation of the cell cycle, leading to cancer development and metastasis. However, disturbances caused by centrosome amplification can also limit cancer cell survival by activating mitotic checkpoints and promoting mitotic catastrophe. As a smart escape, cancer cells cluster their surplus of centrosomes into pseudo-bipolar spindles and progress through the cell cycle. This phenomenon, known as centrosome clustering (CC), involves many proteins and has garnered considerable attention as a specific cancer cell-targeting weapon. The kinesin-14 motor protein KIFC1 is a minus end-directed motor protein that is involved in CC. Because KIFC1 is upregulated in various cancers and modulates oncogenic signaling cascades, it has emerged as a potential chemotherapeutic target. Many molecules have been identified as KIFC1 inhibitors because of their centrosome declustering activity in cancer cells. Despite the ever-increasing literature in this field, there have been few efforts to review the progress. The current review aims to collate and present an in-depth analysis of known KIFC1 inhibitors and their biological activities. Additionally, we present computational docking data of putative KIFC1 inhibitors with their binding sites and binding affinities. This first-of-kind comparative analysis involving experimental biology, chemistry, and computational docking of different KIFC1 inhibitors may help guide decision-making in the selection and design of potent inhibitors.
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Affiliation(s)
- Nivya Sharma
- Department of Biology, Georgia State University, Atlanta, Georgia, USA
| | - Dani Setiawan
- Department of Chemistry, Georgia State University, Atlanta, Georgia, USA
| | - Donald Hamelberg
- Department of Chemistry, Georgia State University, Atlanta, Georgia, USA
| | - Rishikesh Narayan
- School of Chemical and Materials Sciences, Indian Institute of Technology Goa, Goa, India.,School of Interdisciplinary Life Sciences, Indian Institute of Technology Goa, Goa, India
| | - Ritu Aneja
- Department of Biology, Georgia State University, Atlanta, Georgia, USA.,Department of Clinical and Diagnostic Sciences, School of Health Professions, University of Alabama at Birmingham, Birmingham, AL, USA
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2
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PARP Inhibitor Inhibits the Vasculogenic Mimicry through a NF-κB-PTX3 Axis Signaling in Breast Cancer Cells. Int J Mol Sci 2022; 23:ijms232416171. [PMID: 36555812 PMCID: PMC9785325 DOI: 10.3390/ijms232416171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 12/04/2022] [Accepted: 12/09/2022] [Indexed: 12/23/2022] Open
Abstract
Poly (ADP-ribose) polymerase inhibitors (PARPi) are targeted therapies that inhibit PARP proteins which are involved in a variety of cell functions. PARPi may act as modulators of angiogenesis; however, the relationship between PARPi and the vasculogenic mimicry (VM) in breast cancer remains unclear. To determine whether PARPi regulate the vascular channel formation, we assessed whether the treatment with olaparib, talazoparib and veliparib inhibits the vascular channel formation by breast cancer cell lines. Here, we found that PARPi act as potent inhibitors of the VM formation in triple negative breast cancer cells, independently of the BRCA status. Mechanistically, we find that PARPi trigger and inhibit the NF-κB signaling, leading to the inhibition of the VM. We further show that PARPi decrease the expression of the angiogenic factor PTX3. Moreover, PTX3 rescued the PARPi-inhibited VM inhibition. In conclusion, our results indicate that PARPi, by targeting the VM, may provide a new therapeutic approach for triple negative breast cancer.
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3
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Murai T, Xing Y, Kurokawa M, Kuribayashi T, Nikaido M, Elboray EE, Hamada S, Kobayashi Y, Sasamori T, Kawabata T, Furuta T. One-Pot Preparation of ( NH)-Phenanthridinones and Amide-Functionalized [7]Helicene-like Molecules from Biaryl Dicarboxylic Acids. J Org Chem 2022; 87:5510-5521. [PMID: 35394787 DOI: 10.1021/acs.joc.1c02769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A one-pot transformation of biaryl dicarboxylic acids to (NH)-phenanthridinone derivatives based on a Curtius rearrangement and subsequent basic hydrolysis was developed. This method is also applicable for the preparation of optically active amide-functionalized [7]helicene-like molecules. Furthermore, aza[5]helicene derivatives with a phosphate moiety were isolated as a product of the Curtius rearrangement step in the case of substrates that bear chalcogen atoms. The stereostructures of these products, revealed by X-ray diffraction analysis, suggested that chalcogen-bonding and pnictogen-bonding interactions might contribute to their stabilization. The configurational stability of the helicene-like molecules and their chiroptical properties were further investigated.
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Affiliation(s)
- Takuya Murai
- Department of Pharmaceutical Chemistry, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8414, Japan
| | - Yongning Xing
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Mayu Kurokawa
- Department of Pharmaceutical Chemistry, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8414, Japan
| | | | - Masanori Nikaido
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Elghareeb E Elboray
- Department of Pharmaceutical Chemistry, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8414, Japan.,Chemistry Department, Faculty of Science, South Valley University, Qena 83523, Egypt
| | - Shohei Hamada
- Department of Pharmaceutical Chemistry, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8414, Japan
| | - Yusuke Kobayashi
- Department of Pharmaceutical Chemistry, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8414, Japan
| | - Takahiro Sasamori
- Faculty of Pure and Applied Sciences, University of Tsukuba, Tenodai 1-1-1, Tsukuba, Ibaraki 307-8571, Japan
| | - Takeo Kawabata
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Takumi Furuta
- Department of Pharmaceutical Chemistry, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8414, Japan
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4
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Cohen-Armon M. Exclusive modifications of NuMA in malignant epithelial cells: A potential therapeutic mechanism. Drug Discov Today 2022; 27:1205-1209. [PMID: 35143964 DOI: 10.1016/j.drudis.2022.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 12/13/2021] [Accepted: 02/03/2022] [Indexed: 11/03/2022]
Abstract
NuMA (nuclear mitotic apparatus) protein is indispensable in the mitosis of human proliferating cells, both malignant and benign. The progression of mitosis requires stable spindles, which depend on the bipolar clustering of NuMA within the spindles. The phenanthridine PJ34 kills malignant epithelial cells during mitosis and targets NuMA. PJ34 exclusively blocks the post-translational modification of NuMA in a variety of malignant epithelial cells, but not in benign cells. This blockage of the post-translational modification of NuMA affects its protein-binding capacity and causes construction faults in the mitotic spindle poles of PJ34-treated cancer cells, leading to mitotic catastrophe cell death. PJ34 is a potent PARP1 inhibitor, so its cytotoxicity in human malignant cells is exclusively independent of PARP, challenging the currently accepted notion that inhibition of PARP1 halts cancer by preventing DNA repair. Certain molecules that act as PARP1 inhibitors target other proteins and vital mechanisms in human cancer cells.
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Affiliation(s)
- Malka Cohen-Armon
- The Sackler School of Medicine and Sagol School of Neuroscience, Tel Aviv University, Tel-Aviv 69978, Israel.
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5
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Singh M, Rajawat J, Kuldeep J, Shukla N, Mishra DP, Siddiqi MI. Integrated support vector machine and pharmacophore based virtual screening driven identification of thiophene carboxamide scaffold containing compound as potential PARP1 inhibitor. J Biomol Struct Dyn 2021; 40:8494-8507. [PMID: 33950778 DOI: 10.1080/07391102.2021.1913229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Poly (ADP-ribose) polymerase-1 (PARP1) inhibition strategy for cancer treatment is gaining advantage particularly in patients having a mutation in BRCA1/BRCA2 gene. To date, four drugs have obtained FDA approval and some inhibitors are in clinical trials. To identify more potent PARP1 inhibitors extensive research is going on to enrich the library of PARP1 inhibitors with compounds belonging to different classes. We employed an integrated virtual screening approach to identify potential PARP1 inhibitors. The sequential support vector machine (SVM) and pharmacophore model based virtual screening was carried out on the Maybridge library. The obtained hits were docked in the binding site of the PARP1 catalytic domain and nine drug-like compounds showing good ADME properties and form critical molecular interactions with the binding site residues were considered for the in vitro PARP1 inhibition assay. MD simulations were performed to decipher the stability of the PARP1-ligand complexes. Hydrogen bond interactions were also probed for their stability during MD simulations. We have identified three compounds (BTB02767, GK01172, and KM09200) showing 50% inhibition of PARP1 enzyme activity at 25 μM. BTB02767 and KM09200 have phthalazinone scaffold, while GK01172 bears a thiophene carboxamide scaffold, which could be a new chemotype of PARP1 inhibitors. In conclusion, GK01172 may serve as an important compound for further development of PARP1 inhibitors containing thiophene carboxamide scaffold.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Maninder Singh
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute (CSIR-CDRI), Lucknow, India
| | - Jyotika Rajawat
- Endocrinology Division, CSIR-Central Drug Research Institute (CSIR-CDRI), Lucknow, India
| | - Jitendra Kuldeep
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute (CSIR-CDRI), Lucknow, India
| | - Nidhi Shukla
- Endocrinology Division, CSIR-Central Drug Research Institute (CSIR-CDRI), Lucknow, India
| | - Durga Prasad Mishra
- Endocrinology Division, CSIR-Central Drug Research Institute (CSIR-CDRI), Lucknow, India
| | - Mohammad Imran Siddiqi
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute (CSIR-CDRI), Lucknow, India
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6
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MYBL2 amplification in breast cancer: Molecular mechanisms and therapeutic potential. Biochim Biophys Acta Rev Cancer 2020; 1874:188407. [DOI: 10.1016/j.bbcan.2020.188407] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 07/21/2020] [Accepted: 07/21/2020] [Indexed: 02/08/2023]
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7
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Phenanthridine derivatives as potential HIV-1 protease inhibitors. Biomed Rep 2020; 13:66. [PMID: 33149910 DOI: 10.3892/br.2020.1373] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 09/14/2020] [Indexed: 12/11/2022] Open
Abstract
In the present study, the antiviral activity of phenanthridine derivatives was assessed. In total, the inhibitory effect of eight structurally similar low-molecular-weight hydrophobic compounds on HIV-1 protease (HIVp) was investigated. HIVp is a key enzyme in the HIV-1 life cycle. Surface plasmon resonance technology was used for affinity assessment of compounds binding with either monomeric or dimeric forms of HIVp. HIVp enzyme inhibition assays with chromogenic substrate VII were also used to determine the IC50 values. The most potent compound was 3,3,9,9-tetramethyl-3,4,9,10-tetrahydro-2H,8H-phenanthridine-1,7-dione which binds to monomeric and dimeric forms of HIVp (apparent dissociation constant, 2-7 µM; IC50, 36 µМ), while possessing the most favorable Absorption, Distribution, Metabolism and Excretion parameters. Molecular docking simulations highlighted certain differences in the binding patterns of the phenanthridine derivatives with HIVp amino acid residues forming the flaps domain, monomer/monomer interfaces and the active site cavity of HIVp. Thus, it was hypothesized that the inhibitory effect of phenanthridine compounds on the enzymatic activity of HIVp may be due to restriction of substrate access to the HIVp active site.
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8
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The Modified Phenanthridine PJ34 Unveils an Exclusive Cell-Death Mechanism in Human Cancer Cells. Cancers (Basel) 2020; 12:cancers12061628. [PMID: 32575437 PMCID: PMC7352794 DOI: 10.3390/cancers12061628] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 06/15/2020] [Indexed: 12/17/2022] Open
Abstract
This overview summarizes recent data disclosing the efficacy of the PARP inhibitor PJ34 in exclusive eradication of a variety of human cancer cells without impairing healthy proliferating cells. Its cytotoxic activity in cancer cells is attributed to the insertion of specific un-repairable anomalies in the structure of their mitotic spindle, leading to mitotic catastrophe cell death. This mechanism paves the way to a new concept of cancer therapy.
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9
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Keung MY, Wu Y, Badar F, Vadgama JV. Response of Breast Cancer Cells to PARP Inhibitors Is Independent of BRCA Status. J Clin Med 2020; 9:jcm9040940. [PMID: 32235451 PMCID: PMC7231148 DOI: 10.3390/jcm9040940] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 03/26/2020] [Accepted: 03/27/2020] [Indexed: 12/12/2022] Open
Abstract
Poly (ADP-ribose) polymerase inhibitors (PARPi) have proven to be beneficial to patients with metastatic breast cancer with BRCA1/2 (BReast CAncer type 1 and type 2 genes) mutations. However, certain PARPi in pre-clinical studies have been shown to inhibit cell growth and promote the death of breast cancer cells lacking mutations in BRCA1/2. Here, we examined the inhibitory potency of 13 different PARPi in 12 breast cancer cell lines with and without BRCA-mutations using cell viability assays. The results showed that 5 of the 8 triple-negative breast cancer (TNBC) cell lines were susceptible to PARPi regardless of the BRCA-status. The estrogen receptor (ER) negative/ human epidermal growth factor receptor 2 (HER2) positive (ER-/HER2+) cells, SKBR3 and JIMT1, showed high sensitivity to Talazoparib. Especially JIMT1, which is known to be resistant to trastuzumab, was responsive to Talazoparib at 0.002 µM. Niraparib, Olaparib, and Rucaparib also demonstrated effective inhibitory potency in both advanced TNBC and ER-/HER2+ cells with and without BRCA-mutations. In contrast, a BRCA-mutant TNBC line, HCC1937, was less sensitive to Talazoparib, Niraparib, Rucaparib, and not responsive to Olaparib. Other PARPi such as UPF1069, NU1025, AZD2461, and PJ34HCl also showed potent inhibitory activity in specific breast cancer cells. Our data suggest that the benefit of PARPi therapy in breast cancer is beyond the BRCA-mutations, and equally effective on metastatic TNBC and ER-/HER2+ breast cancers.
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Affiliation(s)
- Man Yee Keung
- Division of Cancer Research and Training, Charles R. Drew University of Medicine and Science, Los Angeles, CA 90059, USA; (M.Y.K.); (F.B.)
| | - Yanyuan Wu
- Division of Cancer Research and Training, Charles R. Drew University of Medicine and Science, Los Angeles, CA 90059, USA; (M.Y.K.); (F.B.)
- David Geffen UCLA School of Medicine, Jonsson Comprehensive Cancer Center, University of California at Los Angeles, Los Angeles, CA 90095, USA
- Correspondence: (Y.W.); (J.V.V.)
| | - Francesca Badar
- Division of Cancer Research and Training, Charles R. Drew University of Medicine and Science, Los Angeles, CA 90059, USA; (M.Y.K.); (F.B.)
| | - Jaydutt V. Vadgama
- Division of Cancer Research and Training, Charles R. Drew University of Medicine and Science, Los Angeles, CA 90059, USA; (M.Y.K.); (F.B.)
- David Geffen UCLA School of Medicine, Jonsson Comprehensive Cancer Center, University of California at Los Angeles, Los Angeles, CA 90095, USA
- Correspondence: (Y.W.); (J.V.V.)
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10
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Fluzoparib increases radiation sensitivity of non-small cell lung cancer (NSCLC) cells without BRCA1/2 mutation, a novel PARP1 inhibitor undergoing clinical trials. J Cancer Res Clin Oncol 2019; 146:721-737. [PMID: 31786739 DOI: 10.1007/s00432-019-03097-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 11/22/2019] [Indexed: 12/12/2022]
Abstract
PROPOSE Poly (ADP-ribose) polymerase 1 inhibitors were originally investigated as anti-cancer therapeutics with BRCA1/2 genes mutation. Here, we investigate the effectiveness of a novel PARP1 inhibitor fluzoparib, for enhancing the radiation sensitivity of NSCLC cells lacking BRCA1/2 mutation. METHODS We used MTS assays, western blotting, colony formation assays, immunofluorescence staining, and flow cytometry to evaluate the radiosensitization of NSCLC cells to fluzoparib and explore the underlying mechanisms in vitro. Through BRCA1 and RAD50 genes knockdown, we established dysfunctional homologous recombination (HR) DNA repair pathway models in NSCLC cells. We next investigated the radiosensitization effect of fluzoparib in vivo using human NSCLC xenograft models in mice. The expression of PARP1 and BRCA1 in human NSCLC tumor samples was measured by immunohistochemistry. Furthermore, we sequenced HR-related gene mutations and analyzed their frequencies in advanced NSCLC. RESULTS In vitro experiments in NSCLC cell lines along with in vivo experiments using an NSCLC xenograft mouse model demonstrated the radiosensitization effect of fluzoparib. The underlying mechanisms involved increased apoptosis, cell-cycle arrest, enhanced irradiation-induced DNA damage, and delayed DNA-damage repair. Immunohistochemical staining showed no correlation between the expression of PARP1 and BRCA1. Moreover, our sequencing results revealed high mutation frequencies for the BRCA1/2, CHEK2, ATR, and RAD50 genes. CONCLUSION The potential therapeutic value of fluzoparib for increasing the radiation sensitivity of NSCLC is well confirmed. Moreover, our findings of high mutation frequencies among HR genes suggest that PARP1 inhibition may be an effective treatment strategy for advanced non-small cell lung cancer patients.
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11
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Visochek L, Atias D, Spektor I, Castiel A, Golan T, Cohen-Armon M. The phenanthrene derivative PJ34 exclusively eradicates human pancreatic cancer cells in xenografts. Oncotarget 2019; 10:6269-6282. [PMID: 31692907 PMCID: PMC6817443 DOI: 10.18632/oncotarget.27268] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 09/10/2019] [Indexed: 11/25/2022] Open
Abstract
Recent reports demonstrate an exclusive eradication of a variety of human cancer cells by the modified phenanthridine PJ34. Their eradication during mitosis is attributed to PJ34 preventing NuMA clustering in the mitotic spindle poles of human malignant cells, which is crucial for their normal mitosis. Here, the effect of PJ34 is tested in cell cultures and xenografts of human pancreas ductal adenocarcinoma. Evidence is presented for a substantial reduction (80-90%) of PANC1 cancer cells in xenografts, measured 30 days after the treatment with PJ34 has been terminated. Benign cells infiltrated into the PANC1 tumors (stroma) were not affected. Growth, weight gain and behavior of the treated nude mice were not impaired during, and 30 days after the treatment with PJ34. The efficient eradication of malignant cells in human pancreas cancer xenografts presents a new model of pancreas cancer treatment.
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Affiliation(s)
- Leonid Visochek
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 69978, Israel
| | - Dikla Atias
- Oncology Institute, Sheba Medical Center, Ramat Gan 53621, Israel
| | - Itay Spektor
- Oncology Institute, Sheba Medical Center, Ramat Gan 53621, Israel
| | - Asher Castiel
- Oncology Institute, Sheba Medical Center, Ramat Gan 53621, Israel
| | - Talia Golan
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 69978, Israel.,Oncology Institute, Sheba Medical Center, Ramat Gan 53621, Israel
| | - Malka Cohen-Armon
- Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 69978, Israel.,Sagol School of Neuroscience, Tel-Aviv University, Tel-Aviv 69978, Israel
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12
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Cohen-Armon M, Yeheskel A, Pascal JM. Signal-induced PARP1-Erk synergism mediates IEG expression. Signal Transduct Target Ther 2019; 4:8. [PMID: 30993015 PMCID: PMC6459926 DOI: 10.1038/s41392-019-0042-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 01/10/2019] [Accepted: 03/06/2019] [Indexed: 12/14/2022] Open
Abstract
A recently disclosed Erk-induced PARP1 activation mechanism mediates the expression of immediate early genes (IEGs) in response to a variety of extra- and intracellular signals implicated in memory acquisition, development and proliferation. Here, we review this mechanism, which is initiated by stimulation-induced binding of PARP1 to phosphorylated Erk translocated into the nucleus. This binding maintains long-lasting synergistic activity of these proteins, which offers a new pattern for targeted therapy.
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Affiliation(s)
- Malka Cohen-Armon
- Department of Physiology and Pharmacology, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, 69978 Israel
- Sagol School of Neuroscience, Tel-Aviv University, Tel-Aviv, 69978 Israel
| | - Adva Yeheskel
- Bioinformatics Unit, George S. Wise Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv, 69978 Israel
| | - John M. Pascal
- Department of Biochemistry and Molecular Medicine, University of Montreal, Québec, Canada
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13
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Taglieri L, Saccoliti F, Nicolai A, Peruzzi G, Madia VN, Tudino V, Messore A, Di Santo R, Artico M, Taurone S, Salvati M, Costi R, Scarpa S. Discovery of a pyrimidine compound endowed with antitumor activity. Invest New Drugs 2019; 38:39-49. [PMID: 30900116 DOI: 10.1007/s10637-019-00762-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 03/08/2019] [Indexed: 02/07/2023]
Abstract
Recently, some synthetic nitrogen-based heterocyclic molecules, such as PJ34, have shown pronounced antitumor activity. Therefore, we designed and synthesized new derivatives characterized by a nitrogen-containing scaffold and evaluated their antiproliferative properties in tumor cells. We herein report the effects of three newly synthesized compounds on cell lines from three different human cancers: triple-negative breast cancer, colon carcinoma and glioblastoma. We found that two of these compounds did not affect proliferation, while the third significantly inhibited replication of the three cell lines. Moreover, this third molecule at 20 μM led to the upregulation of p21 and p27 and blockage of the cell cycle at G0/G1; in addition, it induced apoptosis in all three cell lines when used at higher concentrations (30-50 μM). The results demonstrate that this compound is a potent inhibitor of replication, an inducer of apoptosis and a negative regulator of cell cycle progression for cancer cells of different histotypes. Our data suggest a potential role for this new molecule as an interesting and powerful tool for new approaches in treating various cancers.
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Affiliation(s)
- Ludovica Taglieri
- Department of Experimental Medicine, Sapienza University, Viale Regina Elena 324, 00161, Rome, Italy
| | - Francesco Saccoliti
- Dipartimento di Chimica e Tecnologie del Farmaco, Istituto Pasteur-Fondazione Cenci Bolognetti, Sapienza University, Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Alice Nicolai
- Department of Experimental Medicine, Sapienza University, Viale Regina Elena 324, 00161, Rome, Italy
- Department of Sensory Organs, Sapienza University, Viale del Policlinico 155, 00161, Rome, Italy
| | - Giovanna Peruzzi
- Italian Institute of Technology, Center for Life Nanoscience@Sapienza, Viale Regina Elena 324, 00161, Rome, Italy
| | - Valentina Noemi Madia
- Dipartimento di Chimica e Tecnologie del Farmaco, Istituto Pasteur-Fondazione Cenci Bolognetti, Sapienza University, Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Valeria Tudino
- Dipartimento di Chimica e Tecnologie del Farmaco, Istituto Pasteur-Fondazione Cenci Bolognetti, Sapienza University, Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Antonella Messore
- Dipartimento di Chimica e Tecnologie del Farmaco, Istituto Pasteur-Fondazione Cenci Bolognetti, Sapienza University, Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Roberto Di Santo
- Dipartimento di Chimica e Tecnologie del Farmaco, Istituto Pasteur-Fondazione Cenci Bolognetti, Sapienza University, Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Marco Artico
- Department of Sensory Organs, Sapienza University, Viale del Policlinico 155, 00161, Rome, Italy
| | - Samanta Taurone
- Department of Sensory Organs, Sapienza University, Viale del Policlinico 155, 00161, Rome, Italy
| | - Maurizio Salvati
- Department of Human Neurosciences, Sapienza University, Viale Regina Elena 324, 00161, Rome, Italy
| | - Roberta Costi
- Dipartimento di Chimica e Tecnologie del Farmaco, Istituto Pasteur-Fondazione Cenci Bolognetti, Sapienza University, Piazzale Aldo Moro 5, 00185, Rome, Italy.
| | - Susanna Scarpa
- Department of Experimental Medicine, Sapienza University, Viale Regina Elena 324, 00161, Rome, Italy
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14
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Vrhovac Madunić I, Madunić J, Antunović M, Paradžik M, Garaj-Vrhovac V, Breljak D, Marijanović I, Gajski G. Apigenin, a dietary flavonoid, induces apoptosis, DNA damage, and oxidative stress in human breast cancer MCF-7 and MDA MB-231 cells. Naunyn Schmiedebergs Arch Pharmacol 2018. [PMID: 29541820 DOI: 10.1007/s00210-018-1486-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Apigenin is found in several dietary plant foods such as vegetables and fruits. To investigate potential anticancer properties of apigenin on human breast cancer, ER-positive MCF-7 and triple-negative MDA MB-231 cells were used. Moreover, toxicological safety of apigenin towards normal cells was evaluated in human lymphocytes. Cytotoxicity of apigenin towards cancer cells was evaluated by MTT assay whereas further genotoxic and oxidative stress parameters were measured by comet and lipid peroxidation assays, respectively. In order to examine the type of cell death induced by apigenin, several biomarkers were used. Toxicological safety towards normal cells was evaluated by cell viability and comet assays. After the treatment with apigenin, we observed changes in cell morphology in a dose- (10 to 100 μM) and time-dependent manner. Moreover, apigenin caused cell death in both cell lines leading to significant toxicity and dominantly to apoptosis. Furthermore, apigenin proved to be genotoxic towards the selected cancer cells with a potential to induce oxidative damage to lipids. Of great importance is that no significant cytogenotoxic effects were detected in normal cells. The observed cytogenotoxic and pro-cell death activities of apigenin coupled with its low toxicity towards normal cells indicate that this natural product could be used as a future anticancer modality. Therefore, further analysis to determine the exact mechanism of action and in vivo studies on animal models are warranted.
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Affiliation(s)
- Ivana Vrhovac Madunić
- Molecular Toxicology Unit, Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10000, Zagreb, Croatia
| | - Josip Madunić
- Department of Molecular Biology, Faculty of Science, University of Zagreb, Horvatovac 102a/2, 10000, Zagreb, Croatia
| | - Maja Antunović
- Department of Molecular Biology, Faculty of Science, University of Zagreb, Horvatovac 102a/2, 10000, Zagreb, Croatia
| | - Mladen Paradžik
- Laboratory for Cell Biology and Signalling, Division of Molecular Biology, Ruđer Bošković Institute, Bijenička cesta 54, 10000, Zagreb, Croatia
| | - Vera Garaj-Vrhovac
- Mutagenesis Unit, Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10000, Zagreb, Croatia
| | - Davorka Breljak
- Molecular Toxicology Unit, Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10000, Zagreb, Croatia
| | - Inga Marijanović
- Department of Molecular Biology, Faculty of Science, University of Zagreb, Horvatovac 102a/2, 10000, Zagreb, Croatia
| | - Goran Gajski
- Mutagenesis Unit, Institute for Medical Research and Occupational Health, Ksaverska cesta 2, 10000, Zagreb, Croatia.
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15
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Visochek L, Castiel A, Mittelman L, Elkin M, Atias D, Golan T, Izraeli S, Peretz T, Cohen-Armon M. Exclusive destruction of mitotic spindles in human cancer cells. Oncotarget 2017; 8:20813-20824. [PMID: 28209915 PMCID: PMC5400547 DOI: 10.18632/oncotarget.15343] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 01/31/2017] [Indexed: 12/15/2022] Open
Abstract
We identified target proteins modified by phenanthrenes that cause exclusive eradication of human cancer cells. The cytotoxic activity of the phenanthrenes in a variety of human cancer cells is attributed by these findings to post translational modifications of NuMA and kinesins HSET/kifC1 and kif18A. Their activity prevented the binding of NuMA to α-tubulin and kinesins in human cancer cells, and caused aberrant spindles. The most efficient cytotoxic activity of the phenanthridine PJ34, caused significantly smaller aberrant spindles with disrupted spindle poles and scattered extra-centrosomes and chromosomes. Concomitantly, PJ34 induced tumor growth arrest of human malignant tumors developed in athymic nude mice, indicating the relevance of its activity for cancer therapy.
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Affiliation(s)
- Leonid Visochek
- The Neufeld Cardiac Research Institute, Department of Physiology and Pharmacology, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 69978, Israel
| | - Asher Castiel
- Cancer Research Center, Sheba Medical Center, Ramat Gan 53621, Israel
| | - Leonid Mittelman
- The Imaging Unit, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 69978, Israel
| | - Michael Elkin
- Sharett Oncology Institute, Hadassah Medical Center, Ein-Kerem, Jerusalem 91120, Israel
| | - Dikla Atias
- Cancer Research Center, Sheba Medical Center, Ramat Gan 53621, Israel
| | - Talia Golan
- Cancer Research Center, Sheba Medical Center, Ramat Gan 53621, Israel
| | - Shai Izraeli
- Cancer Research Center, Sheba Medical Center, Ramat Gan 53621, Israel.,The Department of Human Molecular Genetics and Biochemistry, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 69978, Israel
| | - Tamar Peretz
- Sharett Oncology Institute, Hadassah Medical Center, Ein-Kerem, Jerusalem 91120, Israel
| | - Malka Cohen-Armon
- The Neufeld Cardiac Research Institute, Department of Physiology and Pharmacology, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 69978, Israel.,Sagol School of Neuroscience, Tel-Aviv University, Tel-Aviv 69978, Israel
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16
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RBR-type E3 ubiquitin ligase RNF144A targets PARP1 for ubiquitin-dependent degradation and regulates PARP inhibitor sensitivity in breast cancer cells. Oncotarget 2017; 8:94505-94518. [PMID: 29212245 PMCID: PMC5706891 DOI: 10.18632/oncotarget.21784] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 09/23/2017] [Indexed: 01/06/2023] Open
Abstract
Poly(ADP-ribose) polymerase 1 (PARP1), a critical DNA repair protein, is frequently upregulated in breast tumors with a key role in breast cancer progression. Consequently, PARP inhibitors have emerged as promising therapeutics for breast cancers with DNA repair deficiencies. However, relatively little is known about the regulatory mechanism of PARP1 expression and the determinants of PARP inhibitor sensitivity in breast cancer cells. Here, we report that ring finger protein 144A (RNF144A), a RING-between-RING (RBR)-type E3 ubiquitin ligase with an unexplored functional role in human cancers, interacts with PARP1 through its carboxy-terminal region containing the transmembrane domain, and targets PARP1 for ubiquitination and subsequent proteasomal degradation. Moreover, induced expression of RNF144A decreases PARP1 protein levels and renders breast cancer cells resistant to the clinical-grade PARP inhibitor olaparib. Conversely, knockdown of endogenous RNF144A increases PARP1 protein levels and enhances cellular sensitivity to olaparib. Together, these findings define RNF144A as a novel regulator of PARP1 protein abundance and a potential determinant of PARP inhibitor sensitivity in breast cancer cells, which may eventually guide the optimal use of PARP inhibitors in the clinic.
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17
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Chroma K, Mistrik M, Moudry P, Gursky J, Liptay M, Strauss R, Skrott Z, Vrtel R, Bartkova J, Kramara J, Bartek J. Tumors overexpressing RNF168 show altered DNA repair and responses to genotoxic treatments, genomic instability and resistance to proteotoxic stress. Oncogene 2016; 36:2405-2422. [DOI: 10.1038/onc.2016.392] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 08/14/2016] [Accepted: 09/12/2016] [Indexed: 12/20/2022]
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18
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PARP Inhibition Suppresses Growth of EGFR-Mutant Cancers by Targeting Nuclear PKM2. Cell Rep 2016; 15:843-856. [PMID: 27149849 DOI: 10.1016/j.celrep.2016.03.070] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 02/20/2016] [Accepted: 03/18/2016] [Indexed: 02/07/2023] Open
Abstract
Upon growth factor stimulation or in some EGFR mutant cancer cells, PKM2 translocates into the nucleus to induce glycolysis and cell growth. Here, we report that nuclear PKM2 binds directly to poly-ADP ribose, and this PAR-binding capability is critical for its nuclear localization. Accordingly, PARP inhibition prevents nuclear retention of PKM2 and therefore suppresses cell proliferation and tumor growth. In addition, we found that PAR level correlates with nuclear localization of PKM2 in EGFR mutant brain and lung cancers, suggesting that PAR-dependent nuclear localization of PKM2 likely contributes to tumor progression in EGFR mutant glioblastoma and lung cancers. In addition, some EGFR-inhibitor-resistant lung cancer cells are sensitive to PARP inhibitors. Taken together, our data indicate that suppression of PKM2 nuclear function by PARP inhibitors represents a treatment strategy for EGFR-inhibitor-resistant cancers.
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19
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Kim H, Tarhuni A, Abd Elmageed ZY, Boulares AH. Poly(ADP-ribose) polymerase as a novel regulator of 17β-estradiol-induced cell growth through a control of the estrogen receptor/IGF-1 receptor/PDZK1 axis. J Transl Med 2015; 13:233. [PMID: 26183824 PMCID: PMC4504350 DOI: 10.1186/s12967-015-0589-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Accepted: 06/29/2015] [Indexed: 01/13/2023] Open
Abstract
Background We and others have extensively investigated the role of PARP-1 in cell growth and demise in response to pathophysiological cues. Most of the clinical trials on PARP inhibitors are targeting primarily estrogen receptor (ER) negative cancers with BRCA-deficiency. It is surprising that the role of the enzyme has yet to be investigated in ER-mediated cell growth. It is noteworthy that ER is expressed in the majority of breast cancers. We recently showed that the scaffolding protein PDZK1 is critical for 17β-estradiol (E2)-induced growth of breast cancer cells. We demonstrated that E2-induced PDZK1 expression is indirectly regulated by ER and requires IGF-1 receptor (IGF-1R). Methods The breast cancer cell lines MCF-7 and BT474 were used as ER(+) cell culture models. Thieno[2,3-c]isoquinolin-5-one (TIQ-A) and olaparib (AZD2281) were used as potent inhibitors of PARP. PARP-1 knockdown by shRNA was used to show specificity of the effects to PARP-1. Results In this study, we aimed to determine the effect of PARP inhibition on estrogen-induced growth of breast cancer cells and examine whether the potential effect is linked to PDZK1 and IGF-1R expression. Our results show that PARP inhibition pharmacologically by TIQ-A or olaparib or by PARP-1 knockdown blocked E2-dependent growth of MCF-7 cells. Such inhibitory effect was also observed in olaparib-treated BT474 cells. The effect of PARP inhibition on cell growth coincided with an efficient reduction in E2-induced PDZK1 expression. This effect was accompanied by a similar decrease in the cell cycle protein cyclin D1. PARP appeared to regulate E2-induced PDZK1 at the mRNA level. Such regulation may be linked to a modulation of IGF-1R as PARP inhibition pharmacologically or by PARP-1 knockdown efficiently reduced E2-induced expression of the receptor at the protein and mRNA levels. Conclusions Overall, our results show for the first time that PARP regulates E2-mediated cell growth by controlling the ER/IGF-1R/PDZK1 axis. These findings suggest that the relationship between ER, PDZK1, and IGF-1R may be perturbed by blocking PARP function and that PARP inhibitors may be considered in clinical trials on ER(+) cancers.
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Affiliation(s)
- Hogyoung Kim
- The Stanley Scott Cancer Center, Louisiana State University Health Sciences Center, 1700 Tulane Ave, New Orleans, LA, 70112, USA.
| | - Abdelmetalab Tarhuni
- The Stanley Scott Cancer Center, Louisiana State University Health Sciences Center, 1700 Tulane Ave, New Orleans, LA, 70112, USA.
| | | | - A Hamid Boulares
- The Stanley Scott Cancer Center, Louisiana State University Health Sciences Center, 1700 Tulane Ave, New Orleans, LA, 70112, USA.
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20
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Zhai L, Li S, Li H, Zheng Y, Lang R, Fan Y, Gu F, Guo X, Zhang X, Fu L. Polymorphisms in poly (ADP-ribose) polymerase-1 (PARP1) promoter and 3' untranslated region and their association with PARP1 expression in breast cancer patients. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2015; 8:7059-7071. [PMID: 26261599 PMCID: PMC4525933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Accepted: 03/30/2015] [Indexed: 06/04/2023]
Abstract
Within the past several years, inhibition of the PARP1 activity has been emerged as one of the most exciting and promising strategies for triple-negative breast cancer (TNBC) therapy. The purpose of this study is to assess PARP1 expression in TNBCs and to evaluate the association between polymorphisms in PARP1 promoter or 3' untranslated region (3'UTR) and PARP1 expression. It was found that PARP1 was overexpressed in nuclear (nPARP1), cytoplasm (cPARP1) and nuclear-cytoplasmic coexisting (coPARP1) of 187 TNBCs in comparison to that of 115 non-TNBCs (nPARP1, p<0.001; cPARP1, p<0.001; coPARP1, p<0.001). High expression of nPARP1 and cPARP1 in breast cancer was related to worse progression-free survival (nPARP1, p=0.007, cPARP1, p=0.003). Additionally, we identified seven published polymorphism sites in the promoter region and in 3'UTR of PARP1 by sequencing. rs7527192 and rs2077197 genotypes were found to be significantly associated with the cPARP1 expression in TNBC patients (rs7527192 AA+GA versus GG, p=0.014; rs2077197 AA+GA versus GG, p=0.041). These findings were confirmed in an independent validation set of 88 TNBCs (rs7527192 GG versus GA+AA, p=0.030; rs2077197 GG versus GA+AA, p=0.030). The PARP1 over-expression including nuclear, cytoplasm and nuclear-cytoplasmic coexisting is a feature of TNBCs and the assessment of its expression may help to predict the efficacy of chemotherapy with PARP1 inhibitor.
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Affiliation(s)
- Lili Zhai
- Department of Breast Cancer Pathology and Research Laboratory, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer; Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University, Ministry of Education; Key Laboratory of Cancer Prevention and Therapy; State Key Laboratory of Breast Cancer ResearchTianjin, P.R. China
| | - Shuai Li
- Department of Breast Cancer Pathology and Research Laboratory, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer; Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University, Ministry of Education; Key Laboratory of Cancer Prevention and Therapy; State Key Laboratory of Breast Cancer ResearchTianjin, P.R. China
| | - Huilan Li
- Department of Breast Cancer Pathology and Research Laboratory, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer; Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University, Ministry of Education; Key Laboratory of Cancer Prevention and Therapy; State Key Laboratory of Breast Cancer ResearchTianjin, P.R. China
| | - Yi Zheng
- Department of Breast Cancer Pathology and Research Laboratory, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer; Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University, Ministry of Education; Key Laboratory of Cancer Prevention and Therapy; State Key Laboratory of Breast Cancer ResearchTianjin, P.R. China
| | - Ronggang Lang
- Department of Breast Cancer Pathology and Research Laboratory, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer; Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University, Ministry of Education; Key Laboratory of Cancer Prevention and Therapy; State Key Laboratory of Breast Cancer ResearchTianjin, P.R. China
| | - Yu Fan
- Department of Breast Cancer Pathology and Research Laboratory, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer; Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University, Ministry of Education; Key Laboratory of Cancer Prevention and Therapy; State Key Laboratory of Breast Cancer ResearchTianjin, P.R. China
| | - Feng Gu
- Department of Breast Cancer Pathology and Research Laboratory, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer; Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University, Ministry of Education; Key Laboratory of Cancer Prevention and Therapy; State Key Laboratory of Breast Cancer ResearchTianjin, P.R. China
| | - Xiaojing Guo
- Department of Breast Cancer Pathology and Research Laboratory, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer; Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University, Ministry of Education; Key Laboratory of Cancer Prevention and Therapy; State Key Laboratory of Breast Cancer ResearchTianjin, P.R. China
| | | | - Li Fu
- Department of Breast Cancer Pathology and Research Laboratory, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center of Cancer; Key Laboratory of Breast Cancer Prevention and Therapy, Tianjin Medical University, Ministry of Education; Key Laboratory of Cancer Prevention and Therapy; State Key Laboratory of Breast Cancer ResearchTianjin, P.R. China
- 2011 Collaborative Innovation Center of Tianjin for Medical EpigeneticsTianjin, P.R. China
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21
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Motta C, D'Angeli F, Scalia M, Satriano C, Barbagallo D, Naletova I, Anfuso CD, Lupo G, Spina-Purrello V. PJ-34 inhibits PARP-1 expression and ERK phosphorylation in glioma-conditioned brain microvascular endothelial cells. Eur J Pharmacol 2015; 761:55-64. [PMID: 25934569 DOI: 10.1016/j.ejphar.2015.04.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 04/17/2015] [Accepted: 04/20/2015] [Indexed: 12/19/2022]
Abstract
Inhibitors of PARP-1(Poly(ADP-ribose) polymerase-1) act by competing with NAD(+), the enzyme physiological substrate, which play a protective role in many pathological conditions characterized by PARP-1 overactivation. It has been shown that PARP-1 also promotes tumor growth and progression through its DNA repair activity. Since angiogenesis is an essential requirement for these activities, we sought to determine whether PARP inhibition might affect rat brain microvascular endothelial cells (GP8.3) migration, stimulated by C6-glioma conditioned medium (CM). Through wound-healing experiments and MTT analysis, we demonstrated that PARP-1 inhibitor PJ-34 [N-(6-Oxo-5,6-dihydrophenanthridin-2-yl)-N,N-dimethylacetamide] abolishes the migratory response of GP8.3 cells and reduces their viability. PARP-1 also acts in a DNA independent way within the Extracellular-Regulated-Kinase (ERK) signaling cascade, which regulates cell proliferation and differentiation. By western analysis and confocal laser scanning microscopy (LSM), we analyzed the effects of PJ-34 on PARP-1 expression, phospho-ERK and phospho-Elk-1 activation. The effect of MEK (mitogen-activated-protein-kinase-kinase) inhibitor PD98059 (2-(2-Amino-3-methoxyphenyl)-4 H-1-benzopyran-4-one) on PARP-1 expression in unstimulated and in CM-stimulated GP8.3 cells was analyzed by RT-PCR. PARP-1 expression and phospho-ERK activation were significantly reduced by treatment of GP8.3 cells with PJ-34 or PD98059. By LSM, we further demonstrated that PARP-1 and phospho-ERK are coexpressed and share the same subcellular localization in GP8.3 cells, in the cytoplasm as well as in nucleoplasm. Based on these data, we propose that PARP-1 and phospho-ERK interact in the cytosol and then translocate to the nucleus, where they trigger a proliferative response. We also propose that PARP-1 inhibition blocks CM-induced endothelial migration by interfering with ERK signal-transduction pathway.
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Affiliation(s)
- Carla Motta
- Department of Biomedical Sciences and Biotecnology, University of Catania, Via Santa Sofia 64, 95125 Catania, Italy
| | - Floriana D'Angeli
- Department of Biomedical Sciences and Biotecnology, University of Catania, Via Santa Sofia 64, 95125 Catania, Italy
| | - Marina Scalia
- Department of Biomedical Sciences and Biotecnology, University of Catania, Via Santa Sofia 64, 95125 Catania, Italy
| | - Cristina Satriano
- Department of Chemical Sciences, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy
| | - Davide Barbagallo
- Department of Biomedical Sciences and Biotecnology, University of Catania, Via Santa Sofia 64, 95125 Catania, Italy
| | - Irina Naletova
- Department of Biomedical Sciences and Biotecnology, University of Catania, Via Santa Sofia 64, 95125 Catania, Italy
| | - Carmelina Daniela Anfuso
- Department of Biomedical Sciences and Biotecnology, University of Catania, Via Santa Sofia 64, 95125 Catania, Italy
| | - Gabriella Lupo
- Department of Biomedical Sciences and Biotecnology, University of Catania, Via Santa Sofia 64, 95125 Catania, Italy
| | - Vittoria Spina-Purrello
- Department of Biomedical Sciences and Biotecnology, University of Catania, Via Santa Sofia 64, 95125 Catania, Italy.
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22
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Li Z, Yu H, Feng Y, Hou Z, Zhang L, Yang W, Wu Y, Xiao Y, Guo H. Phosphine-catalyzed [4 + 3] cycloaddition reaction of aromatic azomethine imines with allenoates. RSC Adv 2015. [DOI: 10.1039/c5ra04374c] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
An efficient phosphine-catalyzed [4 + 3] cycloaddition of aromatic azomethine imines with allenoates has been developed, providing dinitrogen-fused heterocyclic compounds in moderate to excellent yields.
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Affiliation(s)
- Zhen Li
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100193
- China
| | - Hao Yu
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100193
- China
| | - Yalin Feng
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100193
- China
| | - Zhanfeng Hou
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100193
- China
| | - Lei Zhang
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100193
- China
| | - Wenjun Yang
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100193
- China
| | - Yang Wu
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100193
- China
| | - Yumei Xiao
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100193
- China
| | - Hongchao Guo
- Department of Applied Chemistry
- China Agricultural University
- Beijing 100193
- China
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23
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Filipponi P, Ostacolo C, Novellino E, Pellicciari R, Gioiello A. Continuous Flow Synthesis of Thieno[2,3-c]isoquinolin-5(4H)-one Scaffold: A Valuable Source of PARP-1 Inhibitors. Org Process Res Dev 2014. [DOI: 10.1021/op500074h] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Paolo Filipponi
- Dipartimento
di Scienze Farmaceutiche, Università di Perugia, Via del Liceo
1, I-06123 Perugia, Italy
| | - Carmine Ostacolo
- Dipartimento
di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, I-80131 Napoli, Italy
| | - Ettore Novellino
- Dipartimento
di Farmacia, Università degli Studi di Napoli Federico II, Via D. Montesano 49, I-80131 Napoli, Italy
| | - Roberto Pellicciari
- Dipartimento
di Scienze Farmaceutiche, Università di Perugia, Via del Liceo
1, I-06123 Perugia, Italy
- TES Pharma S.r.l.,
Via Palmiro Togliatti 22bis, I-06073
Loc. Terrioli, Corciano (Perugia), Italy
| | - Antimo Gioiello
- Dipartimento
di Scienze Farmaceutiche, Università di Perugia, Via del Liceo
1, I-06123 Perugia, Italy
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24
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Quantitative multi-parametric evaluation of centrosome declustering drugs: centrosome amplification, mitotic phenotype, cell cycle and death. Cell Death Dis 2014; 5:e1204. [PMID: 24787016 PMCID: PMC4047924 DOI: 10.1038/cddis.2014.164] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 01/26/2013] [Accepted: 02/07/2014] [Indexed: 12/23/2022]
Abstract
Unlike normal cells, cancer cells contain amplified centrosomes and rely on centrosome clustering mechanisms to form a pseudobipolar spindle that circumvents potentially fatal spindle multipolarity (MP). Centrosome clustering also promotes low-grade chromosome missegregation, which can drive malignant transformation and tumor progression. Putative ‘centrosome declustering drugs' represent a cancer cell-specific class of chemotherapeutics that produces a common phenotype of centrosome declustering and spindle MP. However, differences between individual agents in terms of efficacy and phenotypic nuances remain unexplored. Herein, we have developed a conceptual framework for the quantitative evaluation of centrosome declustering drugs by investigating their impact on centrosomes, clustering, spindle polarity, cell cycle arrest, and death in various cancer cell lines at multiple drug concentrations over time. Surprisingly, all centrosome declustering drugs evaluated in our study were also centrosome-amplifying drugs to varying extents. Notably, all declustering drugs induced spindle MP, and the peak extent of MP positively correlated with the induction of hypodiploid DNA-containing cells. Our data suggest acentriolar spindle pole amplification as a hitherto undescribed activity of some declustering drugs, resulting in spindle MP in cells that may not have amplified centrosomes. In general, declustering drugs were more toxic to cancer cell lines than non-transformed ones, with some exceptions. Through a comprehensive description and quantitative analysis of numerous phenotypes induced by declustering drugs, we propose a novel framework for the assessment of putative centrosome declustering drugs and describe cellular characteristics that may enhance susceptibility to them.
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25
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Jelinic P, Levine DA. New insights into PARP inhibitors' effect on cell cycle and homology-directed DNA damage repair. Mol Cancer Ther 2014; 13:1645-54. [PMID: 24694947 DOI: 10.1158/1535-7163.mct-13-0906-t] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In preclinical and clinical studies, olaparib and veliparib are the most represented PARP inhibitors (PARPi), which mainly target homologous DNA damage repair pathway-deficient cancer cells. Their off-target effects are not fully understood, especially with regard to cell cycle and homology-directed DNA damage repair. Our objective was to comparatively evaluate olaparib and veliparib in this context and correlate our findings with their therapeutic potential. We used a well-established direct repeat GFP (DR-GFP) reporter assay in U2OS(DR-GFP) and H1299(DR-GFP) cells and measured DNA damage repair activity upon drug treatment. Olaparib-treated U2OS(DR-GFP) cells showed a dramatic decrease in DNA damage repair versus veliparib irrespective of inhibitory potency. We demonstrate that this effect was a result of olaparib's strong effect on the cell cycle. Unlike in veliparib-treated U2OS(DR-GFP) cells, in olaparib-treated cells S-phase decreased and G(2)-phase increased sharply, indicating a G(2)-phase arrest-like state and replicative stress. This was further confirmed by upregulation of p53 and p21 and accumulation of cyclin A. Lack of the same effect in p53-null H1299(DR-GFP) cells suggested that olaparib's effect is p53 related, which was confirmed in p53-depleted U2OS(DR-GFP) and p53-null HCT116 cells. Importantly, we also demonstrate that olaparib, but not veliparib, induced a robust phosphorylation of Chk1, a crucial component of the replicative stress response pathway. Our data show olaparib and veliparib differ in their off-target effects; olaparib, unlike veliparib, mitigates DNA damage repair activity via G(2) cell-cycle arrest-like effect in a p53-dependent manner. These off-target effects may add to PARPis' anticancer properties.
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Affiliation(s)
- Petar Jelinic
- Authors' Affiliation: Gynecology Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Douglas A Levine
- Authors' Affiliation: Gynecology Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York
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26
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Aprile-Garcia F, Antunica-Noguerol M, Budziñski ML, Liberman AC, Arzt E. Novel insights into the neuroendocrine control of inflammation: the role of GR and PARP1. Endocr Connect 2014; 3:R1-R12. [PMID: 24243533 PMCID: PMC3869961 DOI: 10.1530/ec-13-0079] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Inflammatory responses are elicited after injury, involving release of inflammatory mediators that ultimately lead, at the molecular level, to the activation of specific transcription factors (TFs; mainly activator protein 1 and nuclear factor-κB). These TFs propagate inflammation by inducing the expression of cytokines and chemokines. The neuroendocrine system has a determinant role in the maintenance of homeostasis, to avoid exacerbated inflammatory responses. Glucocorticoids (GCs) are the key neuroendocrine regulators of the inflammatory response. In this study, we describe the molecular mechanisms involved in the interplay between inflammatory cytokines, the neuroendocrine axis and GCs necessary for the control of inflammation. Targeting and modulation of the glucocorticoid receptor (GR) and its activity is a common therapeutic strategy to reduce pathological signaling. Poly (ADP-ribose) polymerase 1 (PARP1) is an enzyme that catalyzes the addition of PAR on target proteins, a post-translational modification termed PARylation. PARP1 has a central role in transcriptional regulation of inflammatory mediators, both in neuroendocrine tumors and in CNS cells. It is also involved in modulation of several nuclear receptors. Therefore, PARP1 and GR share common inflammatory pathways with antagonic roles in the control of inflammatory processes, which are crucial for the effective maintenance of homeostasis.
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Affiliation(s)
- Fernando Aprile-Garcia
- Instituto de Investigación en Biomedicina de Buenos Aires – CONICET, Partner Institute of the Max Planck SocietyBuenos AiresArgentina
- Departamento de Fisiología, Biología Molecular y Celular, Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresBuenos AiresArgentina
| | - María Antunica-Noguerol
- Instituto de Investigación en Biomedicina de Buenos Aires – CONICET, Partner Institute of the Max Planck SocietyBuenos AiresArgentina
- Departamento de Fisiología, Biología Molecular y Celular, Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresBuenos AiresArgentina
| | - Maia Ludmila Budziñski
- Instituto de Investigación en Biomedicina de Buenos Aires – CONICET, Partner Institute of the Max Planck SocietyBuenos AiresArgentina
| | - Ana C Liberman
- Instituto de Investigación en Biomedicina de Buenos Aires – CONICET, Partner Institute of the Max Planck SocietyBuenos AiresArgentina
| | - Eduardo Arzt
- Instituto de Investigación en Biomedicina de Buenos Aires – CONICET, Partner Institute of the Max Planck SocietyBuenos AiresArgentina
- Departamento de Fisiología, Biología Molecular y Celular, Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresBuenos AiresArgentina
- Correspondence should be addressed to E Arzt
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XIA QING, CAI YUCHEN, PENG ROUJUN, WU GUOSHENG, SHI YANXIA, JIANG WENQI. The CDK1 inhibitor RO3306 improves the response of BRCA-proficient breast cancer cells to PARP inhibition. Int J Oncol 2013; 44:735-44. [DOI: 10.3892/ijo.2013.2240] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 11/13/2013] [Indexed: 11/05/2022] Open
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Castiel A, Visochek L, Mittelman L, Zilberstein Y, Dantzer F, Izraeli S, Cohen-Armon M. Cell death associated with abnormal mitosis observed by confocal imaging in live cancer cells. J Vis Exp 2013:e50568. [PMID: 23995751 DOI: 10.3791/50568] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Phenanthrene derivatives acting as potent PARP1 inhibitors prevented the bi-focal clustering of supernumerary centrosomes in multi-centrosomal human cancer cells in mitosis. The phenanthridine PJ-34 was the most potent molecule. Declustering of extra-centrosomes causes mitotic failure and cell death in multi-centrosomal cells. Most solid human cancers have high occurrence of extra-centrosomes. The activity of PJ-34 was documented in real-time by confocal imaging of live human breast cancer MDA-MB-231 cells transfected with vectors encoding for fluorescent γ-tubulin, which is highly abundant in the centrosomes and for fluorescent histone H2b present in the chromosomes. Aberrant chromosomes arrangements and de-clustered γ-tubulin foci representing declustered centrosomes were detected in the transfected MDA-MB-231 cells after treatment with PJ-34. Un-clustered extra-centrosomes in the two spindle poles preceded their cell death. These results linked for the first time the recently detected exclusive cytotoxic activity of PJ-34 in human cancer cells with extra-centrosomes de-clustering in mitosis, and mitotic failure leading to cell death. According to previous findings observed by confocal imaging of fixed cells, PJ-34 exclusively eradicated cancer cells with multi-centrosomes without impairing normal cells undergoing mitosis with two centrosomes and bi-focal spindles. This cytotoxic activity of PJ-34 was not shared by other potent PARP1 inhibitors, and was observed in PARP1 deficient MEF harboring extracentrosomes, suggesting its independency of PARP1 inhibition. Live confocal imaging offered a useful tool for identifying new molecules eradicating cells during mitosis.
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Reduced proficiency in homologous recombination underlies the high sensitivity of embryonal carcinoma testicular germ cell tumors to Cisplatin and poly (adp-ribose) polymerase inhibition. PLoS One 2012; 7:e51563. [PMID: 23251575 PMCID: PMC3520950 DOI: 10.1371/journal.pone.0051563] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Accepted: 11/01/2012] [Indexed: 02/02/2023] Open
Abstract
Testicular Germ Cell Tumors (TGCT) and patient-derived cell lines are extremely sensitive to cisplatin and other interstrand cross-link (ICL) inducing agents. Nevertheless, a subset of TGCTs are either innately resistant or acquire resistance to cisplatin during treatment. Understanding the mechanisms underlying TGCT sensitivity/resistance to cisplatin as well as the identification of novel strategies to target cisplatin-resistant TGCTs have major clinical implications. Herein, we have examined the proficiency of five embryonal carcinoma (EC) cell lines to repair cisplatin-induced ICLs. Using γH2AX staining as a marker of double strand break formation, we found that EC cell lines were either incapable of or had a reduced ability to repair ICL-induced damage. The defect correlated with reduced Homologous Recombination (HR) repair, as demonstrated by the reduction of RAD51 foci formation and by direct evaluation of HR efficiency using a GFP-reporter substrate. HR-defective tumors cells are known to be sensitive to the treatment with poly(ADP-ribose) polymerase (PARP) inhibitor. In line with this observation, we found that EC cell lines were also sensitive to PARP inhibitor monotherapy. The magnitude of sensitivity correlated with HR-repair reduced proficiency and with the expression levels and activity of PARP1 protein. In addition, we found that PARP inhibition strongly enhanced the response of the most resistant EC cells to cisplatin, by reducing their ability to overcome the damage. These results point to a reduced proficiency of HR repair as a source of sensitivity of ECs to ICL-inducing agents and PARP inhibitor monotherapy, and suggest that pharmacological inhibition of PARP can be exploited to target the stem cell component of the TGCTs (namely ECs) and to enhance the sensitivity of cisplatin-resistant TGCTs to standard treatments.
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30
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Wright RHG, Castellano G, Bonet J, Le Dily F, Font-Mateu J, Ballaré C, Nacht AS, Soronellas D, Oliva B, Beato M. CDK2-dependent activation of PARP-1 is required for hormonal gene regulation in breast cancer cells. Genes Dev 2012; 26:1972-83. [PMID: 22948662 DOI: 10.1101/gad.193193.112] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Eukaryotic gene regulation implies that transcription factors gain access to genomic information via poorly understood processes involving activation and targeting of kinases, histone-modifying enzymes, and chromatin remodelers to chromatin. Here we report that progestin gene regulation in breast cancer cells requires a rapid and transient increase in poly-(ADP)-ribose (PAR), accompanied by a dramatic decrease of cellular NAD that could have broad implications in cell physiology. This rapid increase in nuclear PARylation is mediated by activation of PAR polymerase PARP-1 as a result of phosphorylation by cyclin-dependent kinase CDK2. Hormone-dependent phosphorylation of PARP-1 by CDK2, within the catalytic domain, enhances its enzymatic capabilities. Activated PARP-1 contributes to the displacement of histone H1 and is essential for regulation of the majority of hormone-responsive genes and for the effect of progestins on cell cycle progression. Both global chromatin immunoprecipitation (ChIP) coupled with deep sequencing (ChIP-seq) and gene expression analysis show a strong overlap between PARP-1 and CDK2. Thus, progestin gene regulation involves a novel signaling pathway that connects CDK2-dependent activation of PARP-1 with histone H1 displacement. Given the multiplicity of PARP targets, this new pathway could be used for the pharmacological management of breast cancer.
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31
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Inbar D, Cohen-Armon M, Neumann D. Erythropoietin-driven signalling and cell migration mediated by polyADP-ribosylation. Br J Cancer 2012; 107:1317-26. [PMID: 22955851 PMCID: PMC3494439 DOI: 10.1038/bjc.2012.395] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Background: Recombinant human erythropoietin (EPO) is the leading biotechnology engineered hormone for treatment of anaemia associated with chronic conditions including kidney failure and cancer. The finding of EPO receptors on cancer cells has raised the concern that in addition to its action in erythropoiesis, EPO may promote tumour cell growth. We questioned whether EPO-induced signalling and consequent malignant cell manifestation is mediated by polyADP-ribosylation. Methods: Erythropoietin-mediated PARP (polyADP-ribose polymerase-1) activation, gene expression and core histone H4 acetylation were examined in UT7 cells, using western blot analysis, RT–PCR and immunofluorescence. Erythropoietin-driven migration of the human breast epithelial cell line MDA-MB-435 was determined by the scratch assay and in migration chambers. Results: We have found that EPO treatment induced PARP activation. Moreover, EPO-driven c-fos and Egr-1 gene expression as well as histone H4 acetylation were mediated via polyADP-ribosylation. Erythropoietin-induced cell migration was blocked by the PARP inhibitor, ABT-888, indicating an essential role for polyADP-ribosylation in this process. Conclusions: We have identified a novel pathway by which EPO-induced gene expression and breast cancer cell migration are regulated by polyADP-ribosylation. This study introduces new possibilities regarding EPO treatment for cancer-associated anaemia where combining systemic EPO treatment with targeted administration of PARP inhibitors to the tumour may allow safe treatment with EPO, minimising its possible undesirable proliferative effects on the tumour.
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Affiliation(s)
- D Inbar
- Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel-Aviv University, Israel
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Glendenning J, Tutt A. PARP inhibitors--current status and the walk towards early breast cancer. Breast 2012; 20 Suppl 3:S12-9. [PMID: 22015278 DOI: 10.1016/s0960-9776(11)70288-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Epithelial carcinomas in general arise as a result of the acquisition of and selection for multiple mutations in a parental somatic cell clone within the tissues of the primary organ of origin. In the last two decades genome caretakers, which function in key areas of DNA damage response, have been recognized as important tumour suppressor genes. Inactivating mutations in these genes occur both as germline and/or somatic mutations with increasing evidence of epigenetic silencing as an additional cause of loss of function. In any event, loss of function in a tumour cell pre-cursor clone leads to accelerated mutation acquisition and underpins the aetiology of the tumour. With increasing understanding of the complex network that is the DNA damage response, signaling pathways already recognized to be central to the establishment of the cancer phenotype are gaining additional roles as controllers of DNA repair. This has relevance to identification of wider populations of patients with tumours susceptible to approaches that target DNA repair deficiency. These have classically been with DNA damaging chemotherapy but the recently developed small molecule inhibitors of DNA repair enzymes such as Poly-ADP polymerases PARP-1 and PARP-2 have been shown to target tumour deficiencies in DNA repair as well sensitizing to DNA damaging therapeutics such as radiation and chemotherapy. Early phase trials with efficacy endpoints have been presented for the PARP inhibitors AG014699, olaparib, veliparib, iniparib and MK4827. The results of the first phase II trials exploring monotherapy PARP inhibitor strategies, which are based on revisiting the concept of synthetic lethality, have emerged and are reviewed herein. The clinical trials that have or are exploring combinations with DNA damaging therapy in these contexts are discussed with particular reference to breast cancer, as are biomarkers that have been proposed and are being investigated to develop optimal drug schedule and patient selection criteria for these DNA repair targeting approaches.
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Affiliation(s)
- Jennifer Glendenning
- Guy's and St Thomas's Hospitals and Breakthrough Breast Cancer Research Unit Kings Health Partners AHSC, Research Oncology, 3(rd) Floor Bermondsey Wing, Guys Hospital, Great Maze Pond, London SE1 9RT, UK
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33
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Ozcelik H, Shi X, Chang MC, Tram E, Vlasschaert M, Di Nicola N, Kiselova A, Yee D, Goldman A, Dowar M, Sukhu B, Kandel R, Siminovitch K. Long-range PCR and next-generation sequencing of BRCA1 and BRCA2 in breast cancer. J Mol Diagn 2012; 14:467-75. [PMID: 22874498 DOI: 10.1016/j.jmoldx.2012.03.006] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Revised: 02/23/2012] [Accepted: 06/05/2012] [Indexed: 11/18/2022] Open
Abstract
Individuals and families carrying mutations in BRCA1 and BRCA2 (BRCA1/2) have a markedly elevated risk of developing breast and ovarian cancers. The first-generation of BRCA1/2 mutation analysis targeted only the coding exons and has implicated protein-truncating mutations (indel, nonsense) in BRCA1/2 inactivation. Recently, heritable breast cancers have also been attributed to other exonic mutations (missense, silent) and mutations in introns and untranslated regions. However, analysis of these alterations has been prohibitively laborious and cost intensive, and the proportion of cases carrying mutations in unscreened regions of BRCA1/2 and other predisposition genes is unknown. We have developed and validated a next-generation sequencing (NGS) approach for BRCA1/2 mutation analysis by applying long-range PCR and deep sequencing. Genomic DNA from familial breast cancer patients (N = 12) were screened and NGS successfully identified all 19 distinct (51 total) BRCA1 and 35 distinct (63 total) BRCA2 sequence alterations detectable by the Sanger sequencing, with no false-negative or positive results. In addition, we report the robust detection of variants from introns and untranslated regions. These results illustrate that NGS can provide comprehensive genetic information more quickly, accurately, and at a lower cost than conventional approaches, and we propose NGS to be a more effective method for BRCA1/2 mutational analysis. Advances in NGS will play an important role in enabling molecular diagnostics and personalized treatment of breast and ovarian cancers.
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Affiliation(s)
- Hilmi Ozcelik
- Fred A Litwin Centre for Cancer Genetics, Samuel Lunenfeld Research Institute, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada.
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34
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Rojo F, García-Parra J, Zazo S, Tusquets I, Ferrer-Lozano J, Menendez S, Eroles P, Chamizo C, Servitja S, Ramírez-Merino N, Lobo F, Bellosillo B, Corominas JM, Yelamos J, Serrano S, Lluch A, Rovira A, Albanell J. Nuclear PARP-1 protein overexpression is associated with poor overall survival in early breast cancer. Ann Oncol 2012; 23:1156-1164. [PMID: 21908496 DOI: 10.1093/annonc/mdr361] [Citation(s) in RCA: 124] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/06/2023] Open
Abstract
BACKGROUND Poly(ADP-ribose)polymerase-1 (PARP-1) is a highly promising novel target in breast cancer. However, the expression of PARP-1 protein in breast cancer and its associations with outcome are yet poorly characterized. PATIENTS AND METHODS Quantitative expression of PARP-1 protein was assayed by a specific immunohistochemical signal intensity scanning assay in a range of normal to malignant breast lesions, including a series of patients (N = 330) with operable breast cancer to correlate with clinicopathological factors and long-term outcome. RESULTS PARP-1 was overexpressed in about a third of ductal carcinoma in situ and infiltrating breast carcinomas. PARP-1 protein overexpression was associated to higher tumor grade (P = 0.01), estrogen-negative tumors (P < 0.001) and triple-negative phenotype (P < 0.001). The hazard ratio (HR) for death in patients with PARP-1 overexpressing tumors was 7.24 (95% CI; 3.56-14.75). In a multivariate analysis, PARP-1 overexpression was an independent prognostic factor for both disease-free (HR 10.05; 95% CI 5.42-10.66) and overall survival (HR 1.82; 95% CI 1.32-2.52). CONCLUSIONS Nuclear PARP-1 is overexpressed during the malignant transformation of the breast, particularly in triple-negative tumors, and independently predicts poor prognosis in operable invasive breast cancer.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Animals
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Breast Neoplasms/diagnosis
- Breast Neoplasms/metabolism
- Breast Neoplasms/mortality
- Breast Neoplasms/pathology
- Carcinoma, Ductal, Breast/diagnosis
- Carcinoma, Ductal, Breast/metabolism
- Carcinoma, Ductal, Breast/mortality
- Carcinoma, Ductal, Breast/pathology
- Cell Nucleus/metabolism
- Cell Nucleus/pathology
- Cells, Cultured
- Disease Progression
- Embryo, Mammalian
- Female
- Gene Expression Regulation, Neoplastic/drug effects
- Humans
- Mice
- Mice, Knockout
- Middle Aged
- Neoplasm Invasiveness
- Neoplasm Staging
- Poly (ADP-Ribose) Polymerase-1
- Poly(ADP-ribose) Polymerase Inhibitors
- Poly(ADP-ribose) Polymerases/genetics
- Poly(ADP-ribose) Polymerases/metabolism
- Prognosis
- RNA, Small Interfering/pharmacology
- Survival Analysis
- Up-Regulation/drug effects
- Up-Regulation/genetics
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Affiliation(s)
- F Rojo
- Cancer Research Program, IMIM (Hospital del Mar Research Institute), Barcelona; Department of Pathology, Hospital del Mar, Barcelona; Department of Pathology, IIS-Fundación Jiménez Díaz, Madrid
| | - J García-Parra
- Cancer Research Program, IMIM (Hospital del Mar Research Institute), Barcelona; Medical Oncology Department, Hospital del Mar, Barcelona
| | - S Zazo
- Department of Pathology, IIS-Fundación Jiménez Díaz, Madrid
| | - I Tusquets
- Medical Oncology Department, Hospital del Mar, Barcelona
| | - J Ferrer-Lozano
- Department of Oncology and Hematology, Hospital Clinico Universitario, Valencia
| | - S Menendez
- Cancer Research Program, IMIM (Hospital del Mar Research Institute), Barcelona; Medical Oncology Department, Hospital del Mar, Barcelona
| | - P Eroles
- Department of Oncology and Hematology, Hospital Clinico Universitario, Valencia
| | - C Chamizo
- Department of Pathology, IIS-Fundación Jiménez Díaz, Madrid
| | - S Servitja
- Medical Oncology Department, Hospital del Mar, Barcelona
| | | | - F Lobo
- Department of Oncology, IIS-Fundación Jiménez Díaz, Madrid
| | - B Bellosillo
- Department of Pathology, Hospital del Mar, Barcelona
| | - J M Corominas
- Cancer Research Program, IMIM (Hospital del Mar Research Institute), Barcelona; Department of Pathology, Hospital del Mar, Barcelona; Department of Medicine, Autonomous University of Barcelona, Barcelona
| | - J Yelamos
- Cancer Research Program, IMIM (Hospital del Mar Research Institute), Barcelona; Immunology Department, Hospital del Mar, Barcelona
| | - S Serrano
- Department of Pathology, Hospital del Mar, Barcelona; Department of Medicine, Autonomous University of Barcelona, Barcelona
| | - A Lluch
- Department of Oncology and Hematology, Hospital Clinico Universitario, Valencia; Department of Medicine, Valencia Central University, Valencia, Spain
| | - A Rovira
- Cancer Research Program, IMIM (Hospital del Mar Research Institute), Barcelona; Medical Oncology Department, Hospital del Mar, Barcelona
| | - J Albanell
- Cancer Research Program, IMIM (Hospital del Mar Research Institute), Barcelona; Medical Oncology Department, Hospital del Mar, Barcelona; Department of Medicine, Autonomous University of Barcelona, Barcelona.
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35
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Gangopadhyay NN, Luketich JD, Opest A, Visus C, Meyer EM, Landreneau R, Schuchert MJ. Inhibition of poly(ADP-ribose) polymerase (PARP) induces apoptosis in lung cancer cell lines. Cancer Invest 2012; 29:608-16. [PMID: 22011283 DOI: 10.3109/07357907.2011.621916] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We have tested PJ34, a potent inhibitor of poly(ADP-ribose) polymerase (PARP), against various lung cancer cell lines (Calu-6, A549, and H460) and normal human bronchial epithelial cells (HBECs). While using WST1 dye assay, lung cancer cells exhibited LD(50) values of approximately 30 μM PJ34 (72-hr assay). Molecular data showed that the effect of PJ34-induced apoptosis on lung cancer cells occurs via a caspase-dependent pathway. The present study has clearly shown that (a) PARP inhibitor can independently kill tumor cells, (b) caspase-3 has modest influence on PARP-inhibitor-mediated cancer-specific toxicity, and (c) a pan-caspase inhibitor decreases the apoptotic effect of PJ34.
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Affiliation(s)
- Nupur N Gangopadhyay
- Department of Cardiothoracic Surgery, University of Pittsburgh Cancer Institute, 15213, USA.
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36
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Zhang LY, Liu LY, Qie LL, Ling KN, Xu LH, Wang F, Fang SH, Lu YB, Hu H, Wei EQ, Zhang WP. Anti-proliferation effect of APO866 on C6 glioblastoma cells by inhibiting nicotinamide phosphoribosyltransferase. Eur J Pharmacol 2011; 674:163-70. [PMID: 22119381 DOI: 10.1016/j.ejphar.2011.11.017] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2011] [Revised: 11/01/2011] [Accepted: 11/04/2011] [Indexed: 12/16/2022]
Abstract
Nicotinamide phosphoribosyltransferase (NAMPT) is a key enzyme in the salvaging pathway for the synthesis of nicotinamide adenine dinucleotide (NAD) that is involved in cell metabolism and proliferation. NAMPT is normally absent in astrocyte but highly expressed in glioblastoma, suggesting that it may promote cell survival through synthesizing more NAD. In this report, we evaluated the effect of APO866, a potent inhibitor of NAMPT against C6 glioblastoma. We found that APO866 inhibited the growth of C6 glioblastoma cells with IC(50) in nano-molar range. APO866 depleted intracellular NAD, caused marked inhibition of ERK activation and induced G2/M cell-cycle arrest. The effects by APO866 were abrogated by nicotinamide mononucleotide (NMN), the direct product of NAMPT. Administration of U0126, an ERK1/2 inhibitor, inhibited cell growth but displayed no synergistic effect with APO866. Taken together, our results indicated that APO866 is a potent growth inhibitor against glioblastoma through targeting NAMPT.
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Affiliation(s)
- Li-Yuan Zhang
- Department of Pharmacology, Key Laboratory of Medical Neurobiology of Ministry of Health of China, Zhejiang Province Key Laboratory of Neurobiology, Zhejiang University School of Medicine, 388 Yu-Hang-Tang Rd, Hangzhou, Zhejiang 310058, China
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37
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Castiel A, Visochek L, Mittelman L, Dantzer F, Izraeli S, Cohen-Armon M. A phenanthrene derived PARP inhibitor is an extra-centrosomes de-clustering agent exclusively eradicating human cancer cells. BMC Cancer 2011; 11:412. [PMID: 21943092 PMCID: PMC3204305 DOI: 10.1186/1471-2407-11-412] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Accepted: 09/26/2011] [Indexed: 01/23/2023] Open
Abstract
Background Cells of most human cancers have supernumerary centrosomes. To enable an accurate chromosome segregation and cell division, these cells developed a yet unresolved molecular mechanism, clustering their extra centrosomes at two poles, thereby mimicking mitosis in normal cells. Failure of this bipolar centrosome clustering causes multipolar spindle structures and aberrant chromosomes segregation that prevent normal cell division and lead to 'mitotic catastrophe cell death'. Methods We used cell biology and biochemical methods, including flow cytometry, immunocytochemistry and live confocal imaging. Results We identified a phenanthrene derived PARP inhibitor, known for its activity in neuroprotection under stress conditions, which exclusively eradicated multi-centrosomal human cancer cells (mammary, colon, lung, pancreas, ovarian) while acting as extra-centrosomes de-clustering agent in mitosis. Normal human proliferating cells (endothelial, epithelial and mesenchymal cells) were not impaired. Despite acting as PARP inhibitor, the cytotoxic activity of this molecule in cancer cells was not attributed to PARP inhibition alone. Conclusion We identified a water soluble phenanthridine that exclusively targets the unique dependence of most human cancer cells on their supernumerary centrosomes bi-polar clustering for their survival. This paves the way for a new selective cancer-targeting therapy, efficient in a wide range of human cancers.
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Affiliation(s)
- Asher Castiel
- The Neufeld Cardiac Research Institute, Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel-Aviv University, 69978, Tel-Aviv, Israel
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Cetuximab augments cytotoxicity with poly (adp-ribose) polymerase inhibition in head and neck cancer. PLoS One 2011; 6:e24148. [PMID: 21912620 PMCID: PMC3166164 DOI: 10.1371/journal.pone.0024148] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Accepted: 08/05/2011] [Indexed: 11/22/2022] Open
Abstract
Overexpression of the epidermal growth factor receptor (EGFR) is a hallmark of head and neck cancers and confers increased resistance and inferior survival rates. Despite targeted agents against EGFR, such as cetuximab (C225), almost half of treated patients fail this therapy, necessitating novel therapeutic strategies. Poly (ADP-Ribose) polymerase (PARP) inhibitors (PARPi) have gained recent attention due to their unique selectivity in killing tumors with defective DNA repair. In this study, we demonstrate that C225 enhances cytotoxicity with the PARPi ABT-888 in UM-SCC1, UM-SCC6, and FaDu head and neck cancer cells. The mechanism of increased susceptibility to C225 and PARPi involves C225-mediated reduction of non-homologous end-joining (NHEJ)- and homologous recombination (HR)-mediated DNA double strand break (DSB) repair, the subsequent persistence of DNA damage, and activation of the intrinsic apoptotic pathway. By generating a DSB repair deficiency, C225 can render head and neck tumor cells susceptible to PARP inhibition. The combination of C225 and the PARPi ABT-888 can thus be an innovative treatment strategy to potentially improve outcomes in head and neck cancer patients. Furthermore, this strategy may also be feasible for other EGFR overexpressing tumors, including lung and brain cancers.
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39
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The PARP inhibitor PJ34 causes a PARP1-independent, p21 dependent mitotic arrest. DNA Repair (Amst) 2011; 10:1003-13. [PMID: 21840268 DOI: 10.1016/j.dnarep.2011.07.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Revised: 06/26/2011] [Accepted: 07/20/2011] [Indexed: 12/15/2022]
Abstract
Poly(ADP)-ribose polymerase (PARP) inhibitors modify the enzymatic activity of PARP1/2. When certain PARP inhibitors are used either alone or in combination with DNA damage agents they may cause a G2/M mitotic arrest and/or apoptosis in a susceptible genetic context. PARP1 interacts with the cell cycle checkpoint proteins Ataxia Telangectasia Mutated (ATM) and ATM and Rad3-related (ATR) and therefore may influence growth arrest cascades. The PARP inhibitor PJ34 causes a mitotic arrest by an unknown mechanism in certain cell lines, therefore we asked whether PJ34 conditionally activated the checkpoint pathways and which downstream targets were necessary for mitotic arrest. We found that PJ34 produced a concentration dependent G2/M mitotic arrest and differentially affected cell survival in cells with diverse genetic backgrounds. p53 was activated and phosphorylated at Serine15 followed by p21 gene activation through both p53-dependent and -independent pathways. The mitotic arrest was caffeine sensitive and UCN01 insensitive and did not absolutely require p53, ATM or Chk1, while p21 was necessary for maintaining the growth arrest. Significantly, by using stable knockdown cell lines, we found that neither PARP1 nor PARP2 was required for any of these effects produced by PJ34. These results raise questions and cautions for evaluating PARP inhibitor effectiveness, suggesting whether effects should be considered not only on PARP's diverse ADP-ribosylation independent protein interactions but also on homologous proteins that may be producing either overlapping or distinct effect.
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40
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Hörmann M, Mey L, Kharip Z, Hildenberg A, Nemeth K, Heidt M, Renz H, Al-Fakhri N. Vascular endothelial growth factor confers endothelial resistance to apoptosis through poly(ADP-ribose) polymerase. J Thromb Haemost 2011; 9:1391-403. [PMID: 21605336 DOI: 10.1111/j.1538-7836.2011.04368.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND Vascular endothelial growth factor (VEGF) inhibits the endothelial apoptosis that is induced by caspases during vascular remodeling; however, the underlying mechanisms have not been completely elucidated. OBJECTIVES We hypothesized that VEGF upregulates poly(ADP-ribose) polymerase-1 (PARP) as a caspase mediator, and sought to investigate the link between apoptosis inhibition by VEGF and PARP regulation in the human vasculature. METHODS Human endothelial cells (primary cells, macrovascular/microvascular lines) were incubated with 100 pg mL(-1) to 1 μg mL(-1) VEGF-A(165) in the absence or presence of PARP small interfering RNA (siRNA). Apoptosis induced by integrin inhibition was measured by flow cytometry, trypan blue exclusion, and nuclear morphology. PARP expression and activity were determined by real-time RT-PCR, Western blot, and ribosylation assay. VEGF receptors and signal transduction were analyzed by inhibitor experiments, enzyme assays, western blot, and immunofluorescence microscopy. Immunohistochemistry was applied to a vascular culture model and to 24 atherosclerotic and 10 normal human arteries. RESULTS VEGF-A(165) induced resistance to apoptosis caused by caspase activation in endothelial cells in a time-dependent manner. VEGF, but not fibroblast growth factor-2 or transforming growth factor-β, time-dependently and dose-dependently induced PARP expression and activity, involving VEGF receptor-2 colocalized with neuropilin-1 as well as the signal transduction molecules c-Jun N-terminal kinase and Akt. The antiapoptotic effect of VEGF was abrogated by PARP siRNA. The relationship between local VEGF influence and endothelial PARP expression was confirmed in human arteries and the vascular culture model. CONCLUSIONS VEGF exerts its antiapoptotic effect on the endothelium through the regulation of PARP expression. PARP has been attributed an ambiguous role in apoptosis; here, we show that PARP promotes vascular endothelial integrity in VEGF-associated processes.
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Affiliation(s)
- M Hörmann
- Institute of Laboratory Medicine and Pathobiochemistry, Molecular Diagnostics, Philipps University, Marburg, Germany
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Domagala P, Huzarski T, Lubinski J, Gugala K, Domagala W. PARP-1 expression in breast cancer including BRCA1-associated, triple negative and basal-like tumors: possible implications for PARP-1 inhibitor therapy. Breast Cancer Res Treat 2011; 127:861-9. [PMID: 21409392 DOI: 10.1007/s10549-011-1441-2] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2010] [Accepted: 03/03/2011] [Indexed: 10/18/2022]
Abstract
Despite ongoing trials of PARP inhibitors in the treatment of breast cancer (BC), the extent of poly(ADP-ribose)polymerase-1 (PARP-1) protein expression in BCs, which may influence treatment results, is not known. The purpose of this report is to assess expression of PARP-1 in BC including BRCA1-associated, triple negative (TN), and basal-like tumors. Immunohistochemistry with a PARP-1 antibody on tissue microarrays from 130 BRCA1-associated and 594 BRCA1-non-related BCs was used. The vast majority of breast carcinomas expressed high level of nuclear PARP-1 protein and a small percentage of tumors exhibited both nuclear and cytoplasmic PARP-1 expression. There was a significant difference between the mean nuclear PARP-1 quickscore in BRCA1-associated versus BRCA1-non-associated carcinomas in all tumors (P < 0.0001), in the basal-like group (P = 0.0086), TN (P = 0.0015), and non-basal-like groups (P = 0.016) but not in the non-TN group. Among BRCA1-associated BCs, low PARP-1 expression was found in 18.5% of all cases, 18.9% of basal-like and 21% of TN cancers. Among BRCA1-non-related tumors, low PARP-1 expression was found in 8.8% of all cases, 3.1% of basal-like, and 2.7% of TN cancers. PARP-1 expression is significantly associated with BRCA1 status in basal-like and TN BCs. The assessment of PARP-1 expression in tumor samples may improve the selection of BC patients for PARP inhibitor therapy.
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Affiliation(s)
- Pawel Domagala
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Polabska 4, 70-115 Szczecin, Poland
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Abstract
Cytotoxic therapy and surgery have improved outcomes for patients with gynecologic malignancies over the last twenty years, but women's cancers still account for over ten percent of cancer related deaths annually. Insights into the pathogenesis of cancer have led to the development of drugs that target molecular pathways essential to tumor survival including angiogenesis, DNA repair, and apoptosis. This review outlines several of the promising new biologically targeted drugs currently being tested to treat gynecologic malignancies.
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Affiliation(s)
- Amy R. Carroll
- Department of Gynecologic Oncology, M.D. Anderson Cancer Center, Houston, TX 77030
| | - Robert L. Coleman
- Department of Gynecologic Oncology, M.D. Anderson Cancer Center, Houston, TX 77030
- Center for RNAi and Non-Coding RNA, M.D. Anderson Cancer Center, Houston, TX, 77030
| | - Anil K. Sood
- Department of Gynecologic Oncology, M.D. Anderson Cancer Center, Houston, TX 77030
- Department of Cancer Biology, M.D. Anderson Cancer Center, Houston, TX 77030
- Center for RNAi and Non-Coding RNA, M.D. Anderson Cancer Center, Houston, TX, 77030
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PolyADP-ribosylation is required for pronuclear fusion during postfertilization in mice. PLoS One 2010; 5. [PMID: 20824066 PMCID: PMC2932744 DOI: 10.1371/journal.pone.0012526] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2010] [Accepted: 07/27/2010] [Indexed: 01/30/2023] Open
Abstract
Background During fertilization, pronuclear envelope breakdown (PNEB) is followed by the mingling of male and female genomes. Dynamic chromatin and protein rearrangements require posttranslational modification (PTM) for the postfertilization development. Methodology/Principal Findings Inhibition of poly(ADP-ribose) polymerase activity (PARylation) by either PJ-34 or 5-AIQ resulted in developmental arrest of fertilized embryos at the PNEB. PARylation inhibition affects spindle bundle formation and phosphorylation of Erk molecules of metaphase II (MII) unfertilized oocytes. We found a frequent appearance of multiple pronuclei (PN) in the PARylation-inhibited embryos, suggesting defective polymerization of tubulins. Attenuated phosphorylation of lamin A/C by PARylation was detected in the PARylation-inhibited embryos at PNEB. This was associated with sustained localization of heterodomain protein 1 (HP1) at the PN of the one-cell embryos arrested by PARylation inhibition. Conclusions/Significance Our findings indicate that PARylation is required for pronuclear fusion during postfertilization processes. These data further suggest that PARylation regulates protein dynamics essential for the beginning of mouse zygotic development. PARylation and its involving signal-pathways may represent potential targets as contraceptives.
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Krishnakumar R, Kraus WL. The PARP side of the nucleus: molecular actions, physiological outcomes, and clinical targets. Mol Cell 2010; 39:8-24. [PMID: 20603072 DOI: 10.1016/j.molcel.2010.06.017] [Citation(s) in RCA: 661] [Impact Index Per Article: 47.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2010] [Revised: 05/05/2010] [Accepted: 05/19/2010] [Indexed: 02/06/2023]
Abstract
The abundant nuclear enzyme PARP-1, a multifunctional regulator of chromatin structure, transcription, and genomic integrity, plays key roles in a wide variety of processes in the nucleus. Recent studies have begun to connect the molecular functions of PARP-1 to specific physiological and pathological outcomes, many of which can be altered by an expanding array of chemical inhibitors of PARP enzymatic activity.
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Affiliation(s)
- Raga Krishnakumar
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853, USA
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Masuda H, Masuda N, Kodama Y, Ogawa M, Karita M, Yamamura J, Tsukuda K, Doihara H, Miyoshi S, Mano M, Nakamori S, Tsujinaka T. Predictive factors for the effectiveness of neoadjuvant chemotherapy and prognosis in triple-negative breast cancer patients. Cancer Chemother Pharmacol 2010; 67:911-7. [PMID: 20593180 DOI: 10.1007/s00280-010-1371-4] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2010] [Accepted: 05/14/2010] [Indexed: 12/23/2022]
Abstract
PURPOSE Triple-negative breast cancers (TNBCs) do not derive benefit from molecular-targeted treatments such as endocrine therapy or anti-HER2 therapy because they lack those molecular targets. On the other hand, TNBCs have been shown to respond to neoadjuvant chemotherapy (NAC). In this study, we analyzed TNBC patients who were treated with NAC at Osaka National Hospital over a recent 5-year period to clarify the predictive factors for NAC and prognostic factors. PATIENTS AND METHODS Thirty-three TNBC patients underwent sequential NAC with anthracycline (FEC100: 5FU 500 mg/m(2), epirubicin 100 mg/m(2), and cyclophosphamide 500 mg/m(2)/q3w, 4 courses) and taxanes (paclitaxel 80 mg/m(2)/qw, 12 courses or docetaxel 75 mg/m(2)/q3w, 4 courses) from May 2003 to July 2008. Pre-therapeutical and surgical specimens were studied for expressions of ER, PgR, HER-2, EGFR, cytokeratin 5/6, Ki-67, p53 and androgen receptor by immunohistochemistry (IHC). We analyzed clinicopathological factors and molecular markers in regard to the response to NAC and prognosis. RESULTS Pathological complete response (pCR) was achieved in 12 TNBC patients (36%). The pCR rate in the basal-like phenotype was significantly lower than in the non-basal-like phenotype (23 vs. 64%, respectively: P = 0.02). High pre-operative expressions of Ki-67 (≥50%) and HER-2 (2+) were considered as predictive factors for a better response from NAC. Pre-operative Ki-67 expression showed a significant correlation with disease-free survival (DFS) and a lower expression of Ki-67 (<50%) after NAC was favorable for DFS among non-pCR patients. CONCLUSIONS A non-basal-like phenotype and higher expressions of Ki-67 and HER-2 (2+) were favorable factors for NAC. However, a higher expression of Ki-67 on the surgical specimen after NAC was also a poor prognostic factor.
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Affiliation(s)
- Hiroko Masuda
- Department of Surgery, National Hospital Organization Osaka National Hospital, Osaka, Japan.
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P59 Poly(ADP-ribosylation) and Chromatin assembly factor-1 influence chromatin replication and biological aggressiveness of skin and mucosal squamous cell carcinomas of the head and neck. Melanoma Res 2010. [DOI: 10.1097/01.cmr.0000382892.20350.89] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Frizzell KM, Kraus WL. PARP inhibitors and the treatment of breast cancer: beyond BRCA1/2? Breast Cancer Res 2009; 11:111. [PMID: 20017885 PMCID: PMC2815546 DOI: 10.1186/bcr2451] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Poly(ADP-ribose) polymerase (PARP) inhibitors have been explored as therapeutic agents for the treatment of hereditary breast and ovarian cancers harboring mutations in BRCA1 or BRCA2. In a new study, Inbar-Rozensal and colleagues show that phenanthridine-derived PARP inhibitors promote cell cycle arrest and cell death in breast cancer cells lacking BRCA1 and BRCA2 mutations and prevent the growth of tumors from xenografts of these cells in immunocompromised mice. These results suggest a potential broader utility of PARP-1 inhibitors in the treatment of breast cancer, although further mechanistic studies are needed.
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