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Akbaba Y, Kacı FN, Arslan ME, Göksü S, Mardinoğlu A, Türkez H. Novel tetrahydronaphthalen-1-yl-phenethyl ureas: synthesis and dual antibacterial-anticancer activities. J Enzyme Inhib Med Chem 2024; 39:2286925. [PMID: 38062550 DOI: 10.1080/14756366.2023.2286925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 11/19/2023] [Indexed: 12/18/2023] Open
Abstract
Cancer and antibiotic-resistant bacterial infections are significant global health challenges. The resistance developed in cancer treatments intensifies therapeutic difficulties. In addressing these challenges, this study synthesised a series of N,N'-dialkyl urea derivatives containing methoxy substituents on phenethylamines. Using isocyanate for the efficient synthesis yielded target products 14-18 in 73-76% returns. Subsequently, their antibacterial and anticancer potentials were assessed. Cytotoxicity tests on cancer cell lines, bacterial strains, and a healthy fibroblast line revealed promising outcomes. All derivatives demonstrated robust antibacterial activity, with MIC values ranging from 0.97 to 15.82 µM. Notably, compounds 14 and 16 were particularly effective against the HeLa cell line, while compounds 14, 15, and 17 showed significant activity against the SH-SY5Y cell line. Importantly, these compounds had reduced toxicity to healthy fibroblast cells than to cancer cells, suggesting their potential as dual-functioning agents targeting both cancer and bacterial infections.
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Affiliation(s)
- Yusuf Akbaba
- Department of Basic Sciences, Faculty of Science, Erzurum Technical University, Erzurum, Turkey
| | - Fatma Necmiye Kacı
- Department of Molecular Biology & Genetics, Faculty of Science, Erzurum Technical University, Erzurum, Turkey
- Faculty of Medicine and Health, St. James' University Hospital, University of Leeds, Leeds, UK
| | - Mehmet Enes Arslan
- Department of Molecular Biology and Genetics, Faculty of Science, Erzurum Technical University, Erzurum, Turkey
| | - Süleyman Göksü
- Department of Chemistry, Faculty of Science, Atatürk University, Erzurum, Turkey
| | - Adil Mardinoğlu
- Science for Life Laboratory, KTH-Royal Institute of Technology, Stockholm, Sweden
- Centre for Host-Microbiome Interactions, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, London, UK
| | - Hasan Türkez
- Department of Medical Biology, Faculty of Medicine, Atatürk University, Erzurum, Turkey
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Sheta YS, Sarg MT, Abdulrahman FG, Nossier ES, Husseiny EM. Novel imidazolone derivatives as potential dual inhibitors of checkpoint kinases 1 and 2: Design, synthesis, cytotoxicity evaluation, and mechanistic insights. Bioorg Chem 2024; 149:107471. [PMID: 38823311 DOI: 10.1016/j.bioorg.2024.107471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 05/03/2024] [Accepted: 05/15/2024] [Indexed: 06/03/2024]
Abstract
Applying various drug design strategies including ring variation, substituents variation, and ring fusion, two series of 2-(alkylthio)-5-(arylidene/heteroarylidene)imidazolones and imidazo[1,2-a]thieno[2,3-d]pyrimidines were designed and prepared as dual potential Chk1 and Chk2 inhibitors. The newly synthesized hybrids were screened in NCI 60 cell line panel where the most active derivatives 4b, d-f, and 6a were further estimated for their five dose antiproliferative activity against the most sensitive tumor cells including breast MCF-7 and MDA-MB-468 and non-small cell lung cancer EKVX as well as normal WI-38 cell. Noticeably, increasing the carbon chain attached to thiol moiety at C-2 of imidazolone scaffold elevated the cytotoxic activity. Hence, compounds 4e and 4f, containing S-butyl fragment, exhibited the most antiproliferative activity against the tested cells where 4f showed extremely potent selectivity toward them. As well, compound 6a, containing imidazothienopyrimidine core, exerted significant cytotoxic activity and selectivity toward the examined cells. The mechanistic investigation of the most active cytotoxic analogs was achieved through the evaluation of their inhibitory activity against Chk1 and Chk2. Results revealed that 4f displayed potent dual inhibition of both Chk1 and Chk2 with IC50 equal 0.137 and 0.25 μM, respectively. It also promoted its antiproliferative and Chk suppression activity via EKVX cell cycle arrest at S phase through stimulating the apoptotic approach. The apoptosis induction was also emphasized by elevating the expression of Caspase-3 and Bax, that are accompanied by Bcl-2 diminution. The in silico molecular docking and ADMET profiles of the most active analogs have been carried out to evaluate their potential as significant anticancer drug candidates.
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Affiliation(s)
- Yasmin S Sheta
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy (Girls), Al-Azhar University, Nasr City 11754, Cairo, Egypt
| | - Marwa T Sarg
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy (Girls), Al-Azhar University, Nasr City 11754, Cairo, Egypt
| | - Fatma G Abdulrahman
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy (Girls), Al-Azhar University, Nasr City 11754, Cairo, Egypt
| | - Eman S Nossier
- Pharmaceutical Medicinal Chemistry and Drug Design Department, Faculty of Pharmacy (Girls), Al-Azhar University, Cairo 11754, Egypt; The National Committee of Drugs, Academy of Scientific Research and Technology, Cairo 11516, Egypt
| | - Ebtehal M Husseiny
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy (Girls), Al-Azhar University, Nasr City 11754, Cairo, Egypt.
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Blanco-Luquin I, Lázcoz P, Celay J, Castresana JS, Encío IJ. In Vitro Assessment of the Role of p53 on Chemotherapy Treatments in Neuroblastoma Cell Lines. Pharmaceuticals (Basel) 2021; 14:ph14111184. [PMID: 34832966 PMCID: PMC8624165 DOI: 10.3390/ph14111184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 11/14/2021] [Accepted: 11/15/2021] [Indexed: 11/16/2022] Open
Abstract
Neuroblastoma is the most frequent malignant extracranial solid tumor of infancy. The overall objective of this work consists of determining the presence of alterations in the p53/MDM2/p14ARF signaling pathway in neuroblastoma cell lines and deciphering their possible relationship with resistance to known antineoplastic drugs and to differentiation agents. Firstly, we characterized 10 neuroblastoma cell lines for alterations at the p53/MDM2/p14ARF signaling pathway by analysis of TP53 point mutations, MYCN and MDM2 amplification, and p14ARF methylation, homozygous deletions, and expression. Secondly, we chose SK-N-FI (mutated at TP53) and SK-N-Be(2) (wild-type TP53) cell lines, treated them with chemotherapeutic agents (doxorubicin, etoposide, cisplatin, and melphalan) and with two isomers of retinoic acid (RA): (9-cis and all-trans). Finally, we analyzed the distribution of the cell cycle, the induction of apoptosis, and the expression levels of p53, p21, and Bcl-2 in those two cell lines. P14ARF did not present promoter methylation, homozygous deletions, and protein expression in any of the 10 neuroblastoma cell lines. One TP53 point mutation was detected in the SK-N-FI cell line. MYCN amplification was frequent, while most cell lines did not present MDM2 amplification. Treatment of SK-N-FI and SK-N-Be(2) cells with doxorubicin, etoposide, cisplatin, and melphalan increased apoptosis and blocked the cycle in G2/M, while retinoic acid isomers induced apoptosis and decreased the percentage of cells in S phase in TP53 mutated SK-N-FI cells, but not in TP53 wild-type SK-N-Be(2) cells. Treatment with cisplatin, melphalan, or 9-cis RA decreased p53 expression levels in SK-N-FI cells but not in SK-N-Be (2). The expression of p21 was not modified in either of the two cell lines. Bcl-2 levels were reduced only in SK-N-FI cells after treatment with cisplatin. However, treatments with doxorubicin, etoposide, or 9-cis-RA did not modify the levels of this protein in either of the two cell lines. In conclusion, TP53 mutated SK-N-FI cells respond better to the retinoic isomers than TP53 wild-type SK-N-Be(2) cells. Although these are in vitro results, it seems that deciphering the molecular alterations of the p53/MDM2/p14ARF signaling pathway prior to treating patients of neuroblastoma might be useful for standardizing therapies with the aim of improving survival.
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Affiliation(s)
- Idoia Blanco-Luquin
- Department of Health Sciences, Public University of Navarra (UPNA), IdiSNA (Navarra Institute for Health Research), 31008 Pamplona, Spain; (I.B.-L.); (P.L.); (J.C.)
| | - Paula Lázcoz
- Department of Health Sciences, Public University of Navarra (UPNA), IdiSNA (Navarra Institute for Health Research), 31008 Pamplona, Spain; (I.B.-L.); (P.L.); (J.C.)
| | - Jon Celay
- Department of Health Sciences, Public University of Navarra (UPNA), IdiSNA (Navarra Institute for Health Research), 31008 Pamplona, Spain; (I.B.-L.); (P.L.); (J.C.)
| | - Javier S. Castresana
- Department of Biochemistry and Genetics, University of Navarra School of Sciences, 31008 Pamplona, Spain
- Correspondence: (J.S.C.); (I.J.E.)
| | - Ignacio J. Encío
- Department of Health Sciences, Public University of Navarra (UPNA), IdiSNA (Navarra Institute for Health Research), 31008 Pamplona, Spain; (I.B.-L.); (P.L.); (J.C.)
- Correspondence: (J.S.C.); (I.J.E.)
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Zhang T, Sun Y, Cao J, Luo J, Wang J, Jiang Z, Huang P. Intrinsic nucleus-targeted ultra-small metal-organic framework for the type I sonodynamic treatment of orthotopic pancreatic carcinoma. J Nanobiotechnology 2021; 19:315. [PMID: 34641905 PMCID: PMC8507249 DOI: 10.1186/s12951-021-01060-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 09/26/2021] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Sonodynamic therapy (SDT) strategies exhibit a high tissue penetration depth and can achieve therapeutic efficacy by facilitating the intertumoral release of reactive oxygen species (ROS) with a short lifespan and limited diffusion capabilities. The majority of SDT systems developed to date are of the highly O2-dependent type II variety, limiting their therapeutic utility in pancreatic cancer and other hypoxic solid tumor types. RESULTS Herein, a nucleus-targeted ultra-small Ti-tetrakis(4-carboxyphenyl)porphyrin (TCPP) metal-organic framework (MOF) platform was synthesized and shown to be an effective mediator of SDT. This MOF was capable of generating large quantities of ROS in an oxygen-independent manner in response to low-intensity ultrasound (US) irradiation (0.5 W cm-2), thereby facilitating both type I and type II SDT. This approach thus holds great promise for the treatment of highly hypoxic orthotopic pancreatic carcinoma solid tumors. This Ti-TCPP MOF was able to induce in vitro cellular apoptosis by directly destroying DNA and inducing S phase cell cycle arrest following US irradiation. The prolonged circulation, high intratumoral accumulation, and nucleus-targeting attributes of these MOF preparations significantly also served to significantly inhibit orthotopic pancreatic tumor growth and prolong the survival of tumor-bearing mice following Ti-TCPP + US treatment. Moreover, this Ti-TCPP MOF was almost completely cleared from mice within 7 days of treatment, and no apparent treatment-associated toxicity was observed. CONCLUSION The nucleus-targeted ultra-small Ti-TCPP MOF developed herein represents an effective approach to the enhanced SDT treatment of tumors in response to low-intensity US irradiation.
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Affiliation(s)
- Tao Zhang
- Department of Ultrasound in Medicine, The Second Affiliated Hospital of Zhejiang University School of Medicine, No.88 Jiefang Road, Shangcheng District,, Hangzhou, 310009, People's Republic of China
- Research Center of Ultrasound in Medicine and Biomedical Engineering, The Second Affiliated Hospital of Zhejiang University School of Medicine, No.88 Jiefang Road, Shangcheng District, Hangzhou, 310009, People's Republic of China
| | - Yu Sun
- Department of Ultrasound in Medicine, The Second Affiliated Hospital of Zhejiang University School of Medicine, No.88 Jiefang Road, Shangcheng District,, Hangzhou, 310009, People's Republic of China
- Research Center of Ultrasound in Medicine and Biomedical Engineering, The Second Affiliated Hospital of Zhejiang University School of Medicine, No.88 Jiefang Road, Shangcheng District, Hangzhou, 310009, People's Republic of China
| | - Jing Cao
- Department of Ultrasound in Medicine, The Second Affiliated Hospital of Zhejiang University School of Medicine, No.88 Jiefang Road, Shangcheng District,, Hangzhou, 310009, People's Republic of China
- Research Center of Ultrasound in Medicine and Biomedical Engineering, The Second Affiliated Hospital of Zhejiang University School of Medicine, No.88 Jiefang Road, Shangcheng District, Hangzhou, 310009, People's Republic of China
| | - Jiali Luo
- Department of Ultrasound in Medicine, The Second Affiliated Hospital of Zhejiang University School of Medicine, No.88 Jiefang Road, Shangcheng District,, Hangzhou, 310009, People's Republic of China
- Research Center of Ultrasound in Medicine and Biomedical Engineering, The Second Affiliated Hospital of Zhejiang University School of Medicine, No.88 Jiefang Road, Shangcheng District, Hangzhou, 310009, People's Republic of China
| | - Jing Wang
- Department of Ultrasound in Medicine, The Second Affiliated Hospital of Zhejiang University School of Medicine, No.88 Jiefang Road, Shangcheng District,, Hangzhou, 310009, People's Republic of China
- Research Center of Ultrasound in Medicine and Biomedical Engineering, The Second Affiliated Hospital of Zhejiang University School of Medicine, No.88 Jiefang Road, Shangcheng District, Hangzhou, 310009, People's Republic of China
| | - Zhenqi Jiang
- Institute of Engineering Medicine, Beijing Institute of Technology, No. 5, South Street, Zhongguancun, Haidian District, Beijing, 100081, People's Republic of China.
| | - Pintong Huang
- Department of Ultrasound in Medicine, The Second Affiliated Hospital of Zhejiang University School of Medicine, No.88 Jiefang Road, Shangcheng District,, Hangzhou, 310009, People's Republic of China.
- Research Center of Ultrasound in Medicine and Biomedical Engineering, The Second Affiliated Hospital of Zhejiang University School of Medicine, No.88 Jiefang Road, Shangcheng District, Hangzhou, 310009, People's Republic of China.
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Inoue A, Robinson FS, Minelli R, Tomihara H, Rizi BS, Rose JL, Kodama T, Srinivasan S, Harris AL, Zuniga AM, Mullinax RA, Ma X, Seth S, Daniele JR, Peoples MD, Loponte S, Akdemir KC, Khor TO, Feng N, Roszik J, Sobieski MM, Brunell D, Stephan C, Giuliani V, Deem AK, Shingu T, Deribe YL, Menter DG, Heffernan TP, Viale A, Bristow CA, Kopetz S, Draetta GF, Genovese G, Carugo A. Sequential Administration of XPO1 and ATR Inhibitors Enhances Therapeutic Response in TP53-mutated Colorectal Cancer. Gastroenterology 2021; 161:196-210. [PMID: 33745946 PMCID: PMC8238881 DOI: 10.1053/j.gastro.2021.03.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 02/24/2021] [Accepted: 03/05/2021] [Indexed: 12/20/2022]
Abstract
BACKGROUND & AIMS Understanding the mechanisms by which tumors adapt to therapy is critical for developing effective combination therapeutic approaches to improve clinical outcomes for patients with cancer. METHODS To identify promising and clinically actionable targets for managing colorectal cancer (CRC), we conducted a patient-centered functional genomics platform that includes approximately 200 genes and paired this with a high-throughput drug screen that includes 262 compounds in four patient-derived xenografts (PDXs) from patients with CRC. RESULTS Both screening methods identified exportin 1 (XPO1) inhibitors as drivers of DNA damage-induced lethality in CRC. Molecular characterization of the cellular response to XPO1 inhibition uncovered an adaptive mechanism that limited the duration of response in TP53-mutated, but not in TP53-wild-type CRC models. Comprehensive proteomic and transcriptomic characterization revealed that the ATM/ATR-CHK1/2 axes were selectively engaged in TP53-mutant CRC cells upon XPO1 inhibitor treatment and that this response was required for adapting to therapy and escaping cell death. Administration of KPT-8602, an XPO1 inhibitor, followed by AZD-6738, an ATR inhibitor, resulted in dramatic antitumor effects and prolonged survival in TP53-mutant models of CRC. CONCLUSIONS Our findings anticipate tremendous therapeutic benefit and support the further evaluation of XPO1 inhibitors, especially in combination with DNA damage checkpoint inhibitors, to elicit an enduring clinical response in patients with CRC harboring TP53 mutations.
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Affiliation(s)
- Akira Inoue
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas; Department of Gastroenterological Surgery, Osaka General Medical Center, Osaka, Japan.
| | - Frederick S Robinson
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas; Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION) platform, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Rosalba Minelli
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION) platform, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Hideo Tomihara
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Bahar Salimian Rizi
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Johnathon L Rose
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Takahiro Kodama
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Sanjana Srinivasan
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Angela L Harris
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION) platform, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Andy M Zuniga
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION) platform, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Robert A Mullinax
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION) platform, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Xiaoyan Ma
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION) platform, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Sahil Seth
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION) platform, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Joseph R Daniele
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION) platform, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Michael D Peoples
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION) platform, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Sara Loponte
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Kadir C Akdemir
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Tin Oo Khor
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION) platform, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Ningping Feng
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION) platform, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jason Roszik
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Mary M Sobieski
- Center for Translational Cancer Research, Institute of Biosciences and Technology, Texas A&M University, Houston, Texas
| | - David Brunell
- Center for Translational Cancer Research, Institute of Biosciences and Technology, Texas A&M University, Houston, Texas
| | - Clifford Stephan
- Center for Translational Cancer Research, Institute of Biosciences and Technology, Texas A&M University, Houston, Texas
| | - Virginia Giuliani
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION) platform, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Angela K Deem
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas; Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION) platform, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Takashi Shingu
- Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Yonathan Lissanu Deribe
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - David G Menter
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Timothy P Heffernan
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION) platform, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Andrea Viale
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Christopher A Bristow
- Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION) platform, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Scott Kopetz
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Giulio F Draetta
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Giannicola Genovese
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas; Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas.
| | - Alessandro Carugo
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas; Translational Research to Advance Therapeutics and Innovation in Oncology (TRACTION) platform, The University of Texas MD Anderson Cancer Center, Houston, Texas.
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Fernandes SG, Shah P, Khattar E. Recent Advances in Therapeutic Application of DNA Damage Response Inhibitors against Cancer. Anticancer Agents Med Chem 2021; 22:469-484. [PMID: 34102988 DOI: 10.2174/1871520621666210608105735] [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] [Received: 12/09/2020] [Revised: 02/02/2021] [Accepted: 02/22/2021] [Indexed: 11/22/2022]
Abstract
DNA integrity is continuously challenged by intrinsic cellular processes and environmental agents. To overcome this genomic damage, cells have developed multiple signaling pathways collectively named as DNA damage response (DDR) and composed of three components: (i) sensor proteins, which detect DNA damage, (ii) mediators that relay the signal downstream and recruit the repair machinery, and (iii) the repair proteins, which restore the damaged DNA. A flawed DDR and failure to repair the damage lead to the accumulation of genetic lesions and increased genomic instability, which is recognized as a hallmark of cancer. Cancer cells tend to harbor increased mutations in DDR genes and often have fewer DDR pathways than normal cells. This makes cancer cells more dependent on particular DDR pathways and thus become more susceptible to compounds inhibiting those pathways compared to normal cells, which have all the DDR pathways intact. Understanding the roles of different DDR proteins in the DNA damage response and repair pathways and identification of their structures have paved the way for the development of their inhibitors as targeted cancer therapy. In this review, we describe the major participants of various DDR pathways, their significance in carcinogenesis, and focus on the inhibitors developed against several key DDR proteins.
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Affiliation(s)
- Stina George Fernandes
- Sunandan Divatia School of Science, SVKM's NMIMS (Deemed to be) University, Mumbai, India
| | - Prachi Shah
- Sunandan Divatia School of Science, SVKM's NMIMS (Deemed to be) University, Mumbai, India
| | - Ekta Khattar
- Sunandan Divatia School of Science, SVKM's NMIMS (Deemed to be) University, Mumbai, India
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Ödborn Jönsson L, Sahi M, Lopez-Lorenzo X, Keller FL, Kostopoulou ON, Herold N, Ährlund-Richter L, Shirazi Fard S. Heterogeneities in Cell Cycle Checkpoint Activation Following Doxorubicin Treatment Reveal Targetable Vulnerabilities in TP53 Mutated Ultra High-Risk Neuroblastoma Cell Lines. Int J Mol Sci 2021; 22:ijms22073664. [PMID: 33915913 PMCID: PMC8036447 DOI: 10.3390/ijms22073664] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 03/27/2021] [Accepted: 03/29/2021] [Indexed: 12/16/2022] Open
Abstract
Most chemotherapeutics target DNA integrity and thereby trigger tumour cell death through activation of DNA damage responses that are tightly coupled to the cell cycle. Disturbances in cell cycle regulation can therefore lead to treatment resistance. Here, a comprehensive analysis of cell cycle checkpoint activation following doxorubicin (doxo) treatment was performed using flow cytometry, immunofluorescence and live-cell imaging in a panel of TP53 mutated ultra high-risk neuroblastoma (NB) cell lines, SK-N-DZ, Kelly, SK-N-AS, SK-N-FI, and BE(2)-C. Following treatment, a dose-dependent accumulation in either S- and/or G2/M-phase was observed. This coincided with a heterogeneous increase of cell cycle checkpoint proteins, i.e., phos-ATM, phos-CHK1, phos-CHK2, Wee1, p21Cip1/Waf1, and p27Kip among the cell lines. Combination treatment with doxo and a small-molecule inhibitor of ATM showed a delay in regrowth in SK-N-DZ, of CHK1 in BE(2)-C, of Wee1 in SK-N-FI and BE(2)-C, and of p21 in Kelly and BE(2)-C. Further investigation revealed, in all tested cell lines, a subset of cells arrested in mitosis, indicating independence on the intra-S- and/or G2/M-checkpoints. Taken together, we mapped distinct cell cycle checkpoints in ultra high-risk NB cell lines and identified checkpoint dependent and independent druggable targets.
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Affiliation(s)
- Linnéa Ödborn Jönsson
- Department of Women’s and Children’s Health, Karolinska Institutet, 171 64 Stockholm, Sweden; (L.Ö.J.); (M.S.); (X.L.-L.); (F.L.K.); (N.H.); (L.Ä.-R.)
| | - Maryam Sahi
- Department of Women’s and Children’s Health, Karolinska Institutet, 171 64 Stockholm, Sweden; (L.Ö.J.); (M.S.); (X.L.-L.); (F.L.K.); (N.H.); (L.Ä.-R.)
| | - Ximena Lopez-Lorenzo
- Department of Women’s and Children’s Health, Karolinska Institutet, 171 64 Stockholm, Sweden; (L.Ö.J.); (M.S.); (X.L.-L.); (F.L.K.); (N.H.); (L.Ä.-R.)
| | - Faye Leilah Keller
- Department of Women’s and Children’s Health, Karolinska Institutet, 171 64 Stockholm, Sweden; (L.Ö.J.); (M.S.); (X.L.-L.); (F.L.K.); (N.H.); (L.Ä.-R.)
| | | | - Nikolas Herold
- Department of Women’s and Children’s Health, Karolinska Institutet, 171 64 Stockholm, Sweden; (L.Ö.J.); (M.S.); (X.L.-L.); (F.L.K.); (N.H.); (L.Ä.-R.)
- Pediatric Oncology, Astrid Lindgren Children’s Hospital, Karolinska University Hospital Solna, 171 64 Stockholm, Sweden
| | - Lars Ährlund-Richter
- Department of Women’s and Children’s Health, Karolinska Institutet, 171 64 Stockholm, Sweden; (L.Ö.J.); (M.S.); (X.L.-L.); (F.L.K.); (N.H.); (L.Ä.-R.)
| | - Shahrzad Shirazi Fard
- Department of Women’s and Children’s Health, Karolinska Institutet, 171 64 Stockholm, Sweden; (L.Ö.J.); (M.S.); (X.L.-L.); (F.L.K.); (N.H.); (L.Ä.-R.)
- Correspondence:
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8
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Abstract
DNA damage response (DDR) pathway prevents high level endogenous and environmental DNA damage being replicated and passed on to the next generation of cells via an orchestrated and integrated network of cell cycle checkpoint signalling and DNA repair pathways. Depending on the type of damage, and where in the cell cycle it occurs different pathways are involved, with the ATM-CHK2-p53 pathway controlling the G1 checkpoint or ATR-CHK1-Wee1 pathway controlling the S and G2/M checkpoints. Loss of G1 checkpoint control is common in cancer through TP53, ATM mutations, Rb loss or cyclin E overexpression, providing a stronger rationale for targeting the S/G2 checkpoints. This review will focus on the ATM-CHK2-p53-p21 pathway and the ATR-CHK1-WEE1 pathway and ongoing efforts to target these pathways for patient benefit.
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Southgate HED, Chen L, Curtin NJ, Tweddle DA. Targeting the DNA Damage Response for the Treatment of High Risk Neuroblastoma. Front Oncol 2020; 10:371. [PMID: 32309213 PMCID: PMC7145987 DOI: 10.3389/fonc.2020.00371] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 03/03/2020] [Indexed: 12/14/2022] Open
Abstract
Despite intensive multimodal therapy, the survival rate for high risk neuroblastoma (HR-NB) remains <50%. Most cases initially respond to treatment but almost half will subsequently relapse with aggressive treatment resistant disease. Novel treatments exploiting the molecular pathology of NB and/or overcoming resistance to current genotoxic therapies are needed before survival rates can significantly improve. DNA damage response (DDR) defects are frequently observed in HR-NB including allelic deletion and loss of function mutations in key DDR genes, oncogene induced replication stress and cell cycle checkpoint dysfunction. Exploiting defects in the DDR has been a successful treatment strategy in some adult cancers. Here we review the genetic features of HR-NB which lead to DDR defects and the emerging molecular targeting agents to exploit them.
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Affiliation(s)
- Harriet E D Southgate
- Wolfson Childhood Cancer Research Centre, Newcastle University Centre for Cancer, Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Lindi Chen
- Wolfson Childhood Cancer Research Centre, Newcastle University Centre for Cancer, Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Nicola J Curtin
- Newcastle University Centre for Cancer, Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Deborah A Tweddle
- Wolfson Childhood Cancer Research Centre, Newcastle University Centre for Cancer, Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
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10
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Co-Inhibition of the DNA Damage Response and CHK1 Enhances Apoptosis of Neuroblastoma Cells. Int J Mol Sci 2019; 20:ijms20153700. [PMID: 31362335 PMCID: PMC6696225 DOI: 10.3390/ijms20153700] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 07/22/2019] [Accepted: 07/23/2019] [Indexed: 01/25/2023] Open
Abstract
Checkpoint kinase 1 (CHK1) is a central mediator of the DNA damage response (DDR) at the S and G2/M cell cycle checkpoints, and plays a crucial role in preserving genomic integrity. CHK1 overexpression is thought to contribute to cancer aggressiveness, and several selective inhibitors of this kinase are in clinical development for various cancers, including neuroblastoma (NB). Here, we examined the sensitivity of MYCN-amplified NB cell lines to the CHK1 inhibitor PF-477736 and explored mechanisms to increase its efficacy. PF-477736 treatment of two sensitive NB cell lines, SMS-SAN and CHP134, increased the expression of two pro-apoptotic proteins, BAX and PUMA, providing a mechanism for the effect of the CHK1 inhibitor. In contrast, in NB-39-nu and SK-N-BE cell lines, PF-477736 induced DNA double-strand breaks and activated the ataxia telangiectasia mutated serine/threonine kinase (ATM)-p53-p21 axis of the DDR pathway, which rendered the cells relatively insensitive to the antiproliferative effects of the CHK1 inhibitor. Interestingly, combined treatment with PF-477736 and the ATM inhibitor Ku55933 overcame the insensitivity of NB-39-nu and SK-N-BE cells to CHK1 inhibition and induced mitotic cell death. Similarly, co-treatment with PF-477736 and NU7441, a pharmacological inhibitor of DNA-PK, which is also essential for the DDR pathway, rendered the cells sensitive to CHK1 inhibition. Taken together, our results suggest that synthetic lethality between inhibitors of CHK1 and the DDR drives G2/M checkpoint abrogation and could be a novel potential therapeutic strategy for NB.
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11
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Wang JN, Che Y, Yuan ZY, Lu ZL, Li Y, Zhang ZR, Li N, Li RD, Wan J, Sun HD, Sun N, Puno PT, He J. Acetyl-macrocalin B suppresses tumor growth in esophageal squamous cell carcinoma and exhibits synergistic anti-cancer effects with the Chk1/2 inhibitor AZD7762. Toxicol Appl Pharmacol 2019; 365:71-83. [PMID: 30633885 DOI: 10.1016/j.taap.2019.01.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 01/04/2019] [Accepted: 01/04/2019] [Indexed: 11/17/2022]
Abstract
Natural products derived from herbal medicines have become a major focus of anti-cancer drug discovery studies. Acetyl-macrocalin B (A-macB) is an ent-diterpenoid isolated from Isodon silvatica. This study aimed to examine the effect and molecular action of A-macB in esophageal squamous cell carcinoma (ESCC) and explore possible drug synergistic modalities. A-macB induced cellular reactive oxygen species (ROS) generation, initiated the p38 mitogen-activated protein kinase (MAPK) signaling pathway, and triggered the caspase-9-dependent apoptosis cascade in ESCC cells. The ROS scavenger N-acetylcysteine (NAC) and the specific p38 inhibitor SB203580 reversed the effects of A-macB on the p38 network and thus rescued ESCC cells from apoptosis. The cellular ROS increase was at least partially due to the suppression of glutathione-S-transferase P1 (GSTP1) by A-macB. A-macB also upregulated the Chk1/Chk2-Cdc25C/Cdc2/Cyclin B1 axis to induce G2/M phase arrest. The cell growth inhibition induced by A-macB was further enhanced by AZD7762, a specific Chk1/Chk2 inhibitor, with a combination index (CI) of <1. Moreover, A-macB efficiently suppressed xenograft growth without inducing significant toxicity, and AZD7762 potentiated the effects of A-macB in the suppression of tumor growth in vivo. Taken together, A-macB is a promising lead compound for ESCC and exerts synergistic anti-cancer effects with AZD7762.
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Affiliation(s)
- Jing-Nan Wang
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Yun Che
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Zu-Yang Yuan
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Zhi-Liang Lu
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Yuan Li
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Zhi-Rong Zhang
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Ning Li
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Ren-Da Li
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Jun Wan
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, China
| | - Han-Dong Sun
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, China
| | - Nan Sun
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China.
| | - Pema-Tenzin Puno
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, China.
| | - Jie He
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China.
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12
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Lowery CD, Dowless M, Renschler M, Blosser W, VanWye AB, Stephens JR, Iversen PW, Lin AB, Beckmann RP, Krytska K, Cole KA, Maris JM, Hawkins DS, Rubin BP, Kurmasheva RT, Houghton PJ, Gorlick R, Kolb EA, Kang MH, Reynolds CP, Erickson SW, Teicher BA, Smith MA, Stancato LF. Broad Spectrum Activity of the Checkpoint Kinase 1 Inhibitor Prexasertib as a Single Agent or Chemopotentiator Across a Range of Preclinical Pediatric Tumor Models. Clin Cancer Res 2018; 25:2278-2289. [PMID: 30563935 DOI: 10.1158/1078-0432.ccr-18-2728] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 11/13/2018] [Accepted: 12/14/2018] [Indexed: 12/21/2022]
Abstract
PURPOSE Checkpoint kinase 1 (CHK1) inhibitors potentiate the DNA-damaging effects of cytotoxic therapies and/or promote elevated levels of replication stress, leading to tumor cell death. Prexasertib (LY2606368) is a CHK1 small-molecule inhibitor under clinical evaluation in multiple adult and pediatric cancers. In this study, prexasertib was tested in a large panel of preclinical models of pediatric solid malignancies alone or in combination with chemotherapy. EXPERIMENTAL DESIGN DNA damage and changes in cell signaling following in vitro prexasertib treatment in pediatric sarcoma cell lines were analyzed by Western blot and high content imaging. Antitumor activity of prexasertib as a single agent or in combination with different chemotherapies was explored in cell line-derived (CDX) and patient-derived xenograft (PDX) mouse models representing nine different pediatric cancer histologies. RESULTS Pediatric sarcoma cell lines were highly sensitive to prexasertib treatment in vitro, resulting in activation of the DNA damage response. Two PDX models of desmoplastic small round cell tumor and one malignant rhabdoid tumor CDX model responded to prexasertib with complete regression. Prexasertib monotherapy also elicited robust responses in mouse models of rhabdomyosarcoma. Concurrent administration with chemotherapy was sufficient to overcome innate resistance or prevent acquired resistance to prexasertib in preclinical models of neuroblastoma, osteosarcoma, and Ewing sarcoma, or alveolar rhabdomyosarcoma, respectively. CONCLUSIONS Prexasertib has significant antitumor effects as a monotherapy or in combination with chemotherapy in multiple preclinical models of pediatric cancer. These findings support further investigation of prexasertib in pediatric malignancies.
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Affiliation(s)
- Caitlin D Lowery
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | - Michele Dowless
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | - Matthew Renschler
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | - Wayne Blosser
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | - Alle B VanWye
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | | | - Philip W Iversen
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | - Aimee Bence Lin
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | | | - Kateryna Krytska
- The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Kristina A Cole
- The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - John M Maris
- The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Douglas S Hawkins
- Division of Hematology/Oncology, Seattle Children's Hospital, Seattle, Washington
| | - Brian P Rubin
- Departments of Pathology and Cancer Biology, Robert J Tomsich Pathology and Laboratory Medicine Institute and Cleveland Clinic, Cleveland, Ohio
| | | | - Peter J Houghton
- Greehey Children's Cancer Research Institute, San Antonio, Texas
| | | | - E Anders Kolb
- Nemours Center for Cancer and Blood Disorders, Wilmington, Delaware
| | - Min H Kang
- Texas Tech University Health Sciences Center, Lubbock, Texas
| | | | | | | | | | - Louis F Stancato
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana.
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13
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Prince EW, Balakrishnan I, Shah M, Mulcahy Levy JM, Griesinger AM, Alimova I, Harris PS, Birks DK, Donson AM, Davidson N, Remke M, Taylor MD, Handler MH, Foreman NK, Venkataraman S, Vibhakar R. Checkpoint kinase 1 expression is an adverse prognostic marker and therapeutic target in MYC-driven medulloblastoma. Oncotarget 2018; 7:53881-53894. [PMID: 27449089 PMCID: PMC5288228 DOI: 10.18632/oncotarget.10692] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 07/05/2016] [Indexed: 12/01/2022] Open
Abstract
Checkpoint kinase 1 (CHK1) is an integral component of the cell cycle as well as the DNA Damage Response (DDR) pathway. Previous work has demonstrated the effectiveness of inhibiting CHK1 with small-molecule inhibitors, but the role of CHK1 mediated DDR in medulloblastoma is unknown. CHK1, both at the mRNA and protein level, is highly expressed in medulloblastoma and elevated CHK1 expression in Group3 medulloblastoma is an adverse prognostic marker. CHK1 inhibition with the small-molecule drug AZD7762, results in decreased cell growth, increased DNA damage and cell apoptosis. Furthermore, AZD7762 acts in synergy with cisplatin in reducing cell proliferation in medulloblastoma. Similar phenotypic changes were observed with another CHK1 inhibitor, PF477736, as well as genetic knockdown using siRNA against CHK1. Treatments with small-molecule inhibitors of CHK1 profoundly modulated the expression of both upstream and downstream target proteins within the CHK1 signaling pathways. This suggests the presence of a feedback loop in activating CHK1. Overall, our results demonstrate that small-molecule inhibition of CHK1 in combination with, cisplatin, is more advantageous than either treatment alone, especially for Group 3 medulloblastoma, and therefore this combined therapeutic approach serves as an avenue for further investigation.
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Affiliation(s)
- Eric W Prince
- Department of Pediatrics and Section of Pediatric Hematology/Oncology/BMT, Children's Hospital Colorado and University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, United States
| | - Ilango Balakrishnan
- Department of Pediatrics and Section of Pediatric Hematology/Oncology/BMT, Children's Hospital Colorado and University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, United States
| | - Monil Shah
- University of Colorado School of Medicine, Aurora, CO, United States
| | - Jean M Mulcahy Levy
- Department of Pediatrics and Section of Pediatric Hematology/Oncology/BMT, Children's Hospital Colorado and University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, United States
| | - Andrea M Griesinger
- Department of Pediatrics and Section of Pediatric Hematology/Oncology/BMT, Children's Hospital Colorado and University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, United States
| | - Irina Alimova
- Department of Pediatrics and Section of Pediatric Hematology/Oncology/BMT, Children's Hospital Colorado and University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, United States
| | - Peter S Harris
- Department of Pediatrics and Section of Pediatric Hematology/Oncology/BMT, Children's Hospital Colorado and University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, United States
| | - Diane K Birks
- Division of Pediatric Neurosurgery, Children's Hospital Colorado and University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, United States
| | - Andrew M Donson
- Department of Pediatrics and Section of Pediatric Hematology/Oncology/BMT, Children's Hospital Colorado and University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, United States
| | - Nathan Davidson
- Department of Pediatrics and Section of Pediatric Hematology/Oncology/BMT, Children's Hospital Colorado and University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, United States
| | - Marc Remke
- DKFZ German Cancer Research Center, University Hospital Düsseldorf, Heidelberg, Germany
| | - Michael D Taylor
- Division of Neurosurgery, Program in Developmental and Stem Cell Biology, Hospital for Sick Children, Toronto, ON, Canada
| | - Michael H Handler
- Division of Pediatric Neurosurgery, Children's Hospital Colorado and University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, United States
| | - Nicholas K Foreman
- Department of Pediatrics and Section of Pediatric Hematology/Oncology/BMT, Children's Hospital Colorado and University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, United States.,University of Colorado School of Medicine, Aurora, CO, United States.,Division of Pediatric Neurosurgery, Children's Hospital Colorado and University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, United States
| | - Sujatha Venkataraman
- Department of Pediatrics and Section of Pediatric Hematology/Oncology/BMT, Children's Hospital Colorado and University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, United States
| | - Rajeev Vibhakar
- Department of Pediatrics and Section of Pediatric Hematology/Oncology/BMT, Children's Hospital Colorado and University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, United States.,University of Colorado School of Medicine, Aurora, CO, United States.,Division of Pediatric Neurosurgery, Children's Hospital Colorado and University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, United States
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14
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Galal SA, Khairat SHM, Ali HI, Shouman SA, Attia YM, Ali MM, Mahmoud AE, Abdel-Halim AH, Fyiad AA, Tabll A, El-Shenawy R, El Abd YS, Ramdan R, El Diwani HI. Part II: New candidates of pyrazole-benzimidazole conjugates as checkpoint kinase 2 (Chk2) inhibitors. Eur J Med Chem 2018; 144:859-873. [PMID: 29316526 DOI: 10.1016/j.ejmech.2017.12.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Revised: 10/12/2017] [Accepted: 12/06/2017] [Indexed: 02/07/2023]
Abstract
The development of checkpoint kinase 2 (Chk2) inhibitors for the treatment of cancer has been an ongoing and attractive objective in drug discovery. In this study, twenty-one feasible pyrazole-benzimidazole conjugates were synthesized to study their effect against Chk2 activity using Checkpoint Kinase Assay. The antitumor activity of these compounds was investigated using SRB assay. A potentiation effect of the synthesized Chk2 inhibitors was also investigated using the genotoxic anticancer drugs cisplatin and doxorubicin on breast carcinoma, (ER+) cell line (MCF-7). In vivo Chk2 and antitumor activities of 8d as a single-agent, and in combination with doxorubicin, were evaluated in breast cancer bearing animals induced by N-methylnitrosourea. The effect of 8d alone and in combination with doxorubicin was also studied on cell-cycle phases of MCF-7 cells using flow cytometry analysis. The results revealed their potencies as Chk2 inhibitors with IC50 ranges from 9.95 to 65.07 nM. Generally the effect of cisplatin or doxorubicin was potentiated by the effect of most of the compounds that were studied. The in vivo results indicated that the combination of 8d and doxorubicin inhibited checkpoint kinase activity more than either doxorubicin or 8d alone. There was a positive correlation between checkpoint kinase inhibition and the improvement observed in histopathological features. Single dose treatment with doxorubicin or 8d produced S phase cell cycle arrest whereas their combination created cell cycle arrest at G2/M from 8% in case of doxorubicin to 51% in combination. Gold molecular modelling studies displayed a high correlation to the biological results.
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Affiliation(s)
- Shadia A Galal
- Department of Chemistry of Natural and Microbial Products, Division of Pharmaceutical and Drug Industries, National Research Centre, Cairo, 12622, Egypt.
| | - Sarah H M Khairat
- Department of Chemistry of Natural and Microbial Products, Division of Pharmaceutical and Drug Industries, National Research Centre, Cairo, 12622, Egypt
| | - Hamed I Ali
- Department of Pharmaceutical Sciences, Texas A&M University Irma Lerma Rangel College of Pharmacy Kingsville, TX 78363, United States; Department of Pharmaceutical Chemistry, College of Pharmacy, Helwan University, Cairo, Egypt
| | - Samia A Shouman
- Department of Cancer Biology, National Cancer Institute, Cairo University, Egypt
| | - Yasmin M Attia
- Department of Cancer Biology, National Cancer Institute, Cairo University, Egypt
| | - Mamdouh M Ali
- Department of Biochemistry, Division of Genetic Engineering and Biotechnology, National Research Centre, 12622, Cairo, Egypt
| | - Abeer E Mahmoud
- Department of Biochemistry, Division of Genetic Engineering and Biotechnology, National Research Centre, 12622, Cairo, Egypt
| | - Abeer H Abdel-Halim
- Department of Biochemistry, Division of Genetic Engineering and Biotechnology, National Research Centre, 12622, Cairo, Egypt
| | - Amal A Fyiad
- Department of Biochemistry, Division of Genetic Engineering and Biotechnology, National Research Centre, 12622, Cairo, Egypt
| | - Ashraf Tabll
- Department of Microbial Biotechnology, Division of Genetic Engineering & Biotechnology, National Research Centre, 12622, Cairo, Egypt
| | - Reem El-Shenawy
- Department of Microbial Biotechnology, Division of Genetic Engineering & Biotechnology, National Research Centre, 12622, Cairo, Egypt
| | - Yasmine S El Abd
- Department of Microbial Biotechnology, Division of Genetic Engineering & Biotechnology, National Research Centre, 12622, Cairo, Egypt
| | - Raghda Ramdan
- Radiobiology Unit, Belgian Nuclear Research Center (SCK•CEN), Mol, Belgium; Department of Basic Medical Sciences, Physiology Group, Ghent University, Ghent, Belgium
| | - Hoda I El Diwani
- Department of Chemistry of Natural and Microbial Products, Division of Pharmaceutical and Drug Industries, National Research Centre, Cairo, 12622, Egypt
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15
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Gadhikar MA, Zhang J, Shen L, Rao X, Wang J, Zhao M, Kalu NN, Johnson FM, Byers LA, Heymach J, Hittelman WN, Udayakumar D, Pandita RK, Pandita TK, Pickering CR, Redwood AB, Piwnica-Worms H, Schlacher K, Frederick MJ, Myers JN. CDKN2A/p16 Deletion in Head and Neck Cancer Cells Is Associated with CDK2 Activation, Replication Stress, and Vulnerability to CHK1 Inhibition. Cancer Res 2017; 78:781-797. [PMID: 29229598 DOI: 10.1158/0008-5472.can-17-2802] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 11/30/2017] [Accepted: 11/30/2017] [Indexed: 11/16/2022]
Abstract
Checkpoint kinase inhibitors (CHKi) exhibit striking single-agent activity in certain tumors, but the mechanisms accounting for hypersensitivity are poorly understood. We screened a panel of 49 established human head and neck squamous cell carcinoma (HNSCC) cell lines and report that nearly 20% are hypersensitive to CHKi monotherapy. Hypersensitive cells underwent early S-phase arrest at drug doses sufficient to inhibit greater than 90% of CHK1 activity. Reduced rate of DNA replication fork progression and chromosomal shattering were also observed, suggesting replication stress as a root causative factor in CHKi hypersensitivity. To explore genomic underpinnings of CHKi hypersensitivity, comparative genomic analysis was performed between hypersensitive cells and cells categorized as least sensitive because they showed drug IC50 value greater than the cell panel median and lacked early S-phase arrest. Novel association between CDKN2A/p16 copy number loss, CDK2 activation, replication stress, and hypersensitivity of HNSCC cells to CHKi monotherapy was found. Restoring p16 in cell lines harboring CDKN2A/p16 genomic deletions alleviated CDK2 activation and replication stress, attenuating CHKi hypersensitivity. Taken together, our results suggest a biomarker-driven strategy for selecting HNSCC patients who may benefit the most from CHKi therapy.Significance: These results suggest a biomarker-driven strategy for selecting HNSCC patients who may benefit the most from therapy with CHK inhibitors. Cancer Res; 78(3); 781-97. ©2017 AACR.
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Affiliation(s)
- Mayur A Gadhikar
- Department of Head and Neck Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jiexin Zhang
- Department of Biostatistics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Li Shen
- Department of Biostatistics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Xiayu Rao
- Department of Biostatistics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jing Wang
- Department of Biostatistics and Computational Biology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Mei Zhao
- Department of Head and Neck Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Nene N Kalu
- Thoracic Head and Neck Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Faye M Johnson
- Thoracic Head and Neck Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Lauren A Byers
- Thoracic Head and Neck Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - John Heymach
- Thoracic Head and Neck Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Walter N Hittelman
- Department of Experimental Therapeutics, University of Texas, MD Anderson Cancer Center, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Durga Udayakumar
- Department of Radiation Oncology, Institute for Academic Medicine, Houston Methodist, Houston, Texas
| | - Raj K Pandita
- Department of Radiation Oncology, Institute for Academic Medicine, Houston Methodist, Houston, Texas
| | - Tej K Pandita
- Department of Radiation Oncology, Institute for Academic Medicine, Houston Methodist, Houston, Texas
| | - Curtis R Pickering
- Department of Head and Neck Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Abena B Redwood
- Department of Experimental Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Helen Piwnica-Worms
- Department of Experimental Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Katharina Schlacher
- Department of Cancer Biology, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Mitchell J Frederick
- Department of Otolaryngology - Head and Neck Surgery, Baylor College of Medicine, Houston, Texas.
| | - Jeffrey N Myers
- Department of Head and Neck Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas.
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16
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Targeting the ATR-CHK1 Axis in Cancer Therapy. Cancers (Basel) 2017; 9:cancers9050041. [PMID: 28448462 PMCID: PMC5447951 DOI: 10.3390/cancers9050041] [Citation(s) in RCA: 141] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 04/23/2017] [Accepted: 04/25/2017] [Indexed: 12/14/2022] Open
Abstract
Targeting the DNA damage response (DDR) is a new therapeutic approach in cancer that shows great promise for tumour selectivity. Key components of the DDR are the ataxia telangiectasia mutated and Rad3 related (ATR) and checkpoint kinase 1 (CHK1) kinases. This review article describes the role of ATR and its major downstream target, CHK1, in the DDR and why cancer cells are particularly reliant on the ATR-CHK1 pathway, providing the rationale for targeting these kinases, and validation of this hypothesis by genetic manipulation. The recent development of specific inhibitors and preclinical data using these inhibitors not only as chemosensitisers and radiosensitisers but also as single agents to exploit specific pathologies of tumour cells is described. These potent and specific inhibitors have now entered clinical trial and early results are presented.
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17
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Lowery CD, VanWye AB, Dowless M, Blosser W, Falcon BL, Stewart J, Stephens J, Beckmann RP, Bence Lin A, Stancato LF. The Checkpoint Kinase 1 Inhibitor Prexasertib Induces Regression of Preclinical Models of Human Neuroblastoma. Clin Cancer Res 2017; 23:4354-4363. [PMID: 28270495 DOI: 10.1158/1078-0432.ccr-16-2876] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 12/13/2016] [Accepted: 03/02/2017] [Indexed: 11/16/2022]
Abstract
Purpose: Checkpoint kinase 1 (CHK1) is a key regulator of the DNA damage response and a mediator of replication stress through modulation of replication fork licensing and activation of S and G2-M cell-cycle checkpoints. We evaluated prexasertib (LY2606368), a small-molecule CHK1 inhibitor currently in clinical testing, in multiple preclinical models of pediatric cancer. Following an initial assessment of prexasertib activity, this study focused on the preclinical models of neuroblastoma.Experimental Design: We evaluated the antiproliferative activity of prexasertib in a panel of cancer cell lines; neuroblastoma cell lines were among the most sensitive. Subsequent Western blot and immunofluorescence analyses measured DNA damage and DNA repair protein activation. Prexasertib was investigated in several cell line-derived xenograft mouse models of neuroblastoma.Results: Within 24 hours, single-agent prexasertib promoted γH2AX-positive double-strand DNA breaks and phosphorylation of DNA damage sensors ATM and DNA-PKcs, leading to neuroblastoma cell death. Knockdown of CHK1 and/or CHK2 by siRNA verified that the double-strand DNA breaks and cell death elicited by prexasertib were due to specific CHK1 inhibition. Neuroblastoma xenografts rapidly regressed following prexasertib administration, independent of starting tumor volume. Decreased Ki67 and increased immunostaining of endothelial and pericyte markers were observed in xenografts after only 6 days of exposure to prexasertib, potentially indicating a swift reduction in tumor volume and/or a direct effect on tumor vasculature.Conclusions: Overall, these data demonstrate that prexasertib is a specific inhibitor of CHK1 in neuroblastoma and leads to DNA damage and cell death in preclinical models of this devastating pediatric malignancy. Clin Cancer Res; 23(15); 4354-63. ©2017 AACR.
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Affiliation(s)
- Caitlin D Lowery
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | - Alle B VanWye
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | - Michele Dowless
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | - Wayne Blosser
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | - Beverly L Falcon
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | - Julie Stewart
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | - Jennifer Stephens
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | | | - Aimee Bence Lin
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana
| | - Louis F Stancato
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana.
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18
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Soriano A, París-Coderch L, Jubierre L, Martínez A, Zhou X, Piskareva O, Bray I, Vidal I, Almazán-Moga A, Molist C, Roma J, Bayascas JR, Casanovas O, Stallings RL, Sánchez de Toledo J, Gallego S, Segura MF. MicroRNA-497 impairs the growth of chemoresistant neuroblastoma cells by targeting cell cycle, survival and vascular permeability genes. Oncotarget 2017; 7:9271-87. [PMID: 26824183 PMCID: PMC4891039 DOI: 10.18632/oncotarget.7005] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 01/01/2016] [Indexed: 01/24/2023] Open
Abstract
Despite multimodal therapies, a high percentage of high-risk neuroblastoma (NB) become refractory to current treatments, most of which interfere with cell cycle and DNA synthesis or function, activating the DNA damage response (DDR). In cancer, this process is frequently altered by deregulated expression or function of several genes which contribute to multidrug resistance (MDR). MicroRNAs are outstanding candidates for therapy since a single microRNA can modulate the expression of multiple genes of the same or different pathways, thus hindering the development of resistance mechanisms by the tumor. We found several genes implicated in the MDR to be overexpressed in high-risk NB which could be targeted by microRNAs simultaneously. Our functional screening identified several of those microRNAs that reduced proliferation of chemoresistant NB cell lines, the best of which was miR-497. Low expression of miR-497 correlated with poor patient outcome. The overexpression of miR-497 reduced the proliferation of multiple chemoresistant NB cell lines and induced apoptosis in MYCN-amplified cell lines. Moreover, the conditional expression of miR-497 in NB xenografts reduced tumor growth and inhibited vascular permeabilization. MiR-497 targets multiple genes related to the DDR, cell cycle, survival and angiogenesis, which renders this molecule a promising candidate for NB therapy.
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Affiliation(s)
- Aroa Soriano
- Laboratory of Translational Research in Child and Adolescent Cancer, Vall d'Hebron Research Institute (VHIR)-UAB, Barcelona, Spain
| | - Laia París-Coderch
- Laboratory of Translational Research in Child and Adolescent Cancer, Vall d'Hebron Research Institute (VHIR)-UAB, Barcelona, Spain
| | - Luz Jubierre
- Laboratory of Translational Research in Child and Adolescent Cancer, Vall d'Hebron Research Institute (VHIR)-UAB, Barcelona, Spain
| | - Alba Martínez
- Tumor Angiogenesis Group, Catalan Institute of Oncology-IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Xiangyu Zhou
- Institut de Neurociències and Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Olga Piskareva
- Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland and National Children's Research Centre Our Lady's Children's Hospital, Dublin, Ireland
| | - Isabella Bray
- Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland and National Children's Research Centre Our Lady's Children's Hospital, Dublin, Ireland
| | - Isaac Vidal
- Laboratory of Translational Research in Child and Adolescent Cancer, Vall d'Hebron Research Institute (VHIR)-UAB, Barcelona, Spain
| | - Ana Almazán-Moga
- Laboratory of Translational Research in Child and Adolescent Cancer, Vall d'Hebron Research Institute (VHIR)-UAB, Barcelona, Spain
| | - Carla Molist
- Laboratory of Translational Research in Child and Adolescent Cancer, Vall d'Hebron Research Institute (VHIR)-UAB, Barcelona, Spain
| | - Josep Roma
- Laboratory of Translational Research in Child and Adolescent Cancer, Vall d'Hebron Research Institute (VHIR)-UAB, Barcelona, Spain
| | - José R Bayascas
- Institut de Neurociències and Departament de Bioquímica i Biologia Molecular, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Oriol Casanovas
- Tumor Angiogenesis Group, Catalan Institute of Oncology-IDIBELL, L'Hospitalet de Llobregat, Barcelona, Spain
| | - Raymond L Stallings
- Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland and National Children's Research Centre Our Lady's Children's Hospital, Dublin, Ireland
| | - José Sánchez de Toledo
- Laboratory of Translational Research in Child and Adolescent Cancer, Vall d'Hebron Research Institute (VHIR)-UAB, Barcelona, Spain
| | - Soledad Gallego
- Laboratory of Translational Research in Child and Adolescent Cancer, Vall d'Hebron Research Institute (VHIR)-UAB, Barcelona, Spain
| | - Miguel F Segura
- Laboratory of Translational Research in Child and Adolescent Cancer, Vall d'Hebron Research Institute (VHIR)-UAB, Barcelona, Spain
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19
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Zhang D, Piao HL, Li YH, Qiu Q, Li DJ, Du MR, Tsang BK. Inhibition of AKT sensitizes chemoresistant ovarian cancer cells to cisplatin by abrogating S and G2/M arrest. Exp Mol Pathol 2016; 100:506-13. [PMID: 27163202 DOI: 10.1016/j.yexmp.2016.05.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 04/15/2016] [Accepted: 05/02/2016] [Indexed: 10/21/2022]
Abstract
The phosphatidylinositol 3-kinase (PI3K)/Akt pathway is frequently altered in human malignancies and Akt over-expression and/or activation induces malignant transformation and chemoresistance. However, the role of Akt in the mechanisms of chemoresistance remains elusive. Here we reported that cisplatin treatment of chemosensitive, but not resistant, ovarian cancer cells (OVCAs) markedly increased the cell proportion in sub-G1 phase. Cisplatin however caused a significant accumulation of the resistant cells in S and G2/M phases, which was associated with a rapid and sustained checkpoint kinase 1 (Chk1) activation. In contrast, while cisplatin also elicited a rapid activation of Chk1 in sensitive cells, it markedly decreased total ChK1 and phospho-Chk1 contents over 12 h. Over-expression of dominant negative (DN)-AKT alone increased phospho-Chk1 content, and induced G2/M arrest and apoptosis. However, it inhibited Chk1 activation and G2/M arrest with combination of cisplatin treatment, resulting in p53-independent apoptosis. Furthermore, the responses of the chemoresistant cells to cisplatin were attenuated with forced expression of constitutive active AKT2. Chk1 knock-down also facilitated cisplatin-induced apoptosis in chemoresistant cells. Our studies implicate that, in addition to its cell survival and anti-apoptotic actions, Akt might also play an important role in the regulation of G2-M transition, possibly via up-regulation of Chk1 activity and stability. These data provide strong support for the concept that Akt is important in cell cycle regulation in the control of chemosensitivity in OVCAs and offers an alternate regulatory pathway for the development of rationale therapy for cisplatin-resistant ovarian cancer.
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Affiliation(s)
- Di Zhang
- Laboratory for Reproductive Immunology, Hospital and Institute of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai, 200011, China; Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, 200011, China
| | - Hai-Lan Piao
- Laboratory for Reproductive Immunology, Hospital and Institute of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai, 200011, China; Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, 200011, China
| | - Yan-Hong Li
- Laboratory for Reproductive Immunology, Hospital and Institute of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai, 200011, China; Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, 200011, China
| | - Qing Qiu
- Department of Obstetrics and Gynecology, and Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Canada; Department of Cellular and Molecular Medicine, and Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Canada; Chronic Disease Program, Ottawa Hospital Research Institute, Ottawa, Canada
| | - Da-Jin Li
- Laboratory for Reproductive Immunology, Hospital and Institute of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai, 200011, China; Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, 200011, China
| | - Mei-Rong Du
- Laboratory for Reproductive Immunology, Hospital and Institute of Obstetrics and Gynecology, Fudan University Shanghai Medical College, Shanghai, 200011, China; Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, 200011, China; Department of Obstetrics and Gynecology, and Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Canada.
| | - Benjamin K Tsang
- State Key Laboratory of Quality Research in Chinese Medicine and the Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau; Department of Obstetrics and Gynecology, and Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Canada; Department of Cellular and Molecular Medicine, and Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Canada; Chronic Disease Program, Ottawa Hospital Research Institute, Ottawa, Canada.
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20
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Morgensztern D, Campo MJ, Dahlberg SE, Doebele RC, Garon E, Gerber DE, Goldberg SB, Hammerman PS, Heist R, Hensing T, Horn L, Ramalingam SS, Rudin CM, Salgia R, Sequist L, Shaw AT, Simon GR, Somaiah N, Spigel DR, Wrangle J, Johnson D, Herbst RS, Bunn P, Govindan R. Molecularly targeted therapies in non-small-cell lung cancer annual update 2014. J Thorac Oncol 2015; 10:S1-63. [PMID: 25535693 PMCID: PMC4346098 DOI: 10.1097/jto.0000000000000405] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
There have been significant advances in the understanding of the biology and treatment of non-small-cell lung cancer (NSCLC) during the past few years. A number of molecularly targeted agents are in the clinic or in development for patients with advanced NSCLC. We are beginning to understand the mechanisms of acquired resistance after exposure to tyrosine kinase inhibitors in patients with oncogene addicted NSCLC. The advent of next-generation sequencing has enabled to study comprehensively genomic alterations in lung cancer. Finally, early results from immune checkpoint inhibitors are very encouraging. This review summarizes recent advances in the area of cancer genomics, targeted therapies, and immunotherapy.
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Affiliation(s)
- Daniel Morgensztern
- Department of Medical Oncology, Washington University School of Medicine, Saint Louis, MO
| | - Meghan J. Campo
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston MA
| | - Suzanne E. Dahlberg
- Department of Biostatistics and Computational Biology, Dana-Farber Cancer Institute, Boston MA
| | - Robert C. Doebele
- Department of Medical Oncology, University of Colorado School of Medicine and University of Colorado Cancer Center, Aurora, CO
| | - Edward Garon
- UCLA Santa Monica Hematology Oncology, Santa Monica, CA
| | - David E. Gerber
- Division of Hematology-Oncology, Harold C. Simmons Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX
| | - Sarah B. Goldberg
- Department of Medical Oncology, Yale School of Medicine and Cancer Center, New Haven, CT
| | | | - Rebecca Heist
- Department of Oncology, Massachusetts General Hospital, Boston, MA
| | - Thomas Hensing
- Department of Oncology, The University of Chicago Medicine, Chicago, IL
| | - Leora Horn
- Division of Hematology-Oncology, Vanderbilt University Medical Center, Nashville, TN
| | - Suresh S. Ramalingam
- Department of Hematology and Medical Oncology, Emory University School of Medicine, Winship Cancer Institute, Atlanta, GA
| | | | - Ravi Salgia
- Department of Oncology, The University of Chicago Medicine, Chicago, IL
| | - Lecia Sequist
- Department of Oncology, Massachusetts General Hospital, Boston, MA
| | - Alice T. Shaw
- Department of Oncology, Massachusetts General Hospital, Boston, MA
| | - George R. Simon
- Division of Hematology-Oncology, Medical University of South Carolina, Charleston, SC
| | - Neeta Somaiah
- Division of Hematology-Oncology, Medical University of South Carolina, Charleston, SC
| | | | - John Wrangle
- The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, MD
| | - David Johnson
- Department of Internal Medicine, UT Southwestern Medical Center, Dallas, Texas
| | - Roy S. Herbst
- Department of Medical Oncology, Yale School of Medicine and Cancer Center, New Haven, CT
| | - Paul Bunn
- Division of Medical Oncology, University of Colorado Denver School of Medicine, Denver, CO
| | - Ramaswamy Govindan
- Department of Medical Oncology, Washington University School of Medicine, Saint Louis, MO
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21
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Wei W, Sun HH, Li N, Li HY, Li X, Li Q, Shen XH. WNT5A modulates cell cycle progression and contributes to the chemoresistance in pancreatic cancer cells. Hepatobiliary Pancreat Dis Int 2014; 13:529-38. [PMID: 25308364 DOI: 10.1016/s1499-3872(14)60277-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Although there are many studies on the mechanism of chemoresistance in cancers, studies on the relations between WNT5A and chemoresistance in pancreatic cancer are rare. The present study was to examine the role of WNT5A in the regulation of cell cycle progression and in chemo-resistance in pancreatic cancer tissues and cell lines. METHODS Fresh pancreatic cancer and paracarcinoma tissues were obtained from 32 patients. The expressions of WNT5A, AKT/p-AKT and Cyclin D1 were detected by immunohistochemistry, and the correlation between WNT5A expression and clinicopathological characteristics was analyzed. The relationship between WNT5A expression and gemcitabine resistance was studied in PANC-1 and MIAPaCa2 cell lines. The effect of WNT5A on the regulation of cell cycle and gemcitabine cytotoxicity were investigated. The associations among the expressions of p-AKT, Cyclin D1 and WNT5A were also analyzed in cell lines and the effect of WNT5A on restriction-point (R-point) progression was evaluated. RESULTS WNT5A, p-AKT and Cyclin D1 were highly expressed in pancreatic cancer tissues, and the WNT5A expression was correlated with the TNM stages. In vitro, WNT5A expression was associated with gemcitabine chemoresistance. The percentage of cells was increased in G0/G1 phase and decreased in S phase after knockdown of WNT5A in PANC-1. WNT5A promoted Cyclin D1 expression through phosphorylation of AKT which consequently enhanced G1-S transition and gemcitabine resistance. Furthermore, WNT5A enhanced the cell cycle progression toward R-point through regulation of retinoblastoma protein (pRb) and pRb-E2F complex formation. CONCLUSIONS WNT5A induced chemoresistance by regulation of G1-S transition in pancreatic cancer cells. WNT5A might serve as a predictor of gemcitabine response and as a potential target for tumor chemotherapy.
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Affiliation(s)
- Wei Wei
- Department of Pathophysiology, School of Medicine, Nankai University, Tianjin 300071, China; Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin 300060, China.
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22
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Albiges L, Goubar A, Scott V, Vicier C, Lefèbvre C, Alsafadi S, Commo F, Saghatchian M, Lazar V, Dessen P, Delaloge S, André F, Quidville V. Chk1 as a new therapeutic target in triple-negative breast cancer. Breast 2014; 23:250-8. [PMID: 24636978 DOI: 10.1016/j.breast.2014.02.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 01/30/2014] [Accepted: 02/14/2014] [Indexed: 12/25/2022] Open
Abstract
OBJECTIVES Bioinformatics analyses of pathways and genes differentially expressed between malignant and benign lesions could allow discovering new therapeutic targets. Here, we identified Checkpoint kinase 1 (Chk1) as a potent therapeutic target in triple-negative breast cancer (TNBC). MATERIALS AND METHODS Differential gene expression between TNBC, other malignant and benign lesions was performed on two breast cancer datasets. Chk1 was targeted using RNA interference or chemical inhibitor in several TNBC cell lines. RESULTS DNA repair pathway was identified as one mostly deregulated pathway in TNBC as compared to benign lesions. Chk1 was identified as candidate target among the 35 genes included in this pathway. Gene expression analysis revealed that Chk1 gene was significantly overexpressed in TNBC as compared to non-TNBC and benign lesions. Depletion of Chk1 protein expression induced a marked reduction of cell viability and led to mitotic catastrophe in TNBC cells. Chemical Chk1 inhibitor decreased survival in TNBC cells, and transcriptome analyze revealed a modulation of gene expression profile in response to Chk1 treatment. CONCLUSION These findings suggest that Chk1 may represent a therapeutic target in TNBC, and provide a rationale to evaluate Chk1 inhibitors in breast cancer patients.
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Affiliation(s)
| | - Aïcha Goubar
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR981, Villejuif F-94800, France
| | - Véronique Scott
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR981, Villejuif F-94800, France
| | - Cécile Vicier
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR981, Villejuif F-94800, France
| | - Céline Lefèbvre
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR981, Villejuif F-94800, France
| | - Samar Alsafadi
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR981, Villejuif F-94800, France
| | - Frédéric Commo
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR981, Villejuif F-94800, France
| | | | - Vladimir Lazar
- Plateforme de Biologie Intégrée, Institut de cancérologie Gustave Roussy, Villejuif F-94800, France
| | - Philippe Dessen
- Plateforme de Biologie Intégrée, Institut de cancérologie Gustave Roussy, Villejuif F-94800, France
| | - Suzette Delaloge
- Department of Medical Oncology, Villejuif F-94800, France; Institut National de la Santé et de la Recherche Médicale (INSERM) UMR981, Villejuif F-94800, France
| | - Fabrice André
- Department of Medical Oncology, Villejuif F-94800, France; Institut National de la Santé et de la Recherche Médicale (INSERM) UMR981, Villejuif F-94800, France.
| | - Virginie Quidville
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR981, Villejuif F-94800, France
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23
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Liu Z, Rader J, He S, Phung T, Thiele CJ. CASZ1 inhibits cell cycle progression in neuroblastoma by restoring pRb activity. Cell Cycle 2014; 12:2210-8. [PMID: 23892435 DOI: 10.4161/cc.25265] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Dysregulation of cell cycle genes such as Cyclin D1 and Chk1 contributes to the undifferentiated phenotype of neuroblastoma (NB). CASZ1 functions as a tumor suppressor in NB; here we sought to determine how loss of CASZ1 contributes to cell cycle dysregulation in NB. CASZ1 restoration in NB cells delays NB cell cycle progression. The earliest changes occur within 8 h of CASZ1 restoration in SY5Y cells with a 2.8-fold increase in the level of p21, an inhibitor of Cdk2/4. By 16 h, there is a 40% decrease in the steady-state levels of Cdk6. Restoration of CASZ1 decreases Cdk2-dependent cyclins A and E protein levels and Cdk4/6-dependent Cyclin D1 protein levels. The restoration of CASZ1 resulted in a decrease in pRb phosphorylation and a significant reduction of E2F transcriptional activity. Subsequent to the changes in the G 1/S transition, induction of CASZ1 results in a decrease in Cyclin B levels and Cdc25c phosphatase levels, an upstream activator of the G 2/M regulator CyclinB:Cdk1. In addition, induction of CASZ1 results in a decrease in the levels of phospho-Chk1, a key M-phase regulatory kinase. Similar results were found in a NB cell line with MYCN amplification. Taken together, this study indicates that restoration of CASZ1 activates pRb in G 1 and inhibits the G 2/M regulators Cyclin B1 and Chk1, leading to a lengthening of NB cell cycle progression and a subsequent decrease in cell proliferation.
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Affiliation(s)
- Zhihui Liu
- Pediatric Oncology Branch; National Cancer Institute; Bethesda, MD, USA
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24
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Brodeur GM, Iyer R, Croucher JL, Zhuang T, Higashi M, Kolla V. Therapeutic targets for neuroblastomas. Expert Opin Ther Targets 2014; 18:277-92. [PMID: 24387342 DOI: 10.1517/14728222.2014.867946] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Neuroblastoma (NB) is the most common and deadly solid tumor in children. Despite recent improvements, the long-term outlook for high-risk NB is still < 50%. Further, there is considerable short- and long-term toxicity. More effective, less toxic therapy is needed, and the development of targeted therapies offers great promise. AREAS COVERED Relevant literature was reviewed to identify current and future therapeutic targets that are critical to malignant transformation and progression of NB. The potential or actual NB therapeutic targets are classified into four categories: i) genes activated by amplification, mutation, translocation or autocrine overexpression; ii) genes inactivated by deletion, mutation or epigenetic silencing; iii) membrane-associated genes expressed on most NBs but few other tissues; or iv) common target genes relevant to NB as well as other tumors. EXPERT OPINION Therapeutic approaches have been developed to some of these targets, but many remain untargeted at the present time. It is unlikely that single targeted agents will be sufficient for long-term cure, at least for high-risk NBs. The challenge will be how to integrate targeted agents with each other and with conventional therapy to enhance their efficacy, while simultaneously reducing systemic toxicity.
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Affiliation(s)
- Garrett M Brodeur
- Children's Hospital of Philadelphia, Division of Oncology , CTRB Rm. 3018, 3501 Civic Center Blvd., Philadelphia, PA 19104-4302 , USA +1 215 590 2817 ; +1 215 590 3770 ;
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25
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Molecular oncology of neuroblastoma. Mol Oncol 2013. [DOI: 10.1017/cbo9781139046947.060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Pitts TM, Davis SL, Eckhardt SG, Bradshaw-Pierce EL. Targeting nuclear kinases in cancer: development of cell cycle kinase inhibitors. Pharmacol Ther 2013; 142:258-69. [PMID: 24362082 DOI: 10.1016/j.pharmthera.2013.12.010] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Accepted: 11/27/2013] [Indexed: 12/13/2022]
Abstract
Cellular proliferation is a tightly controlled set of events that is regulated by numerous nuclear protein kinases. The proteins involved include checkpoint kinases (CHK), cyclin-dependent kinases (CDK), which regulate the cell cycle and aurora kinases (AURK) and polo-like kinases (PLK), which regulate mitosis. In cancer, these nuclear kinases are often dysregulated and cause uncontrolled cell proliferation and growth. Much work has gone into developing novel therapeutics that target each of these protein kinases in cancer but none have been approved in patients. In this review we provide an overview of the current compounds being developed clinically to target these nuclear kinases involved in regulating the cell cycle and mitosis.
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Affiliation(s)
- Todd M Pitts
- Division of Medical Oncology, University of Colorado Denver, Anschutz Medical Campus, United States; University of Colorado Cancer Center, University of Colorado Denver, Anschutz Medical Campus, United States.
| | - S Lindsey Davis
- Division of Medical Oncology, University of Colorado Denver, Anschutz Medical Campus, United States
| | - S Gail Eckhardt
- Division of Medical Oncology, University of Colorado Denver, Anschutz Medical Campus, United States; University of Colorado Cancer Center, University of Colorado Denver, Anschutz Medical Campus, United States
| | - Erica L Bradshaw-Pierce
- Department of Pharmaceutical Sciences, University of Colorado Denver, Anschutz Medical Campus, United States; University of Colorado Cancer Center, University of Colorado Denver, Anschutz Medical Campus, United States
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Gadhikar MA, Sciuto MR, Alves MVO, Pickering CR, Osman AA, Neskey DM, Zhao M, Fitzgerald AL, Myers JN, Frederick MJ. Chk1/2 inhibition overcomes the cisplatin resistance of head and neck cancer cells secondary to the loss of functional p53. Mol Cancer Ther 2013; 12:1860-73. [PMID: 23839309 DOI: 10.1158/1535-7163.mct-13-0157] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Despite the use of multimodality therapy using cisplatin to treat patients with advanced stage squamous cell carcinoma of the head and neck (HNSCC), there is an unacceptably high rate of treatment failure. TP53 is the most commonly mutated gene in HNSCC, and the impact of p53 mutation on response to cisplatin treatment is poorly understood. Here, we show unambiguously that wild-type TP53 (wtp53) is associated with sensitivity of HNSCC cells to cisplatin treatment, whereas mutation or loss of TP53 is associated with cisplatin resistance. We also show that senescence is the major cellular response to cisplatin in wtp53 HNSCC cells and that cisplatin resistance in p53-null or -mutant TP53 cells is due to their lack of senescence. Given the dependence on checkpoint kinase (Chk)1/2 kinases to mediate the DNA damage response in p53-deficient cells, there is potential to exploit this to therapeutic advantage through targeted inhibition of the Chk1/2 kinases. Treatment of p53-deficient HNSCC cells with the Chk inhibitor AZD7762 sensitizes them to cisplatin through induction of mitotic cell death. This is the first report showing the ability of a Chk kinase inhibitor to sensitize TP53-deficient HNSCC to cisplatin in a synthetic lethal manner, which has significance given the frequency of TP53 mutations in this disease and because cisplatin has become part of standard therapy for aggressive HNSCC tumors. These preclinical data provide evidence that a personalized approach to the treatment of HNSCC based on Chk inhibition in p53-mutant tumors may be feasible.
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Affiliation(s)
- Mayur A Gadhikar
- Corresponding Authors: Mitchell J. Frederick, Department of Head & Neck Surgery, University of Texas, MD Anderson Cancer Center, 1515 Holcombe Blvd., Unit 1445, Houston, TX 77030.
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Hamed SS, Straubinger RM, Jusko WJ. Pharmacodynamic modeling of cell cycle and apoptotic effects of gemcitabine on pancreatic adenocarcinoma cells. Cancer Chemother Pharmacol 2013; 72:553-63. [PMID: 23835677 DOI: 10.1007/s00280-013-2226-6] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Accepted: 06/08/2013] [Indexed: 01/19/2023]
Abstract
PURPOSE The standard of care for treating patients with pancreatic adenocarcinomas includes gemcitabine (2',2'-difluorodeoxycytidine). Gemcitabine primarily elicits its response by stalling the DNA replication forks of cells in the S phase of the cell cycle. To provide a quantitative framework for characterizing the cell cycle and apoptotic effects of gemcitabine, we developed a pharmacodynamic model in which the activation of cell cycle checkpoints or cell death is dependent on gemcitabine exposure. METHODS Three pancreatic adenocarcinoma cell lines (AsPC-1, BxPC-3, and MiaPaca-2) were exposed to varying concentrations (0-100,000 ng/mL) of gemcitabine over a period of 96 h in order to quantify proliferation kinetics and cell distributions among the cell cycle phases. The model assumes that the drug can inhibit cycle-phase transitioning in each of the 3 phases (G1, S, and G2/M) and can cause apoptosis of cells in G1 and G2/M phases. Fitting was performed using the ADAPT5 program. RESULTS The time course of gemcitabine effects was well described by the model, and parameters were estimated with good precision. Model predictions and experimental data show that gemcitabine induces cell cycle arrest in the S phase at low concentrations, whereas higher concentrations induce arrest in all cell cycle phases. Furthermore, apoptotic effects of gemcitabine appear to be minimal and take place at later time points. CONCLUSION The pharmacodynamic model developed provides a quantitative, mechanistic interpretation of gemcitabine efficacy in 3 pancreatic cancer cell lines, and provides useful insights for rational selection of chemotherapeutic agents for combination therapy.
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Affiliation(s)
- Salaheldin S Hamed
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Buffalo, NY 14214, USA
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29
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Turner N, Moretti E, Siclari O, Migliaccio I, Santarpia L, D'Incalci M, Piccolo S, Veronesi A, Zambelli A, Del Sal G, Di Leo A. Targeting triple negative breast cancer: is p53 the answer? Cancer Treat Rev 2013; 39:541-50. [PMID: 23321033 DOI: 10.1016/j.ctrv.2012.12.001] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Accepted: 12/03/2012] [Indexed: 01/15/2023]
Abstract
Triple negative breast cancers, which are defined by lack of expression of estrogen, progesterone, or HER2 receptors, represent approximately 15% of all breast cancers, although they account for a much higher proportional of breast cancer mortality. This is due both to their innate aggressive biological characteristics, but also to lack of effective therapies. Conventional chemotherapy is currently the only treatment option, thus there is a critical need to find new and effective targeted therapies in this disease. While investigation of agents such as poly (ADP-ribose) polymerase (PARP) inhibitors and EGFR inhibitors continues, results from recent clinical trials indicate that these therapies are not as active in sporadic triple negative breast cancers as initially hoped. It is important therefore to consider other emerging therapeutic agents. Mutation in p53 is found in the vast majority of triple negative breast cancers, and as such is a target of particular interest. Within this review, several agents with potential activity against aberrant p53 signaling have been considered, as a novel approach to finding an effective targeted therapy for this aggressive breast cancer subtype.
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Affiliation(s)
- Natalie Turner
- Sandro Pitigliani Medical Oncology Unit, Department of Oncology, Hospital of Prato, Prato, Italy
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30
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Russell MR, Levin K, Rader J, Belcastro L, Li Y, Martinez D, Pawel B, Shumway SD, Maris JM, Cole KA. Combination therapy targeting the Chk1 and Wee1 kinases shows therapeutic efficacy in neuroblastoma. Cancer Res 2012; 73:776-84. [PMID: 23135916 DOI: 10.1158/0008-5472.can-12-2669] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Neuroblastoma is uniquely sensitive to single-agent inhibition of the DNA damage checkpoint kinase Chk1, leading us to examine downstream effectors of this pathway and identify mitotic regulator Wee1 as an additional therapeutic target in this disease. Wee1 was overexpressed in both neuroblastoma cell lines and high-risk patient tumors. Genetic or pharmacologic abrogation of Wee1 signaling results in marked cytotoxicity in 10 of 11 neuroblastoma cell lines with a median IC(50) of 300 nmol/L for the Wee1-selective small-molecule inhibitor MK-1775. Murine tumor lines derived from mice that were either heterozygous or homozygous for MycN were particularly sensitive to single-agent inhibition of Wee1 (IC(50)s of 160 and 62 nmol/L, respectively). Simultaneous pharmacologic inhibition of Chk1 and Wee1 acted in a synergistic fashion to further impede neuroblastoma cell growth in vitro, in a manner greater than the individual inhibitors either alone or combined with chemotherapy. Combination Chk1 and Wee1 inhibition also revealed in vivo efficacy in neuroblastoma xenografts. Taken together, our results show that neuroblastoma cells depend on Wee1 activity for growth and that inhibition of this kinase may serve as a therapeutic for patients with neuroblastoma.
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Affiliation(s)
- Mike R Russell
- Division of Oncology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
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31
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Aris SM, Pommier Y. Potentiation of the novel topoisomerase I inhibitor indenoisoquinoline LMP-400 by the cell checkpoint and Chk1-Chk2 inhibitor AZD7762. Cancer Res 2011; 72:979-89. [PMID: 22189968 DOI: 10.1158/0008-5472.can-11-2579] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Novel topoisomerase I (Top1) inhibitors are in clinical development to circumvent the drawbacks of camptothecins (CPT). Here, we report molecular investigations into LMP-400, an indenoisoquinoline Top1 inhibitor in phase 1 clinical trial, by itself and in combination with the cell-cycle checkpoint inhibitor AZD7762. We examined drug effects on DNA replication and killing of cancer cells and found that LMP-400 showed synergistic antiproliferative activity when combined with AZD7762 in human colon carcinoma cells. Inhibition of S-phase progression and bromodeoxyuridine incorporation were similarly induced by LMP-400 and CPT and were abrogated by AZD7762. Replication studied by single DNA molecule analyses and immunofluorescence microscopy (molecular combing) showed rapid inhibition of fork progression in response to LMP-400 treatment with subsequent recapitulation after AZD7762 addition. AZD7762 inhibited both the activation/autophosphosphorylation of Chk1 and Chk2 at nanomolar concentrations in LMP-400-treated cells. This potent dual inhibition of Chk1 and Chk2 by AZD7762 was below the drug concentrations required to abrogate cell-cycle inhibition and produce synergism with LMP-400. Also, the synergism was independent of Chk2 both in Chk2-complemented cells and Chk2 knockout cells, suggesting additional mechanisms for cell-cycle abrogation by AZD7762. Together, our findings show a rationale for combining cell-cycle checkpoint inhibitors with the novel non-CPT indenoisoquinoline Top1 inhibitors.
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Affiliation(s)
- Sheena M Aris
- Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland, USA
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32
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Role of checkpoint kinase 1 (Chk1) in the mechanisms of resistance to histone deacetylase inhibitors. Proc Natl Acad Sci U S A 2011; 108:19629-34. [PMID: 22106282 DOI: 10.1073/pnas.1117544108] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Histone deacetylase inhibitors (HDACi) are a new group of anticancer drugs with tumor selective toxicity. Normal cells are relatively resistant to HDACi-induced cell death compared with cancer cells. Previously, we found that vorinostat induces DNA breaks in normal and transformed cells, which normal but not cancer cells can repair. In this study, we found that checkpoint kinase 1 (Chk1), a component of the G2 DNA damage checkpoint, is important in the resistance of normal cells to HDACi in vitro and in vivo. Inhibition of Chk1 activity with Chk1 inhibitor (UCN-01, AZD7762, or CHIR-124) in normal cells increases their sensitivity to HDACi (vorinostat, romidepsin, or entinostat) induced cell death, associated with extensive mitotic disruption. Mitotic abnormalities included loss of sister chromatid cohesion and chromosomal disruption. Inhibition of Chk1 did increase HDACi-induced cell death of transformed cells. Thus, Chk1 is an important factor in the resistance of normal cells, and some transformed cells, to HDACi-induced cell death. Use of Chk1 inhibitors in combination with anticancer agents to treat cancers may be associated with substantial toxicity.
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