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Huang YH, Chiu LY, Tseng JS, Hsu KH, Chen CH, Sheu GT, Yang TY. Attenuation of PI3K-Akt-mTOR Pathway to Reduce Cancer Stemness on Chemoresistant Lung Cancer Cells by Shikonin and Synergy with BEZ235 Inhibitor. Int J Mol Sci 2024; 25:616. [PMID: 38203787 PMCID: PMC10779050 DOI: 10.3390/ijms25010616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 12/15/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024] Open
Abstract
Lung cancer is considered the number one cause of cancer-related deaths worldwide. Although current treatments initially reduce the lung cancer burden, relapse occurs in most cases; the major causes of mortality are drug resistance and cancer stemness. Recent investigations have provided evidence that shikonin generates various bioactivities related to the treatment of cancer. We used shikonin to treat multi-resistant non-small lung cancer cells (DOC-resistant A549/D16, VCR-resistant A549/V16 cells) and defined the anti-cancer efficacy of shikonin. Our results showed shikonin induces apoptosis in these ABCB1-dependent and independent chemoresistance cancer sublines. Furthermore, we found that low doses of shikonin inhibit the proliferation of lung cancer stem-like cells by inhibiting spheroid formation. Concomitantly, the mRNA level and protein of stemness genes (Nanog and Oct4) were repressed significantly on both sublines. Shikonin reduces the phosphorylated Akt and p70s6k levels, indicating that the PI3K/Akt/mTOR signaling pathway is downregulated by shikonin. We further applied several signaling pathway inhibitors that have been used in anti-cancer clinical trials to test whether shikonin is suitable as a sensitizer for various signaling pathway inhibitors. In these experiments, we found that low doses shikonin and dual PI3K-mTOR inhibitor (BEZ235) have a synergistic effect that inhibits the spheroid formation from chemoresistant lung cancer sublines. Inhibiting the proliferation of lung cancer stem cells is believed to reduce the recurrence of lung cancer; therefore, shikonin's anti-drug resistance and anti-cancer stem cell activities make it a highly interesting molecule for future combined lung cancer therapy.
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Affiliation(s)
- Yen-Hsiang Huang
- Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung 407, Taiwan; (Y.-H.H.); (L.-Y.C.); (J.-S.T.)
- Faculty of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
| | - Ling-Yen Chiu
- Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung 407, Taiwan; (Y.-H.H.); (L.-Y.C.); (J.-S.T.)
| | - Jeng-Sen Tseng
- Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung 407, Taiwan; (Y.-H.H.); (L.-Y.C.); (J.-S.T.)
- Faculty of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
- Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung 402, Taiwan
| | - Kuo-Hsuan Hsu
- Division of Critical Care and Respiratory Therapy, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung 407, Taiwan;
| | - Chang-Han Chen
- Department of Applied Chemistry, Graduate Institute of Biomedicine and Biomedical Technology, National Chi Nan University, Nantou 545, Taiwan;
- Department of Medical Research, Taichung Veterans General Hospital, Taichung 407, Taiwan
| | - Gwo-Tarng Sheu
- Institute of Medicine, Chung Shan Medical University, Taichung 402, Taiwan
- Department of Medical Oncology and Chest Medicine, Chung Shan Medical University Hospital, Taichung 402, Taiwan
| | - Tsung-Ying Yang
- Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung 407, Taiwan; (Y.-H.H.); (L.-Y.C.); (J.-S.T.)
- Department of Life Sciences, National Chung Hsing University, Taichung 402, Taiwan
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2
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Li HT, Zhu X. Quinoline-based Compounds with Potential Activity against Drugresistant Cancers. Curr Top Med Chem 2021; 21:426-437. [PMID: 32552650 DOI: 10.2174/1568026620666200618113957] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 05/06/2020] [Accepted: 05/12/2020] [Indexed: 11/22/2022]
Abstract
Drug resistance is the major cause of the failure of cancer chemotherapy, so one of the most important features in developing effective cancer therapeutic strategies is to overcome drug resistance. Quinoline moiety has become one of the most privileged structural motifs in anticancer agent discovery since its derivatives possess potent activity against various cancers including drug-resistant cancers. Several quinoline-based compounds which are represented by Anlotinib, Bosutinib, Lenvatinib, and Neratinib have already been applied in clinical practice to fight against cancers, so quinoline-based compounds are potential anticancer agents. The present short review article provides an overview of the recent advances of quinoline-based compounds with potential activity against drug-resistant cancers. The structure-activity relationship and mechanisms of action are also discussed.
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Affiliation(s)
- Huan-Ting Li
- Department of Pharmacy, Baotou Medical College, Baotou, Inner Mongolia, 014040, China
| | - Xiaoyong Zhu
- Department of Oncology, Zhuji Affiliated Hospital of Shaoxing University, Zhejiang Province 311800, China
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Wood S, Willbanks A, Cheng JX. The Role of RNA Modifications and RNA-modifying Proteins in Cancer Therapy and Drug Resistance. Curr Cancer Drug Targets 2021; 21:326-352. [PMID: 33504307 DOI: 10.2174/1568009621666210127092828] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 12/03/2020] [Accepted: 12/03/2020] [Indexed: 11/22/2022]
Abstract
The advent of new genome-wide sequencing technologies has uncovered abnormal RNA modifications and RNA editing in a variety of human cancers. The discovery of reversible RNA N6-methyladenosine (RNA: m6A) by fat mass and obesity-associated protein (FTO) demethylase has led to exponential publications on the pathophysiological functions of m6A and its corresponding RNA modifying proteins (RMPs) in the past decade. Some excellent reviews have summarized the recent progress in this field. Compared to the extent of research into RNA: m6A and DNA 5-methylcytosine (DNA: m5C), much less is known about other RNA modifications and their associated RMPs, such as the role of RNA: m5C and its RNA cytosine methyltransferases (RCMTs) in cancer therapy and drug resistance. In this review, we will summarize the recent progress surrounding the function, intramolecular distribution and subcellular localization of several major RNA modifications, including 5' cap N7-methylguanosine (m7G) and 2'-O-methylation (Nm), m6A, m5C, A-to-I editing, and the associated RMPs. We will then discuss dysregulation of those RNA modifications and RMPs in cancer and their role in cancer therapy and drug resistance.
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Affiliation(s)
- Shaun Wood
- Department of Pathology, Hematopathology Section, University of Chicago, Chicago, IL60637, United States
| | - Amber Willbanks
- Department of Pathology, Hematopathology Section, University of Chicago, Chicago, IL60637, United States
| | - Jason X Cheng
- Department of Pathology, Hematopathology Section, University of Chicago, Chicago, IL60637, United States
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4
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The c-Myc/AKT1/TBX3 Axis Is Important to Target in the Treatment of Embryonal Rhabdomyosarcoma. Cancers (Basel) 2020; 12:cancers12020501. [PMID: 32098189 PMCID: PMC7072582 DOI: 10.3390/cancers12020501] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/17/2020] [Accepted: 02/18/2020] [Indexed: 02/06/2023] Open
Abstract
Rhabdomyosarcoma is a highly aggressive malignant cancer that arises from skeletal muscle progenitor cells and is the third most common solid tumour in children. Despite significant advances, rhabdomyosarcoma still presents a therapeutic challenge, and while targeted therapy has shown promise, there are limited options because the molecular drivers of rhabdomyosarcoma are poorly understood. We previously reported that the T-box transcription factor 3 (TBX3), which has been identified as a druggable target in many cancers, is overexpressed in rhabdomyosarcoma patient samples and cell lines. To identify new molecular therapeutic targets to treat rhabdomyosarcoma, this study investigates the potential oncogenic role(s) for TBX3 and the factors responsible for upregulating it in this cancer. To this end, rhabdomyosarcoma cell culture models in which TBX3 was either stably knocked down or overexpressed were established and the impact on key hallmarks of cancer were examined using growth curves, soft agar and scratch motility assays, as well as tumour-forming ability in nude mice. Our data show that TBX3 promotes substrate-dependent and -independent proliferation, migration and tumour formation. We further reveal that TBX3 is upregulated by c-Myc transcriptionally and AKT1 post-translationally. This study identifies c-Myc/AKT1/TBX3 as an important axis that could be targeted for the treatment of rhabdomyosarcoma.
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Ruan B, Liu W, Chen P, Cui R, Li Y, Ji M, Hou P, Yang Q. NVP-BEZ235 inhibits thyroid cancer growth by p53- dependent/independent p21 upregulation. Int J Biol Sci 2020; 16:682-693. [PMID: 32025215 PMCID: PMC6990918 DOI: 10.7150/ijbs.37592] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 11/30/2019] [Indexed: 01/25/2023] Open
Abstract
NVP-BEZ235 is a novel dual PI3K/mTOR inhibitor, currently in phase 1/2 clinical trials, exhibiting clinical efficiency in treatment of numerous malignancies including thyroid cancer. Cancer cells harboring mutant p53 was widely reported to be blunt to pharmaceutical therapies. However, whether this genotype dependent effect also presents in thyroid cancer when treated with NVP-BEZ235 remains unknown. Therefore, in this study, the tumor suppressing effects of NVP-BEZ235 in thyroid cancer cell lines and in-vivo xenograft mouse model harboring different p53 status were examined. The antitumor effects were confirmed in p53 mutant thyroid cancer cells, though less prominent than p53 wild type cells. And for the p53 mutant cells, p53-independent upregulation of p21 plays a critical role in their response to NVP-BEZ235. Moreover, GSK3β/β-catenin signaling inhibition was implicated in the p21-mediated G0/G1 cell cycle arrest in both p53 wild type and mutant thyroid cancer cells treated with NVP-BEZ235.
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Affiliation(s)
- Banjun Ruan
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China
| | - Wei Liu
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China
| | - Pu Chen
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China
| | - Rongrong Cui
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China
| | - Yu Li
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China
| | - Meiju Ji
- Center for Translational Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China
| | - Peng Hou
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China.,Key Laboratory for Tumor Precision Medicine of Shaanxi Province, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China
| | - Qi Yang
- Department of Endocrinology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China.,Key Laboratory for Tumor Precision Medicine of Shaanxi Province, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, P.R. China
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6
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Owonikoko TK, Harvey RD, Carthon B, Chen Z, Lewis C, Collins H, Zhang C, Lawson DH, Alese OB, Bilen MA, Sica GL, Steuer CE, Shaib WL, Wu C, Harris WB, Akce M, Kudchagkar RR, El-Rayes BF, Lonial S, Ramalingam SS, Khuri FR. A Phase I Study of Safety, Pharmacokinetics, and Pharmacodynamics of Concurrent Everolimus and Buparlisib Treatment in Advanced Solid Tumors. Clin Cancer Res 2020; 26:2497-2505. [PMID: 32005746 DOI: 10.1158/1078-0432.ccr-19-2697] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 11/19/2019] [Accepted: 01/27/2020] [Indexed: 11/16/2022]
Abstract
PURPOSE Concurrent inhibition of mTOR and PI3K led to improved efficacy in preclinical models and provided the rationale for this phase I study of everolimus and buparlisib (BKM120) in patients with advanced solid tumor. PATIENTS AND METHODS We used the Bayesian Escalation with Overdose Control design to test escalating doses of everolimus (5 or 10 mg) and buparlisib (20, 40, 60, 80, and 100 mg) in eligible patients. Pharmacokinetic assessment was conducted using blood samples collected on cycle 1, days 8 and 15. Pharmacodynamic impact on mTOR/PI3K pathway modulation evaluated in paired skin biopsies collected at baseline and end of cycle 1. RESULTS We enrolled 43 patients, median age of 63 (range, 39-78) years; 25 (58.1%) females, 35 (81.4%) Caucasians, and 8 (18.6%) Blacks. The most frequent toxicities were hyperglycemia, diarrhea, nausea, fatigue, and aspartate aminotransferase elevation. Dose-limiting toxicities observed in 7 patients were fatigue (3), hyperglycemia (2), mucositis (1), acute kidney injury (1), and urinary tract infection (1). The recommended phase II dose (RP2D) for the combination was established as everolimus (5 mg) and buparlisib (60 mg). The best response in 27 evaluable patients was progressive disease and stable disease in 3 (11%) and 24 (89%), respectively. The median progression-free survival and overall survival were 2.7 (1.8-4.2) and 9 (6.4-13.2) months. Steady-state pharmacokinetic analysis showed dose-normalized maximum concentrations and AUC values for everolimus and buparlisib in combination to be comparable with single-agent pharmacokinetic. CONCLUSIONS The combination of everolimus and buparlisib is safe and well-tolerated at the RP2D of 5 and 60 mg on a continuous daily schedule.
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Affiliation(s)
- Taofeek K Owonikoko
- Department of Hematology & Medical Oncology, Emory University, Atlanta, Georgia. .,Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - R Donald Harvey
- Department of Hematology & Medical Oncology, Emory University, Atlanta, Georgia.,Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Bradley Carthon
- Department of Hematology & Medical Oncology, Emory University, Atlanta, Georgia
| | - Zhengjia Chen
- Winship Cancer Institute of Emory University, Atlanta, Georgia.,Department of Statistics, Rollins School of Public Health, Emory University, Atlanta, Georgia
| | - Colleen Lewis
- Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Hanna Collins
- Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Chao Zhang
- Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - David H Lawson
- Department of Hematology & Medical Oncology, Emory University, Atlanta, Georgia
| | - Olatunji B Alese
- Department of Hematology & Medical Oncology, Emory University, Atlanta, Georgia
| | - Mehmet Asim Bilen
- Department of Hematology & Medical Oncology, Emory University, Atlanta, Georgia
| | - Gabriel L Sica
- Department of Statistics, Rollins School of Public Health, Emory University, Atlanta, Georgia.,Department of Pathology, Emory University, Atlanta, Georgia
| | - Conor E Steuer
- Department of Hematology & Medical Oncology, Emory University, Atlanta, Georgia
| | - Walid L Shaib
- Department of Hematology & Medical Oncology, Emory University, Atlanta, Georgia
| | - Christina Wu
- Department of Hematology & Medical Oncology, Emory University, Atlanta, Georgia
| | - Wayne B Harris
- Department of Hematology & Medical Oncology, Emory University, Atlanta, Georgia
| | - Mehmet Akce
- Department of Hematology & Medical Oncology, Emory University, Atlanta, Georgia
| | - Ragini R Kudchagkar
- Department of Hematology & Medical Oncology, Emory University, Atlanta, Georgia
| | - Bassel F El-Rayes
- Department of Hematology & Medical Oncology, Emory University, Atlanta, Georgia.,Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Sagar Lonial
- Department of Hematology & Medical Oncology, Emory University, Atlanta, Georgia.,Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Suresh S Ramalingam
- Department of Hematology & Medical Oncology, Emory University, Atlanta, Georgia.,Winship Cancer Institute of Emory University, Atlanta, Georgia
| | - Fadlo Raja Khuri
- Department of Hematology & Medical Oncology, Emory University, Atlanta, Georgia.,American University of Beirut, Beirut, Lebanon
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7
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Shi N, Yu H, Chen T. Inhibition of esophageal cancer growth through the suppression of PI3K/AKT/mTOR signaling pathway. Onco Targets Ther 2019; 12:7637-7647. [PMID: 31571914 PMCID: PMC6756275 DOI: 10.2147/ott.s205457] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 06/20/2019] [Indexed: 12/11/2022] Open
Abstract
Background The phosphatidylinositol-3-kinase (PI3K)/protein kinase B (AKT)/mammalian target of rapamycin (mTOR) pathway is implicated in several cancers. AKT allosteric inhibitor MK2206 and dual PI3K and mTOR inhibitor BEZ235 are promising drug candidates with potential anti-tumor effects. Purpose In this study, we aimed to detect the activation of PI3K/AKT/mTOR pathway and assess the efficacy of MK2206 and BEZ235 in inhibiting esophageal cancer growth. Materials and methods We used three different systems including carcinogen-induced animal model, human esophageal squamous cell carcinoma (SCC) cell lines, and xenograft mouse model. Results Our data indicated that components of the PI3K/AKT/mTOR pathway were overexpressed and activated in esophageal SCC. MK2206 and BEZ235 inhibited cell proliferation, enhanced apoptosis, and induced cell-cycle arrest through downstream effectors SKP2, MCL-1, and cyclin D1 in esophageal SCC cells. MK2206 and BEZ235 also inhibited tumor growth in xenograft mice through the inhibition of AKT phosphorylation. MK2206/BEZ235 combination showed greater anti-tumor effect than MK2206 or BEZ235 alone. The enhanced efficacy of the combination was associated with the inhibition of phosphorylation ATK on both Thr308 and Ser473. Conclusion The combination of MK2206 and BEZ235 exhibits potent antitumor effects and may have important clinical applications for esophageal SCC treatment.
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Affiliation(s)
- Ni Shi
- Division of Medical Oncology, Department of Internal Medicine, The Ohio State University, Columbus, OH, USA
| | - Hao Yu
- Division of Medical Oncology, Department of Internal Medicine, The Ohio State University, Columbus, OH, USA
| | - Tong Chen
- Division of Medical Oncology, Department of Internal Medicine, The Ohio State University, Columbus, OH, USA
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Beyens M, Vandamme T, Peeters M, Van Camp G, Op de Beeck K. Resistance to targeted treatment of gastroenteropancreatic neuroendocrine tumors. Endocr Relat Cancer 2019; 26:R109-R130. [PMID: 32022503 DOI: 10.1530/erc-18-0420] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The mammalian target of rapamycin (mTOR) is part of the phosphoinositide-3-kinase (PI3K)/protein kinase B (Akt)/mTOR signaling. The PI3K/Akt/mTOR pathway has a pivotal role in the oncogenesis of neuroendocrine tumors (NETs). In addition, vascular endothelial growth factor (VEGF) and platelet-derived growth factor (PDGF) drive angiogenesis in NETs and therefore contributes to neuroendocrine tumor development. Hence, mTOR and angiogenesis inhibitors have been developed. Everolimus, a first-generation mTOR inhibitor, has shown significant survival benefit in advanced gastroenteropancreatic NETs. Sunitinib, a pan-tyrosine kinase inhibitor that targets the VEGF receptor, has proven to increase progression-free survival in advanced pancreatic NETs. Nevertheless, primary and acquired resistance to rapalogs and sunitinib has limited the clinical benefit for NET patients. Despite the identification of multiple molecular mechanisms of resistance, no predictive biomarker has made it to the clinic. This review is focused on the mTOR signaling and angiogenesis in NET, the molecular mechanisms of primary and acquired resistance to everolimus and sunitinib and how to overcome this resistance by alternative drug compounds.
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Affiliation(s)
- Matthias Beyens
- Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
- Center for Oncological Research, University of Antwerp, Antwerp, Belgium
| | - Timon Vandamme
- Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
- Center for Oncological Research, University of Antwerp, Antwerp, Belgium
- Section of Endocrinology, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, the Netherlands
| | - Marc Peeters
- Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
| | - Guy Van Camp
- Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
- Center for Oncological Research, University of Antwerp, Antwerp, Belgium
| | - Ken Op de Beeck
- Center of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
- Center for Oncological Research, University of Antwerp, Antwerp, Belgium
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The novel PI3K inhibitor S1 synergizes with sorafenib in non-small cell lung cancer cells involving the Akt-S6 signaling. Invest New Drugs 2018; 37:828-836. [PMID: 30456603 DOI: 10.1007/s10637-018-0698-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 11/12/2018] [Indexed: 12/19/2022]
Abstract
Non-small cell lung cancer (NSCLC) has been the major cause of cancer-related deaths worldwide. Targeted therapy has been available as an additive strategy for NSCLC patients, but the inevitable resistance to mono-targeted agents has largely hampered its usage in the clinic. We have previously designed and synthesized a novel small molecule compound S1, 2-methoxy-3-phenylsulfonamino-5-(quinazolin-6-yl) benzamides and demonstrated its inhibition of PI3K and mTOR as well as the anti-tumor potential. In the present study, we have identified that S1 alone or combined with the multi-kinase inhibitor sorafenib can inhibit the in vitro cell proliferation of NSCLC cells (A549, NCI-H157 and 95D cells) and tumor growth in the A549 xenograft model. S1 alone produced inhibitory effects on the colony formation, cell migration and invasion and angiogenesis, with more pronounced inhibition when used with sorafenib. We further revealed that S1 mainly inhibited the Akt/S6 phosphorylation while sorafenib mostly decreased the phosphorylation of ERK. Together, the novel PI3K/mTOR inhibitor S1 per se exhibits strong anti-tumor effects in NSCLC cells and A549 xenograft, effects possibly via its inhibition of cell proliferation, invasion and migration and angiogenesis. The combination of S1 and sorafenib exerts potentiated anti-tumor effects, in which the underlying mechanisms may involve their differential modulation of the phosphorylation of Akt and S6 in the PI3K/Akt/mTOR cascades and ERK phosphorylation in the Raf/MEK/ERK pathways. The combination of S1 and sorafenib could be used as an additive approach in treating NSCLC in the clinic.
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NVP-BEZ235 Attenuated Cell Proliferation and Migration in the Squamous Cell Carcinoma of Oral Cavities and p70S6K Inhibition Mimics its Effect. Int J Mol Sci 2018; 19:ijms19113546. [PMID: 30423811 PMCID: PMC6274880 DOI: 10.3390/ijms19113546] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 11/08/2018] [Accepted: 11/08/2018] [Indexed: 11/19/2022] Open
Abstract
NVP-BEZ235 or BEZ235 is a dual inhibitor of adenosine triphosphate (ATP)-competitive phosphoinositide 3-kinase (PI3K)/mammalian-target-of-rapamycin (mTOR) and is promising for cancer treatment. Because it targets more than one downstream effector, a dual approach is promising for cancer treatment. The aim of this study was to evaluate the efficacy of NVP-BEZ235 in treating oral cavity squamous cell carcinoma (OSCC). Two human OSCC cell lines, SCC-4 and SCC-25, were used in this study. PI3K-AKT signaling, proliferation, and cell migratory and invasion capabilities of OSCC cells were examined. In NVP-BEZ235-treated SCC-4 and SCC-25 cells, the phosphorylation of 70-kDa ribosomal S6 kinase (p70S6K), but not mTOR, decreased within 24 h. NVP-BEZ235 inhibited OSCC-cell proliferation, migration, and invasion possibly by directly deregulating the phosphorylation of p70S6K. The phospho-p70S6K inhibitor mimicked the effects of NVP-BEZ235 for preventing proliferation and weakening the migratory and invasion abilities of SCC-4 and SCC-25 cells. This study further confirmed the effect of NVP-BEZ235 on OSCC cells and provided a new strategy for controlling the proliferation, migration, and invasion of OSCC cells using the phopho-p70S6K inhibitor.
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11
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Tian L, Qiao Y, Lee P, Wang L, Chang A, Ravi S, Rogers TA, Lu L, Singhana B, Zhao J, Melancon MP. Antitumor efficacy of liposome-encapsulated NVP-BEZ 235 in combination with irreversible electroporation. Drug Deliv 2018; 25:668-678. [PMID: 29482386 PMCID: PMC6058606 DOI: 10.1080/10717544.2018.1444683] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Irreversible electroporation (IRE) is an emerging minimally invasive tumor ablation technique that delivers short pulses of strong electric fields and kills cancer cells by disrupting their cell membranes with the electric pulses. However, clinical studies report that more than 10% of local tumor recurrences occur at the original ablated site. NVP BEZ-235 (BEZ) is a dual PI3K/mTOR inhibitor that has substantial anticancer effects. However, the clinical trials of BEZ was not satisfactory because of its low bioavailability and high toxicity, which stemmed from the use of oral administration of high doses over a long period of time. In this research, we prepared a liposomal formulation of BEZ (L-BEZ) for intratumoral injection and studied its antitumor efficacy alone and in combination with IRE. We hypothesized that IRE could release BEZ from the liposomes and that the combination could decrease tumor viability. Our results show that IRE released BEZ from its liposomal encapsulation. The combination of L-BEZ and IRE killed more Hep3B tumor cells in vitro than did L-BEZ or IRE alone and also inhibited cancer cell proliferation in nude mice bearing Hep3B xenografts. Combination of chemotherapeutic agent loaded nanoparticles could enhance the antitumor efficacy of IRE.
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Affiliation(s)
- Li Tian
- a Department of Interventional Radiology, Division of Diagnostic Imaging , The University of Texas MD Anderson Cancer Center , Houston , TX , USA
| | - Yang Qiao
- a Department of Interventional Radiology, Division of Diagnostic Imaging , The University of Texas MD Anderson Cancer Center , Houston , TX , USA
| | - Patrick Lee
- b College of Medicine , State University of New York Upstate Medical University , Syracuse , NY , USA
| | - Lucas Wang
- c The University of Texas at Austin Dell Medical School , Austin , TX , USA
| | | | - Saisree Ravi
- e Department of BioSciences , Rice University , Houston , TX , USA
| | - Thomas A Rogers
- f Department of Chemistry , Mississippi State University , Starkville , MS , USA
| | - Linfeng Lu
- g Department of Chemical and Biomolecular Engineering , Rice University , Houston , TX , USA
| | - Burapol Singhana
- a Department of Interventional Radiology, Division of Diagnostic Imaging , The University of Texas MD Anderson Cancer Center , Houston , TX , USA.,h Innovative Nanomedicine Research Unit , Chulabhorn International College of Medicine, Thammasat University, Rangsit Campus , Pathum Thani , Thailand
| | - Jun Zhao
- i Department of Cancer Systems Imaging , The University of Texas MD Anderson Cancer Center , Houston , TX , USA
| | - Marites P Melancon
- a Department of Interventional Radiology, Division of Diagnostic Imaging , The University of Texas MD Anderson Cancer Center , Houston , TX , USA.,j UT Health Graduate School of Biomedical Sciences , The University of Texas MD Anderson Cancer Center , Houston , TX , USA
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12
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NVP-BEZ235, a dual PI3K-mTOR inhibitor, suppresses the growth of FaDu hypopharyngeal squamous cell carcinoma and has a synergistic effect with Cisplatin. Cell Death Discov 2018; 4:57. [PMID: 29760955 PMCID: PMC5945618 DOI: 10.1038/s41420-018-0060-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 04/02/2018] [Accepted: 04/09/2018] [Indexed: 01/04/2023] Open
Abstract
NVP-BEZ235 is a dual phosphoinositide 3-kinase (PI3K)-mammalian target of rapamycin (mTOR) inhibitor. A dual approach targeting more than one downstream effector is a promising strategy for treating cancers. The aim of this study was to evaluate the effect of NVP-BEZ235 in treating FaDu hypopharyngeal squamous cell carcinoma (HSCC), either alone or in combination with cisplatin. We found mTOR expression was higher in patients with HSCC. In the in vitro study, treatment with NVP-BEZ235 alone attenuated cell proliferation and suppressed p-p70S6K and p-4E-BP1 expression in FaDu cells. When NVP-BEZ235 was combined with Cisplatin, apoptosis was induced more effectively than with either drug alone. In mice with a FaDu xenograft, cotreatment with NVP-BEZ235 and Cisplatin engendered synergistic effects and produced a greater antitumor response than did treatment with either drug alone. Resected tumor samples also showed decreased p-p70S6K expression. Collectively, these data demonstrate that NVP-BEZ235 inhibits HSCC growth through phospho-p70S6K suppression and has a synergistic effect with Cisplatin in treating HSCC. The data also provide a strategy for more effective HSCC treatment.
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13
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Xu W, Kim JW, Jung WJ, Koh Y, Yoon SS. Crizotinib in Combination with Everolimus Synergistically Inhibits Proliferation of Anaplastic Lymphoma Kinase‒Positive Anaplastic Large Cell Lymphoma. Cancer Res Treat 2018; 50:599-613. [PMID: 28675026 PMCID: PMC5912135 DOI: 10.4143/crt.2016.357] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 06/10/2017] [Indexed: 12/13/2022] Open
Abstract
PURPOSE Anaplastic large cell lymphoma (ALCL) is a rare aggresive non-Hodgkin lymphoma, of which over 50% of cases have an aberrant nucleophosmin (NPM)‒anaplastic lymphoma kinase (ALK) fusion protein. Both mechanistic target of rapamycin (mTOR) inhibitor everolimus and ALK inhibitor crizotinib have shown promising antitumor activity in ALK-positive cancer cell lines. However, their combined effect has not yet been investigated. MATERIALS AND METHODS We evaluated the anti-proliferative effects of everolimus and/or crizotinib in ALK-positive ALCL cell lines, Karpas 299 and SU-DHL-1, and lung adenocarcinoma cell line, NCI-H2228. RESULTS We found that individually, both everolimus and crizotinib potently inhibited cell growth in a dose-dependent manner in both Karpas 299 and SU-DHL-1 cells. A combination of these agents synergistically inhibited proliferation in the two cell lines. Crizotinib down-regulated aberrant AKT and ERK phosphorylation induced by everolimus. Combination treatment also significantly increased G0/G1 cell-cycle arrest, DNA damage, and apoptosis compared with everolimus or crizotinib alone in ALK-positive ALCL cells. In the Karpas 299 xenograft model, the combination treatment exerted a stronger antitumor effect than monotherapies, without significant change in body weight. The synergistic effect of everolimus and crizotinib was also reproduced in the ALK-positive lung adenocarcinoma cell line NCI-H2228. The combination treatment abrogated phosphoinositide 3-kinase/AKT and mTOR signaling pathways with little effect on the Ras/ERK pathway in NCI-H2228 cells. CONCLUSION Crizotinib combinedwith everolimus synergistically inhibits proliferation of ALK-positive ALCL cells. Our results suggest that this novel combination is worthy of further clinical development in patients with ALK-positive ALCL.
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Affiliation(s)
- Wendan Xu
- Cancer Research Institute, Seoul National University, Seoul, Korea
| | - Ji-Won Kim
- Cancer Research Institute, Seoul National University, Seoul, Korea
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Woo June Jung
- Cancer Research Institute, Seoul National University, Seoul, Korea
| | - Youngil Koh
- Cancer Research Institute, Seoul National University, Seoul, Korea
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
- Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea
| | - Sung-Soo Yoon
- Cancer Research Institute, Seoul National University, Seoul, Korea
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
- Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea
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14
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Raja R, Sahasrabuddhe NA, Radhakrishnan A, Syed N, Solanki HS, Puttamallesh VN, Balaji SA, Nanjappa V, Datta KK, Babu N, Renuse S, Patil AH, Izumchenko E, Prasad TSK, Chang X, Rangarajan A, Sidransky D, Pandey A, Gowda H, Chatterjee A. Chronic exposure to cigarette smoke leads to activation of p21 (RAC1)-activated kinase 6 (PAK6) in non-small cell lung cancer cells. Oncotarget 2018; 7:61229-61245. [PMID: 27542207 PMCID: PMC5308647 DOI: 10.18632/oncotarget.11310] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 08/08/2016] [Indexed: 12/21/2022] Open
Abstract
Epidemiological data clearly establishes cigarette smoking as one of the major cause for lung cancer worldwide. Recently, targeted therapy has become one of the most preferred modes of treatment for cancer. Though certain targeted therapies such as anti-EGFR are in clinical practice, they have shown limited success in lung cancer patients who are smokers. This demands discovery of alternative drug targets through systematic investigation of cigarette smoke-induced signaling mechanisms. To study the signaling events activated in response to cigarette smoke, we carried out SILAC-based phosphoproteomic analysis of H358 lung cancer cells chronically exposed to cigarette smoke. We identified 1,812 phosphosites, of which 278 phosphosites were hyperphosphorylated (≥ 3-fold) in H358 cells chronically exposed to cigarette smoke. Our data revealed hyperphosphorylation of S560 within the conserved kinase domain of PAK6. Activation of PAK6 is associated with various processes in cancer including metastasis. Mechanistic studies revealed that inhibition of PAK6 led to reduction in cell proliferation, migration and invasion of the cigarette smoke treated cells. Further, siRNA mediated silencing of PAK6 resulted in decreased invasive abilities in a panel of non-small cell lung cancer (NSCLC) cells. Consistently, mice bearing tumor xenograft showed reduced tumor growth upon treatment with PF-3758309 (group II PAK inhibitor). Immunohistochemical analysis revealed overexpression of PAK6 in 66.6% (52/78) of NSCLC cases in tissue microarrays. Taken together, our study indicates that PAK6 is a promising novel therapeutic target for NSCLC, especially in smokers.
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Affiliation(s)
- Remya Raja
- Institute of Bioinformatics, International Tech Park, Bangalore, 560 066, India
| | | | - Aneesha Radhakrishnan
- Institute of Bioinformatics, International Tech Park, Bangalore, 560 066, India.,Department of Biochemistry and Molecular Biology, Pondicherry University, Puducherry, 605014, India
| | - Nazia Syed
- Institute of Bioinformatics, International Tech Park, Bangalore, 560 066, India.,Department of Biochemistry and Molecular Biology, Pondicherry University, Puducherry, 605014, India
| | - Hitendra S Solanki
- Institute of Bioinformatics, International Tech Park, Bangalore, 560 066, India.,School of Biotechnology, KIIT University, Bhubaneswar, Odisha, 751024, India
| | - Vinuth N Puttamallesh
- Institute of Bioinformatics, International Tech Park, Bangalore, 560 066, India.,Amrita School of Biotechnology, Amrita University, Kollam, 690 525, India
| | - Sai A Balaji
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore, 560012, India
| | - Vishalakshi Nanjappa
- Institute of Bioinformatics, International Tech Park, Bangalore, 560 066, India.,Amrita School of Biotechnology, Amrita University, Kollam, 690 525, India
| | - Keshava K Datta
- Institute of Bioinformatics, International Tech Park, Bangalore, 560 066, India.,School of Biotechnology, KIIT University, Bhubaneswar, Odisha, 751024, India
| | - Niraj Babu
- Institute of Bioinformatics, International Tech Park, Bangalore, 560 066, India
| | - Santosh Renuse
- Institute of Bioinformatics, International Tech Park, Bangalore, 560 066, India.,Amrita School of Biotechnology, Amrita University, Kollam, 690 525, India
| | - Arun H Patil
- Institute of Bioinformatics, International Tech Park, Bangalore, 560 066, India.,School of Biotechnology, KIIT University, Bhubaneswar, Odisha, 751024, India
| | - Evgeny Izumchenko
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, 21231, USA
| | - T S Keshava Prasad
- Institute of Bioinformatics, International Tech Park, Bangalore, 560 066, India.,Amrita School of Biotechnology, Amrita University, Kollam, 690 525, India.,YU-IOB Center for Systems Biology and Molecular Medicine, Yenepoya University, Mangalore, 575018, India.,NIMHANS-IOB Proteomics and Bioinformatics Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neurosciences, Bangalore, 560029, India
| | - Xiaofei Chang
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, 21231, USA
| | - Annapoorni Rangarajan
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore, 560012, India
| | - David Sidransky
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, 21231, USA
| | - Akhilesh Pandey
- McKusick-Nathans Institute of Genetic Medicine, Baltimore, Maryland, 21205, USA.,Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, Maryland, 21205, USA.,Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, Maryland, 21205, USA.,Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, 21205, USA
| | - Harsha Gowda
- Institute of Bioinformatics, International Tech Park, Bangalore, 560 066, India.,YU-IOB Center for Systems Biology and Molecular Medicine, Yenepoya University, Mangalore, 575018, India
| | - Aditi Chatterjee
- Institute of Bioinformatics, International Tech Park, Bangalore, 560 066, India.,YU-IOB Center for Systems Biology and Molecular Medicine, Yenepoya University, Mangalore, 575018, India
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15
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Abstract
The MYC family oncogene is deregulated in >50% of human cancers, and this deregulation is frequently associated with poor prognosis and unfavorable patient survival. Myc has a central role in almost every aspect of the oncogenic process, orchestrating proliferation, apoptosis, differentiation, and metabolism. Although Myc inhibition would be a powerful approach for the treatment of many types of cancers, direct targeting of Myc has been a challenge for decades owing to its "undruggable" protein structure. Hence, alternatives to Myc blockade have been widely explored to achieve desirable anti-tumor effects, including Myc/Max complex disruption, MYC transcription and/or translation inhibition, and Myc destabilization as well as the synthetic lethality associated with Myc overexpression. In this review, we summarize the latest advances in targeting oncogenic Myc, particularly for cancer therapeutic purposes.
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Affiliation(s)
- Hui Chen
- 1Zhongnan Hospital of Wuhan University, Wuhan, People's Republic of China.,2Medical Research Institute, Wuhan University, Wuhan, People's Republic of China
| | - Hudan Liu
- 1Zhongnan Hospital of Wuhan University, Wuhan, People's Republic of China.,2Medical Research Institute, Wuhan University, Wuhan, People's Republic of China
| | - Guoliang Qing
- 1Zhongnan Hospital of Wuhan University, Wuhan, People's Republic of China.,2Medical Research Institute, Wuhan University, Wuhan, People's Republic of China
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16
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Piao J, Chen L, Quan T, Li L, Quan C, Piao Y, Jin T, Lin Z. Superior efficacy of co-treatment with the dual PI3K/mTOR inhibitor BEZ235 and histone deacetylase inhibitor Trichostatin A against NSCLC. Oncotarget 2018; 7:60169-60180. [PMID: 27507059 PMCID: PMC5312376 DOI: 10.18632/oncotarget.11109] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 07/19/2016] [Indexed: 12/12/2022] Open
Abstract
Non-small-cell lung cancer (NSCLC) is the leading cause of cancer-related death worldwide. NSCLC development and progression have recently been correlated with the heightened activation of histone deacetylases (HDACs) and PI3K/Akt signaling pathways. Targeted inhibition of these proteins is promising approach for the development of novel therapeutic strategies to treat patients with advanced NSCLC. For this reason, we combined a dual PI3K and mTOR inhibitor, BEZ235 with the HDAC inhibitor Trichostatin A (TSA), to determine their combined effects on human NSCLC. In this study, we initially discovered that co-treatment with BEZ235 and TSA showed a synergistic effect on inhibition of NSCLC cell proliferation and induction of apoptosis. The combination treatment also synergistically suppressed NSCLC migration, invasion and the NSCLC epithelial-mesenchymal transition (EMT) in vitro. The synergistic effect was also evidenced by declines in xenograft growth and metastasis rates and in ki-67 protein expression in vivo. Together, these results indicated that BEZ235 and TSA combination treatment significantly increased anti-tumor activities compared with BEZ235 and TSA alone, supporting a further evaluation of combination treatment for NSCLC.
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Affiliation(s)
- Junjie Piao
- Department of Pathology & Cancer Research Center, Yanbian University Medical College, Yanji 133002, China.,Key Laboratory of Natural Resources of Changbai Mountain & Functional Molecules (Yanbian University), Ministry of Education, Yanji 133002, China
| | - Liyan Chen
- Key Laboratory of Natural Resources of Changbai Mountain & Functional Molecules (Yanbian University), Ministry of Education, Yanji 133002, China
| | - Taihao Quan
- Department of Dermatology, University of Michigan Medical School, Michigan 48109-5609, USA
| | - Longshan Li
- Department of Radiation Oncology, Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, Texas 75390-8807, USA
| | - Chunji Quan
- Department of Pathology & Cancer Research Center, Yanbian University Medical College, Yanji 133002, China
| | - Yingshi Piao
- Department of Pathology & Cancer Research Center, Yanbian University Medical College, Yanji 133002, China
| | - Tiefeng Jin
- Department of Pathology & Cancer Research Center, Yanbian University Medical College, Yanji 133002, China.,Key Laboratory of Natural Resources of Changbai Mountain & Functional Molecules (Yanbian University), Ministry of Education, Yanji 133002, China
| | - Zhenhua Lin
- Department of Pathology & Cancer Research Center, Yanbian University Medical College, Yanji 133002, China
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17
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Salazar R, Garcia-Carbonero R, Libutti SK, Hendifar AE, Custodio A, Guimbaud R, Lombard-Bohas C, Ricci S, Klümpen HJ, Capdevila J, Reed N, Walenkamp A, Grande E, Safina S, Meyer T, Kong O, Salomon H, Tavorath R, Yao JC. Phase II Study of BEZ235 versus Everolimus in Patients with Mammalian Target of Rapamycin Inhibitor-Naïve Advanced Pancreatic Neuroendocrine Tumors. Oncologist 2017; 23:766-e90. [PMID: 29242283 PMCID: PMC6058330 DOI: 10.1634/theoncologist.2017-0144] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 10/30/2017] [Indexed: 12/26/2022] Open
Abstract
Lessons Learned. Treatment with BEZ235 has not been shown to demonstrate increased efficacy compared with everolimus and may be associated with a poorer tolerability profile. The hypothesis of dual targeting of the phosphatidylinositol 3‐kinase and mammalian target of rapamycin pathways in patients with advanced pancreatic neuroendocrine tumors may warrant further study using other agents.
Background. This phase II study investigated whether targeting the phosphatidylinositol 3‐kinase (PI3K)/mammalian target of rapamycin (mTOR) pathway via PI3K, mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2) inhibition using BEZ235 may be more effective than mTORC1 inhibition with everolimus in patients with advanced pancreatic neuroendocrine tumors (pNET) who are naïve to mTOR inhibitor therapy. Methods. Patients with advanced pNET were randomized (1:1) to oral BEZ235 400 mg twice daily or oral everolimus 10 mg once daily on a continuous dosing schedule. The primary endpoint was progression‐free survival (PFS). Secondary endpoints included safety, overall response rate (ORR), overall survival (OS), and time to treatment failure. Results. Enrollment in this study was terminated early (62 enrolled of the 140 planned). The median PFS was 8.2 months (95% confidence interval [CI]: 5.3 to not evaluable [NE]) with BEZ235 versus 10.8 months (95% CI: 8.1–NE) with everolimus (hazard ratio 1.53; 95% CI: 0.72–3.25). The most commonly reported all‐grade adverse events (>50% of patients regardless of study treatment relationship) with BEZ235 were diarrhea (90.3%), stomatitis (74.2%), and nausea (54.8%). Conclusion. BEZ235 treatment in mTOR inhibitor‐naïve patients with advanced pNET did not demonstrate increased efficacy compared with everolimus and may be associated with a poorer tolerability profile.
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Affiliation(s)
- Ramon Salazar
- Department of Medical Oncology, Institut Català d'Oncologia-IDIBELL-CIBERONC, Universitat de Barcelona, Barcelona, Spain
| | | | - Steven K Libutti
- Albert Einstein College of Medicine, New York City, New York, USA
| | - Andrew E Hendifar
- David Geffen School of Medicine and Cedars Sinai Medical Center, Los Angeles, California, USA
| | - Ana Custodio
- Department of Medical Oncology, Hospital Universitario La Paz, Madrid, Spain
| | - Rosine Guimbaud
- Department of Digestive Medical Oncology (IUCT-RL), Centre Hospitalier Universitaire de Toulouse, Toulouse, France
| | | | - Sergio Ricci
- Division of Medical Oncology, S Chiara University Hospital, Pisa, Italy
| | - Heinz-Josef Klümpen
- Department of Medical Oncology, Academic Medical Center, Amsterdam, The Netherlands
| | - Jaume Capdevila
- Vall Hebron University Hospital, Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain
| | - Nicholas Reed
- Beatson West of Scotland Cancer Centre, Glasgow, Scotland
| | - Annemiek Walenkamp
- University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Enrique Grande
- Department of Medical Oncology, Hospital Universitario Ramón y Cajal, Madrid, Spain
| | - Sufiya Safina
- Department of Biochemistry, Kazan State Medical University, Kazan, Russia
| | - Tim Meyer
- Royal Free Hospital, London, United Kingdom
| | - Oliver Kong
- Novartis Pharmaceuticals Corporation, East Hanover, New Jersey, USA
| | | | - Ranjana Tavorath
- Novartis Pharmaceuticals Corporation, East Hanover, New Jersey, USA
| | - James C Yao
- The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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18
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Wu SW, Chen PN, Lin CY, Hsieh YS, Chang HR. Everolimus suppresses invasion and migration of renal cell carcinoma by inhibiting FAK activity and reversing epithelial to mesenchymal transition in vitro and in vivo. ENVIRONMENTAL TOXICOLOGY 2017; 32:1888-1898. [PMID: 28258630 DOI: 10.1002/tox.22411] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Revised: 02/13/2017] [Accepted: 02/14/2017] [Indexed: 06/06/2023]
Abstract
Renal cell carcinoma (RCC) is the most common type of kidney cancer in adults and the major cause of mortality in urological cancer. Most patients with RCC are asymptomatic until the disease is advanced and unresectable. In this situation, systemic therapy with immunotherapy or molecularly targeted therapy agents play an important role in therapeutic strategy. Everolimus (EVE), an m-TOR inhibitor, has the potential to inhibit tumor progression at multiple levels and is indicated for the treatment of advanced RCC in patients whose disease has metastasis. In this study, we provide molecular evidence associated with the antimetastatic effect of everolimus by demonstrating the suppression of lung metastasis of 786-O cells in mouse model. This effect was associated with reduced protein expressions of p-FAK (Tyr 925), p-Src (Tyr416), Vimentin, and RhoA and also with increased the E-cadherin protein expression. In summary, these findings provide new insights into the molecular mechanisms involved in the antimetastatic effect of everolimus and are thus valuable in the treatment of metastatic RCC.
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Affiliation(s)
- Sheng-Wen Wu
- School of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Division of Nephrology, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Pei-Ni Chen
- Clinical Laboratory, Chung Shan Medical University Hospital, Taichung, Taiwan
- Institute of Biochemistry and Biotechnology, Chung Shan Medical University, Taichung, Taiwan
| | - Chin-Yin Lin
- Institute of Biochemistry and Biotechnology, Chung Shan Medical University, Taichung, Taiwan
| | - Yih-Shou Hsieh
- Clinical Laboratory, Chung Shan Medical University Hospital, Taichung, Taiwan
- Institute of Biochemistry and Biotechnology, Chung Shan Medical University, Taichung, Taiwan
| | - Horng-Rong Chang
- School of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Division of Nephrology, Chung Shan Medical University Hospital, Taichung, Taiwan
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19
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Dai L, Lin Z, Cao Y, Chen Y, Xu Z, Qin Z. Targeting EIF4F complex in non-small cell lung cancer cells. Oncotarget 2017; 8:55731-55735. [PMID: 28903455 PMCID: PMC5589694 DOI: 10.18632/oncotarget.18413] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 05/29/2017] [Indexed: 12/13/2022] Open
Abstract
Non-small cell lung cancer (NSCLC) accounts for about 85–90% of lung cancer cases, which represents the leading cause of cancer-related death in the world. The majority of lung cancer patients doesn't respond well to conventional chemo-/radio-therapeutic regimens and have a poor prognosis. The recent introduction of targeted therapy and immunotherapy gives new hopes to NSCLC patients, but their outcome/prognosis is far from satisfactory. The translation initiation EIF4F complex has been shown to play important roles in cancer progression, but its functional role and therapeutic effect in lung cancers especially NSCLC remain largely unknown. In this current review, we summarize recent findings regarding the role of EIF4F complex in NSCLC progression and targeted therapy potentials. We also discuss the unanswered questions and future directions in this field.
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Affiliation(s)
- Lu Dai
- Department of Genetics, Louisiana State University Health Sciences Center, Louisiana Cancer Research Center, New Orleans, LA 70112, USA.,Department of Pediatrics, East Hospital, Tongji University School of Medicine, Shanghai 200120, China.,Research Center for Translational Medicine and Key Laboratory of Arrhythmias, East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Zhen Lin
- Department of Pathology, Tulane University Health Sciences Center, Tulane Cancer Center, New Orleans, LA 70112, USA
| | - Yueyu Cao
- Research Center for Translational Medicine and Key Laboratory of Arrhythmias, East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Yihan Chen
- Research Center for Translational Medicine and Key Laboratory of Arrhythmias, East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Zengguang Xu
- Research Center for Translational Medicine and Key Laboratory of Arrhythmias, East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Zhiqiang Qin
- Department of Genetics, Louisiana State University Health Sciences Center, Louisiana Cancer Research Center, New Orleans, LA 70112, USA.,Department of Pediatrics, East Hospital, Tongji University School of Medicine, Shanghai 200120, China.,Research Center for Translational Medicine and Key Laboratory of Arrhythmias, East Hospital, Tongji University School of Medicine, Shanghai 200120, China
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20
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Targeting MYC Dependence by Metabolic Inhibitors in Cancer. Genes (Basel) 2017; 8:genes8040114. [PMID: 28362357 PMCID: PMC5406861 DOI: 10.3390/genes8040114] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 03/23/2017] [Accepted: 03/27/2017] [Indexed: 12/11/2022] Open
Abstract
MYC is a critical growth regulatory gene that is commonly overexpressed in a wide range of cancers. Therapeutic targeting of MYC transcriptional activity has long been a goal, but it has been difficult to achieve with drugs that directly block its DNA-binding ability. Additional approaches that exploit oncogene addiction are promising strategies against MYC-driven cancers. Also, drugs that target metabolic regulatory pathways and enzymes have potential for indirectly reducing MYC levels. Glucose metabolism and oxidative phosphorylation, which can be targeted by multiple agents, promote cell growth and MYC expression. Likewise, modulation of the signaling pathways and protein synthesis regulated by adenosine monophosphate-activated protein kinase (AMPK) and mechanistic target of rapamycin (mTOR) can also be an effective route for suppressing MYC translation. Furthermore, recent data suggest that metabolism of nucleotides, fatty acids and glutamine are exploited to alter MYC levels. Combination therapies offer potential new approaches to overcome metabolic plasticity caused by single agents. Although potential toxicities must be carefully controlled, new inhibitors currently being tested in clinical trials offer significant promise. Therefore, as both a downstream target of metabolism and an upstream regulator, MYC is a prominent central regulator of cancer metabolism. Exploiting metabolic vulnerabilities of MYC-driven cancers is an emerging research area with translational potential.
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21
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Molecular analysis of a male breast cancer patient with prolonged stable disease under mTOR/PI3K inhibitors BEZ235/everolimus. Cold Spring Harb Mol Case Stud 2016; 2:a000620. [PMID: 27148582 PMCID: PMC4849849 DOI: 10.1101/mcs.a000620] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The mTORC1 inhibitor everolimus (Afinitor/RAD001) has been approved for multiple cancer indications, including ER+/HER2− metastatic breast cancer. However, the combination of everolimus with the dual PI3K/mTOR inhibitor BEZ235 was shown to be more efficacious than either everolimus or BEZ235 alone in preclinical models. Herein, we describe a male breast cancer (MBC) patient who was diagnosed with hormone receptor-positive (HR+)/HER2− stage IIIA invasive ductal carcinoma and sequentially treated with chemoradiotherapy and hormonal therapy. Upon the development of metastases, the patient began a 200 mg twice-daily BEZ235 and 2.5 mg weekly everolimus combination regimen. The patient sustained a prolonged stable disease of 18 mo while undergoing the therapy, before his tumor progressed again. Therefore, we sought to both better understand MBC and investigate the underlying molecular mechanisms of the patient's sensitivity and subsequent resistance to the BEZ235/everolimus combination therapy. Genomic and immunohistochemical analyses were performed on samples collected from the initial invasive ductal carcinoma pretreatment and a metastasis postprogression on the BEZ235/everolimus combination treatment. Both tumors were relatively quiet genomically with no overlap to recurrent MBC alterations in the literature. Markers of PI3K/mTOR pathway hyperactivation were not identified in the pretreatment sample, which complements previous reports of HR+ female breast cancers being responsive to mTOR inhibition without this activation. The postprogression sample, however, demonstrated greater than fivefold increased estrogen receptor and pathogenesis-related protein expression, which could have constrained the PI3K/mTOR pathway inhibition by BEZ235/everolimus. Overall, these analyses have augmented the limited episteme on MBC genetics and treatment.
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22
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Dey N, Sun Y, Carlson JH, Wu H, Lin X, Leyland-Jones B, De P. Anti-tumor efficacy of BEZ235 is complemented by its anti-angiogenic effects via downregulation of PI3K-mTOR-HIF1alpha signaling in HER2-defined breast cancers. Am J Cancer Res 2016; 6:714-746. [PMID: 27186427 PMCID: PMC4859880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 02/18/2016] [Indexed: 06/05/2023] Open
Abstract
Activation of the PI3K-mTOR pathway via HER2: HER3-mediated signaling in HER2+ breast cancers pose one of the major threats towards the success of trastuzumab. First, trastuzumab cannot perturb survival/proliferative signals following HER2: HER3 heterodimerization in HER2+ tumor cells. Second, trastuzumab treatment has been reported to cause drug-mediated resistance in over 50% of HER2+ breast cancers. We have reported that treatment with an anti-angiogenic drug imparted a significant anti-tumor advantage when combined with trastuzumab plus pertuzumab in the trastuzumab-resistant model of HER2+ breast cancers (PMID: 23959459). The very fact as revealed by our study that an inclusion of anti-angiogenic drug conferred a significant anti-tumor advantage when combined with dual anti-HER2 therapy clearly indicated a critical and indispensable role of angiogenesis in these tumors. Hence, we hypothesized that BEZ235 a dual PI3K/mTOR inhibitor will have an effect on the tumor as well as the angiogenic stromal compartments. In vitro and in vivo efficacy of BEZ235 was determined in HER2+ trastuzumab-sensitive, trastuzumab-resistant and HER2 amplified/PIK3CA mutated cell lines. BEZ235 alone and in combination with trastuzumab was tested on the tumor as well as stromal compartments. AKT-mTOR signal was suppressed following BEZ235 treatment in a concentration and time-dependent manner. AnnexinV, cl-CASPASE3, SURVIVIN and p-FOXO1 indicated that BEZ235-induced cell death occurred predominantly via an apoptotic pathway. Heregulin-induced HIF1α synthesis was also significantly decreased. Oncoprint data (cBioPortal) representing PAM50 Her2 enriched tumors (TCGA, Nature 2012) and Her2-positive breast tumors (TCGA, cell 2015) showed 91.4% genetic alterations and 79.2% genetic alterations in a set of four genes comprised of PIK3CA, ERBB2, VEGFA and HIF1alpha. The co-occurrence of HIF1alpha with VEGFA in PAM50 Her2 enriched tumors (TCGA, Nature 2012) and the co-occurrence of HIF1alpha with VEGFA pair as well as HIF1alpha with PIK3CA pair in Her2-positive breast tumors (TCGA, cell 2015) were found statistically significant. In xenograft models, BEZ235 blocked tumor growth and decreased Ki67, CD31, p-AKT, p-S6RP, p-4EBP1 IHC-expressions. These decreases were more pronounced when BEZ235 was combined with trastuzumab in HER2+/trastuzumab-sensitive, trastuzumab-resistant and HER2+/PIK3CA mutated models. We demonstrated that combined targeting of HER2 and the PI3K-AKT-mTOR pathway is superior to HER2-directed therapy alone. Mechanistically the inhibition of tumor-induced angiogenesis by BEZ235 caused by the down-regulation of PI3K-mTOR-HIF1alpha signaling irrespective of the trastuzumab-sensitivity status of HER2+ breast cancers proving evidence for the first time that the inhibition of angiogenesis is an important component of the anti-tumor efficacy of BEZ235 in HER2 defined breast cancers.
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Affiliation(s)
- Nandini Dey
- Genomic Oncology, Avera Cancer InstituteSioux Falls, SD
- Departmental of Internal Medicine, University of South DakotaSioux Falls, SD
| | - Yuliang Sun
- Genomic Oncology, Avera Cancer InstituteSioux Falls, SD
| | | | - Hui Wu
- Emory school of Medicine, Emory UniversityAtlanta, GA
| | - Xiaoqian Lin
- Genomic Oncology, Avera Cancer InstituteSioux Falls, SD
| | - Brian Leyland-Jones
- Genomic Oncology, Avera Cancer InstituteSioux Falls, SD
- Departmental of Internal Medicine, University of South DakotaSioux Falls, SD
| | - Pradip De
- Genomic Oncology, Avera Cancer InstituteSioux Falls, SD
- Departmental of Internal Medicine, University of South DakotaSioux Falls, SD
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Owonikoko TK. Inhibitors of mTOR pathway for cancer therapy, moving on from rapalogs to TORKinibs. Cancer 2015; 121:3390-2. [DOI: 10.1002/cncr.29424] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 03/31/2015] [Indexed: 11/08/2022]
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Passacantilli I, Capurso G, Archibugi L, Calabretta S, Caldarola S, Loreni F, Delle Fave G, Sette C. Combined therapy with RAD001 e BEZ235 overcomes resistance of PET immortalized cell lines to mTOR inhibition. Oncotarget 2015; 5:5381-91. [PMID: 25026292 PMCID: PMC4170632 DOI: 10.18632/oncotarget.2111] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Pancreatic endocrine tumors (PETs) are characterised by an indolent behaviour in terms of tumor growth. However, most patients display metastasis at diagnosis and no cure is currently available. Since the PI3K/AKT/mTOR axis is deregulated in PETs, the mTOR inhibitor RAD001 represents the first line treatment. Nevertheless, some patients do not respond to treatments and most acquire resistance. Inhibition of mTOR leads to feedback re-activation of PI3K activity, which may promote resistance to RAD001. Thus, PI3K represents a novel potential target for PETs. We tested the impact of three novel PI3K inhibitors (BEZ235, BKM120 and BYL719) on proliferation of PET cells that are responsive (BON-1) or unresponsive (QGP-1) to RAD001. BEZ235 was the most efficient in inhibiting proliferation in PET cells. Furthermore, combined treatment with BEZ235 and RAD001 exhibited synergic effects and was also effective in BON-1 that acquired resistance to RAD001 (BON-1 RR). Analysis of PI3K/AKT/mTOR pathway showed that RAD001 and BEZ235 only partially inhibited mTOR-dependent phosphorylation of 4EBP1. By contrast, combined therapy with the two inhibitors strongly inhibited phosphorylation of 4EBP1, assembly of the translational initiation complex and protein synthesis. Thus, combined treatment with BEZ235 may represent suitable therapy to counteract primary and acquired resistance to RAD001 in PETs.
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Affiliation(s)
- Ilaria Passacantilli
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy; Digestive & Liver Disease Unit, University of La Sapienza, Rome, Italy
| | - Gabriele Capurso
- Digestive & Liver Disease Unit, University of La Sapienza, Rome, Italy
| | - Livia Archibugi
- Digestive & Liver Disease Unit, University of La Sapienza, Rome, Italy
| | - Sara Calabretta
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy; Digestive & Liver Disease Unit, University of La Sapienza, Rome, Italy
| | - Sara Caldarola
- Department of Biology, University of Rome Tor Vergata, Rome, Italy
| | - Fabrizio Loreni
- Department of Biology, University of Rome Tor Vergata, Rome, Italy
| | | | - Claudio Sette
- Department of Biomedicine and Prevention, University of Rome Tor Vergata, Rome, Italy; Laboratory of Neuroembryology, Fondazione Santa Lucia, Rome, Italy
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Sun Z, Li Q, Zhang S, Chen J, Huang L, Ren J, Chang Y, Liang Y, Wu G. NVP-BEZ235 overcomes gefitinib-acquired resistance by down-regulating PI3K/AKT/mTOR phosphorylation. Onco Targets Ther 2015; 8:269-77. [PMID: 25674002 PMCID: PMC4321659 DOI: 10.2147/ott.s62128] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Background Patients harboring activating mutations in epidermal growth factor receptors (EGFR) are particularly sensitive to EGFR tyrosine kinase inhibitors (TKIs). However, most patients develop an acquired resistance after a period of about 10 months. This study focuses on the therapeutic effect of NVP-BEZ235, a dual inhibitor of phosphatidylinositol-3-kinase/mammalian target of rapamycin (PI3K/mTOR), in gefitinib-resistant non-small cell lung cancer. Methods H1975 cell line was validated as a gefitinib-resistant cell model by the nucleotide-sequence analysis. We used the 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay to detect the growth of H1975 cell line in vitro. H1975 cells’ migration was detected by the migration assay. Xenograft models were used to investigate the growth of gefitinib-resistant non-small cell lung cancer in vivo. Western blot and immunohistochemical analysis were used to investigate the level of PI3K/protein kinase B(AKT)/mTOR signaling pathway proteins. Results We show that NVP-BEZ235 effectively inhibited the growth of H1975 cells in vivo as well as in vitro. Similarly, H1975 cell migration was reduced by NVP-BEZ235. Further experiments revealed that NVP-BEZ235 attenuated the phosphorylation of PI3K/AKT/mTOR signaling pathway proteins. Conclusion Taken together, we suggest that NVP-BEZ235 inhibits gefitinib-resistant tumor growth by downregulating PI3K/AKT/mTOR phosphorylation.
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Affiliation(s)
- Zhihua Sun
- Oncology department, Xiangyang central Hospital, Xiangyang, Hubei, People's Republic of China
| | - Qiuhui Li
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Sheng Zhang
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Jing Chen
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Lili Huang
- Radiation Oncology Department, Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, Guangdong, People's Republic of China
| | - Jinghua Ren
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Yu Chang
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Yichen Liang
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Gang Wu
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
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Sun Z, Wang Z, Liu X, Wang D. New development of inhibitors targeting the PI3K/AKT/mTOR pathway in personalized treatment of non-small-cell lung cancer. Anticancer Drugs 2015; 26:1-14. [PMID: 25304988 DOI: 10.1097/cad.0000000000000172] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Lung cancer is the leading cause of cancer-related death worldwide. Non-small-cell lung cancer (NSCLC) is the most common pathological type of lung cancer, divided into squamous cell carcinoma and adenocarcinoma. Despite better techniques of surgery and improvement in adjuvant and neoadjuvant therapy, the median survival of advanced NSCLC is only 8-10 months. With increased understanding of molecular alternations in NSCLC, considerable efforts have focused on the development of personalized molecular-targeted therapies. The PI3K/AKT/mTOR pathway regulates tumor development, growth, and proliferation of NSCLC. Various novel inhibitors targeting this pathway have been identified in preclinical studies or clinical trials. Some genetic alternations may be considered sensitive or resistant biomarkers to these inhibitors. Sometimes, upregulation of RTK and the downstream PI3K pathway or upregulation of the ERK pathway by compensatory feedback reactivation in response to these inhibitors also lead to drug resistance. Therefore, combination therapy of these inhibitors and other targeted inhibitors such as EGFR-TKI or MEK inhibitors according to genetic status and categories of inhibitors is required to enhance the efficacy of these inhibitors. Here, we reviewed the genetic status of the PI3K/AKT/mTOR pathway in NSCLC and the novel inhibitors targeting this pathway in preclinical or clinical studies, exploring the possible genetic alternations related to different inhibitors and the means to enhance the antitumor effect in NSCLC.
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Affiliation(s)
- Zhenguo Sun
- Department of Thoracic Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, China
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Abstract
The mammalian target of rapamycin (mTOR) has emerged as a potential target for drug development, particularly due to the fact that it plays such a crucial role in cancer biology. In addition, next-generation mTOR inhibitors have become available, marking an exciting new phase in mTOR-based therapy. However, the verdict on their therapeutic efectiveness remains unclear. Here we review phosphatidylinositol-3-kinase (PI3K)/Akt/mTOR signaling as one of the primary mechanisms for sustaining tumor outgrowth and metastasis, recent advances in the development of mTOR inhibitors, and current studies addressing mTOR activation/inhibition in colorectal cancer (CRC). We will also discuss our recent comparative study of diferent mTOR inhibitors in a population of colon cancer stem cells (CSCs), and current major challenges for achieving individualized drug therapy using kinase inhibitors.
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28
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Lin Y, Wang X, Jin H. EGFR-TKI resistance in NSCLC patients: mechanisms and strategies. Am J Cancer Res 2014; 4:411-435. [PMID: 25232485 PMCID: PMC4163608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 08/16/2014] [Indexed: 06/03/2023] Open
Abstract
The epidermal growth factor receptor (EGFR) is a kind of receptor tyrosine kinase (RTK) that plays a critical role in the initiation and development of malignant tumors via modulating downstream signaling pathways. In non-small cell lung cancer (NSCLC), the activating mutations located in the tyrosine kinase domains of EGFR have been demonstrated in multiple researches as the "Achilles' heel" of this deadly disease since they could be well-targeted by epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs). However, it's still too early to celebrate since the first-generation EGFR-TKIs such as gefitinib and erlotinib have only achieved limited clinical benefits and acquired resistance to this kind of drugs occurred inevitably in almost all the NSCLC patients. In order to make the most of EGFR-TKIs and develop more effective regimens for the NSCLC patients, researchers majoring in different aspects start a battle against EGFR-TKI resistance. Challenging as it is, we still progress stably and step firmly toward the final victory. This review will summarize the major mechanisms of acquired resistance to EGFR-TKIs, and then discuss the development of rationally designed molecular target drugs in accordance with each mechanism, in the hope of shedding light on the great achievements we have obtained and tough obstacles we have to overcome in the battle against this deadly disease.
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Affiliation(s)
- Yuxin Lin
- Department of Medical Oncology, Sir Runrun Shaw Hospital, Medical School of Zhejiang University Hangzhou, China
| | - Xian Wang
- Department of Medical Oncology, Sir Runrun Shaw Hospital, Medical School of Zhejiang University Hangzhou, China
| | - Hongchuan Jin
- Department of Medical Oncology, Sir Runrun Shaw Hospital, Medical School of Zhejiang University Hangzhou, China
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Fumarola C, Bonelli MA, Petronini PG, Alfieri RR. Targeting PI3K/AKT/mTOR pathway in non small cell lung cancer. Biochem Pharmacol 2014; 90:197-207. [DOI: 10.1016/j.bcp.2014.05.011] [Citation(s) in RCA: 271] [Impact Index Per Article: 27.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 05/16/2014] [Accepted: 05/16/2014] [Indexed: 01/08/2023]
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Geng L, Sun B, Gao B, Wang Z, Quan C, Wei F, Fang XD. MicroRNA-103 promotes colorectal cancer by targeting tumor suppressor DICER and PTEN. Int J Mol Sci 2014; 15:8458-72. [PMID: 24828205 PMCID: PMC4057742 DOI: 10.3390/ijms15058458] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Revised: 04/17/2014] [Accepted: 04/18/2014] [Indexed: 12/24/2022] Open
Abstract
MicroRNAs (miRNAs) are a class of small, noncoding RNAs that act as key regulators in various physiological and pathological processes. However, the regulatory mechanisms for miRNAs in colorectal cancer remain largely unknown. Here, we found that miR-103 is up-regulated in colorectal cancer and its overexpression is closely associated with tumor proliferation and migration. In addition, repressing the expression of miR-103 apparently inhibits colorectal cancer cell proliferation and migration in vitro and HCT-116 xenograft tumor growth in vivo. Subsequent software analysis and dual-luciferase reporter assay identified two tumor suppressor genes DICER and PTEN as direct targets of miR-103, and up-regulation of DICER and PTEN obtained similar results to that occurred in the silencing of miR-103. In addition, restoration of DICER and PTEN can inhibit miR-103-induced colorectal cancer cell proliferation and migration. Our data collectively demonstrate that miR-103 is an oncogene miRNA that promotes colorectal cancer proliferation and migration through down-regulation of the tumor suppressor genes DICER and PTEN. Thus, miR-103 may represent a new potential diagnostic and therapeutic target for colorectal cancer treatment.
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Affiliation(s)
- Li Geng
- Department of General Surgery, the Second Hospital of Jilin University, Changchun 130041, Jilin, China.
| | - Bing Sun
- Department of Neurology, Changchun Central Hospital, Changchun 130041, Jilin, China.
| | - Bo Gao
- Department of General Surgery, the Second Hospital of Jilin University, Changchun 130041, Jilin, China.
| | - Zheng Wang
- Department of General Surgery, the Second Hospital of Jilin University, Changchun 130041, Jilin, China.
| | - Cheng Quan
- Department of General Surgery, the Second Hospital of Jilin University, Changchun 130041, Jilin, China.
| | - Feng Wei
- Department of Hepatobiliary and Pancreas Surgery, the First Hospital, Jilin University, Changchun 130021, Jilin, China.
| | - Xue-Dong Fang
- Department of General Surgery, the Second Hospital of Jilin University, Changchun 130041, Jilin, China.
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31
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Tsao AS, Roth JA. Novel and Emerging Agents in NSCLC. Lung Cancer 2014. [DOI: 10.1002/9781118468791.ch30] [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]
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Ou DL, Lee BS, Lin LI, Liou JY, Liao SC, Hsu C, Cheng AL. Vertical blockade of the IGFR- PI3K/Akt/mTOR pathway for the treatment of hepatocellular carcinoma: the role of survivin. Mol Cancer 2014; 13:2. [PMID: 24387108 PMCID: PMC3882101 DOI: 10.1186/1476-4598-13-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Accepted: 12/27/2013] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND To explore whether combining inhibitors that target the insulin-like growth factor receptor (IGFR)/PI3K/Akt/mTOR signaling pathway (vertical blockade) can improve treatment efficacy for hepatocellular carcinoma (HCC). METHODS HCC cell lines (including Hep3B, Huh7, and PLC5) and HUVECs (human umbilical venous endothelial cells) were tested. The molecular targeting therapy agents tested included NVP-AEW541 (IGFR kinase inhibitor), MK2206 (Akt inhibitor), BEZ235 (PI3K/mTOR inhibitor), and RAD001 (mTOR inhibitor). Potential synergistic antitumor effects were tested by median dose-effect analysis in vitro and by xenograft HCC models. Apoptosis was analyzed by flow cytometry (sub-G1 fraction analysis) and Western blotting. The activities of pertinent signaling pathways and expression of apoptosis-related proteins were measured by Western blotting. RESULTS Vertical blockade induced a more sustained inhibition of PI3K/Akt/mTOR signaling activities in all the HCC cells and HUVEC tested. Synergistic apoptosis-inducing effects, however, varied among different cell lines and drug combinations and were most prominent when NVP-AEW541 was combined with MK2206. Using an apoptosis array, we identified survivin as a potential downstream mediator. Over-expression of survivin in HCC cells abolished the anti-tumor synergy between NVP-AEW541 and MK2206, whereas knockdown of survivin improved the anti-tumor effects of all drug combinations tested. In vivo by xenograft studies confirmed the anti-tumor synergy between NVP-AEW541 and MK2206 and exhibited acceptable toxicity profiles. CONCLUSIONS Vertical blockade of the IGFR/PI3K/Akt/mTOR pathway has promising anti-tumor activity for HCC. Survivin expression may serve as a biomarker to predict treatment efficacy.
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Affiliation(s)
- Da-Liang Ou
- Graduate Institute of Oncology, College of Medicine, National Taiwan University, Taipei, Taiwan
- National Center of Excellence for Clinical Trial and Research, National Taiwan University Hospital, Taipei, Taiwan
| | - Bin-Shyun Lee
- National Center of Excellence for Clinical Trial and Research, National Taiwan University Hospital, Taipei, Taiwan
- Department of Oncology, National Taiwan University Hospital, 7 Chung-Shan South Road, Taipei, 100, Taiwan
| | - Liang-In Lin
- Graduate Institute of Clinical Laboratory Sciences and Medical Biotechnology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Jun-Yang Liou
- Institute of Cellular and System Medicine, National Health Research Institutes, Zhunan, Miaoli County, Taiwan
| | - Sheng-Chieh Liao
- National Center of Excellence for Clinical Trial and Research, National Taiwan University Hospital, Taipei, Taiwan
- Department of Oncology, National Taiwan University Hospital, 7 Chung-Shan South Road, Taipei, 100, Taiwan
| | - Chiun Hsu
- Graduate Institute of Oncology, College of Medicine, National Taiwan University, Taipei, Taiwan
- Department of Oncology, National Taiwan University Hospital, 7 Chung-Shan South Road, Taipei, 100, Taiwan
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Ann-Lii Cheng
- Graduate Institute of Oncology, College of Medicine, National Taiwan University, Taipei, Taiwan
- Department of Oncology, National Taiwan University Hospital, 7 Chung-Shan South Road, Taipei, 100, Taiwan
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
- Graduate Institute of Toxicology, College of Medicine, National Taiwan University, Taipei, Taiwan
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Li X, Tong LJ, Ding J, Meng LH. Systematic combination screening reveals synergism between rapamycin and sunitinib against human lung cancer. Cancer Lett 2014; 342:159-66. [DOI: 10.1016/j.canlet.2013.08.046] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Revised: 08/29/2013] [Accepted: 08/31/2013] [Indexed: 10/26/2022]
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Wang Y, Yu Q, He X, Romigh T, Altemus J, Eng C. Activation of AR sensitizes breast carcinomas to NVP-BEZ235's therapeutic effect mediated by PTEN and KLLN upregulation. Mol Cancer Ther 2013; 13:517-27. [PMID: 24356815 DOI: 10.1158/1535-7163.mct-13-0655] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
NVP-BEZ235 is a newly developed dual PI3K/mTOR inhibitor, being tested in multiple clinical trials, including breast cancer. NVP-BEZ235 selectively induces cell growth inhibition in a subset, but not all, breast cancer cell lines. However, it remains a challenge to distinguish between sensitive and resistant tumors, particularly in the pretreatment setting. Here, we used ten breast cancer cell lines to compare NVP-BEZ235 sensitivity and in the context of androgen receptor (AR) activation during NVP-BEZ235 treatment. We also used female SCID mice bearing breast tumor xenografts to investigate the beneficial effect of dihydrotestosterone/NVP-BEZ235 combination treatment compared with each alone. We found that AR-positive breast cancer cell lines are much more sensitive to NVP-BEZ235 compared with AR-negative cells, regardless of PTEN or PI3KCA status. Reintroducing AR expression in NVP-BEZ235 nonresponsive AR-negative cells restored the response. DHT/NVP-BEZ235 combination not only resulted in a more significant growth inhibition than either drug alone, but also achieved tumor regression and complete responses for AR(+)/ER(+) tumors. This beneficial effect was mediated by dihydrotestosterone (DHT)-induced PTEN and KLLN expression. Furthermore, DHT could also reverse NVP-BEZ235-induced side effects such as skin rash and weight loss. Our data suggest that AR expression may be an independent predictive biomarker for response to NVP-BEZ235. AR induction could add benefit during NVP-BEZ235 treatment in patients, especially with AR(+)/ER(+) breast carcinomas.
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Affiliation(s)
- Yu Wang
- Corresponding Author: Charis Eng, Cleveland Clinic, 9500 Euclid Avenue, NE-50, Cleveland, OH 44195.
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Wang Q, Luo C, Wu X, Du H, Song X, Fan Y. hepaCAM and p-mTOR Closely Correlate in Bladder Transitional Cell Carcinoma and hepaCAM Expression Inhibits Proliferation via an AMPK/mTOR Dependent Pathway in Human Bladder Cancer Cells. J Urol 2013; 190:1912-8. [DOI: 10.1016/j.juro.2013.05.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/06/2013] [Indexed: 11/24/2022]
Affiliation(s)
- Qiuju Wang
- Key Laboratory of Diagnostics Medicine designated by the Ministry of Education, Chongqing Medical University and Department of Urology, First Affiliated Hospital of Chongqing Medical University (XW), Chongqing, People's Republic of China
| | - Chunli Luo
- Key Laboratory of Diagnostics Medicine designated by the Ministry of Education, Chongqing Medical University and Department of Urology, First Affiliated Hospital of Chongqing Medical University (XW), Chongqing, People's Republic of China
| | - Xiaohou Wu
- Key Laboratory of Diagnostics Medicine designated by the Ministry of Education, Chongqing Medical University and Department of Urology, First Affiliated Hospital of Chongqing Medical University (XW), Chongqing, People's Republic of China
| | - Hongfei Du
- Key Laboratory of Diagnostics Medicine designated by the Ministry of Education, Chongqing Medical University and Department of Urology, First Affiliated Hospital of Chongqing Medical University (XW), Chongqing, People's Republic of China
| | - Xuedong Song
- Key Laboratory of Diagnostics Medicine designated by the Ministry of Education, Chongqing Medical University and Department of Urology, First Affiliated Hospital of Chongqing Medical University (XW), Chongqing, People's Republic of China
| | - Yanru Fan
- Key Laboratory of Diagnostics Medicine designated by the Ministry of Education, Chongqing Medical University and Department of Urology, First Affiliated Hospital of Chongqing Medical University (XW), Chongqing, People's Republic of China
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Everolimus in combination with letrozole inhibit human breast cancer MCF-7/Aro stem cells via PI3K/mTOR pathway: an experimental study. Tumour Biol 2013; 35:1275-86. [DOI: 10.1007/s13277-013-1170-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Accepted: 08/29/2013] [Indexed: 01/08/2023] Open
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Cagle PT, Allen TC, Olsen RJ. Lung Cancer Biomarkers: Present Status and Future Developments. Arch Pathol Lab Med 2013; 137:1191-8. [DOI: 10.5858/arpa.2013-0319-cr] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The publication of the “Molecular Testing Guideline for Selection of Lung Cancer Patients for EGFR and ALK Tyrosine Kinase Inhibitors: Guideline From the College of American Pathologists, International Association for the Study of Lung Cancer, and Association for Molecular Pathology” has now provided a guideline for biomarker testing for first-generation lung cancer tyrosine kinase inhibitors. Biomarker testing has forever altered the role of pathologists in the management of patients with lung cancer. Current, unresolved issues in the precision medicine of lung cancer will be addressed by the development of new biomarker tests, new drugs, and new test technologies and by improvement in the cost to benefit ratio of biomarker testing.
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Affiliation(s)
- Philip T. Cagle
- From the Department of Pathology and Genomic Medicine, The Methodist Hospital, Houston, Texas, and the Department of Pathology and Laboratory Medicine, Weill Medical College of Cornell University, New York, New York (Drs Cagle and Olsen); and
- the Department of Pathology, The University of Texas Health Science Center at Tyler (Dr Allen)
| | - Timothy Craig Allen
- From the Department of Pathology and Genomic Medicine, The Methodist Hospital, Houston, Texas, and the Department of Pathology and Laboratory Medicine, Weill Medical College of Cornell University, New York, New York (Drs Cagle and Olsen); and
- the Department of Pathology, The University of Texas Health Science Center at Tyler (Dr Allen)
| | - Randall J. Olsen
- From the Department of Pathology and Genomic Medicine, The Methodist Hospital, Houston, Texas, and the Department of Pathology and Laboratory Medicine, Weill Medical College of Cornell University, New York, New York (Drs Cagle and Olsen); and
- the Department of Pathology, The University of Texas Health Science Center at Tyler (Dr Allen)
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Sun JM, Kim JR, Do IG, Lee SY, Lee J, Choi YL, Ahn JS, Ahn MJ, Park K. A phase-1b study of everolimus plus paclitaxel in patients with small-cell lung cancer. Br J Cancer 2013; 109:1482-7. [PMID: 23963141 PMCID: PMC3776982 DOI: 10.1038/bjc.2013.467] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 07/12/2013] [Accepted: 07/21/2013] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The mammalian target of rapamycin (mTOR) pathway is dysregulated in small-cell lung cancer (SCLC) and everolimus is an oral mTOR inhibitor. METHODS This phase-1b study assessed everolimus safety at the levels of 2.5, 5, or 10 mg once daily in combination with paclitaxel (175 mg m(-2)) once every 3 weeks in previously treated SCLC patients. The primary end point was to determine the maximum tolerated dose of everolimus. RESULTS Among 21 enrolled patients, common drug-related adverse events were anaemia, neutropenia, thrombocytopenia, pain, hyperglycemia, and stomatitis. Out of 11 evaluable patients treated with everolimus at the level of 5 mg, 1 patient experienced dose-limiting toxicity (DLT) of grade 4 febrile neutropenia and grade 3 thrombocytopenia. The other two DLTs (grade 4 thrombocytopenia and grade 3 hyperglycemia) occurred in two out of three patients receiving everolimus 10 mg. The overall objective response rate was 28%. CONCLUSION Everolimus showed an acceptable safety profile and preliminary antitumour activity at the dose of 5 mg once daily when combined with 3-weekly paclitaxel 175 mg m(-2) in patients with SCLC.
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Affiliation(s)
- J M Sun
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangnam-gu, Seoul 135-710, Korea
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Yasumizu Y, Miyajima A, Kosaka T, Miyazaki Y, Kikuchi E, Oya M. Dual PI3K/mTOR inhibitor NVP-BEZ235 sensitizes docetaxel in castration resistant prostate cancer. J Urol 2013; 191:227-34. [PMID: 23954373 DOI: 10.1016/j.juro.2013.07.101] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/29/2013] [Indexed: 12/21/2022]
Abstract
PURPOSE Effective therapeutic strategies that can achieve long-term improvement in patients with castration resistant prostate cancer are urgently needed. We recently reported that the activated PI3K/Akt/mTOR signaling pathway induced by docetaxel explains resistance to docetaxel in castration resistant prostate cancer. In this study we explored the efficacy of NVP-BEZ235, a dual PI3K and mTORC1/2 inhibitor, for docetaxel resistant castration resistant prostate cancer. MATERIALS AND METHODS We used the 2 human castration resistant prostate cancer cell lines C4-2 and C4-2AT6. At our laboratory C4-2AT6 cells were established from C4-2 under androgen ablated treatment for 6 months. We investigated the efficacy of NVP-BEZ235 monotherapy and NVP-BEZ235 combined with docetaxel in vitro and in vivo. RESULTS Increased phosphorylated Akt in C4-2AT6 cells was significantly inhibited by NVP-BEZ235 in a dose and time dependent manner. WST cell proliferation assay results in C4-2AT6 cells revealed that combined administration of NVP-BEZ235 and docetaxel had significant, synergistically greater cytotoxicity than NVP-BEZ235 or docetaxel monotherapy. Combined NVP-BEZ235 (40 mg/kg) and docetaxel (4 mg/kg) in vivo in a castrated mouse xenograft model inhibited C4-2AT6 tumor growth to a greater degree than in the monotherapy groups. Also, NVP-BEZ235 showed significant efficacy with docetaxel at a low concentration in vivo, suggesting that NVP-BEZ235 effectively decreased resistance to docetaxel. CONCLUSIONS Results suggest that inhibition of the PI3K/Akt/mTOR signaling pathway by NVP-BEZ235 can overcome docetaxel resistance in human castration resistant prostate cancer. Our findings provide a molecular basis for the clinical use of combined administration of NVP-BEZ235 and docetaxel in patients with castration resistant prostate cancer.
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Affiliation(s)
- Yota Yasumizu
- Department of Urology, Keio University School of Medicine, Tokyo, Japan
| | - Akira Miyajima
- Department of Urology, Keio University School of Medicine, Tokyo, Japan.
| | - Takeo Kosaka
- Department of Urology, Keio University School of Medicine, Tokyo, Japan
| | - Yasumasa Miyazaki
- Department of Urology, Keio University School of Medicine, Tokyo, Japan
| | - Eiji Kikuchi
- Department of Urology, Keio University School of Medicine, Tokyo, Japan
| | - Mototsugu Oya
- Department of Urology, Keio University School of Medicine, Tokyo, Japan
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Abstract
This article presents an overview of the PI3K/Akt/mTOR signaling pathway. As a central regulator of cell growth, protein translation, survival, and metabolism, activation of this signaling pathway contributes to the pathogenesis of many tumor types. Biochemical and genetic aberrations of this pathway observed in various cancer types are explored. Last, pathway inhibitors both in development and already approved by the Food and Drug Administration are discussed.
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Genotype directed therapy in murine mismatch repair deficient tumors. PLoS One 2013; 8:e68817. [PMID: 23935891 PMCID: PMC3720855 DOI: 10.1371/journal.pone.0068817] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Accepted: 06/04/2013] [Indexed: 01/12/2023] Open
Abstract
The PI3K/AKT/mTOR pathway has frequently been found activated in human tumors. We show that in addition to Wnt signaling dysfunction, the PI3K/AKT/mTOR pathway is often upregulated in mouse Msh2(-/-) initiated intestinal tumors. NVP-BEZ235 is a dual PI3K/mTOR inhibitor toxic to many cancer cell lines and currently involved in clinical trials. We have treated two mouse models involving Msh2 that develop small intestinal and/or colonic tumors with NVP-BEZ235, and a subset of animals with NVP-BEZ235 and MEK inhibitor ADZ4266. The disease phenotype has been followed with pathology, (18)F FDG PET imaging, and endoscopy. Intestinal adenocarcinomas are significantly decreased in multiplicity by both drug regimens. The majority of tumors treated with combined therapy regress significantly, while a small number of highly progressed tumors persist. We have examined PTEN, AKT, MEK 1&2, MAPK, S6K, mTOR, PDPK1, and Cyclin D1 and find variable alterations that include downregulation of PTEN, upregulation of AKT and changes in its phosphorylated forms, upregulation of pMEK 1&2, p42p44MAPK, pS6K, and Cyclin D1. Apoptosis has been found intact in some tumors and not in others. Our data indicate that NVP-BEZ235 alone and in combination with ADZ4266 are effective in treating a proportion of colorectal cancers, but that highly progressed resistant tumors grow in the presence of the drugs. Pathways upregulated in some resistant tumors also include PDPK1, suggesting that metabolic inhibitors may also be useful in treating these tumors.
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Wang YL, Zhu BJ, Qi ZZ, Wang HJ, Zhou XD. Akt1 enhances CA916798 expression through mTOR pathway. PLoS One 2013; 8:e62327. [PMID: 23667466 PMCID: PMC3648559 DOI: 10.1371/journal.pone.0062327] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 03/20/2013] [Indexed: 01/07/2023] Open
Abstract
Multi-drug resistance leads to the failure of chemotherapy for cancers. Our previous study showed that overexpression of CA916798 led to multi-drug resistance. However, the underlying mechanisms remain unknown. In the current study, we observed that the levels of phosphorylated AKT, phosphorylated mTOR and CA916798 all increased in the drug resistant human adenocarcinoma samples and paralleled with the change of drug resistance. The results of immunofluorescence and Co-IP indicated that the positive correlation of CA916798 expression with AKT1 activation might be associated with drug resistance of lung adenocarcinoma. Furthermore, AKT1 stimulated CA916798 expression through mTOR pathway in both A549 and A549/CDDP cell lines, which was also observed in the xenografted tumor in nude mice. The results showed that CA916798 located in the downstream of PI3K/AKT/mTOR pathway. Inhibition of PI3K by LY294002 could efficiently reduce CA916798 expression and tumor size in vivo as well. Additionally, LY294002 combined with rapamycin inhibited CA916798 expression and tumor size stronger than LY294002 alone. Our findings may also provide a new explanation for synergistic anti-tumor effects of PI3K and mTORC1 inhibitors.
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Affiliation(s)
- Yu-Liang Wang
- Department of Respiratory Medicine, Southwest Hospital, The Third Military Medical University, Chongqing, China
| | - Bing-Jing Zhu
- Department of Respiratory Medicine, Southwest Hospital, The Third Military Medical University, Chongqing, China
| | - Zhan-Zhong Qi
- Department of Respiratory Medicine, Southwest Hospital, The Third Military Medical University, Chongqing, China
| | - Hai-Jing Wang
- Department of Respiratory Medicine, Southwest Hospital, The Third Military Medical University, Chongqing, China
| | - Xiang-Dong Zhou
- Department of Respiratory Medicine, Southwest Hospital, The Third Military Medical University, Chongqing, China
- * E-mail:
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Radiosensitization of Glioblastoma Cell Lines by the Dual PI3K and mTOR Inhibitor NVP-BEZ235 Depends on Drug-Irradiation Schedule. Transl Oncol 2013; 6:169-79. [PMID: 23544169 DOI: 10.1593/tlo.12364] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 01/10/2013] [Accepted: 01/11/2013] [Indexed: 12/13/2022] Open
Abstract
Previous studies have shown that the dual phosphatidylinositide 3-kinase/mammalian target of rapamycin (PI3K/mTOR) inhibitor NVP-BEZ235 radiosensitizes tumor cells if added shortly before ionizing radiation (IR) and kept in culture medium thereafter. The present study explores the impact of inhibitor and IR schedule on the radiosensitizing ability of NVP-BEZ235 in four human glioblastoma cell lines. Two different drug-IR treatment schedules were compared. In schedule I, cells were treated with NVP-BEZ235 for 24 hours before IR and the drug was removed before IR. In schedule II, the cells were exposed to NVP-BEZ235 1 hour before, during, and up to 48 hours after IR. The cellular response was analyzed by colony counts, expression of marker proteins of the PI3K/AKT/mTOR pathway, cell cycle, and DNA damage. We found that under schedule I, NVP-BEZ235 did not radiosensitize cells, which were mostly arrested in G1 phase during IR exposure. In addition, the drug-pretreated and irradiated cells exhibited less DNA damage but increased expressions of phospho-AKT and phospho-mTOR, compared to controls. In contrast, NVP-BEZ235 strongly enhanced the radiosensitivity of cells treated according to schedule II. Possible reasons of radiosensitization by NVP-BEZ235 under schedule II might be the protracted DNA repair, prolonged G2/M arrest, and, to some extent, apoptosis. In addition, the PI3K pathway was downregulated by the NVP-BEZ235 at the time of irradiation under schedule II, as contrasted with its activation in schedule I. We found that, depending on the drug-IR schedule, the NVP-BEZ235 can act either as a strong radiosensitizer or as a cytostatic agent in glioblastoma cells.
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McCubrey JA, Steelman LS, Chappell WH, Abrams SL, Franklin RA, Montalto G, Cervello M, Libra M, Candido S, Malaponte G, Mazzarino MC, Fagone P, Nicoletti F, Bäsecke J, Mijatovic S, Maksimovic-Ivanic D, Milella M, Tafuri A, Chiarini F, Evangelisti C, Cocco L, Martelli AM. Ras/Raf/MEK/ERK and PI3K/PTEN/Akt/mTOR cascade inhibitors: how mutations can result in therapy resistance and how to overcome resistance. Oncotarget 2013; 3:1068-111. [PMID: 23085539 PMCID: PMC3717945 DOI: 10.18632/oncotarget.659] [Citation(s) in RCA: 256] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The Ras/Raf/MEK/ERK and PI3K/PTEN/Akt/mTOR cascades are often activated by genetic alterations in upstream signaling molecules such as receptor tyrosine kinases (RTK). Targeting these pathways is often complex and can result in pathway activation depending on the presence of upstream mutations (e.g., Raf inhibitors induce Raf activation in cells with wild type (WT) RAF in the presence of mutant, activated RAS) and rapamycin can induce Akt activation. Targeting with inhibitors directed at two constituents of the same pathway or two different signaling pathways may be a more effective approach. This review will first evaluate potential uses of Raf, MEK, PI3K, Akt and mTOR inhibitors that have been investigated in pre-clinical and clinical investigations and then discuss how cancers can become insensitive to various inhibitors and potential strategies to overcome this resistance.
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Affiliation(s)
- James A McCubrey
- Department of Microbiology and Immunology, Brody School of Medicine at East Carolina University, Greenville, NC, USA
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Induction of apoptosis by luteolin involving akt inactivation in human 786-o renal cell carcinoma cells. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:109105. [PMID: 23476679 PMCID: PMC3576787 DOI: 10.1155/2013/109105] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2012] [Revised: 12/23/2012] [Accepted: 01/02/2013] [Indexed: 12/02/2022]
Abstract
There is a growing interest in the health-promoting effects of natural substances obtained from plants. Although luteolin has been identified as a potential therapeutic and preventive agent for cancer because of its potent cancer cell-killing activity, the molecular mechanisms have not been well elucidated. This study provides evidence of an alternative target for luteolin and sheds light on the mechanism of its physiological benefits. Treatment of 786-O renal cell carcinoma (RCC) cells (as well as A498 and ACHN) with luteolin caused cell apoptosis and death. This cytotoxicity was caused by the downregulation of Akt and resultant upregulation of apoptosis signal-regulating kinase-1 (Ask1), p38, and c-Jun N-terminal kinase (JNK) activities, probably via protein phosphatase 2A (PP2A) activation. In addition to being a concurrent substrate of caspases and event of cell death, heat shock protein-90 (HSP90) cleavage might also play a role in driving further cellular alterations and cell death, at least in part, involving an Akt-related mechanism. Due to the high expression of HSP90 and Akt-related molecules in RCC and other cancer cells, our findings suggest that PP2A activation might work in concert with HSP90 cleavage to inactivate Akt and lead to a vicious caspase-dependent apoptotic cycle in luteolin-treated 786-O cells.
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Cagle PT, Allen TC. Lung cancer genotype-based therapy and predictive biomarkers: present and future. Arch Pathol Lab Med 2013. [PMID: 23194040 DOI: 10.5858/arpa.2012-0508-ra] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
CONTEXT The advent of genotype-based therapy and predictive biomarkers for lung cancer has thrust the pathologist into the front lines of precision medicine for this deadly disease. OBJECTIVE To provide the clinical background, current status, and future perspectives of molecular targeted therapy for lung cancer patients, including the pivotal participation of the pathologist. DATA SOURCES Data were obtained from review of the pertinent peer-reviewed literature. CONCLUSIONS First-generation tyrosine kinase inhibitors have produced clinical response in a limited number of non-small cell lung cancers demonstrated to have activating mutations of epidermal growth factor receptor or anaplastic lymphoma kinase rearrangements with fusion partners. Patients treated with first-generation tyrosine kinase inhibitors develop acquired resistance to their therapy. Ongoing investigations of second-generation tyrosine kinase inhibitors and new druggable targets as well as the development of next-generation genotyping and new antibodies for immunohistochemistry promise to significantly expand the pathologist's already crucial role in precision medicine of lung cancer.
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Affiliation(s)
- Philip T Cagle
- Department of Pathology & Genomic Medicine, The Methodist Hospital, Houston, Texas, USA.
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Preclinical strategies targeted at non-small-cell lung cancer signalling pathways with striking translational fallout. Drug Discov Today 2013; 18:11-24. [DOI: 10.1016/j.drudis.2012.07.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 06/22/2012] [Accepted: 07/18/2012] [Indexed: 12/11/2022]
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New Advances in the Precision Medicine of Lung Cancer. CURRENT PATHOBIOLOGY REPORTS 2012. [DOI: 10.1007/s40139-012-0007-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Development of PI3K/AKT/mTOR pathway inhibitors and their application in personalized therapy for non-small-cell lung cancer. J Thorac Oncol 2012; 7:1315-26. [PMID: 22648207 DOI: 10.1097/jto.0b013e31825493eb] [Citation(s) in RCA: 154] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Lung cancer is a common disease with more than 1.6 million new cases diagnosed worldwide in 2008. Treatments for patients with advanced disease are rarely curative, and responses to therapy are often followed by relapse, which highlights the large unmet need for novel therapies. Recent advances in cancer treatment have focused on personalized therapy, whereby patients are treated with agents that best target the molecular drivers of their disease. Thus, a better understanding of the pathways that drive cancer or drug resistance is of critical importance. One such example is the phosphatidylinositol 3-kinase (PI3K)/AKT/mammalian target of rapamycin (mTOR) pathway, which is activated in many lung cancer patients and represents a target for therapy. PI3K/AKT/mTOR pathway activation has also been observed in tumors resistant to agents targeting upstream receptor tyrosine kinases. Agents that target this pathway have the potential to shut down survival pathways, and are being explored both in the setting of pathway-activating mutations and for their ability to restore sensitivity to upstream signaling targeted agents. Here, we examine the frequency of mutations activating the PI3K/AKT/mTOR pathway, review the novel agents being explored to target this pathway, and explore the potential role of the inhibition of this pathway in the clinical development of these agents.
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Pal I, Mandal M. PI3K and Akt as molecular targets for cancer therapy: current clinical outcomes. Acta Pharmacol Sin 2012; 33:1441-58. [PMID: 22983389 DOI: 10.1038/aps.2012.72] [Citation(s) in RCA: 129] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The PI3K-Akt pathway is a vital regulator of cell proliferation and survival. Alterations in the PIK3CA gene that lead to enhanced PI3K kinase activity have been reported in many human cancer types, including cancers of the colon, breast, brain, liver, stomach and lung. Deregulation of PI3K causes aberrant Akt activity. Therefore targeting this pathway could have implications for cancer treatment. The first generation PI3K-Akt inhibitors were proven to be highly effective with a low IC(50), but later, they were shown to have toxic side effects and poor pharmacological properties and selectivity. Thus, these inhibitors were only effective in preclinical models. However, derivatives of these first generation inhibitors are much more selective and are quite effective in targeting the PI3K-Akt pathway, either alone or in combination. These second-generation inhibitors are essentially a specific chemical moiety that helps to form a strong hydrogen bond interaction with the PI3K/Akt molecule. The goal of this review is to delineate the current efforts that have been undertaken to inhibit the various components of the PI3K and Akt pathway in different types of cancer both in vitro and in vivo. Our focus here is on these novel therapies and their inhibitory effects that depend upon their chemical nature, as well as their development towards clinical trials.
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