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Cunningham A, Brown M, Dresselhuis J, Robinson N, Hervie K, Cox ME, Mills J. Combination Effects of Integrin-linked Kinase and Abelson Kinase Inhibition on Aberrant Mitosis and Cell Death in Glioblastoma Cells. BIOLOGY 2023; 12:906. [PMID: 37508338 PMCID: PMC10376030 DOI: 10.3390/biology12070906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 05/21/2023] [Accepted: 06/21/2023] [Indexed: 07/30/2023]
Abstract
In cancer cells, inhibition of integrin-linked kinase (ILK) increases centrosome declustering causing mitotic arrest and cell death. Yet, not all cancer cells are susceptible to anti-ILK treatment alone. We investigate a combination drug strategy targeting ILK and another oncogenic kinase, Abelson kinase (ABL). Drug-concentration viability assays (i.e., MTT assays) indicate that ILK and ABL inhibitors in combination decreased the viability of glioblastoma cells over the ILK drug QLT-0267 alone. Combination strategies also increased aberrant mitoses and cell death over QLT-0267 alone. This was evident from an increase in mitotic arrest, apoptosis and a sub-G1 peak following FAC analysis. In vitro, ILK and ABL localized to the centrosome and the putative ILK kinase domain was important for this localization. Increased levels of cytosolic ABL are associated with its transformative abilities. ILK inhibitor effects on survival correlated with its ability to decrease cytosolic ABL levels and inhibit ABL's localization to mitotic centrosomes in glioblastoma cells. ILK inhibitor effects on ABL's centrosomal localization were reversed by the proteasomal inhibitor MG132 (a drug that inhibits ABL degradation). These results indicate that ILK regulates ABL at mitotic centrosomes and that combination treatments targeting ILK and ABL are more effective then QLT-0267 alone at decreasing the survival of dividing glioblastoma cells.
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Affiliation(s)
- Abigail Cunningham
- Department of Biology, Trinity Western University, Langley, BC V2Y 1Y1, Canada
| | - Maddisen Brown
- Department of Biology, Trinity Western University, Langley, BC V2Y 1Y1, Canada
| | | | - Nicole Robinson
- Vancouver Prostate Center and Vancouver Coastal Health Research Institute, Vancouver, BC V6T 1Z3, Canada
| | - Keni Hervie
- Department of Biology, Trinity Western University, Langley, BC V2Y 1Y1, Canada
| | - Michael E Cox
- Vancouver Prostate Center and Vancouver Coastal Health Research Institute, Vancouver, BC V6T 1Z3, Canada
| | - Julia Mills
- Department of Biology, Trinity Western University, Langley, BC V2Y 1Y1, Canada
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2
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Biological Evaluation and In Vitro Characterization of ADME Profile of In-House Pyrazolo[3,4- d]pyrimidines as Dual Tyrosine Kinase Inhibitors Active against Glioblastoma Multiforme. Pharmaceutics 2023; 15:pharmaceutics15020453. [PMID: 36839775 PMCID: PMC9966370 DOI: 10.3390/pharmaceutics15020453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 01/19/2023] [Accepted: 01/27/2023] [Indexed: 01/31/2023] Open
Abstract
The therapeutic use of tyrosine kinase inhibitors (TKIs) represents one of the successful strategies for the treatment of glioblastoma (GBM). Pyrazolo[3,4-d]pyrimidines have already been reported as promising small molecules active as c-Src/Abl dual inhibitors. Herein, we present a series of pyrazolo[3,4-d]pyrimidine derivatives, selected from our in-house library, to identify a promising candidate active against GBM. The inhibitory activity against c-Src and Abl was investigated, and the antiproliferative profile against four GBM cell lines was studied. For the most active compounds endowed with antiproliferative efficacy in the low-micromolar range, the effects toward nontumoral, healthy cell lines (fibroblasts FIBRO 2-93 and keratinocytes HaCaT) was investigated. Lastly, the in silico and in vitro ADME properties of all compounds were also assessed. Among the tested compounds, the promising inhibitory activity against c-Src and Abl (Ki 3.14 µM and 0.44 µM, respectively), the irreversible, apoptotic-mediated death toward U-87, LN18, LN229, and DBTRG GBM cell lines (IC50 6.8 µM, 10.8 µM, 6.9 µM, and 8.5 µM, respectively), the significant reduction in GBM cell migration, the safe profile toward FIBRO 2-93 and HaCaT healthy cell lines (CC50 91.7 µM and 126.5 µM, respectively), the high metabolic stability, and the excellent passive permeability across gastrointestinal and blood-brain barriers led us to select compound 5 for further in vivo assays.
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3
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Luttman JH, Colemon A, Mayro B, Pendergast AM. Role of the ABL tyrosine kinases in the epithelial-mesenchymal transition and the metastatic cascade. Cell Commun Signal 2021; 19:59. [PMID: 34022881 PMCID: PMC8140471 DOI: 10.1186/s12964-021-00739-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 04/16/2021] [Indexed: 12/20/2022] Open
Abstract
The ABL kinases, ABL1 and ABL2, promote tumor progression and metastasis in various solid tumors. Recent reports have shown that ABL kinases have increased expression and/or activity in solid tumors and that ABL inactivation impairs metastasis. The therapeutic effects of ABL inactivation are due in part to ABL-dependent regulation of diverse cellular processes related to the epithelial to mesenchymal transition and subsequent steps in the metastatic cascade. ABL kinases target multiple signaling pathways required for promoting one or more steps in the metastatic cascade. These findings highlight the potential utility of specific ABL kinase inhibitors as a novel treatment paradigm for patients with advanced metastatic disease. Video abstract.
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Affiliation(s)
- Jillian Hattaway Luttman
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, 308 Research Drive, C-233A LSRC Bldg., P.O. Box 3813, Durham, NC 27710 USA
| | - Ashley Colemon
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, 308 Research Drive, C-233A LSRC Bldg., P.O. Box 3813, Durham, NC 27710 USA
| | - Benjamin Mayro
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, 308 Research Drive, C-233A LSRC Bldg., P.O. Box 3813, Durham, NC 27710 USA
| | - Ann Marie Pendergast
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, 308 Research Drive, C-233A LSRC Bldg., P.O. Box 3813, Durham, NC 27710 USA
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4
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C3G downregulation induces the acquisition of a mesenchymal phenotype that enhances aggressiveness of glioblastoma cells. Cell Death Dis 2021; 12:348. [PMID: 33824275 PMCID: PMC8024353 DOI: 10.1038/s41419-021-03631-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 03/11/2021] [Accepted: 03/15/2021] [Indexed: 12/21/2022]
Abstract
Glioblastoma (GBM) is the most aggressive tumor from the central nervous system (CNS). The current lack of efficient therapies makes essential to find new treatment strategies. C3G, a guanine nucleotide exchange factor for some Ras proteins, plays a dual role in cancer, but its function in GBM remains unknown. Database analyses revealed a reduced C3G mRNA expression in GBM patient samples. C3G protein levels were also decreased in a panel of human GBM cell lines as compared to astrocytes. Based on this, we characterized C3G function in GBM using in vitro and in vivo human GBM models. We report here that C3G downregulation promoted the acquisition of a more mesenchymal phenotype that enhanced the migratory and invasive capacity of GBM cells. This facilitates foci formation in anchorage-dependent and -independent growth assays and the generation of larger tumors in xenografts and chick chorioallantoic membrane (CAM) assays, but with a lower cell density, as proliferation was reduced. Mechanistically, C3G knock-down impairs EGFR signaling by reducing cell surface EGFR through recycling inhibition, while upregulating the activation of several other receptor tyrosine kinases (RTKs) that might promote invasion. In particular, FGF2, likely acting through FGFR1, promoted invasion of C3G-silenced GBM cells. Moreover, ERKs mediate this invasiveness, both in response to FGF2- and serum-induced chemoattraction. In conclusion, our data show the distinct dependency of GBM tumors on C3G for EGF/EGFR signaling versus other RTKs, suggesting that assessing C3G levels may discriminate GBM patient responders to different RTK inhibition protocols. Hence, patients with a low C3G expression might not respond to EGFR inhibitors.
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5
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C3G Is Upregulated in Hepatocarcinoma, Contributing to Tumor Growth and Progression and to HGF/MET Pathway Activation. Cancers (Basel) 2020; 12:cancers12082282. [PMID: 32823931 PMCID: PMC7463771 DOI: 10.3390/cancers12082282] [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: 07/28/2020] [Revised: 08/11/2020] [Accepted: 08/12/2020] [Indexed: 12/28/2022] Open
Abstract
The complexity of hepatocellular carcinoma (HCC) challenges the identification of disease-relevant signals. C3G, a guanine nucleotide exchange factor for Rap and other Ras proteins, plays a dual role in cancer acting as either a tumor suppressor or promoter depending on tumor type and stage. The potential relevance of C3G upregulation in HCC patients suggested by database analysis remains unknown. We have explored C3G function in HCC and the underlying mechanisms using public patient data and in vitro and in vivo human and mouse HCC models. We found that C3G is highly expressed in progenitor cells and neonatal hepatocytes, whilst being down-regulated in adult hepatocytes and re-expressed in human HCC patients, mouse HCC models and HCC cell lines. Moreover, high C3G mRNA levels correlate with tumor progression and a lower patient survival rate. C3G expression appears to be tightly modulated within the HCC program, influencing distinct cell biological properties. Hence, high C3G expression levels are necessary for cell tumorigenic properties, as illustrated by reduced colony formation in anchorage-dependent and -independent growth assays induced by permanent C3G silencing using shRNAs. Additionally, we demonstrate that C3G down-regulation interferes with primary HCC tumor formation in xenograft assays, increasing apoptosis and decreasing proliferation. In vitro assays also revealed that C3G down-regulation enhances the pro-migratory, invasive and metastatic properties of HCC cells through an epithelial-mesenchymal switch that favors the acquisition of a more mesenchymal phenotype. Consistently, a low C3G expression in HCC cells correlates with lung metastasis formation in mice. However, the subsequent restoration of C3G levels is associated with metastatic growth. Mechanistically, C3G down-regulation severely impairs HGF/MET signaling activation in HCC cells. Collectively, our results indicate that C3G is a key player in HCC. C3G promotes tumor growth and progression, and the modulation of its levels is essential to ensure distinct biological features of HCC cells throughout the oncogenic program. Furthermore, C3G requirement for HGF/MET signaling full activation provides mechanistic data on how it works, pointing out the relevance of assessing whether high C3G levels could identify HCC responders to MET inhibitors.
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Liu Y, Cao J, Zhu YN, Ma Y, Murtaza G, Li Y, Wang JH, Pu YS. C1222C Deletion in Exon 8 of ABL1 Is Involved in Carcinogenesis and Cell Cycle Control of Colorectal Cancer Through IRS1/PI3K/Akt Pathway. Front Oncol 2020; 10:1385. [PMID: 32850446 PMCID: PMC7433659 DOI: 10.3389/fonc.2020.01385] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 06/30/2020] [Indexed: 12/16/2022] Open
Abstract
Colorectal cancer (CRC) is one of the most commonly diagnosed cancers worldwide. ABL1 (c-Abl) is a non-receptor tyrosine kinase, whose role, and molecular mechanism in CRC remain largely unclear. The aim of this study was to elucidate the role of ABL1 to obtain information on colon cancer gene mutation. We analyzed the tissue samples obtained from patients with CRC, CRC cell lines, and the immunodeficient mice. The proliferation, cell cycle, and apoptosis of CRC cells were examined. IPA software was used to analyze the molecules involved in CRC after ABL1 RNA interference. We found ABL1 was highly expressed in CRC tissues and cells. This high expression was associated with the TNM stage of CRC patients. In exon 8 of the ABL1 gene, we identified a novel mutation of C1222C deletion, which was related to the CRC stage. Depletion of ABL1 resulted in the inhibition of proliferation and escalation of apoptosis in two CRC cell lines, SW480, and HCT-116. Our in vivo study also demonstrated that depletion of ABL1 reduced CRC tumor progression. The results of the ingenuity pathway analysis indicated that the expression of 732 genes was upregulated and that of 691 genes was downregulated in mice transplanted with ABL1-downregulated CRC cells, among which we confirmed that depletion of ABL1 inhibited TGF-β1 via IRS1/PI3K/AKT pathway in CRC progression. These findings demonstrated that ABL1 plays an important role and that it can be a potential molecular target for CRC therapy.
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Affiliation(s)
- Yi Liu
- Department of Oncology, Shaanxi Provincial People's Hospital, Xi'an, China
| | - Jian Cao
- Department of Pharmacy, Xijing Hospital, Air Force Military Medical University, Xi'an, China
| | - Ya-Ning Zhu
- Department of Pharmacy, Shaanxi Provincial People's Hospital, Xi'an, China
| | - Yu Ma
- Department of Pathology, Shaanxi Provincial People's Hospital, Xi'an, China
| | - Ghulam Murtaza
- Department of Pharmacy, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
| | - Yu Li
- Department of Oncology, Shaanxi Provincial People's Hospital, Xi'an, China
| | - Jian-Hua Wang
- The Second Department of General Surgery, Shaanxi Provincial People's Hospital, Xi'an, China
| | - Yan-Song Pu
- The Second Department of General Surgery, Shaanxi Provincial People's Hospital, Xi'an, China
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7
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Bouhaddou M, Yu LJ, Lunardi S, Stamatelos SK, Mack F, Gallo JM, Birtwistle MR, Walz AC. Predicting In Vivo Efficacy from In Vitro Data: Quantitative Systems Pharmacology Modeling for an Epigenetic Modifier Drug in Cancer. Clin Transl Sci 2020; 13:419-429. [PMID: 31729169 PMCID: PMC7070804 DOI: 10.1111/cts.12727] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 10/16/2019] [Indexed: 02/04/2023] Open
Abstract
Reliably predicting in vivo efficacy from in vitro data would facilitate drug development by reducing animal usage and guiding drug dosing in human clinical trials. However, such prediction remains challenging. Here, we built a quantitative pharmacokinetic/pharmacodynamic (PK/PD) mathematical model capable of predicting in vivo efficacy in animal xenograft models of tumor growth while trained almost exclusively on in vitro cell culture data sets. We studied a chemical inhibitor of LSD1 (ORY‐1001), a lysine‐specific histone demethylase enzyme with epigenetic function, and drug‐induced regulation of target engagement, biomarker levels, and tumor cell growth across multiple doses administered in a pulsed and continuous fashion. A PK model of unbound plasma drug concentration was linked to the in vitro PD model, which enabled the prediction of in vivo tumor growth dynamics across a range of drug doses and regimens. Remarkably, only a change in a single parameter—the one controlling intrinsic cell/tumor growth in the absence of drug—was needed to scale the PD model from the in vitro to in vivo setting. These findings create a framework for using in vitro data to predict in vivo drug efficacy with clear benefits to reducing animal usage while enabling the collection of dense time course and dose response data in a highly controlled in vitro environment.
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Affiliation(s)
- Mehdi Bouhaddou
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center, New York, New York, USA.,Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Cellular and Molecular Pharmacology, University of California, San Francisco, California, USA.,J. David Gladstone Institutes, San Francisco, California, USA
| | - Li J Yu
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center, New York, New York, USA
| | | | - Spyros K Stamatelos
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center, New York, New York, USA.,Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Fiona Mack
- Roche Pharma Research and Early Development, Oncology, Roche Innovation Center, New York, New York, USA
| | - James M Gallo
- Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Pharmaceutical Sciences, University at Buffalo, Buffalo, New York, USA
| | - Marc R Birtwistle
- Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA.,Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina, USA
| | - Antje-Christine Walz
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center, Basel, Switzerland
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8
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Tripathi R, Liu Z, Plattner R. EnABLing Tumor Growth and Progression: Recent progress in unraveling the functions of ABL kinases in solid tumor cells. ACTA ACUST UNITED AC 2018; 4:367-379. [PMID: 30746323 DOI: 10.1007/s40495-018-0149-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Purpose of Review The goal of this review is to summarize our current knowledge regarding how ABL family kinases are activated in solid tumors and impact on solid tumor development/progression, with a focus on recent advances in the field. Recent Findings Although ABL kinases are known drivers of human leukemia, emerging data also implicates the kinases in a large number of solid tumor types where they promote diverse processes such as proliferation, survival, cytoskeletal reorganization, cellular polarity, EMT (epithelial-mesenchymal-transition), metabolic reprogramming, migration, invasion and metastasis via unique signaling pathways. ABL1 and ABL2 appear to have overlapping but also unique roles in driving these processes. In some tumor types, the kinases may act to integrate pro- and anti-proliferative and -invasive signals, and also may serve as a switch during EMT/MET (mesenchymal-epithelial) transitions. Conclusions Most data indicate that targeting ABL kinases may be effective for reducing tumor growth and preventing metastasis; however, ABL kinases also may have a tumor suppressive role in some tumor types and in some cellular contexts. Understanding the functions of ABL kinases in solid tumors is critical for developing successful clinical trials aimed at targeting ABL kinases for the treatment of solid tumors.
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Affiliation(s)
- Rakshamani Tripathi
- Department of Pharmacology and Nutritional Sciences, University of Kentucky School of Medicine, Lexington, Kentucky 40536
| | - Zulong Liu
- Department of Pharmacology and Nutritional Sciences, University of Kentucky School of Medicine, Lexington, Kentucky 40536
| | - Rina Plattner
- Department of Pharmacology and Nutritional Sciences, University of Kentucky School of Medicine, Lexington, Kentucky 40536
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9
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Zeng Y, Wang X, Wang J, Yi R, Long H, Zhou M, Luo Q, Zhai Z, Song Y, Qi S. The Tumorgenicity of Glioblastoma Cell Line U87MG Decreased During Serial In Vitro Passage. Cell Mol Neurobiol 2018; 38:1245-1252. [PMID: 29948550 DOI: 10.1007/s10571-018-0592-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 05/17/2018] [Indexed: 02/08/2023]
Abstract
Established cancer cell lines are routinely used to study cancer. Several factors such as serial passage may affect the reproducibility of experiments with cancer cell lines, but few researches focused on these changes. In the present study, different morphology and decreased tumorigenicity were observed in late passage U87MG cells. In vitro experiments further revealed that late passage U87MG cells possessed lower invasion properties than early passage, whereas no significant differences of proliferation and migration were found between early and late passage U87MG cells. In particular, we confirmed that late passage U87MG cells exhibited more epithelial phenotype with decreased PI3K/Akt pathway and TGF-β pathway expressions at protein level. In summary, our results focused on the changes of U87MG cells during serial in vitro passage, suggested that passage-induced changes may lead to notable changes of biological characteristics and several molecular transitions in cancer cell lines, indicating the necessity to shorten experiment-span and accomplish experiments with the same or similar passage cancer cell strains.
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Affiliation(s)
- Yu Zeng
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, People's Republic of China
| | - Xizhao Wang
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, People's Republic of China
| | - Jizhou Wang
- Department of Neurosurgery, The Fifth Affiliated Hospital, Sun Yat-Sen University, Zhuhai, 519000, Guangdong, People's Republic of China
| | - Renhui Yi
- Gannan Medical University, Ganzhou, 341000, Jiangxi, People's Republic of China.,Department of Neurosurgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, 341000, Jiangxi, People's Republic of China
| | - Hao Long
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, People's Republic of China
| | - Mingfeng Zhou
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, People's Republic of China
| | - Qisheng Luo
- Department of Neurosurgery, Affiliated Hospital of Youjiang Medical College for Nationalities, Baise, 533000, Guangxi, People's Republic of China
| | - Zhihao Zhai
- Department of Neurosurgery, The Eighth Affiliated Hospital, Sun Yat-Sen University, Futian, Shenzhen, 518000, People's Republic of China
| | - Ye Song
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, People's Republic of China.
| | - Songtao Qi
- Department of Neurosurgery, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, Guangdong, People's Republic of China.
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Fan Y, Arechederra M, Richelme S, Daian F, Novello C, Calderaro J, Di Tommaso L, Morcrette G, Rebouissou S, Donadon M, Morenghi E, Zucman-Rossi J, Roncalli M, Dono R, Maina F. A phosphokinome-based screen uncovers new drug synergies for cancer driven by liver-specific gain of nononcogenic receptor tyrosine kinases. Hepatology 2017; 66:1644-1661. [PMID: 28586114 DOI: 10.1002/hep.29304] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 05/24/2017] [Accepted: 06/02/2017] [Indexed: 12/14/2022]
Abstract
UNLABELLED Genetic mutations leading to oncogenic variants of receptor tyrosine kinases (RTKs) are frequent events during tumorigenesis; however, the cellular vulnerability to nononcogenic RTK fluctuations has not been characterized. Here, we demonstrated genetically that in the liver subtle increases in wild-type Met RTK levels are sufficient for spontaneous tumors in mice (Alb-R26Met ), conceptually illustrating how the shift from physiological to pathological conditions results from slight perturbations in signaling dosage. By analyzing 96 different genes in a panel of tumor samples, we demonstrated that liver tumorigenesis modeled by Alb-R26Met mice corresponds to a subset of hepatocellular carcinoma (HCC) patients, thus establishing the clinical relevance of this HCC mouse model. We elucidated the regulatory networks underlying tumorigenesis by combining a phosphokinome screen with bioinformatics analysis. We then used the signaling diversity results obtained from Alb-R26Met HCC versus control livers to design an "educated guess" drug screen, which led to the identification of new, deleterious synthetic lethal interactions. In particular, we report synergistic effects of mitogen-activated protein kinase kinase, ribosomal S6 kinase, and cyclin-dependent kinase 1/2 in combination with Bcl-XL inhibition on a panel of liver cancer cells. Focusing on mitogen-activated protein kinase kinase and Bcl-XL targeting, we mechanistically demonstrated concomitant down-regulation of phosphorylated extracellular signal-regulated kinase and myeloid cell leukemia 1 levels. Of note, a phosphorylated extracellular signal-regulated kinase+/BCL-XL+ /myeloid cell leukemia 1+ signature, deregulated in Alb-R26Met tumors, characterizes a subgroup of HCC patients with poor prognosis. CONCLUSION Our genetic studies highlight the heightened vulnerability of liver cells to subtle changes in nononcogenic RTK levels, allowing them to acquire a molecular profile that facilitates the full tumorigenic program; furthermore, our outcomes uncover new synthetic lethal interactions as potential therapies for a cluster of HCC patients. (Hepatology 2017;66:1644-1661).
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Affiliation(s)
- Yannan Fan
- Aix Marseille Univ., CNRS, Institute of Developmental Biology of Marseille, Parc Scientifique de Luminy, Marseille, France
| | - Maria Arechederra
- Aix Marseille Univ., CNRS, Institute of Developmental Biology of Marseille, Parc Scientifique de Luminy, Marseille, France
| | - Sylvie Richelme
- Aix Marseille Univ., CNRS, Institute of Developmental Biology of Marseille, Parc Scientifique de Luminy, Marseille, France
| | - Fabrice Daian
- Aix Marseille Univ., CNRS, Institute of Developmental Biology of Marseille, Parc Scientifique de Luminy, Marseille, France
| | - Chiara Novello
- Pathology Unit, Humanitas Clinical and Research Center, and Department of Biomedical Sciences, Humanitas University, Rozzano, Milan, Italy
| | - Julien Calderaro
- Département de Pathologie, APHP, Groupe Hospitalier Henri Mondor.,INSERM U955, Team 18, Institut Mondor de Recherche Biomédicale, Créteil, France
| | - Luca Di Tommaso
- Pathology Unit, Humanitas Clinical and Research Center, and Department of Biomedical Sciences, Humanitas University, Rozzano, Milan, Italy
| | - Guillaume Morcrette
- Institut National de la Santé et de la Recherche Médicale (INSERM), UMR674, Génomique Fonctionnelle des Tumeurs Solides, Institut Universitaire d'Hematologie, Paris, France
| | - Sandra Rebouissou
- Institut National de la Santé et de la Recherche Médicale (INSERM), UMR674, Génomique Fonctionnelle des Tumeurs Solides, Institut Universitaire d'Hematologie, Paris, France
| | - Matteo Donadon
- Hepatobiliary and General Surgery, Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - Emanuela Morenghi
- Biostatistics Unit, Humanitas Clinical and Research Center, Rozzano, Milan, Italy
| | - Jessica Zucman-Rossi
- Institut National de la Santé et de la Recherche Médicale (INSERM), UMR674, Génomique Fonctionnelle des Tumeurs Solides, Institut Universitaire d'Hematologie, Paris, France
| | - Massimo Roncalli
- Pathology Unit, Humanitas Clinical and Research Center, and Department of Biomedical Sciences, Humanitas University, Rozzano, Milan, Italy
| | - Rosanna Dono
- Aix Marseille Univ., CNRS, Institute of Developmental Biology of Marseille, Parc Scientifique de Luminy, Marseille, France
| | - Flavio Maina
- Aix Marseille Univ., CNRS, Institute of Developmental Biology of Marseille, Parc Scientifique de Luminy, Marseille, France
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