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Obata Y, Kurokawa K, Tojima T, Natsume M, Shiina I, Takahashi T, Abe R, Nakano A, Nishida T. Golgi retention and oncogenic KIT signaling via PLCγ2-PKD2-PI4KIIIβ activation in gastrointestinal stromal tumor cells. Cell Rep 2023; 42:113035. [PMID: 37616163 DOI: 10.1016/j.celrep.2023.113035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 06/19/2023] [Accepted: 08/11/2023] [Indexed: 08/25/2023] Open
Abstract
Most gastrointestinal stromal tumors (GISTs) develop due to gain-of-function mutations in the tyrosine kinase gene, KIT. We recently showed that mutant KIT mislocalizes to the Golgi area and initiates uncontrolled signaling. However, the molecular mechanisms underlying its Golgi retention remain unknown. Here, we show that protein kinase D2 (PKD2) is activated by the mutant, which causes Golgi retention of KIT. In PKD2-inhibited cells, KIT migrates from the Golgi region to lysosomes and subsequently undergoes degradation. Importantly, delocalized KIT cannot trigger downstream activation. In the Golgi/trans-Golgi network (TGN), KIT activates the PKD2-phosphatidylinositol 4-kinase IIIβ (PKD2-PI4KIIIβ) pathway through phospholipase Cγ2 (PLCγ2) to generate a PI4P-rich membrane domain, where the AP1-GGA1 complex is aberrantly recruited. Disruption of any factors in this cascade results in the release of KIT from the Golgi/TGN. Our findings show the molecular mechanisms underlying KIT mislocalization and provide evidence for a strategy for inhibition of oncogenic signaling.
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Affiliation(s)
- Yuuki Obata
- Laboratory of Intracellular Traffic & Oncology, National Cancer Center Research Institute, Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
| | - Kazuo Kurokawa
- Live Cell Super-Resolution Imaging Research Team, RIKEN Center for Advanced Photonics, Wako, Saitama 351-0198, Japan
| | - Takuro Tojima
- Live Cell Super-Resolution Imaging Research Team, RIKEN Center for Advanced Photonics, Wako, Saitama 351-0198, Japan
| | - Miyuki Natsume
- Laboratory of Intracellular Traffic & Oncology, National Cancer Center Research Institute, Tsukiji, Chuo-ku, Tokyo 104-0045, Japan; Department of Applied Chemistry, Tokyo University of Science, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Isamu Shiina
- Department of Applied Chemistry, Tokyo University of Science, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Tsuyoshi Takahashi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Ryo Abe
- Tokyo University of Science, Noda, Chiba 278-8510, Japan
| | - Akihiko Nakano
- Live Cell Super-Resolution Imaging Research Team, RIKEN Center for Advanced Photonics, Wako, Saitama 351-0198, Japan
| | - Toshirou Nishida
- National Cancer Center Hospital, Tsukiji, Chuo-ku, Tokyo 104-0045, Japan; Laboratory of Nuclear Transport Dynamics, National Institutes of Biomedical Innovation, Health and Nutrition, Ibaraki, Osaka 567-0085, Japan
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Croucher DC, Devasia AJ, Abelman DD, Mahdipour-Shirayeh A, Li Z, Erdmann N, Tiedemann R, Pugh TJ, Trudel S. Single-cell profiling of multiple myeloma reveals molecular response to FGFR3 inhibitor despite clinical progression. Cold Spring Harb Mol Case Stud 2023; 9:a006249. [PMID: 36639200 PMCID: PMC10240837 DOI: 10.1101/mcs.a006249] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 11/29/2022] [Indexed: 01/15/2023] Open
Abstract
Genomic characterization of cancer has enabled identification of numerous molecular targets, which has led to significant advances in personalized medicine. However, with few exceptions, precision medicine approaches in the plasma cell malignancy multiple myeloma (MM) have had limited success, likely owing to the subclonal nature of molecular targets in this disease. Targeted therapies against FGFR3 have been under development for the past decade in the hopes of targeting aberrant FGFR3 activity in MM. FGFR3 activation results from the recurrent transforming event of t(4;14) found in ∼15% of MM patients, as well as secondary FGFR3 mutations in this subgroup. To evaluate the effectiveness of targeting FGFR3 in MM, we undertook a phase 2 clinical trial evaluating the small-molecule FGFR1-4 inhibitor, erdafitinib, in relapsed/refractory myeloma patients with or without FGFR3 mutations (NCT02952573). Herein, we report on a single t(4;14) patient enrolled on this study who was identified to have a subclonal FGFR3 stop-loss deletion. Although this individual eventually progressed on study and succumbed to their disease, the intended molecular response was revealed through an extensive molecular characterization of the patient's tumor at baseline and on treatment using single-cell genomics. We identified elimination of the FGFR3-mutant subclone after treatment and expansion of a preexisting clone with loss of Chromosome 17p. Altogether, our study highlights the utility of single-cell genomics in targeted trials as they can reveal molecular mechanisms that underlie sensitivity and resistance. This in turn can guide more personalized and targeted therapeutic approaches, including those that involve FGFR3-targeting therapies.
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Affiliation(s)
- Danielle C Croucher
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario M5G 2C1, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5S 1A1, Canada
| | - Anup Joseph Devasia
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario M5G 2C1, Canada
| | - Dor D Abelman
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario M5G 2C1, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5S 1A1, Canada
| | - Ali Mahdipour-Shirayeh
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario M5G 2C1, Canada
| | - Zhihua Li
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario M5G 2C1, Canada
| | - Natalie Erdmann
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario M5G 2C1, Canada
| | - Rodger Tiedemann
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario M5G 2C1, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5S 1A1, Canada
| | - Trevor J Pugh
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario M5G 2C1, Canada;
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5S 1A1, Canada
- Ontario Institute for Cancer Research, Toronto, Ontario M5G 0A3, Canada
| | - Suzanne Trudel
- Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario M5G 2C1, Canada;
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5S 1A1, Canada
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3
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Andreozzi F, Dragani M, Quivoron C, Le Bras F, Assi T, Danu A, Belhadj K, Lazarovici J, Cotteret S, Bernard OA, Ribrag V, Michot JM. Precision Medicine Approach Based on Molecular Alterations for Patients with Relapsed or Refractory Multiple Myeloma: Results from the MM-EP1 Study. Cancers (Basel) 2023; 15:cancers15051508. [PMID: 36900299 PMCID: PMC10001403 DOI: 10.3390/cancers15051508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 02/18/2023] [Accepted: 02/23/2023] [Indexed: 03/08/2023] Open
Abstract
BACKGROUND Despite that cytogenetic and molecular analysis of tumor cells can rapidly identify recurring molecular abnormalities, no personalized therapy is currently available in the setting of relapsed/refractory multiple myeloma (r/r MM). METHODS MM-EP1 is a retrospective study aimed at comparing a personalized molecular-oriented (MO) versus a non-molecular-oriented (no-MO) approach in r/r MM. Actionable molecular targets and their associated therapies were the BRAF V600E mutation and BRAF inhibitors; t(11;14)(q13;q32) and BCL2 inhibitors; and t(4;14)(p16;q32) with FGFR3 fusion/rearrangements and FGFR3 inhibitors. RESULTS One hundred three highly pretreated r/r MM patients with a median age of 67 years (range 44-85) were included. Seventeen (17%) patients were treated using an MO approach with BRAF inhibitors (vemurafenib or dabrafenib, n = 6), BCL2 inhibitor (venetoclax, n = 9), or FGFR3 inhibitor (erdafitinib, n = 2). Eighty-six (86%) patients received non-MO therapies. Overall response rate was 65% in MO patients versus 58% in the non-MO group (p = 0.053). Median PFS and OS were 9 and 6 months (HR = 0.96; CI95 = 0.51-1.78; p = 0.88) and 26 and 28 months (HR = 0.98; CI95 = 0.46-2.12; p = 0.98), respectively, in MO and no-MO patients. CONCLUSION Despite the low number of patients treated with an MO approach, this study highlights the strengths and weakness of a molecular-targeted approach for the treatment of multiple myeloma. Widespread biomolecular techniques and improvement of precision medicine treatment algorithms could improve selection for precision medicine in myeloma.
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Affiliation(s)
- Fabio Andreozzi
- Département d’Innovation Thérapeutique et d’Essais Précoces, Gustave Roussy, 94805 Villejuif, France
- Hematology Department, Institute Jules Bordet, 1070 Bruxelles, Belgium
- Correspondence:
| | - Matteo Dragani
- Hematology Department, Gustave Roussy, 94805 Villejuif, France
| | - Cyril Quivoron
- Translational Research Hematological Laboratory, Gustave Roussy, 94805 Villejuif, France
- INSERM U1170, Université Paris-Saclay, Gustave Roussy, 94805 Villejuif, France
| | - Fabien Le Bras
- Hematology Department, Assistance Publique Hôpitaux de Paris, Hôpital Henri Mondor, 94000 Créteil, France
| | - Tarek Assi
- Hematology Department, Gustave Roussy, 94805 Villejuif, France
| | - Alina Danu
- Hematology Department, Gustave Roussy, 94805 Villejuif, France
| | - Karim Belhadj
- Hematology Department, Assistance Publique Hôpitaux de Paris, Hôpital Henri Mondor, 94000 Créteil, France
| | | | - Sophie Cotteret
- Department of Medical Biology and Pathology, Gustave Roussy, 94805 Villejuif, France
| | - Olivier A. Bernard
- INSERM U1170, Université Paris-Saclay, Gustave Roussy, 94805 Villejuif, France
| | - Vincent Ribrag
- Département d’Innovation Thérapeutique et d’Essais Précoces, Gustave Roussy, 94805 Villejuif, France
- Hematology Department, Gustave Roussy, 94805 Villejuif, France
- Translational Research Hematological Laboratory, Gustave Roussy, 94805 Villejuif, France
- INSERM U1170, Université Paris-Saclay, Gustave Roussy, 94805 Villejuif, France
| | - Jean-Marie Michot
- Département d’Innovation Thérapeutique et d’Essais Précoces, Gustave Roussy, 94805 Villejuif, France
- Hematology Department, Gustave Roussy, 94805 Villejuif, France
- INSERM U1170, Université Paris-Saclay, Gustave Roussy, 94805 Villejuif, France
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Novel potential oncogenic and druggable mutations of FGFRs recur in the kinase domain across cancer types. Biochim Biophys Acta Mol Basis Dis 2022; 1868:166313. [PMID: 34826586 DOI: 10.1016/j.bbadis.2021.166313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 11/16/2021] [Accepted: 11/18/2021] [Indexed: 12/19/2022]
Abstract
Fibroblast growth factor receptors (FGFRs) are recurrently altered by single nucleotide variants (SNVs) in many human cancers. The prevalence of SNVs in FGFRs depends on the cancer type. In some tumors, such as the urothelial carcinoma, mutations of FGFRs occur at very high frequency (up to 60%). Many characterized mutations occur in the extracellular or transmembrane domains, while fewer known mutations are found in the kinase domain. In this study, we performed a bioinformatics analysis to identify novel putative cancer driver or therapeutically actionable mutations of the kinase domain of FGFRs. To pinpoint those mutations that may be clinically relevant, we exploited the recurrence of alterations on analogous amino acid residues within the kinase domain (PK_Tyr_Ser-Thr) of different kinases as a predictor of functional impact. By exploiting MutationAligner and LowMACA bioinformatics resources, we highlighted novel uncharacterized mutations of FGFRs which recur in other protein kinases. By revealing unanticipated correspondence with known variants, we were able to infer their functional effects, as alterations clustering on similar residues in analogous proteins have a high probability to elicit similar effects. As FGFRs represent an important class of oncogenes and drug targets, our study opens the way for further studies to validate their driver and/or actionable nature and, in the long term, for a more efficacious application of precision oncology.
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5
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Pan D, Richter J. Where We Stand With Precision Therapeutics in Myeloma: Prosperity, Promises, and Pipedreams. Front Oncol 2022; 11:819127. [PMID: 35127532 PMCID: PMC8811139 DOI: 10.3389/fonc.2021.819127] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Accepted: 12/27/2021] [Indexed: 11/13/2022] Open
Abstract
Multiple myeloma remains an incurable disease despite numerous novel agents being approved in the last decade. Furthermore, disease behavior and susceptibility to current treatments often vary drastically from patient to patient. To date there are no approved therapies in myeloma that are targeted to specific patient populations based on genomic or immunologic findings. Precision medicine, using biomarkers descriptive of a specific tumor’s biology and predictive of response to appropriate agents, may continue to push the field forward by expanding our treatment arsenal while refining our ability to expose patients to only those treatments likely to be efficacious. Extensive research efforts have been carried out in this endeavor including the use of agents targeting Bcl2 and the RAS/MAPK and PI3K/AKT/mTOR pathways. Thus far, clinical trials have yielded occasional successes intermixed with disappointments, reflecting significant hurdles which still remain including the complex crosstalk between oncogenic pathways and the nonlinear genetic development of myeloma, prone to cultivating sub-clones with distinctive mutations. In this review, we explore the landscape of precision therapeutics in multiple myeloma and underscore the degree to which research efforts have produced tangible clinical results.
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Aksenova AY, Zhuk AS, Lada AG, Zotova IV, Stepchenkova EI, Kostroma II, Gritsaev SV, Pavlov YI. Genome Instability in Multiple Myeloma: Facts and Factors. Cancers (Basel) 2021; 13:5949. [PMID: 34885058 PMCID: PMC8656811 DOI: 10.3390/cancers13235949] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/20/2021] [Accepted: 11/22/2021] [Indexed: 02/06/2023] Open
Abstract
Multiple myeloma (MM) is a malignant neoplasm of terminally differentiated immunoglobulin-producing B lymphocytes called plasma cells. MM is the second most common hematologic malignancy, and it poses a heavy economic and social burden because it remains incurable and confers a profound disability to patients. Despite current progress in MM treatment, the disease invariably recurs, even after the transplantation of autologous hematopoietic stem cells (ASCT). Biological processes leading to a pathological myeloma clone and the mechanisms of further evolution of the disease are far from complete understanding. Genetically, MM is a complex disease that demonstrates a high level of heterogeneity. Myeloma genomes carry numerous genetic changes, including structural genome variations and chromosomal gains and losses, and these changes occur in combinations with point mutations affecting various cellular pathways, including genome maintenance. MM genome instability in its extreme is manifested in mutation kataegis and complex genomic rearrangements: chromothripsis, templated insertions, and chromoplexy. Chemotherapeutic agents used to treat MM add another level of complexity because many of them exacerbate genome instability. Genome abnormalities are driver events and deciphering their mechanisms will help understand the causes of MM and play a pivotal role in developing new therapies.
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Affiliation(s)
- Anna Y. Aksenova
- Laboratory of Amyloid Biology, St. Petersburg State University, 199034 St. Petersburg, Russia
| | - Anna S. Zhuk
- International Laboratory “Computer Technologies”, ITMO University, 197101 St. Petersburg, Russia;
| | - Artem G. Lada
- Department of Microbiology and Molecular Genetics, University of California, Davis, CA 95616, USA;
| | - Irina V. Zotova
- Department of Genetics and Biotechnology, St. Petersburg State University, 199034 St. Petersburg, Russia; (I.V.Z.); (E.I.S.)
- Vavilov Institute of General Genetics, St. Petersburg Branch, Russian Academy of Sciences, 199034 St. Petersburg, Russia
| | - Elena I. Stepchenkova
- Department of Genetics and Biotechnology, St. Petersburg State University, 199034 St. Petersburg, Russia; (I.V.Z.); (E.I.S.)
- Vavilov Institute of General Genetics, St. Petersburg Branch, Russian Academy of Sciences, 199034 St. Petersburg, Russia
| | - Ivan I. Kostroma
- Russian Research Institute of Hematology and Transfusiology, 191024 St. Petersburg, Russia; (I.I.K.); (S.V.G.)
| | - Sergey V. Gritsaev
- Russian Research Institute of Hematology and Transfusiology, 191024 St. Petersburg, Russia; (I.I.K.); (S.V.G.)
| | - Youri I. Pavlov
- Eppley Institute for Research in Cancer, Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Departments of Biochemistry and Molecular Biology, Microbiology and Pathology, Genetics Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE 68198, USA
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FLT3-ITD transduces autonomous growth signals during its biosynthetic trafficking in acute myelogenous leukemia cells. Sci Rep 2021; 11:22678. [PMID: 34811450 PMCID: PMC8608843 DOI: 10.1038/s41598-021-02221-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 11/11/2021] [Indexed: 12/11/2022] Open
Abstract
FMS-like tyrosine kinase 3 (FLT3) in hematopoietic cells binds to its ligand at the plasma membrane (PM), then transduces growth signals. FLT3 gene alterations that lead the kinase to assume its permanently active form, such as internal tandem duplication (ITD) and D835Y substitution, are found in 30–40% of acute myelogenous leukemia (AML) patients. Thus, drugs for molecular targeting of FLT3 mutants have been developed for the treatment of AML. Several groups have reported that compared with wild-type FLT3 (FLT3-wt), FLT3 mutants are retained in organelles, resulting in low levels of PM localization of the receptor. However, the precise subcellular localization of mutant FLT3 remains unclear, and the relationship between oncogenic signaling and the mislocalization is not completely understood. In this study, we show that in cell lines established from leukemia patients, endogenous FLT3-ITD but not FLT3-wt clearly accumulates in the perinuclear region. Our co-immunofluorescence assays demonstrate that Golgi markers are co-localized with the perinuclear region, indicating that FLT3-ITD mainly localizes to the Golgi region in AML cells. FLT3-ITD biosynthetically traffics to the Golgi apparatus and remains there in a manner dependent on its tyrosine kinase activity. Tyrosine kinase inhibitors, such as quizartinib (AC220) and midostaurin (PKC412), markedly decrease FLT3-ITD retention and increase PM levels of the mutant. FLT3-ITD activates downstream in the endoplasmic reticulum (ER) and the Golgi apparatus during its biosynthetic trafficking. Results of our trafficking inhibitor treatment assays show that FLT3-ITD in the ER activates STAT5, whereas that in the Golgi can cause the activation of AKT and ERK. We provide evidence that FLT3-ITD signals from the early secretory compartments before reaching the PM in AML cells.
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8
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Jing W, Wang G, Cui Z, Xiong G, Jiang X, Li Y, Li W, Han B, Chen S, Shi B. FGFR3 Destabilizes PD-L1 Via NEDD4 to Control T Cell-Mediated Bladder Cancer Immune Surveillance. Cancer Res 2021; 82:114-129. [PMID: 34753771 DOI: 10.1158/0008-5472.can-21-2362] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 09/22/2021] [Accepted: 11/05/2021] [Indexed: 11/16/2022]
Abstract
Fibroblast growth factor receptor 3 (FGFR3) is frequently activated by mutation or overexpression, and it is a validated therapeutic target in urothelial carcinoma (UC) of the bladder. However, the role and detailed molecular mechanism of FGFR3 in the immune microenvironment of bladder cancer remain largely unknown. Here, we demonstrate that inhibition of FGFR3 in FGFR3-activated bladder cancer elevates PD-L1 protein levels by affecting its ubiquitination, thereby inhibiting the anti-tumor activity of CD8+ T cells. Tissue microarray analysis in human UC showed an inverse correlation between FGFR3 and PD-L1. Furthermore, NEDD4, an E3 ubiquitin ligase of the NEDD4 family of proteins, was phosphorylated by FGFR3 activation and served as a regulator of PD-L1 ubiquitination. Mechanistically, NEDD4 interacted with PD-L1 and catalyzed Lys48 (K48)-linked polyubiquitination of PD-L1. In mice bearing NEDD4 knockout bladder cancer, CD8+ T cell infiltration and antitumor activity were significantly inhibited due to PD-L1 upregulation in bladder cancer cells. Furthermore, multiple FGFR3-activated tumor-bearing mouse models suggested that attenuated CD8+ T cell-mediated antitumor efficacy following FGFR3-targeted therapy could be rescued by a combination with anti-PD-1 immunotherapy, which leads to effective tumor suppression. This study establishes a key molecular link between targeted therapy and immune surveillance and identifies NEDD4 as a crucial E3 ubiquitin ligase that targets PD-L1 for degradation in FGFR3-activated bladder cancer. These findings may potentially be exploited for combination therapies in UC of the bladder and possibly other malignancies with activated FGFR3.
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Affiliation(s)
- Weiqiang Jing
- Department of Urology, Qilu Hospital of Shandong University
| | - Ganyu Wang
- Department of Pediatric Surgery, Qilu Hospital of Shandong University
| | | | | | | | | | - Wushan Li
- Jinan Maternity and Child Care Hospital Affiliated to Shandong First Medical University
| | | | - Shouzhen Chen
- Department of Urology, Qilu Hospital of Shandong University
| | - Benkang Shi
- Department of Urology, Qilu Hospital of Shandong University
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9
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Metabolic Effects of Recurrent Genetic Aberrations in Multiple Myeloma. Cancers (Basel) 2021; 13:cancers13030396. [PMID: 33494394 PMCID: PMC7865460 DOI: 10.3390/cancers13030396] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/15/2021] [Accepted: 01/18/2021] [Indexed: 12/17/2022] Open
Abstract
Oncogene activation and malignant transformation exerts energetic, biosynthetic and redox demands on cancer cells due to increased proliferation, cell growth and tumor microenvironment adaptation. As such, altered metabolism is a hallmark of cancer, which is characterized by the reprogramming of multiple metabolic pathways. Multiple myeloma (MM) is a genetically heterogeneous disease that arises from terminally differentiated B cells. MM is characterized by reciprocal chromosomal translocations that often involve the immunoglobulin loci and a restricted set of partner loci, and complex chromosomal rearrangements that are associated with disease progression. Recurrent chromosomal aberrations in MM result in the aberrant expression of MYC, cyclin D1, FGFR3/MMSET and MAF/MAFB. In recent years, the intricate mechanisms that drive cancer cell metabolism and the many metabolic functions of the aforementioned MM-associated oncogenes have been investigated. Here, we discuss the metabolic consequences of recurrent chromosomal translocations in MM and provide a framework for the identification of metabolic changes that characterize MM cells.
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10
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Adham AN, Abdelfatah S, Naqishbandi AM, Mahmoud N, Efferth T. Cytotoxicity of apigenin toward multiple myeloma cell lines and suppression of iNOS and COX-2 expression in STAT1-transfected HEK293 cells. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2021; 80:153371. [PMID: 33070080 DOI: 10.1016/j.phymed.2020.153371] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 10/04/2020] [Accepted: 10/07/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Apigenin is one of the most abundant dietary flavonoids that possesses multiple bio-functions. PURPOSE This study was designed to determine the influence of apigenin on gene expressions, cancer cells, as well as STAT1/COX-2/iNOS pathway mediated inflammation and tumorigenesis in HEK293-STAT1 cells. Furthermore, the cytotoxic activity toward multiple myeloma (MM) cell lines was investigated. METHODS Bioinformatic analyses were used to predict the sensitivity and resistance of tumor cells toward apigenin and to determine cellular pathways influenced by this compound. The cytotoxic and ferroptotic activity of apigenin was examined by the resazurin reduction assay. Additionally, we evaluated apoptosis, and cell cycle distribution, induction of reactive oxygen species (ROS) and loss of integrity of mitochondrial membrane (MMP) by using the flow cytometry analysis. DAPI staining was used to detect characteristic apoptotic features. Furthermore, we verified its anti-inflammatory and additional mechanism of cell death by western blotting. RESULTS COMPARE and hierarchical cluster analyses exhibited that 29 of 55 tumor cell lines were sensitive against apigenin (p < 0.001). The Ingenuity Pathway Analysis data showed that important bio-functions affected by apigenin were: gene expression, cancer, hematological system development and function, inflammatory response, and cell cycle. The STAT1 transcription factor was chosen as target protein on the basis of gene promoter binding motif analyses. Apigenin blocked cell proliferation of wild-type HEK293 and STAT1 reporter cells (HEK293-STAT1), promoted STAT1 suppression and subsequent COX-2 and iNOS inhibition. Apigenin also exhibited synergistic activity in combination with doxorubicin toward HEK293-STAT1 cells. Apigenin exerted excellent growth-inhibitory activity against MM cells in a concentration-dependent manner with the greatest activity toward NCI-H929 (IC50 value: 10.73 ± 3.21 μM). Apigenin induced apoptosis, cell cycle arrest, ferroptosis and autophagy in NCI-H929 cells. CONCLUSION Apigenin may be a suitable candidate for MM treatment. The inhibition of the STAT1/COX-2/iNOS signaling pathway by apigenin is an important mechanism not only in the suppression of inflammation but also in induction of apoptosis.
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Affiliation(s)
- Aveen N Adham
- Department of Pharmacognosy, College of Pharmacy, Hawler Medical University, Erbil, Kurdistan Region, Iraq; Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany
| | - Sara Abdelfatah
- Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany
| | - Alaadin M Naqishbandi
- Department of Pharmacognosy, College of Pharmacy, Hawler Medical University, Erbil, Kurdistan Region, Iraq.
| | - Nuha Mahmoud
- Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany
| | - Thomas Efferth
- Department of Pharmaceutical Biology, Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany.
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11
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Oberlick EM, Rees MG, Seashore-Ludlow B, Vazquez F, Nelson GM, Dharia NV, Weir BA, Tsherniak A, Ghandi M, Krill-Burger JM, Meyers RM, Wang X, Montgomery P, Root DE, Bieber JM, Radko S, Cheah JH, Hon CSY, Shamji AF, Clemons PA, Park PJ, Dyer MA, Golub TR, Stegmaier K, Hahn WC, Stewart EA, Schreiber SL, Roberts CWM. Small-Molecule and CRISPR Screening Converge to Reveal Receptor Tyrosine Kinase Dependencies in Pediatric Rhabdoid Tumors. Cell Rep 2020; 28:2331-2344.e8. [PMID: 31461650 DOI: 10.1016/j.celrep.2019.07.021] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 04/19/2019] [Accepted: 07/08/2019] [Indexed: 02/09/2023] Open
Abstract
Cancer is often seen as a disease of mutations and chromosomal abnormalities. However, some cancers, including pediatric rhabdoid tumors (RTs), lack recurrent alterations targetable by current drugs and need alternative, informed therapeutic options. To nominate potential targets, we performed a high-throughput small-molecule screen complemented by a genome-scale CRISPR-Cas9 gene-knockout screen in a large number of RT and control cell lines. These approaches converged to reveal several receptor tyrosine kinases (RTKs) as therapeutic targets, with RTK inhibition effective in suppressing RT cell growth in vitro and against a xenograft model in vivo. RT cell lines highly express and activate (phosphorylate) different RTKs, creating dependency without mutation or amplification. Downstream of RTK signaling, we identified PTPN11, encoding the pro-growth signaling protein SHP2, as a shared dependency across all RT cell lines. This study demonstrates that large-scale perturbational screening can uncover vulnerabilities in cancers with "quiet" genomes.
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Affiliation(s)
- Elaine M Oberlick
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Biological and Biomedical Sciences Program, Harvard Medical School, Boston, MA 02115, USA; Broad Institute, Cambridge, MA 02142, USA
| | | | - Brinton Seashore-Ludlow
- Broad Institute, Cambridge, MA 02142, USA; Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institute, 171 77 Stockholm, Sweden
| | | | - Geoffrey M Nelson
- Department of Biomedical Informatics, Harvard Medical School, Boston, MA 02115, USA
| | - Neekesh V Dharia
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Broad Institute, Cambridge, MA 02142, USA; Department of Pediatrics, Harvard Medical School, Boston, MA 02215, USA; Boston Children's Hospital, Boston, MA 02115, USA
| | | | | | | | | | | | - Xiaofeng Wang
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | | | | | | | - Sandi Radko
- Comprehensive Cancer Center and Department of Oncology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | | | | | | | | | - Peter J Park
- Department of Biomedical Informatics, Harvard Medical School, Boston, MA 02115, USA; Harvard Ludwig Center, Harvard Medical School, Boston, MA 02115, USA
| | - Michael A Dyer
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Todd R Golub
- Broad Institute, Cambridge, MA 02142, USA; Department of Pediatrics, Harvard Medical School, Boston, MA 02215, USA; Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Kimberly Stegmaier
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Broad Institute, Cambridge, MA 02142, USA; Boston Children's Hospital, Boston, MA 02115, USA
| | - William C Hahn
- Broad Institute, Cambridge, MA 02142, USA; Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Elizabeth A Stewart
- Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Stuart L Schreiber
- Broad Institute, Cambridge, MA 02142, USA; Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA
| | - Charles W M Roberts
- Comprehensive Cancer Center and Department of Oncology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
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12
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Receptor tyrosine kinases and heparan sulfate proteoglycans: Interplay providing anticancer targeting strategies and new therapeutic opportunities. Biochem Pharmacol 2020; 178:114084. [DOI: 10.1016/j.bcp.2020.114084] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/04/2020] [Accepted: 06/04/2020] [Indexed: 12/13/2022]
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13
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Kinahan C, Mangone MA, Scotto L, Visentin M, Marchi E, Cho HJ, O'Connor OA. The anti-tumor activity of pralatrexate (PDX) correlates with the expression of RFC and DHFR mRNA in preclinical models of multiple myeloma. Oncotarget 2020; 11:1576-1589. [PMID: 32405334 PMCID: PMC7210016 DOI: 10.18632/oncotarget.27516] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 02/17/2020] [Indexed: 12/13/2022] Open
Abstract
Multiple myeloma (MM) is the second most common hematologic malignancy. While major advances have been made in the disease, it is still incurable. Although antifolate-based drugs are not commonly used to treat myeloma, new generation analogs with distinct patterns of preclinical and clinical activity may offer an opportunity to identify new classes of potentially active drugs. Pralatrexate (PDX), which was approved for the treatment of relapsed or refractory peripheral T-cell lymphoma in 2009, may be one such drug. Pralatrexate exhibits a potency and pattern of activity distinct from its predecessors like methotrexate (MTX). We sought to understand the activity and mechanisms of resistance of multiple myeloma to these drugs, which could also offer potential strategies for selective use of the drug. We demonstrate that PDX and MTX both induce a significant decrease in cell viability in the low nanomolar range, with PDX exhibiting a more potent effect. We identified a series of myeloma cell lines exhibiting markedly different patterns of sensitivity to the drugs, with some lines frankly resistant, and others exquisitely sensitive. These differences were largely attributed to the basal RFC (Reduced Folate Carrier) mRNA expression levels. RFC mRNA expression correlated directly with rates of drug uptake, with the most sensitive lines exhibiting the most significant intracellular accumulation of pralatrexate. This mechanism explains the widely varying patterns of sensitivity and resistance to pralatrexate in multiple myeloma cell lines. These findings could have implications for this class of drugs and their role in the treatment of multiple myeloma.
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Affiliation(s)
- Cristina Kinahan
- Columbia University Medical Center, Center for Lymphoid Malignancies, New York, NY, USA.,Co-first authors
| | - Michael A Mangone
- Columbia University Medical Center, Center for Lymphoid Malignancies, New York, NY, USA.,Co-first authors
| | - Luigi Scotto
- Columbia University Medical Center, Center for Lymphoid Malignancies, New York, NY, USA
| | - Michele Visentin
- Department of Clinical Pharmacology and Toxicology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Enrica Marchi
- Columbia University Medical Center, Center for Lymphoid Malignancies, New York, NY, USA
| | - Hearn Jay Cho
- Department of Hematology and Medical Oncology, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Owen A O'Connor
- Columbia University Medical Center, Center for Lymphoid Malignancies, New York, NY, USA
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14
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Obata Y, Hara Y, Shiina I, Murata T, Tasaki Y, Suzuki K, Ito K, Tsugawa S, Yamawaki K, Takahashi T, Okamoto K, Nishida T, Abe R. N822K- or V560G-mutated KIT activation preferentially occurs in lipid rafts of the Golgi apparatus in leukemia cells. Cell Commun Signal 2019; 17:114. [PMID: 31484543 PMCID: PMC6727407 DOI: 10.1186/s12964-019-0426-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 08/22/2019] [Indexed: 02/07/2023] Open
Abstract
Background KIT tyrosine kinase is expressed in mast cells, interstitial cells of Cajal, and hematopoietic cells. Permanently active KIT mutations lead these host cells to tumorigenesis, and to such diseases as mast cell leukemia (MCL), gastrointestinal stromal tumor (GIST), and acute myeloid leukemia (AML). Recently, we reported that in MCL, KIT with mutations (D816V, human; D814Y, mouse) traffics to endolysosomes (EL), where it can then initiate oncogenic signaling. On the other hand, KIT mutants including KITD814Y in GIST accumulate on the Golgi, and from there, activate downstream. KIT mutations, such as N822K, have been found in 30% of core binding factor-AML (CBF-AML) patients. However, how the mutants are tyrosine-phosphorylated and where they activate downstream molecules remain unknown. Moreover, it is unclear whether a KIT mutant other than KITD816V in MCL is able to signal on EL. Methods We used leukemia cell lines, such as Kasumi-1 (KITN822K, AML), SKNO-1 (KITN822K, AML), and HMC-1.1 (KITV560G, MCL), to explore how KIT transduces signals in these cells and to examine the signal platform for the mutants using immunofluorescence microscopy and inhibition of intracellular trafficking. Results In AML cell lines, KITN822K aberrantly localizes to EL. After biosynthesis, KIT traffics to the cell surface via the Golgi and immediately migrates to EL through endocytosis in a manner dependent on its kinase activity. However, results of phosphorylation imaging show that KIT is preferentially activated on the Golgi. Indeed, blockade of KITN822K migration to the Golgi with BFA/M-COPA inhibits the activation of KIT downstream molecules, such as AKT, ERK, and STAT5, indicating that KIT signaling occurs on the Golgi. Moreover, lipid rafts in the Golgi play a role in KIT signaling. Interestingly, KITV560G in HMC-1.1 migrates and activates downstream in a similar manner to KITN822K in Kasumi-1. Conclusions In AML, KITN822K mislocalizes to EL. Our findings, however, suggest that the mutant transduces phosphorylation signals on lipid rafts of the Golgi in leukemia cells. Unexpectedly, the KITV560G signal platform in MCL is similar to that of KITN822K in AML. These observations provide new insights into the pathogenic role of KIT mutants as well as that of other mutant molecules. Electronic supplementary material The online version of this article (10.1186/s12964-019-0426-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yuuki Obata
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Yamazaki 2669, Noda, Chiba, 278-0022, Japan. .,Division of Cancer Differentiation, National Cancer Center Research Institute, Tsukiji 5-1-1, Chuo-ku, 104-0045, Tokyo, Japan.
| | - Yasushi Hara
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Yamazaki 2669, Noda, Chiba, 278-0022, Japan
| | - Isamu Shiina
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka 1-3, Shinjuku-ku, 162-8601, Tokyo, Japan
| | - Takatsugu Murata
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka 1-3, Shinjuku-ku, 162-8601, Tokyo, Japan
| | - Yasutaka Tasaki
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka 1-3, Shinjuku-ku, 162-8601, Tokyo, Japan
| | - Kyohei Suzuki
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka 1-3, Shinjuku-ku, 162-8601, Tokyo, Japan
| | - Keiichi Ito
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka 1-3, Shinjuku-ku, 162-8601, Tokyo, Japan
| | - Shou Tsugawa
- Division of Cancer Differentiation, National Cancer Center Research Institute, Tsukiji 5-1-1, Chuo-ku, 104-0045, Tokyo, Japan.,Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka 1-3, Shinjuku-ku, 162-8601, Tokyo, Japan
| | - Kouhei Yamawaki
- Division of Cancer Differentiation, National Cancer Center Research Institute, Tsukiji 5-1-1, Chuo-ku, 104-0045, Tokyo, Japan
| | - Tsuyoshi Takahashi
- Department of Surgery, Osaka University, Graduate School of Medicine, Yamadaoka 2-2, Suita, Osaka, 565-0871, Japan
| | - Koji Okamoto
- Division of Cancer Differentiation, National Cancer Center Research Institute, Tsukiji 5-1-1, Chuo-ku, 104-0045, Tokyo, Japan
| | - Toshirou Nishida
- National Cancer Center Hospital, Tsukiji 5-1-1, Chuo-ku, 104-0045, Tokyo, Japan
| | - Ryo Abe
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Yamazaki 2669, Noda, Chiba, 278-0022, Japan. .,SIRC, Teikyo University, Itabashi-ku 2-11-1, Itabashi-ku, 173-8605, Tokyo, Japan.
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15
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Ballester LY, Moghadamtousi SZ, Leeds NE, Huse JT, Fuller GN. Coexisting FGFR3 p.K650T mutation in two FGFR3-TACC3 fusion glioma cases. Acta Neuropathol Commun 2019; 7:63. [PMID: 31036092 PMCID: PMC6487516 DOI: 10.1186/s40478-019-0721-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 04/16/2019] [Indexed: 01/03/2023] Open
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16
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17
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Obata Y, Horikawa K, Shiina I, Takahashi T, Murata T, Tasaki Y, Suzuki K, Yonekura K, Esumi H, Nishida T, Abe R. Oncogenic Kit signalling on the Golgi is suppressed by blocking secretory trafficking with M-COPA in gastrointestinal stromal tumours. Cancer Lett 2017; 415:1-10. [PMID: 29196126 DOI: 10.1016/j.canlet.2017.11.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 11/14/2017] [Accepted: 11/23/2017] [Indexed: 02/08/2023]
Abstract
Most gastrointestinal stromal tumours (GISTs) are caused by constitutively active mutations in Kit tyrosine kinase. The drug imatinib, a specific Kit inhibitor, improves the prognosis of metastatic GIST patients, but these patients become resistant to the drug by acquiring secondary mutations in the Kit kinase domain. We recently reported that a Kit mutant causes oncogenic signals only on the Golgi apparatus in GISTs. In this study, we show that in GIST, 2-methylcoprophilinamide (M-COPA, also known as "AMF-26"), an inhibitor of biosynthetic protein trafficking from the endoplasmic reticulum (ER) to the Golgi, suppresses Kit autophosphorylation at Y703/Y721/Y730/Y936, resulting in blockade of oncogenic signalling. Results of our M-COPA treatment assay show that Kit Y703/Y730/Y936 in the ER are dephosphorylated by protein tyrosine phosphatases (PTPs), thus the ER-retained Kit is unable to activate downstream molecules. ER-localized Kit Y721 is not phosphorylated, but not due to PTPs. Importantly, M-COPA can inhibit the activation of the Kit kinase domain mutant, resulting in suppression of imatinib-resistant GIST proliferation. Our study demonstrates that Kit autophosphorylation is spatio-temporally regulated and may offer a new strategy for treating imatinib-resistant GISTs.
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Affiliation(s)
- Yuuki Obata
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda 278-0022, Chiba, Japan
| | - Keita Horikawa
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda 278-0022, Chiba, Japan
| | - Isamu Shiina
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Shinjuku-ku 162-8601, Tokyo, Japan
| | - Tsuyoshi Takahashi
- Department of Surgery, Graduate School of Medicine, Osaka University, Suita 565-0871, Osaka, Japan
| | - Takatsugu Murata
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Shinjuku-ku 162-8601, Tokyo, Japan
| | - Yasutaka Tasaki
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Shinjuku-ku 162-8601, Tokyo, Japan
| | - Kyohei Suzuki
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Shinjuku-ku 162-8601, Tokyo, Japan
| | - Keita Yonekura
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Shinjuku-ku 162-8601, Tokyo, Japan
| | - Hiroyasu Esumi
- Division of Clinical Research, Research Institute for Biomedical Sciences, Tokyo, University of Science, Japan
| | - Toshirou Nishida
- National Cancer Center Hospital, Chuo-ku, 104-0045, Tokyo, Japan
| | - Ryo Abe
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda 278-0022, Chiba, Japan.
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18
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Fukuhara S, Nomoto J, Kim SW, Taniguchi H, Miyagi Maeshima A, Tobinai K, Kobayashi Y. Partial deletion of the ALK gene in ALK-positive anaplastic large cell lymphoma. Hematol Oncol 2017; 36:150-158. [PMID: 28665006 DOI: 10.1002/hon.2455] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 06/03/2017] [Accepted: 06/05/2017] [Indexed: 12/20/2022]
Abstract
Anaplastic lymphoma kinase (ALK) protein is an orphan receptor tyrosine kinase that is constitutively activated by aberrant translocations of the ALK gene in anaplastic large cell lymphoma, ALK-positive and several other cancers. Additionally, aberrant mutation and amplification of the ALK gene, resulting in ALK kinase activation, were detected mainly in neuroblastoma. Recently, truncated ALK protein was also reported in neuroblastoma. Here, we describe a novel truncated form of the ALK transcript with in-frame skipping through exons 2 to 17 (ALKΔ2-17) in anaplastic large cell lymphoma, ALK-positive. The ALKΔ2-17 showed ligand-independent deregulated phosphorylation that initiated strong STAT3 signalling in NIH3T3 cells. The ALKΔ2-17-transduced NIH3T3 cells showed oncogenic potential in a colony formation assay. Our data indicate that the aberrant deletion of the ALK gene might be oncogenic, providing a novel insight into the oncogenic role of the ALK pathway.
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Affiliation(s)
- Suguru Fukuhara
- Department of Hematology, National Cancer Center Hospital, Tokyo, Japan.,Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo, Japan
| | - Junko Nomoto
- Department of Hematology, National Cancer Center Hospital, Tokyo, Japan
| | - Sung-Won Kim
- Department of Hematology, National Cancer Center Hospital, Tokyo, Japan
| | | | | | - Kensei Tobinai
- Department of Hematology, National Cancer Center Hospital, Tokyo, Japan
| | - Yukio Kobayashi
- Department of Hematology, National Cancer Center Hospital, Tokyo, Japan
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19
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Jeske YW, Ali S, Byron SA, Gao F, Mannel RS, Ghebre RG, DiSilvestro PA, Lele SB, Pearl ML, Schmidt AP, Lankes HA, Ramirez NC, Rasty G, Powell M, Goodfellow PJ, Pollock PM. FGFR2 mutations are associated with poor outcomes in endometrioid endometrial cancer: An NRG Oncology/Gynecologic Oncology Group study. Gynecol Oncol 2017; 145:366-373. [PMID: 28314589 PMCID: PMC5433848 DOI: 10.1016/j.ygyno.2017.02.031] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 02/15/2017] [Accepted: 02/17/2017] [Indexed: 11/19/2022]
Abstract
PURPOSE Activating FGFR2 mutations have been identified in ~10% of endometrioid endometrial cancers (ECs). We have previously reported that mutations in FGFR2 are associated with shorter disease free survival (DFS) in stage I/II EC patients. Here we sought to validate the prognostic importance of FGFR2 mutations in a large, multi-institutional patient cohort. METHODS Tumors were collected as part of the GOG 210 clinical trial "Molecular Staging of Endometrial Cancer" where samples underwent rigorous pathological review and had more than three years of detailed clinical follow-up. DNA was extracted and four exons encompassing the FGFR2 mutation hotspots were amplified and sequenced. RESULTS Mutations were identified in 144 of the 973 endometrioid ECs, of which 125 were classified as known activating mutations and were included in the statistical analyses. Consistent with FGFR2 having an association with more aggressive disease, FGFR2 mutations were more common in patients initially diagnosed with stage III/IV EC (29/170;17%) versus stage I/II EC (96/803; 12%; p=0.07, Chi-square test). Additionally, incidence of progression (progressed, recurred or died from disease) was significantly more prevalent (32/125, 26%) among patients with FGFR2 mutation versus wild type (120/848, 14%; p<0.001, Chi-square test). Using Cox regression analysis adjusting for known prognostic factors, patients with FGFR2 mutation had significantly (p<0.025) shorter progression-free survival (PFS; HR 1.903; 95% CI 1.177-3.076) and endometrial cancer specific survival (ECS; HR 2.013; 95% CI 1.096-3.696). CONCLUSION In summary, our findings suggest that clinical trials testing the efficacy of FGFR inhibitors in the adjuvant setting to prevent recurrence and death are warranted.
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Affiliation(s)
- Yvette W Jeske
- Queensland University of Technology (QUT) at the Translational Research Institute, Brisbane, Australia
| | - Shamshad Ali
- NRG Oncology Statistics and Data Management Center, Roswell Park Cancer Institute, Buffalo, NY, USA
| | - Sara A Byron
- Cancer and Cell Biology Division, Translational Genomics Research Institute, Phoenix, AZ, USA
| | - Feng Gao
- Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, St Louis, MO, USA
| | - Robert S Mannel
- Gynecologic Oncology, The Peggy and Charles Stephenson Cancer Center, The University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Rahel G Ghebre
- University of Minnesota Medical Center - Fairview, Minneapolis, MN, USA
| | | | - Shashikant B Lele
- Gynecologic Oncology, Roswell Park Cancer Institute, Buffalo, NY, USA
| | - Michael L Pearl
- Obstetrics and Gynecology, Stony Brook University Hospital, Stony Brook, NY, USA
| | - Amy P Schmidt
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St Louis, MO, USA
| | - Heather A Lankes
- NRG Oncology Statistics and Data Management Center, Roswell Park Cancer Institute, Buffalo, NY, USA
| | - Nilsa C Ramirez
- GOG Tissue Bank/NRG Oncology Biospecimen Bank - Columbus, Biopathology Center, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - Golnar Rasty
- Department of Laboratory Medicine, University of Toronto, ON, M5G2C, CANADA
| | - Matthew Powell
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St Louis, MO, USA
| | - Paul J Goodfellow
- Department of Obstetrics and Gynecology, The Ohio State University and James Comprehensive Cancer Center, Columbus, OH, USA
| | - Pamela M Pollock
- Queensland University of Technology (QUT) at the Translational Research Institute, Brisbane, Australia; Cancer and Cell Biology Division, Translational Genomics Research Institute, Phoenix, AZ, USA.
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20
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Hara Y, Obata Y, Horikawa K, Tasaki Y, Suzuki K, Murata T, Shiina I, Abe R. M-COPA suppresses endolysosomal Kit-Akt oncogenic signalling through inhibiting the secretory pathway in neoplastic mast cells. PLoS One 2017; 12:e0175514. [PMID: 28403213 PMCID: PMC5389679 DOI: 10.1371/journal.pone.0175514] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 03/27/2017] [Indexed: 01/28/2023] Open
Abstract
Gain-of-function mutations in Kit receptor tyrosine kinase result in the development of a variety of cancers, such as mast cell tumours, gastrointestinal stromal tumours (GISTs), acute myeloid leukemia, and melanomas. The drug imatinib, a selective inhibitor of Kit, is used for treatment of mutant Kit-positive cancers. However, mutations in the Kit kinase domain, which are frequently found in neoplastic mast cells, confer an imatinib resistance, and cancers expressing the mutants can proliferate in the presence of imatinib. Recently, we showed that in neoplastic mast cells that endogenously express an imatinib-resistant Kit mutant, Kit causes oncogenic activation of the phosphatidylinositol 3-kinase-Akt (PI3K-Akt) pathway and the signal transducer and activator of transcription 5 (STAT5) but only on endolysosomes and on the endoplasmic reticulum (ER), respectively. Here, we show a strategy for inhibition of the Kit-PI3K-Akt pathway in neoplastic mast cells by M-COPA (2-methylcoprophilinamide), an inhibitor of this secretory pathway. In M-COPA-treated cells, Kit localization in the ER is significantly increased, whereas endolysosomal Kit disappears, indicating that M-COPA blocks the biosynthetic transport of Kit from the ER. The drug greatly inhibits oncogenic Akt activation without affecting the association of Kit with PI3K, indicating that ER-localized Kit-PI3K complex is unable to activate Akt. Importantly, M-COPA but not imatinib suppresses neoplastic mast cell proliferation through inhibiting anti-apoptotic Akt activation. Results of our M-COPA treatment assay show that Kit can activate Erk not only on the ER but also on other compartments. Furthermore, Tyr568/570, Tyr703, Tyr721, and Tyr936 in Kit are phosphorylated on the ER, indicating that these five tyrosine residues are all phosphorylated before mutant Kit reaches the plasma membrane (PM). Our study provides evidence that Kit is tyrosine-phosphorylated soon after synthesis on the ER but is unable to activate Akt and also demonstrates that M-COPA is efficacious for growth suppression of neoplastic mast cells.
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Affiliation(s)
- Yasushi Hara
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda, Chiba, Japan
| | - Yuuki Obata
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda, Chiba, Japan
- * E-mail:
| | - Keita Horikawa
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda, Chiba, Japan
| | - Yasutaka Tasaki
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan
| | - Kyohei Suzuki
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan
| | - Takatsugu Murata
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan
| | - Isamu Shiina
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan
| | - Ryo Abe
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda, Chiba, Japan
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21
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Obata Y, Horikawa K, Takahashi T, Akieda Y, Tsujimoto M, Fletcher JA, Esumi H, Nishida T, Abe R. Oncogenic signaling by Kit tyrosine kinase occurs selectively on the Golgi apparatus in gastrointestinal stromal tumors. Oncogene 2017; 36:3661-3672. [PMID: 28192400 PMCID: PMC5500841 DOI: 10.1038/onc.2016.519] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Revised: 12/13/2016] [Accepted: 12/27/2016] [Indexed: 02/06/2023]
Abstract
Gastrointestinal stromal tumors (GISTs) are caused by gain-of-function mutations in the Kit receptor tyrosine kinase. Most primary GIST patients respond to the Kit inhibitor imatinib, but this drug often becomes ineffective because of secondary mutations in the Kit kinase domain. The characteristic intracellular accumulation of imatinib-sensitive and -resistant Kit protein is well documented, but its relationship to oncogenic signaling remains unknown. Here, we show that in cancer tissue from primary GIST patients as well as in cell lines, mutant Kit accumulates on the Golgi apparatus, whereas normal Kit localizes to the plasma membrane (PM). In imatinib-resistant GIST with a secondary Kit mutation, Kit localizes predominantly on the Golgi apparatus. Both imatinib-sensitive and imatinib-resistant Kit (Kit(mut)) become fully auto-phosphorylated only on the Golgi and only if in a complex-glycosylated form. Kit(mut) accumulates on the Golgi during the early secretory pathway, but not after endocytosis. The aberrant kinase activity of Kit(mut) prevents its export from the Golgi to the PM. Furthermore, Kit(mut) on the Golgi signals and activates the phosphatidylinositol 3-kinase–Akt (PI3K–Akt) pathway, signal transducer and activator of transcription 5 (STAT5), and the Mek–Erk pathway. Blocking the biosynthetic transport of Kit(mut) to the Golgi from the endoplasmic reticulum inhibits oncogenic signaling. PM localization of Kit(mut) is not required for its signaling. Activation of Src-family tyrosine kinases on the Golgi is essential for oncogenic Kit signaling. These results suggest that the Golgi apparatus serves as a platform for oncogenic Kit signaling. Our study demonstrates that Kit(mut)’s pathogenicity is related to its mis-localization, and may offer a new strategy for treating imatinib-resistant GISTs.
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Affiliation(s)
- Y Obata
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda, Chiba, Japan
| | - K Horikawa
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda, Chiba, Japan
| | - T Takahashi
- Department of Surgery, Osaka University, Graduate School of Medicine, Suita, Osaka, Japan
| | - Y Akieda
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda, Chiba, Japan
| | - M Tsujimoto
- Department of Diagnostic Pathology, Osaka Police Hospital, Osaka, Osaka, Japan
| | - J A Fletcher
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - H Esumi
- Division of Clinical Research, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda, Chiba, Japan
| | - T Nishida
- National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
| | - R Abe
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda, Chiba, Japan
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Müller E, Bauer S, Stühmer T, Mottok A, Scholz CJ, Steinbrunn T, Brünnert D, Brandl A, Schraud H, Kreßmann S, Beilhack A, Rosenwald A, Bargou RC, Chatterjee M. Pan-Raf co-operates with PI3K-dependent signalling and critically contributes to myeloma cell survival independently of mutated RAS. Leukemia 2016; 31:922-933. [DOI: 10.1038/leu.2016.264] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 07/28/2016] [Accepted: 09/01/2016] [Indexed: 12/20/2022]
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Nelson KN, Meyer AN, Siari A, Campos AR, Motamedchaboki K, Donoghue DJ. Oncogenic Gene Fusion FGFR3-TACC3 Is Regulated by Tyrosine Phosphorylation. Mol Cancer Res 2016; 14:458-69. [DOI: 10.1158/1541-7786.mcr-15-0497] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 02/03/2016] [Indexed: 11/16/2022]
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24
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Walker BA, Boyle EM, Wardell CP, Murison A, Begum DB, Dahir NM, Proszek PZ, Johnson DC, Kaiser MF, Melchor L, Aronson LI, Scales M, Pawlyn C, Mirabella F, Jones JR, Brioli A, Mikulasova A, Cairns DA, Gregory WM, Quartilho A, Drayson MT, Russell N, Cook G, Jackson GH, Leleu X, Davies FE, Morgan GJ. Mutational Spectrum, Copy Number Changes, and Outcome: Results of a Sequencing Study of Patients With Newly Diagnosed Myeloma. J Clin Oncol 2015; 33:3911-20. [PMID: 26282654 PMCID: PMC6485456 DOI: 10.1200/jco.2014.59.1503] [Citation(s) in RCA: 411] [Impact Index Per Article: 45.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PURPOSE At the molecular level, myeloma is characterized by copy number abnormalities and recurrent translocations into the immunoglobulin heavy chain locus. Novel methods, such as massively parallel sequencing, have begun to describe the pattern of tumor-acquired mutations, but their clinical relevance has yet to be established. METHODS We performed whole-exome sequencing for 463 patients who presented with myeloma and were enrolled onto the National Cancer Research Institute Myeloma XI trial, for whom complete molecular cytogenetic and clinical outcome data were available. RESULTS We identified 15 significantly mutated genes: IRF4, KRAS, NRAS, MAX, HIST1H1E, RB1, EGR1, TP53, TRAF3, FAM46C, DIS3, BRAF, LTB, CYLD, and FGFR3. The mutational spectrum is dominated by mutations in the RAS (43%) and nuclear factor-κB (17%) pathways, but although they are prognostically neutral, they could be targeted therapeutically. Mutations in CCND1 and DNA repair pathway alterations (TP53, ATM, ATR, and ZNFHX4 mutations) are associated with a negative impact on survival. In contrast, those in IRF4 and EGR1 are associated with a favorable overall survival. We combined these novel mutation risk factors with the recurrent molecular adverse features and international staging system to generate an international staging system mutation score that can identify a high-risk population of patients who experience relapse and die prematurely. CONCLUSION We have refined our understanding of genetic events in myeloma and identified clinically relevant mutations that may be used to better stratify patients at presentation.
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Affiliation(s)
- Brian A Walker
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Eileen M Boyle
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Christopher P Wardell
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Alex Murison
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Dil B Begum
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Nasrin M Dahir
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Paula Z Proszek
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - David C Johnson
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Martin F Kaiser
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Lorenzo Melchor
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Lauren I Aronson
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Matthew Scales
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Charlotte Pawlyn
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Fabio Mirabella
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - John R Jones
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Annamaria Brioli
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Aneta Mikulasova
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - David A Cairns
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Walter M Gregory
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Ana Quartilho
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Mark T Drayson
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Nigel Russell
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Gordon Cook
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Graham H Jackson
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Xavier Leleu
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Faith E Davies
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France
| | - Gareth J Morgan
- Brian A. Walker, Eileen M. Boyle, Christopher P. Wardell, Alex Murison, Dil B. Begum, Nasrin M. Dahir, Paula Z. Proszek, David C. Johnson, Martin F. Kaiser, Lorenzo Melchor, Lauren I. Aronson, Charlotte Pawlyn, Fabio Mirabella, John R. Jones, Annamaria Brioli, Faith E. Davies, and Gareth J. Morgan, The Institute of Cancer Research, London; Matthew Scales, The Institute of Cancer Research, Surrey; David A. Cairns, Walter M. Gregory, and Ana Quartilho, University of Leeds; Gordon Cook, St James's University Hospital, Leeds; Mark T. Drayson, University of Birmingham, Birmingham; Nigel Russell, Nottingham University Hospital, Nottingham; Graham H. Jackson, Newcastle University, Newcastle upon Tyne, United Kingdom; Aneta Mikulasova, Masaryk University, Brno, Czech Republic; and Xavier Leleu, Hôpital C. Huriez, Centre Hospitalier Régional Universitaire de Lille, Lille, France.
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25
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Helsten T, Elkin S, Arthur E, Tomson BN, Carter J, Kurzrock R. The FGFR Landscape in Cancer: Analysis of 4,853 Tumors by Next-Generation Sequencing. Clin Cancer Res 2015; 22:259-67. [PMID: 26373574 DOI: 10.1158/1078-0432.ccr-14-3212] [Citation(s) in RCA: 505] [Impact Index Per Article: 56.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 07/20/2015] [Indexed: 02/06/2023]
Abstract
PURPOSE Molecular profiling may have prognostic and predictive value, and is increasingly used in the clinical setting. There are more than a dozen fibroblast growth factor receptor (FGFR) inhibitors in development. Optimal therapeutic application of FGFR inhibitors requires knowledge of the rates and types of FGFR aberrations in a variety of cancer types. EXPERIMENTAL DESIGN We analyzed frequencies of FGFR aberrations in 4,853 solid tumors that were, on physician request, tested in a Clinical Laboratory Improvement Amendments (CLIA) laboratory (Foundation Medicine) using next-generation sequencing (182 or 236 genes), and analyzed by N-of-One. RESULTS FGFR aberrations were found in 7.1% of cancers, with the majority being gene amplification (66% of the aberrations), followed by mutations (26%) and rearrangements (8%). FGFR1 (mostly amplification) was affected in 3.5% of 4,853 patients; FGFR2 in 1.5%; FGFR3 in 2.0%; and FGFR4 in 0.5%. Almost every type of malignancy examined showed some patients with FGFR aberrations, but the cancers most commonly affected were urothelial (32% FGFR-aberrant); breast (18%); endometrial (∼13%), squamous lung cancers (∼13%), and ovarian cancer (∼9%). Among 35 unique FGFR mutations seen in this dataset, all but two are found in COSMIC. Seventeen of the 35 are known to be activating, and 11 are transforming. CONCLUSIONS FGFR aberrations are common in a wide variety of cancers, with the majority being gene amplifications or activating mutations. These data suggest that FGFR inhibition could be an important therapeutic option across multiple tumor types.
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Affiliation(s)
- Teresa Helsten
- Center for Personalized Cancer Therapy, UC San Diego Moores Cancer Center, La Jolla, California.
| | | | - Elisa Arthur
- Center for Personalized Cancer Therapy, UC San Diego Moores Cancer Center, La Jolla, California
| | | | | | - Razelle Kurzrock
- Center for Personalized Cancer Therapy, UC San Diego Moores Cancer Center, La Jolla, California
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26
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Kuroda J, Kobayashi T, Taniwaki M. Prognostic indicators of lenalidomide for multiple myeloma: consensus and controversy. Expert Rev Anticancer Ther 2015; 15:787-804. [PMID: 25947283 DOI: 10.1586/14737140.2015.1044249] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The long-term outcome of multiple myeloma (MM) has been greatly improved through new agents, one being lenalidomide (LEN). Based upon the findings of in vitro experiments, its mode of action against MM occurs through a combination of direct tumoricidal effects on myeloma cells, modulatory effects on tumor immunity and tumor microenvironment-regulatory effects. However, it has not been clearly defined whether the clinical response and long-term outcome of MM with LEN treatment truly reflect the mechanisms of action of LEN proposed by in vitro studies. To ascertain what is known and what remains to be elucidated with LEN, we review the current literature on the mode of action of LEN in association with myeloma pathophysiology, and discuss the prognostic indicators in the treatment of MM with LEN.
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Affiliation(s)
- Junya Kuroda
- Department of Medicine, Division of Hematology and Oncology, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kamigyo-Ku, Kyoto, 602-8566, Japan
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27
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Walker BA, Wardell CP, Murison A, Boyle EM, Begum DB, Dahir NM, Proszek PZ, Melchor L, Pawlyn C, Kaiser MF, Johnson DC, Qiang YW, Jones JR, Cairns DA, Gregory WM, Owen RG, Cook G, Drayson MT, Jackson GH, Davies FE, Morgan GJ. APOBEC family mutational signatures are associated with poor prognosis translocations in multiple myeloma. Nat Commun 2015; 6:6997. [PMID: 25904160 PMCID: PMC4568299 DOI: 10.1038/ncomms7997] [Citation(s) in RCA: 223] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 03/24/2015] [Indexed: 12/12/2022] Open
Abstract
We have sequenced 463 presenting cases of myeloma entered into the UK Myeloma XI study using whole exome sequencing. Here we identify mutations induced as a consequence of misdirected AID in the partner oncogenes of IGH translocations, which are activating and associated with impaired clinical outcome. An APOBEC mutational signature is seen in 3.8% of cases and is linked to the translocation-mediated deregulation of MAF and MAFB, a known poor prognostic factor. Patients with this signature have an increased mutational load and a poor prognosis. Loss of MAF or MAFB expression results in decreased APOBEC3B and APOBEC4 expression, indicating a transcriptional control mechanism. Kataegis, a further mutational pattern associated with APOBEC deregulation, is seen at the sites of the MYC translocation. The APOBEC mutational signature seen in myeloma is, therefore, associated with poor prognosis primary and secondary translocations and the molecular mechanisms involved in generating them.
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Affiliation(s)
- Brian A Walker
- Division of Molecular Pathology, The Institute of Cancer Research, London SM2 5NG, UK
| | - Christopher P Wardell
- Division of Molecular Pathology, The Institute of Cancer Research, London SM2 5NG, UK
| | - Alex Murison
- Division of Molecular Pathology, The Institute of Cancer Research, London SM2 5NG, UK
| | - Eileen M Boyle
- Division of Molecular Pathology, The Institute of Cancer Research, London SM2 5NG, UK
| | - Dil B Begum
- Division of Molecular Pathology, The Institute of Cancer Research, London SM2 5NG, UK
| | - Nasrin M Dahir
- Division of Molecular Pathology, The Institute of Cancer Research, London SM2 5NG, UK
| | - Paula Z Proszek
- Division of Molecular Pathology, The Institute of Cancer Research, London SM2 5NG, UK
| | - Lorenzo Melchor
- Division of Molecular Pathology, The Institute of Cancer Research, London SM2 5NG, UK
| | - Charlotte Pawlyn
- Division of Molecular Pathology, The Institute of Cancer Research, London SM2 5NG, UK
| | - Martin F Kaiser
- Division of Molecular Pathology, The Institute of Cancer Research, London SM2 5NG, UK
| | - David C Johnson
- Division of Molecular Pathology, The Institute of Cancer Research, London SM2 5NG, UK
| | - Ya-Wei Qiang
- Myeloma Institute, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USA
| | - John R Jones
- Division of Molecular Pathology, The Institute of Cancer Research, London SM2 5NG, UK
| | - David A Cairns
- Clinical Trials Research Unit, University of Leeds, Leeds LS2 9JT, UK
| | - Walter M Gregory
- Clinical Trials Research Unit, University of Leeds, Leeds LS2 9JT, UK
| | - Roger G Owen
- St James's University Hospital, University of Leeds, Leeds LS2 9JT, UK
| | - Gordon Cook
- St James's University Hospital, University of Leeds, Leeds LS2 9JT, UK
| | - Mark T Drayson
- Clinical Immunology, School of Immunity &Infection, University of Birmingham, Birmingham B15 2TT, UK
| | - Graham H Jackson
- Department of Haematology, Newcastle University, Newcastle-Upon-Tyne NE1 7RU, UK
| | - Faith E Davies
- 1] Division of Molecular Pathology, The Institute of Cancer Research, London SM2 5NG, UK [2] Myeloma Institute, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USA
| | - Gareth J Morgan
- 1] Division of Molecular Pathology, The Institute of Cancer Research, London SM2 5NG, UK [2] Myeloma Institute, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, USA
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28
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Gallo LH, Nelson KN, Meyer AN, Donoghue DJ. Functions of Fibroblast Growth Factor Receptors in cancer defined by novel translocations and mutations. Cytokine Growth Factor Rev 2015; 26:425-49. [PMID: 26003532 DOI: 10.1016/j.cytogfr.2015.03.003] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 03/25/2015] [Indexed: 11/25/2022]
Abstract
The four receptor tyrosine kinases (RTKs) within the family of Fibroblast Growth Factor Receptors (FGFRs) are critical for normal development but also play an enormous role in oncogenesis. Mutations and/or abnormal expression often lead to constitutive dimerization and kinase activation of FGFRs, and represent the primary mechanism for aberrant signaling. Sequencing of human tumors has revealed a plethora of somatic mutations in FGFRs that are frequently identical to germline mutations in developmental syndromes, and has also identified novel FGFR fusion proteins arising from chromosomal rearrangements that contribute to malignancy. This review details approximately 200 specific point mutations in FGFRs and 40 different fusion proteins created by translocations involving FGFRs that have been identified in human cancer. This review discusses the effects of these genetic alterations on downstream signaling cascades, and the challenge of drug resistance in cancer treatment with antagonists of FGFRs.
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Affiliation(s)
- Leandro H Gallo
- Department of Chemistry and Biochemistry, Moores UCSD Cancer Center, University of California San Diego, La Jolla, CA 92093-0367, United States.
| | - Katelyn N Nelson
- Department of Chemistry and Biochemistry, Moores UCSD Cancer Center, University of California San Diego, La Jolla, CA 92093-0367, United States.
| | - April N Meyer
- Department of Chemistry and Biochemistry, Moores UCSD Cancer Center, University of California San Diego, La Jolla, CA 92093-0367, United States.
| | - Daniel J Donoghue
- Department of Chemistry and Biochemistry, Moores UCSD Cancer Center, University of California San Diego, La Jolla, CA 92093-0367, United States.
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29
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St-Germain JR, Taylor P, Zhang W, Li Z, Ketela T, Moffat J, Neel BG, Trudel S, Moran MF. Differential regulation of FGFR3 by PTPN1 and PTPN2. Proteomics 2014; 15:419-33. [PMID: 25311528 DOI: 10.1002/pmic.201400259] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 09/04/2014] [Accepted: 10/08/2014] [Indexed: 11/06/2022]
Abstract
Aberrant expression and activation of FGFR3 is associated with disease states including bone dysplasia and malignancies of bladder, cervix, and bone marrow. MS analysis of protein-phosphotyrosine in multiple myeloma cells revealed a prevalent phosphorylated motif, D/EYYR/K, derived from the kinase domain activation loops of tyrosine kinases including FGFR3 corresponding to a recognition sequence of protein-tyrosine phosphatase PTPN1. Knockdown of PTPN1 or the related enzyme PTPN2 by RNAi resulted in ligand-independent activation of FGFR3. Modulation of FGFR3 activation loop phosphorylation by both PTPN1 and PTPN2 was a function of receptor trafficking and phosphotyrosine phosphatase (PTP) compartmentalization. The FGFR3 activation loop motif DYYKK(650) is altered to DYYKE(650) in the oncogenic variant FGFR3(K650E) , and consequently it is constitutively fully activated and unaffected by activation loop phosphorylation. FGFR3(K650E) was nevertheless remarkably sensitive to negative regulation by PTPN1 and PTPN2. This suggests that in addition to modulating FGFR3 phosphorylation, PTPN1 and PTPN2 constrain the kinase domain by fostering an inactive-state. Loss of this constraint in response to ligand or impaired PTPN1/N2 may initiate FGFR3 activation. These results suggest a model wherein PTP expression levels may define conditions that select for ectopic FGFR3 expression and activation during tumorigenesis.
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Affiliation(s)
- Jonathan R St-Germain
- Program in Molecular Structure and Function, Hospital for Sick Children, Toronto, Canada; Department of Molecular Genetics, University of Toronto, Canada
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30
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Oncogenic Kit signals on endolysosomes and endoplasmic reticulum are essential for neoplastic mast cell proliferation. Nat Commun 2014; 5:5715. [PMID: 25493654 PMCID: PMC4284665 DOI: 10.1038/ncomms6715] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Accepted: 10/30/2014] [Indexed: 11/08/2022] Open
Abstract
Kit is a receptor-type tyrosine kinase found on the plasma membrane. It can transform mast cells through activating mutations. Here, we show that a mutant Kit from neoplastic mast cells from mice, Kit(D814Y), is permanently active and allows cells to proliferate autonomously. It does so by activating two signalling pathways from different intracellular compartments. Mutant Kit from the cell surface accumulates on endolysosomes through clathrin-mediated endocytosis, which requires Kit's kinase activity. Kit(D814Y) is constitutively associated with phosphatidylinositol 3-kinase, but the complex activates Akt only on the cytoplasmic surface of endolysosomes. It resists destruction because it is under-ubiquitinated. Kit(D814Y) also appears in the endoplasmic reticulum soon after biosynthesis, and there, can activate STAT5 aberrantly. These mechanisms of oncogenic signalling are also seen in rat and human mast cell leukemia cells. Thus, oncogenic Kit signalling occurs from different intracellular compartments, and the mutation acts by altering Kit trafficking as well as activation.
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31
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Tiong KH, Mah LY, Leong CO. Functional roles of fibroblast growth factor receptors (FGFRs) signaling in human cancers. Apoptosis 2014; 18:1447-68. [PMID: 23900974 PMCID: PMC3825415 DOI: 10.1007/s10495-013-0886-7] [Citation(s) in RCA: 112] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The fibroblast growth factor receptors (FGFRs) regulate important biological processes including cell proliferation and differentiation during development and tissue repair. Over the past decades, numerous pathological conditions and developmental syndromes have emerged as a consequence of deregulation in the FGFRs signaling network. This review aims to provide an overview of FGFR family, their complex signaling pathways in tumorigenesis, and the current development and application of therapeutics targeting the FGFRs signaling for treatment of refractory human cancers.
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Affiliation(s)
- Kai Hung Tiong
- School of Postgraduate Studies and Research, International Medical University, Bukit Jalil, 57000, Kuala Lumpur, Malaysia,
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32
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Sharonov GV, Bocharov EV, Kolosov PM, Astapova MV, Arseniev AS, Feofanov AV. Point mutations in dimerization motifs of the transmembrane domain stabilize active or inactive state of the EphA2 receptor tyrosine kinase. J Biol Chem 2014; 289:14955-64. [PMID: 24733396 DOI: 10.1074/jbc.m114.558783] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The EphA2 receptor tyrosine kinase plays a central role in the regulation of cell adhesion and guidance in many human tissues. The activation of EphA2 occurs after proper dimerization/oligomerization in the plasma membrane, which occurs with the participation of extracellular and cytoplasmic domains. Our study revealed that the isolated transmembrane domain (TMD) of EphA2 embedded into the lipid bicelle dimerized via the heptad repeat motif L(535)X3G(539)X2A(542)X3V(546)X2L(549) rather than through the alternative glycine zipper motif A(536)X3G(540)X3G(544) (typical for TMD dimerization in many proteins). To evaluate the significance of TMD interactions for full-length EphA2, we substituted key residues in the heptad repeat motif (HR variant: G539I, A542I, G553I) or in the glycine zipper motif (GZ variant: G540I, G544I) and expressed YFP-tagged EphA2 (WT, HR, and GZ variants) in HEK293T cells. Confocal microscopy revealed a similar distribution of all EphA2-YFP variants in cells. The expression of EphA2-YFP variants and their kinase activity (phosphorylation of Tyr(588) and/or Tyr(594)) and ephrin-A3 binding were analyzed with flow cytometry on a single cell basis. Activation of any EphA2 variant is found to occur even without ephrin stimulation when the EphA2 content in cells is sufficiently high. Ephrin-A3 binding is not affected in mutant variants. Mutations in the TMD have a significant effect on EphA2 activity. Both ligand-dependent and ligand-independent activities are enhanced for the HR variant and reduced for the GZ variant compared with the WT. These findings allow us to suggest TMD dimerization switching between the heptad repeat and glycine zipper motifs, corresponding to inactive and active receptor states, respectively, as a mechanism underlying EphA2 signal transduction.
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Affiliation(s)
- George V Sharonov
- From the Department of Structural Biology, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of RAS, 117997 Moscow, Russia, the Faculty of Medicine, Moscow State University, 119992 Moscow, Russia
| | - Eduard V Bocharov
- From the Department of Structural Biology, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of RAS, 117997 Moscow, Russia
| | - Peter M Kolosov
- the Department of Molecular Neurobiology, Institute of Higher Nervous Activity and Neurophysiology of RAS, 117485 Moscow, Russia, and
| | - Maria V Astapova
- From the Department of Structural Biology, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of RAS, 117997 Moscow, Russia
| | - Alexander S Arseniev
- From the Department of Structural Biology, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of RAS, 117997 Moscow, Russia
| | - Alexey V Feofanov
- From the Department of Structural Biology, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of RAS, 117997 Moscow, Russia, the Biological Faculty, Moscow State University, 119992 Moscow, Russia
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33
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Salgia R. Fibroblast growth factor signaling and inhibition in non-small cell lung cancer and their role in squamous cell tumors. Cancer Med 2014; 3:681-92. [PMID: 24711160 PMCID: PMC4101760 DOI: 10.1002/cam4.238] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 02/06/2014] [Accepted: 02/26/2014] [Indexed: 12/11/2022] Open
Abstract
With the introduction of targeted agents primarily applicable to non-small cell lung cancer (NSCLC) of adenocarcinoma histology, there is a heightened unmet need in the squamous cell carcinoma population. Targeting the angiogenic fibroblast growth factor (FGF)/FGF receptor (FGFR) signaling pathway is among the strategies being explored in squamous NSCLC; these efforts are supported by growth-promoting effects of FGF signaling in preclinical studies (including interactions with other pathways) and observations suggesting that FGF/FGFR-related aberrations may be more common in squamous versus adenocarcinoma and other histologies. A number of different anti-FGF/FGFR approaches have shown promise in preclinical studies. Clinical trials of two multitargeted tyrosine kinase inhibitors are restricting enrollment to patients with squamous NSCLC: a phase I/II trial of nintedanib added to first-line gemcitabine/cisplatin and a phase II trial of ponatinib for previously treated advanced disease, with the latter requiring not only squamous disease but also a confirmed FGFR kinase amplification or mutation. There are several ongoing clinical trials of multitargeted agents in general NSCLC populations, including but not limited to patients with squamous disease. Other FGF/FGFR-targeted agents are in earlier clinical development. While results are awaited from these clinical investigations in squamous NSCLC and other disease settings, additional research is needed to elucidate the role of FGF/FGFR signaling in the biology of NSCLC of different histologies.
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Affiliation(s)
- Ravi Salgia
- Section of Hematology/Oncology, Department of Medicine, University of Chicago, Chicago, Illinois
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34
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Lafitte M, Moranvillier I, Garcia S, Peuchant E, Iovanna J, Rousseau B, Dubus P, Guyonnet-Dupérat V, Belleannée G, Ramos J, Bedel A, de Verneuil H, Moreau-Gaudry F, Dabernat S. FGFR3 has tumor suppressor properties in cells with epithelial phenotype. Mol Cancer 2013; 12:83. [PMID: 23902722 PMCID: PMC3750311 DOI: 10.1186/1476-4598-12-83] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Accepted: 07/19/2013] [Indexed: 02/07/2023] Open
Abstract
Background Due to frequent mutations in certain cancers, FGFR3 gene is considered as an oncogene. However, in some normal tissues, FGFR3 can limit cell growth and promote cell differentiation. Thus, FGFR3 action appears paradoxical. Results FGFR3 expression was forced in pancreatic cell lines. The receptor exerted dual effects: it suppressed tumor growth in pancreatic epithelial-like cells and had oncogenic properties in pancreatic mesenchymal-like cells. Distinct exclusive pathways were activated, STATs in epithelial-like cells and MAP Kinases in mesenchymal-like cells. Both FGFR3 splice variants had similar effects and used the same intracellular signaling. In human pancreatic carcinoma tissues, levels of FGFR3 dropped in tumors. Conclusion In tumors from epithelial origin, FGFR3 signal can limit tumor growth, explaining why the 4p16.3 locus bearing FGFR3 is frequently lost and why activating mutations of FGFR3 in benign or low grade tumors of epithelial origin are associated with good prognosis. The new hypothesis that FGFR3 can harbor both tumor suppressive and oncogenic properties is crucial in the context of targeted therapies involving specific tyrosine kinase inhibitors (TKIs). TKIs against FGFR3 might result in adverse effects if used in the wrong cell context.
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Affiliation(s)
- Marie Lafitte
- INSERM U1035, Université Bordeaux Segalen, 146 rue Léo Saignat, Bordeaux 33076, France
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35
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Giacomini A, Righi M, Cleris L, Locatelli SL, Mitola S, Daidone MG, Gianni AM, Carlo-Stella C. Induction of death receptor 5 expression in tumor vasculature by perifosine restores the vascular disruption activity of TRAIL-expressing CD34(+) cells. Angiogenesis 2013; 16:707-22. [PMID: 23605004 DOI: 10.1007/s10456-013-9348-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Accepted: 04/15/2013] [Indexed: 01/31/2023]
Abstract
The proapoptotic death receptor 5 (DR5) expressed by tumor associated endothelial cells (TECs) mediates vascular disrupting effects of human CD34(+) cells engineered to express membrane-bound tumor necrosis factor-related apoptosis-inducing ligand (CD34-TRAIL (+) cells) in mice. Indeed, lack of DR5 on TECs causes resistance to CD34-TRAIL (+) cells. By xenografting in nonobese diabetic/severe combined immunodeficient mice the TRAIL-resistant lymphoma cell line SU-DHL-4V, which generates tumors lacking endothelial DR5 expression, here we demonstrate for the first time that the Akt inhibitor perifosine induces in vivo DR5 expression on TECs, thereby overcoming tumor resistance to the vascular disruption activity of CD34-TRAIL (+) cells. In fact, CD34-TRAIL (+) cells combined with perifosine, but not CD34-TRAIL (+) cells alone, exerted marked antivascular effects and caused a threefold increase of hemorrhagic necrosis in SU-DHL-4V tumors. Consistent with lack of DR5 expression, CD34-TRAIL (+) cells failed to affect the growth of SU-DHL-4V tumors, but CD34-TRAIL (+) cells plus perifosine reduced tumor volumes by 60 % compared with controls. In view of future clinical studies using membrane-bound TRAIL, our results highlight a strategy to rescue patients with primary or acquired resistance due to the lack of DR5 expression in tumor vasculature.
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Affiliation(s)
- Arianna Giacomini
- Department of Oncology and Hematology, Humanitas Cancer Center, Humanitas Clinical and Research Center, Via Manzoni, 56, 20089 Rozzano, Milan, Italy
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36
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Shimura Y, Kuroda J, Ri M, Nagoshi H, Yamamoto-Sugitani M, Kobayashi T, Kiyota M, Nakayama R, Mizutani S, Chinen Y, Sakamoto N, Matsumoto Y, Horiike S, Shiotsu Y, Iida S, Taniwaki M. RSK2(Ser227) at N-terminal kinase domain is a potential therapeutic target for multiple myeloma. Mol Cancer Ther 2012; 11:2600-9. [PMID: 23012246 DOI: 10.1158/1535-7163.mct-12-0605] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Multiple myeloma is an entity of cytogenetically and genetically heterogenous plasma cell neoplasms. Despite recent improvement in the treatment outcome of multiple myeloma by novel molecular-targeted chemotherapeutics, multiple myeloma remains incurable. The identification of a therapeutic target molecule in which various signaling for cell-survival converge is a core component for the development of new therapeutic strategies against multiple myeloma. RSK2 is an essential mediator of the ERK1/2 signaling pathway for cell survival and proliferation. In this study, we discovered that RSK2(Ser227), which is located at the N-terminal kinase domain and is one site responsible for substrate phosphorylation, is activated through phosphorylation regardless of the type of cytogenetic abnormalities or upstream molecular signaling in all 12 multiple myeloma-derived cell lines examined and 6 of 9 patient-derived CD138-positive primary myeloma cells. The chemical inhibition of RSK2(Ser227) by BI-D1870 or gene knockdown of RSK2 inhibits myeloma cell proliferation through apoptosis induction, and this anti-myeloma effect was accompanied by downregulation of c-MYC, cyclin D, p21(WAF1/CIP1), and MCL1. RSK2(Ser227) inhibition resulting from BI-D1870 treatment restored lenalidomide-induced direct cytotoxicity of myeloma cells from interleukin-6-mediated cell protection, showed no cross-resistance to bortezomib, and exerted additive/synergistic antiproliferative effects in conjunction with the mTOR, histone deacetylase, and BH3-mimicking BCL2/BCLX(L) inhibitors. These results suggest that RSK2(Ser227) is a potential therapeutic target not only for newly diagnosed but also for patients with later phase multiple myeloma who are resistant or refractory to currently available anti-myeloma therapies.
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Affiliation(s)
- Yuji Shimura
- Division of Hematology and Oncology, Department of Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
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The t(4;14) translocation and FGFR3 overexpression in multiple myeloma: prognostic implications and current clinical strategies. Blood Cancer J 2012; 2:e89. [PMID: 22961061 PMCID: PMC3461707 DOI: 10.1038/bcj.2012.37] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Multiple myeloma (MM) is a heterogeneous plasma cell disorder characterized by genetic abnormalities, including chromosomal translocations, deletions, duplications and genetic mutations. Translocations involving the immunoglobulin heavy chain region at chromosome 14q32 are observed in approximately 40% of patients with MM. Translocation of oncogenes into this region may lead to their increased expression, contributing to disease initiation, disease progression and therapeutic resistance. The t(4;14) translocation is associated with upregulation of the fibroblast growth factor receptor 3 (FGFR3) and the myeloma SET domain protein. Patients with t(4;14) demonstrate an overall poor prognosis that is only partially mitigated by the use of the novel agents bortezomib and lenalidomide; as such, an unmet medical need remains for patients with this aberration. Preclinical studies of inhibitors of FGFR3 have shown promise in t(4;14) MM, and these studies have led to the initiation of clinical trials. Data from these trials will help to determine the clinical utility of FGFR3 inhibitors for patients with t(4;14) MM and may pave the way for personalized medicine in patients with this incurable disease.
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Chell V, Balmanno K, Little AS, Wilson M, Andrews S, Blockley L, Hampson M, Gavine PR, Cook SJ. Tumour cell responses to new fibroblast growth factor receptor tyrosine kinase inhibitors and identification of a gatekeeper mutation in FGFR3 as a mechanism of acquired resistance. Oncogene 2012; 32:3059-70. [PMID: 22869148 DOI: 10.1038/onc.2012.319] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Fibroblast growth factor receptors (FGFRs) can act as driving oncoproteins in certain cancers, making them attractive drug targets. Here we have characterized tumour cell responses to two new inhibitors of FGFR1-3, AZ12908010 and the clinical candidate AZD4547, making comparisons with the well-characterized FGFR inhibitor PD173074. In a panel of 16 human tumour cell lines, the anti-proliferative activity of AZ12908010 or AZD4547 was strongly linked to the presence of deregulated FGFR signalling, indicating that addiction to deregulated FGFRs provides a therapeutic opportunity for selective intervention. Acquired resistance to targeted tyrosine kinase inhibitors is a growing problem in the clinic but has not yet been explored for FGFR inhibitors. To assess how FGFR-dependent tumour cells adapt to long-term FGFR inhibition, we generated a derivative of the KMS-11 myeloma cell line (FGFR(Y373C)) with acquired resistance to AZ12908010 (KMS-11R cells). Basal phosphorylated FGFR and FGFR-dependent downstream signalling were constitutively elevated and refractory to drug in KMS-11R cells. Sequencing of FGFR3 in KMS-11R cells revealed the presence of a heterozygous mutation at the gatekeeper residue, encoding FGFR3(V555M); consistent with this, KMS-11R cells were cross-resistant to AZD4547 and PD173074. These results define the selectivity and efficacy of two new FGFR inhibitors and identify a secondary gatekeeper mutation as a mechanism of acquired resistance to FGFR inhibitors that should be anticipated as clinical evaluation proceeds.
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Affiliation(s)
- V Chell
- Signalling Laboratory, The Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, UK
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Phage displayed peptides/antibodies recognizing growth factors and their tyrosine kinase receptors as tools for anti-cancer therapeutics. Int J Mol Sci 2012; 13:5254-5277. [PMID: 22606042 PMCID: PMC3344278 DOI: 10.3390/ijms13045254] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Revised: 04/09/2012] [Accepted: 04/20/2012] [Indexed: 12/21/2022] Open
Abstract
The basic idea of displaying peptides on a phage, introduced by George P. Smith in 1985, was greatly developed and improved by McCafferty and colleagues at the MRC Laboratory of Molecular Biology and, later, by Barbas and colleagues at the Scripps Research Institute. Their approach was dedicated to building a system for the production of antibodies, similar to a naïve B cell repertoire, in order to by-pass the standard hybridoma technology that requires animal immunization. Both groups merged the phage display technology with an antibody library to obtain a huge number of phage variants, each of them carrying a specific antibody ready to bind its target molecule, allowing, later on, rare phage (one in a million) to be isolated by affinity chromatography. Here, we will briefly review the basis of the technology and the therapeutic application of phage-derived bioactive molecules when addressed against key players in tumor development and progression: growth factors and their tyrosine kinase receptors.
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Foldynova-Trantirkova S, Wilcox WR, Krejci P. Sixteen years and counting: the current understanding of fibroblast growth factor receptor 3 (FGFR3) signaling in skeletal dysplasias. Hum Mutat 2011; 33:29-41. [PMID: 22045636 DOI: 10.1002/humu.21636] [Citation(s) in RCA: 150] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Accepted: 09/30/2011] [Indexed: 11/09/2022]
Abstract
In 1994, the field of bone biology was significantly advanced by the discovery that activating mutations in the fibroblast growth factor receptor 3 (FGFR3) receptor tyrosine kinase (TK) account for the common genetic form of dwarfism in humans, achondroplasia (ACH). Other conditions soon followed, with the list of human disorders caused by FGFR3 mutations now reaching at least 10. An array of vastly different diagnoses is caused by similar mutations in FGFR3, including syndromes affecting skeletal development (hypochondroplasia [HCH], ACH, thanatophoric dysplasia [TD]), skin (epidermal nevi, seborrhaeic keratosis, acanthosis nigricans), and cancer (multiple myeloma [MM], prostate and bladder carcinoma, seminoma). Despite many years of research, several aspects of FGFR3 function in disease remain obscure or controversial. As FGFR3-related skeletal dysplasias are caused by growth attenuation of the cartilage, chondrocytes appear to be unique in their response to FGFR3 activation. However, the reasons why FGFR3 inhibits chondrocyte growth while causing excessive cellular proliferation in cancer are not clear. Likewise, the full spectrum of molecular events by which FGFR3 mediates its signaling is just beginning to emerge. This article describes the challenging journey to unravel the mechanisms of FGFR3 function in skeletal dysplasias, the extraordinary cellular manifestations of FGFR3 signaling in chondrocytes, and finally, the progress toward therapy for ACH and cancer.
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Zhao G, Li WY, Chen D, Henry JR, Li HY, Chen Z, Zia-Ebrahimi M, Bloem L, Zhai Y, Huss K, Peng SB, McCann DJ. A novel, selective inhibitor of fibroblast growth factor receptors that shows a potent broad spectrum of antitumor activity in several tumor xenograft models. Mol Cancer Ther 2011; 10:2200-10. [PMID: 21900693 DOI: 10.1158/1535-7163.mct-11-0306] [Citation(s) in RCA: 153] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The fibroblast growth factor receptors (FGFR) are tyrosine kinases that are present in many types of endothelial and tumor cells and play an important role in tumor cell growth, survival, and migration as well as in maintaining tumor angiogenesis. Overexpression of FGFRs or aberrant regulation of their activities has been implicated in many forms of human malignancies. Therefore, targeting FGFRs represents an attractive strategy for development of cancer treatment options by simultaneously inhibiting tumor cell growth, survival, and migration as well as tumor angiogenesis. Here, we describe a potent, selective, small-molecule FGFR inhibitor, (R)-(E)-2-(4-(2-(5-(1-(3,5-Dichloropyridin-4-yl)ethoxy)-1H-indazol-3yl)vinyl)-1H-pyrazol-1-yl)ethanol, designated as LY2874455. This molecule is active against all 4 FGFRs, with a similar potency in biochemical assays. It exhibits a potent activity against FGF/FGFR-mediated signaling in several cancer cell lines and shows an excellent broad spectrum of antitumor activity in several tumor xenograft models representing the major FGF/FGFR relevant tumor histologies including lung, gastric, and bladder cancers and multiple myeloma, and with a well-defined pharmacokinetic/pharmacodynamic relationship. LY2874455 also exhibits a 6- to 9-fold in vitro and in vivo selectivity on inhibition of FGF- over VEGF-mediated target signaling in mice. Furthermore, LY2874455 did not show VEGF receptor 2-mediated toxicities such as hypertension at efficacious doses. Currently, this molecule is being evaluated for its potential use in the clinic.
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Affiliation(s)
- Genshi Zhao
- Cancer Research, DC0434, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN 46285, USA.
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Abstract
FGFs (fibroblast growth factors) and their receptors (FGFRs) play essential roles in tightly regulating cell proliferation, survival, migration and differentiation during development and adult life. Deregulation of FGFR signalling, on the other hand, has been associated with many developmental syndromes, and with human cancer. In cancer, FGFRs have been found to become overactivated by several mechanisms, including gene amplification, chromosomal translocation and mutations. FGFR alterations are detected in a variety of human cancers, such as breast, bladder, prostate, endometrial and lung cancers, as well as haematological malignancies. Accumulating evidence indicates that FGFs and FGFRs may act in an oncogenic fashion to promote multiple steps of cancer progression by inducing mitogenic and survival signals, as well as promoting epithelial-mesenchymal transition, invasion and tumour angiogenesis. Therapeutic strategies targeting FGFs and FGFRs in human cancer are therefore currently being explored. In the present review we will give an overview of FGF signalling, the main FGFR alterations found in human cancer to date, how they may contribute to specific cancer types and strategies for therapeutic intervention.
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de Brito LR, Batey MA, Zhao Y, Squires MS, Maitland H, Leung HY, Hall AG, Jackson G, Newell DR, Irving JA. Comparative pre-clinical evaluation of receptor tyrosine kinase inhibitors for the treatment of multiple myeloma. Leuk Res 2011; 35:1233-40. [DOI: 10.1016/j.leukres.2011.01.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Revised: 11/26/2010] [Accepted: 01/14/2011] [Indexed: 01/28/2023]
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Shih AJ, Telesco SE, Radhakrishnan R. Analysis of Somatic Mutations in Cancer: Molecular Mechanisms of Activation in the ErbB Family of Receptor Tyrosine Kinases. Cancers (Basel) 2011; 3:1195-231. [PMID: 21701703 PMCID: PMC3119571 DOI: 10.3390/cancers3011195] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2011] [Revised: 02/28/2011] [Accepted: 03/01/2011] [Indexed: 01/02/2023] Open
Abstract
The ErbB/EGFR/HER family of kinases consists of four homologous receptor tyrosine kinases which are important regulatory elements in many cellular processes, including cell proliferation, differentiation, and migration. Somatic mutations in, or over-expression of, the ErbB family is found in many cancers and is correlated with a poor prognosis; particularly, clinically identified mutations found in non-small-cell lung cancer (NSCLC) of ErbB1 have been shown to increase its basal kinase activity and patients carrying these mutations respond remarkably to the small tyrosine kinase inhibitor gefitinib. Here, we analyze the potential effects of the currently catalogued clinically identified mutations in the ErbB family kinase domains on the molecular mechanisms of kinase activation. Recently, we identified conserved networks of hydrophilic and hydrophobic interactions characteristic to the active and inactive conformation, respectively. Here, we show that the clinically identified mutants influence the kinase activity in distinctive fashion by affecting the characteristic interaction networks.
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Affiliation(s)
- Andrew J. Shih
- Department of Bioengineering, University of Pennsylvania, 210 S. 33 Street, 240 Skirkanich Hall, Philadelphia, PA 19104, USA; E-Mails: (A.J.S.); (S.E.T)
| | - Shannon E. Telesco
- Department of Bioengineering, University of Pennsylvania, 210 S. 33 Street, 240 Skirkanich Hall, Philadelphia, PA 19104, USA; E-Mails: (A.J.S.); (S.E.T)
| | - Ravi Radhakrishnan
- Department of Bioengineering, University of Pennsylvania, 210 S. 33 Street, 240 Skirkanich Hall, Philadelphia, PA 19104, USA; E-Mails: (A.J.S.); (S.E.T)
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The novel JAK inhibitor AZD1480 blocks STAT3 and FGFR3 signaling, resulting in suppression of human myeloma cell growth and survival. Leukemia 2010; 25:538-50. [PMID: 21164517 DOI: 10.1038/leu.2010.289] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
IL-6 and downstream JAK-dependent signaling pathways have critical roles in the pathophysiology of multiple myeloma (MM). We investigated the effects of a novel small-molecule JAK inhibitor (AZD1480) on IL-6/JAK signal transduction and its biological consequences on the human myeloma-derived cell lines U266 and Kms.11. At low micromolar concentrations, AZD1480 blocks cell proliferation and induces apoptosis of myeloma cell lines. These biological responses to AZD1480 are associated with concomitant inhibition of phosphorylation of JAK2, STAT3 and MAPK signaling proteins. In addition, there is inhibition of expression of STAT3 target genes, particularly Cyclin D2. Examination of a wider variety of myeloma cells (RPMI 8226, OPM-2, NCI-H929, Kms.18, MM1.S and IM-9), as well as primary myeloma cells, showed that AZD1480 has broad efficacy. In contrast, viability of normal peripheral blood (PB) mononuclear cells and CD138(+) cells derived from healthy controls was not significantly inhibited. Importantly, AZD1480 induces cell death of Kms.11 cells grown in the presence of HS-5 bone marrow (BM)-derived stromal cells and inhibits tumor growth in a Kms.11 xenograft mouse model, accompanied with inhibition of phospho-FGFR3, phospho-JAK2, phospho-STAT3 and Cyclin D2 levels. In sum, AZD1480 blocks proliferation, survival, FGFR3 and JAK/STAT3 signaling in myeloma cells cultured alone or cocultured with BM stromal cells, and in vivo. Thus, AZD1480 represents a potential new therapeutic agent for patients with MM.
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Yue P, Forrest WF, Kaminker JS, Lohr S, Zhang Z, Cavet G. Inferring the functional effects of mutation through clusters of mutations in homologous proteins. Hum Mutat 2010; 31:264-71. [PMID: 20052764 DOI: 10.1002/humu.21194] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Inferring functional consequences is a bottleneck in high-throughput cancer mutation discovery and genetic association studies. Most polymorphisms and germline mutations are unlikely to have functionally significant consequences. Most cancer somatic mutations do not contribute to tumorigenesis and are not under selective pressure. Identifying and understanding functionally important mutations can clarify disease biology and lead to new therapeutic and diagnostic opportunities. We investigated the extent to which protein mutations with functional consequences are enriched in clusters at conserved positions across related proteins. We found that disease-causing mutations form clusters more than random mutations or single nucleotide polymorphisms, confirming that mutation hotspots occur at the domain level. In addition to helping to identify functionally significant mutations, analysis of clustered mutations can indicate the mechanism and consequences for protein function. Our analysis focused on somatic cancer mutations suggests functional impact for many, including singleton mutations in FGFR1, FGFR3, GFI1B, PIK3CG, RALB, RAP2B, and STK11. This provides evidence and generates mechanistic hypotheses for the contribution of such mutations to cancer. The same approach can be applied to mutations suspected of involvement in other diseases. An interactive Web application for browsing mutation clusters is available at http://www.mcluster.org.
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Affiliation(s)
- Peng Yue
- Department of Bioinformatics, Genentech Inc, South San Francisco, California 94080, USA.
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New insights into the mechanisms of hematopoietic cell transformation by activated receptor tyrosine kinases. Blood 2010; 116:2429-37. [PMID: 20581310 DOI: 10.1182/blood-2010-04-279752] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
A large number of alterations in genes encoding receptor tyrosine kinase (RTK), namely FLT3, c-KIT, platelet-derived growth factor (PDGF) receptors, fibroblast growth factor (FGF) receptors, and the anaplastic large cell lymphoma kinase (ALK), have been found in hematopoietic malignancies. They have drawn much attention after the development of tyrosine kinase inhibitors. RTK gene alterations include point mutations and gene fusions that result from chromosomal rearrangements. In both cases, they activate the kinase domain in the absence of ligand, producing a permanent signal for cell proliferation. Recently, this simple model has been refined. First, by contrast to wild-type RTK, many mutated RTK do not seem to signal from the plasma membrane, but from various locations inside the cell. Second, their signal transduction properties are altered: the pathways that are crucial for cell transformation, such as signal transducer and activator of transcription (STAT) factors, do not necessarily contribute to the physiologic functions of these receptors. Finally, different mechanisms prevent the termination of the signal, which normally occurs through receptor ubiquitination and degradation. Several mutations inactivating CBL, a key RTK E3 ubiquitin ligase, have been recently described. In this review, we discuss the possible links among RTK trafficking, signaling, and degradation in leukemic cells.
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FGFR3 mutational status and protein expression in patients with bladder cancer in a Jordanian population. Cancer Epidemiol 2010; 34:724-32. [PMID: 20542753 DOI: 10.1016/j.canep.2010.05.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2010] [Revised: 05/01/2010] [Accepted: 05/08/2010] [Indexed: 11/22/2022]
Abstract
Bladder cancer accounts for nearly 5% of all newly diagnosed cancers in Jordan, with a much higher frequency in males. Recent studies have shown that activating mutations in FGFR3 are the most common findings in non-invasive low grade bladder tumors. In this study, we, retrospectively, investigated a cohort of 121 bladder cancer patients with various grades and stages of the tumor for molecular changes in FGFR3. Overexpression of FGFR3 was observed in 49%, 34%, 15%, and 2% of pTa, pT1, pT2, and pT3 cases, respectively. Further, FGFR3 expression was positive in 45%, 26%, and 30% of G1, G2 and G3 cases, respectively. Mutational analysis of exons 7, 10 and 15 of FGFR3 identified four previously reported mutations, namely R248C (n=4; 10%), S249C (n=23; 59%), Y375C (n=7; 18%), G382R (n=4; 10%), and one novel mutation, G382E (n=1; 3%). Our results indicate that both mutations and overexpression of FGFR3 are correlated together, and are more prevalent in early stage (pTa and pT1) and low grade (G1 and G2) bladder tumors. Survival analysis showed no contribution of changes in FGFR3 on the patient's survival. Multivariate Cox proportional hazards model analysis of overall survival for the following variables: age, gender, stage and grade of tumor, and FGFR3 (expression and mutation) revealed that age, stage and grade of tumor are independent predictors of overall survival in patients with bladder cancer. Our work is the first to address the molecular status of FGFR3 in Jordanian patients with bladder cancer, and provides further support for FGFR3 as a key player in the initiation of bladder tumors.
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Krejci P, Murakami S, Prochazkova J, Trantirek L, Chlebova K, Ouyang Z, Aklian A, Smutny J, Bryja V, Kozubik A, Wilcox WR. NF449 is a novel inhibitor of fibroblast growth factor receptor 3 (FGFR3) signaling active in chondrocytes and multiple myeloma cells. J Biol Chem 2010; 285:20644-53. [PMID: 20439987 DOI: 10.1074/jbc.m109.083626] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The FGFR3 receptor tyrosine kinase represents an attractive target for therapy due to its role in several human disorders, including skeletal dysplasias, multiple myeloma, and cervical and bladder carcinomas. By using molecular library screening, we identified a compound named NF449 with inhibitory activity toward FGFR3 signaling. In cultured chondrocytes and murine limb organ culture, NF449 rescued FGFR3-mediated extracellular matrix loss and growth inhibition, which represent two major cellular phenotypes of aberrant FGFR3 signaling in cartilage. Similarly, NF449 antagonized FGFR3 action in the multiple myeloma cell lines OPM2 and KMS11, as evidenced by NF449-mediated reversal of ERK MAPK activation and transcript accumulation of CCL3 and CCL4 chemokines, both of which are induced by FGFR3 activation. In cell-free kinase assays, NF449 inhibited the kinase activity of both wild type and a disease-associated FGFR3 mutant (K650E) in a fashion that appeared non-competitive with ATP. Our data identify NF449 as a novel antagonist of FGFR3 signaling, useful for FGFR3 inhibition alone or in combination with inhibitors that target the ATP binding site.
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Affiliation(s)
- Pavel Krejci
- Medical Genetics Institute, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA.
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Nakashima T, Ishii T, Tagaya H, Seike T, Nakagawa H, Kanda Y, Akinaga S, Soga S, Shiotsu Y. New molecular and biological mechanism of antitumor activities of KW-2478, a novel nonansamycin heat shock protein 90 inhibitor, in multiple myeloma cells. Clin Cancer Res 2010; 16:2792-802. [PMID: 20406843 DOI: 10.1158/1078-0432.ccr-09-3112] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE The heat shock protein 90 (Hsp90) plays an important role in chaperoning oncogenic client proteins in multiple myeloma (MM) cells, and several Hsp90 inhibitors have shown antitumor activities both in vitro and in vivo. However the precise mechanism of action of Hsp90 inhibitor in MM has not been fully elucidated. EXPERIMENTAL DESIGN We evaluated the antitumor activities of KW-2478, a nonansamycin Hsp90 inhibitor, in MM cells with various chromosomal translocations of immunoglobulin heavy chain (IgH) loci both in vitro and in vivo. RESULTS Our studies revealed that exposure of KW-2478 to MM cells resulted in growth inhibition and apoptosis, which were associated with degradation of well-known client proteins as well as a decrease in IgH translocation products (FGFR3, c-Maf, and cyclin D1), and FGFR3 was shown to be a new client protein of Hsp90 chaperon complex. In addition, KW-2478 depleted the Hsp90 client Cdk9, a transcriptional kinase, and the phosphorylated 4E-BP1, a translational inhibitor. Both inhibitory effects of KW-2478 on such transcriptional and translational pathways were shown to reduce c-Maf and cyclin D1 expression. In NCI-H929 s.c. inoculated model, KW-2478 showed a significant suppression of tumor growth and induced the degradation of client proteins in tumors. Furthermore, in a novel orthotopic MM model of i.v. inoculated OPM-2/green fluorescent protein, KW-2478 showed a significant reduction of both serum M protein and MM tumor burden in the bone marrow. CONCLUSIONS These results suggest that targeting such diverse pathways by KW-2478 could be a promising strategy for the treatment of MM with various cytogenetic abnormalities.
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