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Papke DJ, Odintsov I, Dickson BC, Nucci MR, Agaimy A, Fletcher CDM. Myxoid Inflammatory Myofibroblastic Sarcoma: Clinicopathologic Analysis of 25 Cases of a Distinctive Sarcoma With Deceptively Bland Morphology and Aggressive Clinical Behavior. Am J Surg Pathol 2024; 48:1005-1016. [PMID: 38717131 DOI: 10.1097/pas.0000000000002231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2024]
Abstract
The number of recognized sarcoma types harboring targetable molecular alterations continues to increase. Here we present 25 examples of a distinctive myofibroblastic tumor, provisionally termed "myxoid inflammatory myofibroblastic sarcoma," which might be related to inflammatory myofibroblastic tumor, and which occurred in 13 males (52%) and 12 females at a median age of 37 years (range: 7 to 79 years). Primary tumor sites were peritoneum (18 patients; 72%), paratesticular (2; 8%), chest wall (1), upper extremity (1), esophagus (1), retroperitoneum (1), and uterus (1). Nine peritoneal tumors (50%) were multifocal at presentation; all other tumors were unifocal. Tumors showed bland-to-mildly-atypical neoplastic myofibroblasts in a myxoid stroma, with prominent inflammatory infiltrates in 22 cases (88%). Most tumors showed delicate branching stromal vessels like those of myxoid liposarcoma, and most showed infiltrative growth through non-neoplastic tissue. Immunohistochemistry demonstrated expression of SMA (19/25 tumors; 76%), desmin (13/22; 59%), and CD30 (5/11; 45%), while ALK was expressed in 1 tumor (of 25; 4%) that was negative for ALK rearrangement. Sequencing of 11 tumors showed seven to harbor tyrosine kinase fusions (4 PDGFRB , 2 PML :: JAK1 , 1 SEC31A :: PDGFRA ). Two instead harbored hot spot KRAS mutations (G12V and Q61H), and 2 were negative for known driving alterations. Clinical follow-up was available for 18 patients (72%; median: 2.7 years; range: 4 mo-12.3 years). Nine patients (50%) were alive with no evidence of disease, 5 (28%) died of disease, and 4 (22%) were alive with disease. Seven patients (39%) experienced peritoneal relapse or distant metastasis. Two patients showed disease progression on conventional, nontargeted chemotherapy. The patient whose tumor harbored SEC31A :: PDGFRA was treated after multiple relapses with imatinib and sunitinib therapy, with progression-free periods of 5 and 2 years, respectively. Despite its bland appearance, myxoid inflammatory myofibroblastic sarcoma harbors a significant risk for disseminated disease, particularly when it occurs in the peritoneum. Targeted therapy could be considered for patients with disseminated disease.
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Affiliation(s)
- David J Papke
- Department of Pathology, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA
| | - Igor Odintsov
- Department of Pathology, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA
| | | | - Marisa R Nucci
- Department of Pathology, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA
| | - Abbas Agaimy
- Institute of Pathology, Erlangen University Hospital, Friedrich Alexander University of Erlangen-Nuremberg, Erlangen, Germany
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Kannampuzha S, Murali R, Gopalakrishnan AV, Mukherjee AG, Wanjari UR, Namachivayam A, George A, Dey A, Vellingiri B. Novel biomolecules in targeted cancer therapy: a new approach towards precision medicine. Med Oncol 2023; 40:323. [PMID: 37804361 DOI: 10.1007/s12032-023-02168-6] [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: 07/10/2023] [Accepted: 08/18/2023] [Indexed: 10/09/2023]
Abstract
Cancer is a major threat to human life around the globe, and the discovery of novel biomolecules continue to be an urgent therapeutic need that is still unmet. Precision medicine relies on targeted therapeutic strategies. Researchers are better equipped to develop therapies that target proteins as they understand more about the genetic alterations and molecules that cause progression of cancer. There has been a recent diversification of the sorts of targets exploited in treatment. Therapeutic antibody and biotechnology advancements enabled curative treatments to reach previously inaccessible sites. New treatment strategies have been initiated for several undruggable targets. The application of tailored therapy has been proven to have efficient results in controlling cancer progression. Novel biomolecules like SMDCs, ADCs, mABs, and PROTACS has gained vast attention in the recent years. Several studies have shown that using these novel technology helps in reducing the drug dosage as well as to overcome drug resistance in different cancer types. Therefore, it is crucial to fully untangle the mechanism and collect evidence to understand the significance of these novel drug targets and strategies. This review article will be discussing the importance and role of these novel biomolecules in targeted cancer therapies.
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Affiliation(s)
- Sandra Kannampuzha
- Department of Biomedical Sciences, School of Biosciences and Technology, Vellore Institute of Technology (VIT), Vellore, Tamil Nadu, 632014, India
| | - Reshma Murali
- Department of Biomedical Sciences, School of Biosciences and Technology, Vellore Institute of Technology (VIT), Vellore, Tamil Nadu, 632014, India
| | - Abilash Valsala Gopalakrishnan
- Department of Biomedical Sciences, School of Biosciences and Technology, Vellore Institute of Technology (VIT), Vellore, Tamil Nadu, 632014, India.
| | - Anirban Goutam Mukherjee
- Department of Biomedical Sciences, School of Biosciences and Technology, Vellore Institute of Technology (VIT), Vellore, Tamil Nadu, 632014, India
| | - Uddesh Ramesh Wanjari
- Department of Biomedical Sciences, School of Biosciences and Technology, Vellore Institute of Technology (VIT), Vellore, Tamil Nadu, 632014, India
| | - Arunraj Namachivayam
- Department of Biomedical Sciences, School of Biosciences and Technology, Vellore Institute of Technology (VIT), Vellore, Tamil Nadu, 632014, India
| | - Alex George
- Jubilee Centre for Medical Research, Jubilee Mission Medical College and Research Institute, Thrissur, Kerala, India
| | - Abhijit Dey
- Department of Medical Services, MGM Cancer Institute, Chennai, Tamil Nadu, 600029, India
| | - Balachandar Vellingiri
- Human Molecular Cytogenetics and Stem Cell Laboratory, Department of Human Genetics and Molecular Biology, Bharathiar University, Coimbatore, Tamil Nadu, 641046, India
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3
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Maeda M, Ochiai K, Michishita M, Morimatsu M, Sakai H, Kinoshita N, Sakaue M, Onozawa E, Azakami D, Yamamoto M, Ishioka K, Sadahira T, Watanabe M, Tanaka Y. In vitro anticancer effects of alpelisib against PIK3CA‑mutated canine hemangiosarcoma cell lines. Oncol Rep 2022; 47:84. [PMID: 35234262 PMCID: PMC8908334 DOI: 10.3892/or.2022.8295] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 02/09/2022] [Indexed: 11/06/2022] Open
Affiliation(s)
- Marika Maeda
- Laboratory of Veterinary Hygiene, School of Veterinary Science, Nippon Veterinary and Life Science University, Tokyo 180‑8602, Japan
| | - Kazuhiko Ochiai
- Laboratory of Veterinary Hygiene, School of Veterinary Science, Nippon Veterinary and Life Science University, Tokyo 180‑8602, Japan
| | - Masaki Michishita
- Research Center for Animal Life Science, Nippon Veterinary and Life Science University, Tokyo 180‑8602, Japan
| | - Masami Morimatsu
- Laboratory of Laboratory Animal Science and Medicine, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido 060‑0818, Japan
| | - Hiroki Sakai
- Laboratory of Veterinary Pathology, Gifu University, Gifu 501‑1193, Japan
| | - Nayuta Kinoshita
- Laboratory of Laboratory Animal Science and Medicine, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo, Hokkaido 060‑0818, Japan
| | - Motoharu Sakaue
- Laboratory of Anatomy II, Department of Veterinary Medicine, Azabu University, Sagamihara-shi, Kanagawa 252‑5201, Japan
| | - Eri Onozawa
- School of Veterinary Nursing and Technology, Nippon Veterinary and Life Science University, Tokyo 180‑8602, Japan
| | - Daigo Azakami
- Laboratory of Clinical Oncology, Tokyo University of Agriculture and Technology, Tokyo 183‑8538, Japan
| | - Masami Yamamoto
- Division of Physiological Pathology, Nippon Veterinary and Life Science University, Tokyo 180‑8602, Japan
| | - Katsumi Ishioka
- School of Veterinary Nursing and Technology, Nippon Veterinary and Life Science University, Tokyo 180‑8602, Japan
| | - Takuya Sadahira
- Department of Urology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700‑0914, Japan
| | - Masami Watanabe
- Department of Urology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700‑0914, Japan
| | - Yoshikazu Tanaka
- Laboratory of Veterinary Hygiene, School of Veterinary Science, Nippon Veterinary and Life Science University, Tokyo 180‑8602, Japan
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Siavashi V, Nassiri SM, Rahbarghazi R, Mohseni Z, Sharifi AM. Distinct Tie2 tyrosine phosphorylation sites dictate phenotypic switching in endothelial progenitor cells. J Cell Physiol 2018; 234:6209-6219. [PMID: 30246247 DOI: 10.1002/jcp.27349] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 08/17/2018] [Indexed: 12/16/2022]
Abstract
Angiogenesis is a regulated process involving the proliferation, migration, and remodeling of different cell types particularly mature endothelial and their progenitor cells, nominated as endothelial progenitor cells (EPCs). Tie2/Tek is a tyrosine kinase receptor expressed by endothelial cells that induces signal transduction pathways involved in endothelial biology. To address the potential importance of the various tyrosine residues of Tie2 in EPC development, we generated a series of Tie2 tyrosine mutated (Y1106F, Y1100F, and Y1111F) EPCs and then assess the biological features of these cells. Clonogenic, tubulogenic, proliferative, migratory, and functional properties of these cells were analyzed. Next, GFP-positive EPCs containing Tie2 tyrosine mutations were systemically transplanted into sublethaly irradiated mice to analyze the potency of these cells for marrow reconstitution. We found that mutation in the Tie2 tyrosine 1106 residue directed EPCs toward a mature endothelial phenotype, which was associated with augmented tubulogenic and migratory properties, and increased phosphorylation of the active site (tyrosine 992) as well as increased vascular perfusion in the in vivo Matrigel plug assay. Moreover, transplantation of 1106 Tie2 mutant EPCs failed to reconstitute the bone marrow after myeloablation, whereas transplantation of EPCs with the 1100 or 1111 Tie2 tyrosine mutation resulted in bone marrow engraftment, leading to improved survival of recipient mice. Our findings demonstrate that the tyrosine 1106 residue in Tie2 plays a key role to maintain the stemness features of EPCs.
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Affiliation(s)
- Vahid Siavashi
- Department of Clinical Pathology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.,Department of Pharmacology, Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Seyed Mahdi Nassiri
- Department of Clinical Pathology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Reza Rahbarghazi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Applied Cell Sciences, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zahra Mohseni
- Department of Clinical Pathology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Ali Mohammad Sharifi
- Department of Pharmacology, Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
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5
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Ni W, Chen W, Lu Y. Emerging findings into molecular mechanism of brain metastasis. Cancer Med 2018; 7:3820-3833. [PMID: 29992751 PMCID: PMC6089171 DOI: 10.1002/cam4.1667] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Revised: 05/26/2018] [Accepted: 06/16/2018] [Indexed: 12/29/2022] Open
Abstract
Brain metastasis is an important cause of morbidity and mortality in cancer patients. Hence, the need to develop improved therapies to prevent and treat metastasis to the brain is becoming urgent. Recent studies in this area are bringing about some advanced progress on brain metastasis. It was concluded that the occurrence and poor prognosis of brain metastasis have been mostly attributed to the exclusion of anticancer drugs from the brain by the blood-brain barrier. And several highly potent new generation targeted drugs with enhanced CNS distribution have been developed constantly. However, the noted "seed and soil" hypothesis also suggests that the outcome of metastasis depends on the relationship between unique tumor cells and the specific organ microenvironment. Moreover, increasing studies in multiple tumor types demonstrated that brain metastasis has great molecular differences between primary tumors and extracranial metastasis to a large extent. Here, the authors summarized the most common malignancies that could lead to brain metastasis-lung cancer, breast cancer and melanoma and their related mutated factors. Only by comprehending a deeper understanding of the molecular mechanisms, more effective brain-specific therapies will be developed for brain metastasis.
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Affiliation(s)
- Wenting Ni
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia MedicaSchool of PharmacyNanjing University of Chinese MedicineNanjingChina
| | - Wenxing Chen
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia MedicaSchool of PharmacyNanjing University of Chinese MedicineNanjingChina
- Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine (TCM) Prevention and Treatment of TumorNanjingChina
| | - Yin Lu
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia MedicaSchool of PharmacyNanjing University of Chinese MedicineNanjingChina
- Jiangsu Collaborative Innovation Center of Traditional Chinese Medicine (TCM) Prevention and Treatment of TumorNanjingChina
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Pyuen AA, Meuten T, Rose BJ, Thamm DH. In vitro effects of PI3K/mTOR inhibition in canine hemangiosarcoma. PLoS One 2018; 13:e0200634. [PMID: 30011343 PMCID: PMC6047806 DOI: 10.1371/journal.pone.0200634] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 06/29/2018] [Indexed: 02/07/2023] Open
Abstract
While extremely rare in humans, hemangiosarcoma (HSA) accounts for nearly 2% of canine neoplasia, and is characterized by both aggressive local growth/invasion and a high rate of metastasis. Both canine and human HSA exhibit sustained aberrant PI3K/Akt/mTOR pathway signaling. The purpose of this study was to examine the in vitro effects of a novel dual PI3K/mTOR inhibitor, VDC-597, in three canine HSA cell lines (DEN-, CIN-, and SB-HSA). VDC-597 suppressed activation of both Akt and 4eBP1 in canine HSA cells in a dose-dependent fashion, with an IC50 of approximately 0.3 uM, a concentration predicted to be clinically achievable based on preliminary early-phase canine and human studies. VDC-597 dose-dependently reduced proliferation, migration, and vascular endothelial growth factor production in HSA cells, while promoting tumor cell apoptosis. VDC-597 demonstrated additive antiproliferative effects when combined with doxorubicin. These results suggest that inhibitors of the PI3K/mTOR pathway may act against multiple components of the neoplastic process, including proliferation/apoptosis, chemosensitivity, migration, and angiogenesis, and justify the evaluation of PI3K/mTOR inhibitors in canine, and potentially human, HSA.
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Affiliation(s)
- Alex A. Pyuen
- Flint Animal Cancer Center, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States of America
- Cell and Molecular Biology Graduate Program, Colorado State University, Fort Collins, CO, United States of America
| | - Travis Meuten
- Flint Animal Cancer Center, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States of America
| | - Barbara J. Rose
- Flint Animal Cancer Center, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States of America
| | - Douglas H. Thamm
- Flint Animal Cancer Center, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States of America
- Cell and Molecular Biology Graduate Program, Colorado State University, Fort Collins, CO, United States of America
- Comprehensive Cancer Center, University of Colorado, Aurora, CO, United States of America
- * E-mail:
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7
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Adachi M, Hoshino Y, Izumi Y, Takagi S. Immunohistochemical detection of a potential molecular therapeutic target for canine hemangiosarcoma. J Vet Med Sci 2015; 78:649-56. [PMID: 26685984 PMCID: PMC4873857 DOI: 10.1292/jvms.15-0625] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Canine hemangiosarcoma (HSA) is a progressive malignant neoplasm of dogs for which there is currently no effective treatment. A recent study suggested that receptor tyrosine kinases (RTKs), the PI3K/Akt/m-TOR and MAPK pathways are all activated in canine and human HSA. The aim of the present study was to investigate the overexpression of these proteins by immunohistochemistry in canine splenic HSA to identify potential molecular therapeutic targets. A total of 10 splenic HSAs and two normal splenic samples surgically resected from dogs were sectioned and stained with hematoxylin and eosin for histological diagnosis or analyzed using immunohistochemistry. The expression of RTKs, c-kit, VEGFR-2 and PDGFR-2, as well as PI3K/Akt/m-TOR and MEK was higher in canine splenic HSAs compared to normal spleens. These proteins may therefore be potential therapeutic targets in canine splenic HSA.
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Affiliation(s)
- Mami Adachi
- Laboratory of Advanced Veterinary Medicine, Department of Veterinary Clinical Sciences, Hokkaido University, Hokkaido 060-0818, Japan
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Berenstein R. Class III Receptor Tyrosine Kinases in Acute Leukemia - Biological Functions and Modern Laboratory Analysis. Biomark Insights 2015; 10:1-14. [PMID: 26309392 PMCID: PMC4527365 DOI: 10.4137/bmi.s22433] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 07/02/2015] [Accepted: 07/04/2015] [Indexed: 12/12/2022] Open
Abstract
Acute myeloid leukemia (AML) is a complex disease caused by deregulation of multiple signaling pathways. Mutations in class III receptor tyrosine kinases (RTKs) have been implicated in alteration of cell signals concerning the growth and differentiation of leukemic cells. Point mutations, insertions, or deletions of RTKs as well as chromosomal translocations induce constitutive activation of the receptor, leading to uncontrolled proliferation of undifferentiated myeloid blasts. Aberrations can occur in all domains of RTKs causing either the ligand-independent activation or mimicking the activated conformation. The World Health Organization recommended including RTK mutations in the AML classification since their detection in routine laboratory diagnostics is a major factor for prognostic stratification of patients. Polymerase chain reaction (PCR)-based methods are well-validated for the detection of fms-related tyrosine kinase 3 (FLT3) mutations and can easily be applied for other RTKs. However, when methodological limitations are reached, accessory techniques can be applied. For a higher resolution and more quantitative approach compared to agarose gel electrophoresis, PCR fragments can be separated by capillary electrophoresis. Furthermore, high-resolution melting and denaturing high-pressure liquid chromatography are reliable presequencing screening methods that reduce the sample amount for Sanger sequencing. Because traditional DNA sequencing is time-consuming, next-generation sequencing (NGS) is an innovative modern possibility to analyze a high amount of samples simultaneously in a short period of time. At present, standardized procedures for NGS are not established, but when this barrier is resolved, it will provide a new platform for rapid and reliable laboratory diagnostic of RTK mutations in patients with AML. In this article, the biological and physiological role of RTK mutations in AML as well as possible laboratory methods for their detection will be reviewed.
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Affiliation(s)
- Rimma Berenstein
- Department of Hematology, Oncology and Tumourimmunology, Charité Universitätsmedizin Berlin, Berlin, Germany
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Rai S, Tanaka H, Suzuki M, Ogoh H, Taniguchi Y, Morita Y, Shimada T, Tanimura A, Matsui K, Yokota T, Oritani K, Tanabe K, Watanabe T, Kanakura Y, Matsumura I. Clathrin assembly protein CALM plays a critical role in KIT signaling by regulating its cellular transport from early to late endosomes in hematopoietic cells. PLoS One 2014; 9:e109441. [PMID: 25279552 PMCID: PMC4184852 DOI: 10.1371/journal.pone.0109441] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 09/07/2014] [Indexed: 11/29/2022] Open
Abstract
CALM is implicated in the formation of clathrin-coated vesicles, which mediate endocytosis and intracellular trafficking of growth factor receptors and nutrients. We previously found that CALM-deficient mice suffer from severe anemia due to the impaired clathrin-mediated endocytosis of transferrin receptor in immature erythroblast. However, CALM has been supposed to regulate the growth and survival of hematopoietic stem/progenitor cells. So, in this study, we focused on the function of CALM in these cells. We here show that the number of Linage−Sca-1+KIT+ (LSK) cells decreased in the fetal liver of CALM−/− mice. Also, colony forming activity was impaired in CALM−/− LSK cells. In addition, SCF, FLT3, and TPO-dependent growth was severely impaired in CALM−/− LSK cells, while they can normally proliferate in response to IL-3 and IL-6. We also examined the intracellular trafficking of KIT using CALM−/− murine embryonic fibroblasts (MEFs) engineered to express KIT. At first, we confirmed that endocytosis of SCF-bound KIT was not impaired in CALM−/− MEFs by the internalization assay. However, SCF-induced KIT trafficking from early to late endosome was severely impaired in CALM−/− MEFs. As a result, although intracellular KIT disappeared 30 min after SCF stimulation in wild-type (WT) MEFs, it was retained in CALM−/− MEFs. Furthermore, SCF-induced phosphorylation of cytosolic KIT was enhanced and prolonged in CALM−/− MEFs compared with that in WT MEFs, leading to the excessive activation of Akt. Similar hyperactivation of Akt was observed in CALM−/− KIT+ cells. These results indicate that CALM is essential for the intracellular trafficking of KIT and its normal functions. Also, our data demonstrate that KIT located in the early endosome can activate downstream molecules as a signaling endosome. Because KIT activation is involved in the pathogenesis of some malignancies, the manipulation of CALM function would be an attractive therapeutic strategy.
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Affiliation(s)
- Shinya Rai
- Department of Hematology and Rheumatology, Kinki University Faculty of Medicine, Osaka, Japan
| | - Hirokazu Tanaka
- Department of Hematology and Rheumatology, Kinki University Faculty of Medicine, Osaka, Japan
- * E-mail:
| | - Mai Suzuki
- Division of Hematological Malignancy, National Cancer Center Research Institute, Tokyo, Japan
- Department of Biological Science, Graduate School of Humanities and Sciences, Nara Women’s University, Nara, Japan
| | - Honami Ogoh
- Department of Biological Science, Graduate School of Humanities and Sciences, Nara Women’s University, Nara, Japan
| | - Yasuhiro Taniguchi
- Department of Hematology and Rheumatology, Kinki University Faculty of Medicine, Osaka, Japan
| | - Yasuyoshi Morita
- Department of Hematology and Rheumatology, Kinki University Faculty of Medicine, Osaka, Japan
| | - Takahiro Shimada
- Department of Hematology and Rheumatology, Kinki University Faculty of Medicine, Osaka, Japan
| | - Akira Tanimura
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Keiko Matsui
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Takafumi Yokota
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Kenji Oritani
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Kenji Tanabe
- Medical Research Institute, Tokyo Women’s Medical University, Tokyo, Japan
| | - Toshio Watanabe
- Department of Biological Science, Graduate School of Humanities and Sciences, Nara Women’s University, Nara, Japan
| | - Yuzuru Kanakura
- Department of Hematology and Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Itaru Matsumura
- Department of Hematology and Rheumatology, Kinki University Faculty of Medicine, Osaka, Japan
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Leptin modification in chronic myeloid leukemia patients treated with imatinib: An emerging effect of targeted therapy. Leuk Res Rep 2013; 2:58-60. [PMID: 24371782 PMCID: PMC3850368 DOI: 10.1016/j.lrr.2013.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 07/05/2013] [Accepted: 07/21/2013] [Indexed: 11/24/2022] Open
Abstract
We evaluated serum leptin levels in 9 young chronic myeloid leukemia (CML) patients under imatinib therapy during a long-term follow-up. Body mass index (BMI) and fat mass percentage (%FM) were also measured. Leptin was above the normal range in 8 out of 9 patients. In one case the hormone was below the reference value. All subjects showed a normal BMI, but 3 had a small increase of FM%. One patient recovered the leptin normal value after imatinib suspension. A tendency to leptin normalization in patients switched to an intermittent therapy was also found. This study suggests that imatinib therapy may result in leptin alteration.
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Bossi D, Carlomagno F, Pallavicini I, Pruneri G, Trubia M, Raviele PR, Marinelli A, Anaganti S, Cox MC, Viale G, Santoro M, Di Fiore PP, Minucci S. Functional characterization of a novel FGFR1OP-RET rearrangement in hematopoietic malignancies. Mol Oncol 2013; 8:221-31. [PMID: 24315414 DOI: 10.1016/j.molonc.2013.11.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Revised: 10/29/2013] [Accepted: 11/11/2013] [Indexed: 01/08/2023] Open
Abstract
The RET (REarranged during Transfection) receptor tyrosine kinase is targeted by oncogenic rearrangements in thyroid and lung adenocarcinoma. Recently, a RET (exon 12) rearrangement with FGFR1OP [fibroblast growth factor receptor 1 (FGFR1) oncogene partner] (exon 12) was identified in one chronic myelomonocytic leukemia (CMML) patient. We report the molecular cloning and functional characterization of a novel FGFR1OP (exon 11)-RET (exon 11) gene fusion event (named FGFR1OP-RET), mediated by a reciprocal translocation t(6; 10)(q27; q11), in a patient affected by primary myelofibrosis (PMF) with secondary acute myeloid leukemia (AML). The FGFR1OP-RET fusion protein displayed constitutive tyrosine kinase and transforming activity in NIH3T3 fibroblasts, and induced IL3-independent growth and activation of PI3K/STAT signaling in hematopoietic Ba/F3 cells. FGFR1OP-RET supported cytokine-independent growth, protection from stress and enhanced self-renewal of primary murine hematopoietic progenitor and stem cells in vitro. In vivo, FGFR1OP-RET caused a spectrum of disease phenotypes, with >50% of mice showing a fatal myeloproliferative disorder (MPD). Other phenotypes were leukemia transplantable in secondary recipients, dramatic expansion of the mast cell lineage, and reduction of repopulating activity upon lethal irradiation. In conclusion, FGFR1OP-RET chimeric oncogenes are endowed with leukemogenic potential and associated to myeloid neoplasms (CMML and PMF/AML).
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MESH Headings
- Animals
- Chromosomes, Human, Pair 10/genetics
- Chromosomes, Human, Pair 10/metabolism
- Chromosomes, Human, Pair 6/genetics
- Chromosomes, Human, Pair 6/metabolism
- Hematologic Neoplasms/genetics
- Hematologic Neoplasms/metabolism
- Hematologic Neoplasms/pathology
- Humans
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive
- Mice
- NIH 3T3 Cells
- Oncogene Proteins, Fusion/genetics
- Oncogene Proteins, Fusion/metabolism
- Proto-Oncogene Proteins/genetics
- Proto-Oncogene Proteins/metabolism
- Proto-Oncogene Proteins c-ret/genetics
- Proto-Oncogene Proteins c-ret/metabolism
- Translocation, Genetic
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Affiliation(s)
- Daniela Bossi
- Department of Experimental Oncology, IEO, European Institute of Oncology, Milan, Italy
| | - Francesca Carlomagno
- Department of Biology and Cellular and Molecular Pathology, University Federico II, Naples, Italy
| | - Isabella Pallavicini
- Department of Experimental Oncology, IEO, European Institute of Oncology, Milan, Italy
| | - Giancarlo Pruneri
- Department of Pathology and Laboratory Medicine, European Institute of Oncology, Milan, Italy
| | - Maurizio Trubia
- Department of Experimental Oncology, IEO, European Institute of Oncology, Milan, Italy
| | | | | | - Suresh Anaganti
- Department of Biology and Cellular and Molecular Pathology, University Federico II, Naples, Italy
| | - Maria Christina Cox
- Department of Hematology, A.O. Sant'Andrea, University La Sapienza, Rome, Italy
| | - Giuseppe Viale
- Department of Pathology and Laboratory Medicine, European Institute of Oncology, Milan, Italy
| | - Massimo Santoro
- Department of Biology and Cellular and Molecular Pathology, University Federico II, Naples, Italy.
| | - Pier Paolo Di Fiore
- Department of Experimental Oncology, IEO, European Institute of Oncology, Milan, Italy; Department of Scienze della Salute, University of Milan, Via di Rudinì 8, 20122 Milan, Italy; IFOM, FIRC Institute of Molecular Oncology, Milan, Italy.
| | - Saverio Minucci
- Department of Experimental Oncology, IEO, European Institute of Oncology, Milan, Italy; Department of Biosciences, University of Milan, Milan, Italy.
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12
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Analysis of activated platelet-derived growth factor β receptor and Ras-MAP kinase pathway in equine sarcoid fibroblasts. BIOMED RESEARCH INTERNATIONAL 2013; 2013:283985. [PMID: 23936786 PMCID: PMC3726019 DOI: 10.1155/2013/283985] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Revised: 06/03/2013] [Accepted: 06/18/2013] [Indexed: 11/24/2022]
Abstract
Equine sarcoids are skin tumours of fibroblastic origin affecting equids worldwide. Bovine papillomavirus type-1 (BPV-1) and, less commonly, type-2 are recognized as etiological factors of sarcoids. The transforming activity of BPV is related to the functions of its major oncoprotein E5 which binds to the platelet-derived growth factor β receptor (PDGFβR) causing its phosphorylation and activation. In this study, we demonstrate, by coimmunoprecipitation and immunoblotting, that in equine sarcoid derived cell lines PDGFβR is phosphorylated and binds downstream molecules related to Ras-mitogen-activated protein kinase-ERK pathway thus resulting in Ras activation. Imatinib mesylate is a tyrosine kinase receptors inhibitor which selectively inhibits the activation of PDGFβR in the treatment of several human and animal cancers. Here we show that imatinib inhibits receptor phosphorylation, and cell viability assays demonstrate that this drug decreases sarcoid fibroblasts viability in a dose-dependent manner. This study contributes to a better understanding of the molecular mechanisms involved in the pathology of sarcoids and paves the way to a new therapeutic approach for the treatment of this common equine skin neoplasm.
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13
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Ponnurangam S, Standing D, Rangarajan P, Subramaniam D. Tandutinib inhibits the Akt/mTOR signaling pathway to inhibit colon cancer growth. Mol Cancer Ther 2013; 12:598-609. [PMID: 23427297 DOI: 10.1158/1535-7163.mct-12-0907] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The c-Kit receptor can activate distinct signaling pathways including phosphoinositide 3-kinase (PI3K)/Akt and mTOR. Aberrant c-Kit activation protects cells from apoptosis and enhances invasion of colon carcinoma cells. Tandutinib is a novel quinazoline-based inhibitor of the type III receptor tyrosine kinases including c-Kit. We determined the effect of tandutinib on colon cancer growth and identified a mechanism of action. Tandutinib inhibited phosphorylation of c-Kit, Akt, mTOR, and p70S6 kinase. In addition, tandutinib significantly inhibited the proliferation and colony formation ability of colon cancer cell lines but did not affect normal colonic epithelial cells. There were increased levels of activated caspase-3 and Bax/Bcl2 ratio, coupled with a reduction in cyclin D1, suggesting apoptosis. There was also a downregulation of COX-2, VEGF, and interleukin-8 expression, suggesting effects on cancer-promoting genes. In addition, overexpressing constitutively active Akt partially suppressed tandutinib-mediated colon cancer cell growth. In vivo, intraperitoneal administration of tandutinib significantly suppressed growth of colon cancer tumor xenografts. There was a reduction in CD31-positive blood vessels, suggesting that there was an effect on angiogenesis. Tandutinib treatment also inhibited the expression of cancer-promoting genes COX-2 and VEGF and suppressed the activation of Akt/mTOR signaling proteins in the xenograft tissues. Together, these data suggest that tandutinib is a novel potent therapeutic agent that can target the Akt/mTOR/p70S6K signaling pathway to inhibit tumor growth and angiogenesis.
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Affiliation(s)
- Sivapriya Ponnurangam
- Department of Molecular and Integrative Physiology, The University of Kansas Medical Center, Kansas City, KS 66160, USA
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14
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Murai A, Asa SA, Kodama A, Hirata A, Yanai T, Sakai H. Constitutive phosphorylation of the mTORC2/Akt/4E-BP1 pathway in newly derived canine hemangiosarcoma cell lines. BMC Vet Res 2012; 8:128. [PMID: 22839755 PMCID: PMC3438112 DOI: 10.1186/1746-6148-8-128] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Accepted: 07/18/2012] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Canine hemangiosarcoma (HSA) is a malignant tumor with poor long-term prognosis due to development of metastasis despite aggressive treatment. The phosphatidyl-inositol-3 kinase/Akt/mammalian target of rapamycin (PI3K/Akt/mTOR) pathway is involved in its endothelial pathologies; however, it remains unknown how this pathway plays a role in canine HSA. Here, we characterized new canine HSA cell lines derived from nude mice-xenografted canine HSAs and investigated the deregulation of the signaling pathways in these cell lines. RESULTS Seven canine HSA cell lines were established from 3 xenograft canine HSAs and showed characteristics of endothelial cells (ECs), that is, uptake of acetylated low-density lipoprotein and expression of canine-specific CD31 mRNA. They showed varied morphologies and mRNA expression levels for VEGF-A, bFGF, HGF, IGF-I, EGF, PDGF-B, and their receptors. Cell proliferation was stimulated by these growth factors and fetal bovine serum (FBS) in 1 cell line and by FBS alone in 3 cell lines. However, cell proliferation was not stimulated by growth factors and FBS in the remaining 3 cell lines. Phosphorylated p44/42 Erk1/2 was increased by FBS stimulation in 4 cell lines. In contrast, phosphorylation of Akt at Ser473, mTOR complex 1 (mTORC1) at Ser2448, and eukaryotic translation initiation factor 4E-binding protein 1 (4E-BP1) at Ser65 was high in serum-starved condition and not altered by FBS stimulation in 6 cell lines, despite increased phosphorylation of these residues in normal canine ECs. This suggested that the mTORC2/Akt/4E-BP1 pathway was constitutively activated in these 6 canine HSA cell lines. After cell inoculation into nude mice, canine HSA tumors were formed from 4 cell lines and showed Akt and 4E-BP1 phosphorylation identical to the parental cell lines. CONCLUSIONS Our findings suggest that the present cell lines may be useful tools for investigating the role of the mTORC2/Akt/4E-BP1 pathway in canine HSA formation both in vivo and in vitro.
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Affiliation(s)
- Atsuko Murai
- Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
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15
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Murai A, Abou Asa S, Kodama A, Sakai H, Hirata A, Yanai T. Immunohistochemical analysis of the Akt/mTOR/4E-BP1 signalling pathway in canine haemangiomas and haemangiosarcomas. J Comp Pathol 2012; 147:430-40. [PMID: 22789858 DOI: 10.1016/j.jcpa.2012.05.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Revised: 04/10/2012] [Accepted: 05/01/2012] [Indexed: 01/12/2023]
Abstract
The specific signalling pathways that are deregulated in canine endothelial tumours have not yet fully elucidated. Therefore, the aim of the present study was to examine activation of the Akt/mammalian target of rapamycin (mTOR)/eukaryotic initiation factor 4E-binding protein 1 (4E-BP1) signalling pathway in spontaneously arising canine haemangiomas (HAs) and haemangiosarcomas (HSAs) in order to identify novel molecular targets for treatment. Surgically-resected samples of HA (n = 27), HSA (n = 37), granulation tissue (n = 4) and normal skin (n = 4) were investigated by immunohistochemistry. Approximately 80% of the HSA samples had moderate to intense expression of phosphorylated Akt at Ser473 (p-Akt Ser473), p-Akt Thr308, p-4E-BP1 Thr37/46 and eukaryotic initiation factor 4E, which was significantly higher than in the HAs and was similar to the expression in activated endothelial cells (ECs). Although p-mTOR complex1 (p-mTORC1) Ser2448 was expressed by most of the activated ECs, only 35% of the HSA samples had weak to moderate expression. Because mTORC2 and phosphorylates Akt Ser473 was activated in HSA samples, the present findings suggest that the mTORC2/Akt/4E-BP1 pathway, regulated independently of mTORC1, may be important for targeting therapy in canine HSAs.
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Affiliation(s)
- A Murai
- Laboratory of Veterinary Pathology, Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
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16
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Vázquez-Franco JE, Reyes-Maldonado E, Vela-Ojeda J, Domínguez-López ML, Lezama RA. Src, Akt, NF-κB, BCL-2 and c-IAP1 may be involved in an anti-apoptotic effect in patients with BCR-ABL positive and BCR-ABL negative acute lymphoblastic leukemia. Leuk Res 2012; 36:862-7. [DOI: 10.1016/j.leukres.2012.03.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Revised: 03/22/2012] [Accepted: 03/25/2012] [Indexed: 12/28/2022]
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17
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Zeng Z, Wu Y. [Research progress in non-small cell lung cancer with concomitant EML4-ALK fusion gene and EGFR gene mutation]. ZHONGGUO FEI AI ZA ZHI = CHINESE JOURNAL OF LUNG CANCER 2012; 14:880-4. [PMID: 22104224 PMCID: PMC5999994 DOI: 10.3779/j.issn.1009-3419.2011.11.09] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
肺癌是最常见的恶性肿瘤之一,其中非小细胞肺癌(non-small cell lung cancer, NSCLC)占肺癌的80%-85%。分子靶向治疗是目前NSCLC最热门也是最具前景的领域之一,其中的热点分子包括表皮生长因子受体(epidermal growth factor receptor, EGFR)、棘皮动物微管样蛋白4-间变淋巴瘤激酶(echinoderm microtubule associated protein like4-anaplastic lymphoma kinase, EML4-ALK)等。既往研究认为EML4-ALK融合基因与EGFR突变不能共存。近期陆续报道了EML4-ALK融合基因与EGFR突变共存的病例。本文就EML4-ALK融合基因及EGFR突变基因的分子结构、发生率和目前已报道双突变患者的临床特点等进行综述。
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Affiliation(s)
- Zhu Zeng
- Guangdong Lung Cancer Institute, Guangdong General Hospital & Guangdong Academy of Medical Sciences, Guangzhou 510080, China
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18
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Alonci A, Allegra A, Russo S, Penna G, Bellomo G, D'Angelo A, Campo S, Cannavò A, Centorrino R, Musolino C. Imatinib mesylate therapy induces reduction in neutrophil gelatinase-associated lipocalin serum levels and increase in leptin concentrations in chronic myeloid leukemia patients in molecular remission. Acta Haematol 2011; 127:1-6. [PMID: 21986252 DOI: 10.1159/000330948] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Accepted: 07/13/2011] [Indexed: 01/15/2023]
Abstract
The aim of the present study was to determine serum levels of neutrophil gelatinase-associated lipocalin (NGAL) and leptin in patients with chronic myeloid leukemia (CML) at diagnosis and after imatinib therapy when patients achieved a complete molecular remission. The study was conducted on 22 patients with CML in the chronic phase and 10 healthy subjects. The median serum NGAL levels in CML patients at diagnosis were significantly higher compared to age-matched controls. After imatinib therapy, all patients achieved complete molecular remission and NGAL levels decreased and were found significantly lower with respect to the baseline. No significant correlations were found between NGAL levels and other disease parameters. Before imatinib therapy, the median blood leptin levels were not significantly different from those of controls. After therapy with imatinib, all patients in molecular remission presented an increase in leptin levels. Future research is eagerly awaited as it may demonstrate the real role of NGAL and leptin in the onset and progression of CML.
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Affiliation(s)
- Andrea Alonci
- Division of Hematology, Medicinal Chemistry Section, University of Messina, Italy
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19
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Yang J, Loughran TP. Potential clinical application of imatinib mesylate in patients with leukemic large granular lymphocytes. Leuk Lymphoma 2011; 52:1834-5. [DOI: 10.3109/10428194.2011.585675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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20
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Chaudhuri A, Xie MH, Yang B, Mahapatra K, Liu J, Marsters S, Bodepudi S, Ashkenazi A. Distinct involvement of the Gab1 and Grb2 adaptor proteins in signal transduction by the related receptor tyrosine kinases RON and MET. J Biol Chem 2011; 286:32762-74. [PMID: 21784853 DOI: 10.1074/jbc.m111.239384] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Although the signal transduction mechanisms of the receptor tyrosine kinase MET are well defined, less is known about its close relative RON. MET initiates intracellular signaling by autophosphorylation on specific cytoplasmic tyrosines that form docking sites for the adaptor proteins Grb2 and Gab1. Grb2 binds directly and is essential for all of the biological activities of MET. Gab1 docks either directly or indirectly via Grb2 and controls only a subset of MET functions. Because MET and RON possess similar adaptor binding sites, it was anticipated that their adaptor interactions would be conserved. Here we show that in contrast to MET, RON relies primarily on Gab1 for signal transmission. Surprisingly, disruption of the Grb2 docking site of RON or Grb2 depletion augments activity, whereas enhancement of Grb2 binding attenuates Gab1 recruitment and signaling. Hence, RON and MET differ in their adaptor interactions; furthermore, Grb2 performs a novel antagonistic role in the context of RON signaling.
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Affiliation(s)
- Amitabha Chaudhuri
- Department of Molecular Oncology, Genentech, Inc, South San Francisco, California 94080, USA.
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21
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Riera L, Lasorsa E, Ambrogio C, Surrenti N, Voena C, Chiarle R. Involvement of Grb2 adaptor protein in nucleophosmin-anaplastic lymphoma kinase (NPM-ALK)-mediated signaling and anaplastic large cell lymphoma growth. J Biol Chem 2010; 285:26441-50. [PMID: 20554525 DOI: 10.1074/jbc.m110.116327] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Most anaplastic large cell lymphomas (ALCL) express oncogenic fusion proteins derived from chromosomal translocations or inversions of the anaplastic lymphoma kinase (ALK) gene. Frequently ALCL carry the t(2;5) translocation, which fuses the ALK gene to the nucleophosmin (NPM1) gene. The transforming activity mediated by NPM-ALK fusion induces different pathways that control proliferation and survival of lymphoma cells. Grb2 is an adaptor protein thought to play an important role in ALK-mediated transformation, but its interaction with NPM-ALK, as well as its function in regulating ALCL signaling pathways and cell growth, has never been elucidated. Here we show that active NPM-ALK, but not a kinase-dead mutant, bound and induced Grb2 phosphorylation in tyrosine 160. An intact SH3 domain at the C terminus of Grb2 was required for Tyr(160) phosphorylation. Furthermore, Grb2 did not bind to a single region but rather to different regions of NPM-ALK, mainly Tyr(152-156), Tyr(567), and a proline-rich region, Pro(415-417). Finally, shRNA knockdown experiments showed that Grb2 regulates primarily the NPM-ALK-mediated phosphorylation of SHP2 and plays a key role in ALCL cell growth.
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Affiliation(s)
- Ludovica Riera
- Center for Experimental Research and Medical Studies, University of Torino, Torino, Italy
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22
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Stankov K, Bogdanović G, Popović S. [Tyrosine kinases in etiopathogenesis and therapy of malignant diseases--C-kit activating mutations]. MEDICINSKI PREGLED 2010; 63:380-386. [PMID: 21186551 DOI: 10.2298/mpns1006380s] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In the last 15 years, the introduction of molecular biology methods and techniques for identifying mutations and measuring gene expression levels of mutated genes since recently, have enabled precise molecular diagnostics, classification and assessment of prognosis and therapeutic response of malignant disease to specific therapies. The increased knowledge of the cancer genome and the introduction of multiple new technologies in cancer research have significantly improved the drug discovery process, leading to key success in targeted cancer therapeutics, including tyrosine kinase inhibitors. Tyrosine kinase inhibitors are the molecular targeted neoadjuvant and adjuvant therapy of various malignancies. Many more results which are expected from ongoing trials are necessary to specify the appropriate dosages, stages at which to start the treatment, and which therapeutic combinations to apply.
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23
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Molecular characterization and prognostic significance of FLT3 in CML progression. Leuk Res 2009; 34:995-1001. [PMID: 20031210 DOI: 10.1016/j.leukres.2009.11.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2009] [Revised: 11/09/2009] [Accepted: 11/10/2009] [Indexed: 11/23/2022]
Abstract
To characterize the molecular mechanisms involved in the transition from the chronic phase to blast crisis in chronic myelogenous leukemia (CML), gene expression profiles of leukemic cells from patients in the chronic and blast crisis phases were analyzed using an 8.7K cDNA chip and real-time PCR. A transient transfection analysis was conducted to evaluate the role of FLT3, which was significantly upregulated in the blast crisis patients. Abl and c-Kit induction was detected in K562 cells transfected with FLT3 cDNA (K562/FLT3), and Abl and c-Kit levels were reduced in K562/FLT3 cells transfected with FLT3-siRNA (K562/FLT3-siRNA). The induction of FLT3 in CML cells attenuated imatinib-induced apoptosis. The opposite effect was observed in K562/FLT3-siRNA cells. An increased level of cleaved PARP and decreased level of pro-caspase 3 were noted when K562/FLT3-siRNA cells were treated with imatinib. These findings indicate that FLT3 is associated with disease progression, despite imatinib therapy. These results may help in the prediction of disease progression in CML patients and the development of more appropriate therapeutic modalities.
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24
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Mochizuki M, Kwon YW, Yodoi J, Masutani H. Thioredoxin regulates cell cycle via the ERK1/2-cyclin D1 pathway. Antioxid Redox Signal 2009; 11:2957-71. [PMID: 19622016 DOI: 10.1089/ars.2009.2623] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Thioredoxin (TRX) is a key component of redox regulation and has been indicated to play an essential role in cell survival and growth. Here, we investigated the molecular mechanism of TRX in the regulation of cell survival and growth by using RNA interference (RNAi) in A549 lung cancer and MCF7 breast cancer cells. TRX knockdown did not significantly increase the basal level of cell death without exposure to stress, but CDDP-induced cell death was enhanced. Meanwhile, TRX knockdown resulted in significant cell-cycle arrest at the G(1) phase. Cyclin D1 expression was reduced by TRX knockdown at the protein and mRNA levels. TRX knockdown caused suppression of activation of the cyclin D1 promoter through elements including AP-1. TRX knockdown also reduced the levels of phosphorylated ERK1/2 and the nuclear translocation of ERK 1/2 induced by EGF. These results suggest that TRX is an important regulator of the cell cycle in the G(1) phase via cyclin D1 transcription and the ERK/AP-1 signaling pathways.
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Affiliation(s)
- Michika Mochizuki
- Department of Biological Responses, Institute for Virus Research, Kyoto, Japan
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25
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Beharry Z, Zemskova M, Mahajan S, Zhang F, Ma J, Xia Z, Lilly M, Smith CD, Kraft AS. Novel benzylidene-thiazolidine-2,4-diones inhibit Pim protein kinase activity and induce cell cycle arrest in leukemia and prostate cancer cells. Mol Cancer Ther 2009; 8:1473-83. [PMID: 19509254 DOI: 10.1158/1535-7163.mct-08-1037] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The Pim protein kinases play important roles in cancer development and progression, including prostate tumors and hematologic malignancies. To investigate the potential role of these enzymes as anticancer drug targets, we have synthesized novel benzylidene-thiazolidine-2,4-diones that function as potent Pim protein kinase inhibitors. With IC(50) values in the nanomolar range, these compounds block the ability of Pim to phosphorylate peptides and proteins in vitro and, when added to DU145 prostate cancer cells overexpressing Pim, inhibit the ability of this enzyme to phosphorylate a known substrate, the BH(3) protein BAD. When added to prostate cancer cell lines, including PC3, DU145, and CWR22Rv1, and human leukemic cells, MV4;11, K562, and U937 cells, these compounds induce G(1)-S cell cycle arrest and block the antiapoptotic effect of the Pim protein kinase. The cell cycle arrest induced by these compounds is associated with an inhibition of cyclin-dependent kinase 2 and activity and translocation of the Pim-1 substrate p27(Kip1), a cyclin-dependent kinase 2 inhibitory protein, to the nucleus. Furthermore, when added to leukemic cells, these compounds synergize with the mammalian target of rapamycin inhibitor rapamycin to decrease the phosphorylation level of the translational repressor 4E-BP1 at sites phosphorylated by mammalian target of rapamycin. Combinations of rapamycin and the benzylidene-thiazolidine-2,4-diones synergistically block the growth of leukemic cells. Thus, these agents represent novel Pim inhibitors and point to an important role for the Pim protein kinases in cell cycle control in multiple types of cancer cells.
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Affiliation(s)
- Zanna Beharry
- Hollings Cancer Center, Medical University of South Carolina, 86 Jonathan Lucas Street, Charleston, SC 29425, USA
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26
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Abella JV, Park M. Breakdown of endocytosis in the oncogenic activation of receptor tyrosine kinases. Am J Physiol Endocrinol Metab 2009; 296:E973-84. [PMID: 19240253 DOI: 10.1152/ajpendo.90857.2008] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
There is increasing evidence to support the concept that the malignant behavior of many tumors is sustained by the deregulated activation of growth factor receptors. Activation of receptor tyrosine kinases (RTKs) by their respective ligand(s) initiates cellular signals that tightly modulate cell proliferation, survival, differentiation and migration to ensure normal tissue patterning. Therefore, uncontrolled activation of such signals can have deleterious effects, leading to oncogenesis. To date, deregulation of most RTKs has been implicated in the development of cancer, although the mechanisms that lead to their deregulation are not yet fully understood (10). RTK endocytosis, the internalization and trafficking of receptors inside the cell, has long been established as a mechanism to attenuate RTK signaling. However, RTKs have been demonstrated to continue to signal along the endocytic pathway, which contributes to the spatio-temporal regulation of signal transduction. This review will focus on recent advances linking defective endocytosis of RTKs in the development of cancer.
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Affiliation(s)
- Jasmine V Abella
- Rosalind and Morris Goodman Cancer Centre, Montreal, H3A 1A3, QC, Canada
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27
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Rehman SK, Baldassarre G, Calin GA, Nicoloso MS. MicroRNAs: The Jack of All Trades. ACTA ACUST UNITED AC 2009. [DOI: 10.3816/clk.2009.n.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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28
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Translational research in complex etiopathogenesis and therapy of hematological malignancies: the specific role of tyrosine kinases signaling and inhibition. Med Oncol 2008; 26:437-44. [PMID: 19051068 DOI: 10.1007/s12032-008-9143-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2008] [Accepted: 11/20/2008] [Indexed: 10/21/2022]
Abstract
During the recent genomics and proteomics era, high-resolution, genome-wide approaches have revealed numerous promising new drug targets and disease biomarkers, accelerating and emphasizing the need for targeted molecular therapy compounds. Significant progress has been made in understanding the pathogenesis of hematological malignancies there by, revealing new drug targets. Introduction of multiple new technologies in cancer research have significantly improved the drug discovery process, leading to key success in targeted cancer therapeutics, including tyrosine kinase inhibitors. The studies of receptor tyrosine kinases and their role in malignant transformation are already translated from the preclinical level (cell-based and animal models) to clinical studies, enabling the more complete understanding of tumor cell biology and improvement of tumor therapy.
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29
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Mano H. Non-solid oncogenes in solid tumors: EML4-ALK fusion genes in lung cancer. Cancer Sci 2008; 99:2349-55. [PMID: 19032370 PMCID: PMC11158085 DOI: 10.1111/j.1349-7006.2008.00972.x] [Citation(s) in RCA: 177] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Revised: 08/13/2008] [Accepted: 08/14/2008] [Indexed: 11/28/2022] Open
Abstract
It is generally accepted that recurrent chromosome translocations play a major role in the molecular pathogenesis of hematological malignancies but not of solid tumors. However, chromosome translocations involving the e26 transformation-specific sequence transcription factor loci have been demonstrated recently in many prostate cancer cases. Furthermore, through a functional screening with retroviral cDNA expression libraries, we have discovered the fusion-type protein tyrosine kinase echinoderm microtubule-associated protein like-4 (EML4)-anaplastic lymphoma kinase (ALK) in non-small cell lung cancer (NSCLC) specimens. A recurrent chromosome translocation, inv(2)(p21p23), in NSCLC generates fused mRNA encoding the amino-terminal half of EML4 ligated to the intracellular region of the receptor-type protein tyrosine kinase ALK. EML4-ALK oligomerizes constitutively in cells through the coiled coil domain within the EML4 region, and becomes activated to exert a marked oncogenicity both in vitro and in vivo. Break and fusion points within the EML4 locus may diverge in NSCLC cells to generate various isoforms of EML4-ALK, which may constitute approximately 5% of NSCLC cases, at least in the Asian ethnic group. In the present review I summarize how detection of EML4-ALK cDNA may become a sensitive diagnostic means for NSCLC cases that are positive for the fusion gene, and discuss whether suppression of ALK enzymatic activity could be an effective treatment strategy against this intractable disorder.
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Affiliation(s)
- Hiroyuki Mano
- Division of Functional Genomics, Jichi Medical University, 3311-1 Yakushiji, Shimotsukeshi, Tochigi 329-0498, Japan.
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