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Zaka Khosravi S, Molaei Ramshe S, Allahbakhshian Farsani M, Moonesi M, Marofi F, Hagh MF. An overview of the molecular and clinical significance of the angiopoietin system in leukemia. J Recept Signal Transduct Res 2023:1-12. [PMID: 37186553 DOI: 10.1080/10799893.2023.2204983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The angiogenesis efficacy in solid tumors and hematological malignancies has been identified for more than twenty years. Although the exact role of angiogenesis in leukemia as a common hematological malignancy has not yet been extensively studied, its effect is demonstrated on the initiation and maintenance of a favorable microenvironment for leukemia cell proliferation. The angiopoietin family is a defined molecular mediator for angiogenesis, which contributes to vascular permeability and angiogenesis initiation. They participate in the angiogenesis process by binding to tyrosine kinase receptors (Tie) on endothelial cells. Considering the role of angiogenesis in leukemia development and the crucial effects of the Ang-Tie system in angiogenesis regulation, many studies have focused on the correlation between the Ang-Tie system and leukemia diagnosis, monitoring, and treatment. In this study, we reviewed the Ang-Tie system's potential diagnostic and therapeutic effects in different types of leukemia in the gene expression level analysis approach. The angiopoietin family context-dependent manner prevents us from defining its actual function in leukemia, emphasizing the need for more comprehensive studies.
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Affiliation(s)
- Saeed Zaka Khosravi
- Department of Immunology, Faculty of Medicine, Division of Hematology and Transfusion Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Samira Molaei Ramshe
- Department of Neurobiology, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Mehdi Allahbakhshian Farsani
- Department of Laboratory Hematology and Blood Bank, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammadreza Moonesi
- Department of Immunology, Faculty of Medicine, Division of Hematology and Transfusion Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Faroogh Marofi
- Department of Immunology, Faculty of Medicine, Division of Hematology and Transfusion Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Majid Farshdousti Hagh
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Khosravi SZ, Ramshe SM, Farsani MA, Solali S, Moonesi M, Hagh MF. Investigating the expression pattern of the angiopoietin-Tie system in ALL and its correlation with baseline characteristics. Blood Res 2021; 56:79-85. [PMID: 34031276 PMCID: PMC8246033 DOI: 10.5045/br.2021.2021024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/26/2021] [Accepted: 04/06/2021] [Indexed: 12/07/2022] Open
Abstract
Background Acute lymphoblastic leukemia (ALL) is the most common type of leukemia in children. Several environmental and genetic factors are known to be involved in its development and progression. The angiopoietin-Tie system is one of the most critical factors in angiogenesis, and its possible role in solid tumors and leukemia has been previously investigated. In this study, we examined the expression of these genes in ALL patients (early pre-B-ALL and pre-B-ALL) and compared them with normal samples. Methods Bone marrow samples were collected from 40 patients (aged 0‒19 yr) newly diagnosed with early pre-B-ALL or pre-B-ALL using molecular and flow cytometric tests and from 15 control individuals. For molecular tests, RNA extraction and cDNA synthesis were performed, and Ang1, Ang2, Ang4, Tie1, and Tie2 gene expression was examined by real-time polymerase chain reaction. Results Ang2, Tie1, and Tie2 gene expression were significantly increased in patients with ALL, whereas Ang1 gene expression was decreased. The Ang4 gene did not show significant expression changes between the two groups. Conclusion Changes in the expression of the Ang-Tie system indicate a possible role of angiogenesis in ALL prognosis. Moreover, such changes can be considered as potential diagnostic biomarkers or therapeutic targets.
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Affiliation(s)
- Saeed Zaka Khosravi
- Immunology Research Center, Tabriz, Iran.,Division of Hematology and Transfusion Medicine, Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Samira Molaei Ramshe
- Student Research Committee, Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Saeed Solali
- Division of Hematology and Transfusion Medicine, Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammadreza Moonesi
- Immunology Research Center, Tabriz, Iran.,Division of Hematology and Transfusion Medicine, Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Majid Farshdousti Hagh
- Immunology Research Center, Tabriz, Iran.,Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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3
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Zhang X, Ishibashi M, Kitatani K, Shigeta S, Tokunaga H, Toyoshima M, Shimada M, Yaegashi N. Potential of Tyrosine Kinase Receptor TIE-1 as Novel Therapeutic Target in High-PI3K-Expressing Ovarian Cancer. Cancers (Basel) 2020; 12:cancers12061705. [PMID: 32604863 PMCID: PMC7352248 DOI: 10.3390/cancers12061705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 06/17/2020] [Accepted: 06/23/2020] [Indexed: 11/16/2022] Open
Abstract
Tyrosine kinase receptor TIE-1 plays a critical role in angiogenesis and blood-vessel stability. In recent years, increased TIE-1 expression has been observed in many types of cancers; however, the biological significance and underlying mechanisms remain unknown. Thus, in the present study, we investigated the tumor biological functions of TIE-1 in ovarian cancer. The treatment of SKOV3 ovarian-cancer cells with siRNA against TIE-1 decreased the expression of key molecules in the PI3K/Akt signaling pathway, such as p110α and phospho-Akt, suggesting that TIE-1 is related to the PI3K/Akt pathway. Furthermore, the knockdown of TIE-1 significantly decreased cell proliferation in high-PI3K-expressing cell lines (SKOV3, CAOV3) but not low-PI3K-expressing cell lines (TOV112D, A2780). These results suggested that inhibition of TIE-1 decreases cell growth in high-PI3K-expressing cells. Moreover, in low-PI3K-expressing TOV112D ovarian-cancer cells, TIE-1 overexpression induced PI3K upregulation and promoted a PI3K-mediated cell proliferative phenotype. Mechanistically, TIE-1 participates in cell growth and proliferation by regulating the PI3K/Akt signaling pathway. Taken together, our findings strongly implicate TIE-1 as a novel therapeutic target in high-PI3K-expressing ovarian-cancer cells.
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Affiliation(s)
- Xuewei Zhang
- Department of Obstetrics and Gynecology, Tohoku University Graduate School of Medicine, Tohoku University, Sendai 980-8577, Japan; (X.Z.); (S.S.); (H.T.); (M.S.); (N.Y.)
| | - Masumi Ishibashi
- Department of Obstetrics and Gynecology, Tohoku University Graduate School of Medicine, Tohoku University, Sendai 980-8577, Japan; (X.Z.); (S.S.); (H.T.); (M.S.); (N.Y.)
- Cancer Science Institute of Singapore, National University of Singapore, Singapore 119077, Singapore
- Correspondence: ; Tel.: +81-022-717-7251; Fax: +81-022-717-7258
| | - Kazuyuki Kitatani
- Laboratory of Immunopharmacology, Faculty of Pharmaceutical Sciences, Setsunan University, Hirakata, Osaka 572-8508, Japan;
| | - Shogo Shigeta
- Department of Obstetrics and Gynecology, Tohoku University Graduate School of Medicine, Tohoku University, Sendai 980-8577, Japan; (X.Z.); (S.S.); (H.T.); (M.S.); (N.Y.)
| | - Hideki Tokunaga
- Department of Obstetrics and Gynecology, Tohoku University Graduate School of Medicine, Tohoku University, Sendai 980-8577, Japan; (X.Z.); (S.S.); (H.T.); (M.S.); (N.Y.)
| | - Masafumi Toyoshima
- Department of Obstetrics and Gynecology, Japanese Red Cross Ishinomaki Hospital, Ishinomaki 986-8522, Japan;
| | - Muneaki Shimada
- Department of Obstetrics and Gynecology, Tohoku University Graduate School of Medicine, Tohoku University, Sendai 980-8577, Japan; (X.Z.); (S.S.); (H.T.); (M.S.); (N.Y.)
| | - Nobuo Yaegashi
- Department of Obstetrics and Gynecology, Tohoku University Graduate School of Medicine, Tohoku University, Sendai 980-8577, Japan; (X.Z.); (S.S.); (H.T.); (M.S.); (N.Y.)
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Yang P, Chen N, Jia JH, Gao XJ, Li SH, Cai J, Wang Z. Tie-1: A potential target for anti-angiogenesis therapy. ACTA ACUST UNITED AC 2015; 35:615-622. [PMID: 26489611 DOI: 10.1007/s11596-015-1479-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Revised: 06/19/2015] [Indexed: 01/30/2023]
Abstract
The tyrosine kinase system angiopoietin (Ang)/Tie interacts with vascular endothelial growth factor pathway and regulates vessel quiescence in adults as well as later steps of the angiogenic cascade related to vessel maturation. Since all Angs are able to bind to Tie-2 but none binds to Tie-1, the function of Tie-2 and its ligands have captured attention. However, emerging evidence indicates unique roles of the orphan receptor Tie-1 in angiogenesis under physiological and pathological conditions. It is required for maintaining vascular endothelial cell integrity and survival during murine embryo development and in adult and may be involved in modulating differentiation of hematopoietic cells in adult. Tie-1 exhibits poor tyrosine kinase activity and signals via forming heterodimers with Tie-2, inhibiting Tie-2 signaling mediated by Angs. This inhibition can be relieved by Tie-1 ectodomain cleavage mediated by tumor- and inflammatory-related factors, which causes destabilization of vessels and initiates vessel remodeling. Up-regulated Tie-1 expression has been found not only in some leukemia cells and tumor related endothelial cells but also in cytoplasm of carcinoma cells of a variety of human solid tumors, which is associated with tumor progression. In addition, it has pro-inflammatory functions in endothelial cells and is involved in some inflammatory diseases associated with angiogenesis. Recent research indicated that Tie-1 gene ablation exhibited significant effects on tumor blood- and lymph-angiogenesis and improved anti-Ang therapy, suggesting Tie-1 may be a potential target for tumor anti-angiogenesis treatment.
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MESH Headings
- Angiogenesis Inhibitors/therapeutic use
- Angiopoietins/genetics
- Angiopoietins/metabolism
- Animals
- Embryo, Mammalian
- Embryonic Development/genetics
- Endothelial Cells/drug effects
- Endothelial Cells/metabolism
- Endothelial Cells/pathology
- Gene Expression Regulation, Developmental
- Gene Expression Regulation, Neoplastic
- Humans
- Mice
- Neoplasms/drug therapy
- Neoplasms/genetics
- Neoplasms/metabolism
- Neoplasms/pathology
- Neovascularization, Pathologic/drug therapy
- Neovascularization, Pathologic/genetics
- Neovascularization, Pathologic/metabolism
- Neovascularization, Pathologic/pathology
- Protein Binding
- Receptor, TIE-1/antagonists & inhibitors
- Receptor, TIE-1/genetics
- Receptor, TIE-1/metabolism
- Receptor, TIE-2/genetics
- Receptor, TIE-2/metabolism
- Signal Transduction
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Affiliation(s)
- Ping Yang
- Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
- Department of Obstetrics and Gynecology, First Affiliated Hospital, School of Medicine, Shihezi University, Shihezi, 832008, China
| | - Na Chen
- Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Jing-Hui Jia
- Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Xue-Jiao Gao
- Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Shi-Han Li
- Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Jing Cai
- Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
| | - Zehua Wang
- Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
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Celton M, Forest A, Gosse G, Lemieux S, Hebert J, Sauvageau G, Wilhelm BT. Epigenetic regulation of GATA2 and its impact on normal karyotype acute myeloid leukemia. Leukemia 2014; 28:1617-26. [PMID: 24514424 DOI: 10.1038/leu.2014.67] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Revised: 01/29/2014] [Accepted: 02/03/2014] [Indexed: 12/23/2022]
Abstract
The GATA2 gene encodes a zinc-finger transcription factor that acts as a master regulator of normal hematopoiesis. Mutations in GATA2 have been implicated in the development of myelodysplastic syndrome and acute myeloid leukemia (AML). Using RNA sequencing we now report that GATA2 is either mutated with a functional consequence, or expressed at low levels in the majority of normal karyotype AML (NK-AML). We also show that low-GATA2-expressing specimens (GATA2(low)) exhibit allele-specific expression (ASE) (skewing) in more than half of AML patients examined. We demonstrate that the hypermethylation of the silenced allele can be reversed by exposure to demethylating agents, which also restores biallelic expression of GATA2. We show that GATA2(low) AML lack the prototypical R882 mutation in DNMT3A frequently observed in NK-AML patients and that The Cancer Genome Atlas AML specimens with DNMT3A R882 mutations are characterized by CpG hypomethylation of GATA2. Finally, we validate that several known missense single-nucleotide polymorphisms in GATA2 are actually loss-of-function variants, which, when combined with ASE, represent the equivalent of homozygous GATA2 mutations. From a broader perspective, this work suggests for the first time that determinants of ASE likely have a key role in human leukemia.
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Affiliation(s)
- M Celton
- 1] Department of Medicine, Institute for Research in Immunology and Cancer, Université de Montreal, Montreal, Québec, Canada [2] Laboratory for high-throughput genomics, Montreal, Québec, Canada [3] INRA, UMR1083, Sciences Pour l'Oenologie, Montpellier, France
| | - A Forest
- 1] Department of Medicine, Institute for Research in Immunology and Cancer, Université de Montreal, Montreal, Québec, Canada [2] Laboratory for high-throughput genomics, Montreal, Québec, Canada
| | - G Gosse
- 1] Department of Medicine, Institute for Research in Immunology and Cancer, Université de Montreal, Montreal, Québec, Canada [2] Laboratory for high-throughput genomics, Montreal, Québec, Canada
| | - S Lemieux
- 1] Department of Medicine, Institute for Research in Immunology and Cancer, Université de Montreal, Montreal, Québec, Canada [2] Laboratory for Functional and Structural Bioinformatics, Montreal, Québec, Canada
| | - J Hebert
- 1] Department of Medicine, Institute for Research in Immunology and Cancer, Université de Montreal, Montreal, Québec, Canada [2] Leukemia Cell Bank of Quebec and Division of Hematology, Maisonneuve-Rosemont Hospital, Montreal, Québec, Canada
| | - G Sauvageau
- 1] Department of Medicine, Institute for Research in Immunology and Cancer, Université de Montreal, Montreal, Québec, Canada [2] Leukemia Cell Bank of Quebec and Division of Hematology, Maisonneuve-Rosemont Hospital, Montreal, Québec, Canada [3] Laboratory for Molecular Genetics of Stem Cells, Montreal, Québec, Canada
| | - B T Wilhelm
- 1] Department of Medicine, Institute for Research in Immunology and Cancer, Université de Montreal, Montreal, Québec, Canada [2] Laboratory for high-throughput genomics, Montreal, Québec, Canada
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Kivivuori SM, Siitonen S, Porkka K, Vettenranta K, Alitalo R, Saarinen-Pihkala U. Expression of vascular endothelial growth factor receptor 3 and Tie1 tyrosine kinase receptor on acute leukemia cells. Pediatr Blood Cancer 2007; 48:387-92. [PMID: 16685739 DOI: 10.1002/pbc.20857] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
BACKGROUND Recent data indicate a role for angiogenesis in hematologic malignancies. In addition to promoting new vessel growth in the bone marrow microenvironment, angiogenic factors are regulators of both hematopoietic and leukemic cells. Activation of vascular endothelial growth factor receptor 3 (VEGFR-3) and Tie1 tyrosine kinase receptor are known to promote leukemia cell survival. The details of this complex angiogenesis-related interaction are still uncertain. PROCEDURE We studied bone marrow samples from 73 patients with acute lymphoblastic (ALL) or myelogenous (AML) leukemia by using immunological methods. RESULTS Vascular endothelial growth factor receptor 3 expression was found in 15% of the samples, particularly in samples with pediatric lymphoblastic leukemias and monocytic AMLs. Tie1 protein expression was found in 11% of the samples, all of which were from adult AML patients. CONCLUSIONS Our findings suggest that there are angiogenesis-related differences between pediatric and adult lymphoblastic leukemias as well as between lymphoid and myeloid leukemias.
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MESH Headings
- AC133 Antigen
- Acute Disease
- Adolescent
- Adult
- Age Factors
- Antigens, CD/analysis
- Antigens, CD34/analysis
- Bone Marrow/pathology
- Child
- Child, Preschool
- Female
- Glycoproteins/analysis
- Hematopoietic Stem Cells/enzymology
- Humans
- Immunophenotyping
- Infant
- Leukemia, Monocytic, Acute/enzymology
- Leukemia, Monocytic, Acute/pathology
- Leukemia, Myeloid/enzymology
- Leukemia, Myeloid/pathology
- Male
- Neoplastic Stem Cells/enzymology
- Neovascularization, Pathologic/enzymology
- Neovascularization, Pathologic/pathology
- Peptides/analysis
- Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/enzymology
- Precursor B-Cell Lymphoblastic Leukemia-Lymphoma/pathology
- Receptor, TIE-1/analysis
- Vascular Endothelial Growth Factor Receptor-3/analysis
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Toren A, Bielorai B, Jacob-Hirsch J, Fisher T, Kreiser D, Moran O, Zeligson S, Givol D, Yitzhaky A, Itskovitz-Eldor J, Kventsel I, Rosenthal E, Amariglio N, Rechavi G. CD133-positive hematopoietic stem cell "stemness" genes contain many genes mutated or abnormally expressed in leukemia. Stem Cells 2006; 23:1142-53. [PMID: 16140871 DOI: 10.1634/stemcells.2004-0317] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Affymetrix human Hu133A oligonucleotide arrays were used to study the expression profile of CD133+ cord blood (CB) and peripheral blood (PB) using CD133 cell-surface marker. An unsupervised hierarchical clustering of 14,025 valid probe sets showed a clear distinction between the CD133+ cells representing the hematopoietic stem cell (HSC) population and CD133-differentiated cells. Two hundred forty-four genes were found to be upregulated by at least twofold in the CD133-positive cells of both CB and PB compared with the CD133-negative cells. These genes represent the hematopoietic "stemness," whereas the 218 and 304 upregulated genes exclusively in PB and CB, respectively, represent tissue specificity. Some of the stemness genes were also common to HSC genes found to be upregulated in several recently published studies. Among these common stemness genes, we identified several groups of genes that have an important role in hematopoiesis: growth factor receptors, transcription factors, genes that have an important role in development, and genes involved in cell growth. Sixteen selected stemness genes are known to be mutated or abnormally regulated in acute leukemias. It can be suggested that key hematopoietic stemness machinery genes may lead to abnormal proliferation and leukemia upon mutation or change of their expression.
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Affiliation(s)
- Amos Toren
- Department of Pediatric Hematology-Oncology, Sheba Medical Center,
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8
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Lundberg LG, Hellström-Lindberg E, Kanter-Lewensohn L, Lerner R, Palmblad J. Angiogenesis in relation to clinical stage, apoptosis and prognostic score in myelodysplastic syndromes. Leuk Res 2006; 30:247-53. [PMID: 16099505 DOI: 10.1016/j.leukres.2005.07.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2005] [Accepted: 07/06/2005] [Indexed: 11/21/2022]
Abstract
The International Prognostic Scoring System (IPSS), based on the number of cytopenias, percentage of bone marrow blasts and cytogenetics, is an important prognostic tool for patients with myelodysplastic syndrome (MDS). In addition, factors such as high bone marrow cellularity and lactate dehydrogenase levels have been associated with an adverse outcome, spontaneously and after chemotherapy. Recently, increased bone marrow angiogenesis, measured as, e.g. microvascular density (MVD), was reported to be more intense in high-risk than in low-risk MDS. To assess the prognostic role of MVD in MDS, a cohort of 56 patients, thoroughly investigated for various clinical and morphological parameters, were followed-up for survival > or =60 months after the diagnostic analysis. As a group MDS patients had higher MVD compared to healthy controls (p<0.02). The highest median MVD value was observed in the RAEB group, but there was no overall significant difference between the FAB groups. No significant correlations were observed between MVD and peripheral blood counts, bone marrow cellularity, percentage of bone marrow blasts and CD34 positive cells, apoptotic index (TUNEL), proliferation index (MIB-1), erythroid index, FAB group and IPSS score. MVD was not correlated to overall survival. In contrast, bone marrow blast count <5%, low or normal cellularity, as well as a high erythroid index, indicated a favorable survival. Thus, our data do not support an important prognostic role of angiogenesis, reflected by microvessel density, in the myelodysplastic syndromes.
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Affiliation(s)
- Lars Göran Lundberg
- Department of Medicine, Stockholm Söder Hospital, The Karolinska Institutet, SE-141 86 Stockholm, Sweden
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Abstract
Haematopoiesis is controlled by a number of growth factors and cytokines, a number of which act through binding to high-affinity receptor tyrosine kinases (RTKs). Approximately 20 different RTK classes have been identified, all of which share a similar structure that includes a ligand binding extracellular domain, a single transmembrane domain and an intracellular tyrosine kinase domain. Recent studies have linked an increasing number of mutations in the RTKs to the pathogenesis of both acute and chronic leukaemia. For example, the FLT3 receptor, a RTK class III, is the most commonly mutated gene in acute myeloid leukaemia, while c-kit mutations are strongly linked to the development of mast cell malignancy. This review summarizes the RTK classes that are known to be expressed on normal haematopoietic tissue and highlights the many 'gain-of-function' mutations involved in leukaemogenesis. It is to be hoped that this knowledge will provide important new insights for targeted therapy in leukaemia.
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10
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Erkeland SJ, Valkhof M, Heijmans-Antonissen C, van Hoven-Beijen A, Delwel R, Hermans MHA, Touw IP. Large-scale identification of disease genes involved in acute myeloid leukemia. J Virol 2004; 78:1971-80. [PMID: 14747562 PMCID: PMC369447 DOI: 10.1128/jvi.78.4.1971-1980.2004] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2003] [Accepted: 10/27/2003] [Indexed: 11/20/2022] Open
Abstract
Acute myeloid leukemia (AML) is a heterogeneous group of diseases in which chromosomal aberrations, small insertions or deletions, or point mutations in certain genes have profound consequences for prognosis. However, the majority of AML patients present without currently known genetic defects. Retroviral insertion mutagenesis in mice has become a powerful tool for identifying new disease genes involved in the pathogenesis of leukemia and lymphoma. Here we have used the Graffi-1.4 strain of murine leukemia virus, which causes predominantly AML, in a screen to identify novel genes involved in the pathogenesis of this disease. We report 79 candidate disease genes in common integration sites (CISs) and 15 genes whose family members previously were found to be affected in other studies. The majority of the identified sequences (60%) were not found in lymphomas and monocytic leukemias in previous screens, suggesting a specific involvement in AML. Although most of the virus integrations occurred in or near the 5' or 3' ends of the genes, suggesting deregulation of gene expression as a consequence of virus integration, 18 CISs were located exclusively within the genes, conceivably causing gene disruption.
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Affiliation(s)
- Stefan J Erkeland
- Department of Hematology, Erasmus Medical Center, Rotterdam, The Netherlands
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