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Cousin E, Oger E, Dalle JH, Bertrand Y, Pertuisel S, Pochon C, Galambrun C, Simon P, Bruno B, Paillard C, Schneider P, Rohrlich P, de La Tour RP, Freycon C, Eliaou JF, Semana G, Jonveaux P, Drunat S, Bordigoni P, Gandemer V. Assessment of chimerism and immunomodulation to prevent post-transplantation relapse in childhood acute myeloblastic leukemia: is it the right approach? Pediatr Hematol Oncol 2020; 37:259-268. [PMID: 32028812 DOI: 10.1080/08880018.2020.1717697] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Relapse of acute myeloblastic leukemia (AML) after first allogenic hematopoietic stem-cell transplantation (allo-HSCT) is a fatal complication. Sixty-five children transplanted for AML were included in a prospective national study from June 2005 to July 2008 to explore the feasibility of preemptive immune modulation based on the monitoring of blood chimerism. Relapse occurred in 23 patients (35%). The median time between the last complete chimerism and relapse was 13.5 days (2-138). Prompt discontinuation of cyclosporin and the administration of donor lymphocyte infusions (DLIs) based on chimerism monitoring failed as a preemptive tool, either for detecting relapse or certifying long-term remission.
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Affiliation(s)
- Elie Cousin
- Department of Pediatric Hematology/Oncology, Rennes University Hospital, Rennes, France
| | - Emmanuel Oger
- Clinical Pharmacology Department, Pharmacoepidemiology Team, Rennes University Hospital, Rennes, France
| | - Jean-Hugues Dalle
- Department of Pediatric Hematology, Robert Debré University Hospital, Paris, France
| | - Yves Bertrand
- Department of Pediatric Hematology, Lyon University Hospital, Lyon, France
| | - Sophie Pertuisel
- Department of Pediatric Hematology/Oncology, Rennes University Hospital, Rennes, France
| | - Cecile Pochon
- Department of Pediatric Hematology/Oncology, Nancy University Hospital, Nancy, France
| | - Claire Galambrun
- Department of Pediatric Hematology, La Timone University Hospital, Marseille, France
| | - Pauline Simon
- Department of Pediatric Hematology/Oncology, Besançon University Hospital, Besançon, France
| | - Benedicte Bruno
- Department of Pediatric Hematology/Oncology, Jeanne de Flandre University Hospital, Lille, France
| | - Catherine Paillard
- Department of Pediatric Hematology/Oncology, Hautepierre University Hospital, Strasbourg, France
| | - Pascale Schneider
- Department of Pediatric Hematology, Rouen University Hospital, Rouen, France
| | - Pierre Rohrlich
- Department of Pediatric Hematology/Oncology, Archet II University Hospital, Nice, France
| | | | - Claire Freycon
- Department of Pediatric Hematology/Oncology, La Tronche University Hospital, Grenoble, France
| | | | - Gilbert Semana
- Laboratory of Immunology, French Blood Transfusion Center, Rennes, France
| | | | - Severine Drunat
- Department of Genetics, University Hospital of Robert Debre and Paris-Diderot University, Paris, France
| | - Pierre Bordigoni
- Department of Pediatric Hematology/Oncology, Nancy University Hospital, Nancy, France
| | - Virginie Gandemer
- Department of Pediatric Hematology/Oncology, Rennes University Hospital, Rennes, France
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2
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Zhou GB, Chen SJ, Chen Z. Acute promyelocytic leukemia: A model of molecular target based therapy. Hematology 2013; 10 Suppl 1:270-80. [PMID: 16188687 DOI: 10.1080/10245330512331390519] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Leukemia, a group of hematological malignancies characterized by clonal expansion of hematopoietic cells with uncontrolled proliferation, decreased apoptosis and blocked differentiation, is one of the most notorious enemies of mankind which accounts for some 300,000 new cases and 222,000 deaths each year worldwide. Leukemia can be divided into acute or chronic, lymphoid or myeloid types, based on the disease progression and hematopoietic lineages involved 5. The responses of leukemia to therapies differ from one type or subtype to another. Hence, to improve the clinical outcome, the therapeutic strategies should be disease pathogenesis-based and individualized. The close collaboration between bench and bedside may not only shed new lights on leukemogenesis, gain insights into therapeutic mechanisms, but also provide opportunities for designing more rational therapies. The development of curative approaches for acute promyelocytic leukemia (APL) may serve as a paradigm.
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Affiliation(s)
- Guang-Biao Zhou
- Shanghai Institute of Hematology, Rui Jin Hospital Affiliated to Shanghai Second Medical University 197, Rui Jin Road II, Shanghai, 200025, China
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3
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Braoudaki M, Tzortzatou-Stathopoulou F. Clinical Cytogenetics in Pediatric Acute Leukemia: An Update. CLINICAL LYMPHOMA MYELOMA & LEUKEMIA 2012; 12:230-7. [DOI: 10.1016/j.clml.2012.04.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2011] [Revised: 12/25/2011] [Accepted: 04/13/2012] [Indexed: 12/28/2022]
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4
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Pyatt D, Hays S. A review of the potential association between childhood leukemia and benzene. Chem Biol Interact 2010; 184:151-64. [PMID: 20067778 DOI: 10.1016/j.cbi.2010.01.002] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2009] [Revised: 12/24/2009] [Accepted: 01/04/2010] [Indexed: 10/20/2022]
Abstract
Chronic exposure to high concentrations of benzene is an established cause of acute myeloid leukemia (AML) in occupationally exposed workers. Based on this association, it is not unreasonable to assume that children could also get AML if they were exposed to comparable levels of benzene. Fortunately, reports of such exposures and subsequent AML development in children are non-existent. However, the question of whether children can develop leukemia at far lower, environmental levels of benzene remains. The existing scientific evidence relevant to this question will be addressed in this review. While positive findings have been reported, the collective literature does not indicate that exposure to environmental levels of benzene is related to an increased risk of childhood leukemia. Our understanding of this important issue would be strengthened by additional studies that accurately characterize exposures as well as differentiate between the various forms of leukemias observed in children.
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Affiliation(s)
- David Pyatt
- Summit Toxicology, LLP, United States, University of Colorado, Schools of Public Health and Pharmacy, United States.
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5
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6
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Zhou GB, Li G, Chen SJ, Chen Z. From dissection of disease pathogenesis to elucidation of mechanisms of targeted therapies: leukemia research in the genomic era. Acta Pharmacol Sin 2007; 28:1434-49. [PMID: 17723177 DOI: 10.1111/j.1745-7254.2007.00684.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Leukemia is a group of heterozygous diseases of hematopoietic stem/progenitor cells that involves dynamic change in the genome. Dissection of genetic abnormalities critical to leukemia initiation provides insights into the elusive leukemogenesis, identifies distinct subsets of leukemia and predicts prognosis individually, and can also provide rational therapeutic targets for curative approaches. The past three decades have seen tremendous advances in the analysis of genotype-phenotype connection of leukemia, and in the identification of molecular biomarkers for leukemia subtypes. Intriguingly, differentiation therapy, targeted therapy and chemotherapy have turned several subtypes of leukemia from highly fatal to highly curable. The use of all-trans retinoic acid and arsenic trioxide, which trigger degradation of PML-RARalpha, the causative fusion protein generated by t (15;17) translocation in acute promyelocytic leukemia (APL), has led to a dramatic improvement of APL clinical outcome. Imatinib mesylate/ Gleevec/STI571, which inhibits the tyrosine kinase activity of BCR-ABL oncoprotein, has now become the new gold standard for the treatment of chronic myeloid leukemia. Optimal use of chemotherapeutic agents together with a stringent application of prognostic factors for risk-directed therapy in clinical trials has resulted in a steady improvement in the treatment outcome of acute lymphoblastic leukemia. Hence, the pace of progress extrapolates to a prediction of leukemia control in the twenty-first century.
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Affiliation(s)
- Guang-biao Zhou
- State Key Laboratory of Medical Genomics and Shanghai Institute of Hematology, Rui Jin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
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7
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Chen CC, Gau JP, Yu YB, Lu CH, Lee KD, You JY. Prognosis and treatment outcome in patients with acute myeloid leukemia with t(8;21)(q22;q22). Adv Ther 2007; 24:907-20. [PMID: 17901040 DOI: 10.1007/bf02849984] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Patients with acute myeloid leukemia (AML) with the t(8;21) karyotype generally have a favorable clinical course, but key prognostic factors remain poorly defined. This study was conducted to determine the prognoses and treatment outcomes of patients with AML with this unique cytogenetic change. A total of 22 patients with AML with t(8;21)(q22;q22) were studied. Various parameters were tested for their impact on disease-free survival (DFS) and overall survival (OS). Another 55 patients with AML with a normal karyotype were included for comparison of clinical outcomes. Between patients with t(8-21) and those with a normal karyotype, no significant differences were noted in DFS (median survival, 15.23 vs 12.03 mo; P=.7626) and OS (median survival, 19.17 vs 18.93 mo; P=.7543). Among t(8;21)(q22;q22) patients, no clinical parameters showed a significant impact on DFS. Univariate analysis revealed that a higher platelet count (>15.10(9)/L) at diagnosis, a low white blood cell count (index < or =20), and hematopoietic stem cell transplantation (HSCT) as postremission therapy were associated with improved OS. On multivariate analysis, HSCT as postremission therapy and white blood cell count index <20 remained good independent prognostic factors for OS. The data presented here suggest that t(8;21)(q22;q22) cytogenetic changes in patients with AML had prognostic significance similar to that in patients with a normal karyotype; patients who harbored either karyotype had parallel clinical outcomes. It is concluded that patients with AML with t(8;21)(q22;q22) would be compromised by treatment approaches that do not include HSCT as postremission therapy.
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MESH Headings
- Adult
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Chromosomes, Human, Pair 21
- Chromosomes, Human, Pair 8
- Disease-Free Survival
- Female
- Hematologic Tests
- Hematopoietic Stem Cell Transplantation
- Humans
- Karyotyping
- Leukemia, Myeloid, Acute/diagnosis
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/therapy
- Male
- Middle Aged
- Prognosis
- Translocation, Genetic
- Treatment Outcome
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Affiliation(s)
- Chih-Cheng Chen
- Department of Medicine, Division of Hematology/Oncology, Chang Gung Memorial Hospital-Chiayi, Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan
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8
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Hmidi K, Zaouali S, Messaoud R, Mahjoub B, Ammari W, Bacha L, Laatiri A, Jenzeri S, Khairallah M. Bilateral orbital myeloid sarcoma as initial manifestation of acute myeloid leukemia. Int Ophthalmol 2007; 27:373-7. [PMID: 17522781 DOI: 10.1007/s10792-007-9088-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2006] [Accepted: 03/28/2007] [Indexed: 11/25/2022]
Abstract
BACKGROUND Granulocytic sarcoma is a rare orbital complication of acute leukemia. It concerns primarily children under 10 years of age suffering from primitive acute myeloid leukemia. The diagnosis is made by clinical examination, computed tomography and confirmed by haematological investigations. The treatment approach is based on chemotherapy associated with intravenous steroid therapy. CASE REPORT We report the case of a 6-year-old girl who presented with bilateral proptosis revealing acute myeloid leukemia. The patient was treated by a combination of chemotherapeutic drugs in two phases, associated with intravenous steroids. After a follow-up period of 24 months, the patient was in complete remission. CONCLUSION The diagnosis of granulocytic sarcoma should be considered in any orbital mass of uncertain origin, particularly if it is bilateral. Special stains and immunohistochemistry play an important role in the diagnosis.
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MESH Headings
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Child
- Drug Therapy, Combination
- Exophthalmos/etiology
- Female
- Glucocorticoids/therapeutic use
- Humans
- Leukemia, Myeloid, Acute/complications
- Leukemia, Myeloid, Acute/diagnosis
- Leukemia, Myeloid, Acute/drug therapy
- Orbital Neoplasms/diagnosis
- Orbital Neoplasms/drug therapy
- Orbital Neoplasms/etiology
- Sarcoma, Myeloid/diagnosis
- Sarcoma, Myeloid/drug therapy
- Sarcoma, Myeloid/etiology
- Tomography, X-Ray Computed
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Affiliation(s)
- Kamel Hmidi
- Department of Ophthalmology, Tahar Sfar University Hospital, Mahdia, Tunisia
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9
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Zhou GB, Kang H, Wang L, Gao L, Liu P, Xie J, Zhang FX, Weng XQ, Shen ZX, Chen J, Gu LJ, Yan M, Zhang DE, Chen SJ, Wang ZY, Chen Z. Oridonin, a diterpenoid extracted from medicinal herbs, targets AML1-ETO fusion protein and shows potent antitumor activity with low adverse effects on t(8;21) leukemia in vitro and in vivo. Blood 2007; 109:3441-50. [PMID: 17197433 PMCID: PMC1852250 DOI: 10.1182/blood-2006-06-032250] [Citation(s) in RCA: 173] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2006] [Accepted: 12/04/2006] [Indexed: 12/22/2022] Open
Abstract
Studies have documented the potential antitumor activities of oridonin, a compound extracted from medicinal herbs. However, whether oridonin can be used in the selected setting of hematology/oncology remains obscure. Here, we reported that oridonin induced apoptosis of t(8;21) acute myeloid leukemic (AML) cells. Intriguingly, the t(8;21) product AML1-ETO (AE) fusion protein, which plays a critical role in leukemogenesis, was degraded with generation of a catabolic fragment, while the expression pattern of AE target genes investigated could be reprogrammed. The ectopic expression of AE enhanced the apoptotic effect of oridonin in U937 cells. Preincubation with caspase inhibitors blocked oridonin-triggered cleavage of AE, while substitution of Ala for Asp at residues 188 in ETO moiety of the fusion abrogated AE degradation. Furthermore, oridonin prolonged lifespan of C57 mice bearing truncated AE-expressing leukemic cells without suppression of bone marrow or reduction of body weight of animals, and exerted synergic effects while combined with cytosine arabinoside. Oridonin also inhibited tumor growth in nude mice inoculated with t(8;21)-harboring Kasumi-1 cells. These results suggest that oridonin may be a potential antileukemia agent that targets AE oncoprotein at residue D188 with low adverse effect, and may be helpful for the treatment of patients with t(8;21) AML.
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MESH Headings
- Animals
- Antineoplastic Agents/pharmacology
- Apoptosis/drug effects
- Chromosomes, Human, Pair 21/genetics
- Chromosomes, Human, Pair 8/genetics
- Core Binding Factor Alpha 2 Subunit/antagonists & inhibitors
- Core Binding Factor Alpha 2 Subunit/metabolism
- Cytarabine/agonists
- Cytarabine/pharmacology
- Diterpenes/agonists
- Diterpenes/chemistry
- Diterpenes/pharmacology
- Diterpenes, Kaurane/agonists
- Diterpenes, Kaurane/chemistry
- Diterpenes, Kaurane/pharmacology
- Drug Screening Assays, Antitumor
- Drug Synergism
- Humans
- Leukemia, Myeloid, Acute/drug therapy
- Leukemia, Myeloid, Acute/metabolism
- Leukemia, Myeloid, Acute/pathology
- Mice
- Mice, Nude
- Neoplasms, Experimental/drug therapy
- Neoplasms, Experimental/metabolism
- Neoplasms, Experimental/pathology
- Oncogene Proteins, Fusion/antagonists & inhibitors
- Oncogene Proteins, Fusion/metabolism
- Plant Extracts/agonists
- Plant Extracts/chemistry
- Plant Extracts/pharmacology
- Plants, Medicinal/chemistry
- RUNX1 Translocation Partner 1 Protein
- Translocation, Genetic
- U937 Cells
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Affiliation(s)
- Guang-Biao Zhou
- State Key Laboratory of Medical Genomics and Shanghai Institute of Hematology, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin Road II, Shanghai 200025, China.
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10
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Schaich M, Koch R, Soucek S, Repp R, Ehninger G, Illmer T. A sensitive model for prediction of relapse in adult acute myeloid leukaemia with t(8;21) using white blood cell count, CD56 and MDR1 gene expression at diagnosis. Br J Haematol 2004; 125:477-9. [PMID: 15142118 DOI: 10.1111/j.1365-2141.2004.04939.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Acute myeloid leukaemia (AML) carrying t(8;21) has an overall favourable prognosis. However, relapse occurs and the impact of multidrug resistance gene (MDR1) expression on recurring disease in this group of patients is not known. We determined quantifiable MDR1 expression in the bone marrow of 28 AML patients with t(8;21) by a validated real-time polymerase chain reaction assay. Using MDR1 expression, white blood cell count and CD56 expression at diagnosis we observed complete concordance of predicted and observed relapses. A calculated logit out of these three variables was a strong independent prognostic factor for overall (P = 0.007) and disease-free survival (P = 0.002).
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Affiliation(s)
- Markus Schaich
- Department of Medicine I, University Hospital C.G. Carus, Dresden, Germany.
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11
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Knoll JHM, Rogan PK. Sequence-based, in situ detection of chromosomal abnormalities at high resolution. Am J Med Genet A 2003; 121A:245-57. [PMID: 12923866 DOI: 10.1002/ajmg.a.20123] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
We developed single copy probes from the draft genome sequence for fluorescence in situ hybridization (scFISH) which precisely delineate chromosome abnormalities at a resolution equivalent to genomic Southern analysis. This study illustrates how scFISH probes detect cryptic and subtle abnormalities and localize the sites of chromosome rearrangements. scFISH probes are substantially shorter than conventional recombinant DNA-derived probes, and C(o)t1 DNA is not required to suppress repetitive sequence hybridization. In this study, 74 single copy sequence probes (>1,500 bp) have been developed from >/=100 kb genomic intervals associated with either constitutional or acquired disorders. Applications of these probes include detection of congenital microdeletion syndromes on chromosomes 1, 4, 7, 15, 17, 22 and submicroscopic deletions involving the imprinting center on chromosome 15q11.2q13. We demonstrate how hybridization with multiple combinations of probes derived from the Smith-Magenis syndrome interval on chromosome 17 identified a patient with an atypical, proximal deletion breakpoint. A similar multi-probe hybridization strategy has also been used to delineate the translocation breakpoint region on chromosome 9 in chronic myelogenous leukemia. Probes have also been designed to hybridize to multiple cis paralogs, both enhancing the chromosomal target size and detecting chromosome rearrangements, for example, by splitting and separating a family of related sequences flanking an inversion breakpoint on chromosome 16 in acute myelogenous leukemia. These novel strategies for rapid and precise characterization of cytogenetic abnormalities are feasible because of the sequence-defined properties and dense euchromatic organization of single copy probes.
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MESH Headings
- Adult
- Blotting, Southern
- Child
- Chromosome Aberrations
- Chromosomes, Human, Pair 15/genetics
- Chromosomes, Human, Pair 16/genetics
- Chromosomes, Human, Pair 17/genetics
- DNA Probes/analysis
- DNA Probes/chemical synthesis
- DNA Probes/isolation & purification
- Gene Deletion
- Gene Dosage
- Genome, Human
- Humans
- In Situ Hybridization, Fluorescence/methods
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Nucleic Acid Hybridization
- Prader-Willi Syndrome/genetics
- Sequence Analysis, DNA/methods
- Translocation, Genetic
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Affiliation(s)
- Joan H M Knoll
- Children's Mercy Hospital and Clinics, University of Missouri-Kansas City School of Medicine, Kansas City, Missouri, USA.
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12
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Casillas JN, Woods WG, Hunger SP, McGavran L, Alonzo TA, Feig SA. Prognostic implications of t(10;11) translocations in childhood acute myelogenous leukemia: a report from the Children's Cancer Group. J Pediatr Hematol Oncol 2003; 25:594-600. [PMID: 12902910 DOI: 10.1097/00043426-200308000-00002] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE This was a retrospective analysis of outcome based on cytogenetics for a Children's Cancer Group phase 3 trial of acute myelogenous leukemia (AML) (CCG-2891). PATIENTS AND METHODS A retrospective analysis of outcome for newly diagnosed children with AML and myelodysplastic syndrome (MDS) was performed using data collected from CCG-2891. The authors identified 11 patients whose blasts carried t(10;11) reciprocal translocations or other complex rearrangements involving 10p and 11q among 470 eligible patients entered with acceptable, centrally reviewed cytogenetics. A bone marrow specimen was used for each case of cytogenetic analysis in which 20 banded (either G-banded or Q-banded) metaphases were completed on each subject. All 11 patients had characteristic monocytoid morphology (M4 or M5) and tended to be young (0.1-7.9 years; median 0.9 years). RESULTS All 11 patients entered remission, but remissions tended to be short; 9 patients relapsed within 12 months (median 4 months). The relapse rate of 82% was significantly higher for this group of patients compared with 46% for the group at large. The relapse rate for this group of patients having t(10;11) reciprocal translocations or other complex rearrangements involving 10p and 11q was also significantly higher compared with subjects with other 11q23 chromosomal abnormalities. The CNS relapse rate of 55% was higher for this group of patients compared with 3% for all other patients in the study. The CNS relapse rate was higher for the subjects who had t(10;11) reciprocal translocations or other complex rearrangements involving 10p and 11q compared with subjects with all other chromosome 11 abnormalities. Three children survived, two in second remissions (4.7 and 6.3 years after relapse) and one in first remission (7.0 years after diagnosis). Survival and event-free survival for the patients with t(10;11) reciprocal translocations or other complex rearrangements involving 10p and 11q was 27 +/- 27% and 9 +/- 17% at 6 years, respectively, and was not statistically different from all other patients with cytogenetics. Similarly, the survival and event-free survival for the patients with t(10;11) translocations and other rearrangements of chromosomes 10 and 11 was 27 +/- 27% and 9 +/- 17% at 6 years, respectively, and was not statistically different from the 11q23 group of subjects. CONCLUSIONS Further research is needed to determine the various changes that are occurring at the molecular level for patients with t(10;11) translocations and other rearrangements of chromosomes 10 and 11 to gain insight into the mechanisms causing this clinical phenotype associated with a poor prognosis.
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MESH Headings
- Child
- Child, Preschool
- Chromosomes, Human, Pair 10/genetics
- Chromosomes, Human, Pair 11/genetics
- Female
- Humans
- Infant
- Karyotyping
- Leukemia, Myeloid, Acute/drug therapy
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/pathology
- Male
- Prognosis
- Randomized Controlled Trials as Topic
- Retrospective Studies
- Survival Analysis
- Translocation, Genetic
- Treatment Outcome
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Affiliation(s)
- Jacqueline N Casillas
- Gwynne Hazen Cherry Memorial Laboratory, Mattel Children's Hospital at UCLA, Los Angeles, California, USA.
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13
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Liang DC, Shih LY, Yang CP, Hung IJ, Chen SH, Liu HC. Molecular analysis of fusion transcripts in childhood acute myeloid leukemia in Taiwan. MEDICAL AND PEDIATRIC ONCOLOGY 2001; 37:555-6. [PMID: 11745899 DOI: 10.1002/mpo.1254] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- D C Liang
- Division of Hematology-Oncology, Department of Pediatrics, Mackay Memorial Hospital, Taipei, Taiwan
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14
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Abstract
Childhood myeloid leukaemias are a diverse collection of conditions. Although many are also seen in adults, some are peculiar to childhood. In childhood AML, as in adults, cytogenetic abnormalities are associated with specific clinical features and define prognostic groups. In infants under 1 year with AML, the incidence of 11q23 abnormalities is particularly high. The finding of identical 11q23 breakpoints in infant leukaemia as in therapy-related leukaemias suggests a role for in utero exposure to topoisomerase II inhibitors. There are a number of constitutional disorders that predispose children to develop AML, usually with a preceding myelodysplastic phase. Monosomy (or deletion of the long arm) of chromosome 7 is the most frequent chromosome abnormality in the bone marrow of such patients. Abnormalities of chromosome 7 are also common cytogenetic findings in all morphological subgroups of childhood myelodysplasia, either as a primary abnormality or associated with disease progression.
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Affiliation(s)
- G W Hall
- Paediatric Haematology/Oncology Unit, John Radcliffe Hospital, Headley Way, Oxford, OX3 9DU, UK
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15
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