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Yang Y, Liu L, Tucker HO. The malignant transformation potential of the oncogene STYK1/NOK at early lymphocyte development in transgenic mice. Biochem Biophys Rep 2024; 38:101709. [PMID: 38638675 PMCID: PMC11024497 DOI: 10.1016/j.bbrep.2024.101709] [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: 01/04/2024] [Revised: 04/01/2024] [Accepted: 04/05/2024] [Indexed: 04/20/2024] Open
Abstract
B-cell Chronic Lymphocytic Leukemia (B-CLL) is a malignancy caused by the clonal expansion of mature B lymphocytes bearing a CD5+CD19+ (B1) phenotype. However, the origin of B-CLL remains controversial. We showed previously that STYK1/NOK transgenic mice develop a CLL-like disease. Using this model system in this study, we attempt to define the stage of CLL initiation. Here, we show that the phenotype of STYK1/NOK-induced B-CLL is heterogeneous. The expanded B1 lymphocyte pool was detected within peripheral lymphoid organs and was frequently associated with the expansions of memory B cells. Despite this immunophenotypic heterogeneity, suppression of B cell development at an early stage consistently occurred within the bone marrow (BM) of STYK1/NOK-tg mice. Overall, we suggest that enforced expression of STYK1/NOK in transgenic mice might significantly predispose BM hematopoietic stem cells (HSCs) towards the development of B-CLL.
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Affiliation(s)
- Yin Yang
- Department of Pathogen Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & School of Basic Medicine, Peking Union Medical College, Beijing, 100005, China
| | - Li Liu
- Department of Pathogen Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & School of Basic Medicine, Peking Union Medical College, Beijing, 100005, China
| | - Haley O. Tucker
- Molecular Biosciences, Institute for Cellular and Molecular Biology, University of Texas at Austin, 1 University Station A5000, Austin, TX, 78712, USA
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2
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Fogarty H, Dowling A, O'Brien D, Langabeer S, Bacon CL, Flavin R, O'Dwyer M, Hennessy B, O'Leary H, Crotty G, Henderson R, Nolan J, Thornton P, Vandenberghe E, Quinn F. Biclonal lymphoproliferative disorders: another association with NOTCH1-mutated chronic lymphocytic leukaemias. Ir J Med Sci 2020; 190:1087-1094. [PMID: 33068240 DOI: 10.1007/s11845-020-02386-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 09/23/2020] [Indexed: 10/23/2022]
Abstract
INTRODUCTION Biclonal lymphoid disorders, when two distinct lymphoproliferative disorders (LPD) co-exist, are rare (incidence of 1.4%) and associated with a poor prognosis. NOTCH1 mutations occur in 10% of CLL at diagnosis, associated with a short disease-free interval and increased risk of Richter's transformation. We hypothesised that the incidence of NOTCH1 mutations in CLL with a second LPD may be increased, because the mutation occurs early in leukaemogenesis, permitting clonal divergence. METHODS We identified 19 patients with biclonal LPD at diagnosis: 11 with CLL and a second LPD (group A) and 8 with a second distinct CLL (group B). NOTCH1 mutation analysis was performed and clinical outcome investigated. RESULTS Ten of 19 (52%) were NOTCH1 mutated: 5 in group A (45%) and 5 in group B (62.5%) with a favourable clinical outcome observed among this cohort with 28.7 (range 1-99) months of follow-up. CONCLUSION In conclusion, we identified a significant (52%) incidence of NOTCH1 mutations in CLL in the context of biclonal LPD, associated with an indolent clinical course.
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Affiliation(s)
- Helen Fogarty
- Department of Cancer Molecular Diagnostics, St. James's Hospital, Dublin, Ireland. .,Department of Haematology, St James's Hospital and Trinity College, Dublin, Ireland. .,Irish Centre for Vascular Biology, Royal College of Surgeons in Ireland, 123 St Stephen's Green, Dublin 2, Ireland.
| | - Anita Dowling
- Department of Cancer Molecular Diagnostics, St. James's Hospital, Dublin, Ireland.,Department of Haematology, St James's Hospital and Trinity College, Dublin, Ireland
| | - David O'Brien
- Department of Haematology, St James's Hospital and Trinity College, Dublin, Ireland
| | - Steve Langabeer
- Department of Cancer Molecular Diagnostics, St. James's Hospital, Dublin, Ireland
| | | | - Richard Flavin
- Department of Pathology, St James's Hospital, Dublin, Ireland
| | | | - Brian Hennessy
- Department of Haematology, Waterford University Hospital, Waterford, Ireland
| | - Hilary O'Leary
- Department of Haematology, Limerick University Hospital, Limerick, Ireland
| | - Gerard Crotty
- Department of Haematology, Midlands Regional Hospital, Tullamore, Ireland
| | - Robert Henderson
- Department of Haematology, Midlands Regional Hospital, Tullamore, Ireland
| | - James Nolan
- Department of Haematology, Limerick University Hospital, Limerick, Ireland
| | | | - Elisabeth Vandenberghe
- Department of Cancer Molecular Diagnostics, St. James's Hospital, Dublin, Ireland.,Department of Haematology, St James's Hospital and Trinity College, Dublin, Ireland
| | - Fiona Quinn
- Department of Cancer Molecular Diagnostics, St. James's Hospital, Dublin, Ireland
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3
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Kriangkum J, Motz SN, Mack T, Beiggi S, Baigorri E, Kuppusamy H, Belch AR, Johnston JB, Pilarski LM. Single-Cell Analysis and Next-Generation Immuno-Sequencing Show That Multiple Clones Persist in Patients with Chronic Lymphocytic Leukemia. PLoS One 2015; 10:e0137232. [PMID: 26353109 PMCID: PMC4564241 DOI: 10.1371/journal.pone.0137232] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 08/14/2015] [Indexed: 12/29/2022] Open
Abstract
The immunoglobulin heavy chain (IGH) gene rearrangement in chronic lymphocytic leukemia (CLL) provides a unique molecular signature; however, we demonstrate that 26/198 CLL patients (13%) had more than one IGH rearrangement, indicating the power of molecular technology over phenotypic analysis. Single-cell PCR analysis and next-generation immuno-sequencing identified IGH-defined clones. In 23% (18/79) of cases whose clones carried unmutated immunoglobulin heavy chain variable (IGHV) genes (U-CLL), IGH rearrangements were bialleic with one productive (P) and one non-productive (NP) allele. Two U-CLL were biclonal, each clone being monoallelic (P). In 119 IGHV-mutated (M-CLL) cases, one had biallelic rearrangements in their CLL (P/NP) and five had 2–4 distinct clones. Allelic exclusion was maintained in all B-clones analyzed. Based on single-cell PCR analysis, 5/11 partner clones (45%) reached levels of >5x109 cells/L, suggesting second CLL clones. Partner clones persisted over years. Conventional IGH characterization and next-generation sequencing of 13 CLL, 3 multiple myeloma, 2 Waldenstrom’s macroglobulinemia and 3 age-matched healthy donors consistently identified the same rearranged IGH sequences. Most multiple clones occurred in M-CLL, perhaps indicative of weak clonal dominance, thereby associating with a good prognosis. In contrast, biallelic CLL occurred primarily in U-CLL thus being associated with poor prognosis. Extending beyond intra-clonal diversity, molecular analysis of clonal evolution and apparent subclones in CLL may also reflect inter-clonal diversity.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- B-Lymphocytes/immunology
- Clone Cells/immunology
- Female
- Gene Rearrangement, B-Lymphocyte, Heavy Chain/genetics
- Gene Rearrangement, B-Lymphocyte, Heavy Chain/immunology
- Humans
- Immunoglobulin Heavy Chains/genetics
- Immunoglobulin Heavy Chains/immunology
- Immunoglobulin Variable Region/genetics
- Immunoglobulin Variable Region/immunology
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/immunology
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Male
- Middle Aged
- Prognosis
- Single-Cell Analysis
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Affiliation(s)
- Jitra Kriangkum
- Department of Oncology, University of Alberta and Cross Cancer Institute, Edmonton, Canada
| | - Sarah N. Motz
- Department of Oncology, University of Alberta and Cross Cancer Institute, Edmonton, Canada
| | - Tanner Mack
- Department of Oncology, University of Alberta and Cross Cancer Institute, Edmonton, Canada
| | - Sara Beiggi
- Manitoba Institute of Cell Biology, Winnipeg, Canada
| | - Eva Baigorri
- Department of Oncology, University of Alberta and Cross Cancer Institute, Edmonton, Canada
| | - Hemalatha Kuppusamy
- Department of Oncology, University of Alberta and Cross Cancer Institute, Edmonton, Canada
| | - Andrew R. Belch
- Department of Oncology, University of Alberta and Cross Cancer Institute, Edmonton, Canada
| | | | - Linda M. Pilarski
- Department of Oncology, University of Alberta and Cross Cancer Institute, Edmonton, Canada
- * E-mail:
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4
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Cai Z, Yan LJ, Ratka A. Telomere Shortening and Alzheimer’s Disease. Neuromolecular Med 2012; 15:25-48. [DOI: 10.1007/s12017-012-8207-9] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Accepted: 11/02/2012] [Indexed: 10/27/2022]
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5
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Han JY, Theil KS, Hoeltge G. Frequencies and characterization of cytogenetically unrelated clones in various hematologic malignancies: seven years of experiences in a single institution. ACTA ACUST UNITED AC 2006; 164:128-32. [PMID: 16434315 DOI: 10.1016/j.cancergencyto.2005.07.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2005] [Revised: 07/18/2005] [Accepted: 07/19/2005] [Indexed: 11/26/2022]
Abstract
Cytogenetically unrelated clones are uncommon findings in hematologic disorders. In the present study, among the 1,110 various hematologic malignancies analyzed during the past seven years, 27 (2.4%) patients had karyotypically unrelated clones: 3.5% (7/202) of acute myeloid leukemias, 5.3% (11/206) of myelodysplastic syndromes, none of 40 acute lymphoblastic leukemias, 0.4% (1/233) of myeloproliferative disorders, and 2.6% (8/306) lymphoproliferative disorders with clonal chromosomal abnormalities. Twenty-five patients showed two unrelated clones and two had three unrelated clones. The most consistent chromosome abnormalities were del(5q) (seven cases), +8 (six cases), del(20q) (five cases), and del(7q), +12, +21, and -22 (three cases each). Of interest, the high frequency of different numeric or structural abnormalities affecting the same chromosomes in such clones supports the hypothesis that these karyotypically unrelated clones originate from the common malignant clone through submicroscopic molecular genetic changes and evolutionary processes.
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Affiliation(s)
- Jin-Yeong Han
- Department of Clinical Pathology, The Cleveland Clinic Foundation, Cleveland, OH, USA.
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6
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Abstract
Robertsonian translocations are the most common constitutional structural abnormalities but are rarely reported as acquired aberrations in hematologic malignancies. The nonhomologous acrocentric rearrangements are designated as Robertsonian translocations, whereas the homologous acrocentric rearrangements are referred to as isochromosomes. Robertsonian rearrangements have the highest mutation rates of structural chromosome rearrangements based on surveys of newborns and spontaneous abortions. It would be expected that Robertsonian recombinations would be more common than suggested by the literature. A survey of the cytogenetics database from a single institution found 17 patients with acquired Robertsonian rearrangement and hematologic malignancies. This is combined with data from the literature for a total of 237 patients. All of the possible types of Robertsonian rearrangements have been reported in hematologic malignancies, with the i(13q), i(14q), and i(21q) accounting for nearly 60%. Complex karyotypic changes are seen in the majority of cases, corresponding with disease evolution. These karyotypes consistently show loss of chromosomes 5 and/or 7 in the myelocytic disorders, nonacrocentric isochromosomes, and centromeric breakage and reunion. However, nearly 25% of the acquired rearrangements were found as the sole abnormality or in addition to an established cytogenetic aberration. Most of these were the i(14q) with the myelodysplasia subtypes refractory anemia and chronic myelomonocytic leukemia.
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Affiliation(s)
- Jeanna Welborn
- Department of Internal Medicine and Pathology, University of California at Davis Medical Center Cancer Center, Room 3017, 4501 X Street, Sacramento, CA 95817 USA.
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7
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Moreira I, Papaioannou M, Mortuza FY, Gameiro P, Palmisano GL, Harrison CJ, Prentice HG, Mehta AB, Hoffbrand AV, Foroni L. Heterogeneity of VH-JH gene rearrangement patterns: an insight into the biology of B cell precursor ALL. Leukemia 2001; 15:1527-36. [PMID: 11587210 DOI: 10.1038/sj.leu.2402234] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Oligoclonal B cell proliferation, as defined by the presence of more than one leukemic clone, has been detected in approximately 20% to 30% of patients with acute lymphoblastic leukemia (ALL) using PCR or Southern blotting. An accurate assessment of these populations is required to avoid false negative measurements of minimal residual disease (MRD) in follow-up bone marrow (BM) samples of ALL patients. In this study, we analysed 29 ALL patients with two or more immunoglobulin heavy (IGH) chain gene rearrangements in the presentation samples using IGH fingerprinting PCR and sequence analysis. Thirty-nine (51%) of 76 sequences (from 15 patients), shared no VNDNJ homology (ie different CDR3 regions). In the remaining 14 patients, at least two related VH sequences were identified in each patient (identical DNJ sequences). Numerical abnormalities of chromosome 14 was detected in 10 patients. Eight patients were analysed at presentation and relapse. In four of them, expansion of a minor presentation-clone was detected at relapse while the major presentation clone disappeared, confirming 'subclonal evolution'. Finally, in our cohort of patients, the presence of related or unrelated IGH clones did not influence overall survival.
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Affiliation(s)
- I Moreira
- Haematology Department, Royal Free and University College School of Medicine, London, UK
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8
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Bromidge T, Lowe C, Prentice A, Johnson S. p53 intronic point mutation, aberrant splicing and telomeric associations in a case of B-chronic lymphocytic leukaemia. Br J Haematol 2000. [DOI: 10.1111/j.1365-2141.2000.02335.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Bromidge T, Lowe C, Prentice A, Johnson S. p53 intronic point mutation, aberrant splicing and telomeric associations in a case of B-chronic lymphocytic leukaemia. Br J Haematol 2000; 111:223-9. [PMID: 11091205 DOI: 10.1046/j.1365-2141.2000.02335.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We report a case of chronic lymphocytic leukaemia (CLL) with telomeric associations and a p53 intronic point mutation. Karyotypic analysis revealed clonal and non-clonal telomeric associations, accompanied by clonal cytogenetic abnormalities and also in isolation. The p53 mutation, which occurred at the invariant base pair -2 of the splice acceptor site in intron 7 resulted in the abolition of correct splicing of exon 7 to exon 8. Multiple aberrant splice products were characterized, all of which differed from wildtype in the DNA binding domain. Fluorescence in situ hybridization demonstrated that the clone retained two copies of the p53 gene and wild-type p53 transcript was detected on cloning of reverse transcriptase polymerase chain reaction (RT-PCR) product, indicating that one wild-type allele remained. However, a plasmid clone with correct splicing at the exon 7/8 boundary, but with a 21 bp deletion in exon 8, was also found at low frequency. This finding indicates clonal evolution, resulting in complete loss of wild-type p53. The intronic point mutation was not present in DNA extracted from cervical tissue indicating that it was a leukaemic phenomenon. This is the first case of an intronic point mutation to be reported in CLL. This mutation led to chaotic p53 expression and, interestingly, occurred in a case showing telomeric associations, a rare phenomenon in B-CLL.
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MESH Headings
- Amino Acid Sequence
- Base Sequence
- Carcinoma, Squamous Cell/complications
- Carcinoma, Squamous Cell/genetics
- Chromosomes, Human, Pair 12
- Chromosomes, Human, Pair 2
- Chromosomes, Human, Pair 9
- Female
- Genes, p53
- Humans
- Introns
- Karyotyping
- Leukemia, Lymphocytic, Chronic, B-Cell/complications
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Lip Neoplasms/complications
- Lip Neoplasms/genetics
- Middle Aged
- Molecular Sequence Data
- Neoplasms, Multiple Primary/genetics
- Point Mutation
- RNA Splice Sites
- Reverse Transcriptase Polymerase Chain Reaction
- Telomere
- Trisomy
- Uterine Cervical Neoplasms/complications
- Uterine Cervical Neoplasms/genetics
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Affiliation(s)
- T Bromidge
- Leukaemia Research Unit, Taunton and Somerset Hospital, UK.
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10
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Nagata T, Mugishima H, Yoden A, Yoshikawa K, Oguni T, Yamashiro K, Yamamori S, Harada K. A case of monoclonal gammopathy associated with acute myelomonocytic leukemia with eosinophilia suggested to be the result of lineage infidelity. Am J Hematol 2000; 65:66-71. [PMID: 10936867 DOI: 10.1002/1096-8652(200009)65:1<66::aid-ajh12>3.0.co;2-t] [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: 11/06/2022]
Abstract
Acute myelomonocytic leukemia (AMMoL) accompanied by monoclonal gammopathy is a rare condition, and its pathogenesis and the cytogenetic mechanism of such leukemogenesis have not been determined in detail. A case of AMMoL with eosinophilia accompanied by immunoglobulin G kappa monoclonal gammopathy is described. Immunophenotypic studies of the peripheral blood and bone marrow mononuclear cells revealed no evidence of abnormally proliferating cells of B-lineage. DNA analyses of bone marrow mononuclear cells containing leukemic cells revealed rearrangement of the kappa-light chain (Igkappa) gene and c-myc and c-jun proto-oncogenes. The intensities of the rearranged bands for these genes on Southern blot analysis suggested the existence of a major population of leukemic cells with rearranged Igkappa gene and minor population(s) of leukemic cells with rearranged c-myc and/or c-jun proto-oncogene(s) in the patient's bone marrow and indicated the occurrence of genetic evolutionary changes in leukemic cells in this patient before starting chemotherapy. These results suggest that these leukemic cells are the most likely candidate for immunoglobulin G kappa monoclonal protein production, and structural abnormalities of c-myc and c-jun proto-oncogenes may have contributed to the evolution of leukemic cells in this patient.
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MESH Headings
- Blotting, Southern
- Bone Marrow Cells/chemistry
- Cell Division
- Child, Preschool
- DNA/analysis
- Eosinophilia/complications
- Gene Rearrangement
- Genes, fos
- Genes, jun
- Genes, myc
- Humans
- Immunoglobulin G
- Immunoglobulin kappa-Chains/genetics
- Immunophenotyping
- Leukemia, Myelomonocytic, Acute/complications
- Leukemia, Myelomonocytic, Acute/drug therapy
- Leukemia, Myelomonocytic, Acute/genetics
- Leukocytes, Mononuclear/chemistry
- Leukocytes, Mononuclear/immunology
- Male
- Paraproteinemias/complications
- Paraproteinemias/genetics
- Proto-Oncogene Mas
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Affiliation(s)
- T Nagata
- Department of Pediatrics, Nihon University, School of Medicine, Tokyo, Japan.
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11
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Abstract
Chronic lymphocytic leukemia (CLL) is well characterized clinically and immunophenotypically. Demonstration of a monotypic CD19+, CD5+ B-cell population is central to the diagnosis. We report 2 cases of biclonal CLL. Two elderly men were encountered with an absolute lymphocytosis consisting of the typical CD5+, CD19+, CD23+ B-cell population seen in CLL; however, immunoglobulin light chain restriction by flow cytometry was not apparent as B cells expressed kappa or lambda light chains without a clear monotypic population. Molecular genetic analysis of flow cytometry-sorted cells (kappa and lambda populations) revealed in both cases 2 monoclonal B-cell populations. The characterization of these cases and a review of the issues surrounding biclonal CLL are presented.
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MESH Headings
- Aged
- Antigens, Differentiation, B-Lymphocyte/analysis
- B-Lymphocyte Subsets/metabolism
- B-Lymphocyte Subsets/pathology
- Blotting, Southern
- Clone Cells
- DNA, Neoplasm/analysis
- Flow Cytometry
- Gene Rearrangement, B-Lymphocyte, Heavy Chain
- Humans
- Immunoglobulin Light Chains/analysis
- Immunoglobulin kappa-Chains/metabolism
- Immunoglobulin lambda-Chains/metabolism
- Immunophenotyping
- Karyotyping
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/metabolism
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Male
- Polymerase Chain Reaction
- Tumor Cells, Cultured
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Affiliation(s)
- E D Hsi
- Department of Clinical Pathology, Cleveland Clinic Foundation, OH 44195, USA
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12
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Morris C, Luppi M, McDonald M, Barozzi P, Torelli G. Fine mapping of an apparently targeted latent human herpesvirus type 6 integration site in chromosome band 17p13.3. J Med Virol 1999; 58:69-75. [PMID: 10223549 DOI: 10.1002/(sici)1096-9071(199905)58:1<69::aid-jmv11>3.0.co;2-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
An unusually high level of latent HHV-6 infection has been documented in the peripheral blood and/or bone marrow cells of a small group of patients with predominantly malignant lymphoid disorders, and in at least one healthy individual. We have shown previously in peripheral blood mononuclear cells (PBMCs) of three patients, two with a history of lymphoma and one with multiple sclerosis, a specific target site for latent integration of the full-length HHV-6 viral genome on the distal short arm of chromosome 17, in band p13.3. Fluorescence in situ hybridization (FISH) procedures were used to map more precisely the location of the viral integration site in one of those patients, relative to two known oncogenes mapped previously, namely CRK, and the more telomeric ABR oncogene. It is shown that the HHV-6 integration site is located at least 1,000 kb telomeric of ABR, and is very likely to map close to or within the telomeric sequences of 17p. This finding is significant given that human telomeric-like repeats flank the terminal ends of the HHV-6 genome. Cytogenetic studies showed evidence of karyotype instability in the peripheral blood cells infected latently.
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Affiliation(s)
- C Morris
- Department of Pathology, Christchurch School of Medicine, New Zealand
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13
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Johansson B, Billstr�m R, Broberg K, Fioretos T, Nilsson PG, Ahlgren T, Malm C, Samuelsson BO, Mitelman F. Cytogenetic polyclonality in hematologic malignancies. Genes Chromosomes Cancer 1999. [DOI: 10.1002/(sici)1098-2264(199903)24:3<222::aid-gcc7>3.0.co;2-a] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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14
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Abstract
Cytogenetic analysis of patients with chronic B-cell leukemia (B-CLL) indicates that 50% have chromosome abnormalities, while fluorescence in situ hybridization (FISH) and molecular techniques reveal an even higher incidence. Trisomy 12 and deletions or translocation of chromosome 13q14 are the most common abnormalities, but in neither case has the gene or genes involved in the abnormalities been identified. Combined FISH and immunophenotyping studies suggest that both abnormalities are secondary events in B-CLL. Other recurring chromosome abnormalities include 6q-, 11q- and 12p-, but the genes involved in these abnormalities have not been identified. Involvement of the BCL1, BCL2, and BCL3 genes has been reported, but the numbers are low and the cases tend to be atypical. Trisomy 12 in association with complex karyotypic abnormalities is associated with a poor prognosis, and FISH studies show a strong correlation between trisomy 12, atypical morphology, and advanced disease. Ten to 15% of patients have mutations of p53 which is associated with advanced disease, resistance to treatment, and poor survival.
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Affiliation(s)
- P E Crossen
- Cytogenetic and Molecular Oncology Unit, Christchurch Hospital, New Zealand
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15
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Temperani P, Giacobbi F, Gandini G, Torelli U, Emilia G. Chromosome rearrangements at telomeric level in hematologic disorders. CANCER GENETICS AND CYTOGENETICS 1995; 83:121-6. [PMID: 7553581 DOI: 10.1016/0165-4608(94)00222-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Following retrospective screening of our karyotype data from 414 consecutive non-childhood, neoplastic, and preneoplastic hematologic diseases, we have isolated 11 cases with alterations involving one or two chromosome termini, including: a) nonclonal telomeric telomeric associations (tas), b) subclonal terminal rearrangements consisting of additional (add) material of unknown origin fused at the end of the chromosome, c) clonal telomere-centromere fusion (t telcen) with pseudodicentric structure. Most of these abnormalities were present in karyotypes with multiple alterations and associated to an evolutive stage of the disease (9 of 94 cases studied in progression, including three of 22 CML studied in blast crisis). The immunophenotype of the cell populations was lymphoid in eight cases, six of which were NHL, and myeloid, erythroid, and undifferentiated in the other three. More data on telomeric abnormalities may clarify whether there is ubiquitous genomic instability of neoplastic cells or an inborn cell lineage predisposition favoring rearrangements involving telomeres.
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Affiliation(s)
- P Temperani
- Department of Medical Sciences, University of Modena, Italy
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