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Aktas Samur A, Minvielle S, Shammas M, Fulciniti M, Magrangeas F, Richardson PG, Moreau P, Attal M, Anderson KC, Parmigiani G, Avet-Loiseau H, Munshi NC, Samur MK. Deciphering the chronology of copy number alterations in Multiple Myeloma. Blood Cancer J 2019; 9:39. [PMID: 30914633 PMCID: PMC6435669 DOI: 10.1038/s41408-019-0199-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 03/07/2019] [Accepted: 03/12/2019] [Indexed: 01/09/2023] Open
Abstract
Multiple myeloma (MM) and its precursor condition MGUS are characterized by chromosomal aberrations. Here, we comprehensively characterize the order of occurrence of these complex genomic events underlying MM development using 500 MGUS, and MM samples. We identify hyperdiploid MM (HMM) and non-HMM as genomically distinct entities with different evolution of the copy number alterations. In HMM, gains of 9,15 or 19 are the first and clonal events observed as clonal even at MGUS stage. These events are thus early and may underlie initial transformation of normal plasma cells to MGUS cells. However, CNAs may not be adequate for progression to MM except in 15% of the patients in whom the complex subclonal deletion events are observed in MM but not MGUS. In NHMM, besides the driver translocations, clonal deletion of 13 and 1q gain are early events also observed in MGUS. We combined this information to propose a timeline for copy number alteration.
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Affiliation(s)
- Anil Aktas Samur
- Department of Data Sciences, Dana Farber Cancer Institute, Boston, MA, 02215, USA.,Department of Biostatistics, Harvard T.H. Chan School of Public Health Boston, Boston, MA, 02115, USA
| | - Stephane Minvielle
- Inserm UMR892, CNRS 6299, Université de Nantes; Centre Hospitalier Universitaire de Nantes, Unité Mixte de Genomique du Cancer, Nantes, France
| | - Masood Shammas
- Department of Medical Oncology, Dana Farber Cancer Institute, Harvard Medical School, Boston, MA, 02115, USA.,VA Boston Healthcare System, Boston, MA, 02115, USA
| | - Mariateresa Fulciniti
- Department of Medical Oncology, Dana Farber Cancer Institute, Harvard Medical School, Boston, MA, 02115, USA
| | - Florence Magrangeas
- Inserm UMR892, CNRS 6299, Université de Nantes; Centre Hospitalier Universitaire de Nantes, Unité Mixte de Genomique du Cancer, Nantes, France
| | - Paul G Richardson
- Department of Medical Oncology, Dana Farber Cancer Institute, Harvard Medical School, Boston, MA, 02115, USA
| | - Philippe Moreau
- Inserm UMR892, CNRS 6299, Université de Nantes; Centre Hospitalier Universitaire de Nantes, Unité Mixte de Genomique du Cancer, Nantes, France
| | - Michel Attal
- University Cancer Center of Toulouse Institut National de la Santé, Toulouse, France
| | - Kenneth C Anderson
- Department of Medical Oncology, Dana Farber Cancer Institute, Harvard Medical School, Boston, MA, 02115, USA
| | - Giovanni Parmigiani
- Department of Data Sciences, Dana Farber Cancer Institute, Boston, MA, 02215, USA.,Department of Biostatistics, Harvard T.H. Chan School of Public Health Boston, Boston, MA, 02115, USA
| | - Hervé Avet-Loiseau
- University Cancer Center of Toulouse Institut National de la Santé, Toulouse, France. .,Unité de Génomique du Myélome, IUC-Oncopole 2 Avenue Hubert Curien Cedex 1, Toulouse, 31037, France.
| | - Nikhil C Munshi
- Department of Medical Oncology, Dana Farber Cancer Institute, Harvard Medical School, Boston, MA, 02115, USA. .,VA Boston Healthcare System, Boston, MA, 02115, USA.
| | - Mehmet Kemal Samur
- Department of Data Sciences, Dana Farber Cancer Institute, Boston, MA, 02215, USA. .,Department of Biostatistics, Harvard T.H. Chan School of Public Health Boston, Boston, MA, 02115, USA. .,Department of Medical Oncology, Dana Farber Cancer Institute, Harvard Medical School, Boston, MA, 02115, USA.
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Parfett CL, Healy C. Tandemly repeated DNA sequence instabilities induced by two promoters of morphological transformation in vitro: a short-term response to non-mutagenic agents in C3H/10T1/2 cells. Mutat Res 2006; 604:42-52. [PMID: 16459133 DOI: 10.1016/j.mrgentox.2005.12.008] [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] [Received: 06/20/2005] [Revised: 12/12/2005] [Accepted: 12/20/2005] [Indexed: 11/23/2022]
Abstract
The ability of tumour promoters to alter DNA stability within regions that contain tandemly repeated sequences (TRSs), was studied in a cell culture model of multi-stage carcinogenesis. Non-cytotoxic concentrations of TPA (12-O-tetradecanoyl-phorbol-13-acetate) and xanthine oxidase with xanthine substrate, sufficient to promote morphological transformation in C3H/10T1/2 cultures, were tested for their effects on mutation frequencies in TRSs by a DNA fingerprinting approach. Specifically, restriction digests of genomic DNA samples from randomly selected, non-transformed clones, isolated from cultures after several days exposure to promoters, were visualized by Southern hybridizations with the multi-locus pentamer repeat sequence probe, Ms6-Hm (Pc-1). Basal and promoter-induced frequencies of sub-clone TRS fingerprint polymorphisms were estimated in five cell populations: an uncloned stock culture, three populations established from normal-appearing sub-clones, and one clonal population established from a 3-methylcholanthrene (MCA)-transformed focus. Basal variant fingerprint frequencies spanned a range from 0.0 to 0.43% mutants/band among cells from the four untransformed populations. Both TPA and xanthine oxidase treatments significantly increased recorded mutation frequencies, 2.3- and 2.7-fold, respectively, using combined data from the progenitor population and three untransformed clones. The untreated MCA-transformed clonal population appeared to contain a single, pre-existing mutant restriction fragment, but additional mutations were induced thereafter, in response to the promoting treatments. Taken together, the measured increases in mutations were highly significant and suggest that promoters of cell transformation in the C3H/10T1/2 cell line might induce a genome-wide instability targeted to regions containing Ms6-Hm sequence motifs.
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Affiliation(s)
- Craig L Parfett
- Mutagenesis Section, Healthy Environments and Consumer Safety Branch, Health Canada, Environmental Health Centre 0803A, Tunney's Pasture, Ottawa, Ont., Canada K1A 0L2.
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Abstract
It is now clear from in vitro studies that mutagens induce recombination in the cell, both homologous and nonhomologous exchanges. The recombination events induced are extrachromosomal events, exchanges between extrachromosomal DNA and chromosomes, and inter- as well as intrachromosomal exchanges. However, not all types of DNA damage can induce recombination. The mechanisms involved in the induction process are not known but may involve activation of DNA repair systems. In addition, stimulation of mRNA transcription by mutagens, different recombination pathways and how the assay system is constructed may affect the frequency and characteristics of the observed recombination events.
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Affiliation(s)
- D Hellgren
- Department of Clinical Genetics, Karolinska Hospital, Karolinska Institute, Stockholm, Sweden
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Takada T, Suzuki S, Sugawara Y, Kominami R, Arakawa M, Niwa O, Yokoro K. Somatic mutation during metastasis of a mouse fibrosarcoma line detected by DNA fingerprint analysis. Jpn J Cancer Res 1992; 83:165-70. [PMID: 1555998 PMCID: PMC5918783 DOI: 10.1111/j.1349-7006.1992.tb00082.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Metastatic nodules were examined by DNA fingerprint analysis. The probes used, Pc-1 and Pc-2, detect mutations as shifts in bands of the minisatellite loci which are dispersed among chromosomes. Four clonal lines of a fibrosarcoma from an F1 mouse (C57BL/Ka x C3H/He) were selected for various metastatic potentials upon inoculation into syngeneic mice. These four lines exhibited many extra bands resulting from recombination and/or DNA slippage, indicating accumulation of mutations during the successive passages in mice. One of the four, a 505 cell line which had been passaged extensively in vitro and consisted of a heterogenous population, was inoculated into thirteen syngeneic mice, and gave rise to six lung metastatic nodules in two mice. All the nodules showed band-patterns distinct from one another, although nodules within a given mouse tended to show similar patterns. When a genetically tagged 505-05-01 clone was analyzed, three of nine metastatic nodules obtained also revealed new bands. These results strongly suggest that somatic mutations occur at a high frequency during metastasis, providing direct evidence of genetic instability of the tumor cells.
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Affiliation(s)
- T Takada
- First Department of Biochemistry, Niigata University School of Medicine
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