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Incidence of cytogenetic aberrations in two B lineage subpopulations in multiple myeloma patients analyzed by combination of whole-genome profiling and FISH

J. Smetana, E. Dementyeva, F. Kryukov, P. Nemec, H. Greslikova, R. Kupska, A. Mikulasova, I. Ihnatova, R. Hajek, P. Kuglik

. 2014 ; 61 (1) : 48-55.

Language English Country Slovakia

Document type Research Support, Non-U.S. Gov't

Persistent link   https://www.medvik.cz/link/bmc15001172

Grant support
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NT12130 MZ0 CEP Register
NT13190 MZ0 CEP Register
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Multiple myeloma (MM) is an incurable malignant disease of the terminal developmental stage of B-lymphocytes. While genetic heterogeneity of MM is widely described, little is known about its genetic basis as well as primary damage during plasma cells (PC) development. In this study, we focused on genome-wide screening of DNA copy number changes using oligonucleotide-based array-CGH together with I-FISH of the IgH locus rearrangements in pair samples of bone marrow B-cells (CD19+) and CD138+ PC from newly diagnosed MM patients. The IgH disruption was found in 8.9% (4/45) of CD19+ samples and in 57.8% (26/45) of CD138+ samples. The genomic profiling using array-CGH identified copy number alterations (CNAs) in 10% (2/20) of CD19+ samples in regions known to be important for MM pathogenesis. In contrast, we found CNAs in 100% (16/16) of CD138+ samples. Most common chromosomal abnormalities were trisomies of odd-numbered chromosomes (3, 5, 7, 9, 11, 15, 19 and 21), gain 1q, gain Xq and monosomy of chromosome 13. We did not find any correlation between incidence of CNAs in CD19+ and CD138+ cells. In conclusion, effective utilization of FISH and array-CGH can identify genetic lesions in premalignant stages leading to better understanding and characterization of MM.

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$a Smetana, Jan $7 xx0128923 $u Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic; Babak Myeloma Group, Department of Pathological Physiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
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$a Incidence of cytogenetic aberrations in two B lineage subpopulations in multiple myeloma patients analyzed by combination of whole-genome profiling and FISH / $c J. Smetana, E. Dementyeva, F. Kryukov, P. Nemec, H. Greslikova, R. Kupska, A. Mikulasova, I. Ihnatova, R. Hajek, P. Kuglik
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$a Multiple myeloma (MM) is an incurable malignant disease of the terminal developmental stage of B-lymphocytes. While genetic heterogeneity of MM is widely described, little is known about its genetic basis as well as primary damage during plasma cells (PC) development. In this study, we focused on genome-wide screening of DNA copy number changes using oligonucleotide-based array-CGH together with I-FISH of the IgH locus rearrangements in pair samples of bone marrow B-cells (CD19+) and CD138+ PC from newly diagnosed MM patients. The IgH disruption was found in 8.9% (4/45) of CD19+ samples and in 57.8% (26/45) of CD138+ samples. The genomic profiling using array-CGH identified copy number alterations (CNAs) in 10% (2/20) of CD19+ samples in regions known to be important for MM pathogenesis. In contrast, we found CNAs in 100% (16/16) of CD138+ samples. Most common chromosomal abnormalities were trisomies of odd-numbered chromosomes (3, 5, 7, 9, 11, 15, 19 and 21), gain 1q, gain Xq and monosomy of chromosome 13. We did not find any correlation between incidence of CNAs in CD19+ and CD138+ cells. In conclusion, effective utilization of FISH and array-CGH can identify genetic lesions in premalignant stages leading to better understanding and characterization of MM.
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