High incidence of N and K-Ras activating mutations in multiple myeloma and primary plasma cell leukemia at diagnosis
Using allele‐specific amplification method (ARMS), a highly sensitive one‐stage allele‐specific PCR, we have evaluated the incidence of NRAS and KRAS2 activating mutations (codons 12, 13, and 61) in 62 patients with either monoclonal gammopathy of undetermined significance (MGUS) or multiple myeloma...
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Published in | Human mutation Vol. 18; no. 3; pp. 212 - 224 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
New York
John Wiley & Sons, Inc
01.09.2001
Hindawi Limited |
Subjects | |
Online Access | Get full text |
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Summary: | Using allele‐specific amplification method (ARMS), a highly sensitive one‐stage allele‐specific PCR, we have evaluated the incidence of NRAS and KRAS2 activating mutations (codons 12, 13, and 61) in 62 patients with either monoclonal gammopathy of undetermined significance (MGUS) or multiple myeloma (MM), primary plasma‐cell leukemia (P‐PCL), and also in human myeloma cell lines (HMCL). NRAS and/or KRAS2 mutations were found in 54.5% of MM at diagnosis (but in 81% at the time of relapse), in 50% of P‐PCL, and in 50% of 16 HMCL. In contrast, the occurrence of such mutations was very low in MGUS and indolent MM (12.50%). Of note, KRAS2 mutations were always more frequent than NRAS. The validity of the technique was assessed by direct sequencing of cell lines and of some patients. Multiple mutations found in two patients were confirmed by subcloning exon PCR amplification products, testing clones with our method, and sequencing them. Thus, these early mutations could play a major role in the oncogenesis of MM and P‐PCL. Hum Mutat 18:212–224, 2001. © 2001 Wiley‐Liss, Inc. |
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Bibliography: | ArticleID:HUMU1177 istex:55C1DAF127A48FFE26A7E5ABD88C13F239F12B86 ark:/67375/WNG-8XQXX1PD-1 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1059-7794 1098-1004 |
DOI: | 10.1002/humu.1177 |