A new multiple myeloma cell line, MEF-1, possesses cyclin d1 overexpression and the p53 mutation
✍ Scribed by Yuji Yufu; Tatsuro Goto; Ilseung Choi; Naokuni Uike; Mitsuo Kozuru; Koichi Ohshima; Toshiyasu Taniguchi; Toru Motokura; Yasushi Yatabe; Shigeo Nakamura
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 401 KB
- Volume
- 85
- Category
- Article
- ISSN
- 0008-543X
No coin nor oath required. For personal study only.
✦ Synopsis
BACKGROUND. The t(11;14)(q13;q32) translocation with cyclin D1 overexpression commonly is found in multiple myeloma (MM) and in mantle cell lymphoma (MCL). Several reports have shown that p53 mutations in MCL lead to blastoid transformation and a worse prognosis; however, the role of p53 mutations in MM with t(11;14) is unclear.
METHODS.
In this study the authors describe a patient with MM with t(11;14) and a p53 mutation at presentation and characterized a cell line, MEF-1, established from this patient. Immunohistochemical analysis of p53 and cyclin D1 proteins was performed. The p53 gene was analyzed by polymerase chain reaction-single strand conformation polymorphism and direct sequencing. The expression of cyclin D1 mRNA was examined by Northern blot analysis.
RESULTS.
MEF-1 had t(11;14) with overexpression of cyclin D1 mRNA and produced immunoglobulin -light chain. MEF-1 had a mutation in exon 7 (codon 255-257) of the p53 gene, which was noted in the patient's myeloma cells.
CONCLUSIONS. p53 mutations may be important genetic events in disease progression of MM with t(11;14). The MEF-1 cell line may be a useful tool to study mechanisms of progression in MM based on abnormalities of the cyclin D1 gene.