Different CD44 splicing patterns define prognostic subgroups in multiple myeloma

Stauder, R. and Van Driel, M. and Schwärzler, C. and Thaler, J. and Lokhorst, H. M. and Kreuser, E. D. and Bloem, A. C. and Günthert, U. and Eisterer, W.. (1996) Different CD44 splicing patterns define prognostic subgroups in multiple myeloma. Blood, 88 (8). pp. 3101-3108.

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Official URL: http://edoc.unibas.ch/dok/A5249221

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CD44 variant isoforms (CD44v) are generated by alternative splicing of the nuclear RNA resulting in the expression of additional protein domains in the extracellular region of the CD44 standard molecule (CD44s). In multiple myeloma (MM), CD44 mediates binding of tumor cells to stroma and regulates interleukin-6 production. To evaluate the role of CD44v isoforms in MM, CD44v expression was analyzed by immunohistochemical staining of 64 bone marrow biopsies from 38 MM patients. Expression of variant isoforms containing the 9v domain was observed in 36% of cases and was associated with an advanced stage (P > .02; n = 61), a progressive disease (P > .001; n = 61), and a shorter overall survival (P > .02; n = 36). In contrast, 3v, 4v, 6v, or 10v isoforms were detected only in a small percentage of the patients. To analyze the exon composition in RNA-transcripts, reverse transcriptase polymerase chain reaction analyses followed by Southern hybridization with exon-specific probes were performed in fluorescence-activated cell sorted myeloma plasma cells. Tumors expressing the 9v domain showed complex, 9v-containing transcripts in combinations with the 3v, 7v, 8v, and 10v exons. Identical transcripts were detected in several myeloma cell lines and in a Ki-1 B-immunoblastic lymphoma. Similar to high-grade non-Hodgkin's lymphoma and gastric and renal cell carcinoma, overexpression of 9v-containing isoforms in MM is related to an unfavorable clinical presentation and represents a new prognostic parameter.
Faculties and Departments:03 Faculty of Medicine > Bereich Querschnittsfächer (Klinik) > Pathologie USB > Neuro- und Muskelpathologie (Frank)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Querschnittsfächer (Klinik) > Pathologie USB > Neuro- und Muskelpathologie (Frank)
UniBasel Contributors:Günthert, Ursula
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
edoc DOI:
Last Modified:26 Sep 2017 08:44
Deposited On:22 Mar 2012 13:35

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