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In vivo induction of insulin-like growth factor-I receptor and CD44v6 confers homing and adhesion to murine multiple myeloma cells

Asosingh, K. and Günthert, U. and Bakkus, M. H. and De Raeve, H. and Goes, E. and Van Riet, I. and Van Camp, B. and Vanderkerken, K.. (2000) In vivo induction of insulin-like growth factor-I receptor and CD44v6 confers homing and adhesion to murine multiple myeloma cells. Cancer research, 60 (11). pp. 3096-3104.

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Official URL: http://edoc.unibas.ch/dok/A5249210

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Abstract

One of the main characteristics of multiple myeloma (MM) cells is their specific homing and growth in the bone marrow (BM). Differences between stroma-dependent and -independent MM cell lines may reveal key molecules that play important roles in their homing to the BM. We addressed this topic with a murine MM model, including the in vivo 5T33MM (5T33MMvv) stroma-dependent cell line and its in vitro stroma-independent variant (5T33MMvt). Fluorescence-activated cell-sorting analysis showed expression of insulin-like growth factor (IGF)-I receptor and CD44v6 on all 5T33MMvv cells but not on 5T33MMvt cells. Checkerboard analysis and adhesion assays revealed IGF-I-dependent chemotaxis toward BM-conditioned medium and involvement of CD44v6 in the adhesion to BM stroma of only 5T33MMvv cells. However, when 5T33MMvt cells were injected in vivo (5T33MMvt-vv), after 18 h the MM cells harvested from BM were IGF-I receptor and CD44v6 positive. This up-regulation was confirmed in 5T33MMvt-vv cells isolated from terminally diseased animals. These ST33MMvt-vv cells exhibited IGF-I-dependent chemotaxis and CD44v6-dependent adhesion to BM stroma. In vitro culture of the 5T33MMvt-vv cells could completely down-regulate IGF-I receptor and CD44v6. In fact, we could show that direct contact of 5T33MMvt cells with BM endothelial cells is a prerequisite for IGF-I receptor and CD44v6 up-regulation. These data indicate that the BM microenvironment is capable of up-regulating molecules such as IGF-I receptor and CD44v6, which facilitate homing of MM cells to the BM and support their adhesion to BM stroma.
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
Bibsysno:Link to catalogue
Publisher:American Association for Cancer Research
ISSN:0008-5472
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Last Modified:28 Sep 2017 06:11
Deposited On:22 Mar 2012 13:34

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