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Cytokine gene expression in human multiple myeloma
M Portier1, X G Zhang, E Ursule
1INSERM U291, Immunopathologie des Maladies Tumorales et Autoimmunes, Montpellier, France.
British Journal of Haematology
|November 1, 1993
Summary
Cytokine gene expression in multiple myeloma (MM) patients reveals that interleukin-1 beta, interleukin-6, and granulocyte-colony-stimulating factor may drive MM in vivo. Transforming growth factor beta is consistently expressed in MM.
Area of Science:
- Molecular Biology
- Oncology
- Immunology
Background:
- Multiple myeloma (MM) is a cancer of plasma cells.
- Cytokines are crucial for myeloma-cell growth in vitro.
- The in vivo role of these cytokines in MM remains unclear.
Purpose of the Study:
- To investigate the gene expression of cytokines involved in myeloma-cell growth in MM patients and cell lines.
- To determine the in vivo relevance of specific cytokines in MM pathogenesis.
Main Methods:
- Northern blot analysis was used to detect cytokine gene expression.
- Total RNA from 36 MM patient tumor samples and poly(A)+ RNA from 10 human myeloma cell lines (HMCL) were analyzed.
- Gene expression of IL-1 alpha, IL-1 beta, IL-3, IL-6, GM-CSF, G-CSF, IL-2, LIF, and TGF-beta was assessed.
Main Results:
- IL-1 beta, IL-6, and G-CSF genes were coexpressed in most MM patients.
- IL-1 alpha transcripts were found in 32% of patients with IL-1 beta coexpression.
- Transforming growth factor beta (TGF-beta) mRNA was detected in all analyzed tumor samples and HMCL.
Conclusions:
- IL-1 beta, IL-6, and G-CSF are potential key players in MM development in vivo.
- TGF-beta is consistently expressed in MM, suggesting a significant role.
- Further research is needed to elucidate the precise functions of these cytokines in MM pathogenesis.