Expression of eight genes of nuclear factor-kappa B pathway in multiple myeloma using bone marrow aspirates obtained at diagnosis

Expression of eight genes of nuclear factor-kappa B pathway in multiple myeloma using bone marrow aspirates obtained at diagnosis

Author Almeida, Manuella de Souza Sampaio Autor UNIFESP Google Scholar
Vettore, Andre Luiz Autor UNIFESP Google Scholar
Yamamoto, Mihoko Autor UNIFESP Google Scholar
Chauffaille, Maria de Lourdes Lopes Ferrari Autor UNIFESP Google Scholar
Zago, Marco Antonio Google Scholar
Colleoni, Gisele Wally Braga Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Ludwig Inst Canc Res
Universidade de São Paulo (USP)
Abstract Purpose: To evaluate the expression of NF-kappa B pathway genes in total bone marrow samples obtained from MM at diagnosis using real-time quantitative PCR and to evaluate its possible correlation with disease clinical features and survival. Material and methods: Expression of eight genes related to NF-kappa B pathway (NFKB1, IKB, RANK, RANKL, OPG, IL6, VCAM1 and ICAM1) were studied in 53 bone marrow samples from newly diagnosed MM patients and in seven normal controls, using the Taqman system. Genes were considered overexpressed when tumor expression level was at least four times higher than that observed in normal samples. Results: The percentages of overexpression of the eight genes were: NFKB1 0%, IKB 22.6%, RANK 15.1%, RANKL 31.3%, OPG 7.5%, IL6 39.6%, VCAM1 10% and ICAM1 26%. We found association between IL6 expression level and International Staging System (ISS) (p = 0.01), meaning that MM patients with high ISS scores have more chance of overexpression of IL6. The mean value of ICAM1 relative expression was also associated with the ISS score (p = 0.02). Regarding OS, cases with IL6 overexpression present worse evolution than cases with IL6 normal expression (p = 0.04). Conclusion: We demonstrated that total bone marrow aspirates can be used as a source of material for gene expression studies in MM. In this context, we confirmed that IL6 overexpression was significantly associated with worse survival and we described that it is associated with high ISS scores. Also, ICAM1 was overexpressed in 26% of cases and its level was associated with ISS scores.
Keywords Multiple myeloma
International staging System
Nuclear factor-kappa B
Language English
Sponsor Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Grant number FAPESP: 01/13086-3
FAPESP: 04/13213-3
Date 2009-08-01
Published in Histology And Histopathology. Murcia: F Hernandez, v. 24, n. 8, p. 991-997, 2009.
ISSN 0213-3911 (Sherpa/Romeo, impact factor)
Publisher F Hernandez
Extent 991-997
Access rights Closed access
Type Article
Web of Science ID WOS:000267334200003

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