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Article Dans Une Revue Oncotarget Année : 2015

miRNAs in multiple myeloma - a survival relevant complex regulator of gene expression

A Seckinger
  • Fonction : Auteur
J Hillengass
  • Fonction : Auteur
M. Castoldi
  • Fonction : Auteur
Anthony D. Ho
  • Fonction : Auteur
A. Jauch
  • Fonction : Auteur
H Goldschmidt
  • Fonction : Auteur
B Klein
D Hose
  • Fonction : Auteur

Résumé

Purpose: microRNAs regulate gene-expression in biological and pathophysiological processes, including multiple myeloma. Here we address i) What are the number and magnitude of changes in miRNA-expression between normal plasma cells and myeloma- or MGUS-samples, and the latter two? ii) What is the biological relevance and how does miRNA-expression impact on gene-expression? iii) Is there a prognostic significance, and what is its background? Experimental design: Ninety-two purified myeloma-, MGUS-, normal plasma cell- and myeloma cell line-samples were investigated using miChip-arrays interrogating 559 human miRNAs. Impact on gene-expression was assessed by Affymetrix DNA-microarrays in two cohorts of myeloma patients (n = 677); chromosomal aberrations were assessed by iFISH, survival for 592 patients undergoing up-front high-dose chemotherapy. Results: Compared to normal plasma cells, 67/559 miRNAs (12%) with fold changes of 4.6 to -3.1 are differentially expressed in myeloma-, 20 (3.6%) in MGUS-samples, and three (0.5%) between MGUS and myeloma. Expression of miRNAs is associated with proliferation, chromosomal aberrations, tumor mass, and gene expression-based risk-scores. This holds true for target-gene signatures of regulated mRNAs. miRNA-expression confers prognostic significance for event-free and overall survival, as do respective target-gene signatures. Conclusions: The myeloma-miRNome confers a pattern of small changes of individual miRNAs impacting on gene-expression, biological functions, and survival.
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Dates et versions

hal-01237028 , version 1 (14-05-2024)

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A Seckinger, T Meissner, Jérôme Moreaux, V. Benes, J Hillengass, et al.. miRNAs in multiple myeloma - a survival relevant complex regulator of gene expression. Oncotarget, 2015, 6 (36), pp.39165-39183. ⟨10.18632/oncotarget.5381⟩. ⟨hal-01237028⟩
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