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• W3046557478 abstract "Abstract Background: Bone marrow microenvironment plays a crucial role in the pathogenesis of multiple myeloma (MM) by supporting plasma cell growth, survival and drug resistance. These abilities have been attributed in part to the secretion of growth factors and cytokines by bone marrow mesenchymal stromal cells (BM-MSC). microRNAs (miRNAs) are promising prognostic biomarkers and therapeutic targets that can be released and transferred among MM cells and BM-MSCs as cell-cell communication. Recently, we defined a serum 14-miRNA signature which was associated with progression and complete remission (CR) after autologous stem-cell transplantation (ASCT) in patients with MM. Patients in CR showed a partial recovery of the normal serum miRNA levels and these are similar to those samples from patients with monoclonal gammopathy of undetermined significance (MGUS). Thus, these results highlight the potential value of serum miRNAs as diagnostic and prognostic biomarkers with a cell origin different from malignant plasma cells. The aim of this study was to discover whether the MSC miRNA profile varies depending on the status of the disease. Methods: Mononuclear cells from BM samples were cultured in DMEM containing 10% FBS. After a week, non-adherent cells were removed, whereas BM-MSC were selected by their adherence to the plastic and their phenotype was confirmed by multiparametric flow cytometry. We analyzed 670 microRNAs in 20 primary BM-MSC from patients with MGUS (N=4), symptomatic MM (N=8) and MM in CR (N=8). miRNAs differentially expressed were identified according to a supervised analysis using significance analysis of microarrays (SAM) and Student's t-test based on multivariate permutation (with random variance model). miRNAs differentially expressed between groups of patients were validated in an extended cohort of BM-MSC from patients (N= 82) in all the different status disease: MGUS (N=23), MM at diagnosis (N=13), relapsed MM (N=11), MM in partial response (PR) (N=13) and MM in CR (N=22), as well as in malignant plasma cells (CD38+) from those patients with symptomatic MM. In order to identify miRNA targets, we used the RmiR package to cross-correlate the miRNA expression data from the present study with our findings on the gene expression signature in 12 BM-MSCs from patients (4 MGUS, 4 symptomatic MM and 4 in CR), based on the predicted targets from TargetScan and miRBase databases. Results: In the screening phase, we identified a miRNA profile of 10 miRNAs (miR-663b, miR-654-3p, miR-206, miR-411*, miR-885-5p, miR-668, miR-638, miR-485-3p, miR-744* and miR-199a) differentially expressed between patients with symptomatic MM and MM in CR (adjusted p-value Conclusion: In patients with monoclonal gammopathies, miR-485-3p and miR-654-3p expression in mesenchymal stromal cells from bone marrow is related to the status of the disease and the response to treatment in MM. The modulation of miRNAs profile in the bone marrow microenvironment around malignant plasma cells could be an important mechanism of control by cell-cell communication and the basis for potential biomarkers in serum and bone marrow. Download : Download high-res image (138KB) Download : Download full-size image Disclosures Rosinol: Celgene: Honoraria; Janssen: Honoraria." @default.
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• W3046557478 date "2017-12-07" @default.
• W3046557478 modified "2023-09-28" @default.
• W3046557478 title "Micrornas in Bone Marrow Mesenchymal Stromal Cells Are Differentially Expressed According to Response in Multiple Myeloma" @default.
• W3046557478 doi "https://doi.org/10.1182/blood.v130.suppl_1.4362.4362" @default.
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