Esteves, G. (Graça)

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    Immune status of high-risk smoldering multiple myeloma patients and its therapeutic modulation under LenDex: a longitudinal analysis
    (American Society of Hematology, 2016) Perez-Simon, J.A. (José Antonio); Hernández-Martín, J. (J.); Bladé, J. (Joan); Vidriales, M.B. (María Belén); Mateos, M.V. (María Victoria); Arriba, F. (Felipe) de; Sanchez-Abarca, L.I. (Luis Ignacio); Esteves, G. (Graça); Hernandez, M.T. (Miguel Teodoro); Rosiñol, L. (Laura); Puig, N. (Noemí); Lahuerta, J.J. (Juan José); Giraldo, P. (P.); Teruel, A.I. (Ana Isabel); Paiva, B. (Bruno); Oriol, A. (Albert); Rubia, J. (Javier) de la; Corchete, L.A. (Luis A.); Prosper-Cardoso, F. (Felipe); Bargay, J. (Joan); Lopez-Corral, L. (Lucia); San-Miguel, J.F. (Jesús F.)
    Persistence of chemoresistant minimal residual disease (MRD) plasma cells (PCs) is associated with inferior survival in multiple myeloma (MM). Thus, characterization of the minor MRD subclone may represent a unique model to understand chemoresistance, but to our knowledge, the phenotypic and genetic features of the MRD subclone have never been investigated. Here, we compared the antigenic profile of MRD vs diagnostic clonal PCs in 40 elderly MM patients enrolled in the GEM2010MAS65 study and showed that the MRD subclone is enriched in cells overexpressing integrins (CD11a/CD11c/CD29/CD49d/CD49e), chemokine receptors (CXCR4), and adhesion molecules (CD44/CD54). Genetic profiling of MRD vs diagnostic PCs was performed in 12 patients; 3 of them showed identical copy number alterations (CNAs), in another 3 cases, MRD clonal PCs displayed all genetic alterations detected at diagnosis plus additional CNAs that emerged at the MRD stage, whereas in the remaining 6 patients, there were CNAs present at diagnosis that were undetectable in MRD clonal PCs, but also a selected number of genetic alterations that became apparent only at the MRD stage. The MRD subclone showed significant downregulation of genes related to protein processing in endoplasmic reticulum, as well as novel deregulated genes such as ALCAM that is prognostically relevant in MM and may identify chemoresistant PCs in vitro. Altogether, our results suggest that therapy-induced clonal selection could be already present at the MRD stage, where chemoresistant PCs show a singular phenotypic signature that may result from the persistence of clones with different genetic and gene expression profiles. This trial was registered at www.clinicaltrials.gov as #NCT01237249.
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    International Myeloma Working Group risk stratification model for smoldering multiple myeloma (SMM)
    (2020) Gonzalez-Calle, V. (Veronica); Durie, B. (B.); Hansson, M. (Markus); Ukropec, J. (Jon); Usmani, S.Z. (Saad Z.); Merlini, G. (G.); Zamagni, E. (Elena); Min, C.K. (Chang-Ki); Qi, M. (Ming); Ludwig, H. (Heinz); Hajek, R. (R.); Mateos, M.V. (María Victoria); De-Larrea, C.F. (Carlos Fernández); Esteves, G. (Graça); Kumar, S. (Shaji); Gozzetti, A. (A.); Morgan, G.J. (Gareth J.); Geraldes, C. (Catarina); Kyriakou, C. (Charalampia); Goldschmidt, H. (Hartmut); Kim, B.S. (Byung-Su); Dimopoulos, M.A. (Meletios A.); Kastritis, E. (Efstathios); Weiss, B.M. (Brendan M.); Fantl, D. (Dorotea); Rajkumar, S.V. (S. Vincent); San-Miguel, J.F. (Jesús F.); Leleu, X. (Xavier); Garderet, L. (Laurent)
    Smoldering multiple myeloma (SMM) is an asymptomatic precursor state of multiple myeloma (MM). Recently, MM was redefined to include biomarkers predicting a high risk of progression from SMM, thus necessitating a redefinition of SMM and its risk stratification. We assembled a large cohort of SMM patients meeting the revised IMWG criteria to develop a new risk stratification system. We included 1996 patients, and using stepwise selection and multivariable analysis, we identified three independent factors predicting progression risk at 2 years: serum M-protein >2 g/dL (HR: 2.1), involved to uninvolved free light-chain ratio >20 (HR: 2.7), and marrow plasma cell infiltration >20% (HR: 2.4). This translates into 3 categories with increasing 2-year progression risk: 6% for low risk (38%; no risk factors, HR: 1); 18% for intermediate risk (33%; 1 factor; HR: 3.0), and 44% for high risk (29%; 2–3 factors). Addition of cytogenetic abnormalities (t(4;14), t(14;16), +1q, and/or del13q) allowed separation into 4 groups (low risk with 0, low intermediate risk with 1, intermediate risk with 2, and high risk with ≥3 risk factors) with 6, 23, 46, and 63% risk of progression in 2 years, respectively. The 2/20/20 risk stratification model can be easily implemented to identify high-risk SMM for clinical research and routine practice and will be widely applicable.