Impact of MiRSNPs on Survival and Progression in Patients with Multiple Myeloma Undergoing Autologous Stem Cell Transplantation

• Published in: Clinical cancer research Vol. 18; no. 13; pp. 3697 - 3704
• Main Authors: DE LARREA, Carlos Fernández, NAVARRO, Alfons, MONZO, Mariano, BLADE, Joan, TEJERO, Rut, TOVAR, Natalia, DIAZ, Tania, TERESA CIBEIRA, Maria, ROSINOL, Laura, FERRER, Gerardo, ROVIRA, Montserrat, ROZMAN, Maria
• Format: Journal Article
• Language: English
• Published: Philadelphia, PA American Association for Cancer Research 01.07.2012
• Subjects: 3' Untranslated Regions; Adult; Aged; Antineoplastic agents; Biological and medical sciences; Cell Line, Tumor; Cell Proliferation; Disease-Free Survival; Female; Genetic Association Studies; Hematologic and hematopoietic diseases; Humans; Immunodeficiencies. Immunoglobulinopathies; Immunoglobulinopathies; Immunopathology; Kaplan-Meier Estimate; Karyopherins - genetics; Karyopherins - metabolism; Keratins, Hair-Specific - genetics; Keratins, Hair-Specific - metabolism; Keratins, Type II - genetics; Keratins, Type II - metabolism; Leukemias. Malignant lymphomas. Malignant reticulosis. Myelofibrosis; Lymphocytes - metabolism; Male; Medical sciences; MicroRNAs - genetics; MicroRNAs - metabolism; Middle Aged; Multiple Myeloma - genetics; Multiple Myeloma - mortality; Multiple Myeloma - therapy; Multivariate Analysis; Pharmacology. Drug treatments; Polymorphism, Single Nucleotide; Prognosis; Protein Biosynthesis; Sequence Analysis, DNA; Stem Cell Transplantation; Transplantation, Autologous; Human; Immunopathology; Immunoglobulinopathy; Lymphoproliferative syndrome; Stem cell; Autologous hematopoietic stem cell transplantation; Hematopoietic cell; Patient; Malignant hemopathy; Myeloma; Survival; Cancer
• ISSN: 1078-0432; 1557-3265
• DOI: 10.1158/1078-0432.CCR-12-0191

A distinctive new group of polymorphisms is constituted by single-nucleotide polymorphism (SNP) in miRNA processing machinery in miRNA precursor molecules and in miRNA-binding sites, known as miRSNPs. The aim of this study was to ascertain the prognostic impact of six miRSNPs in patients with multiple myeloma and analyze the functional consequences. One hundred and thirty-seven patients with chemosensitive multiple myeloma (73M/64F) intensified with autologous stem cell transplantation (ASCT) were studied. The median follow-up was 4 years. The genes and SNPs evaluated in genomic DNA by allelic discrimination were KRT81 (rs3660), AFF1 (rs17703261), FAM179b (rs1053667), and MIR196A2 (rs11614913) for miRNA target genes and TRBP (rs784567) and XPO5 (rs11077) for miRNA biogenesis pathway. Overall survival (OS) was significantly longer in patients with KRT81 rs3660 C/C variant (P = 0.037). Functional analysis showed that the presence of C variant in KRT81 3' untranslated region (UTR) is related with a reduction of the protein levels. Moreover, the reduction of KRT81 protein levels by siRNA in multiple myeloma cell lines is related to a decreased proliferation. On the other hand, OS was significantly longer in patients with C/C or A/C variant in XPO5 rs11077 (P = 0.012). There was also a significantly longer progression-free survival (PFS) for this SNP (P = 0.013). This SNP retained its prognostic impact on PFS and OS in a multivariate regression analysis (P = 0.028 and P = 0.014, respectively). This is the first report that relates miRSNPs with prognosis in multiple myeloma either in a keratin gene (KRT81), target of diverse miRNA multiple myeloma clusters, or in the miRNA biogenesis pathway-related protein exportin-5.