CAS Exosomes were isolated from 250 μL of blood and 10 mL of cell supernatant respectively using ExoQuick solutions [System Biosciences – SBI, Palo Alto, California, US] and ExoQuick-TC™ [System Biosciences], according to the manufacturer’s protocol. 1. 2013;27:2. MM-released exosomes express the immunoglobulin B-cell receptor (Ig-BCR) of the tumor B-cells, which can be targeted by Idiotype-binding peptides (Id-peptides). Tumor-derived exosomes and paraprotein levels in peripheral blood were monitored every 7 days up to 35 days post-inoculation, In vitro binding of selected Id-peptides to the 5T33MM-Ig. As controls, the FITC-conjugated p5 peptide did not detect the exosomes released from the human IM9 multiple myeloma and murine A20 B-lymphoma cells (Fig. The size of the exosomes-functionalized SMNPs (9.1 μm of diameter) supported the use of flow cytometric detection. 2013;14(8):793–803. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. Taddlr ha fatto una lista dei 35 attori più, Un sacco di celebrità non sa più cosa fare con i propri soldi. 3c). designed and conducted the research, analyzed the data, and wrote the manuscript; S.M. Google Scholar. Molecular Cancer Google Scholar. California Privacy Statement, The p5 peptide bound to the 5T33MM cell surface and also localized inside the cells (Fig. Based on the highest affinity binding to 5T33MM Igs, the insert amino acid sequence of phage clone 5 (CIGNSNTLC) was used for large-scale synthesis of the p5 peptide in order to evaluate the binding properties outside of the phage context. E, Chi è l’attore più ricco di Hollywood? Indeed, recent evidence demonstrated the utility of microvesicles in detecting relapse weeks before existing clinical tests, highlighting the sensitivity and capacity for microvesicles in monitoring disease progression and minimal residual disease in myeloma patients [6]. Interessante. Department of Experimental and Clinical Medicine, University of Catanzaro “Magna Graecia,”, Catanzaro, Italy, Enrico Iaccino, Selena Mimmi, Vincenzo Dattilo, Fabiola Marino, Patrizio Candeloro, Antonio Di Loria, Antonio Pisano, Francesco Albano, Eleonora Vecchio, Simona Ceglia, Gaetanina Golino, Antonio Lupia, Giuseppe Fiume, Ileana Quinto & Giuseppe Scala, Stem Cell and Cellular Therapy Laboratory, G. Gaslini Institute, Genoa, Italy, You can also search for this author in The Igs secreted by 5T33MM cells were purified from cell supernatant using Protein G affinity chromatography, and used as bait to isolate phage ligands from the C7C phage-displayed peptide library fused to the M13 minor coat protein. All subsequent washing and incubations were carried out in the same buffer on ice. © 2020 BioMed Central Ltd unless otherwise stated. A total number of 10 mice per group were respectively injected with 106 cells of 5T33MM multiple myeloma cells or A20 B-lymphoma cells. 3a). c Flow cytometric analysis of Red-Exo-stained exosomes derived from serum of a representative 5T33MM-engrafted mouse incubated with FITC-conjugated p5 peptide. Proteins were resolved by SDS-PAGE (SDS-polyacrylamide gel electrophoresis), transferred to poly-vinylidene fluoride membranes, blocked with 5% non-fat powdered milk in PBS-T (0.5% Tween-20) and probed with anti-mouse CD63, anti- mouse CD81, or anti-mouse IgG antibodies. Exosomes are vesicles of 30–130 nm in diameter released by different cell types and detectable in all biological fluids [7] and supernatants of cultured cells [8]. CAS Colombo M, Raposo G, Théry C. Annu Rev Cell Dev Biol. Cultured 5T33MM, A20 and IM9 cells as well as primary B cells from MM patient and healthy donor were washed and suspended at the density of 106 cells/ml in FACs Flow Buffer [BD Biosciences]. a Kaplan-Meier survival curves in 5T33MM-engrafted mice (n = 10), A20-engrafted mice (n = 10) and un-grafted control mice (n = 10). c Representative confocal images of 5T33MM cells labeled with FITC-conjugated p5 peptide (green), stained with the APC-conjugated anti-mouse IgG antibody (white), and DAPI (blue). Our experimental approach could open new avenues in devising lab-on-a-chip platforms and liquid biopsy options for an effective early detection of TDEs shed into the blood by tumor B-cells. 2011;110:19–42. Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Chiudendo questo banner, scrollando la pagina acconsenti all'uso dei cookie. Multiple myeloma (MM) is a clonal B-cell malignancy accounting for more than 10% of hematologic cancers, and is characterized by the aberrant expansion of bone marrow plasma cells releasing a high level of monoclonal immunoglobulin (mIg) in the blood, so called paraprotein [1]. 2014;30:255–89. 2017;241(4):534–46. La consegna delle Targhe Tenco e dei Premi Tenco andrà in onda in TV, Taylor Swift, venduti per 300 milioni di dollari i diritti dei primi sei album, Random conquista il platino con “Sono un brano ragazzo un po’ fuori di testa”, Gioia social per i Ferragnez dopo la nomina per l’Ambrogino D’Oro “Squadra bellissima”, Iva Zanicchi torna a casa “Grazie ai medici che mi hanno assistita”, Musictory allows YouTube to serve content, including advertisements. Dynamic light scattering and zeta potential determinations were performed with a Nano ZS 90 [Malvern Instruments], allowing the analysis of particles within the range of 1 nm up to 3 μm. By FACS, the FITC-conjugated Id-peptides detected the MM-released exosomes in the serum of 5T33MM-engrafted mice, levels of which are correlated with tumor progression at an earlier time point compared to serum paraprotein. Even if the mechanism of expression remains not completely defined, it is worthwhile that MM-released exosomes constitutively express on their surface the immunoglobulin of B-cell receptor (Ig-BCR) derived from the parental tumor B-cell, and thus they can be reliable tumor markers [17, 18]. Tuccillo FM, Palmieri C, Fiume G, de Laurentiis A, Schiavone M, Falcone C, Iaccino E, Galandrini R, Capuano C, Arra C, Barbieri A, Dal Piaz F, Venzon D, Bonelli P, Buonaguro FM, Scala I, Mallardo M, Quinto I, Scala G. Mol Cancer Ther.