RNA interference (RNAi) has been suggested to represent a promising therapeutic approach in different disease settings. Primary effusion lymphoma (PEL) is a plasmablastic lymphoma consistently expressing B lymphocyte-induced maturation protein 1 (Blimp-1), a pivotal transcriptional regulator during terminal differentiation of B cells into plasma cells. Here we report, for the first time, that transient knockdown of the BLIMP1 gene (also known as PR Domain Containing 1 with ZNF Domain, or PRDM1) using small interfering RNA (siRNA) delivered by liposomes, induced remarkable killing in PEL cell lines. Furthermore, in a murine model of PEL, significantly prolonged survival was achieved by intraperitoneal treatment with such anti-BLIMP1 lipoplexes, while no vector-induced toxicity was observed. This effective and safe RNAi strategy, based on liposomal siRNA targeting a master transcription factor of post-germinal center B cells, may indeed be a potential treatment against plasmablastic lymphoma

Antineoplastic effects of liposomal siRNA treatment targeting BLIMP1/PRDM1 in primary effusion lymphoma / Riva, Giovanni; Lagreca, Ivana; Mattiolo, Adriana; Belletti, Daniela; Lignitto, Laura; Barozzi, Patrizia; Ruozi, Barbara; Vallerini, Daniela; Quadrelli, Chiara; Corradini, Giorgia; Forghieri, Fabio; Marasca, Roberto; Narni, Franco; Tosi, Giovanni; Forni, Flavio; Vandelli, Maria Angela; Amadori, Alberto; Chieco Bianchi, Luigi; Potenza, Leonardo; Calabro', Maria Luisa; Luppi, Mario. - In: HAEMATOLOGICA. - ISSN 0390-6078. - ELETTRONICO. - 100:11(2015), pp. 467-470.

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