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Remission of Disseminated Cancer After Systemic Oncolytic Virotherapy


      MV-NIS is an engineered measles virus that is selectively destructive to myeloma plasma cells and can be monitored by noninvasive radioiodine imaging of NIS gene expression. Two measles-seronegative patients with relapsing drug-refractory myeloma and multiple glucose-avid plasmacytomas were treated by intravenous infusion of 1011 TCID50 (50% tissue culture infectious dose) infectious units of MV-NIS. Both patients responded to therapy with M protein reduction and resolution of bone marrow plasmacytosis. Further, one patient experienced durable complete remission at all disease sites. Tumor targeting was clearly documented by NIS-mediated radioiodine uptake in virus-infected plasmacytomas. Toxicities resolved within the first week after therapy. Oncolytic viruses offer a promising new modality for the targeted infection and destruction of disseminated cancer.

      Abbreviations and Acronyms:

      ASCT (autologous stem cell transplant), Edm (Edmonston), FDG (fluorodeoxyglucose), GFP (green fluorescent protein), M-protein (monoclonal protein), MM (multiple myeloma), MV (measles virus), MV-NIS (measles virus encoding human sodium iodide symporter), NIS (sodium iodide symporter), OV (oncolytic virus), PET (Positron emission tomography), PRN (plaque reduction neutralization), SPECT (single-photon emission computed tomography), TCID50 (50% tissue culture infectious dose)
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