Developmental Therapeutics Immunotherapy
DEVELOPMENTAL THERAPEUTICS—IMMUNOTHERAPY 2500 Oral Abstract Session Clinical activity of systemic VSV-IFNb-NIS oncolytic virotherapy in patients with relapsed refractory T-cell lymphoma. Joselle Cook, Kah Whye Peng, Susan Michelle Geyer, Brenda F. Ginos, Amylou C. Dueck, Nandakumar Packiriswamy, Lianwen Zhang, Beth Brunton, Baskar Balakrishnan, Thomas E. Witzig, Stephen M Broski, Mrinal Patnaik, Francis Buadi, Angela Dispenzieri, Morie A. Gertz, Leif P. Bergsagel, S. Vincent Rajkumar, Shaji Kumar, Stephen J. Russell, Martha Lacy; Mayo Clinic, Rochester, MN; The Ohio State University, Columbus, OH; Mayo Clinic, Scottsdale, AZ; Division of Hematology, Mayo Clinic, Roches- ter, MN; Vyriad and Mayo Clinic, Rochester, MN Background: Oncolytic virotherapy is a novel immunomodulatory therapeutic approach for relapsed re- fractory hematologic malignancies. The Indiana strain of Vesicular Stomatitis Virus was engineered to encode interferon beta (IFNb) and sodium iodine symporter (NIS) to produce VSV-IFNb-NIS. Virally en- coded IFNb serves as an index of viral proliferation and enhances host anti-tumor immunity. NIS was in- serted to noninvasively assess viral biodistribution using SPECT/PET imaging. We present the results of the phase 1 clinical trial NCT03017820 of systemic administration of VSV-IFNb-NIS among patients (pts) with relapsed refractory Multiple Myeloma (MM), T cell Lymphoma (TCL) and Acute myeloid Leu- 9 kemia (AML). Methods: VSV-IFNb-NIS was administered at 5x10 TCID50 (50% tissue culture infec- 11 tious dose) dose level 1 to dose level 4, 1.7x10 TCID50. The primary objective was to determine the maximum tolerated dose of VSV-IFNb-NIS as a single agent. Secondary objectives were determination of safety profile and preliminary efficacy of VSV-IFNb-NIS.
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