The present disclosure relates to genetically modified arenaviruses suitable for the treatment of neoplastic diseases, such as
cancer. The arenaviruses described herein may be suitable for treatment of neoplastic diseases and / or for the use in immunotherapies. In particular, provided herein are methods and compositions for treating a
neoplastic disease by administering a genetically modified
arenavirus, wherein the
arenavirus has been engineered to include a
nucleotide sequence encoding one or more antigenic fragment(s) of one or more
cancer testis antigens (CTAs), including members of the
melanoma-associated
antigen (MAGE) family and preferentially expressed
antigen in
melanoma (
PRAME). Specifically, provided herein is a genetically modified
arenavirus, wherein the arenavirus has been engineered to include a
nucleotide sequence encoding
antigen fragments and / or epitopes of
PRAME, MAGE-A3, MAGE-A4 and MAGE-A6.