Disclosed are compositions and methods for increasing virus production. In particular, disclosed herein are cell or cell line comprises reduced expression of one or more cellular genes selected from the group comprising COQ9, FGF2, NAT9, NDUFA9, NEU2, PLA2G1B, PYCR1, RAD51AP1, STRADA, SVOPL, and/or ZFYVE9 for use in increasing viral production.

The disclosure relates to oncolytic virus derived replicons and capsidation of the same. The disclosure also relates to the incorporation of one or more transgenes encoding payload molecules into the replicon. The disclosure further relates to the encapsulation of the replicon and/or recombinant RNA molecules encoding oncolytic viruses into particles and the use of the replicon and/or particles for the treatment and prevention of cancer.

Disclosed are compositions and methods for increasing virus production.

Provided herein are engineered cell lines. In some embodiments, cells of an engineered cell line have altered expression of a gene and/or altered expression of an miRNA, wherein the altered expression results in increased or decreased production of a virus. The virus is a picomavirus, such as a poliovirus or Enterovirus 71. Also provided herein are methods for using the engineered cells to produce virus, and methods for treating a subject having or at risk of having a viral infection.