The present disclosure relates to a composition for preventing, alleviating, or treating an inflammatory disease of the digestive system, particularly, colitis, comprising a reovirus or a variant thereof as an active ingredient.

The invention provides for modified reovirus nucleic acid sequences and modified reovirus polypeptide sequences as well as reoviruses containing such modified nucleic acid or polypeptide sequences. The invention also provides for pharmaceutical compositions that include reoviruses having a modified sequence as well as methods of making and using such reoviruses.

Provided are a pharmaceutical composition including reovirus or reovirus-treated biological sample as an active ingredient for prevention or treatment of cancer, and a method for prevention or treatment of cancer using same. In addition, provided are a combination use of the pharmaceutical composition and an immune checkpoint inhibitor for treatment of cancer.

The present disclosure provides modified reovirus with improved characteristics, including improved oncolytic activity. Reoviruses provided herein include resortant viruses as well as viruses expressing mutated proteins. Methods of using such modified reovirus for inducing cancer cell lysis as well as treatment of cancer are disclosed. Also provided are methods tailored for induction of a desired cytokine profile in conjunction with, e.g., methods of inducing cancer cell oncolysis.

The invention provides for modified reovirus nucleic acid sequences and modified reovirus polypeptide sequences as well as reoviruses containing such modified nucleic acid or polypeptide sequences. The invention also provides for pharmaceutical compositions that include reoviruses having a modified sequence as well as methods of making and using such reoviruses.

Compositions and methods are provided that relate to an attenuated reovirus exhibiting oncolytic activity toward cancer cells while displaying reduced lytic activity toward non-malignant cells. Exemplified is an attenuated human reovirus derived from persistently infected fibrosarcoma cells that lacks wild-type reovirus S1 and S4 genes and consequently lacks a detectable reoviral outer capsid .sigma.1 protein and expresses a mutated reoviral outer capsid .sigma.3 protein.

The present invention relates to methods and compositions for use in inducing tumor-specific antibody mediated complement-dependent cytotoxic response in an animal having a tumor comprising administering to said animal a composition comprising a replication competent oncolytic virus wherein administration of the composition induces in the animal production of antibodies that mediate a CDC response specific to said tumor.

Compositions and methods are provided that relate to an attenuated reovirus exhibiting oncolytic activity toward cancer cells while displaying reduced lytic activity toward non-malignant cells. Exemplified is an attenuated human reovirus derived from persistently infected fibrosarcoma cells that lacks wild-type reovirus S1 and S4 genes and consequently lacks a detectable reoviral outer capsid 1 protein and expresses a mutated reoviral outer capsid 3 protein.

The invention provides for modified reovirus nucleic acid sequences and modified reovirus polypeptide sequences as well as reoviruses containing such modified nucleic acid or polypeptide sequences. The invention also provides for pharmaceutical compositions that include reoviruses having a modified sequence as well as methods of making and using such reoviruses.

Provided herein, in various embodiments, are mammalian cells (e.g., immune effector cells) comprising a nucleotide sequence encoding an exogenous fusogen. Also provided herein, in various embodiments, are methods of treating cancer in a subject in need thereof, comprising administering to the subject mammalian cells (e.g., immune effector cells) disclosed herein. Also provided herein, in various embodiments, are methods of killing a cancer cell, comprising contacting the cancer cell with mammalian cells (e.g., immune effector cells) disclosed herein.