This invention relates to oncolytic viruses which are more resistant to neutralization and phagocytosis by immune systems, and methods for their preparation and treatment of disorders and diseases (such as cancer) with them. Described herein is an oncolytic Herpes Simplex Virus Type 1 (HSV-1) or Herpes Simplex Virus Type 2 (HSV-2) treated in immune sera that contain a high level of anti-HSV antibodies. In one preferred embodiment, the oncolytic virus includes an extracellular CD47 domain inserted into the N-terminus of a glycoprotein in order to inhibit phagocyte activity. The oncolytic virus is suitable for systemic administration for the treatment of cancer.

The present disclosure provides a method to prepare purified enveloped viral particle preparations employing ion exchange chromatography and tangential flow filtration.

The present invention provides compositions for treating or preventing cancer and methods of using and making the compositions. The compositions comprise herpes simplex viruses comprising recombinant herpes simplex virus genomes. Further provided are recombinant herpes simplex virus genomes, viruses comprising the recombinant herpes simplex virus genomes, and cancer vaccines and other compositions comprising the viruses.

The present disclosure provides a method to prepare purified enveloped viral particle preparations employing ion exchange chromatography and tangential flow filtration.

Methods and compositions for increasing the production of recombinant proteins by introducing ICP0 to cells capable of producing a recombinant protein are encompassed. In one method, the recombinant protein is a protein that is required for the replication of a replication defective virus, wherein the recombinant protein is provided to the replication defective virus in trans.

Methods and compositions for increasing the production of recombinant proteins by introducing ICP0 to cells capable of producing a recombinant protein are encompassed. In one method, the recombinant protein is a protein that is required for the replication of a replication defective virus, wherein the recombinant protein is provided to the replication defective virus in trans.

The present invention concerns a method for production of an active ingredient of a drug or diagnostic agent, in which (a) MDCK cells are infected with a virus; and (b) the MDCK cells are cultured in suspension culture on a commercial scale under conditions that permit multiplication of the viruses; in which culturing occurs in a volume of at least 30 L. The invention also concerns a method for production of a drug or diagnostic agent in which an active ingredient is produced according to the above method and mixed with an appropriate adjuvant, auxiliary, buffer, diluent or drug carrier.

A recombinant lytic virus transcriptionally targeted against malignant cells. A promoter for a viral gene controlling replication is replaced with a promoter for a malignant factor such that the promoter for the malignant factor controls expression of the viral gene controlling replication. Accordingly, the recombinant lytic virus of the present invention only replicates within and kills cells expressing the malignant factor. In an embodiment, the recombinant lytic virus is a recombinant herpes simplex virus, and the viral gene controlling replication is a herpes alpha gene. In an embodiment, the recombinant lytic virus is transcriptionally targeted against cancer stem cells (CSCs). In an embodiment, the recombinant lytic virus is a recombinant herpes simplex virus-1 (HSV-1) with the promoter of CD133 controlling the expression of infected cell protein-4 (ICP4). In another embodiment, the recombinant lytic virus is a recombinant HSV-1 with the promoter of Ezh2 controlling the expression of ICP4.

A method of preserving the one or more chemical and/or biological species in a polymer matrix comprising pullulan and trehalose is described. The method includes combining the one or more chemical and/or biological species, an aqueous pullulan and a trehalose solution and drying the resultant mixture to provide a solid polymeric matrix. A polymeric matrix comprising one or more chemical and/or biological species and its use, for example, on surfaces for food preparation, for food preservation and in biological preparations is also described.

Methods and compositions for increasing the production of recombinant proteins by introducing ICP0 to cells capable of producing a recombinant protein are encompassed. In one method, the recombinant protein is a protein that is required for the replication of a replication defective virus, wherein the recombinant protein is provided to the replication defective virus in trans.