A non-natural modified CMV promoter is provided. Such a promoter can include a promoter nucleotide sequence that is at least 80% homologous to a sequence selected from the group consisting of SEQ ID 01, SEQ ID 02, SEQ ID 03, SEQ ID 04, SEQ ID 05, SEQ ID 06, SEQ ID 07, and compliments thereof.

The present invention provides an effective vaccine for Marek's disease, which may be prepared using a recombinant Marek's Disease Virus (MDV), strain CVI988, having been transformed with a foreign DNA construct that includes a long terminal repeat sequence of a reticuloendotheliosis virus. This safe viral agent elicits a highly protective immune response in a chicken against virulent MDV challenge without causing a significant degree of pathogenicity. Suitable formulations of the vaccine for use in chickens include an effective immunization dosage of this novel viral agent, along with a pharmaceutically acceptable carrier or diluent.

An adenovirus comprising a sequence of formula (I): 5ITR-B.sub.1-B.sub.A-B.sub.2-B.sub.X-B.sub.B-B.sub.Y-B.sub.3-3ITR (I) wherein B.sub.Y comprises a transgene cassette containing four transgenes, said genes encoding a FAP-Bispecific T cell activator, CXCL10, CXCL9, and IFN. The disclosure also extends to pharmaceutical composition comprising the virus, and use of the virus or formulation in treatment

A modified adenovirus, in particular Enadenotucirev (EnAd), armed with a bispecific T cell engager (BiTE?) comprising at least two binding domains, wherein at least one of the domains is specific for a surface antigen on a T-cell of interest. Also provided are a composition, such as a pharmaceutical formulation comprising the virus, use of the virus and virus formulations for treatment, such as in the treatment of cancer. The disclosure also extends to processes for preparing the virus.

The current invention reports a promoter that has the nucleic acid sequence of SEQ ID NO: 02 or SEQ ID NO: 03 which is a human CMV major immediate-early (hCMV-MIE) promoter/enhancer with C to G point mutation at position 41 and/or 179 relative to the transcription start site. This new promoter is especially useful for the production of polypeptides at large scale as it shows reduced promoter silencing and improved polypeptide production.

Recombinant expression vectors are disclosed that include a control sequence for recombinant expression of proteins of interest; the control sequence combines a mCMV enhancer sequence with a rat EF-1alpha intron sequence. Some of the vectors are useful for tetracycline-inducible expression. Some of the vectors contain a 5 PiggyBac ITR and a 3 PiggyBac ITR to promote genomic integration into a host cell chromosome. A method of selecting a stable production cell line for manufacturing a protein of interest is also disclosed. Also disclosed are mammalian host cells comprising the inventive recombinant expression vectors and a method of producing a protein of interest, in vitro, involving the mammalian host cell.

The present invention regards a new and Improved HVT-vectored ND-IBD vaccine, comprising a recombinant HVT comprising the VP2 gene from IBDV and the F gene from NDV to a target animal. The recombinant HVT can be used in a vaccine for poultry, which displayed good viral vector replication, effective expression of the NDV F- and IBDV VP2 genes, improved immunoprotection against ND and IBD, and improved genetic stability over prior art constructs.

The invention provides improved compositions for adoptive T cell therapies for B cell related conditions.

The application describes ceDNA vectors having linear and continuous structure for delivery and expression of a transgene. ceDNA vectors comprise an expression cassette flanked by two ITR sequences, where the expression cassette encodes a transgene, e.g., selected from Table 1, encoding a PFIC therapeutic protein (e.g., ATP8B1, ABCB11, ABCB4 or TJP2). Some ceDNA vectors further comprise cis-regulatory elements, including regulatory switches. Further provided herein are methods and cell lines for reliable gene expression of PFIC therapeutic protein in vitro, exvivo and in vivo using the ceDNA vectors. Provided herein are method and compositions comprising ceDNA vectors useful for the expression of PFIC therapeutic protein in a cell, tissue or subject, and methods of treatment of diseases with said ceDNA vectors expressing PFIC therapeutic protein. Such PFIC therapeutic protein can be expressed for treating a subject with Progressive familial intrahepatic cholestasis (PFIC).

Provided is an expression vector having an improved ability to express a gene. Also provided are cells transformed by the expression vector and a method for mass-producing a target protein by using the cells. The expression vector contains a simian virus 40 promoter, a scaffold attachment region or matrix attachment region element, and a chimeric intron. The vector shows an improved ability to express a gene, and thus, can attain a significantly increased expression of a heterogeneous gene.