Abstract:
A method of altering cells comprising culturing them in a growth factor gradient, wherein said gradient is provided by a polyhedra delivery system (PODS) that releases the growth factor to set up the gradient.
Abstract:
A method for producing a eukaryotic production cell line expressing a protein of interest (POI), comprising a) incorporating a gene of interest (GOI) encoding said POI into the chromosome of a eukaryotic host cell within an exogenous euchromatin protein expression locus by transfection, thereby obtaining a repertoire of recombinant host cells in a pool; b) selecting a single cell from said pool within 12 days after transfection, wherein selecting is at least according to the expression of said GOI or a marker indicating said expression; and c) isolating and expanding the selected single cell, thereby obtaining the production cell line.
Abstract:
The present invention may be included in the field of biotechnology and it covers the improved production of recombinant proteins in insect cells or insect larvae as biofactories by a novel expression cassette. This expression cassette comprises nucleic acid sequences such as promoters, homologous regions ( hr ) as enhancers, and sequences encoding transcriptional regulators, for example, the baculovirus Ac-ie-01 cDNA, or any combination thereof, which are able to increase the quality and production efficiency of the recombinant proteins. Moreover, the present invention is also directed to the vectors themselves comprising the above mentioned nucleic acid sequences of the invention, cells or insects infected, transformed or transfected with those sequences or vectors, and methods for producing the recombinant proteins by using the aforesaid sequences, vectors, cells or insects.
Abstract:
Reagents and methods are provided that allow for an improved expression of a recombinant protein in an insect. More specifically, the introduction of recombinant DNA elements into an insect larva allows for the increased expression of a recombinant protein, an improvement of the correct folding of said protein and an increase in the survival rate after infection of the insect These recombinant DNA elements can be introduced, for example, into insect larvae via a recombinant baculovirus, which has incorporated said elements. The recombinant DNA elements include nucleic acids encoding transcriptional regulators, such as IE-0 and IE-1, transcriptional enhancer elements, such as the homologous region (hr) and promoters.
Abstract:
The present invention relates to an optimized baculovirus construct useful for the production of virus (-like) particles or viral vectors, in particular viral vectors for gene therapy.
Abstract:
The present invention relates to a construct for expressing rotavirus complex antigens having heterologous virus antigen epitopes, to a vaccine composition comprising the rotavirus complex antigens, to rotavirus-like particles comprising the rotavirus complex antigens, and to a vaccine composition comprising the rotavirus-like particles. According to the present invention, complex antigens comprising both the rotavirus antigens and epitopes of heterologous viruses different from the rotaviruses, and rotavirus-like particles comprising the complex antigens can be mass-produced at low costs. The method of the present invention can be applied to the study and development of novel complex vaccines against rotaviruses and heterologous viruses.