The problem of quickly producing a certain amount of protein for further characterization and study is a major bottleneck in several areas of the life sciences and the related bioindustry. The list of sequenced genes for which the function of the corresponding protein is poorly understood is long. In addition, it is fairly easy to mutate genes in vitro, so a variety of new proteins can be encoded, some of which might have considerable therapeutic value. In contrast to the quick generation of new genes, the establishing of a stable recombinant production cell line requires at least a year for transfection, screening/amplification and scale up due to the difficulties of inserting the gene stably into a transcriptionally active region of the cell's chromosomal DNA. Recently, a much faster method -transient transfection - has been discussed as a means to produce quickly (within days) milligrams of a given protein. In this case, the foreign DNA is not inserted into the genome of the cell. The method, which until recently was only used for the production of smaller amounts of proteins through-out, had been shown to be compatible with at least the 1 L scale. If transfections could be established at the 100 liter scale or more, gram amounts of any protein could be produced within days. Screening of putative biopharmaceuticals but also basic research would profit enormously. Such large-scale transfections have not yet been achieved.
Gene therapy is another domain where efficient transfer of genes is essential. Many severe human diseases are caused by a genetic defect leading to the mal- or over-/ under-expression of the corresponding protein. Patients could be permanently cured if the missing genes could be transferred in a functional form into the concerned organs. Delivery of genes to specific tissues could become the most efficient medical treatment in the future, but for obvious reasons, the establishment of a very safe and well-controlled method for gene delivery is imperative.
Tags: Bio Technology, Bio Genetics, Gene Delivery
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