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Review
. 2012 Jan 10:9:9.
doi: 10.1186/1743-422X-9-9.

Bacteriophages and their implications on future biotechnology: a review

Affiliations
Review

Bacteriophages and their implications on future biotechnology: a review

Irshad Ul Haq et al. Virol J. .

Abstract

Recently it has been recognized that bacteriophages, the natural predators of bacteria can be used efficiently in modern biotechnology. They have been proposed as alternatives to antibiotics for many antibiotic resistant bacterial strains. Phages can be used as biocontrol agents in agriculture and petroleum industry. Moreover phages are used as vehicles for vaccines both DNA and protein, for the detection of pathogenic bacterial strain, as display system for many proteins and antibodies. Bacteriophages are diverse group of viruses which are easily manipulated and therefore they have potential uses in biotechnology, research, and therapeutics. The aim of this review article is to enable the wide range of researchers, scientists, and biotechnologist who are putting phages into practice, to accelerate the progress and development in the field of biotechnology.

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Figures

Figure 1
Figure 1
Some methods that are used to fuse foreign peptides to the surface of phage. Foreign peptides can be displayed on more than one phage coat proteins. Smaller foreign peptides are displayed in more numbers but it also depends on the type of antigen, coat protein and the phage. (a) The gene for a foreign peptide is directly fused to the minor coat-protein gene. The foreign antigen is displayed by all minor coat proteins. (b) Foreign peptide gene is attached to major coat protein gene while another copy of the gene (major coat proteins) is also present. Foreign protein is displayed on some major coat proteins. (c) Cells containing a phagemid (plasmid that have both plasmid and bacteriophage origin of replication) are infected with unchanged helper phage which then expresses the foreign peptide or protein. Foreign antigens are displayed by some coat proteins.
Figure 2
Figure 2
Some examples of methods for vaccines delivery via phages. (a) Host could be inoculated for phage-delivered protein vaccine. (b) As in (a) host is inoculated for phage-delivered protein vaccine but the protective antigen is expressed as prokaryotic coat protein fusion. (c) Inoculation of host for phage mediated DNA vaccination. (d) Host can be inoculated for hybrid phage vaccination, where in one construct protein and DNA vaccines are delivered through phage. (e) Host inoculation for standard DNA vaccination.

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