Phage display

The phage display technology uses bacteriophages, which link the genetic information to various combinatorial libraries expressed on their surface. These libraries may be composed of peptides, antibodies, Fab fragments or other scaffolds.

Phage display

Frederick Twort Phage in action on cultured Bacillus anthracis. A Georgian, George Eliavawas making similar discoveries. Phage therapy is used in Russia, Georgia and Poland. In Russia, extensive research and development soon began in this field.

In the United States during the s commercialization of phage therapy was undertaken by Eli Lilly and Company. While knowledge was being accumulated regarding the Phage display of phages and how to use phage cocktails correctly, early uses of phage therapy were often unreliable.

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The drug proved to be extraordinarily effective in the treatment of injured Allied soldiers whose wounds had become infected. Bylarge-scale production of Penicillin had been made possible, and in it became publicly available in pharmacies.

Phage display

Due to Phage display drug's success, it was marketed widely in the U. During World War IIthe Soviet Union used bacteriophages to treat many soldiers infected with various bacterial diseases e. Russian researchers continued to develop and to refine their treatments and to publish their research and results.

However, due to the scientific barriers of the Cold Warthis knowledge was not translated and did not proliferate across the world. Phage therapy is today a widespread form of treatment in that region. Phages have been investigated as a potential means to eliminate pathogens like Campylobacter in raw food [23] and Listeria in fresh food or to reduce food spoilage bacteria.

The oldest use was, however, in human medicine. Phages have been used against diarrheal diseases caused by E. Recently the phage therapy approach has been applied to systemic and even intracellular infections and the addition of non-replicating phage and isolated phage enzymes like lysins to the antimicrobial arsenal.

However, actual proof for the efficacy of these phage approaches in the field or the hospital is not available. This could be used as an alternative to antibiotics when bacteria develops resistance.

Change drug discovery

Superbugs that are immune to multiple types of drugs are becoming a concern with the more frequent use of antibiotics. Phages can target these dangerous microbes without harming human cells due to how specific they are. Bacteriophage treatment offers a possible alternative to conventional antibiotic treatments for bacterial infection.

The species and strain specificity of bacteriophages makes it unlikely that harmless or useful bacteria will be killed when fighting an infection.

Purified recombinant phage enzymes can be used as separate antibacterial agents in their own right. This could assist with decline of coral around the world.


If the bacteria die, as usually happens, the mixture is centrifuged; the phages collect on the top of the mixture and can be drawn off. The phage solutions are then tested to see which ones show growth suppression effects lysogeny or destruction lysis of the target bacteria.

The phage showing lysis are then amplified on cultures of the target bacteria, passed through a filter to remove all but the phages, then distributed.

Treatment[ edit ] Phages are "bacterium-specific" and it is therefore necessary in many cases to take a swab from the patient and culture it prior to treatment.

Occasionally, isolation of therapeutic phages can require a few months to complete, but clinics generally keep supplies of phage cocktails for the most common bacterial strains in a geographical area.

Phage cocktails are sold in pharmacies in eastern countries. Injection is rarely used, avoiding any risks of trace chemical contaminants that may be present from the bacteria amplification stage, and recognizing that the immune system naturally fights against viruses introduced into the bloodstream or lymphatic system.

Reviews of phage therapy indicate that more clinical and microbiological research is needed to meet current standards. Please integrate the section's contents into the article as a whole, or rewrite the material.Since its introduction almost 20 years ago, phage display technology has revolutionized approaches to the analysis of biomedical problems, quickly impacting the fields of immunology, cell biology, biotechnology, pharmacology, and drug discovery.

Phage display library of random peptides with N-terminal affinity tag for immobilization of phage before protease exposure or for separation of protease resistant phage from solution is commonly used.

Thank you for your interest in pComb 3, the World’s First Antibody Fab Fragments Displayed on Phage. If you would like to receive training in phage display of antibody and peptide libraries, a Cold Spring Harbor Laboratory course on the subject occurs every fall.

Description of phage display I think that it is wrong to say that phage display is a method to study (protein/protein or protein/DNA) interactions. I would say that it is a method for selecting for a particular protein or peptide phenotype while maintaining the link for the genotype. Compare prices, print coupons and get patient assistance and savings tips for Glucophage (Metformin) and other Diabetes Type 2 drugs at CVS, Walgreens, and other pharmacies.

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