Engineered enzymatically active bacteriophages and methods of uses thereof
View Patent ↗The present invention provides engineered bacteriophages that express at least one biofilm degrading enzyme on their surface and uses thereof for degrading bacterial biofilms. The invention also provides genetically engineered bacteriophages expressing the biofilm degrading enzymes and proteins necessary for the phage to replicate in different naturally occurring biofilm producing bacteria. The phages of the invention allow a method of biofilm degradation by the use of one or only a few administration of the phage because the system using these phages is self perpetuating, and capable of degrading biofilm even when the concentration of bacteria within the biofilm is low.
1. A method of degrading biofilm, comprising:
contacting the biofilm with a genetically engineered bacteriophage;
wherein the genetically engineered bacteriophage is self-replicating and capable of assembly upon infection of a target cell;
wherein the genetically engineered bacteriophage encodes i) a wild type bacteriophage capsid protein and ii) at least one fusion protein comprising a biofilm degrading enzyme attached to a bacteriophage capsid protein; and
wherein, the biofilm degrading enzyme is displayed on the surface of the bacteriophage.
2. The method of claim 1 , wherein the biofilm is a dual biofilm.
3. The method of claim 1 , wherein the biofilm is formed by more than one bacterial strain.
4. The method of claim 1 , wherein the bacteriophage is a lambda phage.
5. The method of claim 1 , wherein the bacteriophage is selected from T2, T3, T4, and T7.
6. The method of claim 5 , wherein the bacteriophage is T7.
7. The method of claim 6 , wherein the bacteriophage is T7 10-3b-genetically engineered to express 10A capsid protein as the wild type bacteriophage capsid protein.
8. The method of claim 1 , wherein the bacteriophage is Pf1.
9. The method of claim 1 , wherein the at least one enzyme is selected from a cellulase, a polyglucosamine (PGA) depolymerase, and a colonic acid depolymerase.
10. The method of claim 9 , wherein the cellulase is cellulase A.
11. The method of claim 9 , wherein the colonic acid depolymerase is selected from 1,4-L-fucodise hydrolase, depolymerizing alginase, and DNase I.
12. The method of claim 1 , wherein the biofilm is contacted with at least two different genetically engineered enzyme displaying bacteriophages.
13. The method of claim 12 , wherein the at least two different genetically engineered bacteriophages display different biofilm degrading enzymes on their surface.
14. The method of claim 12 , wherein the at least two different genetically engineered bacteriophages are obtained by genetic modification of different wild type phage strains.
15. The method of claim 1 , wherein the bacteriophage displays 1-20 enzyme copies on the bacteriophage capsid.
16. The method of claim 1 , wherein the bacteriophage displays 5-15 enzyme copies on the bacteriophage capsid.
17. The method of claim 1 , wherein the bacteriophage displays 20-500 enzyme copies on the bacteriophage capsid.
18. The method of claim 1 , wherein the bacteriophage further comprises all the essential genes for virus replication in the naturally occurring target bacterial strain.