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Characterization of JG024, a pseudomonas aeruginosa PB1-like broad host range phage under simulated infection conditions.

Garbe J, Wesche A, Bunk B, Kazmierczak M, Selezska K, Rohde C, Sikorski J, Rohde M, Jahn D, Schobert M - BMC Microbiol. (2010)

Bottom Line: The receptor of phage JG024 was determined as lipopolysaccharide.Alginate production was identified as a factor reducing phage infectivity.Phage JG024 is a suitable broad host range phage which could be used in phage therapy.

View Article: PubMed Central - HTML - PubMed

Affiliation: Institute of Microbiology, Technische Universit├Ąt Braunschweig, Spielmannstr, 7, 38106 Braunschweig, Germany.

ABSTRACT

Background: Pseudomonas aeruginosa causes lung infections in patients suffering from the genetic disorder Cystic Fibrosis (CF). Once a chronic lung infection is established, P. aeruginosa cannot be eradicated by antibiotic treatment. Phage therapy is an alternative to treat these chronic P. aeruginosa infections. However, little is known about the factors which influence phage infection of P. aeruginosa under infection conditions and suitable broad host range phages.

Results: We isolated and characterized a phage, named JG024, which infects a broad range of clinical and environmental P. aeruginosa strains. Sequencing of the phage genome revealed that the phage JG024 is highly related to the ubiquitous and conserved PB1-like phages. The receptor of phage JG024 was determined as lipopolysaccharide. We used an artificial sputum medium to study phage infection under conditions similar to a chronic lung infection. Alginate production was identified as a factor reducing phage infectivity.

Conclusions: Phage JG024 is a suitable broad host range phage which could be used in phage therapy. Phage infection experiments under simulated chronic lung infection conditions showed that alginate production reduces phage infection efficiency.

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Related in: MedlinePlus

Morphology of JG024. Electron microscopic image of negatively stained JG024 phages, which exhibit a contractile tail with a length of 130 nm. The icosahedral head of JG024 has a length of 80 nm and a width of 75 nm.
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Figure 1: Morphology of JG024. Electron microscopic image of negatively stained JG024 phages, which exhibit a contractile tail with a length of 130 nm. The icosahedral head of JG024 has a length of 80 nm and a width of 75 nm.

Mentions: Electron microscopy (Figure 1) shows an icosahedral head with a length of 80 nm and a width of 75 nm. The contractile tail, which consists of a neck, a contractile sheath and a central tube has a length of approximately 130 nm. Due to these morphological results and in accordance with the presence of dsDNA, the phage JG024 is grouped to the family Myoviridae. This family is a member of the order Caudovirales which contains exclusively tailed phages also from the families Siphoviridae and Podoviridae.


Characterization of JG024, a pseudomonas aeruginosa PB1-like broad host range phage under simulated infection conditions.

Garbe J, Wesche A, Bunk B, Kazmierczak M, Selezska K, Rohde C, Sikorski J, Rohde M, Jahn D, Schobert M - BMC Microbiol. (2010)

Morphology of JG024. Electron microscopic image of negatively stained JG024 phages, which exhibit a contractile tail with a length of 130 nm. The icosahedral head of JG024 has a length of 80 nm and a width of 75 nm.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3008698&req=5

Figure 1: Morphology of JG024. Electron microscopic image of negatively stained JG024 phages, which exhibit a contractile tail with a length of 130 nm. The icosahedral head of JG024 has a length of 80 nm and a width of 75 nm.
Mentions: Electron microscopy (Figure 1) shows an icosahedral head with a length of 80 nm and a width of 75 nm. The contractile tail, which consists of a neck, a contractile sheath and a central tube has a length of approximately 130 nm. Due to these morphological results and in accordance with the presence of dsDNA, the phage JG024 is grouped to the family Myoviridae. This family is a member of the order Caudovirales which contains exclusively tailed phages also from the families Siphoviridae and Podoviridae.

Bottom Line: The receptor of phage JG024 was determined as lipopolysaccharide.Alginate production was identified as a factor reducing phage infectivity.Phage JG024 is a suitable broad host range phage which could be used in phage therapy.

View Article: PubMed Central - HTML - PubMed

Affiliation: Institute of Microbiology, Technische Universit├Ąt Braunschweig, Spielmannstr, 7, 38106 Braunschweig, Germany.

ABSTRACT

Background: Pseudomonas aeruginosa causes lung infections in patients suffering from the genetic disorder Cystic Fibrosis (CF). Once a chronic lung infection is established, P. aeruginosa cannot be eradicated by antibiotic treatment. Phage therapy is an alternative to treat these chronic P. aeruginosa infections. However, little is known about the factors which influence phage infection of P. aeruginosa under infection conditions and suitable broad host range phages.

Results: We isolated and characterized a phage, named JG024, which infects a broad range of clinical and environmental P. aeruginosa strains. Sequencing of the phage genome revealed that the phage JG024 is highly related to the ubiquitous and conserved PB1-like phages. The receptor of phage JG024 was determined as lipopolysaccharide. We used an artificial sputum medium to study phage infection under conditions similar to a chronic lung infection. Alginate production was identified as a factor reducing phage infectivity.

Conclusions: Phage JG024 is a suitable broad host range phage which could be used in phage therapy. Phage infection experiments under simulated chronic lung infection conditions showed that alginate production reduces phage infection efficiency.

Show MeSH
Related in: MedlinePlus