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Cao Yao JC, Garcia Cehic D, Quer J, Méndez JN, Gorrín AD, Hevia LG, Fernández MTT. Complete Genome Sequences of Four Mycobacteriophages Involved in Directed Evolution against Undisputed Mycobacterium abscessus Clinical Strains. Microorganisms 2024; 12:374. [PMID: 38399778 PMCID: PMC10893344 DOI: 10.3390/microorganisms12020374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/06/2024] [Accepted: 02/09/2024] [Indexed: 02/25/2024] Open
Abstract
Phage therapy is still in its infancy, but it is increasingly promising as a future alternative for treating antibiotic-resistant bacteria. To investigate the effect of phages on Mycobacterium abscessus complex (MABC), we isolated 113 environmental phages, grown them to high titres, and assayed them on MABC clinical strains through the spot test. Of all the phages, only 16 showed killing activity. Their activity was so temperate to MABC that they could not generate any plaque-forming units (PFUs). The Appelmans method of directed evolution was carried out to evolve these 16 phages into more lytic ones. After only 11 of 30 rounds of evolution, every single clinical strain in our collection, including those that were unsusceptible up to this point, could be lysed by at least one phage. The evolved phages were able to form PFUs on the clinical strains tested. Still, they are temperate at best and require further training. The genomes of one random parental phage and three random evolved phages from Round 13 were sequenced, revealing a diversity of clusters and genes of a variety of evolutionary origins, mostly of unknown function. These complete annotated genomes will be key for future molecular characterisations.
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Affiliation(s)
- Juan Carlos Cao Yao
- Department of Molecular Biology and Biomedicine, University of Cantabria, 39011 Santander, Spain (A.D.G.); (L.G.H.)
| | - Damir Garcia Cehic
- Liver Diseases-Viral Hepatitis, Liver Unit, Vall d’Hebron Institut de Recerca (VHIR), Vall d’Hebron Barcelona Hospital Campus, Hospital Universitari Vall d’Hebron, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain; (D.G.C.); (J.Q.)
| | - Josep Quer
- Liver Diseases-Viral Hepatitis, Liver Unit, Vall d’Hebron Institut de Recerca (VHIR), Vall d’Hebron Barcelona Hospital Campus, Hospital Universitari Vall d’Hebron, Passeig Vall d’Hebron 119-129, 08035 Barcelona, Spain; (D.G.C.); (J.Q.)
- CIBER de Enfermedades Hepáticas y Digestivas, Instituto de Salud Carlos III, 28029 Madrid, Spain
- Biochemistry and Molecular Biology Department, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Jesús Navas Méndez
- Department of Molecular Biology and Biomedicine, University of Cantabria, 39011 Santander, Spain (A.D.G.); (L.G.H.)
- Instituto de Investigación Valdecilla (IDIVAL), 39011 Santander, Spain
| | - Alexis Dorta Gorrín
- Department of Molecular Biology and Biomedicine, University of Cantabria, 39011 Santander, Spain (A.D.G.); (L.G.H.)
- Instituto de Investigación Valdecilla (IDIVAL), 39011 Santander, Spain
| | - Lorena García Hevia
- Department of Molecular Biology and Biomedicine, University of Cantabria, 39011 Santander, Spain (A.D.G.); (L.G.H.)
- Instituto de Investigación Valdecilla (IDIVAL), 39011 Santander, Spain
| | - María Teresa Tórtola Fernández
- Mycobacteria Unit, Clinical Laboratories, Microbiology Service, Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, 08035 Barcelona, Spain
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