{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,12]],"date-time":"2026-05-12T20:59:40Z","timestamp":1778619580255,"version":"3.51.4"},"reference-count":60,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2023,11,27]],"date-time":"2023-11-27T00:00:00Z","timestamp":1701043200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100002347","name":"German Federal Ministry of Education and Research, BMBF","doi-asserted-by":"publisher","award":["FKZ: 01KI2136"],"award-info":[{"award-number":["FKZ: 01KI2136"]}],"id":[{"id":"10.13039\/501100002347","id-type":"DOI","asserted-by":"publisher"}]},{"name":"University of Siegen","award":["FKZ: 01KI2136"],"award-info":[{"award-number":["FKZ: 01KI2136"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pharmaceutics"],"abstract":"<jats:p>The development of new approaches for the treatment of the increasingly antibiotic-resistant pathogen Pseudomonas aeruginosa was targeted by enhancing the effect of local antimicrobial photodynamic therapy (aPDT) using poly(ethylene glycol)-block-poly(lactic acid) (PEG114-block-PLAx) nanocarriers that were loaded with a ruthenium-based photosensitizer (PS). The action of tris(1,10-phenanthroline) ruthenium (II) bis(hexafluorophosphate) (RuPhen3) encapsulated in PEG114-block-PLAx micelles and vesicles was shown to result in an appreciable aPDT inactivation efficiency against planktonic Pseudomonas aeruginosa. In particular, the encapsulation of the PS, its release, and the efficiency of singlet oxygen (1O2) generation upon irradiation with blue light were studied spectroscopically. The antimicrobial effect was analyzed with two strains of Pseudomonas aeruginosa. Compared with PS-loaded micelles, formulations of the PS-loaded vesicles showed 10 times enhanced activity with a strong photodynamic inactivation effect of at least a 4.7 log reduction against both a Pseudomonas\u00a0aeruginosa lab strain and a clinical isolate collected from the lung of a cystic fibrosis (CF) patient. This work lays the foundation for the targeted eradication of Pseudomonas aeruginosa using aPDT in various medical application areas.<\/jats:p>","DOI":"10.3390\/pharmaceutics15122683","type":"journal-article","created":{"date-parts":[[2023,11,27]],"date-time":"2023-11-27T07:56:10Z","timestamp":1701071770000},"page":"2683","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Photodynamic Eradication of Pseudomonas aeruginosa with Ru-Photosensitizers Encapsulated in Enzyme Degradable Nanocarriers"],"prefix":"10.3390","volume":"15","author":[{"given":"Kawaljit","family":"Kaur","sequence":"first","affiliation":[{"name":"Physical Chemistry I & Research Center of Micro- and Nanochemistry and (Bio)Technology (<i>C\u03bc<\/i>), Department of Chemistry and Biology, School of Science and Technology, University of Siegen, 57076 Siegen, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1426-590X","authenticated-orcid":false,"given":"Max","family":"M\u00fcller","sequence":"additional","affiliation":[{"name":"Physical Chemistry I & Research Center of Micro- and Nanochemistry and (Bio)Technology (<i>C\u03bc<\/i>), Department of Chemistry and Biology, School of Science and Technology, University of Siegen, 57076 Siegen, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0891-5160","authenticated-orcid":false,"given":"Mareike","family":"M\u00fcller","sequence":"additional","affiliation":[{"name":"Physical Chemistry I & Research Center of Micro- and Nanochemistry and (Bio)Technology (<i>C\u03bc<\/i>), Department of Chemistry and Biology, School of Science and Technology, University of Siegen, 57076 Siegen, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5836-5569","authenticated-orcid":false,"given":"Holger","family":"Sch\u00f6nherr","sequence":"additional","affiliation":[{"name":"Physical Chemistry I & Research Center of Micro- and Nanochemistry and (Bio)Technology (<i>C\u03bc<\/i>), Department of Chemistry and Biology, School of Science and Technology, University of Siegen, 57076 Siegen, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,11,27]]},"reference":[{"key":"ref_1","unstructured":"(2023, October 16). 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