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Article: Controlled-temperature photothermal and oxidative bacteria killing and acceleration of wound healing by polydopamine-assisted Au-hydroxyapatite nanorods

TitleControlled-temperature photothermal and oxidative bacteria killing and acceleration of wound healing by polydopamine-assisted Au-hydroxyapatite nanorods
Authors
KeywordsAu
Hydroxyapatite
Controlled temperature photothermal therapy
Wound healing
Antibacterial
Issue Date2018
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/actabiomat
Citation
Acta Biomaterialia, 2018, v. 77, p. 352-364 How to Cite?
AbstractSince skin wounds are subject to bacterial infection and tissue regeneration may be impeded, there is demand for biomaterials that possess rapid bactericidal and tissue repair capability. Herein we report in situ promotion of wound healing by a photothermal therapy (PTT) assisted nanocatalytic antibacterial system utilizing a polydopamine (PDA) coating on hydroxyapatite (HAp) incorporated with gold nanoparticles (Au-HAp). The PDA@Au-HAp NPs produce hydroxyl radicals (OH) via catalysis of a small concentration of H2O2 to render bacteria more vulnerable to the temperature change. The antibacterial efficacy against Escherichia coli and Staphylococcus aureus is 96.8% and 95.2%, respectively, at a controlled photo-induced temperature of 45 °C that causes no damage to normal tissues. By combining catalysis with near-infrared (NIR) photothermal therapy, the PDA@Au-HAp NPs provide safe, rapid, and effective antibacterial activity compared to OH or PTT alone. In addition, this system stimulates the tissue repairing-related gene expression to facilitate the formation of granulation tissues and collagen synthesis and thus accelerate wound healing. After the 10-day treatment of skin wounds in vivo, PDA@Au-HAp group exhibits quicker recovery than the control group and both sterilization and healing are completed after the 10-day treatment. Statement of significance: This study presents in situ promotion of wound healing by a low-temperature photothermal therapy (PTT) assisted nanocatalytic antibacterial system utilizing a polydopamine (PDA) coating on hydroxyapatite (HAp) incorporated with gold nanoparticles (Au-HAp). The PDA@Au-HAp NPs produce hydroxyl radicals (OH) via catalysis of a small concentration of H2O2 to render bacteria more vulnerable to temperature change. After irradiation by 808 nm laser, the antibacterial efficacy against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) is 96.8% and 95.2%, respectively, at a low photo-induced temperature of 45 °C which causes no damage to normal tissues. In addition, this system stimulates the tissue repairing-related gene expression to facilitate the formation of granulation tissues and collagen synthesis and accelerate wound healing.
Persistent Identifierhttp://hdl.handle.net/10722/278228
ISSN
2017 Impact Factor: 6.383
2015 SCImago Journal Rankings: 2.020

 

DC FieldValueLanguage
dc.contributor.authorXU, X-
dc.contributor.authorLIU, X-
dc.contributor.authorTAN, L-
dc.contributor.authorCUI, Z-
dc.contributor.authorYANG, X-
dc.contributor.authorZHU, S-
dc.contributor.authorLI, Z-
dc.contributor.authorYUAN, X-
dc.contributor.authorZHENG, Y-
dc.contributor.authorYeung, KWK-
dc.contributor.authorCHU, PK-
dc.contributor.authorWU, S-
dc.date.accessioned2019-10-04T08:09:57Z-
dc.date.available2019-10-04T08:09:57Z-
dc.date.issued2018-
dc.identifier.citationActa Biomaterialia, 2018, v. 77, p. 352-364-
dc.identifier.issn1742-7061-
dc.identifier.urihttp://hdl.handle.net/10722/278228-
dc.description.abstractSince skin wounds are subject to bacterial infection and tissue regeneration may be impeded, there is demand for biomaterials that possess rapid bactericidal and tissue repair capability. Herein we report in situ promotion of wound healing by a photothermal therapy (PTT) assisted nanocatalytic antibacterial system utilizing a polydopamine (PDA) coating on hydroxyapatite (HAp) incorporated with gold nanoparticles (Au-HAp). The PDA@Au-HAp NPs produce hydroxyl radicals (OH) via catalysis of a small concentration of H2O2 to render bacteria more vulnerable to the temperature change. The antibacterial efficacy against Escherichia coli and Staphylococcus aureus is 96.8% and 95.2%, respectively, at a controlled photo-induced temperature of 45 °C that causes no damage to normal tissues. By combining catalysis with near-infrared (NIR) photothermal therapy, the PDA@Au-HAp NPs provide safe, rapid, and effective antibacterial activity compared to OH or PTT alone. In addition, this system stimulates the tissue repairing-related gene expression to facilitate the formation of granulation tissues and collagen synthesis and thus accelerate wound healing. After the 10-day treatment of skin wounds in vivo, PDA@Au-HAp group exhibits quicker recovery than the control group and both sterilization and healing are completed after the 10-day treatment. Statement of significance: This study presents in situ promotion of wound healing by a low-temperature photothermal therapy (PTT) assisted nanocatalytic antibacterial system utilizing a polydopamine (PDA) coating on hydroxyapatite (HAp) incorporated with gold nanoparticles (Au-HAp). The PDA@Au-HAp NPs produce hydroxyl radicals (OH) via catalysis of a small concentration of H2O2 to render bacteria more vulnerable to temperature change. After irradiation by 808 nm laser, the antibacterial efficacy against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) is 96.8% and 95.2%, respectively, at a low photo-induced temperature of 45 °C which causes no damage to normal tissues. In addition, this system stimulates the tissue repairing-related gene expression to facilitate the formation of granulation tissues and collagen synthesis and accelerate wound healing.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/actabiomat-
dc.relation.ispartofActa Biomaterialia-
dc.subjectAu-
dc.subjectHydroxyapatite-
dc.subjectControlled temperature photothermal therapy-
dc.subjectWound healing-
dc.subjectAntibacterial-
dc.titleControlled-temperature photothermal and oxidative bacteria killing and acceleration of wound healing by polydopamine-assisted Au-hydroxyapatite nanorods-
dc.typeArticle-
dc.identifier.emailYeung, KWK: wkkyeung@hku.hk-
dc.identifier.authorityYeung, KWK=rp00309-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.actbio.2018.07.030-
dc.identifier.pmid30030176-
dc.identifier.scopuseid_2-s2.0-85050082553-
dc.identifier.hkuros306874-
dc.identifier.volume77-
dc.identifier.spage352-
dc.identifier.epage364-
dc.publisher.placeNetherlands-

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