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Yin X, Fan T, Zheng N, Yang J, Yan L, He S, Ai F, Hu J. Palladium nanoparticle based smart hydrogels for NIR light-triggered photothermal/photodynamic therapy and drug release with wound healing capability. NANOSCALE ADVANCES 2023; 5:1729-1739. [PMID: 36926581 PMCID: PMC10012852 DOI: 10.1039/d2na00897a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 02/13/2023] [Indexed: 06/18/2023]
Abstract
Tumor recurrence and wound repair are two major challenges following cancer surgical resection that can be addressed through precision nanomedicine. Herein, palladium nanoparticles (Pd NPs) with photothermal and photodynamic therapy (PTT/PDT) capacity were successfully synthesized. The Pd NPs were loaded with chemotherapeutic doxorubicin (DOX) to form hydrogels (Pd/DOX@hydrogel) as a smart anti-tumor platform. The hydrogels were composed of clinically approved agarose and chitosan, with excellent biocompatibility and wound healing ability. Pd/DOX@hydrogel can be used for both PTT and PDT with a synergistic effect to kill tumor cells. Additionally, the photothermal effect of Pd/DOX@hydrogel allowed the photo-triggered drug release of DOX. Therefore, Pd/DOX@hydrogel can be used for near-infrared (NIR)-triggered PTT and PDT as well as for photo-induced chemotherapy, efficiently inhibiting tumor growth. Furthermore, Pd/DOX@hydrogel can be used as a temporary biomimetic skin to block the invasion of foreign harmful substances, promote angiogenesis, and accelerate wound repair and new skin formation. Thus, the as-prepared smart Pd/DOX@hydrogel is expected to provide a feasible therapeutic solution following tumor resection.
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Affiliation(s)
- Xiuzhao Yin
- College of Applied Technology, Shenzhen University Shenzhen 518060 P. R. China
| | - Taojian Fan
- College of Applied Technology, Shenzhen University Shenzhen 518060 P. R. China
| | - Nannan Zheng
- College of Applied Technology, Shenzhen University Shenzhen 518060 P. R. China
| | - Jing Yang
- College of Health Science and Environmental Engineering, Shenzhen Technology University Shenzhen 518118 P. R. China
| | - Li Yan
- College of Health Science and Environmental Engineering, Shenzhen Technology University Shenzhen 518118 P. R. China
- Shenzhen Bay Laboratory Shenzhen 518132 P. R. China
| | - Shuqing He
- College of Health Science and Environmental Engineering, Shenzhen Technology University Shenzhen 518118 P. R. China
- Shenzhen Bay Laboratory Shenzhen 518132 P. R. China
| | - Fujin Ai
- College of Health Science and Environmental Engineering, Shenzhen Technology University Shenzhen 518118 P. R. China
- Shenzhen Bay Laboratory Shenzhen 518132 P. R. China
| | - Junqing Hu
- College of Applied Technology, Shenzhen University Shenzhen 518060 P. R. China
- College of Health Science and Environmental Engineering, Shenzhen Technology University Shenzhen 518118 P. R. China
- Shenzhen Bay Laboratory Shenzhen 518132 P. R. China
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Hoffmann JP, Friedman JK, Wang Y, McLachlan JB, Sammarco MC, Morici LA, Roy CJ. In situ Treatment With Novel Microbiocide Inhibits Methicillin Resistant Staphylococcus aureus in a Murine Wound Infection Model. Front Microbiol 2020; 10:3106. [PMID: 32038549 PMCID: PMC6990143 DOI: 10.3389/fmicb.2019.03106] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 12/23/2019] [Indexed: 01/27/2023] Open
Abstract
Increased prevalence of antibiotic resistance in skin and soft tissue infections is a concerning public health challenge currently facing medical science. A combinatory, broad spectrum biocidal antiseptic has been developed (“ASP”) as a topically applied solution to potential resistant and polymicrobial infected wounds that may be encountered in this context. The ASP-105 designate was evaluated in vitro by determining the minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC), against different strains of methicillin-resistant Staphylococcus aureus (MRSA), resulting estimates of which approximated the positive control (bacitracin). To evaluate in vivo microbicide efficacy, we utilized a murine full thickness wound model to study bacterial infection and wound healing kinetics. Mice were experimentally wounded dorsally and infected with bioluminescent MRSA. The infected wound was splinted, dressed and treated topically with either ASP-105, vehicle (-control), or bacitracin. Bacterial burden and wound healing was monitored using an in vivo imaging system and evaluation of biofilm formation using scanning electron microscopy of wound dressing. Treatment with ASP-105 significantly reduced bacterial burdens in the first 3 days of infection and inhibited MRSA biofilm formation on the surgical dressing. Notably, treatment with ASP-105 resulted in a sterilizing effect of any detectable MRSA in nearly all (80%; 4/5) of treatment group. All mice receiving vehicle control developed highly MRSA-luminescent and purulent wound beds as a result of experimental infection. The ASP-105 therapy facilitated natural healing in the absence of MRSA infection. Results of this study suggests that that the novel “ASP” combinatory topical antiseptic can be used directly in wounds as a potent, broad-spectrum microbicide against drug resistant S. aureus without injury to the wound bed and impediment of natural restorative processes associated with wound healing. Further studies are warranted to test the effectiveness of this biocidal formulation against other recalcitrant bacterial and fungal pathogens in the context of serious wound infections, and to assess utility of use in both clinical and self-treat scenarios.
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Affiliation(s)
- Joseph P Hoffmann
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, LA, United States
| | - Jessica K Friedman
- Department of Surgery, Tulane University School of Medicine, New Orleans, LA, United States
| | - Yihui Wang
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, LA, United States
| | - James B McLachlan
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, LA, United States
| | - Mimi C Sammarco
- Department of Surgery, Tulane University School of Medicine, New Orleans, LA, United States
| | - Lisa A Morici
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, LA, United States
| | - Chad J Roy
- Department of Microbiology and Immunology, Tulane University School of Medicine, New Orleans, LA, United States.,Division of Microbiology, Tulane National Primate Research Center, Covington, LA, United States
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Maiden MM, Zachos MP, Waters CM. Hydrogels Embedded With Melittin and Tobramycin Are Effective Against Pseudomonas aeruginosa Biofilms in an Animal Wound Model. Front Microbiol 2019; 10:1348. [PMID: 31293530 PMCID: PMC6598697 DOI: 10.3389/fmicb.2019.01348] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 05/31/2019] [Indexed: 12/16/2022] Open
Abstract
We demonstrate that the antimicrobial peptide, melittin, is effective alone and in combination with the aminoglycosides tobramycin to kill Pseudomonas aeruginosa growing as biofilms both in vitro and in vivo. Melittin and tobramycin show enhanced in vitro activity in combination at micromolar concentrations, resulting in a 2-log10 reduction in the number of cells within mature PAO1 P. aeruginosa biofilms after 6-h of treatment. Alternatively, either agent alone resulted in half-a-log10 reduction. Time-killing assays demonstrated that the combination of melittin and tobramycin was effective at 2-h whereas tobramycin was not effective until after 6-h of treatment. We also found the combination was more effective than tobramycin alone against biofilms of 7 P. aeruginosa cystic fibrosis clinical isolates, resulting in a maximum 1.5-log10 cellular reduction. Additionally, melittin alone was effective at killing biofilms of 4 Staphylococcus aureus isolates, resulting in a maximum 2-log10 cellular reduction. Finally, melittin in combination with tobramycin embedded in an agarose-based hydrogel resulted in a 4-fold reduction in bioluminescent P. aeruginosa colonizing mouse wounds by 4-h. In contrast, tobramycin or melittin treatment alone did not cause a statistically significant reduction in bioluminescence. These data demonstrate that melittin in combination with tobramycin embedded in a hydrogel is a potential treatment for biofilm-associated wound infections.
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Affiliation(s)
- Michael M. Maiden
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI, United States
- The BEACON Center for the Study of Evolution in Action, Michigan State University, East Lansing, MI, United States
| | - Mitchell P. Zachos
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI, United States
| | - Christopher M. Waters
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI, United States
- The BEACON Center for the Study of Evolution in Action, Michigan State University, East Lansing, MI, United States
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Yu Q, Han Y, Tian T, Zhou Q, Yi Z, Chang J, Wu C. Chinese sesame stick-inspired nano-fibrous scaffolds for tumor therapy and skin tissue reconstruction. Biomaterials 2018; 194:25-35. [PMID: 30572284 DOI: 10.1016/j.biomaterials.2018.12.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 11/29/2018] [Accepted: 12/10/2018] [Indexed: 01/20/2023]
Abstract
Surgery is a common treatment to remove the solid skin tumors. It is of great importance to eliminate the remaining tumor cells and achieve the simultaneous tissue reconstruction after surgery for improving life quality of cancer patients. Inspired by the designing strategy and fabrication method of Chinese sesame sticks, a Chinese sesame stick-like scaffold is developed by spin coating of CaCuSi4O10 nanoparticles (NPs) on the surface of electrospun fibers for tumor therapy and skin tissue reconstruction. The CaCuSi4O10 NPs can transform near-infrared light energy into heat energy, showing the photothermal conversion efficiency of 33.8%. After coating of the CaCuSi4O10 NPs on the fibers, the prepared scaffolds exhibit the Chinese sesame stick-like structure and achieve bifunction with both tumor killing and skin tissue reconstruction capacities. The CaCuSi4O10 NPs endow the scaffolds with photothermal ablation potential to rapidly kill the in vitro tumor cells. Furthermore, Chinese sesame stick-like scaffolds effectively inhibit in vivo tumor growth at the early stage and accelerate healing of cancer surgery-caused wounds at the later stage in tumor-bearing mice. Additionally, the composite scaffolds promote chronic wound healing by stimulating in vivo angiogenesis and re-epithelization, harnessing locally release of bioactive Cu2+ and SiO44- ions from the CaCuSi4O10 NPs. Therefore, the Chinese sesame stick-inspired scaffolds may lay a solid foundation for clinical treatment of cancers and cancer surgery-induced tissue damage.
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Affiliation(s)
- Qingqing Yu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yiming Han
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Tian Tian
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
| | - Quan Zhou
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
| | - Zhengfang Yi
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Jiang Chang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China
| | - Chengtie Wu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
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