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Rancan F, Jurisch J, Günday C, Türeli E, Blume-Peytavi U, Vogt A, Schaudinn C, Günday-Türeli N. Screening of Surfactants for Improved Delivery of Antimicrobials and Poly-Lactic- co-Glycolic Acid Particles in Wound Tissue. Pharmaceutics 2021; 13:1093. [PMID: 34371785 PMCID: PMC8308990 DOI: 10.3390/pharmaceutics13071093] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 07/07/2021] [Accepted: 07/14/2021] [Indexed: 01/14/2023] Open
Abstract
Topical wound management is often a challenge due to the poor penetration of antimicrobials in wound tissue and across the biofilm matrix where bacteria are embedded. Surfactants have been used for decades to improve the stability of formulations, increase drug solubility, and enhance penetration. In this study, we screened different detergents with respect to their cytotoxicity and their ability to improve the penetration of poly-lactic-co-glycolic acid (PLGA) particles in wound tissue. Among the tested surfactants, Kolliphor SLS and Tween 80 increased the penetration of PLGA particles and had a limited cytotoxicity. Then, these surfactants were used to formulate PLGA particles loaded with the poorly water-soluble antibiotic ciprofloxacin. The antimicrobial efficacy of the formulations was tested in a wound infection model based on human ex vivo skin. We found that even though PLGA particles had the same antimicrobial efficiency than the particle-free drug formulation, thanks to their solubilizing and anti-biofilm properties, the surfactants remarkably improved the antimicrobial activity of ciprofloxacin with respect to the drug formulation in water. We conclude that the use of Tween 80 in antimicrobial formulations might be a safe and efficient option to improve the topical antimicrobial management of chronic wound infections.
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Affiliation(s)
- Fiorenza Rancan
- Research Center for Hair and Skin Science, Department of Dermatology and Allergy, Charité–Universitätsmedizin Berlin 10117, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany; (J.J.); (U.B.-P.); (A.V.)
| | - Jana Jurisch
- Research Center for Hair and Skin Science, Department of Dermatology and Allergy, Charité–Universitätsmedizin Berlin 10117, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany; (J.J.); (U.B.-P.); (A.V.)
| | - Cemre Günday
- MyBiotech, 66802 Überherrn, Germany; (C.G.); (E.T.); (N.G.-T.)
| | - Emre Türeli
- MyBiotech, 66802 Überherrn, Germany; (C.G.); (E.T.); (N.G.-T.)
| | - Ulrike Blume-Peytavi
- Research Center for Hair and Skin Science, Department of Dermatology and Allergy, Charité–Universitätsmedizin Berlin 10117, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany; (J.J.); (U.B.-P.); (A.V.)
| | - Annika Vogt
- Research Center for Hair and Skin Science, Department of Dermatology and Allergy, Charité–Universitätsmedizin Berlin 10117, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 10117 Berlin, Germany; (J.J.); (U.B.-P.); (A.V.)
| | - Christoph Schaudinn
- Advanced Light and Electron Microscopy (Zentrum für Biologische Gefahren und Spezielle Pathogene 4), Robert Koch Institute, 13353 Berlin, Germany;
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2
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Kowalczuk D, Miazga-Karska M, Gładysz A, Warda P, Barańska A, Drop B. Characterization of Ciprofloxacin-Bismuth-Loaded Antibacterial Wound Dressing. Molecules 2020; 25:E5096. [PMID: 33153027 PMCID: PMC7662692 DOI: 10.3390/molecules25215096] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 10/31/2020] [Accepted: 11/01/2020] [Indexed: 12/22/2022] Open
Abstract
The research was focused on developing a potentially antibacterial wound dressing made of polyurethane foam and loaded with bismuth-ciprofloxacin (Cip-Bi). The Cip-Bi chemical structure was confirmed by Fourier transform infrared spectroscopic (FTIR) analysis. The sought after antibacterial wound dressing was obtained by modification of the raw dressing with an iodine or bromine solution and subsequently with a Cip-Bi hydrogel. The amount of Cip-Bi loaded into the dressing matrix was determined indirectly on the basis of the differences in Cip-Bi concentrations, before and after the modification process, and the determination was performed with the HPLC (high-performance liquid chromatography) method. The modified dressing was found to have a two-step release of Cip-Bi, a feature helpful in the treatment of locally infected wounds and prevention of secondary bacterial infection. The zone of inhibition test against the selected Gram-positive and Gram-negative bacteria confirmed the antibacterial activity of the Cip-Bi-modified dressing. Preliminary tests conducted so far have been indicative of the Cip-Bi dressing's relatively high activity against the tested organisms.
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Affiliation(s)
- Dorota Kowalczuk
- Department of Medicinal Chemistry, Faculty of Pharmacy, Medical University of Lublin, 20-090 Lublin, Poland; (A.G.); (P.W.)
| | - Małgorzata Miazga-Karska
- Department of Biochemistry and Biotechnology, Faculty of Pharmacy, Medical University of Lublin, 20-090 Lublin, Poland;
| | - Agata Gładysz
- Department of Medicinal Chemistry, Faculty of Pharmacy, Medical University of Lublin, 20-090 Lublin, Poland; (A.G.); (P.W.)
| | - Paweł Warda
- Department of Medicinal Chemistry, Faculty of Pharmacy, Medical University of Lublin, 20-090 Lublin, Poland; (A.G.); (P.W.)
| | - Agnieszka Barańska
- Department of Informatics and Medical Statistics, Medical University of Lublin, 20-090 Lublin, Poland; (A.B.); (B.D.)
| | - Bartłomiej Drop
- Department of Informatics and Medical Statistics, Medical University of Lublin, 20-090 Lublin, Poland; (A.B.); (B.D.)
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Rancan F, Contardi M, Jurisch J, Blume-Peytavi U, Vogt A, Bayer IS, Schaudinn C. Evaluation of Drug Delivery and Efficacy of Ciprofloxacin-Loaded Povidone Foils and Nanofiber Mats in a Wound-Infection Model Based on Ex Vivo Human Skin. Pharmaceutics 2019; 11:pharmaceutics11100527. [PMID: 31614886 PMCID: PMC6836216 DOI: 10.3390/pharmaceutics11100527] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 10/08/2019] [Accepted: 10/10/2019] [Indexed: 12/05/2022] Open
Abstract
Topical treatment of wound infections is often a challenge due to limited drug availability at the site of infection. Topical drug delivery is an attractive option for reducing systemic side effects, provided that a more selective and sustained local drug delivery is achieved. In this study, a poorly water-soluble antibiotic, ciprofloxacin, was loaded on polyvinylpyrrolidone (PVP)-based foils and nanofiber mats using acetic acid as a solubilizer. Drug delivery kinetics, local toxicity, and antimicrobial activity were tested on an ex vivo wound model based on full-thickness human skin. Wounds of 5 mm in diameter were created on 1.5 × 1.5 cm skin blocks and treated with the investigated materials. While nanofiber mats reached the highest amount of delivered drug after 6 h, foils rapidly achieved a maximum drug concentration and maintained it over 24 h. The treatment had no effect on the overall skin metabolic activity but influenced the wound healing process, as observed using histological analysis. Both delivery systems were efficient in preventing the growth of Pseudomonas aeruginosa biofilms in ex vivo human skin. Interestingly, foils loaded with 500 µg of ciprofloxacin accomplished the complete eradication of biofilm infections with 1 × 109 bacteria/wound. We conclude that antimicrobial-loaded resorbable PVP foils and nanofiber mats are promising delivery systems for the prevention or topical treatment of infected wounds.
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Affiliation(s)
- Fiorenza Rancan
- Clinical Research Center for Hair and Skin Science, Department of Dermatology and Allergy, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 10117 Berlin, Germany.
| | - Marco Contardi
- Smart Materials, Istituto Italiano di Tecnologia, 16163 Genova, Italy.
| | - Jana Jurisch
- Clinical Research Center for Hair and Skin Science, Department of Dermatology and Allergy, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 10117 Berlin, Germany.
| | - Ulrike Blume-Peytavi
- Clinical Research Center for Hair and Skin Science, Department of Dermatology and Allergy, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 10117 Berlin, Germany.
| | - Annika Vogt
- Clinical Research Center for Hair and Skin Science, Department of Dermatology and Allergy, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 10117 Berlin, Germany.
| | - Ilker S Bayer
- Smart Materials, Istituto Italiano di Tecnologia, 16163 Genova, Italy.
| | - Christoph Schaudinn
- Advanced Light and Electron Microscopy, ZBS4, Robert Koch Institute, 13353 Berlin, Germany.
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4
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Angsantikul P, Thamphiwatana S, Zhang Q, Spiekermann K, Zhuang J, Fang RH, Gao W, Obonyo M, Zhang L. Coating nanoparticles with gastric epithelial cell membrane for targeted antibiotic delivery against Helicobacter pylori infection. Adv Ther (Weinh) 2018; 1:1800016. [PMID: 30320205 PMCID: PMC6176867 DOI: 10.1002/adtp.201800016] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Indexed: 12/21/2022]
Abstract
Inspired by the natural pathogen-host interactions and adhesion, this study reports on the development of a novel targeted nanotherapeutics for the treatment of Helicobacter pylori (H. pylori) infection. Specifically, plasma membranes of gastric epithelial cells (e.g. AGS cells) are collected and coated onto antibiotic-loaded polymeric cores, the resulting biomimetic nanoparticles (denoted AGS-NPs) bear the same surface antigens as the source AGS cells and thus have inherent adhesion to H. pylori bacteria. When incubated with H. pylori bacteria in vitro, the AGS-NPs preferentially accumulate on the bacterial surfaces. Using clarithromycin (CLR) as a model antibiotic and a mouse model of H. pylori infection, the CLR-loaded AGS-NPs demonstrate superior therapeutic efficacy as compared the free drug counterpart as well as non-targeted nanoparticle control group. Overall, this work illustrates the promise and strength of using natural host cell membranes to functionalize drug nanocarriers for targeted drug delivery to pathogens that colonize on the host cells. As host-pathogen adhesion represents a common biological event for various types of pathogenic bacteria, the bioinspired nanotherapeutic strategy reported here represents a versatile delivery platform that may be applied to treat numerous infectious diseases.
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Affiliation(s)
- Pavimol Angsantikul
- Department of NanoEngineering and Moores Cancer Center, University of California San Diego, La Jolla, CA 92093, USA
| | - Soracha Thamphiwatana
- Department of NanoEngineering and Moores Cancer Center, University of California San Diego, La Jolla, CA 92093, USA
| | - Qiangzhe Zhang
- Department of NanoEngineering and Moores Cancer Center, University of California San Diego, La Jolla, CA 92093, USA
| | - Kevin Spiekermann
- Department of NanoEngineering and Moores Cancer Center, University of California San Diego, La Jolla, CA 92093, USA
| | - Jia Zhuang
- Department of NanoEngineering and Moores Cancer Center, University of California San Diego, La Jolla, CA 92093, USA
| | - Ronnie H Fang
- Department of NanoEngineering and Moores Cancer Center, University of California San Diego, La Jolla, CA 92093, USA
| | - Weiwei Gao
- Department of NanoEngineering and Moores Cancer Center, University of California San Diego, La Jolla, CA 92093, USA
| | - Marygorret Obonyo
- Department of Medicine, University of California San Diego, La Jolla, CA 92093, USA
| | - Liangfang Zhang
- Department of NanoEngineering and Moores Cancer Center, University of California San Diego, La Jolla, CA 92093, USA
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Montanari E, Di Meo C, Oates A, Coviello T, Matricardi P. Pursuing Intracellular Pathogens with Hyaluronan. From a 'Pro-Infection' Polymer to a Biomaterial for 'Trojan Horse' Systems. Molecules 2018; 23:E939. [PMID: 29670009 PMCID: PMC6017551 DOI: 10.3390/molecules23040939] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 04/12/2018] [Accepted: 04/13/2018] [Indexed: 12/12/2022] Open
Abstract
Hyaluronan (HA) is among the most important bioactive polymers in mammals, playing a key role in a number of biological functions. In the last decades, it has been increasingly studied as a biomaterial for drug delivery systems, thanks to its physico-chemical features and ability to target and enter certain cells. The most important receptor of HA is ‘Cluster of Differentiation 44’ (CD44), a cell surface glycoprotein over-expressed by a number of cancers and heavily involved in HA endocytosis. Moreover, CD44 is highly expressed by keratinocytes, activated macrophages and fibroblasts, all of which can act as ‘reservoirs’ for intracellular pathogens. Interestingly, both CD44 and HA appear to play a key role for the invasion and persistence of such microorganisms within the cells. As such, HA is increasingly recognised as a potential target for nano-carriers development, to pursuit and target intracellular pathogens, acting as a ‘Trojan Horse’. This review describes the biological relationship between HA, CD44 and the entry and survival of a number of pathogens within the cells and the subsequent development of HA-based nano-carriers for enhancing the intracellular activity of antimicrobials.
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Affiliation(s)
- Elita Montanari
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy.
| | - Chiara Di Meo
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy.
| | - Angela Oates
- School of Healthcare, Faculty of Medicine and Health, University of Leeds, Leeds LS2 9JT, UK.
| | - Tommasina Coviello
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy.
| | - Pietro Matricardi
- Department of Drug Chemistry and Technologies, Sapienza University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy.
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6
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Zhang Y, Zhang J, Chen M, Gong H, Thamphiwatana S, Eckmann L, Gao W, Zhang L. A Bioadhesive Nanoparticle-Hydrogel Hybrid System for Localized Antimicrobial Drug Delivery. ACS Appl Mater Interfaces 2016; 8:18367-74. [PMID: 27352845 PMCID: PMC4983189 DOI: 10.1021/acsami.6b04858] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Effective antibacterial treatment at the infection site associated with high shear forces remains challenging, owing largely to the lack of durably adhesive and safe delivery platforms that can enable localized antibiotic accumulation against bacterial colonization. Inspired by delivery systems mimicking marine mussels for adhesion, herein, we developed a bioadhesive nanoparticle-hydrogel hybrid (NP-gel) to enhance localized antimicrobial drug delivery. Antibiotics were loaded into polymeric nanoparticles and then embedded into a 3D hydrogel network that confers adhesion to biological surfaces. The combination of two distinct delivery platforms, namely, nanoparticles and hydrogel, allows the hydrogel network properties to be independently tailored for adhesion while maintaining controlled and prolonged antibiotic release profile from the nanoparticles. The bioadhesive NP-gel developed here showed superior adhesion and antibiotic retention under high shear stress on a bacterial film, a mammalian cell monolayer, and mouse skin tissue. Under a flow environment, the NP-gel inhibited the formation of an Escherichia coli bacterial film. When applied on mouse skin tissue for 7 consecutive days, the NP-gel did not generate any observable skin reaction or toxicity, implying its potential as a safe and effective local delivery platform against microbial infections.
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Affiliation(s)
- Yue Zhang
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | - Jianhua Zhang
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA
- Department of Polymer Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Maggie Chen
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Hua Gong
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA
- Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Soracha Thamphiwatana
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | - Lars Eckmann
- Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA
| | - Weiwei Gao
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | - Liangfang Zhang
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
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7
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Thamphiwatana S, Gao W, Pornpattananangkul D, Zhang Q, Fu V, Li J, Li J, Obonyo M, Zhang L. Phospholipase A2-responsive antibiotic delivery via nanoparticle-stabilized liposomes for the treatment of bacterial infection. J Mater Chem B 2014; 2:8201-8207. [PMID: 25544886 PMCID: PMC4276341 DOI: 10.1039/c4tb01110d] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Adsorbing small charged nanoparticles onto liposome surfaces to stabilize them against fusion and payload leakage has resulted in a new class of liposomes capable of environment-responsive drug delivery. Herein, we engineered a liposome formulation with a lipid composition sensitive to bacterium-secreted phospholipase A2 (PLA2) and adsorbed chitosan-modified gold nanoparticles (AuChi) onto the liposome surface. The resulting AuChi-stabilized liposomes (AuChi-liposomes) showed prohibited fusion activity and negligible drug leakage. However, upon exposure to either purified PLA2 enzyme or PLA2 secreted by Helicobacter pylori (H. pylori) bacteria in culture, AuChi-liposomes rapidly released the encapsulated payloads and such responsive release was retarded by adding quinacrine dihydrochloride, a PLA2 inhibitor. When loaded with doxycycline, AuChi-liposomes effectively inhibited H. pylori growth. Overall, the AuChi-liposomes allowed for smart "on-demand" antibitoic delivery: the more enzymes or bacteria present at the infection site, the more drug will be released to treat the infection. Given the strong association of PLA2 with a diverse range of diseases, the present liposomal delivery technique holds broad application potential for tissue microenvironment-responsive drug delivery.
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Affiliation(s)
- Soracha Thamphiwatana
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, USA
| | - Weiwei Gao
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, USA
| | - Dissaya Pornpattananangkul
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, USA
| | - Qiangzhe Zhang
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, USA
| | - Victoria Fu
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, USA
| | - Jiayang Li
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, USA
| | - Jieming Li
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, USA
| | - Marygorret Obonyo
- Department of Medicine, University of California, San Diego, La Jolla, California 92093, USA
| | - Liangfang Zhang
- Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, USA
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8
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Gao W, Thamphiwatana S, Angsantikul P, Zhang L. Nanoparticle approaches against bacterial infections. Wiley Interdiscip Rev Nanomed Nanobiotechnol 2014; 6:532-47. [PMID: 25044325 PMCID: PMC4197093 DOI: 10.1002/wnan.1282] [Citation(s) in RCA: 150] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Revised: 06/05/2014] [Accepted: 06/18/2014] [Indexed: 12/12/2022]
Abstract
Despite the wide success of antibiotics, the treatment of bacterial infections still faces significant challenges, particularly the emergence of antibiotic resistance. As a result, nanoparticle drug delivery platforms including liposomes, polymeric nanoparticles, dendrimers, and various inorganic nanoparticles have been increasingly exploited to enhance the therapeutic effectiveness of existing antibiotics. This review focuses on areas where nanoparticle approaches hold significant potential to advance the treatment of bacterial infections. These areas include targeted antibiotic delivery, environmentally responsive antibiotic delivery, combinatorial antibiotic delivery, nanoparticle-enabled antibacterial vaccination, and nanoparticle-based bacterial detection. In each area we highlight the innovative antimicrobial nanoparticle platforms and review their progress made against bacterial infections.
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Affiliation(s)
- Weiwei Gao
- Department of NanoEngineering and Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | - Soracha Thamphiwatana
- Department of NanoEngineering and Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | - Pavimol Angsantikul
- Department of NanoEngineering and Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | - Liangfang Zhang
- Department of NanoEngineering and Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
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9
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Gao W, Vecchio D, Li J, Zhu J, Zhang Q, Fu V, Li J, Thamphiwatana S, Lu D, Zhang L. Hydrogel containing nanoparticle-stabilized liposomes for topical antimicrobial delivery. ACS Nano 2014; 8:2900-7. [PMID: 24483239 PMCID: PMC4004330 DOI: 10.1021/nn500110a] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 02/01/2014] [Indexed: 05/18/2023]
Abstract
Adsorbing small charged nanoparticles onto the outer surfaces of liposomes has become an effective strategy to stabilize liposomes against fusion prior to "seeing" target bacteria, yet allow them to fuse with the bacteria upon arrival at the infection sites. As a result, nanoparticle-stabilized liposomes have become an emerging drug delivery platform for treatment of various bacterial infections. To facilitate the translation of this platform for clinical tests and uses, herein we integrate nanoparticle-stabilized liposomes with hydrogel technology for more effective and sustained topical drug delivery. The hydrogel formulation not only preserves the structural integrity of the nanoparticle-stabilized liposomes, but also allows for controllable viscoeleasticity and tunable liposome release rate. Using Staphylococcus aureus bacteria as a model pathogen, we demonstrate that the hydrogel formulation can effectively release nanoparticle-stabilized liposomes to the bacterial culture, which subsequently fuse with bacterial membrane in a pH-dependent manner. When topically applied onto mouse skin, the hydrogel formulation does not generate any observable skin toxicity within a 7-day treatment. Collectively, the hydrogel containing nanoparticle-stabilized liposomes hold great promise for topical applications against various microbial infections.
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Affiliation(s)
- Weiwei Gao
- Department of NanoEngineering, Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, United States
| | - Drew Vecchio
- Department of NanoEngineering, Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, United States
| | - Jieming Li
- Department of NanoEngineering, Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, United States
| | - Jingying Zhu
- Department of NanoEngineering, Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, United States
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Qiangzhe Zhang
- Department of NanoEngineering, Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, United States
| | - Victoria Fu
- Department of NanoEngineering, Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, United States
| | - Jiayang Li
- Department of NanoEngineering, Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, United States
| | - Soracha Thamphiwatana
- Department of NanoEngineering, Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, United States
| | - Diannan Lu
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Liangfang Zhang
- Department of NanoEngineering, Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, United States
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10
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Pornpattananangkul D, Fu V, Thamphiwatana S, Zhang L, Chen M, Vecchio J, Gao W, Huang CM, Zhang L. In vivo treatment of Propionibacterium acnes infection with liposomal lauric acids. Adv Healthc Mater 2013; 2:1322-8. [PMID: 23495239 DOI: 10.1002/adhm.201300002] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Indexed: 11/06/2022]
Abstract
Propionibacterium acnes (P. acnes) is a Gram-positive bacterium strongly associated with acne infection. While many antimicrobial agents have been used in clinic to treat acne infection by targeting P. acnes, these existing anti-acne agents usually produce considerable side effects. Herein, the development and evaluation of liposomal lauric acids (LipoLA) is reported as a new, effective and safe therapeutic agent for the treatment of acne infection. By incorporating lauric acids into the lipid bilayer of liposomes, it is observed that the resulting LipoLA readily fuse with bacterial membranes, causing effective killing of P. acnes by disrupting bacterial membrane structures. Using a mouse ear model, we demonstrated that the bactericidal property of LipoLA against P. acne is well preserved at physiological conditions. Topically applying LipoLA in a gel form onto the infectious sites leads to eradication of P. acnes bacteria in vivo. Further skin toxicity studies show that LipoLA does not induce acute toxicity to normal mouse skin, while benzoyl peroxide and salicylic acid, the two most popular over-the-counter acne medications, generate moderate to severe skin irritation within 24 h. These results suggest that LipoLA hold a high therapeutic potential for the treatment of acne infection and other P. acnes related diseases.
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Affiliation(s)
- Dissaya Pornpattananangkul
- Department of NanoEngineering and Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, USA
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11
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Abstract
We report a novel pH-responsive gold nanoparticle-stabilized liposome system for gastric antimicrobial delivery. By adsorbing small chitosan-modified gold nanoparticles (diameter ~10 nm) onto the outer surface of negatively charged phospholipid liposomes (diameter ~75 nm), we show that at gastric pH the liposomes have excellent stability with limited fusion ability and negligible cargo releases. However, when the stabilized liposomes are present in an environment with neutral pH, the gold stabilizers detach from the liposomes, resulting in free liposomes that can actively fuse with bacterial membranes. Using Helicobacter pylori as a model bacterium and doxycycline as a model antibiotic, we demonstrate such pH-responsive fusion activity and drug release profile of the nanoparticle-stabilized liposomes. Particularly, at neutral pH the gold nanoparticles detach, and thus the doxycycline-loaded liposomes rapidly fuse with bacteria and cause superior bactericidal efficacy as compared to the free doxycycline counterpart. Our results suggest that the reported liposome system holds a substantial potential for gastric drug delivery; it remains inactive (stable) in the stomach lumen but actively interacts with bacteria once it reaches the mucus layer of the stomach where the bacteria may reside.
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Affiliation(s)
- Soracha Thamphiwatana
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | - Victoria Fu
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Jingying Zhu
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
- Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Diannan Lu
- Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China
| | - Weiwei Gao
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
| | - Liangfang Zhang
- Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA
- Corresponding author, Tel: 858-246-0999,
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12
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Abstract
BACKGROUND Polymorphonuclear leukocytes (PMNs) take up and accumulate ciprofloxacin. This may allow them to enhance the delivery of this agent to the inflamed periodontium. METHODS Cross-sectional and longitudinal approaches were used to test the hypothesis. In the cross-sectional study, 7 periodontally healthy adults and 8 adults with untreated periodontitis were administered three doses of ciprofloxacin (500 mg bid). Gingival fluid (GF) and serum samples were obtained after 28 hours and analyzed by high-performance liquid chromatography (HPLC). In the longitudinal study, 8 adult periodontitis subjects were administered 500 mg ciprofloxacin bid for 8 days. After 28 hours, GF from 4 sites with 5 to 8 mm probing depths was sampled in each subject, serum samples were obtained, and 2 of the 4 sites were root planed. GF and serum were sampled again 7 days later (196 hours after the initial dose). RESULTS The mean ciprofloxacin levels in the GF and serum of periodontally healthy subjects were 2.52 +/- 0.22 microg/ml and 0.47 +/- 0.05 microg/ml, respectively. In subjects with periodontitis, these levels were 2.69 +/- 0.44 microg/ml and 0.61 +/- 0.13 microg/ml, respectively. GF ciprofloxacin levels were significantly higher than corresponding serum levels in healthy and diseased subjects (P<0.01), but there were no significant differences in GF or serum levels between the 2 subject groups. Since GF flow was significantly higher at diseased sites, however, more ciprofloxacin was distributed to these sites than to healthy sites. In the longitudinal study, GF flow at 196 hours was 16% lower at root planed sites than at untreated control sites (P = 0.412). The minor decrease in this index of inflammation was accompanied by a small (9%), but statistically significant (P= 0.007), decrease in GF ciprofloxacin levels. CONCLUSIONS GF ciprofloxacin levels decreased slightly at inflamed periodontal sites after root planing, but were significantly higher than serum levels even at healthy periodontal sites. Inflammation may enhance the distribution of ciprofloxacin to diseased sites, but it is not a major determinant of GF ciprofloxacin levels.
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Affiliation(s)
- Theresa B. Conway
- Sections of Periodontology, The Ohio State University Health Sciences Center
| | - Frank M. Beck
- Sections of Health Services Research, College of Dentistry, The Ohio State University Health Sciences Center
| | - John D. Walters
- Sections of Periodontology, The Ohio State University Health Sciences Center
- Department of Molecular and Cellular Biochemistry, College of Medicine and Public Health, The Ohio State University Health Sciences Center
- *Address correspondence and reprint requests to: John D. Walters, College of Dentistry, The Ohio State University, 305 West 12th Avenue, Columbus, OH 43210, Telephone: (614) 292-1322, Fax: (614) 292-2438,
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