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Guevara A, Armknecht K, Kudary C, Nallathamby P. PLGA Nanoparticles Formulations Loaded With Antibiotics Induce Sustained and Controlled Antibiotics Release for Prolonged Antibacterial Action Against MRSA, and Pseudomonas aeruginosa FRD1. Mil Med 2024; 189:230-238. [PMID: 39160825 DOI: 10.1093/milmed/usae079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 02/01/2024] [Accepted: 02/23/2024] [Indexed: 08/21/2024] Open
Abstract
The purpose of the present study was to create resorbable nanoparticles (NPs) using poly(lactic-co-glycolic acid) (PLGA) to develop novel antibacterial therapeutics for the treatment of chronic wound infections that are susceptible to recurrent infections. By first performing a release study, it was possible to predict the behavior of the different PLGA NP formulations and assess the efficacy of the nanocomposite drug delivery system. These PLGA NP formulations consisted of varying ratios of PLGA without polyvinyl alcohol (PVA) and PLGA with PVA (PLGA-PVA) (i.e., 25:75[PLGA25], 50:50[PLGA50], and 75:25[PLGA75]). Then, different antibiotics (i.e., ciprofloxacin and gentamicin) were incorporated into the PLGA NP formulations to test the antibacterial efficacy of these antimicrobial NPs against different pathogens (i.e., methicillin-resistant Staphylococcus aureus USA300 [MRSA], Pseudomonas aeruginosa FRD1, and Acinetobacter baumannii BAA1605). Of particular interest was testing against the MRSA strain USA300 and the P. aeruginosa strain FRD1. This was possible by measuring the zone of inhibition. A 3-day period was used to monitor the antibacterial efficacy of the different PLGA NP formulations (i.e., PLGA25, PLGA50, and a 1:1 combination of PLGA25:PLGA50) against A. baumannii BAA1605, MRSA, and P aeruginosa FRD1. Throughout the study, A. baumannii was a negative control and was resistant to all the PLGA NP formulations loaded with ciprofloxacin and gentamicin. At the end of the 3-day period, the PLGA and PLGA50 ciprofloxacin-loaded formulations produced zones of inhibition of 27 mm and 23 mm, respectively, against P. aeruginosa FRD1. This indicated that P. aeruginosa FRD1 was susceptible to both formulations. The mixed formulations with equal parts PLGA25:PLGA50 loaded with ciprofloxacin produced a zone of inhibition (i.e., 25 mm). This again indicated that P. aeruginosa FRD1 was susceptible to ciprofloxacin. The formulations tested against MRSA showed that only gentamicin-loaded formulations produced intermediate results, and that ciprofloxacin-loaded formulations were ineffective. The PLGA25 and the PLGA50 NP formulations loaded with gentamicin both produced zones of inhibition of 13 mm. This indicated that MRSA was intermediate to both the formulations. The PLGA25:PLGA50 loaded with gentamicin produced a zone of inhibition of 14 mm, which again showed that MRSA was intermediate to this formulation. Overall, these PLGA NP formulations showed the sustained antibacterial potential of a burst release, followed by a sustained release of antibiotics from antibiotics loaded PLGA NPs in a controlled manner. In the future, this can help prevent the emergence of recurrent infections in the treatment of chronic wounds and reduce the number of medical dressing changes.
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Affiliation(s)
- Argerie Guevara
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
- Berthiaume Institute for Precision Health, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Kevin Armknecht
- Berthiaume Institute for Precision Health, University of Notre Dame, Notre Dame, IN 46556, USA
- Department of Pre-Professional Studies, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Carlie Kudary
- Berthiaume Institute for Precision Health, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Prakash Nallathamby
- Berthiaume Institute for Precision Health, University of Notre Dame, Notre Dame, IN 46556, USA
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
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Son T, Kim M, Choi M, Nam SH, Yoo A, Lee H, Han EH, Hong KS, Park HS. Advancing fluorescence imaging: enhanced control of cyanine dye-doped silica nanoparticles. J Nanobiotechnology 2024; 22:347. [PMID: 38898529 PMCID: PMC11188253 DOI: 10.1186/s12951-024-02638-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Accepted: 06/14/2024] [Indexed: 06/21/2024] Open
Abstract
BACKGROUND Silica nanoparticles (SNPs) have immense potential in biomedical research, particularly in drug delivery and imaging applications, owing to their stability and minimal interactions with biological entities such as tissues or cells. RESULTS With synthesized and characterized cyanine-dye-doped fluorescent SNPs (CSNPs) using cyanine 3.5, 5.5, and 7 (Cy3.5, Cy5.5, and Cy7). Through systematic analysis, we discerned variations in the surface charge and fluorescence properties of the nanoparticles contingent on the encapsulated dye-(3-aminopropyl)triethoxysilane conjugate, while their size and shape remained constant. The fluorescence emission spectra exhibited a redshift correlated with increasing dye concentration, which was attributed to cascade energy transfer and self-quenching effects. Additionally, the fluorescence signal intensity showed a linear relationship with the particle concentration, particularly at lower dye equivalents, indicating a robust performance suitable for imaging applications. In vitro assessments revealed negligible cytotoxicity and efficient cellular uptake of the nanoparticles, enabling long-term tracking and imaging. Validation through in vivo imaging in mice underscored the versatility and efficacy of CSNPs, showing single-switching imaging capabilities and linear signal enhancement within subcutaneous tissue environment. CONCLUSIONS This study provides valuable insights for designing fluorescence imaging and optimizing nanoparticle-based applications in biomedical research, with potential implications for targeted drug delivery and in vivo imaging of tissue structures and organs.
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Affiliation(s)
- Taewoong Son
- Biopharmaceutical Research Center, Ochang Institute of Biological and Environmental Science, Korea Basic Science Institute (KBSI), Cheongju, 28119, Republic of Korea
- Graduate School of Analytical Science and Technology (GRAST), Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Minseo Kim
- Laboratory of Nanophotonics & Nanospectroscopic Imaging, Korea Research Institute of Chemical Technology, Daejeon, 34114, Republic of Korea
- Department of Chemistry, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Minsuk Choi
- Laboratory of Nanophotonics & Nanospectroscopic Imaging, Korea Research Institute of Chemical Technology, Daejeon, 34114, Republic of Korea
| | - Sang Hwan Nam
- Laboratory of Nanophotonics & Nanospectroscopic Imaging, Korea Research Institute of Chemical Technology, Daejeon, 34114, Republic of Korea
| | - Ara Yoo
- Biopharmaceutical Research Center, Ochang Institute of Biological and Environmental Science, Korea Basic Science Institute (KBSI), Cheongju, 28119, Republic of Korea
| | - Hyunseung Lee
- Biopharmaceutical Research Center, Ochang Institute of Biological and Environmental Science, Korea Basic Science Institute (KBSI), Cheongju, 28119, Republic of Korea
| | - Eun Hee Han
- Biopharmaceutical Research Center, Ochang Institute of Biological and Environmental Science, Korea Basic Science Institute (KBSI), Cheongju, 28119, Republic of Korea
- Korea University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Kwan Soo Hong
- Biopharmaceutical Research Center, Ochang Institute of Biological and Environmental Science, Korea Basic Science Institute (KBSI), Cheongju, 28119, Republic of Korea.
- Graduate School of Analytical Science and Technology (GRAST), Chungnam National University, Daejeon, 34134, Republic of Korea.
- Department of Chemistry, Chung-Ang University, Seoul, 06974, Republic of Korea.
| | - Hye Sun Park
- Biopharmaceutical Research Center, Ochang Institute of Biological and Environmental Science, Korea Basic Science Institute (KBSI), Cheongju, 28119, Republic of Korea.
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Olesk J, Donahue D, Ross J, Sheehan C, Bennett Z, Armknecht K, Kudary C, Hopf J, Ploplis VA, Castellino FJ, Lee SW, Nallathamby PD. Antimicrobial peptide-conjugated phage-mimicking nanoparticles exhibit potent bactericidal action against Streptococcus pyogenes in murine wound infection models. NANOSCALE ADVANCES 2024; 6:1145-1162. [PMID: 38356633 PMCID: PMC10863710 DOI: 10.1039/d3na00620d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 01/08/2024] [Indexed: 02/16/2024]
Abstract
Streptococcus pyogenes is a causative agent for strep throat, impetigo, and more invasive diseases. The main reason for the treatment failure of streptococcal infections is increased antibiotic resistance. In recent years, infectious diseases caused by pyogenic streptococci resistant to multiple antibiotics have been rising with a significant impact on public health and the veterinary industry. The development of antibiotic resistance and the resulting emergence of multidrug-resistant bacteria have become primary threats to the public health system, commonly leading to nosocomial infections. Many researchers have turned their focus to developing alternative classes of antibacterial agent based on various nanomaterials. We have developed an antibiotic-free nanoparticle system inspired by naturally occurring bacteriophages to fight antibiotic-resistant bacteria. Our phage-mimicking nanoparticles (PhaNPs) display structural mimicry of protein-turret distribution on the head structure of bacteriophages. By mimicking phages, we can take advantage of their evolutionary constant shape and high antibacterial activity while avoiding the immune reactions of the human body experienced by biologically derived phages. We describe the synthesis of hierarchically arranged core-shell nanoparticles, with a silica core conjugated with silver-coated gold nanospheres to which we have chemisorbed the synthetic antimicrobial peptide Syn-71 on the PhaNPs surface, and increased the rapidity of the antibacterial activity of the nanoparticles (PhaNP@Syn71). The antibacterial effect of the PhaNP@Syn71 was tested in vitro and in vivo in mouse wound infection models. In vitro, results showed a dose-dependent complete inhibition of bacterial growth (>99.99%). Cytocompatibility testing on HaCaT human skin keratinocytes showed minimal cytotoxicity of PhaNP@Syn71, being comparable to the vehicle cytotoxicity levels even at higher concentrations, thus proving that our design is biocompatible with human cells. There was a minimum cutoff dosage above which there was no evolution of resistance after prolonged exposure to sub-MIC dosages of PhaNP@Syn71. Application of PhaNP@Syn71 to a mouse wound infection model exhibited high biocompatibility in vivo while showing immediate stabilization of the wound size, and infection free wound healing. Our results suggest the robust utility of antimicrobial peptide-conjugated phage-mimicking nanoparticles as a highly effective antibacterial system that can combat bacterial infections consistently while avoiding the emergence of resistant bacterial strains.
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Affiliation(s)
- Johanna Olesk
- Department of Aerospace and Mechanical Engineering, University of Notre Dame Notre Dame Indiana USA +1 574 631 7868
| | - Deborah Donahue
- W. M. Keck Center for Transgene Research, University of Notre Dame Notre Dame Indiana USA
| | - Jessica Ross
- Department of Biological Sciences, University of Notre Dame Notre Dame Indiana USA
| | - Conor Sheehan
- Department of Chemistry and Biochemistry, University of Notre Dame Notre Dame Indiana USA
| | - Zach Bennett
- Department of Aerospace and Mechanical Engineering, University of Notre Dame Notre Dame Indiana USA +1 574 631 7868
| | - Kevin Armknecht
- Department of Pre-Professional Studies, University of Notre Dame Notre Dame Indiana USA
| | - Carlie Kudary
- Berthiaume Institute for Precision Health, University of Notre Dame Notre Dame Indiana USA
| | - Juliane Hopf
- Berthiaume Institute for Precision Health, University of Notre Dame Notre Dame Indiana USA
| | - Victoria A Ploplis
- W. M. Keck Center for Transgene Research, University of Notre Dame Notre Dame Indiana USA
| | - Francis J Castellino
- W. M. Keck Center for Transgene Research, University of Notre Dame Notre Dame Indiana USA
| | - Shaun W Lee
- Department of Biological Sciences, University of Notre Dame Notre Dame Indiana USA
| | - Prakash D Nallathamby
- Department of Aerospace and Mechanical Engineering, University of Notre Dame Notre Dame Indiana USA +1 574 631 7868
- Berthiaume Institute for Precision Health, University of Notre Dame Notre Dame Indiana USA
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Waters M, Hopf J, Tam E, Wallace S, Chang J, Bennett Z, Aquino H, Roeder RK, Helquist P, Stack MS, Nallathamby PD. Biocompatible, Multi-Mode, Fluorescent, T2 MRI Contrast Magnetoelectric-Silica Nanoparticles (MagSiNs), for On-Demand Doxorubicin Delivery to Metastatic Cancer Cells. Pharmaceuticals (Basel) 2022; 15:1216. [PMID: 36297329 PMCID: PMC9607636 DOI: 10.3390/ph15101216] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 09/25/2022] [Accepted: 09/27/2022] [Indexed: 11/06/2022] Open
Abstract
There is a need to improve current cancer treatment regimens to reduce systemic toxicity, to positively impact the quality-of-life post-treatment. We hypothesized the negation of off-target toxicity of anthracyclines (e.g., Doxorubicin) by delivering Doxorubicin on magneto-electric silica nanoparticles (Dox-MagSiNs) to cancer cells. Dox-MagSiNs were completely biocompatible with all cell types and are therapeutically inert till the release of Doxorubicin from the MagSiNs at the cancer cells location. The MagSiNs themselves are comprised of biocompatible components with a magnetostrictive cobalt ferrite core (4−6 nm) surrounded by a piezoelectric fused silica shell of 1.5 nm to 2 nm thickness. The MagSiNs possess T2-MRI contrast properties on par with RESOVIST™ due to their cobalt ferrite core. Additionally, the silica shell surrounding the core was volume loaded with green or red fluorophores to fluorescently track the MagSiNs in vitro. This makes the MagSiNs a suitable candidate for trackable, drug nanocarriers. We used metastatic triple-negative breast cancer cells (MDAMB231), ovarian cancer cells (A2780), and prostate cancer cells (PC3) as our model cancer cell lines. Human umbilical vein endothelial cells (HUVEC) were used as control cell lines to represent blood-vessel cells that suffer from the systemic toxicity of Doxorubicin. In the presence of an external magnetic field that is 300× times lower than an MRI field, we successfully nanoporated the cancer cells, then triggered the release of 500 nM of doxorubicin from Dox-MagSiNs to successfully kill >50% PC3, >50% A2780 cells, and killed 125% more MDAMB231 cells than free Dox.HCl. In control HUVECs, the Dox-MagSiNs did not nanoporate into the HUVECS and did not exhibited any cytotoxicity at all when there was no triggered release of Dox.HCl. Currently, the major advantages of our approach are, (i) the MagSiNs are biocompatible in vitro and in vivo; (ii) the label-free nanoporation of Dox-MagSiNs into cancer cells and not the model blood vessel cell line; (iii) the complete cancellation of the cytotoxicity of Doxorubicin in the Dox-MagSiNs form; (iv) the clinical impact of such a nanocarrier will be that it will be possible to increase the current upper limit for cumulative-dosages of anthracyclines through multiple dosing, which in turn will improve the anti-cancer efficacy of anthracyclines.
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Affiliation(s)
- Margo Waters
- Department of Pre-Professional Studies, University of Notre Dame, Notre Dame, IN 46556, USA
- The Berthiaume Institute for Precision Health, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Juliane Hopf
- The Berthiaume Institute for Precision Health, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Emma Tam
- The Berthiaume Institute for Precision Health, University of Notre Dame, Notre Dame, IN 46556, USA
- Department of Art, Art History & Design, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Stephanie Wallace
- The Berthiaume Institute for Precision Health, University of Notre Dame, Notre Dame, IN 46556, USA
- Department of Mathematics and Pre-Professional Studies, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Jordan Chang
- Department of Pre-Professional Studies, University of Notre Dame, Notre Dame, IN 46556, USA
- The Berthiaume Institute for Precision Health, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Zach Bennett
- The Berthiaume Institute for Precision Health, University of Notre Dame, Notre Dame, IN 46556, USA
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Hadrian Aquino
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Ryan K. Roeder
- Bioengineering Graduate Program in the Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Paul Helquist
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA
| | - M. Sharon Stack
- The Berthiaume Institute for Precision Health, University of Notre Dame, Notre Dame, IN 46556, USA
- Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Prakash D. Nallathamby
- The Berthiaume Institute for Precision Health, University of Notre Dame, Notre Dame, IN 46556, USA
- Bioengineering Graduate Program in the Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
- Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46556, USA
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Gil CJ, Li L, Hwang B, Cadena M, Theus AS, Finamore TA, Bauser-Heaton H, Mahmoudi M, Roeder RK, Serpooshan V. Tissue engineered drug delivery vehicles: Methods to monitor and regulate the release behavior. J Control Release 2022; 349:143-155. [PMID: 35508223 DOI: 10.1016/j.jconrel.2022.04.044] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 04/24/2022] [Accepted: 04/27/2022] [Indexed: 12/15/2022]
Abstract
Tissue engineering is a rapidly evolving, multidisciplinary field that aims at generating or regenerating 3D functional tissues for in vitro disease modeling and drug screening applications or for in vivo therapies. A variety of advanced biological and engineering methods are increasingly being used to further enhance and customize the functionality of tissue engineered scaffolds. To this end, tunable drug delivery and release mechanisms are incorporated into tissue engineering modalities to promote different therapeutic processes, thus, addressing challenges faced in the clinical applications. In this review, we elaborate the mechanisms and recent developments in different drug delivery vehicles, including the quantum dots, nano/micro particles, and molecular agents. Different loading strategies to incorporate the therapeutic reagents into the scaffolding structures are explored. Further, we discuss the main mechanisms to tune and monitor/quantify the release kinetics of embedded drugs from engineered scaffolds. We also survey the current trend of drug delivery using stimuli driven biopolymer scaffolds to enable precise spatiotemporal control of the release behavior. Recent advancements, challenges facing current scaffold-based drug delivery approaches, and areas of future research are discussed.
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Affiliation(s)
- Carmen J Gil
- Department of Biomedical Engineering, Emory University School of Medicine and Georgia Institute of Technology, Atlanta, GA 30322, USA
| | - Lan Li
- Bioengineering Graduate Program, Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Boeun Hwang
- Department of Biomedical Engineering, Emory University School of Medicine and Georgia Institute of Technology, Atlanta, GA 30322, USA
| | - Melissa Cadena
- Department of Biomedical Engineering, Emory University School of Medicine and Georgia Institute of Technology, Atlanta, GA 30322, USA
| | - Andrea S Theus
- Department of Biomedical Engineering, Emory University School of Medicine and Georgia Institute of Technology, Atlanta, GA 30322, USA
| | - Tyler A Finamore
- Bioengineering Graduate Program, Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Holly Bauser-Heaton
- Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322, USA; Children's Healthcare of Atlanta, Atlanta, GA 30322, USA; Sibley Heart Center at Children's Healthcare of Atlanta, Atlanta, GA 30322, USA
| | - Morteza Mahmoudi
- Department of Radiology and Precision Health Program, Michigan State University, East Lansing, MI 48864, USA
| | - Ryan K Roeder
- Bioengineering Graduate Program, Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Vahid Serpooshan
- Department of Biomedical Engineering, Emory University School of Medicine and Georgia Institute of Technology, Atlanta, GA 30322, USA; Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322, USA; Children's Healthcare of Atlanta, Atlanta, GA 30322, USA.
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van der Wee EB, Fokkema J, Kennedy CL, Del Pozo M, de Winter DAM, Speets PNA, Gerritsen HC, van Blaaderen A. 3D test sample for the calibration and quality control of stimulated emission depletion (STED) and confocal microscopes. Commun Biol 2021; 4:909. [PMID: 34302049 PMCID: PMC8302645 DOI: 10.1038/s42003-021-02432-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 07/05/2021] [Indexed: 02/07/2023] Open
Abstract
Multiple samples are required to monitor and optimize the quality and reliability of quantitative measurements of stimulated emission depletion (STED) and confocal microscopes. Here, we present a single sample to calibrate these microscopes, align their laser beams and measure their point spread function (PSF) in 3D. The sample is composed of a refractive index matched colloidal crystal of silica beads with fluorescent and gold cores. The microscopes can be calibrated in three dimensions using the periodicity of the crystal; the alignment of the laser beams can be checked using the reflection of the gold cores; and the PSF can be measured at multiple positions and depths using the fluorescent cores. It is demonstrated how this sample can be used to visualize and improve the quality of STED and confocal microscopy images. The sample is adjustable to meet the requirements of different NA objectives and microscopy techniques and additionally can be used to evaluate refractive index mismatches as a function of depth quantitatively.
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Affiliation(s)
- Ernest B van der Wee
- Soft Condensed Matter and Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
- Department of Imaging Physics, Delft University of Technology, Delft, the Netherlands
| | - Jantina Fokkema
- Soft Condensed Matter and Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
| | - Chris L Kennedy
- Soft Condensed Matter and Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
| | - Marc Del Pozo
- Soft Condensed Matter and Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
- Stimuli-responsive Functional Materials and Devices, Department of Chemical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands
| | - D A Matthijs de Winter
- Soft Condensed Matter and Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
- Environmental Hydrogeology, Department of Earth Sciences, Utrecht University, Utrecht, the Netherlands
| | - Peter N A Speets
- Soft Condensed Matter and Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
- Department of Imaging Physics, Delft University of Technology, Delft, the Netherlands
| | - Hans C Gerritsen
- Soft Condensed Matter and Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands
| | - Alfons van Blaaderen
- Soft Condensed Matter and Molecular Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht, the Netherlands.
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Jung E, Hui X, Zhu H, Zhang A, Wang W, Buchholz B, Maibach H. Effect of iron and silica nanoparticles’ size on in vitro human skin binding and penetration. TOXICOLOGY RESEARCH AND APPLICATION 2019. [DOI: 10.1177/2397847319893054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
This in vitro skin study determined absorption, diffusion, and binding rates of four [14C]-labeled nanoparticles (NPs): 12 nm Fe3O4, 32 nm Fe3O4@SiO2, 33 nm SiO2, and 78 nm SiO2 in each layer of human cadaver skin. In vitro microdialysis device and flow-through skin diffusion system were used to measure the binding affinity to the stratum corneum (SC) and permeability into/through skin layer of the four NPs with different physical–chemical properties, respectively, in short (30 min) and/or long (24 hours) exposures. Results show that NP size is an important factor affecting NP percutaneous absorption. The 12 nm Fe3O4 NPs reached the SC and viable epidermis; 32 nm Fe3O4@SiO2 core/shell NPs only reached SC. However, 33 nm and 78 nm silica NPs did not permeate SC. Similar patterns were observed for NP binding affinity to SC and dermatopharmacokinetic analysis using the tape stripping method. The binding affinity determination may be a useful method to efficiently screen skin penetration of NPs.
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Affiliation(s)
- Eui Jung
- Department of Dermatology, School of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Xiaoying Hui
- Department of Dermatology, School of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Hanjiang Zhu
- Department of Dermatology, School of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Alissa Zhang
- Department of Dermatology, School of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Wei Wang
- Aramco Research Center–Boston, Aramco Services Company, Cambridge, MA, USA
| | - Bruce Buchholz
- Lawrence Livermore National Laboratory, Center for Accelerator Mass Spectrometry, Livermore, CA, USA
| | - Howard Maibach
- Department of Dermatology, School of Medicine, University of California San Francisco, San Francisco, CA, USA
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Hopf J, Waters M, Kalwajtys V, Carothers KE, Roeder RK, Shrout JD, Lee SW, Nallathamby PD. Phage-mimicking antibacterial core-shell nanoparticles. NANOSCALE ADVANCES 2019; 1:4812-4826. [PMID: 36133139 PMCID: PMC9417579 DOI: 10.1039/c9na00461k] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 10/08/2019] [Indexed: 06/16/2023]
Abstract
The increasing frequency of nosocomial infections caused by antibiotic-resistant microorganisms concurrent with the stagnant discovery of new classes of antibiotics has made the development of new antibacterial agents a critical priority. Our approach is an antibiotic-free strategy drawing inspiration from bacteriophages to combat antibiotic-resistant bacteria. We developed a nanoparticle-based antibacterial system that structurally mimics the protein-turret distribution on the head structure of certain bacteriophages and explored a combination of different materials arranged hierarchically to inhibit bacterial growth and ultimately kill pathogenic bacteria. Here, we describe the synthesis of phage-mimicking antibacterial nanoparticles (ANPs) consisting of silver-coated gold nanospheres distributed randomly on a silica core. The silver-coating was deposited in an anisotropic fashion on the gold nanospheres. Structurally, our nanoparticles mimicked the bacteriophages of the family Microviridae by up to 88%. These phage-mimicking ANPs were tested for bactericidal efficacy against four clinically relevant nosocomial pathogens (Staphylococcus aureus USA300, Pseudomonas aeruginosa FRD1, Enterococcus faecalis, and Corynebacterium striatum) and for biocompatibility with skin cells. Bacterial growth of all four bacteria was inhibited (21% to 90%) as well as delayed (by up to 5 h). The Gram-positive organisms were shown to be more sensitive to the nanoparticle treatment. Importantly, the phage-mimicking ANPs did not show any significant cytotoxic effects against human skin keratinocytes. Our results indicate the potential for phage-mimicking antimicrobial nanoparticles as a highly effective, alternative antibacterial agent, which may be suitable for co-administration with existing available formulations.
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Affiliation(s)
- Juliane Hopf
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame Notre Dame IN USA
| | - Margo Waters
- Department of Aerospace and Mechanical Engineering, University of Notre Dame Notre Dame IN USA +1 574 631 7868
| | - Veronica Kalwajtys
- Department of Biological Sciences, University of Notre Dame Notre Dame IN USA
| | - Katelyn E Carothers
- Department of Biological Sciences, University of Notre Dame Notre Dame IN USA
| | - Ryan K Roeder
- Department of Aerospace and Mechanical Engineering, University of Notre Dame Notre Dame IN USA +1 574 631 7868
- Center for Nanoscience and Technology (NDnano), University of Notre Dame Notre Dame IN USA
| | - Joshua D Shrout
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame Notre Dame IN USA
| | - Shaun W Lee
- Department of Biological Sciences, University of Notre Dame Notre Dame IN USA
| | - Prakash D Nallathamby
- Department of Aerospace and Mechanical Engineering, University of Notre Dame Notre Dame IN USA +1 574 631 7868
- Center for Nanoscience and Technology (NDnano), University of Notre Dame Notre Dame IN USA
- Center for Advanced Diagnostics and Therapeutics (AD&T), University of Notre Dame Notre Dame IN USA
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9
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Silicon Nanotubes as Potential Therapeutic Platforms. Pharmaceutics 2019; 11:pharmaceutics11110571. [PMID: 31683869 PMCID: PMC6920902 DOI: 10.3390/pharmaceutics11110571] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/24/2019] [Accepted: 10/28/2019] [Indexed: 02/06/2023] Open
Abstract
Silicon nanotubes (SiNTs) with unique well-defined structural morphologies have been successfully fabricated and recognized as a novel architecture in the nanoscale Si family. While the typical dendritic microstructure of mesoporous silicon prepared anodically has been exploited previously for therapeutics and biosensing, our status of utilizing SiNTs in this regard is still in its infancy. In this review, we focus on the fundamental properties of such nanotubes relevant to therapeutic applications, beginning with a description of our ability to sensitively tune the structure of a given SiNT through synthetic control and the associated detailed in vitro dissolution behavior (reflecting biodegradability). Emphasis is also placed here on the range of functional moieties available to attach to the surface of SiNTs through a summary of current studies involving surface functionalization and strategies that facilitate conjugation with molecules of interest for multiple purposes, including cell labeling, nucleotide attachment, and scaffolding of therapeutic metallic nanoparticles. Experiments addressing our ability to load the interior of a given nanotube with species capable of providing magnetic field-assisted drug delivery are also briefly described. Given the range of diverse properties demonstrated to date, we believe the future to be quite promising for employing SiNTs as therapeutic platforms.
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Retterer ST, Morrell-Falvey JL, Doktycz MJ. Nano-Enabled Approaches to Chemical Imaging in Biosystems. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2018; 11:351-373. [PMID: 29490189 DOI: 10.1146/annurev-anchem-061417-125635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Understanding and predicting how biosystems function require knowledge about the dynamic physicochemical environments with which they interact and alter by their presence. Yet, identifying specific components, tracking the dynamics of the system, and monitoring local environmental conditions without disrupting biosystem function present significant challenges for analytical measurements. Nanomaterials, by their very size and nature, can act as probes and interfaces to biosystems and offer solutions to some of these challenges. At the nanoscale, material properties emerge that can be exploited for localizing biomolecules and making chemical measurements at cellular and subcellular scales. Here, we review advances in chemical imaging enabled by nanoscale structures, in the use of nanoparticles as chemical and environmental probes, and in the development of micro- and nanoscale fluidic devices to define and manipulate local environments and facilitate chemical measurements of complex biosystems. Integration of these nano-enabled methods will lead to an unprecedented understanding of biosystem function.
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Affiliation(s)
- Scott T Retterer
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA;
- Center for Nanophase Materials Science, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | | | - Mitchel J Doktycz
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA;
- Center for Nanophase Materials Science, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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11
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Zhang Y, Nallathamby PD, Vigil GD, Khan AA, Mason DE, Boerckel JD, Roeder RK, Howard SS. Super-resolution fluorescence microscopy by stepwise optical saturation. BIOMEDICAL OPTICS EXPRESS 2018; 9:1613-1629. [PMID: 29675306 PMCID: PMC5905910 DOI: 10.1364/boe.9.001613] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 03/02/2018] [Accepted: 03/05/2018] [Indexed: 05/07/2023]
Abstract
Super-resolution fluorescence microscopy is an important tool in biomedical research for its ability to discern features smaller than the diffraction limit. However, due to its difficult implementation and high cost, the super-resolution microscopy is not feasible in many applications. In this paper, we propose and demonstrate a saturation-based super-resolution fluorescence microscopy technique that can be easily implemented and requires neither additional hardware nor complex post-processing. The method is based on the principle of stepwise optical saturation (SOS), where M steps of raw fluorescence images are linearly combined to generate an image with a [Formula: see text]-fold increase in resolution compared with conventional diffraction-limited images. For example, linearly combining (scaling and subtracting) two images obtained at regular powers extends the resolution by a factor of 1.4 beyond the diffraction limit. The resolution improvement in SOS microscopy is theoretically infinite but practically is limited by the signal-to-noise ratio. We perform simulations and experimentally demonstrate super-resolution microscopy with both one-photon (confocal) and multiphoton excitation fluorescence. We show that with the multiphoton modality, the SOS microscopy can provide super-resolution imaging deep in scattering samples.
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Affiliation(s)
- Yide Zhang
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
| | - Prakash D. Nallathamby
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
- Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46556,
USA
- Notre Dame Center for Nanoscience and Nanotechnology (NDnano), University of Notre Dame, Notre Dame, IN 46556,
USA
| | - Genevieve D. Vigil
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
| | - Aamir A. Khan
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
| | - Devon E. Mason
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
- Departments of Orthopaedic Surgery and Bioengineering, University of Pennsylvania, Philadelphia, PA 19104,
USA
| | - Joel D. Boerckel
- Departments of Orthopaedic Surgery and Bioengineering, University of Pennsylvania, Philadelphia, PA 19104,
USA
| | - Ryan K. Roeder
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
- Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46556,
USA
- Notre Dame Center for Nanoscience and Nanotechnology (NDnano), University of Notre Dame, Notre Dame, IN 46556,
USA
| | - Scott S. Howard
- Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556,
USA
- Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46556,
USA
- Notre Dame Center for Nanoscience and Nanotechnology (NDnano), University of Notre Dame, Notre Dame, IN 46556,
USA
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Wang W, Chang S, Gizzatov A. Toward Reservoir-on-a-Chip: Fabricating Reservoir Micromodels by in Situ Growing Calcium Carbonate Nanocrystals in Microfluidic Channels. ACS APPLIED MATERIALS & INTERFACES 2017; 9:29380-29386. [PMID: 28792207 DOI: 10.1021/acsami.7b10746] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We introduce a novel and simple method to fabricate calcium carbonate (CaCO3) micromodels by in situ growing a thin layer of CaCO3 nanocrystals with a thickness of 1-2 μm in microfluidic channels. This approach enables us to fabricate synthetic CaCO3 reservoir micromodels having surfaces fully covered with calcite, while the dimensions and geometries of the micromodels are controllable on the basis of the original microfluidic channels. We have tuned the wettability of the CaCO3-coated microchannels at simulated oil reservoir conditions without introducing any chemical additives to the system; thus the resulting oil-wet surface makes the micromodel more faithfully resemble a natural carbonate reservoir rock. With the advantage of its excellent optical transparency, the micromodel allows us to directly visualize the complex multiphase flows and geochemical fluid-calcite interactions by spectroscopic and microscopic imaging techniques. The CaCO3-coated microfluidic channels provide new capabilities as a micromodel system to mimic real carbonate reservoir properties, which would allow us to perform a water-oil displacement experiment in small-volume samples for the rapid screening of candidate fluids for enhanced oil recovery (EOR). The immiscible fluid displacement process within carbonate micromodels has been demonstrated showing the water-oil-carbonate interactions at pore-scale in real time by fluorescence microscopic imaging.
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Affiliation(s)
- Wei Wang
- Aramco Research Center-Boston, Aramco Services Company , 400 Technology Square, Cambridge, Massachusetts 02139, United States
| | - Sehoon Chang
- Aramco Research Center-Boston, Aramco Services Company , 400 Technology Square, Cambridge, Massachusetts 02139, United States
| | - Ayrat Gizzatov
- Aramco Research Center-Boston, Aramco Services Company , 400 Technology Square, Cambridge, Massachusetts 02139, United States
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Nallathamby PD, Hopf J, Irimata LE, McGinnity TL, Roeder RK. Preparation of fluorescent Au–SiO2 core–shell nanoparticles and nanorods with tunable silica shell thickness and surface modification for immunotargeting. J Mater Chem B 2016; 4:5418-5428. [DOI: 10.1039/c6tb01659f] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Scalable methods for preparing and modifying Au–SiO2 core–shell nanoparticles provide a platform for engineering size-dependent multifunctional properties for in vivo biomedical applications.
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Affiliation(s)
- Prakash D. Nallathamby
- Department of Aerospace and Mechanical Engineering
- Bioengineering Graduate Program
- University of Notre Dame
- Notre Dame
- USA
| | - Juliane Hopf
- Environmental Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
| | - Lisa E. Irimata
- Department of Aerospace and Mechanical Engineering
- Bioengineering Graduate Program
- University of Notre Dame
- Notre Dame
- USA
| | - Tracie L. McGinnity
- Department of Aerospace and Mechanical Engineering
- Bioengineering Graduate Program
- University of Notre Dame
- Notre Dame
- USA
| | - Ryan K. Roeder
- Department of Aerospace and Mechanical Engineering
- Bioengineering Graduate Program
- University of Notre Dame
- Notre Dame
- USA
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14
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Guo R, Chen X, Zhu X, Dong A, Zhang J. A facile strategy to fabricate covalently linked raspberry-like nanocomposites with pH and thermo tunable structures. RSC Adv 2016. [DOI: 10.1039/c6ra03965k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple and controllable route to prepare covalently bonded raspberry-like composite particles with pH and thermal dual-responsiveness.
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Affiliation(s)
- Ruiwei Guo
- Department of Polymer Science and Engineering
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- China
| | - Xing Chen
- Department of Polymer Science and Engineering
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- China
| | - Xiaolei Zhu
- China National Chemical Corporation
- Beijing
- China
| | - Anjie Dong
- Department of Polymer Science and Engineering
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- China
| | - Jianhua Zhang
- Department of Polymer Science and Engineering
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- China
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15
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Huang H, Yang W, Deng J. Chiral, fluorescent microparticles constructed by optically active helical substituted polyacetylene: preparation and enantioselective recognition ability. RSC Adv 2015. [DOI: 10.1039/c4ra16466k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel chiral fluorescent microparticles derived from helical substituted polyacetylene were prepared. The microparticles showed enantioselective recognition ability in both heterogeneous and homogeneous systems.
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Affiliation(s)
- Huajun Huang
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
- College of Materials Science and Engineering
| | - Wantai Yang
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
- College of Materials Science and Engineering
| | - Jianping Deng
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
- College of Materials Science and Engineering
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