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Ezeh CK, Dibua MEU. Anti-biofilm, drug delivery and cytotoxicity properties of dendrimers. ADMET AND DMPK 2024; 12:239-267. [PMID: 38720923 PMCID: PMC11075165 DOI: 10.5599/admet.1917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 01/24/2023] [Indexed: 05/12/2024] Open
Abstract
Background and purpose Treatments using antimicrobial agents have faced many difficulties as a result of biofilm formation by pathogenic microorganisms. The biofilm matrix formed by these microorganisms prevents antimicrobial agents from penetrating the interior where they can exact their activity effectively. Additionally, extracellular polymeric molecules associated with biofilm surfaces can absorb antimicrobial compounds, lowering their bioavailability. This problem has resulted in the quest for alternative treatment protocols, and the development of nanomaterials and devices through nanotechnology has recently been on the rise. Research approach The literature on dendrimers was searched for in databases such as Google Scholar, PubMed, and ScienceDirect. Key results As a nanomaterial, dendrimers have found useful applications as a drug delivery vehicle for antimicrobial agents against biofilm-mediated infections to circumvent these defense mechanisms. The distinctive properties of dendrimers, such as multi-valency, biocompatibility, high water solubility, non-immunogenicity, and biofilm matrix-/cell membrane fusogenicity (ability to merge with intracellular membrane or other proteins), significantly increase the efficacy of antimicrobial agents and reduce the likelihood of recurring infections. Conclusion This review outlines the current state of dendrimer carriers for biofilm treatments, provides examples of their real-world uses, and examines potential drawbacks.
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Affiliation(s)
- Christian K. Ezeh
- University of Nigeria, Department of Microbiology, Nsukka, Enugu State, Nigeria
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2
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Gaitsch H, Hersh AM, Alomari S, Tyler BM. Dendrimer Technology in Glioma: Functional Design and Potential Applications. Cancers (Basel) 2023; 15:1075. [PMID: 36831418 PMCID: PMC9954563 DOI: 10.3390/cancers15041075] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/02/2023] [Accepted: 02/05/2023] [Indexed: 02/11/2023] Open
Abstract
Novel therapeutic and diagnostic methods are sorely needed for gliomas, which contribute yearly to hundreds of thousands of cancer deaths worldwide. Despite the outpouring of research efforts and funding aimed at improving clinical outcomes for patients with glioma, the prognosis for high-grade glioma, and especially glioblastoma, remains dire. One of the greatest obstacles to improving treatment efficacy and destroying cancer cells is the safe delivery of chemotherapeutic drugs and biologics to the tumor site at a high enough dose to be effective. Over the past few decades, a burst of research has leveraged nanotechnology to overcome this obstacle. There has been a renewed interest in adapting previously understudied dendrimer nanocarriers for this task. Dendrimers are small, highly modifiable, branched structures featuring binding sites for a variety of drugs and ligands. Recent studies have demonstrated the potential for dendrimers and dendrimer conjugates to effectively shuttle therapeutic cargo to the correct tumor location, permeate the tumor, and promote apoptosis of tumor cells while minimizing systemic toxicity and damage to surrounding healthy brain tissue. This review provides a primer on the properties of dendrimers; outlines the mechanisms by which they can target delivery of substances to the site of brain pathology; and delves into current trends in the application of dendrimers to drug and gene delivery, and diagnostic imaging, in glioma. Finally, future directions for translating these in vitro and in vivo findings to the clinic are discussed.
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Affiliation(s)
- Hallie Gaitsch
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
- NIH Oxford-Cambridge Scholars Program, Wellcome—MRC Cambridge Stem Cell Institute and Department of Clinical Neurosciences, University of Cambridge, Cambridge CB2 1TN, UK
| | - Andrew M. Hersh
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Safwan Alomari
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Betty M. Tyler
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
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Olson LB, Hunter NI, Rempel RE, Yu H, Spencer DM, Sullenger CZ, Greene WS, Varanko AK, Eghtesadi SA, Chilkoti A, Pisetsky DS, Everitt JI, Sullenger BA. Mixed-surface polyamidoamine polymer variants retain nucleic acid-scavenger ability with reduced toxicity. iScience 2022; 25:105542. [PMID: 36444294 PMCID: PMC9700028 DOI: 10.1016/j.isci.2022.105542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 06/02/2022] [Accepted: 11/07/2022] [Indexed: 11/11/2022] Open
Abstract
Nucleic acid-binding polymers can have anti-inflammatory properties and beneficial effects in animal models of infection, trauma, cancer, and autoimmunity. PAMAM G3, a polyamidoamine dendrimer, is fully cationic bearing 32 protonable surface amines. However, while PAMAM G3 treatment leads to improved outcomes for mice infected with influenza, at risk of cancer metastasis, or genetically prone to lupus, its administration can lead to serosal inflammation and elevation of biomarkers of liver and kidney damage. Variants with reduced density of cationic charge through the interspersal of hydroxyl groups were evaluated as potentially better-tolerated alternatives. Notably, the variant PAMAM G3 50:50, similar in size as PAMAM G3 but with half the charge, was not toxic in cell culture, less associated with weight loss or serosal inflammation after parenteral administration, and remained effective in reducing glomerulonephritis in lupus-prone mice. Identification of such modified scavengers should facilitate their development as safe and effective anti-inflammatory agents.
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Affiliation(s)
- Lyra B. Olson
- Department of Surgery, Duke University, Durham, NC 27710, USA
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC 27710, USA
| | - Nicole I. Hunter
- Department of Surgery, Duke University, Durham, NC 27710, USA
- Department of Chemistry, Duke University, Durham, NC 27710, USA
| | | | - Haixiang Yu
- Department of Surgery, Duke University, Durham, NC 27710, USA
| | - Diane M. Spencer
- Department of Medicine and Immunology, Division of Rheumatology, Duke University Medical Center, Durham, NC 27710, USA
| | - Cynthia Z. Sullenger
- Department of Surgery, Duke University, Durham, NC 27710, USA
- Department of Biology, Duke University, Durham, NC 27710, USA
| | | | | | - Seyed A. Eghtesadi
- Department of Biomedical Engineering, Duke University, Durham, NC 27710, USA
| | - Ashutosh Chilkoti
- Department of Biomedical Engineering, Duke University, Durham, NC 27710, USA
| | - David S. Pisetsky
- Department of Medicine and Immunology, Division of Rheumatology, Duke University Medical Center, Durham, NC 27710, USA
- Medical Research Service, Veterans Administration Medical Center, Durham, NC 27705, USA
| | | | - Bruce A. Sullenger
- Department of Surgery, Duke University, Durham, NC 27710, USA
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC 27710, USA
- Department of Biomedical Engineering, Duke University, Durham, NC 27710, USA
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4
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Wang J, Li B, Qiu L, Qiao X, Yang H. Dendrimer-based drug delivery systems: history, challenges, and latest developments. J Biol Eng 2022; 16:18. [PMID: 35879774 PMCID: PMC9317453 DOI: 10.1186/s13036-022-00298-5] [Citation(s) in RCA: 77] [Impact Index Per Article: 38.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 07/01/2022] [Indexed: 11/16/2022] Open
Abstract
Since the first dendrimer was reported in 1978 by Fritz Vögtle, dendrimer research has grown exponentially, from synthesis to application in the past four decades. The distinct structure characteristics of dendrimers include nanoscopic size, multi-functionalized surface, high branching, cavernous interior, and so on, making dendrimers themselves ideal drug delivery vehicles. This mini review article provides a brief overview of dendrimer’s history and properties and the latest developments of dendrimers as drug delivery systems. This review focuses on the latest progress in the applications of dendrimers as drug and gene carriers, including 1) active drug release strategies to dissociate drug/gene from dendrimer in response to stimuli; 2) size-adaptive and charge reversal dendrimer delivery systems that can better take advantage of the size and surface properties of dendrimer; 3) bulk and micro/nano dendrimer gel delivery systems. The recent advances in dendrimer formulations may lead to the generation of new drug and gene products and enable the development of novel combination therapies.
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Affiliation(s)
- Juan Wang
- College of Biomedical Engineering, Sichuan University, Chengdu, 610065, Sichuan, China.
| | - Boxuan Li
- Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, China
| | - Li Qiu
- College of Biomedical Engineering, Sichuan University, Chengdu, 610065, Sichuan, China
| | - Xin Qiao
- College of Biomedical Engineering, Sichuan University, Chengdu, 610065, Sichuan, China
| | - Hu Yang
- Linda and Bipin Doshi Department of Chemical and Biochemical Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA
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5
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Nguyen TT, Nguyen BP, Nguyen DTD, Nguyen NH, Nguyen DH, Nguyen CK. Retrovirus Drugs-Loaded PEGylated PAMAM for Prolonging Drug Release and Enhancing Efficiency in HIV Treatment. Polymers (Basel) 2021; 14:114. [PMID: 35012136 PMCID: PMC8747428 DOI: 10.3390/polym14010114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 12/24/2021] [Accepted: 12/27/2021] [Indexed: 12/13/2022] Open
Abstract
Polyamidoamine dendrimer (PAMAM) with its unique characteristics emerges as a potential drug delivery system which can prolong releasing time, reduce the side effects but still retaining treatment efficiency. In this study, methoxy polyethylene glycol modified PAMAM generation 3.0 (G3.0@mPEG) is prepared and characterized via 1H-NMR, FT-IR, and TEM. Subsequently, two antiretroviral agents (ARV) including lamivudine (3TC) and zidovudine (AZT) are individually encapsulated into G3.0@mPEG. The drug-loading efficiency, drug release profile, cytotoxicity and anti-HIV activity are then evaluated. The results illustrate that G3.0@mPEG particles are spherical with a size of 34.5 ± 0.2 nm and a drug loading content of about 9%. Both G3.0@mPEG and ARV@G3.0@mPEG show no cytotoxicity on BJ cells, and G3.0@mPEG loading 3TC and AZT performs sustained drug release behavior which is best fitted with the Korsmeyer-Peppas model. Finally, the anti-HIV activity of ARV via Enzymatic Assay of Pepsin is retained after being loaded into the G3.0@mPEG, in which about 36% of pepsin activity was inhibited by AZT at the concentration of 0.226 mM. Overall, PAMAM G3.0@mPEG is a promising nanocarrier system for loading ARV in HIV treatment and prevention.
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Affiliation(s)
- Thi Thinh Nguyen
- Institute of Drug Quality Control, Ho Chi Minh City 70000, Vietnam;
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi 10000, Vietnam; (N.H.N.); (D.H.N.)
| | - Bao Phu Nguyen
- Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology, Ho Chi Minh City 70000, Vietnam;
| | - Dinh Tien Dung Nguyen
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City 70000, Vietnam;
- Faculty of Natural Science, Duy Tan University, Danang City 550000, Vietnam
| | - Ngoc Hoi Nguyen
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi 10000, Vietnam; (N.H.N.); (D.H.N.)
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City 70000, Vietnam
| | - Dai Hai Nguyen
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi 10000, Vietnam; (N.H.N.); (D.H.N.)
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City 70000, Vietnam
| | - Cuu Khoa Nguyen
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi 10000, Vietnam; (N.H.N.); (D.H.N.)
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City 70000, Vietnam
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6
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Kharwade R, Badole P, Mahajan N, More S. Toxicity And Surface Modification Of Dendrimers: A Critical Review. Curr Drug Deliv 2021; 19:451-465. [PMID: 34674620 DOI: 10.2174/1567201818666211021160441] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 08/21/2021] [Accepted: 10/01/2021] [Indexed: 11/22/2022]
Abstract
As compared to other nano polymers, dendrimers have novel three dimensional, synthetic hyperbranched, nano-polymeric structures. The characteristic of these supramolecular dendritic structures has a high degree of significant surface as well as core functionality in the transportation of drugs for targeted therapy, specifically in host-guest response, gene transfer therapy and imaging of biological systems. However, there are conflicting shreds of evidence regarding biological safety and dendrimers toxicity due to their positive charge at the surface. It includes cytotoxicity, hemolytic toxicity, haematological toxicity, immunogenicity and in vivo toxicity. Therefore to resolve these problems surface modification of the dendrimer group is one of the methods. From that point, this review involves different strategies which reduce the toxicity and improve the biocompatibility of different types of dendrimers. From that viewpoint, we broaden the structural and safe characteristics of the dendrimers in the biomedical and pharmaceutical fields.
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Affiliation(s)
- Rohini Kharwade
- Dadasaheb Balpande College of Pharmacy, Besa, Nagpur, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, (MS). India
| | - Payal Badole
- Dadasaheb Balpande College of Pharmacy, Besa, Nagpur, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, (MS). India
| | - Nilesh Mahajan
- Dadasaheb Balpande College of Pharmacy, Besa, Nagpur, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, (MS). India
| | - Sachin More
- Dadasaheb Balpande College of Pharmacy, Besa, Nagpur, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, (MS). India
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7
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Fan Y, Mohanty S, Zhang Y, Lüchow M, Qin L, Fortuin L, Brauner A, Malkoch M. Dendritic Hydrogels Induce Immune Modulation in Human Keratinocytes and Effectively Eradicate Bacterial Pathogens. J Am Chem Soc 2021; 143:17180-17190. [PMID: 34636555 PMCID: PMC8532153 DOI: 10.1021/jacs.1c07492] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Indexed: 01/09/2023]
Abstract
Infections caused by antibiotic-resistant bacteria are globally a major threat, leading to high mortality rates and increased economic burden. Novel treatment strategies are therefore urgently needed by healthcare providers to protect people. Biomaterials that have inherent antibacterial properties and do not require the use of antibiotics present an attractive and feasible avenue to achieve this goal. Herein, we demonstrate the effect of a new class of cationic hydrogels based on amino-functional hyperbranched dendritic-linear-dendritic copolymers (HBDLDs) exhibiting excellent antimicrobial activity toward a wide range of clinical Gram-positive and Gram-negative bacteria, including drug-resistant strains isolated from wounds. Intriguingly, the hydrogels can induce the expression of the antimicrobial peptides RNase 7 and psoriasin, promoting host-mediated bacterial killing in human keratinocytes (HaCaT). Moreover, treatment with the hydrogels decreased the proinflammatory cytokine IL-1β, reactive nitrogen species (NO), and mitochondrial reactive oxygen species (ROS) in S. aureus-infected HaCaT cells, conjunctively resulting in reduced inflammation.
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Affiliation(s)
- Yanmiao Fan
- School
of Chemical Science and Engineering, Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
| | - Soumitra Mohanty
- Department
of Microbiology, Tumor and Cell Biology, Karolinska Institutet, SE-17165 Stockholm, Sweden
- Division
of Clinical Microbiology, Karolinska University
Hospital, Solna, Stockholm SE-17176, Sweden
| | - Yuning Zhang
- School
of Chemical Science and Engineering, Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
| | - Mads Lüchow
- School
of Chemical Science and Engineering, Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
| | - Liguo Qin
- School
of Chemical Science and Engineering, Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
- Institute
of Design Science and Basic Components, Xían Jiaotong University, 710049 Xían, P. R. China
| | - Lisa Fortuin
- School
of Chemical Science and Engineering, Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
| | - Annelie Brauner
- Department
of Microbiology, Tumor and Cell Biology, Karolinska Institutet, SE-17165 Stockholm, Sweden
- Division
of Clinical Microbiology, Karolinska University
Hospital, Solna, Stockholm SE-17176, Sweden
| | - Michael Malkoch
- School
of Chemical Science and Engineering, Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden
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8
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Kandeel M, Al‐Taher A, Park BK, Kwon H, Al‐Nazawi M. A pilot study of the antiviral activity of anionic and cationic polyamidoamine dendrimers against the Middle East respiratory syndrome coronavirus. J Med Virol 2020; 92:1665-1670. [PMID: 32330296 PMCID: PMC7264540 DOI: 10.1002/jmv.25928] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Accepted: 04/22/2020] [Indexed: 12/14/2022]
Abstract
The Middle East respiratory syndrome coronavirus (MERS-CoV) is an emerging virus that causes infection with a potentially fatal outcome. Dendrimers are highly branched molecules that can be added to antiviral preparations to improve their delivery, as well as their intrinsic antiviral activity. Studies on identifying anti-MERS-CoV agents are few. Three types of polyanionic dendrimers comprising the terminal groups sodium carboxylate (generations 1.5, 2.5, 3.5, and 4.5), hydroxyl (generations 2, 3, 4, and 5), and succinamic acid (generations 2, 3, 4, and 5) and polycationic dendrimers containing primary amine (generations 2, 3, 4, and 5) were used to assess their antiviral activity with the MERS-CoV plaque inhibition assay. The hydroxyl polyanionic set showed a 17.36% to 29.75% decrease in MERS-CoV plaque formation. The most potent inhibition of MERS-CoV plaque formation was seen by G(1.5)-16COONa (40.5% inhibition), followed by G(5)-128SA (39.77% inhibition). In contrast, the cationic dendrimers were cytotoxic to Vero cells. Polyanionic dendrimers can be added to antiviral preparations to improve the delivery of antivirals, as well as the intrinsic antiviral activity.
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Affiliation(s)
- Mahmoud Kandeel
- Department of Biomedical Sciences, College of Veterinary MedicineKing Faisal UniversityAl‐AhsaSaudi Arabia
- Department of Pharmacology, Faculty of Veterinary MedicineKafrelsheikh UniversityKafrelsheikhEgypt
| | - Abdulla Al‐Taher
- Department of Biomedical Sciences, College of Veterinary MedicineKing Faisal UniversityAl‐AhsaSaudi Arabia
| | - Byoung Kwon Park
- Department of MicrobiologyHallym University College of MedicineChuncheonSouth Korea
| | - Hyung‐Joo Kwon
- Department of MicrobiologyHallym University College of MedicineChuncheonSouth Korea
| | - Mohammed Al‐Nazawi
- Department of Biomedical Sciences, College of Veterinary MedicineKing Faisal UniversityAl‐AhsaSaudi Arabia
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Moody CT, Palvai S, Brudno Y. Click cross-linking improves retention and targeting of refillable alginate depots. Acta Biomater 2020; 112:112-121. [PMID: 32497743 PMCID: PMC7365769 DOI: 10.1016/j.actbio.2020.05.033] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 05/23/2020] [Accepted: 05/26/2020] [Indexed: 12/13/2022]
Abstract
Injectable alginate hydrogels have demonstrated utility in tissue engineering and drug delivery applications due in part to their mild gelation conditions, low host responses and chemical versatility. Recently, the potential of these gels has expanded with the introduction of refillable hydrogel depots - alginate gels chemically decorated with click chemistry groups to efficiently capture prodrug refills from the blood. Unfortunately, high degrees of click group substitution on alginate lead to poor viscoelastic properties and loss of ionic cross-linking. In this work, we introduce tetrabicyclononyne (tBCN) agents that covalently cross-link azide-modified alginate hydrogels for tissue engineering and drug delivery application in vivo. Adjusting cross-linker concentration allowed tuning the hydrogel mechanical properties for tissue-specific mechanical strength. The bioorthogonal and specific click reaction creates stable hydrogels with improved in vivo properties, including improved retention at injected sites. Azide-alginate hydrogels cross-linked with tBCN elicited minimal inflammation and maintained structural integrity over several months and efficiently captured therapeutics drug surrogates from the circulation. Taken together, azide-alginate hydrogels cross-linked with tBCN convey the benefits of alginate hydrogels for use in tissue engineering and drug delivery applications of refillable drug delivery depots. STATEMENT OF SIGNIFICANCE: Ionically cross-linked, injectable alginate biomaterials hold promise in many different clinical settings. However, adding new chemical functionality to alginate can disrupt their ionic cross-linking, limiting their utility. We have developed a "click" cross-linking strategy to improve the mechanical properties and tissue function of modified alginate biomaterials and enable them to capture small molecule drugs from the blood. We show that click cross-linked materials remain in place better than ionically cross-linked materials and efficiently capture payloads from the blood. Development of click cross-linking for refillable depots represents a crucial step toward clinical application of this promising drug delivery platform.
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Affiliation(s)
- Christopher T Moody
- Joint Department of Biomedical Engineering, University of North Carolina - Chapel Hill and North Carolina State University - Raleigh, 1840 Entrepreneur Drive, Raleigh, NC 27695, USA
| | - Sandeep Palvai
- Joint Department of Biomedical Engineering, University of North Carolina - Chapel Hill and North Carolina State University - Raleigh, 1840 Entrepreneur Drive, Raleigh, NC 27695, USA
| | - Yevgeny Brudno
- Joint Department of Biomedical Engineering, University of North Carolina - Chapel Hill and North Carolina State University - Raleigh, 1840 Entrepreneur Drive, Raleigh, NC 27695, USA.
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10
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Srinageshwar B, Florendo M, Clark B, Johnson K, Munro N, Peruzzaro S, Antcliff A, Andrews M, Figacz A, Swanson D, Dunbar GL, Sharma A, Rossignol J. A Mixed-Surface Polyamidoamine Dendrimer for In Vitro and In Vivo Delivery of Large Plasmids. Pharmaceutics 2020; 12:E619. [PMID: 32635142 PMCID: PMC7407876 DOI: 10.3390/pharmaceutics12070619] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 06/26/2020] [Accepted: 06/30/2020] [Indexed: 12/13/2022] Open
Abstract
Drug delivery to the brain is highly hindered by the presence of the blood-brain barrier (BBB), which prevents the entry of many potential drugs/biomolecules into the brain. One of the current strategies to achieve gene therapy for neurodegenerative diseases involves direct injection of a viral vector into the brain. There are various disadvantages of viral vectors, including limitations of cargo size and safety concerns. Nanomolecules, such as dendrimers, serve as an excellent alternative to viral delivery. In this study, as proof-of-concept, we used a surface-modified dendrimer complex and delivered large plasmids to cells in vitro and in vivo in healthy rats via intracranial injection. The dendrimers were biodegradable by chemicals found within cells and toxicity assays revealed that the modified dendrimers were much less toxic than unmodified amine-surface dendrimers. As mentioned in our previous publication, these dendrimers with appropriately modified surfaces are safe, can deliver large plasmids to the brain, and can overcome the cargo size limitations associated with viral vectors. The biocompatibility of this dendritic nanomolecule and the ability to finely tune its surface chemistry provides a gene delivery system that could facilitate future in vivo cellular reprograming and other gene therapies.
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Affiliation(s)
- Bhairavi Srinageshwar
- College of Medicine, Central Michigan University, Mount Pleasant, MI 48859, USA; (B.S.); (M.F.); (A.A.); (M.A.); (A.F.)
- Program in Neuroscience, Central Michigan University, Mount Pleasant, MI 48859, USA; (N.M.); (S.P.); (G.L.D.)
- Field Neurosciences Institute Laboratory for Restorative Neurology, Central Michigan University, Mt. Pleasant, MI 48859, USA
| | - Maria Florendo
- College of Medicine, Central Michigan University, Mount Pleasant, MI 48859, USA; (B.S.); (M.F.); (A.A.); (M.A.); (A.F.)
- Program in Neuroscience, Central Michigan University, Mount Pleasant, MI 48859, USA; (N.M.); (S.P.); (G.L.D.)
| | - Brittany Clark
- Department of Chemistry and Biochemistry, Central Michigan University, Mount Pleasant, MI 48859, USA; (B.C.); (K.J.); (D.S.)
| | - Kayla Johnson
- Department of Chemistry and Biochemistry, Central Michigan University, Mount Pleasant, MI 48859, USA; (B.C.); (K.J.); (D.S.)
| | - Nikolas Munro
- Program in Neuroscience, Central Michigan University, Mount Pleasant, MI 48859, USA; (N.M.); (S.P.); (G.L.D.)
- Field Neurosciences Institute Laboratory for Restorative Neurology, Central Michigan University, Mt. Pleasant, MI 48859, USA
| | - Sarah Peruzzaro
- Program in Neuroscience, Central Michigan University, Mount Pleasant, MI 48859, USA; (N.M.); (S.P.); (G.L.D.)
- Field Neurosciences Institute Laboratory for Restorative Neurology, Central Michigan University, Mt. Pleasant, MI 48859, USA
| | - Aaron Antcliff
- College of Medicine, Central Michigan University, Mount Pleasant, MI 48859, USA; (B.S.); (M.F.); (A.A.); (M.A.); (A.F.)
- Program in Neuroscience, Central Michigan University, Mount Pleasant, MI 48859, USA; (N.M.); (S.P.); (G.L.D.)
- Field Neurosciences Institute Laboratory for Restorative Neurology, Central Michigan University, Mt. Pleasant, MI 48859, USA
| | - Melissa Andrews
- College of Medicine, Central Michigan University, Mount Pleasant, MI 48859, USA; (B.S.); (M.F.); (A.A.); (M.A.); (A.F.)
- Program in Neuroscience, Central Michigan University, Mount Pleasant, MI 48859, USA; (N.M.); (S.P.); (G.L.D.)
- Field Neurosciences Institute Laboratory for Restorative Neurology, Central Michigan University, Mt. Pleasant, MI 48859, USA
| | - Alexander Figacz
- College of Medicine, Central Michigan University, Mount Pleasant, MI 48859, USA; (B.S.); (M.F.); (A.A.); (M.A.); (A.F.)
- Program in Neuroscience, Central Michigan University, Mount Pleasant, MI 48859, USA; (N.M.); (S.P.); (G.L.D.)
| | - Douglas Swanson
- Department of Chemistry and Biochemistry, Central Michigan University, Mount Pleasant, MI 48859, USA; (B.C.); (K.J.); (D.S.)
| | - Gary L. Dunbar
- Program in Neuroscience, Central Michigan University, Mount Pleasant, MI 48859, USA; (N.M.); (S.P.); (G.L.D.)
- Field Neurosciences Institute Laboratory for Restorative Neurology, Central Michigan University, Mt. Pleasant, MI 48859, USA
- Department of Psychology, Central Michigan University, Mount Pleasant, MI 48859, USA
- Field Neurosciences Institute, St. Mary’s of Michigan, Saginaw, MI 48604, USA
| | - Ajit Sharma
- Department of Chemistry and Biochemistry, Central Michigan University, Mount Pleasant, MI 48859, USA; (B.C.); (K.J.); (D.S.)
| | - Julien Rossignol
- College of Medicine, Central Michigan University, Mount Pleasant, MI 48859, USA; (B.S.); (M.F.); (A.A.); (M.A.); (A.F.)
- Program in Neuroscience, Central Michigan University, Mount Pleasant, MI 48859, USA; (N.M.); (S.P.); (G.L.D.)
- Field Neurosciences Institute Laboratory for Restorative Neurology, Central Michigan University, Mt. Pleasant, MI 48859, USA
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11
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Maharramov AM, Hasanova UA, Suleymanova IA, Osmanova GE, Hajiyeva NE. The engineered nanoparticles in food chain: potential toxicity and effects. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-1412-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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12
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Abstract
Drug delivery systems are molecular platforms in which an active compound is packed into or loaded on a biocompatible nanoparticle. Such a solution improves the activity of the applied drug or decreases its side effects. Dendrimers are promising molecular platforms for drug delivery due to their unique properties. These macromolecules are known for their defined size, shape, and molecular weight, as well as their monodispersity, the presence of the void space, tailorable structure, internalization by cells, selectivity toward cells and intracellular components, protection of guest molecules, and controllable release of the cargo. Dendrimers were tested as carriers of various molecules and, simultaneously, their toxicity was examined using different cell lines. It was discovered that, in general, dendrimer cytotoxicity depended on the generation, the number of surface groups, and the nature of terminal moieties (anionic, neutral, or cationic). Higher cytotoxicity occurred for higher-generation dendrimers and for dendrimers with positive charges on the surface. In order to decrease the cytotoxicity of dendrimers, scientists started to introduce different chemical modifications on the periphery of the nanomolecule. Dendrimers grafted with polyethylene glycol (PEG), acetyl groups, carbohydrates, and other moieties did not affect cell viability, or did so only slightly, while still maintaining other advantageous properties. Dendrimers clearly have great potential for wide utilization as drug and gene carriers. Moreover, some dendrimers have biological properties per se, being anti-fungal, anti-bacterial, or toxic to cancer cells without affecting normal cells. Therefore, intrinsic cytotoxicity is a comprehensive problem and should be considered individually depending on the potential destination of the nanoparticle.
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13
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White DT, Saxena MT, Mumm JS. Let's get small (and smaller): Combining zebrafish and nanomedicine to advance neuroregenerative therapeutics. Adv Drug Deliv Rev 2019; 148:344-359. [PMID: 30769046 PMCID: PMC6937731 DOI: 10.1016/j.addr.2019.01.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 12/21/2018] [Accepted: 01/28/2019] [Indexed: 01/18/2023]
Abstract
Several key attributes of zebrafish make them an ideal model system for the discovery and development of regeneration promoting therapeutics; most notably their robust capacity for self-repair which extends to the central nervous system. Further, by enabling large-scale drug discovery directly in living vertebrate disease models, zebrafish circumvent critical bottlenecks which have driven drug development costs up. This review summarizes currently available zebrafish phenotypic screening platforms, HTS-ready neurodegenerative disease modeling strategies, zebrafish small molecule screens which have succeeded in identifying regeneration promoting compounds and explores how intravital imaging in zebrafish can facilitate comprehensive analysis of nanocarrier biodistribution and pharmacokinetics. Finally, we discuss the benefits and challenges attending the combination of zebrafish and nanoparticle-based drug optimization, highlighting inspiring proof-of-concept studies and looking toward implementation across the drug development community.
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Affiliation(s)
- David T White
- Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore, MD 21231, USA
| | - Meera T Saxena
- Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore, MD 21231, USA; Luminomics Inc., Baltimore, MD 21286, USA
| | - Jeff S Mumm
- Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore, MD 21231, USA.
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14
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Araújo RVD, Santos SDS, Igne Ferreira E, Giarolla J. New Advances in General Biomedical Applications of PAMAM Dendrimers. Molecules 2018; 23:E2849. [PMID: 30400134 PMCID: PMC6278347 DOI: 10.3390/molecules23112849] [Citation(s) in RCA: 136] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 09/07/2018] [Accepted: 09/07/2018] [Indexed: 12/25/2022] Open
Abstract
Dendrimers are nanoscopic compounds, which are monodispersed, and they are generally considered as homogeneous. PAMAM (polyamidoamine) was introduced in 1985, by Donald A. Tomalia, as a new class of polymers, named 'starburst polymers'. This important contribution of Professor Tomalia opened a new research field involving nanotechnological approaches. From then on, many groups have been using PAMAM for diverse applications in many areas, including biomedical applications. The possibility of either linking drugs and bioactive compounds, or entrapping them into the dendrimer frame can improve many relevant biological properties, such as bioavailability, solubility, and selectivity. Directing groups to reach selective delivery in a specific organ is one of the advanced applications of PAMAM. In this review, structural and safety aspects of PAMAM and its derivatives are discussed, and some relevant applications are briefly presented. Emphasis has been given to gene delivery and targeting drugs, as advanced delivery systems using PAMAM and an incentive for its use on neglected diseases are briefly mentioned.
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Affiliation(s)
- Renan Vinicius de Araújo
- Laboratory of Design and Synthesis of Chemotherapeutics Potentially Active in Neglected Diseases (LAPEN), Department of Pharmacy, Faculty of Pharmaceutical Sciences, University of São Paulo-USP, 580⁻Building 13, São Paulo SP 05508-900, Brazil.
| | - Soraya da Silva Santos
- Laboratory of Design and Synthesis of Chemotherapeutics Potentially Active in Neglected Diseases (LAPEN), Department of Pharmacy, Faculty of Pharmaceutical Sciences, University of São Paulo-USP, 580⁻Building 13, São Paulo SP 05508-900, Brazil.
| | - Elizabeth Igne Ferreira
- Laboratory of Design and Synthesis of Chemotherapeutics Potentially Active in Neglected Diseases (LAPEN), Department of Pharmacy, Faculty of Pharmaceutical Sciences, University of São Paulo-USP, 580⁻Building 13, São Paulo SP 05508-900, Brazil.
| | - Jeanine Giarolla
- Laboratory of Design and Synthesis of Chemotherapeutics Potentially Active in Neglected Diseases (LAPEN), Department of Pharmacy, Faculty of Pharmaceutical Sciences, University of São Paulo-USP, 580⁻Building 13, São Paulo SP 05508-900, Brazil.
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15
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Liegertová M, Wrobel D, Herma R, Müllerová M, Šťastná LČ, Cuřínová P, Strašák T, Malý M, Čermák J, Smejkal J, Štofik M, Maly J. Evaluation of toxicological and teratogenic effects of carbosilane glucose glycodendrimers in zebrafish embryos and model rodent cell lines. Nanotoxicology 2018; 12:797-818. [DOI: 10.1080/17435390.2018.1475582] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Michaela Liegertová
- Faculty of Science, Jan Evangelista Purkyne University, Usti nad Labem, Czech Republic
| | - Dominika Wrobel
- Faculty of Science, Jan Evangelista Purkyne University, Usti nad Labem, Czech Republic
| | - Regina Herma
- Faculty of Science, Jan Evangelista Purkyne University, Usti nad Labem, Czech Republic
| | - Monika Müllerová
- Institute of Chemical Process Fundamentals of the CAS, Prague, Czech Republic
| | | | - Petra Cuřínová
- Institute of Chemical Process Fundamentals of the CAS, Prague, Czech Republic
| | - Tomáš Strašák
- Institute of Chemical Process Fundamentals of the CAS, Prague, Czech Republic
| | - Marek Malý
- Faculty of Science, Jan Evangelista Purkyne University, Usti nad Labem, Czech Republic
| | - Jan Čermák
- Faculty of Science, Jan Evangelista Purkyne University, Usti nad Labem, Czech Republic
- Institute of Chemical Process Fundamentals of the CAS, Prague, Czech Republic
| | - Jiří Smejkal
- Faculty of Science, Jan Evangelista Purkyne University, Usti nad Labem, Czech Republic
| | - Marcel Štofik
- Faculty of Science, Jan Evangelista Purkyne University, Usti nad Labem, Czech Republic
| | - Jan Maly
- Faculty of Science, Jan Evangelista Purkyne University, Usti nad Labem, Czech Republic
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16
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Amani A, Zare N, Asadi A, Asghari-Zakaria R. Ultrasound-enhanced gene delivery to alfalfa cells by hPAMAM dendrimer nanoparticles. Turk J Biol 2018; 42:63-75. [PMID: 30814871 DOI: 10.3906/biy-1706-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Cationic polyamidoamine (PAMAM) dendrimers are highly branched nanoparticles with unique molecular properties, which make them promising nanocarriers for gene delivery into cells. This research evaluated the ability of hyperbranched PAMAM (hPAMAM)-G2 with a diethylenetriamine core to interact with DNA, its protection from ultrasonic damage, and delivery to alfalfa cells. Additionally, the effects of ultrasound on the efficacy of hPAMAM-G2 for the delivery and expression of the gus A gene in the alfalfa cells were investigated. The electrophoresis retardation of plasmid DNA occurred at an N/P ratio (where N is the number of hPAMAM nitrogen atoms and P is the number of DNA phosphorus atoms) of 3 and above, and hPAMAM-G2 dendrimers completely immobilized the DNA at an N/P ratio of 4. The analysis of the DNA dissociated from the dendriplexes revealed a partial protection of the DNA from ultrasound damage at N/P ratios lower than 2, and with increasing N/P ratios, the DNA was better protected. Sonication of the alfalfa cells in the presence of ssDNA-FITC-hPAMAM increased the ssDNA delivery efficiency to 36%, which was significantly higher than that of ssDNA-FITC-hPAMAM without sonication. Additionally, the efficiency of transfection and the expression of the gus A gene were dependent on the N/P ratio and the highest efficiency (1.4%) was achieved at an N/P ratio of 10. The combination of 120 s of ultrasound and hPAMAM-DNA increased the gusA gene transfection and expression to 3.86%.
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Affiliation(s)
- Amin Amani
- Department of Agronomy and Plant Breeding, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili , Ardabil , Iran
| | - Nasser Zare
- Department of Agronomy and Plant Breeding, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili , Ardabil , Iran
| | - Asadollah Asadi
- Department of Biology, Faculty of Basic Sciences, University of Mohaghegh Ardabili , Ardabili , Iran
| | - Rasool Asghari-Zakaria
- Department of Agronomy and Plant Breeding, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili , Ardabil , Iran
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17
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Hashempour Alamdari N, Alaei-Beirami M, Sadat Shandiz SA, Hejazinia H, Rasouli R, Saffari M, Sadat Ebrahimi SE, Assadi A, Shafiee Ardestani M. Gd 3+-Asparagine-Anionic Linear Globular Dendrimer Second-Generation G2 Complexes: Novel Nanobiohybrid Theranostics. CONTRAST MEDIA & MOLECULAR IMAGING 2017; 2017:3625729. [PMID: 29097918 PMCID: PMC5635473 DOI: 10.1155/2017/3625729] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 03/15/2017] [Indexed: 01/06/2023]
Abstract
Designing a unique theranostic biocompatible, biodegradable, and cost-effective agent which is easy to be synthesized as a biohybrid material was the aim of this study. In this matter, asparagine attached to anionic linear globular dendrimer G2 (as a biocompatible, biodegradable, and cost-effective agent which is negatively charged nanosized and water soluble polymer that outweighs other traditionally used dendrimers) and finally contrast agent (Gd3+) was loaded (which made complexes) in synthesized asparagine-dendrimer. Observations revealed that, in addition to successful colon cancer and brain targeting, Gd3+-dendrimer-asparagine, the proposed theranostic agent, could increase T1 MR relaxation times, decrease T2 MR relaxation times significantly, and improve contrast of image as well as illustrating good cellular uptake based on florescent microscopy/flow cytometry and ICP-mass data. In addition to that, it increased tumor growth inhibition percentage (TGI%) significantly compared to FDA approved contrast agent, Magnevist. Totally, Gd3+-anionic linear globular dendrimer G2-asparagine could be introduced to the cancer imaging/therapy (theranostics) protocols after in vivo MR and fluorescent analysis and passing clinical trials. Hence, this nanotheranostic agent would be a promising candidate for brain drug delivery and imaging in the future.
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Affiliation(s)
- Nasim Hashempour Alamdari
- Department of Radiopharmacy and Medicinal Chemistry, Pharmaceutical Sciences Branch, Islamic Azad University, Tehran, Iran
| | - Mahmood Alaei-Beirami
- Drug Applied Research Center and Students' Research Committee, Tabriz University of Medical Science, Tabriz, Iran
| | | | - Hadi Hejazinia
- Department of Radiopharmacy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 1417614411, Iran
| | - Rahimeh Rasouli
- Department of Medical Nanotechnology, School of Medicine, International Campus, Tehran University of Medical Sciences, Tehran, Iran
| | - Mostafa Saffari
- Department of Medical Nanotechnology, School of Medicine, International Campus, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Artin Assadi
- Department of Radiopharmacy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 1417614411, Iran
| | - Mehdi Shafiee Ardestani
- Department of Radiopharmacy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 1417614411, Iran
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18
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Martinez CS, Igartúa DE, Calienni MN, Feas DA, Siri M, Montanari J, Chiaramoni NS, Alonso SDV, Prieto MJ. Relation between biophysical properties of nanostructures and their toxicity on zebrafish. Biophys Rev 2017; 9:775-791. [PMID: 28884420 DOI: 10.1007/s12551-017-0294-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 07/27/2017] [Indexed: 12/25/2022] Open
Abstract
In recent years, the use of commercial nanoparticles in different industry and health fields has increased exponentially. However, the uncontrolled application of nanoparticles might present a potential risk to the environment and health. Toxicity of these nanoparticles is usually evaluated by a fast screening assay in zebrafish (Danio rerio). The use of this vertebrate animal model has grown due to its small size, great adaptability, high fertilization rate and fast external development of transparent embryos. In this review, we describe the toxicity of different micro- and nanoparticles (carbon nanotubes, dendrimers, emulsions, liposomes, metal nanoparticles, and solid lipid nanoparticles) associated to their biophysical properties using this model. The main biophysical properties studied are size, charge and surface potential due to their impact on the environment and health effects. The review also discusses the correlation of the effects of the different nanoparticles on zebrafish. Special focus is made on morphological abnormalities, altered development and abnormal behavior. The last part of the review debates changes that should be made in future directions in order to improve the use of the zebrafish model to assess nanotoxicity.
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Affiliation(s)
- C S Martinez
- Laboratorio de Biomembranas LBM-GBEyB-IMBICE-CONICET, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires, Argentina
| | - D E Igartúa
- Laboratorio de Biomembranas LBM-GBEyB-IMBICE-CONICET, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires, Argentina
| | - M N Calienni
- Laboratorio de Biomembranas LBM-GBEyB-IMBICE-CONICET, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires, Argentina
| | - D A Feas
- Laboratorio de Biomembranas LBM-GBEyB-IMBICE-CONICET, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires, Argentina
| | - M Siri
- Laboratorio de Biomembranas LBM-GBEyB-IMBICE-CONICET, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires, Argentina
| | - J Montanari
- Laboratorio de Biomembranas LBM-GBEyB-IMBICE-CONICET, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires, Argentina
| | - N S Chiaramoni
- Laboratorio de Biomembranas LBM-GBEyB-IMBICE-CONICET, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires, Argentina
| | - S Del V Alonso
- Laboratorio de Biomembranas LBM-GBEyB-IMBICE-CONICET, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires, Argentina.
| | - M J Prieto
- Laboratorio de Biomembranas LBM-GBEyB-IMBICE-CONICET, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Bernal, Buenos Aires, Argentina.
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19
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Abstract
Toxicological tests of a xenobiotic play a key role to determine the safety of the new compound before it reaches the market. In this review article, we describe the main types of toxicological studies that can be performed in vivo to detect a possible undesired effect of a xenobiotic with especial emphasis on the data available for the different types of nanoparticles. The different procedures described in this review allow to obtain valuable information about the possible toxic effects of a xenobiotic to minimize the possible risks for patients once the compound has been approved for therapeutic use.
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Affiliation(s)
- L. Romero-Castillo
- Unidad Asociada Neurodeath, School of Medicine, Universidad de Castilla-La Mancha, Albacete, Spain
- CIBERNED, Instituto de Salud Carlos III, Madrid, Spain
| | - I. Posadas
- Unidad Asociada Neurodeath, School of Medicine, Universidad de Castilla-La Mancha, Albacete, Spain
- Unidad Asociada Neurodeath, School of Pharmacy, Universidad de Castilla-La Mancha, Albacete, Spain
| | - V. Ceña
- Unidad Asociada Neurodeath, School of Medicine, Universidad de Castilla-La Mancha, Albacete, Spain
- CIBERNED, Instituto de Salud Carlos III, Madrid, Spain
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20
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Chakraborty C, Sharma AR, Sharma G, Lee SS. Zebrafish: A complete animal model to enumerate the nanoparticle toxicity. J Nanobiotechnology 2016; 14:65. [PMID: 27544212 PMCID: PMC4992559 DOI: 10.1186/s12951-016-0217-6] [Citation(s) in RCA: 178] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 08/05/2016] [Indexed: 01/18/2023] Open
Abstract
Presently, nanotechnology is a multi-trillion dollar business sector that covers a wide range of industries, such as medicine, electronics and chemistry. In the current era, the commercial transition of nanotechnology from research level to industrial level is stimulating the world’s total economic growth. However, commercialization of nanoparticles might offer possible risks once they are liberated in the environment. In recent years, the use of zebrafish (Danio rerio) as an established animal model system for nanoparticle toxicity assay is growing exponentially. In the current in-depth review, we discuss the recent research approaches employing adult zebrafish and their embryos for nanoparticle toxicity assessment. Different types of parameters are being discussed here which are used to evaluate nanoparticle toxicity such as hatching achievement rate, developmental malformation of organs, damage in gill and skin, abnormal behavior (movement impairment), immunotoxicity, genotoxicity or gene expression, neurotoxicity, endocrine system disruption, reproduction toxicity and finally mortality. Furthermore, we have also highlighted the toxic effect of different nanoparticles such as silver nanoparticle, gold nanoparticle, and metal oxide nanoparticles (TiO2, Al2O3, CuO, NiO and ZnO). At the end, future directions of zebrafish model and relevant assays to study nanoparticle toxicity have also been argued.
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Affiliation(s)
- Chiranjib Chakraborty
- Department of Bioinformatics, School of Computer and Information Sciences, Galgotias University, Greater Noida, Uttar Pradesh, India.
| | - Ashish Ranjan Sharma
- Institute of Skeletal Aging and Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Hallym University, Chuncheon, Gangwon-do, 24252, Republic of Korea
| | - Garima Sharma
- Institute of Skeletal Aging and Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Hallym University, Chuncheon, Gangwon-do, 24252, Republic of Korea
| | - Sang-Soo Lee
- Institute of Skeletal Aging and Orthopedic Surgery, Hallym University-Chuncheon Sacred Heart Hospital, Hallym University, Chuncheon, Gangwon-do, 24252, Republic of Korea.
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21
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Harper BJ, Clendaniel A, Sinche F, Way D, Hughes M, Schardt J, Simonsen J, Stefaniak AB, Harper SL. Impacts of chemical modification on the toxicity of diverse nanocellulose materials to developing zebrafish. CELLULOSE (LONDON, ENGLAND) 2016; 23:1763-1775. [PMID: 27468180 PMCID: PMC4959043 DOI: 10.1007/s10570-016-0947-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 04/16/2016] [Indexed: 05/21/2023]
Abstract
Cellulose is an abundant and renewable resource currently being investigated for utility in nanomaterial form for various promising applications ranging from medical and pharmaceutical uses to mechanical reinforcement and biofuels. The utility of nanocellulose and wide implementation ensures increasing exposure to humans and the environment as nanocellulose-based technologies advance. Here, we investigate how differences in aspect ratio and changes to surface chemistry, as well as synthesis methods, influence the biocompatibility of nanocellulose materials using the embryonic zebrafish. Investigations into the toxicity of neutral, cationic and anionic surface functionalities revealed that surface chemistry had a minimal influence on the overall toxicity of nanocellulose materials. Higher aspect ratio cellulose nanofibers produced by mechanical homogenization were, in some cases, more toxic than other cellulose-based nanofibers or nanocrystals produced by chemical synthesis methods. Using fluorescently labeled nanocellulose we were able to show that nanocellulose uptake did occur in embryonic zebrafish during development. We conclude that the benign nature of nanocellulose materials makes them an ideal platform to systematically investigate the inherent surface features driving nanomaterial toxicity in order to create safer design principles for engineered nanoparticles.
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Affiliation(s)
- Bryan J. Harper
- Department of Environmental and Molecular Toxicology, Oregon State University, 1007 ALS Building, Corvallis, OR 97331, USA
| | - Alicea Clendaniel
- Department of Environmental and Molecular Toxicology, Oregon State University, 1007 ALS Building, Corvallis, OR 97331, USA
| | - Federico Sinche
- Department of Environmental and Molecular Toxicology, Oregon State University, 1007 ALS Building, Corvallis, OR 97331, USA
| | - Daniel Way
- Department of Wood Science and Engineering, Oregon State University, Corvallis, OR, USA
| | - Michael Hughes
- Department of Wood Science and Engineering, Oregon State University, Corvallis, OR, USA
| | - Jenna Schardt
- Department of Wood Science and Engineering, Oregon State University, Corvallis, OR, USA
| | - John Simonsen
- Department of Wood Science and Engineering, Oregon State University, Corvallis, OR, USA
| | | | - Stacey L. Harper
- Department of Environmental and Molecular Toxicology, Oregon State University, 1007 ALS Building, Corvallis, OR 97331, USA
- School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, OR, USA
- Oregon Nanoscience and Microtechnologies Institute (ONAMI), Corvallis, OR, USA
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22
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Aptamer-Dendrimer Bioconjugates for Targeted Delivery of miR-34a Expressing Plasmid and Antitumor Effects in Non-Small Cell Lung Cancer Cells. PLoS One 2015; 10:e0139136. [PMID: 26406332 PMCID: PMC4583438 DOI: 10.1371/journal.pone.0139136] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 09/08/2015] [Indexed: 02/07/2023] Open
Abstract
Metastasis and drug resistance are major barriers for the treatment of non-small cell lung cancer (NSCLC). To explore new therapeutic options, we successfully encapsulated MicroRNA-34a (miR-34a), a potent endogenous tumor suppressor in NSCLC into S6 aptamer-conjugated dendrimer to form lung cancer-targeted gene delivery nanoparticles (PAM-Ap/pMiR-34a NPs). PAM-Ap/pMiR-34a NPs had a diameter of 100-200 nm and Zeta potential of ~30 mV at applied N/P ratio. The aptamer conjugation significantly improved cellular uptake as well as gene transfection efficiency of PAM-Ap/pMiR-34a NPs in cultured NSCLC cells. We showed that PAM-Ap/pMiR-34a NPs enhanced the regulation of targeted genes, BCL-2 and p53 in vitro. In addition, we revealed PAM-Ap/pMiR-34a NPs significantly inhibited cell growth, migration, invasion and induced apoptosis of lung cancer cells compared with non-targeted NPs. The method provided a novel therapeutic strategy for the experimental treatment of NSCLC.
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23
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Harper B, Thomas D, Chikkagoudar S, Baker N, Tang K, Heredia-Langner A, Lins R, Harper S. Comparative hazard analysis and toxicological modeling of diverse nanomaterials using the embryonic zebrafish (EZ) metric of toxicity. JOURNAL OF NANOPARTICLE RESEARCH : AN INTERDISCIPLINARY FORUM FOR NANOSCALE SCIENCE AND TECHNOLOGY 2015; 17:250. [PMID: 26069453 PMCID: PMC4454819 DOI: 10.1007/s11051-015-3051-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 05/26/2015] [Indexed: 05/24/2023]
Abstract
The integration of rapid assays, large datasets, informatics, and modeling can overcome current barriers in understanding nanomaterial structure-toxicity relationships by providing a weight-of-the-evidence mechanism to generate hazard rankings for nanomaterials. Here, we present the use of a rapid, low-cost assay to perform screening-level toxicity evaluations of nanomaterials in vivo. Calculated EZ Metric scores, a combined measure of morbidity and mortality in developing embryonic zebrafish, were established at realistic exposure levels and used to develop a hazard ranking of diverse nanomaterial toxicity. Hazard ranking and clustering analysis of 68 diverse nanomaterials revealed distinct patterns of toxicity related to both the core composition and outermost surface chemistry of nanomaterials. The resulting clusters guided the development of a surface chemistry-based model of gold nanoparticle toxicity. Our findings suggest that risk assessments based on the size and core composition of nanomaterials alone may be wholly inappropriate, especially when considering complex engineered nanomaterials. Research should continue to focus on methodologies for determining nanomaterial hazard based on multiple sub-lethal responses following realistic, low-dose exposures, thus increasing the availability of quantitative measures of nanomaterial hazard to support the development of nanoparticle structure-activity relationships.
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Affiliation(s)
- Bryan Harper
- />Oregon State University, 1007 ALS Building, Corvallis, OR 97331 USA
| | - Dennis Thomas
- />Pacific Northwest National Laboratory, Richland, WA USA
| | | | - Nathan Baker
- />Pacific Northwest National Laboratory, Richland, WA USA
| | - Kaizhi Tang
- />Intelligent Automation, Inc., Rockville, MD USA
| | | | - Roberto Lins
- />CPqAM, Oswaldo Cruz Foundation, FIOCRUZ-PE, Recife, PE 50.740-465 Brazil
| | - Stacey Harper
- />Oregon State University, 1007 ALS Building, Corvallis, OR 97331 USA
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24
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The janus facet of nanomaterials. BIOMED RESEARCH INTERNATIONAL 2015; 2015:317184. [PMID: 26075225 PMCID: PMC4449866 DOI: 10.1155/2015/317184] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 12/06/2014] [Indexed: 12/12/2022]
Abstract
Application of nanoscale materials (NMs) displays a rapidly increasing trend in electronics, optics, chemical catalysis, biotechnology, and medicine due to versatile nature of NMs and easily adjustable physical, physicochemical, and chemical properties. However, the increasing abundance of NMs also poses significant new and emerging health and environmental risks. Despite growing efforts, understanding toxicity of NMs does not seem to cope with the demand, because NMs usually act entirely different from those of conventional small molecule drugs. Currently, large-scale application of available safety assessment protocols, as well as their furthering through case-by-case practice, is advisable. We define a standard work-scheme for nanotoxicity evaluation of NMs, comprising thorough characterization of structural, physical, physicochemical, and chemical traits, followed by measuring biodistribution in live tissue and blood combined with investigation of organ-specific effects especially regarding the function of the brain and the liver. We propose a range of biochemical, cellular, and immunological processes to be explored in order to provide information on the early effects of NMs on some basic physiological functions and chemical defense mechanisms. Together, these contributions give an overview with important implications for the understanding of many aspects of nanotoxicity.
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Sun Y, Guo F, Zou Z, Li C, Hong X, Zhao Y, Wang C, Wang H, Liu H, Yang P, Han Z, Liu K, Kuba K, Song B, Gao J, Mo Z, Li D, Li B, Li Q, Zhong N, Wang C, Penninger JM, Jiang C. Cationic nanoparticles directly bind angiotensin-converting enzyme 2 and induce acute lung injury in mice. Part Fibre Toxicol 2015; 12:4. [PMID: 25890286 PMCID: PMC4395934 DOI: 10.1186/s12989-015-0080-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Accepted: 01/27/2015] [Indexed: 02/05/2023] Open
Abstract
Background Nanoparticles have become a key technology in multiple industries. However, there are growing reports of the toxicity of nanomaterials to humans. In particular, nanomaterials have been linked to lung diseases. The molecular mechanisms of nanoparticle toxicity are largely unexplored. Methods Acute lung injury was induced in wild-type mice and angiotensin-coverting enzyme 2 (ACE2) knockout mice by the intratracheal instillation of cationic polyamidoamine dendrimer (PAMAM) nanoparticles. For rescue experiments, losartan (15 mg/kg in PBS) was injected intraperitoneally 30 min before nanoparticle administration. Results Some PAMAM nanoparticles, but not anionic PAMAM nanoparticles or carbon nanotubes, triggered acute lung failure in mice. Mechanistically, cationic nanoparticles can directly bind ACE2, decrease its activity and down-regulate its expression level in lung tissue, resulting in deregulation of the renin-angiotensin system. Gene inactivation of Ace2 can exacerbate lung injury. Importantly, the administration of losartan, which is an angiotensin II type I receptor antagonist, can ameliorate PAMAM nanoparticle-induced lung injury. Conclusions Our data provide molecular insight into PAMAM nanoparticle-induced lung injury and suggest potential therapeutic and screening strategies to address the safety of nanomaterials. Electronic supplementary material The online version of this article (doi:10.1186/s12989-015-0080-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yang Sun
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Tsinghua University, Beijing, 100005, China.
| | - Feng Guo
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Tsinghua University, Beijing, 100005, China.
| | - Zhen Zou
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Tsinghua University, Beijing, 100005, China.
| | - Chenggang Li
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Tsinghua University, Beijing, 100005, China.
| | - Xiaoxu Hong
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Tsinghua University, Beijing, 100005, China. .,Institute of Medical Biology, Chinese Academy of Medical Sciences, No. 379, Jiaoling Road, Kunming, Yunnan, 650118, China. .,Chinese Pharmacopeia Commission, No. 11 Building Fahuananli Chongwen District, Beijing, 100060, China.
| | - Yan Zhao
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Tsinghua University, Beijing, 100005, China.
| | - Chenxuan Wang
- National Center for Nanoscience and Technology, Beijing, 100190, China.
| | - Hongliang Wang
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Tsinghua University, Beijing, 100005, China.
| | - Haolin Liu
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Tsinghua University, Beijing, 100005, China.
| | - Peng Yang
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Tsinghua University, Beijing, 100005, China.
| | - Zongsheng Han
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Tsinghua University, Beijing, 100005, China.
| | - Kangtai Liu
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Tsinghua University, Beijing, 100005, China.
| | - Keiji Kuba
- IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Dr. Bohrgasse3, A-1030, Vienna, Austria.
| | - Bin Song
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Tsinghua University, Beijing, 100005, China.
| | - Jinming Gao
- Center for Translational Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing, 100730, PR China.
| | - Ziyao Mo
- State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, 151 Yanjiang Rd, Guangzhou, Guangdong, 510120, China.
| | - Dangsheng Li
- Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, 200031, China.
| | - Bo Li
- National Center for Safety Evaluation of Drugs, National Institutes for Food and Drug Control, Hongda Middle Street A8, Beijing Economic and Technological Development Area, Beijing, 100176, China.
| | - Qihan Li
- Institute of Medical Biology, Chinese Academy of Medical Sciences, No. 379, Jiaoling Road, Kunming, Yunnan, 650118, China.
| | - Nanshan Zhong
- State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, 151 Yanjiang Rd, Guangzhou, Guangdong, 510120, China.
| | - Chen Wang
- National Center for Nanoscience and Technology, Beijing, 100190, China.
| | - Josef M Penninger
- IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Dr. Bohrgasse3, A-1030, Vienna, Austria.
| | - Chengyu Jiang
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Tsinghua University, Beijing, 100005, China. .,Center for Translational Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing, 100730, PR China. .,State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, 610000, China.
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Winnicka K, Wroblewska M, Sosnowska K, Car H, Kasacka I. Evaluation of cationic polyamidoamine dendrimers' dermal toxicity in the rat skin model. DRUG DESIGN DEVELOPMENT AND THERAPY 2015; 9:1367-77. [PMID: 25834395 PMCID: PMC4357618 DOI: 10.2147/dddt.s78336] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Polyamidoamine (PAMAM) dendrimers are multi-branched, three-dimensional polymers with unique architecture, which makes these molecules attractive for medical and pharmaceutical applications. Using PAMAM as drug carriers for topical delivery might be beneficial as they only produce a transient effect without skin irritation. To evaluate the dermal toxicity of cationic PAMAM dendrimers generation 2 and generation 3, skin irritation studies were performed in vivo in the rat skin model. After 10 days topical application of various concentrations of PAMAM-NH2 (0.3 mg/mL, 3 mg/mL, 6 mg/mL, 30 mg/mL, 300 mg/mL), skin irritation was evaluated by visual, histopathological, and immunohistochemical examination. Microscopic assessment after hematoxylin-eosin staining revealed significant morphological changes of epidermal cells after application of PAMAM-NH2 at a concentration of ≥6 mg/mL. Morphological alterations of epidermal cells included cytoplasmic vacuolization of keratinocytes in the basal and spinous layers. Cytomorphological changes in keratinocytes, overall picture of the epidermis, and histopathological changes in the dermis were dose dependent. Detected alterations concerned hyperplasia of connective tissue fibers and leukocyte infiltration. Visible granulocyte infiltration in the upper dermis and sockets formed by necrotic, cornified cells in the hyperplastic foci of epithelium were also noted. Immunohistochemical analyses revealed that increased nuclear immunoreactivity to PCNA correlated with the concentration of PAMAM-NH2, but no significant differences in the cell proliferation activity in skin treated with PAMAM-NH2 generation 2 or generation 3 were observed. Significantly higher expression of PCNA extended throughout the skin layers might suggest abnormal cell proliferation, which, as a consequence, might even lead to neoplastic changes.
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Affiliation(s)
- Katarzyna Winnicka
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Medical University of Białystok, Białystok, Poland
| | - Magdalena Wroblewska
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Medical University of Białystok, Białystok, Poland
| | - Katarzyna Sosnowska
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Medical University of Białystok, Białystok, Poland
| | - Halina Car
- Department of Experimental Pharmacology, Faculty of Health Sciences, Medical University of Białystok, Białystok, Poland
| | - Irena Kasacka
- Department of Histology and Cytophysiology, Faculty of Pharmacy, Medical University of Białystok, Białystok, Poland
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Bonventre JA, Pryor JB, Harper BJ, Harper SL. The impact of aminated surface ligands and silica shells on the stability, uptake, and toxicity of engineered silver nanoparticles. JOURNAL OF NANOPARTICLE RESEARCH : AN INTERDISCIPLINARY FORUM FOR NANOSCALE SCIENCE AND TECHNOLOGY 2014; 16:2761. [PMID: 25484618 PMCID: PMC4255064 DOI: 10.1007/s11051-014-2761-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 11/14/2014] [Indexed: 05/21/2023]
Abstract
Inherent nanomaterial characteristics, composition, surface chemistry, and primary particle size, are known to impact particle stability, uptake, and toxicity. Nanocomposites challenge our ability to predict nanoparticle reactivity in biological systems if they are composed of materials with contrasting relative toxicities. We hypothesized that toxicity would be dominated by the nanoparticle surface (shell vs core), and that modulating the surface ligands would have a direct impact on uptake. We exposed developing zebrafish (Danio rerio) to a series of ~70 nm amine-terminated silver nanoparticles with silica shells (AgSi NPs) to investigate the relative influence of surface amination, composition, and size on toxicity. Like-sized aminated AgSi and Si NPs were more toxic than paired hydroxyl-terminated nanoparticles; however, both AgSi NPs were more toxic than the Si NPs, indicating a significant contribution of the silver core to the toxicity. Incremental increases in surface amination did not linearly increase uptake and toxicity, but did have a marked impact on dispersion stability. Mass-based exposure metrics initially supported the hypothesis that smaller nanoparticles (20 nm) would be more toxic than larger particles (70 nm). However, surface area-based metrics revealed that toxicity was independent of size. Our studies suggest that nanoparticle surfaces play a critical role in the uptake and toxicity of AgSi NPs, while the impact of size may be a function of the exposure metric used. Overall, uptake and toxicity can be dramatically altered by small changes in surface functionalization or exposure media. Only after understanding the magnitude of these changes, can we begin to understand the biologically available dose following nanoparticle exposure.
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Affiliation(s)
- Josephine A. Bonventre
- Department of Environmental & Molecular Toxicology, Oregon State University, Corvallis, OR USA
| | - Joseph B. Pryor
- Department of Environmental & Molecular Toxicology, Oregon State University, Corvallis, OR USA
| | - Bryan J. Harper
- Department of Environmental & Molecular Toxicology, Oregon State University, Corvallis, OR USA
| | - Stacey L. Harper
- Department of Environmental & Molecular Toxicology, Oregon State University, Corvallis, OR USA
- Department of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, OR USA
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