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Gross BP, Chitphet K, Wongrakpanich A, Wafa EI, Norian LA, Salem AK. Biotinylated Streptavidin Surface Coating Improves the Efficacy of a PLGA Microparticle-Based Cancer Vaccine. Bioconjug Chem 2020; 31:2147-2157. [DOI: 10.1021/acs.bioconjchem.0c00347] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Brett P. Gross
- Interdisciplinary Graduate Program in Immunology, University of Iowa, Iowa City, Iowa 52242, United States
| | - Khanidtha Chitphet
- Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, University of Iowa, Iowa City, Iowa 52242, United States
| | - Amaraporn Wongrakpanich
- Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, University of Iowa, Iowa City, Iowa 52242, United States
- Department of Pharmacy and Center of Excellence in Innovation Drug Delivery and Nanomedicine, Mahidol University, Rakatjavee, Bangkok 10400, Thailand
| | - Emad I. Wafa
- Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, University of Iowa, Iowa City, Iowa 52242, United States
| | - Lyse A. Norian
- Department of Nutrition Sciences and University of Alabama at Birmingham O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, Alabama 35233, United States
| | - Aliasger K. Salem
- Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, University of Iowa, Iowa City, Iowa 52242, United States
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2
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Hassanzadeh P, Atyabi F, Dinarvand R. Tissue engineering: Still facing a long way ahead. J Control Release 2018; 279:181-197. [DOI: 10.1016/j.jconrel.2018.04.024] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 04/09/2018] [Accepted: 04/11/2018] [Indexed: 02/07/2023]
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3
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Zhou T, Cai W, Yang H, Zhang H, Hao M, Yuan L, Liu J, Zhang L, Yang Y, Liu X, Deng J, Zhao P, Yang G, Duan Y. Annexin V conjugated nanobubbles: A novel ultrasound contrast agent for in vivo assessment of the apoptotic response in cancer therapy. J Control Release 2018. [PMID: 29522835 DOI: 10.1016/j.jconrel.2018.03.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In vivo assessment of apoptotic response to cancer therapy is believed to be very important for optimizing management of treatment. However, few noninvasive strategies are currently available to monitor the therapeutic response in vivo. Ultrasonography has been used to detect apoptotic cell death in vivo, but a high-frequency transducer is needed. Fortunately, the capability of ultrasound contrast agents (UCAs) to exit the leaky vasculature of tumors enables ultrasound-targeted imaging of molecular events in response to cancer therapy. In this study, we prepared a novel nano-sized UCA, namely, Annexin V-conjugated nanobubbles (AV-NBs, 635.5 ± 25.4 nm). In vitro studies revealed that AV-NBs were relatively stable and highly echogenic. Moreover, these AV-NBs could easily extravasate into the tumor vasculature and recognize the apoptotic cells with high specificity and affinity in tumors sensitive to chemotherapy. Ultrasound imaging results demonstrated that AV-NBs had higher echogenicity and significantly greater enhancement compared with the untargeted control NBs (P < 0.01) inside the tumors after chemotherapy. Taken together, this study provides a promising method to accurately evaluate therapeutic effects at the molecular level to support cancer management.
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Affiliation(s)
- Tian Zhou
- Department of Ultrasound Diagnosis, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China; Department of Ultrasound Diagnosis, General Hospital of the PLA Rocket Force, Beijing 100088, China
| | - Wenbin Cai
- Department of Ultrasound Diagnosis, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China
| | - Hengli Yang
- Department of Ultrasound Diagnosis, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China
| | - Huizhong Zhang
- Department of Medical Laboratory and Research Center, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China
| | - Minghua Hao
- Department of Neurology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China
| | - Lijun Yuan
- Department of Ultrasound Diagnosis, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China
| | - Jie Liu
- Department of Ultrasound Diagnosis, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China
| | - Li Zhang
- Department of Ultrasound Diagnosis, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China
| | - Yilin Yang
- Department of Ultrasound Diagnosis, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China
| | - Xi Liu
- Department of Ultrasound Diagnosis, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China
| | - Jianling Deng
- Department of Ultrasound Diagnosis, General Hospital of the PLA Rocket Force, Beijing 100088, China
| | - Ping Zhao
- Department of Ultrasound Diagnosis, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China.
| | - Guodong Yang
- Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an 710032, China.
| | - Yunyou Duan
- Department of Ultrasound Diagnosis, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China.
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Characterization of In Vivo Selected Bacteriophage for the Development of Novel Tumor-Targeting Agents with Specific Pharmacokinetics and Imaging Applications. Methods Mol Biol 2018. [PMID: 28299705 DOI: 10.1007/978-1-4939-6911-1_29] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Bacteriophage (phage) display technology is a powerful strategy for the identification of peptide-based tumor targeting agents for drug discovery. Phage selections performed in vitro often result in many phage clones/peptides with similar properties and often similar sequence. However, these phage and corresponding peptides are selected, validated, and characterized outside the complicated milieu of a living animal. Thus, there is no guarantee that peptides from in vitro selections will successfully meet the requirements of an in vivo targeting compound. In comparison, in vivo phage display selections have the distinct advantage of identifying phage clones with robust pharmacokinetics and tumor/tissue targeting ability. This capacity has allowed for the identification of peptides with specific in vivo localization and/or clearance profiles. However, in vivo phage display selections also have the potential to result in an array of phage clones with various and unknown targets and little to no sequence similarity. Given these shortcomings, we have developed methods to select phage peptide display libraries in living mice to identify phage (and corresponding synthesized peptides) with specific clearance and/or tumor-targeting propensity. Additionally, we describe the use of labeled phage clones for the efficient screening of selected phage/peptides to aid in the identification and characterization of a phage clone with an optimal and specific pharmacokinetic profile.
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5
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Häuser M, Langer K, Schönhoff M. pH-Triggered release from surface-modified poly(lactic-co-glycolic acid) nanoparticles. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2015; 6:2504-2512. [PMID: 26885463 PMCID: PMC4734421 DOI: 10.3762/bjnano.6.260] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 12/11/2015] [Indexed: 06/05/2023]
Abstract
Nanoparticles (NP) of poly(lactic-co-glycolic acid) (PLGA) represent a promising biodegradable drug delivery system. We suggest here a two-step release system of PLGA nanoparticles with a pH-tunable polymeric shell, providing an initial pH-triggered step, releasing a membrane-toxic cationic compound. PLGA nanoparticles are coated by polyelectrolytes using the layer-by-layer self-assembly technique, employing poly(acrylic acid) (PAA) as a pH-sensitive component and poly(diallyldimethylammonium chloride) (PDADMAC) as the releasable polycation. The pH during multilayer deposition plays a major role and influences the titration curve of the layer system. The pH-tunability of PAA is intensively investigated with regard to the pH region, in which the particle system becomes uncharged. The isoelectric point can be shifted by employing suitable deposition pH values. The release is investigated by quantitative (1)H NMR, yielding a pH-dependent release curve. A release of PDADMAC is initiated by a decrease of the pH value. The released amount of polymer, as quantified by (1)H NMR analysis, clearly depends on the pH value and thus on the state of deprotonation of the pH-sensitive PAA layer. Subsequent incubation of the nanoparticles with high concentrations of sodium chloride shows no further release and thus demonstrates the pH-driven release to be quantitative.
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Affiliation(s)
- Manuel Häuser
- Institute of Physical Chemistry, University of Muenster, Corrensstraße 28/30, 48149 Münster, Germany
- Institute of Pharmaceutical Technology and Biopharmacy, University of Muenster, Corrensstraße 48, 48149 Münster, Germany
| | - Klaus Langer
- Institute of Pharmaceutical Technology and Biopharmacy, University of Muenster, Corrensstraße 48, 48149 Münster, Germany
| | - Monika Schönhoff
- Institute of Physical Chemistry, University of Muenster, Corrensstraße 28/30, 48149 Münster, Germany
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6
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Yewle J, Wattamwar P, Tao Z, Ostertag EM, Ghoroghchian PP. Progressive Saturation Improves the Encapsulation of Functional Proteins in Nanoscale Polymer Vesicles. Pharm Res 2015; 33:573-89. [PMID: 26508477 DOI: 10.1007/s11095-015-1809-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 10/09/2015] [Indexed: 10/22/2022]
Abstract
PURPOSE To develop a technique that maximizes the encapsulation of functional proteins within neutrally charged, fully PEGylated and nanoscale polymer vesicles (i.e., polymersomes). METHODS Three conventional vesicle formation methods were utilized for encapsulation of myoglobin (Mb) in polymersomes of varying size, PEG length, and membrane thickness. Mb concentrations were monitored by UV-Vis spectroscopy, inductively coupled plasma optical emission spectroscopy (ICP-OES) and by the bicinchoninic acid (BCA) assay. Suspensions were subject to protease treatment to differentiate the amounts of surface-associated vs. encapsulated Mb. Polymersome sizes and morphologies were monitored by dynamic light scattering (DLS) and by cryogenic transmission electron microscopy (cryo-TEM), respectively. Binding and release of oxygen were measured using a Hemeox analyzer. RESULTS Using the established "thin-film rehydration" and "direct hydration" methods, Mb was found to be largely surface-associated with negligible aqueous encapsulation within polymersome suspensions. Through iterative optimization, a novel "progressive saturation" technique was developed that greatly increased the final concentrations of Mb (from < 0.5 to > 2.0 mg/mL in solution), the final weight ratio of Mb-to-polymer that could be reproducibly obtained (from < 1 to > 4 w/w% Mb/polymer), as well as the overall efficiency of Mb encapsulation (from < 5 to > 90%). Stable vesicle morphologies were verified by cryo-TEM; the suspensions also displayed no signs of aggregate formation for > 2 weeks as assessed by DLS. "Progressive saturation" was further utilized for the encapsulation of a variety of other proteins, ranging in size from 17 to 450 kDa. CONCLUSIONS Compared to established vesicle formation methods, "progressive saturation" increases the quantities of functional proteins that may be encapsulated in nanoscale polymersomes.
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Affiliation(s)
- Jivan Yewle
- Vindico Pharmaceuticals, Inc., A169 ASTeCC Bldg., Lexington, Kentucky, 40506, USA
| | - Paritosh Wattamwar
- Vindico Pharmaceuticals, Inc., A169 ASTeCC Bldg., Lexington, Kentucky, 40506, USA
| | - Zhimin Tao
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Building 76-261F, Cambridge, Massachusetts, 02139, USA
| | - Eric M Ostertag
- Vindico Pharmaceuticals, Inc., A169 ASTeCC Bldg., Lexington, Kentucky, 40506, USA
| | - P Peter Ghoroghchian
- Vindico Pharmaceuticals, Inc., A169 ASTeCC Bldg., Lexington, Kentucky, 40506, USA. .,Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Building 76-261F, Cambridge, Massachusetts, 02139, USA. .,Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, Massachusetts, 02115, USA.
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7
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Shi C, Ahmad Khan S, Wang K, Schneider M. Improved delivery of the natural anticancer drug tetrandrine. Int J Pharm 2015; 479:41-51. [DOI: 10.1016/j.ijpharm.2014.12.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 12/10/2014] [Accepted: 12/11/2014] [Indexed: 12/18/2022]
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8
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Dandekar P, Jain R, Keil M, Loretz B, Koch M, Wenz G, Lehr CM. Enhanced uptake and siRNA-mediated knockdown of a biologically relevant gene using cyclodextrin polyrotaxane. J Mater Chem B 2015; 3:2590-2598. [DOI: 10.1039/c4tb01821d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cellular investigations confirm the ability of cyclodextrin polyrotaxane nanoplexes to deliver siRNA for down-regulating genes relevant to the pathogenesis of tuberculosis.
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Affiliation(s)
- P. Dandekar
- Department of Drug Delivery (DDEL)
- Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS)
- Campus A4 1
- Saarland University
- Saarbrücken
| | - R. Jain
- Department of Drug Delivery (DDEL)
- Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS)
- Campus A4 1
- Saarland University
- Saarbrücken
| | - M. Keil
- Organic Macromolecular Chemistry
- Campus C4 2
- Saarland University
- Saarbrücken
- Germany
| | - B. Loretz
- Department of Drug Delivery (DDEL)
- Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS)
- Campus A4 1
- Saarland University
- Saarbrücken
| | - M. Koch
- Innovative Electron Microscopy
- INM-Leibniz Institute for New Materials
- Campus D2 2
- Saarland University
- Saarbrücken
| | - G. Wenz
- Organic Macromolecular Chemistry
- Campus C4 2
- Saarland University
- Saarbrücken
- Germany
| | - C.-M. Lehr
- Department of Drug Delivery (DDEL)
- Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS)
- Campus A4 1
- Saarland University
- Saarbrücken
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9
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Belletti D, Vandelli MA, Tonelli M, Zapparoli M, Forni F, Tosi G, Ruozi B. Functionalization of liposomes: microscopical methods for preformulative screening. J Liposome Res 2014; 25:150-6. [DOI: 10.3109/08982104.2014.956221] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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10
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Hira SK, Mishra AK, Ray B, Manna PP. Targeted delivery of doxorubicin-loaded poly (ε-caprolactone)-b-poly (N-vinylpyrrolidone) micelles enhances antitumor effect in lymphoma. PLoS One 2014; 9:e94309. [PMID: 24714166 PMCID: PMC3979807 DOI: 10.1371/journal.pone.0094309] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Accepted: 03/15/2014] [Indexed: 02/05/2023] Open
Abstract
Background The present study was motivated by the need to design a safe nano-carrier for the delivery of doxorubicin which could be tolerant to normal cells. PCL63-b-PNVP90 was loaded with doxorubicin (6 mg/ml), and with 49.8% drug loading efficiency; it offers a unique platform providing selective immune responses against lymphoma. Methods In this study, we have used micelles of amphiphilic PCL63-b-PNVP90 block copolymer as nano-carrier for controlled release of doxorubicin (DOX). DOX is physically entrapped and stabilized in the hydrophobic cores of the micelles and biological roles of these micelles were evaluated in lymphoma. Results DOX loaded PCL63-b-PNVP90 block copolymer micelles (DOX-PCL63-b-PNVP90) shows enhanced growth inhibition and cytotoxicity against human (K-562, JE6.1 and Raji) and mice lymphoma cells (Dalton's lymphoma, DL). DOX-PCL63-b-PNVP90 demonstrates higher levels of tumoricidal effect against DOX-resistant tumor cells compared to free DOX. DOX-PCL63-b-PNVP90 demonstrated effective drug loading and a pH-responsive drug release character besides exhibiting sustained drug release performance in in-vitro and intracellular drug release experiments. Conclusion Unlike free DOX, DOX-PCL63-b-PNVP90 does not show cytotoxicity against normal cells. DOX-PCL63-b-PNVP90 prolonged the survival of tumor (DL) bearing mice by enhancing the apoptosis of the tumor cells in targeted organs like liver and spleen.
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Affiliation(s)
- Sumit Kumar Hira
- Immunobiology Laboratory, Department of Zoology, Faculty of Science, Banaras Hindu University, Varanasi, India
| | - Avnish Kumar Mishra
- Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi, India
| | - Biswajit Ray
- Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi, India
- * E-mail: (BR); (PPM)
| | - Partha Pratim Manna
- Immunobiology Laboratory, Department of Zoology, Faculty of Science, Banaras Hindu University, Varanasi, India
- * E-mail: (BR); (PPM)
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11
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Romero G, Echeverría M, Qiu Y, Murray RA, Moya SE. A novel approach to monitor intracellular degradation kinetics of poly(lactide-co-glycolide) nanoparticles by means of flow cytometry. J Mater Chem B 2013; 2:826-833. [PMID: 32261314 DOI: 10.1039/c3tb21330g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The intracellular degradation of poly(lactide-co-glycolide) (PLGA) nanoparticles (NPs) is studied by means of flow cytometry (FACS). NPs are prepared with PLGA of two different ratios of the d,l-lactide and glycolide blocks: 85 : 15 and 65 : 35. PLGA molecules are labelled with rhodamine B. Flow cytometry is first used to follow the degradation of PLGA NPs in PBS over time by measuring the decrease in fluorescence per particle. The 85 : 15 PLGA NPs progressively degrade during the first 10 days and remain constant thereafter. The 65 : 35 PLGA NPs remain unaltered, showing no changes in fluorescence intensity. FACS data are confirmed by transmission electron microscopy and dynamic light scattering measurements. Intracellular degradation of 85 : 15 PLGA is measured by the increase in fluorescence intensity in the cell population with time due to the liberation of rhodamine B labelled PLGA molecules from NPs in the cell interior where rhodamine displays an increased quantum yield. The fluorescence intensity from 85 : 15 PLGA NPs increases up to 24 hours, remaining constant thereafter. No change in the fluorescence of 65 : 35 PLGA NPs is observed after 4 days. The intracellular behaviour of the PLGA NPs is also confirmed by confocal Raman microscopy.
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Affiliation(s)
- Gabriela Romero
- CIC biomaGUNE, Paseo Miramón 182 C, 20009, San Sebastián, Spain.
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12
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Manikas AC, Causa F, Della Moglie R, Netti PA. Tuning gold nanoparticles interfaces by specific peptide interaction for surface enhanced Raman spectroscopy (SERS) and separation applications. ACS APPLIED MATERIALS & INTERFACES 2013; 5:7915-22. [PMID: 23862632 DOI: 10.1021/am401998m] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Surface functionalization and control over nanostructured interfaces represents a key aspect in nanoscience and nanobiotechnology. Nanoplasmonic structures for analyte detection typically require sophisticated nanofabrication techniques, as well as bioactivated nanostructures that need multistep conjugations for chemical ligation. An alternative to such complex processes is to rely on specific biomolecules adsorption for decoration or self-assembly of nanoparticles at solid/liquid interface. In principle, small biomolecules with specific binding properties to nanostructures could control the assembly without modifying the nanoparticle chemistry, pH of the solution or salt concentration. Importantly, such an approach could be direct, robust, and reversible. In this work, we report about the use of a specific peptide for direct and reversible adsorption on gold nanoparticles with tuned interfacial properties just by simply adjusting the ratio between the numbers of peptide molecules to the number of gold nanoparticles. This easy, direct and reversible assembly of gold nanoparticles mediated by the specific peptide makes this platform ideal for small-volume samples and low concentrations detection using surface enhanced Raman Spectroscopy, as well as for the capture or separation of biomolecules in complex mix.
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Affiliation(s)
- Anastasios C Manikas
- Center for Advanced Biomaterials for Healthcare@CRIB, Istituto Italiano di Tecnologia (IIT), Largo Barsanti e Matteucci 53, 80125 Naples, Italy
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Romero G, Murray RA, Qiu Y, Sanz D, Moya SE. Layer by layer surface engineering of poly (lactide-co-glycolide) nanoparticles: A versatile tool for nanoparticle engineering for targeted drug delivery. Sci China Chem 2013. [DOI: 10.1007/s11426-013-4891-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Sah H, Thoma LA, Desu HR, Sah E, Wood GC. Concepts and practices used to develop functional PLGA-based nanoparticulate systems. Int J Nanomedicine 2013; 8:747-65. [PMID: 23459088 PMCID: PMC3582541 DOI: 10.2147/ijn.s40579] [Citation(s) in RCA: 139] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The functionality of bare polylactide-co-glycolide (PLGA) nanoparticles is limited to drug depot or drug solubilization in their hard cores. They have inherent weaknesses as a drug-delivery system. For instance, when administered intravenously, the nanoparticles undergo rapid clearance from systemic circulation before reaching the site of action. Furthermore, plain PLGA nanoparticles cannot distinguish between different cell types. Recent research shows that surface functionalization of nanoparticles and development of new nanoparticulate dosage forms help overcome these delivery challenges and improve in vivo performance. Immense research efforts have propelled the development of diverse functional PLGA-based nanoparticulate delivery systems. Representative examples include PEGylated micelles/nanoparticles (PEG, polyethylene glycol), polyplexes, polymersomes, core-shell-type lipid-PLGA hybrids, cell-PLGA hybrids, receptor-specific ligand-PLGA conjugates, and theranostics. Each PLGA-based nanoparticulate dosage form has specific features that distinguish it from other nanoparticulate systems. This review focuses on fundamental concepts and practices that are used in the development of various functional nanoparticulate dosage forms. We describe how the attributes of these functional nanoparticulate forms might contribute to achievement of desired therapeutic effects that are not attainable using conventional therapies. Functional PLGA-based nanoparticulate systems are expected to deliver chemotherapeutic, diagnostic, and imaging agents in a highly selective and effective manner.
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Affiliation(s)
- Hongkee Sah
- College of Pharmacy, Ewha Womans University, Sedaemun-gu, Seoul, South Korea.
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Donaldson O, Huang ZJ, Comolli N. An integrated experimental and modeling approach to propose biotinylated PLGA microparticles as versatile targeting vehicles for drug delivery. Prog Biomater 2013; 2:3. [PMID: 29470678 PMCID: PMC5151110 DOI: 10.1186/2194-0517-2-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Accepted: 01/06/2013] [Indexed: 11/21/2022] Open
Abstract
Polymeric microparticles with covalently attached biotin are proposed as versatile targeting vehicles for drug delivery. The proposed microparticles made of 85/15 poly (lactic-co-glycolic acid) (PLGA) will have biotin available on the outside of the particle for the further attachment with an avidin group. Taking advantage of biotin's high affinity for avidin, and avidin's well-known chemistry, the particle has the potential to be easily coated with a variety of targeting moieties. This paper focuses on the design and resulting effect of adding biotin to PLGA microparticles using an integrated experimental and modeling approach. A fluorescent-tagged avidin (488-streptavidin) was used to confirm the presence and bioavailability of biotin on the outside of the particles. For the purpose of this study, bovine serum albumin (BSA) was used as a model therapeutic drug. Microparticles were created using two different types of polyvinyl alcohol 88 and 98 mol% hydrolyzed, which were then analyzed for their size, morphology, and encapsulation capacity of BSA. Release studies performed in vitro confirmed the slow release of the BSA over a 28-day period. Based on these release profiles, a release kinetics model was used to further quantify the effect of biotinylation of PLGA microparticles on their release characteristics by quantitatively extracting the effective drug diffusivity and drug desorption rate from the release profiles. It was found that the biotinylation of the PLGA microparticles slowed down both the drug desorption and drug diffusion process, which confirmed that biotinylated PLGA microparticles can be used for controlled drug release. The presented technology, as well as the proposed integrated experimental and modeling approach, forms a solid foundation for future studies using a cell-specific ligand that can be attached to avidin and incorporated onto the microparticles for targeted delivery.
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Affiliation(s)
- Olivia Donaldson
- Villanova University, 800 East Lancaster Avenue, Villanova, PA 19085 USA
| | - Zuyi Jacky Huang
- Villanova University, 800 East Lancaster Avenue, Villanova, PA 19085 USA
| | - Noelle Comolli
- Villanova University, 800 East Lancaster Avenue, Villanova, PA 19085 USA
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16
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Romero G, Qiu Y, Murray RA, Moya SE. Study of intracellular delivery of doxorubicin from poly(lactide-co-glycolide) nanoparticles by means of fluorescence lifetime imaging and confocal Raman microscopy. Macromol Biosci 2013; 13:234-41. [PMID: 23316003 DOI: 10.1002/mabi.201200235] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Revised: 09/21/2012] [Indexed: 11/09/2022]
Abstract
The intracellular delivery of Doxorubicin (Dox) from poly(lactide-co-glycolide) (PLGA) nanoparticles stabilised with bovine serum albumin, in HepG2 cells, is studied via flow cytometry, fluorescence lifetime imaging microscopy (FLIM), confocal Raman microscopy (CRM) and cell viability studies. Flow cytometry shows that the initial uptake of PLGA and Dox follow the same kinetics. However, following 8 h of incubation, the fluorescence intensity and cellular uptake of Dox decreases, while in the case of PLGA both parameters remain constant. FLIM shows the presence of a single-lifetime species, with a lifetime of 1.15 ns when measured inside the cells. Cell viability decreases by approximately 20% when incubated for 24 h with PLGA loaded with Dox, with a particle concentration of 100 µg · mL(-1). At the single-cell level, CRM shows changes in the bands from DNA and proteins in the cell nucleus when incubated with PLGA loaded with Dox.
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Vanpouille-Box C, Hindré F. Nanovectorized radiotherapy: a new strategy to induce anti-tumor immunity. Front Oncol 2012; 2:136. [PMID: 23087900 PMCID: PMC3467457 DOI: 10.3389/fonc.2012.00136] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Accepted: 09/20/2012] [Indexed: 01/01/2023] Open
Abstract
Recent experimental findings show that activation of the host immune system is required for the success of chemo- and radiotherapy. However, clinically apparent tumors have already developed multiple mechanisms to escape anti-tumor immunity. The fact that tumors are able to induce a state of tolerance and immunosuppression is a major obstacle in immunotherapy. Hence, there is an overwhelming need to develop new strategies that overcome this state of immune tolerance and induce an anti-tumor immune response both at primary and metastatic sites. Nanovectorized radiotherapy that combines ionizing radiation and nanodevices, is one strategy that could boost the quality and magnitude of an immune response in a predictable and designable fashion. The potential benefits of this emerging treatment may be based on the unique combination of immunostimulatory properties of nanoparticles with the ability of ionizing radiation to induce immunogenic tumor cell death. In this review, we will discuss available data and propose that the nanovectorized radiotherapy could be a powerful new strategy to induce anti-tumor immunity required for positive patient outcome.
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Affiliation(s)
- Claire Vanpouille-Box
- LUNAM Université, Université d'Angers Angers, France ; INSERM U1066 Micro et Nanomedecines Biomimétiques Angers, France
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Raghuwanshi D, Mishra V, Suresh MR, Kaur K. A simple approach for enhanced immune response using engineered dendritic cell targeted nanoparticles. Vaccine 2012; 30:7292-9. [PMID: 23022399 DOI: 10.1016/j.vaccine.2012.09.036] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 08/31/2012] [Accepted: 09/16/2012] [Indexed: 11/30/2022]
Abstract
In this study, we demonstrate a simple strategy for enhanced immune response using a two-component dendritic cell (DC) targeted antigen delivery system. One component consists of a recombinant bifunctional fusion protein (bfFp) used for DC targeting, whereas, the other component is made of biotinylated PLGA nanoparticles that encapsulate the antigen. The fusion protein (bfFp) made of a truncated core-streptavidin fused to anti-DEC-205 single chain antibody (scFv) was mixed with ovalbumin-loaded biotinylated NPs that were formulated using biotin-PEG (2000)-PLGA, and the combination, bfFp functionalized NPs was used for DC targeted antigen delivery. In vitro DC uptake studies revealed a 2-fold higher receptor-mediated uptake of bfFp functionalized NPs when compared to non-targeted NPs. Immunization of the mice with the bfFp functionalized NPs in conjunction with DC maturation stimulus (anti-CD40 mAb) enhanced OVA-specific IgG and IgG subclass responses. Splenocytes of these mice secreted significantly higher levels of Th1 (IFN-γ and IL-2) cytokines upon ex vivo restimulation with OVA. The promising outcomes of the bfFp functionalized DC targeted system support its use as a versatile vaccine delivery system for the design of monovalent or polyvalent vaccines.
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Liu P, Yu H, Sun Y, Zhu M, Duan Y. A mPEG-PLGA-b-PLL copolymer carrier for adriamycin and siRNA delivery. Biomaterials 2012; 33:4403-12. [DOI: 10.1016/j.biomaterials.2012.02.041] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2011] [Accepted: 02/23/2012] [Indexed: 10/28/2022]
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20
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Jiang Z, Sun C, Yin Z, Zhou F, Ge L, Liu X, Kong F. Comparison of two kinds of nanomedicine for targeted gene therapy: premodified or postmodified gene delivery systems. Int J Nanomedicine 2012; 7:2019-31. [PMID: 22619539 PMCID: PMC3356208 DOI: 10.2147/ijn.s30928] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The applications of ligand-polyethylene glycol (PEG)-modified nanocarriers have now emerged, as well as recognized strategies to provide the vectors with active targeting properties. In this research, premodification and postmodification were compared using the same ligand, ie, a novel conjugated mannan-containing PEG and L-α-phosphatidylethanolamine (PE). METHODS Premodified and postmodified solid lipid nanoparticles were prepared and the characteristics of the two kinds of vehicles were evaluated. The modified vectors were then administered intravenously to rats and the in vivo targeting behavior of the complexes was investigated in liver macrophages. RESULTS By carefully formulating the carriers with an optimal ratio of mannan-containing PEG-PE, postmodified vehicles displayed more efficient gene expression in rat Kupffer cells both in vitro and in vivo. CONCLUSION Postmodified gene carriers are superior to premodified gene vectors, although the latter is also promising for targeted gene delivery. This discovery could guide our future research.
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Affiliation(s)
- Zhaoshun Jiang
- General Hospital of Ji'nan Command, PLA, Ji'nan, Shandong, China
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21
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Yan H, Jiang W, Zhang Y, Liu Y, Wang B, Yang L, Deng L, Singh GK, Pan J. Novel multi-biotin grafted poly(lactic acid) and its self-assembling nanoparticles capable of binding to streptavidin. Int J Nanomedicine 2012; 7:457-65. [PMID: 22334778 PMCID: PMC3273980 DOI: 10.2147/ijn.s24011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Targeted drug delivery requires novel biodegradable, specific binding systems with longer circulation time. The aim of this study was to prepare biotinylated poly(lactic acid) (PLA) nanoparticles (NPs) which can meet regular requirements as well conjugate more biotins in the polymer to provide better binding with streptavidin. A biotin-graft-PLA was synthesized based on previously published biodegradable poly(ethylene glycol) (PEG)-graft-PLA, with one polymer molecule containing three PEG molecules. Newly synthesized biotin-graft-PLA had three biotins per polymer molecule, higher than the previous biotinylated PLA (≤1 biotin per polymer molecule). A PEG with a much lower molecular weight (MW ~1900) than the previous biotinylated PLA (PEG MW ≥ 3800), and thus more biocompatible, was used which supplied good nonspecific protein-resistant property compatible to PEG-graft-PLA, suggesting its possible longer stay in the bloodstream. Biotin-graft-PLA specifically bound to streptavidin and self-assembled into NPs, during which naproxen, a model small molecule (MW 230 Da) and hydrophobic drug, was encapsulated (encapsulation efficiency 51.88%). The naproxen-loaded NPs with particle size and zeta potential of 175 nm and −27.35 mV realized controlled release within 170 hours, comparable to previous studies. The biotin-graft-PLA NPs adhered approximately two-fold more on streptavidin film and on biotin film via a streptavidin arm both in static and dynamic conditions compared with PEG-graft-PLA NPs, the proven nonspecific protein-resistant NPs. The specific binding of biotin-graft-PLA NPs with streptavidin and with biotin using streptavidin arm, as well as its entrapment and controlled release for naproxen, suggest potential applications in targeted drug delivery.
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Affiliation(s)
- Hao Yan
- Bioengineering College, Chongqing University, Chongqing, People's Republic of China
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22
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Babiuch K, Gottschaldt M, Werz O, Schubert US. Particulate transepithelial drug carriers: barriers and functional polymers. RSC Adv 2012. [DOI: 10.1039/c2ra20726e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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23
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Jin J, Wu D, Sun P, Liu L, Zhao H. Amphiphilic Triblock Copolymer Bioconjugates with Biotin Groups at the Junction Points: Synthesis, Self-Assembly, and Bioactivity. Macromolecules 2011. [DOI: 10.1021/ma102398c] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jie Jin
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Department of Chemistry and ‡Institute of Polymer Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Dongxia Wu
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Department of Chemistry and ‡Institute of Polymer Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Pingchuan Sun
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Department of Chemistry and ‡Institute of Polymer Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Li Liu
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Department of Chemistry and ‡Institute of Polymer Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Hanying Zhao
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Department of Chemistry and ‡Institute of Polymer Chemistry, Nankai University, Tianjin 300071, P. R. China
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24
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Yadav SC, Kumari A, Yadav R. Development of peptide and protein nanotherapeutics by nanoencapsulation and nanobioconjugation. Peptides 2011; 32:173-87. [PMID: 20934475 DOI: 10.1016/j.peptides.2010.10.003] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Revised: 10/02/2010] [Accepted: 10/03/2010] [Indexed: 11/17/2022]
Abstract
The targeted delivery of therapeutic peptide by nanocarriers systems requires the knowledge of interactions of nanomaterials with the biological environment, peptide release, and stability of therapeutic peptides. Therapeutic application of nanoencapsulated peptides are increasing exponentially and >1000 peptides in nanoencapsulated form are in different clinical/trial phase. This review covers current scenario of therapeutic protein and peptides encapsulation on polymer to metallic nanocarriers including methods of protein encapsulation, peptide bioconjugation on nanoparticles, stability enhancement of encapsulated proteins and its biomedical applications.
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Affiliation(s)
- Subhash Chandra Yadav
- Nanobiology Lab, Biotechnology Division, Institute of Himalayan Bioresource Technology, Council of Scientific and Industrial Research, Palampur 176061 HP India.
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25
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Romero G, Estrela-Lopis I, Zhou J, Rojas E, Franco A, Espinel CS, Fernández AG, Gao C, Donath E, Moya SE. Surface engineered Poly(lactide-co-glycolide) nanoparticles for intracellular delivery: uptake and cytotoxicity--a confocal raman microscopic study. Biomacromolecules 2010; 11:2993-9. [PMID: 20882998 DOI: 10.1021/bm1007822] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Confocal Raman Microscopy (CRM) is used to study the cell internalization of poly(lactide-co-glycolide) (PLGA) nanoparticles (NPs) fabricated by emulsion techniques with either poly(ethylene imine) (PEI) or bovine serum albumin (BSA) as surface stabilizers. HepG2 cells were exposed to PEI and BSA stabilized PLGA NPs. Spontaneous Confocal Raman Spectra taken in one and the same spot of exposed cells showed bands arising from the cellular environment as well as bands characteristic for PLGA, proving that the PLGA NPs have been internalized. It was found that PLGA NPs preferentially colocalize with lipid bodies. The results from Raman spectroscopy are compared with flow cytometry and confocal scanning laser microscopy (CLSM) data. The advantages of CRM as a label-free technique over flow cytometry and CLSM are discussed. Additionally, cell viability studies by means of quick cell counting solution and MTT tests in several cell lines show a generally low toxicity for both PEI and BSA stabilized PLGA NPs, with BSA stabilized PLGA NPs having an even lower toxicity than PEI stabilized.
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Affiliation(s)
- Gabriela Romero
- CIC BiomaGUNE, Paseo Miramón 182 Ed. Emp. C, San Sebastián, Spain, Institute of Biophysics and Medical Physics, University of Leipzig, Leipzig, Germany, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China, and Laboratorio de Inmunología, Edificio Ciencias Experimentales, Campus Lagoas Marcosende, Universidad de Vigo, CP 36310, Vigo, Pontevedra, Spain
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26
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Krpetić Z, Nativo P, Porta F, Brust M. A multidentate peptide for stabilization and facile bioconjugation of gold nanoparticles. Bioconjug Chem 2010; 20:619-24. [PMID: 19220052 DOI: 10.1021/bc8003028] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Gold nanoparticles of two different sizes stabilized by a 15-mer peptide ligand specifically designed for this purpose have been prepared in aqueous solution and characterized by UV-vis spectroscopy and TEM. The presence of the ligand and its binding mode to the particles via its four cystein thiols is evidenced by FTIR and NMR spectroscopy. Biotinylation of the particles via binding to a freely accessible lysine residue is demonstrated.
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Affiliation(s)
- Zeljka Krpetić
- Dipartimento di Chimica Inorganica Metallorganica Analitica Lamberto Malatesta, University of Milan, Via Venezian 21, Milan, Italy
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27
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Andersen MØ, Lichawska A, Arpanaei A, Rask Jensen SM, Kaur H, Oupicky D, Besenbacher F, Kingshott P, Kjems J, Howard KA. Surface functionalisation of PLGA nanoparticles for gene silencing. Biomaterials 2010; 31:5671-7. [PMID: 20434215 DOI: 10.1016/j.biomaterials.2010.03.069] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2010] [Accepted: 03/26/2010] [Indexed: 11/27/2022]
Abstract
This work presents a method for decorating the surface of poly (lactide-co-glycolide) (PLGA) nanoparticles with polyethyleneimine (PEI) utilising a cetyl derivative to improve surface functionalisation and siRNA delivery. Sub-micron particles were produced by an emulsion-diffusion method using benzyl alcohol. We demonstrate by x-ray photoelectron spectroscopy (XPS), 2.6 times higher surface presentation of amines using the cetyl derivative compared to non-cetylated-PEI formulations (6.5 and 2.5% surface nitrogen, respectively). The modified particles were shown by spectroscopy, fluorescent microscopy and flow cytometry to bind and mediate siRNA delivery into the human osteosarcoma cell line U2OS and the murine macrophage cell line J774.1. Specific reduction in the anti-apoptotic oncogene BCL-w in U2OS cells was achieved with particles containing cetylated-PEI (53%) with no cellular toxicity. In addition, particles containing cetylated-PEI achieved 64% silencing of TNFalpha in J774.1 cells. This rapid method for surface modification of PLGA nanoparticles promotes its application for alternative cetylated functional derivatives as a strategy to control specific biological properties of nanoparticles.
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Affiliation(s)
- Morten Ø Andersen
- Interdisciplinary Nanoscience Center (iNANO), Ny Munkegade 118, University of Aarhus, Aarhus C, Denmark
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28
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Chen W, Zhan C, Gu B, Meng Q, Wang H, Lu W, Hou H. Targeted brain delivery of itraconazole via RVG29 anchored nanoparticles. J Drug Target 2010; 19:228-34. [PMID: 20540685 DOI: 10.3109/1061186x.2010.492523] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The blood-brain barrier is a major barrier in the neurological diseases treatment and precludes the entry of drugs from blood to brain. Here, we developed 29-amino-acid peptide derived from rabies virus glycoprotein (RVG29) peptide conjugated itraconazole-loaded albumin nanoparticles (RVG29-ITZ-NPs). The RVG29 peptide was conjugated to the albumin NPs using biotin-binding streptavidin as crosslinker. The NPs were characterized in terms of particle size, zeta potential, drug loading and release behavior in vitro. Cellular uptake of RVG29-ITZ-NPs was investigated by flow cytometry. Pharmacokinetics and brain distribution of RVG29-ITZ-NPs were investigated after intravenous administration of NPs. The particle size of RVG29-ITZ-NPs was 89.3 ± 1.9 nm as determined by dynamic light scattering. The zeta potential of RVG29-ITZ-NPs was -33.1 ± 0.9 mV. RVG29-ITZ-NPs exhibited a sustained release profile within 24 h. In vitro cellular uptake studies demonstrated that RVG29 significantly facilitated the intracellular delivery of NPs. A significant (P < 0.05) accumulation of ITZ in brain was observed for RVG29-ITZ-NPs as compared with ITZ-NPs and cyclodextrin formulation of ITZ (ITZ-CD). These results suggested that RVG29-ITZ-NPs can be exploited as a potential therapeutic formulation for the intracranial fungal infection.
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Affiliation(s)
- Wei Chen
- Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
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29
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Look M, Bandyopadhyay A, Blum JS, Fahmy TM. Application of nanotechnologies for improved immune response against infectious diseases in the developing world. Adv Drug Deliv Rev 2010; 62:378-93. [PMID: 19922750 DOI: 10.1016/j.addr.2009.11.011] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2009] [Accepted: 09/14/2009] [Indexed: 12/31/2022]
Abstract
There is an urgent need for new strategies to combat infectious diseases in developing countries. Many pathogens have evolved to elude immunity and this has limited the utility of current therapies. Additionally, the emergence of co-infections and drug resistant pathogens has increased the need for advanced therapeutic and diagnostic strategies. These challenges can be addressed with therapies that boost the quality and magnitude of an immune response in a predictable, designable fashion that can be applied for wide-spread use. Here, we discuss how biomaterials and specifically nanoscale delivery vehicles can be used to modify and improve the immune system response against infectious diseases. Immunotherapy of infectious disease is the enhancement or modulation of the immune system response to more effectively prevent or clear pathogen infection. Nanoscale vehicles are particularly adept at facilitating immunotherapeutic approaches because they can be engineered to have different physical properties, encapsulated agents, and surface ligands. Additionally, nanoscaled point-of-care diagnostics offer new alternatives for portable and sensitive health monitoring that can guide the use of nanoscale immunotherapies. By exploiting the unique tunability of nanoscale biomaterials to activate, shape, and detect immune system effector function, it may be possible in the near future to generate practical strategies for the prevention and treatment of infectious diseases in the developing world.
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30
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Jia L, Zheng JJ, Jiang SM, Huang KH. Preparation, physicochemical characterization and cytotoxicity in vitro of gemcitabine-loaded PEG-PDLLA nanovesicles. World J Gastroenterol 2010; 16:1008-13. [PMID: 20180242 PMCID: PMC2828587 DOI: 10.3748/wjg.v16.i8.1008] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the preparation, physicochemical characterization and cytotoxicity in vitro of Gemcitabine-loaded poly(ethylene glycol)-block-poly(D,L-lactide) (PEG-PDLLA) nanovesicles.
METHODS: The nanovesicle carriers were prepared from the amphiphilic block copolymer of PEG-PDLLA by a double emulsion technique, and gemcitabine was used as the model drug. The morphology of the nanovesicles was determined by scanning and transmission electron microscopy, and the drug content, drug entrapment and drug-release curve in vitro were detected by UV-Vis-NIR spectrophotometry. Cytotoxicity in the human pancreatic cancer cell line SW1990 was tested by 3-(4,5-dimethyl) ethiazole (MTT) assay.
RESULTS: The gemcitabine-loaded nanovesicles were hollow nanospheres with a mean size of 200.6 nm, drug loading of 4.14% and drug embedding ratio of 20.54%. The nanovesicles showed excellent controlled release that was characterized by a fast initial release during the first 72 h, followed by a slower and continuous release. The MTT assay demonstrated that gemcitabine-loaded nanovesicles exhibited dose-dependent and time-delayed cytotoxicity in the human pancreatic cancer cell line SW1990.
CONCLUSION: Gemcitabine-loaded PEG-PDLLA nanovesicles prepared by a double emulsion technique exhibited good performance for controlled drug release, and had similar cytotoxic activity to free gemcitabine.
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31
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Zhou J, Romero G, Rojas E, Moya S, Ma L, Gao C. Folic Acid Modified Poly(lactide-co
-glycolide) Nanoparticles, Layer-by-Layer Surface Engineered for Targeted Delivery. MACROMOL CHEM PHYS 2010. [DOI: 10.1002/macp.200900514] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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32
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Synthesizing and binding dual-mode poly (lactic-co-glycolic acid) (PLGA) nanobubbles for cancer targeting and imaging. Biomaterials 2009; 31:1716-22. [PMID: 20006382 DOI: 10.1016/j.biomaterials.2009.11.052] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2009] [Accepted: 11/17/2009] [Indexed: 11/22/2022]
Abstract
Accurate assessment of tumor boundaries and recognition of occult disease are important oncologic principles in cancer surgeries. However, existing imaging modalities are not optimized for intraoperative cancer imaging applications. We developed a nanobubble (NB) contrast agent for cancer targeting and dual-mode imaging using optical and ultrasound (US) modalities. The contrast agent was fabricated by encapsulating the Texas Red dye in poly (lactic-co-glycolic acid) (PLGA) NBs and conjugating NBs with cancer-targeting ligands. Both one-step and three-step cancer-targeting strategies were tested on the LS174T human colon cancer cell line. For the one-step process, NBs were conjugated with the humanized HuCC49 Delta C(H)2 antibody to target the over-expressed TAG-72 antigen. For the three-step process, cancer cells were targeted by successive application of the biotinylated HuCC49 Delta C(H)2 antibody, streptavidin, and the biotinylated NBs. Both one-step and three-step processes successfully targeted the cancer cells with high binding affinity. NB-assisted dual-mode imaging was demonstrated on a gelatin phantom that embedded multiple tumor simulators at different NB concentrations. Simultaneous fluorescence and US images were acquired for these tumor simulators and linear correlations were observed between the fluorescence/US intensities and the NB concentrations. Our research demonstrated the technical feasibility of using the dual-mode NB contrast agent for cancer targeting and simultaneous fluorescence/US imaging.
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Kogot JM, Parker AM, Lee J, Blaber M, Strouse GF, Logan TM. Analysis of the Dynamics of Assembly and Structural Impact for a Histidine Tagged FGF1−1.5 nm Au Nanoparticle Bioconjugate. Bioconjug Chem 2009; 20:2106-13. [DOI: 10.1021/bc900224d] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Joshua M. Kogot
- Department of Chemistry and Biochemistry and Kasha Laboratory Institute of Molecular Biophysics, and Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, Florida 32306
| | - Alex M. Parker
- Department of Chemistry and Biochemistry and Kasha Laboratory Institute of Molecular Biophysics, and Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, Florida 32306
| | - Jihun Lee
- Department of Chemistry and Biochemistry and Kasha Laboratory Institute of Molecular Biophysics, and Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, Florida 32306
| | - Michael Blaber
- Department of Chemistry and Biochemistry and Kasha Laboratory Institute of Molecular Biophysics, and Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, Florida 32306
| | - Geoffrey F. Strouse
- Department of Chemistry and Biochemistry and Kasha Laboratory Institute of Molecular Biophysics, and Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, Florida 32306
| | - Timothy M. Logan
- Department of Chemistry and Biochemistry and Kasha Laboratory Institute of Molecular Biophysics, and Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, Florida 32306
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Bae JW, Lee E, Park KM, Park KD. Vinyl Sulfone-Terminated PEG−PLLA Diblock Copolymer for Thiol-Reactive Polymeric Micelle. Macromolecules 2009. [DOI: 10.1021/ma900185x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jin Woo Bae
- Department of Molecular Science and Technology, Ajou University, 5 Woncheon, Yeongtong, Suwon 443-749, Korea
| | - Eugene Lee
- Department of Molecular Science and Technology, Ajou University, 5 Woncheon, Yeongtong, Suwon 443-749, Korea
| | - Kyung Min Park
- Department of Molecular Science and Technology, Ajou University, 5 Woncheon, Yeongtong, Suwon 443-749, Korea
| | - Ki Dong Park
- Department of Molecular Science and Technology, Ajou University, 5 Woncheon, Yeongtong, Suwon 443-749, Korea
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35
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Phospholipid decoration of microcapsules containing perfluorooctyl bromide used as ultrasound contrast agents. Biomaterials 2008; 30:1462-72. [PMID: 19097640 DOI: 10.1016/j.biomaterials.2008.11.032] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2008] [Accepted: 11/27/2008] [Indexed: 11/20/2022]
Abstract
We present here an easy method to modify the surface chemistry of polymeric microcapsules of perfluorooctyl bromide used as ultrasound contrast agents (UCAs). Capsules were obtained by a solvent emulsification-evaporation process with phospholipids incorporated in the organic phase before emulsification. Several phospholipids were reviewed: fluorescent, pegylated and biotinylated phospholipids. The influence of phospholipid concentration on microcapsule size and morphology was evaluated. Only a fraction of the phospholipids is associated to microcapsules, the rest being dissolved with the surfactant in the aqueous phase. Microscopy shows that phospholipids are present within the shell and that the core/shell structure is preserved up to 0.5 mg fluorescent phospholipids, up to about 0.25 mg pegylated phospholipids or biotinylated phospholipids (for 100 mg of polymer, poly(lactide-co-glycolide) (PLGA)). HPLC allows quantifying phospholipids associated to capsules: they correspond to 10% of pegylated phospholipids introduced in the organic phase. The presence of pegylated lipids at the surface of capsules was confirmed by X-ray photon electron spectroscopy (XPS). The pegylation did not modify the echographic signal arising from capsules. Finally biotinylated microcapsules incubated with neutravidin tend to aggregate, which confirms the presence of biotin at the surface. These results are encouraging and future work will consist of nanocapsule surface modification for molecular imaging.
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Quan CY, Sun YX, Cheng H, Cheng SX, Zhang XZ, Zhuo RX. Thermosensitive P(NIPAAm-co-PAAc-co-HEMA) nanogels conjugated with transferrin for tumor cell targeting delivery. NANOTECHNOLOGY 2008; 19:275102. [PMID: 21828695 DOI: 10.1088/0957-4484/19/27/275102] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Multifunctional and thermosensitive poly(N-isopropylacrylamide-co-propyl acrylic acid-co-hydroxyethyl methacrylate) (P(NIPAAm-co-PAAc-co-HEMA)) nanogels were prepared by miniemulsion polymerization. The mean sizes of the nanogels measured by dynamic light scattering (DLS) varied from 120 to 400 nm with an increase in temperature. Transmission electron microscopy (TEM) showed that the nanogels displayed well-dispersed spherical morphology. The nanogels were conjugated by human transferrin (Tf) and the coupling of transferrin molecules with nanogels was verified by UV-vis spectroscopy. The cytotoxicity study indicated that the nanogels did not exhibit apparent cytotoxicity. Fluorescence spectroscopy analysis as well as confocal laser scanning microscopy (CLSM) was used to confirm that the Tf-conjugated nanogels could specifically bind to A549 tumor cells. In addition, the Tf-conjugated nanogels loaded with Doxorubicin (Dox) could efficiently release the drug inside the cell, suggesting that the Tf-conjugated nanogels are useful drug carriers for tumor cell targeting.
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Affiliation(s)
- Chang-Yun Quan
- Key Laboratory of Biomedical Polymers of Ministry of Education and Department of Chemistry, Wuhan University, Wuhan 430072, People's Republic of China
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Abstract
Proteins are of crucial importance in all biologic organisms, in terms of both structure and function. Their deficits play central roles in many pathologic states, and their potential as powerful therapeutic agents has been widely recognized. Many issues, however, exist in delivery of biologically active proteins to target tissues and organs. Recent advances in biomedical engineering have lead to development of advanced techniques for controlled delivery of peptides and proteins, paving the way for their efficient use in treating human injury and disease. With a particular emphasis on most recent advances, this review discusses currently available techniques for controlled delivery of proteins and considers future research directions.
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Affiliation(s)
- Serge Kobsa
- Department of Biomedical Engineering, Yale University, New Haven, CT 06520, USA
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38
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Nafee N, Schneider M, Lehr CM. Charge Modification of Pharmaceutical Nanocarriers: Biological Implications. MULTIFUNCTIONAL PHARMACEUTICAL NANOCARRIERS 2008. [DOI: 10.1007/978-0-387-76554-9_11] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Townsend SA, Evrony GD, Gu FX, Schulze MP, Brown RH, Langer RS. Tetanus toxin C fragment-conjugated nanoparticles for targeted drug delivery to neurons. Biomaterials 2007; 28:5176-84. [PMID: 17854886 PMCID: PMC2435502 DOI: 10.1016/j.biomaterials.2007.08.011] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2007] [Accepted: 08/02/2007] [Indexed: 02/02/2023]
Abstract
The use of nanoparticles for targeted drug delivery is often facilitated by specific conjugation of functional targeting molecules to the nanoparticle surface. We compared different biotin-binding proteins (avidin, streptavidin, or neutravidin) as crosslinkers to conjugate proteins to biodegradable nanoparticles prepared from poly(lactic-co-glycolic acid) (PLGA)-polyethylene glycol (PEG)-biotin polymers. Avidin gave the highest levels of overall protein conjugation, whereas neutravidin minimized protein non-specific binding to the polymer. The tetanus toxin C fragment (TTC), which is efficiently retrogradely transported in neurons and binds to neurons with high specificity and affinity, retained the ability to bind to neuroblastoma cells following amine group modifications. TTC was conjugated to nanoparticles using neutravidin, and the resulting nanoparticles were shown to selectively target neuroblastoma cells in vitro. TTC-conjugated nanoparticles have the potential to serve as drug delivery vehicles targeted to the central nervous system.
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Affiliation(s)
- Seth A. Townsend
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Gilad D. Evrony
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Frank X. Gu
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Martin P. Schulze
- Institute for Pharmacy and Molecular Biotechnology, University of Heidelberg, Im Neuenheimer Feld 580, Heidelberg, 69120, Germany
| | - Robert H. Brown
- Day Neuromuscular Research Laboratory, Massachusetts General Hospital East, 16 Street, Charlestown, MA, 02129, USA
| | - Robert S. Langer
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Address to whom correspondence should be addressed: email , fax (617)258-8827
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