1
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Kato M, Yamaguchi M, Morita T, Watanabe N, Ota S, Yamamoto E. A method for purifying nanoparticles using cationic modified monoliths and aqueous elution. J Chromatogr A 2022; 1664:462802. [PMID: 35030531 DOI: 10.1016/j.chroma.2021.462802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 12/21/2021] [Accepted: 12/31/2021] [Indexed: 11/15/2022]
Abstract
Nanoparticles are widely used in the medical field for diagnosis and therapy. In particular, the use of nanoparticles containing vaccines has spread rapidly; hence, ensuring nanoparticle safety and minimizing their side effects have become important concerns worldwide. In this study, we used three types (NH2, poly-Lys, and trimethylaminopropyl) of cationic modified silica monoliths with cylindrical structures, diameters of 4.2 mm, and heights of 1.5 mm. Doxil, an anticancer nanomedicine, and exosomes, as typical nanoparticles, were separated from model leaked drugs (e.g., doxorubicin and oligonucleotides) and proteins (e.g., albumin) coexisting in nanoparticle sample solutions using these monoliths. Each nanoparticle solution (200 μL) was applied to each monolith followed by centrifugation at 9,100 g for 1 min. The ionic concentration of the elution solution was increased stepwise to determine the concentration required to elute the nanoparticles from each monolith by centrifugation. The NH2- and poly-Lys-modified monoliths separated and purified nanoparticles from leaked drugs or proteins coexisting in nanoparticle sample solutions. The nanoparticles were separated from other substances by changing the pH and concentration of the aqueous Tris buffer used as the eluent. Doxil was eluted with 500-1,000 mM Tris buffer (pH 8) when using the NH2-modified monolith, and with 200-1,000 mM Tris buffer (pH 6) when using the poly-Lys-modified monolith. Exosome was obtained using 1,000 mM Tris buffer (pH 8) and the NH2-modified monolith. The recovery efficiencies (ratio of nanoparticle content in the most abundant fraction to that in the sample solution before purification) of Doxil and exosome were 64% and 55%, respectively. Because this method can purify nanoparticles using only low-speed centrifugation for a few minutes, we expect it will be used to improve nanoparticle safety.
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Affiliation(s)
- Masaru Kato
- Department of Bioanalytical Chemistry, School of Pharmacy, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan.
| | - Misa Yamaguchi
- Department of Bioanalytical Chemistry, School of Pharmacy, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Tomoka Morita
- Department of Bioanalytical Chemistry, School of Pharmacy, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Noriko Watanabe
- Department of Bioanalytical Chemistry, School of Pharmacy, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Shigenori Ota
- GL Sciences Inc. 237-2 Sayamagahara, Iruma, Saitama, 358-0032, Japan
| | - Eiichi Yamamoto
- Division of Drugs, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki City, Kanagawa, 210-9501, Japan
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2
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Bian J, Girotti J, Fan Y, Levy ES, Zang N, Sethuraman V, Kou P, Zhang K, Gruenhagen J, Lin J. Fast and versatile analysis of liposome encapsulation efficiency by nanoParticle exclusion chromatography. J Chromatogr A 2021; 1662:462688. [PMID: 34915190 DOI: 10.1016/j.chroma.2021.462688] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 11/11/2021] [Accepted: 11/14/2021] [Indexed: 01/05/2023]
Abstract
Liposomes are an attractive drug delivery platform for a wide variety of pharmaceutical molecules. Encapsulation efficiency, which refers to the amount of drug contained inside liposomes compared with the total amount of drug, is a critical quality attribute of liposome products, as the free drug in a liposomal formulation may cause toxicity or undesired biodistribution. The determination of encapsulation efficiency requires the measurement of at least two of the three drug populations: total drug, encapsulated drug and free drug. However, direct measurement of the encapsulated drug and free drug remains a challenging analytical task. Nanoparticle exclusion chromatography (nPEC), an emerging high-performance liquid chromatography (HPLC) technique, has shown great potential in separating and quantifying the free drug in liposomal formulations. In this study, nPEC was systematically evaluated for two representative liposomal formulations containing either hydrophilic or hydrophobic small molecule drugs. It is reported for the first time that the insoluble free drug suspended in the aqueous formulation can be directly measured by nPEC. This free drug in the suspension sample was quantified with excellent accuracy and precision. On the other hand, the total drug measurement from dissociated liposomes was confirmed by the benchmark methodology of reversed phase liquid chromatography (RPLC). The facile quantitation of free and total drug in the liposome formulation enables the fast and accurate determination of the encapsulation efficiency, which can be used to guide the formulation development and characterize the product quality.
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Affiliation(s)
- Juan Bian
- Genentech Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - James Girotti
- Genentech Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Yuchen Fan
- Genentech Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Elizabeth S Levy
- Genentech Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Nanzhi Zang
- Genentech Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Vijay Sethuraman
- Genentech Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Ponien Kou
- Genentech Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Kelly Zhang
- Genentech Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Jason Gruenhagen
- Genentech Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA
| | - Jessica Lin
- Genentech Research and Early Development, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA.
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3
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Bongaerts E, Nawrot TS, Van Pee T, Ameloot M, Bové H. Translocation of (ultra)fine particles and nanoparticles across the placenta; a systematic review on the evidence of in vitro, ex vivo, and in vivo studies. Part Fibre Toxicol 2020; 17:56. [PMID: 33138843 PMCID: PMC7607677 DOI: 10.1186/s12989-020-00386-8] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 10/20/2020] [Indexed: 12/19/2022] Open
Abstract
Fetal development is a crucial window of susceptibility in which exposure may lead to detrimental health outcomes at birth and later in life. The placenta serves as a gatekeeper between mother and fetus. Knowledge regarding the barrier capacity of the placenta for nanoparticles is limited, mostly due to technical obstacles and ethical issues. We systematically summarize and discuss the current evidence and define knowledge gaps concerning the maternal-fetal transport and fetoplacental accumulation of (ultra)fine particles and nanoparticles. We included 73 studies on placental translocation of particles, of which 21 in vitro/ex vivo studies, 50 animal studies, and 2 human studies on transplacental particle transfer. This systematic review shows that (i) (ultra)fine particles and engineered nanoparticles can bypass the placenta and reach fetal units as observed for all the applied models irrespective of the species origin (i.e., rodent, rabbit, or human) or the complexity (i.e., in vitro, ex vivo, or in vivo), (ii) particle size, particle material, dose, particle dissolution, gestational stage of the model, and surface composition influence maternal-fetal translocation, and (iii) no simple, standardized method for nanoparticle detection and/or quantification in biological matrices is available to date. Existing evidence, research gaps, and perspectives of maternal-fetal particle transfer are highlighted.
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Affiliation(s)
- Eva Bongaerts
- Centre for Environmental Sciences, Hasselt University, Agoralaan Building D, 3590, Diepenbeek, Belgium
| | - Tim S Nawrot
- Centre for Environmental Sciences, Hasselt University, Agoralaan Building D, 3590, Diepenbeek, Belgium
- Department of Public Health and Primary Care, KU Leuven, Herestraat 49, Box 703, 3000, Leuven, Belgium
| | - Thessa Van Pee
- Centre for Environmental Sciences, Hasselt University, Agoralaan Building D, 3590, Diepenbeek, Belgium
| | - Marcel Ameloot
- Biomedical Research Institute, Hasselt University, Agoralaan Building C, 3590, Diepenbeek, Belgium
| | - Hannelore Bové
- Centre for Environmental Sciences, Hasselt University, Agoralaan Building D, 3590, Diepenbeek, Belgium.
- Biomedical Research Institute, Hasselt University, Agoralaan Building C, 3590, Diepenbeek, Belgium.
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Kato M, Athumi Y, Yamaguchi M, Date H, Yamamoto E, Murayama S, Karasawa K. Trimethylammonium modification of a polymer-coated monolith column for rapid and simultaneous analysis of nanomedicines. J Chromatogr A 2020; 1617:460826. [PMID: 31902575 DOI: 10.1016/j.chroma.2019.460826] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 12/09/2019] [Accepted: 12/23/2019] [Indexed: 10/25/2022]
Abstract
Drug-containing nanoparticles (nanomedicine) are ideal targeted-drug-delivery systems. However, methods for the simultaneous analysis of the drug within the nanoparticle and free drug in a short time are rather limited. In this study, we developed a polymer-modified monolithic column with cationic groups (trimethylammonium) for the simultaneous analysis of the drug within the nanoparticle and the free drug. The use of the acrylamide group was determined as the optimum connecting group, and the optimum concentration of the modifier was 6%. The prepared column retained the drug within the nanoparticle by anion exchange, and its elution time was controlled by the ionic concentration (tris(hydroxymethyl)aminomethane, Tris) of the mobile phase. The separation of two typical nanomedicines was studied on the prepared column. For DOXIL and Abraxane, the drugs within the nanoparticle were well separated from the free drugs, on the developed column. The developed polymer-coated monolithic column with trimethylammonium modification is expected to enable the rapid analysis of various nanomedicines.
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Affiliation(s)
- Masaru Kato
- Devision of Bioanalytical Chemistry, School of Pharmacy, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan.
| | - Yukino Athumi
- Devision of Bioanalytical Chemistry, School of Pharmacy, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Misa Yamaguchi
- Devision of Bioanalytical Chemistry, School of Pharmacy, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Haruka Date
- Devision of Bioanalytical Chemistry, School of Pharmacy, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Eiichi Yamamoto
- Division of Drugs, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki City, Kanagawa, 210-9501, Japan
| | - Shuhei Murayama
- Devision of Bioanalytical Chemistry, School of Pharmacy, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Koji Karasawa
- Devision of Bioanalytical Chemistry, School of Pharmacy, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
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5
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Insights on Ultrafiltration-Based Separation for the Purification and Quantification of Methotrexate in Nanocarriers. Molecules 2020; 25:molecules25081879. [PMID: 32325744 PMCID: PMC7221554 DOI: 10.3390/molecules25081879] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 04/06/2020] [Accepted: 04/14/2020] [Indexed: 12/18/2022] Open
Abstract
The evaluation of encapsulation efficiency is a regulatory requirement for the characterization of drug delivery systems. However, the difficulties in efficiently separating nanomedicines from the free drug may compromise the achievement of accurate determinations. Herein, ultrafiltration was exploited as a separative strategy towards the evaluation of methotrexate (MTX) encapsulation efficiency in nanostructured lipid carriers and polymeric nanoparticles. The effect of experimental conditions such as pH and the amount of surfactant present in the ultrafiltration media was addressed aiming at the selection of suitable conditions for the effective purification of nanocarriers. MTX-loaded nanoparticles were then submitted to ultrafiltration and the portions remaining in the upper compartment of the filtering device and in the ultrafiltrate were collected and analyzed by HPLC-UV using a reversed-phase (C18) monolithic column. A short centrifugation time (5 min) was suitable for establishing the amount of encapsulated MTX in nanostructured lipid carriers, based on the assumption that the free MTX concentration was the same in the upper compartment and in the ultrafiltrate. The defined conditions allowed the efficient separation of nanocarriers from the free drug, with recoveries of >85% even when nanoparticles were present in cell culture media and in pig skin surrogate from permeation assays.
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6
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Di Mascolo D, Coclite A, Gentile F, Francardi M. Quantitative micro-Raman analysis of micro-particles in drug delivery. NANOSCALE ADVANCES 2019; 1:1541-1552. [PMID: 31304459 PMCID: PMC6592161 DOI: 10.1039/c8na00187a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 01/21/2019] [Indexed: 05/22/2023]
Abstract
Polymeric micro and nanoconstructs are emerging as promising delivery systems for therapeutics and contrast agents in microcirculation. Excellent assets associated with polymeric particulates of tunable shape, size, mechanical and chemical properties may improve the efficiency of delivery and represent the basis of personalized medicine and treatment. Nevertheless, lack of effective techniques of analysis may limit their use in biomedicine and bioengineering. In this paper, we demonstrated Raman Spectroscopy for quantitative characterization of poly lactic-co-glycolic acid (PLGA) micro-plate drug delivery systems. To do so, we (i) acquired bi-dimensional Raman maps of PLGA micro-plates loaded with curcumin at various times of release over multiple particles. We (ii) realized an exploratory analysis of data using the principal component analysis (PCA) technique to find hidden patterns in the data and reduce the dimensionality of the system. Then, we (iii) used an innovative univariate method of analysis of the reduced system to derive quantitative drug release profiles. High performance liquid chromatography (HPLC), the consolidated method of analysis of macro-sized systems, was used for comparison. We found that our system is as efficient as HPLC but, differently from HPLC, it enables quantitative analysis of systems at the single particle level.
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Affiliation(s)
| | - Alessandro Coclite
- School of Earth Sciences , University of Bristol , Queens Road Wills Memorial Building , Bristol , UK
| | - Francesco Gentile
- Department of Electrical Engineering and Information Technology , University Federico II , 80125 Naples , Italy
| | - Marco Francardi
- Italian Institute of Technology , 16163 Genova , Italy .
- GlassUp SRL , via Corassori 72 , 41124 , Modena , Italy
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7
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Enrichment of liposomal nanomedicines using monolithic solid phase extraction discs following preactivation with bivalent metal ion solutions. J Chromatogr A 2018; 1564:224-227. [PMID: 29907411 DOI: 10.1016/j.chroma.2018.06.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 06/03/2018] [Accepted: 06/05/2018] [Indexed: 11/22/2022]
Abstract
Silicate is an excellent adsorbent because of its large surface area and amenability to surface modification. In this study, the representative liposome nanomedicines DOXIL® and AmBisome® were enriched using a silica monolith disc (diameter 4.2 mm, length 1.5 mm) with bimodal pores. Although the nanoparticles passed through the disc without retention when water was used as the preactivation solution, they were strongly retained by the disc when a 1 M bivalent metal (such as Mg2+, Ca2+, and Ni2+) solution was used. Notably, strong affinity was observed to DOXIL, a pegylated liposomal nanoparticle, by the disc composed of 5 μm and 10 nm through- and meso pores, respectively, and nearly 100% of DOXIL was recovered from a 40× diluted solution. Overall, the results demonstrate that monolithic discs are effective for the enrichment of liposomal nanomedicines.
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8
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Yamamoto E, Miyazaki S, Aoyama C, Kato M. A simple and rapid measurement method of encapsulation efficiency of doxorubicin loaded liposomes by direct injection of the liposomal suspension to liquid chromatography. Int J Pharm 2018; 536:21-28. [DOI: 10.1016/j.ijpharm.2017.11.035] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 10/22/2017] [Accepted: 11/19/2017] [Indexed: 10/18/2022]
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9
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Stability and drug release studies of an antimycotic nanomedicine using HPLC, dynamic light scattering and atomic force microscopy. J Pharm Biomed Anal 2018; 148:149-155. [DOI: 10.1016/j.jpba.2017.09.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 09/22/2017] [Accepted: 09/23/2017] [Indexed: 11/21/2022]
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10
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High performance liquid chromatography analysis of 100-nm liposomal nanoparticles using polymer-coated, silica monolithic columns with aqueous mobile phase. J Chromatogr A 2017; 1484:34-40. [DOI: 10.1016/j.chroma.2016.12.080] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Revised: 11/23/2016] [Accepted: 12/28/2016] [Indexed: 11/22/2022]
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11
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Kimoto A, Watanabe A, Yamamoto E, Higashi T, Kato M. Rapid Analysis of DOXIL Stability and Drug Release from DOXIL by HPLC Using a Glycidyl Methacrylate-Coated Monolithic Column. Chem Pharm Bull (Tokyo) 2017; 65:945-949. [DOI: 10.1248/cpb.c17-00474] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Arato Kimoto
- Faculty of Pharmaceutical Sciences, Tokyo University of Science
| | - Ayako Watanabe
- Graduate School of Pharmaceutical Sciences, The University of Tokyo
| | - Eiichi Yamamoto
- Formulation Research, Pharmaceutical Science and Technology, Core Function Unit, Medicine Development Center, Eisai Co., Ltd
| | - Tatsuya Higashi
- Faculty of Pharmaceutical Sciences, Tokyo University of Science
| | - Masaru Kato
- Graduate School of Pharmaceutical Sciences, The University of Tokyo
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12
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Effect of Nanoparticle Surface on the HPLC Elution Profile of Liposomal Nanoparticles. Pharm Res 2016; 33:1440-6. [DOI: 10.1007/s11095-016-1886-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 02/16/2016] [Indexed: 11/26/2022]
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13
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KATO M. Simultaneous Analytical and Purification Methods for Nanoparticles and Small Molecules Using a Silica Monolith. BUNSEKI KAGAKU 2016. [DOI: 10.2116/bunsekikagaku.65.703] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Masaru KATO
- Graduate School of Pharmaceutical Sciences, The University of Tokyo
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14
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Contado C. Nanomaterials in consumer products: a challenging analytical problem. Front Chem 2015; 3:48. [PMID: 26301216 PMCID: PMC4527077 DOI: 10.3389/fchem.2015.00048] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Accepted: 07/13/2015] [Indexed: 01/10/2023] Open
Abstract
Many products used in everyday life are made with the assistance of nanotechnologies. Cosmetic, pharmaceuticals, sunscreen, powdered food are only few examples of end products containing nano-sized particles (NPs), generally added to improve the product quality. To evaluate correctly benefits vs. risks of engineered nanomaterials and consequently to legislate in favor of consumer's protection, it is necessary to know the hazards connected with the exposure levels. This information implies transversal studies and a number of different competences. On analytical point of view the identification, quantification and characterization of NPs in food matrices and in cosmetic or personal care products pose significant challenges, because NPs are usually present at low concentration levels and the matrices, in which they are dispersed, are complexes and often incompatible with analytical instruments that would be required for their detection and characterization. This paper focused on some analytical techniques suitable for the detection, characterization and quantification of NPs in food and cosmetics products, reports their recent application in characterizing specific metal and metal-oxide NPs in these two important industrial and market sectors. The need of a characterization of the NPs as much as possible complete, matching complementary information about different metrics, possible achieved through validate procedures, is what clearly emerges from this research. More work should be done to produce standardized materials and to set-up methodologies to determine number-based size distributions and to get quantitative date about the NPs in such a complex matrices.
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Affiliation(s)
- Catia Contado
- Department of Chemical and Pharmaceutical Sciences, University of FerraraFerrara, Italy
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15
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Itoh N, Santa T, Kato M. Rapid and mild purification method for nanoparticles from a dispersed solution using a monolithic silica disk. J Chromatogr A 2015; 1404:141-5. [DOI: 10.1016/j.chroma.2015.05.047] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 05/20/2015] [Indexed: 01/01/2023]
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16
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Itoh N, Santa T, Kato M. Rapid evaluation of the quantity of drugs encapsulated within nanoparticles by high-performance liquid chromatography in a monolithic silica column. Anal Bioanal Chem 2015; 407:6429-34. [PMID: 26072211 DOI: 10.1007/s00216-015-8805-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 05/06/2015] [Accepted: 05/26/2015] [Indexed: 11/26/2022]
Abstract
Drug-containing nanoparticles, the foundation of nanomedicine, provide promise for the safe and effective delivery of drugs to their targets. In this study, we developed a simple method to determine the relative quantities of nanoparticle-encapsulated drugs by HPLC using a commercially available monolithic silica column. Amphotericin B- and irinotecan-containing nanoparticles produced nearly simultaneous elution peaks (~7 min), suggesting that elution was largely driven by hydrodynamic effects and was relatively unaffected by differences in the encapsulated drug. A good correlation was observed between the intensity of the nanoparticle peak and the relative quantity of encapsulated drug. We used our method to characterize the effects of drug quantity and nanoparticle size on drug encapsulation rates within the nanoparticles. Encapsulation increased with increasing quantities of the drug in the preparation solution. This effect was greater for irinotecan than for amphotericin B. Although absolute encapsulation also increased with increasing nanoparticle size, encapsulation efficiency decreased. Thus, the monolith column is suitable for evaluating nanomedicine quality and may be used to evaluate many kinds of nanomaterials. Graphical Abstract Evaluation method of quantity of drug encapsulated within nanoparticles was developed. The method can be applicable for a rapid quality assurance of nanomedicine.
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Affiliation(s)
- Naoki Itoh
- Graduate School of Pharmaceutical Sciences and GPLLI Program, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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17
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Kato M, Sasaki M, Ueyama Y, Koga A, Sano A, Higashi T, Santa T. Comparison of the migration behavior of nanoparticles based on polyethylene glycol and silica using micellar electrokinetic chromatography. J Sep Sci 2015; 38:468-74. [DOI: 10.1002/jssc.201401086] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 11/12/2014] [Accepted: 11/12/2014] [Indexed: 01/14/2023]
Affiliation(s)
- Masaru Kato
- Graduate School of Pharmaceutical Sciences and GPLLI Program; The University of Tokyo; Tokyo Japan
| | - Minoru Sasaki
- Graduate School of Pharmaceutical Sciences and GPLLI Program; The University of Tokyo; Tokyo Japan
| | - Yukari Ueyama
- Faculty of Pharmaceutical Sciences; Tokyo University of Science; Noda-shi Chiba Japan
| | - Ayaka Koga
- Faculty of Pharmaceutical Sciences; Tokyo University of Science; Noda-shi Chiba Japan
| | - Akira Sano
- Faculty of Pharmaceutical Sciences; Tokyo University of Science; Noda-shi Chiba Japan
| | - Tatsuya Higashi
- Faculty of Pharmaceutical Sciences; Tokyo University of Science; Noda-shi Chiba Japan
| | - Tomofumi Santa
- Graduate School of Pharmaceutical Sciences and GPLLI Program; The University of Tokyo; Tokyo Japan
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18
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Amamoto T, Hirata T, Takahashi H, Kamiya M, Urano Y, Santa T, Kato M. Spatiotemporal activation of molecules within cells using silica nanoparticles responsive to blue-green light. J Mater Chem B 2015; 3:7427-7433. [DOI: 10.1039/c5tb01165e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Vehicle-nanoparticles that release cargo molecule at the cytoplasm of live cells by blue-green light has been developed.
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Affiliation(s)
- Takaki Amamoto
- Graduate School of Pharmaceutical Sciences
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Tomoya Hirata
- Graduate School of Pharmaceutical Sciences
- The University of Tokyo
- Bunkyo-ku
- Japan
| | | | - Mako Kamiya
- Graduate School of Medicine
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Yasuteru Urano
- Graduate School of Pharmaceutical Sciences
- The University of Tokyo
- Bunkyo-ku
- Japan
- Graduate School of Medicine
| | - Tomofumi Santa
- Graduate School of Pharmaceutical Sciences
- The University of Tokyo
- Bunkyo-ku
- Japan
| | - Masaru Kato
- Graduate School of Pharmaceutical Sciences
- The University of Tokyo
- Bunkyo-ku
- Japan
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