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Kane GI, Brassil ML, Diaz-Infante MB, Atukorale PU. Nanocarrier design for pathogen-inspired innate immune agonist delivery. Trends Immunol 2024; 45:678-692. [PMID: 39191543 DOI: 10.1016/j.it.2024.07.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2024] [Revised: 07/23/2024] [Accepted: 07/25/2024] [Indexed: 08/29/2024]
Abstract
In complex diseases such as cancer, modulating cytokine signatures of disease using innate immune agonists holds therapeutic promise. Novel multi-agonist treatments offer tunable control of the immune system because they are uniquely pathogen inspired, eliciting robust antitumor responses by promoting synergistic cytokine responses. However, the chief strategic hurdle is ensuring multi-agonist delivery to the same target cells, highlighting the importance of using nanomaterial-based carriers. Here, we place nanocarriers in center stage and review the delivery hurdles related to the varying extra- and intracellular localizations of innate immune receptors. We discuss a range of nanomaterials used for multi-agonist delivery, highlighting their respective benefits and drawbacks. Our overarching stance is that rational nanocarrier design is crucial for developing pathogen-inspired multi-agonist immunotherapies.
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Affiliation(s)
- Griffin I Kane
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst, MA, USA; UMass Cancer Center, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Meghan L Brassil
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst, MA, USA; UMass Cancer Center, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Miranda B Diaz-Infante
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst, MA, USA; UMass Cancer Center, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Prabhani U Atukorale
- Department of Biomedical Engineering, University of Massachusetts Amherst, Amherst, MA, USA; Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA, USA; Division of Innate Immunity, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA; UMass Cancer Center, University of Massachusetts Chan Medical School, Worcester, MA, USA.
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2
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Klbik I, Čechová K, Milovská S, Švajdlenková H, Maťko I, Lakota J, Šauša O. Polyethylene glycol 400 enables plunge-freezing cryopreservation of human keratinocytes. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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3
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Jiang J, Han F, Cai K, Shen Q, Yang C, Gao A, Yu J, Fan X, Hao Y, Wang Z, Liu W, Shi Y, Liu Q. Synthesis and biological evaluation of cholic acid-conjugated oxaliplatin as a new prodrug for liver cancer. J Inorg Biochem 2023; 243:112200. [PMID: 36989945 DOI: 10.1016/j.jinorgbio.2023.112200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 03/14/2023] [Accepted: 03/20/2023] [Indexed: 03/29/2023]
Abstract
A cholic acid-conjugated oxaliplatin, LLC-202, is developed as a novel prodrug for liver cancer. The conjugate is obtained by using 3-NH2-cyclobutane-1,1-dicarboxylate as a linker between the oxaliplatin analogue and cholic acid moiety and cholic acid is strongly bonded to the linker via an amide bond. Pharmacokinetic experiment shows that LLC-202 is mainly distributed and accumulated in the liver after intravenous administration to Sprague-Dawley rats, revealing the liver-targeting profile. Compared to oxaliplatin, LLC-202 is more easily taken up by human liver cancer cells than normal human liver cells. LLC-202 exhibits higher in vitro anticancer activity and higher efficacy comparable to oxaliplatin in treating primary hepatocellular carcinoma in C57BL/6 mice. It can significantly prolong the survival time of tumor-bearing mice by inducing apoptosis and inhibiting proliferation of cancer cells. In addition, LLC-202 shows less cytotoxicity toward normal human liver cells than oxaliplatin. Its acute toxicity in healthy Kunming (KM) mice after i.v. administration is comparable to oxaliplatin. Histopathological examination reveals that the main toxicity of LLC-202 in mice is the depression of bone marrow hematopoietic cells. The results suggest that LLC-202 has great potential for further development as a new prodrug specific for liver cancer.
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4
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Shang LY, Zhou MH, Cao SY, Zhang M, Wang PJ, Zhang S, Meng XX, Yang QM, Gao XL. Effect of polyethylene glycol 400 on the pharmacokinetics and tissue distribution of baicalin by intravenous injection based on the enzyme activity of UGT1A8/1A9. Eur J Pharm Sci 2023; 180:106328. [PMID: 36379359 DOI: 10.1016/j.ejps.2022.106328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 10/11/2022] [Accepted: 11/09/2022] [Indexed: 11/13/2022]
Abstract
Baicalin (BG) is a bioactive flavonoid extracted from the dried root of the medicinal plant, Scutellaria radix (SR) (dicotyledonous family, Labiatae), and has several biological activities. Polyethylene glycol 400 (PEG400) has been used as a suitable solvent for several traditional Chinese medicines (TCM) and is often used as an excipient for the compound preparation of SR. However, the drug-excipient interactions between BG and PEG400 are still unknown. Herein, we evaluated the effect of a single intravenous PEG400 administration on the BG levels of rats using pharmacokinetic and tissue distribution studies. A liver microsome and recombinant enzyme incubation system were used to further confirm the interaction mechanism between PEG400 and UDP-glucuronosyltransferases (UGTs) (UGT1A8 and UGT1A9). The pharmacokinetic study demonstrated that following the co-intravenous administration of PEG400 and BG, the total clearance (CLz) of BG in the rat plasma decreased by 101.60% (p < 0.05), whereas the area under the plasma concentration-time curve (AUC)0-t and AUC0-inf increased by 144.59% (p < 0.05) and 140.05% (p < 0.05), respectively. Additionally, the tissue distribution study showed that the concentration of BG and baicalein-6-O-β-D-glucuronide (B6G) in the tissues increased, whereas baicalein (B) in the tissues decreased, and the total amount of BG and its metabolites in tissues altered following the intravenous administration of PEG400. We further found that PEG400 induced the UGT1A8 and UGT1A9 enzyme activities by affecting the maximum enzymatic velocity (Vmax) and Michaelis-Menten constant (Km) values of UGT1A8 and UGT1A9. In conclusion, our results demonstrated that PEG400 interaction with UGTs altered the pharmacokinetic behaviors and tissue distribution characteristics of BG and its metabolites in rats.
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Affiliation(s)
- Le-Yuan Shang
- State Key Laboratory of Functions and Applications of Medicinal Plants and School of Pharmacy, Guizhou Medical University, Guiyang 550025, China; Microbiology and Biochemical Pharmaceutical Engineering Research Center of Guizhou Provincial Department of Education, Guizhou Medical University, Guiyang 550004, China; Guizhou Medical University Experimental Animal Center, Guizhou Medical University, Guiyang 550025, China
| | - Ming-Hao Zhou
- Inspection Center of Guizhou Drug Administration, Guiyang 550025, China
| | - Si-Yuan Cao
- State Key Laboratory of Functions and Applications of Medicinal Plants and School of Pharmacy, Guizhou Medical University, Guiyang 550025, China; Microbiology and Biochemical Pharmaceutical Engineering Research Center of Guizhou Provincial Department of Education, Guizhou Medical University, Guiyang 550004, China; Guizhou Medical University Experimental Animal Center, Guizhou Medical University, Guiyang 550025, China
| | - Min Zhang
- State Key Laboratory of Functions and Applications of Medicinal Plants and School of Pharmacy, Guizhou Medical University, Guiyang 550025, China; Microbiology and Biochemical Pharmaceutical Engineering Research Center of Guizhou Provincial Department of Education, Guizhou Medical University, Guiyang 550004, China; Guizhou Medical University Experimental Animal Center, Guizhou Medical University, Guiyang 550025, China
| | - Peng-Jiao Wang
- State Key Laboratory of Functions and Applications of Medicinal Plants and School of Pharmacy, Guizhou Medical University, Guiyang 550025, China; Microbiology and Biochemical Pharmaceutical Engineering Research Center of Guizhou Provincial Department of Education, Guizhou Medical University, Guiyang 550004, China; Guizhou Medical University Experimental Animal Center, Guizhou Medical University, Guiyang 550025, China
| | - Shuo Zhang
- State Key Laboratory of Functions and Applications of Medicinal Plants and School of Pharmacy, Guizhou Medical University, Guiyang 550025, China; Microbiology and Biochemical Pharmaceutical Engineering Research Center of Guizhou Provincial Department of Education, Guizhou Medical University, Guiyang 550004, China; Guizhou Medical University Experimental Animal Center, Guizhou Medical University, Guiyang 550025, China
| | - Xiao-Xia Meng
- State Key Laboratory of Functions and Applications of Medicinal Plants and School of Pharmacy, Guizhou Medical University, Guiyang 550025, China; Microbiology and Biochemical Pharmaceutical Engineering Research Center of Guizhou Provincial Department of Education, Guizhou Medical University, Guiyang 550004, China; Guizhou Medical University Experimental Animal Center, Guizhou Medical University, Guiyang 550025, China
| | - Qi-Mei Yang
- State Key Laboratory of Functions and Applications of Medicinal Plants and School of Pharmacy, Guizhou Medical University, Guiyang 550025, China; Microbiology and Biochemical Pharmaceutical Engineering Research Center of Guizhou Provincial Department of Education, Guizhou Medical University, Guiyang 550004, China; Guizhou Medical University Experimental Animal Center, Guizhou Medical University, Guiyang 550025, China
| | - Xiu-Li Gao
- State Key Laboratory of Functions and Applications of Medicinal Plants and School of Pharmacy, Guizhou Medical University, Guiyang 550025, China; Microbiology and Biochemical Pharmaceutical Engineering Research Center of Guizhou Provincial Department of Education, Guizhou Medical University, Guiyang 550004, China; Guizhou Medical University Experimental Animal Center, Guizhou Medical University, Guiyang 550025, China.
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5
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Yang X, Lu W, Wang M, De La Cruz LK, Tan C, Wang B. Activated charcoal dispersion of carbon monoxide prodrugs for oral delivery of CO in a pill. Int J Pharm 2022; 618:121650. [PMID: 35276229 PMCID: PMC9060424 DOI: 10.1016/j.ijpharm.2022.121650] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 03/01/2022] [Accepted: 03/05/2022] [Indexed: 12/12/2022]
Abstract
A novel orally bioavailable solid formulation to deliver a gaseous signaling molecule, carbon monoxide (CO), was developed by adsorbing oxalyl saccharin, a newly developed organic CO prodrug, in activated charcoal (AC). The resulting solid dispersion formulation addresses key developability issues of this CO prodrug. By taking advantage of the large surface area of AC, the paradoxical problem of low water solubility of the prodrug and the requirement of hydrolysis to release CO is resolved, and the need for an organic cosolvent is completely circumvented. The AC formulation also mitigates the adverse effect of low pH on the CO release yield, allowing steady CO release in simulated gastric and intestine fluids. This formulation allows encapsulation in normal and enteric-coated gel capsules, which enables controllable CO delivery to the upper or lower GI system. It also features an advantage of trapping CO prodrug and CO release product in the AC, therefore lowering systemic absorption of these chemicals. Through in-vivo pharmacokinetic studies in mice, the AC formulation showed better efficiency of delivering CO through oral administration compared to the prodrug dosed with an organic cosolvent. The AC formulation has also been applied to address similar developability issues of another cheletropic reaction-based CO prodrug. We envision the wide applicability of this formulation in facilitating the future development of CO-based therapeutics.
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Affiliation(s)
- Xiaoxiao Yang
- Department of Chemistry and Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, GA 30303, USA
| | - Wen Lu
- Department of Chemistry and Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, GA 30303, USA
| | - Minjia Wang
- Department of Pharmaceutics and Drug Delivery, University of Mississippi, University, MS 38677, USA
| | - Ladie Kimberly De La Cruz
- Department of Chemistry and Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, GA 30303, USA
| | - Chalet Tan
- Department of Pharmaceutics and Drug Delivery, University of Mississippi, University, MS 38677, USA.
| | - Binghe Wang
- Department of Chemistry and Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, GA 30303, USA.
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Revisiting Flubendazole Through Nanocrystal Technology: Statistical Design, Characterization and Its Potential Inhibitory Effect on Xenografted Lung Tumor Progression in Mice. J CLUST SCI 2022. [DOI: 10.1007/s10876-022-02220-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Shi D, Beasock D, Fessler A, Szebeni J, Ljubimova JY, Afonin KA, Dobrovolskaia MA. To PEGylate or not to PEGylate: Immunological properties of nanomedicine's most popular component, polyethylene glycol and its alternatives. Adv Drug Deliv Rev 2022; 180:114079. [PMID: 34902516 PMCID: PMC8899923 DOI: 10.1016/j.addr.2021.114079] [Citation(s) in RCA: 149] [Impact Index Per Article: 74.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 12/01/2021] [Accepted: 12/03/2021] [Indexed: 01/03/2023]
Abstract
Polyethylene glycol or PEG has a long history of use in medicine. Many conventional formulations utilize PEG as either an active ingredient or an excipient. PEG found its use in biotechnology therapeutics as a tool to slow down drug clearance and shield protein therapeutics from undesirable immunogenicity. Nanotechnology field applies PEG to create stealth drug carriers with prolonged circulation time and decreased recognition and clearance by the mononuclear phagocyte system (MPS). Most nanomedicines approved for clinical use and experimental nanotherapeutics contain PEG. Among the most recent successful examples are two mRNA-based COVID-19 vaccines that are delivered by PEGylated lipid nanoparticles. The breadth of PEG use in a wide variety of over the counter (OTC) medications as well as in drug products and vaccines stimulated research which uncovered that PEG is not as immunologically inert as it was initially expected. Herein, we review the current understanding of PEG's immunological properties and discuss them in the context of synthesis, biodistribution, safety, efficacy, and characterization of PEGylated nanomedicines. We also review the current knowledge about immunological compatibility of other polymers that are being actively investigated as PEG alternatives.
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Key Words
- Poly(ethylene)glycol, PEG, immunogenicity, immunology, nanomedicine, toxicity, anti-PEG antibodies, hypersensitivity, synthesis, drug delivery, biotherapeutics
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Affiliation(s)
- Da Shi
- Nanotechnology Characterization Lab, Frederick National Laboratory for Cancer Research Sponsored by the National Cancer Institute, Frederick, MD, USA
| | - Damian Beasock
- University of North Carolina Charlotte, Charlotte, NC, USA
| | - Adam Fessler
- University of North Carolina Charlotte, Charlotte, NC, USA
| | - Janos Szebeni
- Nanomedicine Research and Education Center, Institute of Translational Medicine, Semmelweis University, Budapest, Hungary; SeroScience LCC, Budapest, Hungary; Department of Nanobiotechnology and Regenerative Medicine, Faculty of Health, Miskolc University, Miskolc, Hungary
| | | | | | - Marina A Dobrovolskaia
- Nanotechnology Characterization Lab, Frederick National Laboratory for Cancer Research Sponsored by the National Cancer Institute, Frederick, MD, USA.
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de Azevedo Queiroz ÍO, Machado T, Alves CC, Brito VGB, de Vasconcelos BC, Gomes-Filho JE, Ervolino E, de Oliveira SHP, Duarte MAH. Biological and antimicrobial properties of the association Ambroxol and a water-soluble viscous liquid as a vehicle for a tricalcium silicate-based sealer. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2021; 32:140. [PMID: 34817700 PMCID: PMC8613135 DOI: 10.1007/s10856-021-06604-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 09/05/2021] [Indexed: 06/13/2023]
Abstract
This study aimed to investigate the antimicrobial and biological properties of Ambroxol associated with glycerin (GLI), propylene glycol (PG), and polyethylene glycol (PEG) as a possible vehicle for an experimental tricalcium silicate sealer, with the intention of developing a new biomaterial. Mouse undifferentiated dental pulp cells (OD-21) were cultured, and the effects of different association on cell proliferation and inflammatory cytokine production were investigated. Antimicrobial adhesion of Enterococcus faecalis to setting sealers at 2 h was evaluated. Polyethylene tubes containing experimental sealers and empty tubes were implanted into dorsal connective tissues of 12 male 3- to 4-months-old Wistar rats (250-280 g). After 7 and 30 days, the tubes were removed and processed for histological and immunohistochemical analyses. ANOVA followed by Bonferroni correction and ANOVA followed by Tukey test was used for parametric data and Kruskal-Wallis followed by Dunn for nonparametric (p < 0.05). Cell proliferation was dose-dependent, since all association were cytotoxic at higher concentrations; however, Ambroxol-PEG showed significantly higher cytotoxicity than other association (p < 0.05). In addition, irrespective of the association, no cytokine production was observed in vitro. Ambroxol-GLI reduced bacterial viability, whereas Ambroxol-PEG increased (p < 0.05). Histological examination showed no significant difference in the inflammatory response (p > 0.05) and mineralization ability in all association. Additionally, IL-1β and TNF-α were upregulated on Ambroxol-PEG in relation to Control at 07 days (p < 0.05). Ambroxol-GLI was the best vehicle for experimental tricalcium silicate sealer, as it promoted an increase in antimicrobial activity without altering the inflammatory response or mineralization ability.
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Affiliation(s)
- Índia Olinta de Azevedo Queiroz
- Department of Dentistry, Endodontics and Dental Materials, University of São Paulo (USP), Bauru School of Dentistry, Alameda Octávio Pinheiro Brisolla, Bauru, SP, 9-75, Brazil.
| | - Thiago Machado
- Department of Oral and Maxillofacial Surgery and Integrated Clinic, School of Dentistry, Araçatuba, São Paulo State University (Unesp), Araçatuba, SP, 1193, Brazil
| | - Camila Carneiro Alves
- Department of Endodontics, School of Dentistry, Araçatuba, São Paulo State University (Unesp), Rua José Bonifácio, Araçatuba, SP, 1193, Brazil
| | - Victor Gustavo Balera Brito
- Department of Basic Science, School of Dentistry, Araçatuba, São Paulo State University (Unesp), Rua José Bonifácio, Araçatuba, SP, 1193, Brazil
| | - Bruno Carvalho de Vasconcelos
- Department of Dentistry, School of Dentistry of Sobral, Federal University of Ceará (UFC), Rua Coronel Estanislau Frota, Sobral, CE, 563, Brazil
| | - João Eduardo Gomes-Filho
- Department of Endodontics, School of Dentistry, Araçatuba, São Paulo State University (Unesp), Rua José Bonifácio, Araçatuba, SP, 1193, Brazil
| | - Edilson Ervolino
- Department of Basic Science, School of Dentistry, Araçatuba, São Paulo State University (Unesp), Rua José Bonifácio, Araçatuba, SP, 1193, Brazil
| | - Sandra Helena Penha de Oliveira
- Department of Basic Science, School of Dentistry, Araçatuba, São Paulo State University (Unesp), Rua José Bonifácio, Araçatuba, SP, 1193, Brazil
| | - Marco Antonio Hungaro Duarte
- Department of Dentistry, Endodontics and Dental Materials, University of São Paulo (USP), Bauru School of Dentistry, Alameda Octávio Pinheiro Brisolla, Bauru, SP, 9-75, Brazil
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Rostami I. Empowering the Emission of Upconversion Nanoparticles for Precise Subcellular Imaging. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1541. [PMID: 34207983 PMCID: PMC8230588 DOI: 10.3390/nano11061541] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/25/2021] [Accepted: 05/29/2021] [Indexed: 11/16/2022]
Abstract
Upconversion nanoparticles (UCNPs) are a class of inorganic fluorophores that follow the anti-Stokes mechanism, to which the wavelength of emission is shorter than absorption. This unique optical behavior generates relatively long-lived intermediate energy levels of lanthanides that stabilize the excitation state in the fluorescence process. Longer-wavelength light sources, e.g., near-infrared (NIR), penetrate deeper into biological materials such as tissue and cells that provide a larger working space for cell biology applications and imaging, whereby UCNPs have recently gained increasing interest in medicine. In this report, the emission intensity of a gadolinium-based UCNP was screened by changing the concentrations of the constituents. The optimized condition was utilized as a luminescent nanoprobe for targeting the mitochondria as a distinguished subcellular organelle within differentiated neuroblastoma cells. The main goal of this study is to illustrate the targeting process within the cells in a native state using modified UCNPs. Confocal microscopy on the cells treated with the functionalized UCNPs indicated a selective accumulation of UCNPs after immunolabeling. To tackle the insolubility of as-synthesized particles in water-based media, the optimized UCNPs were surface-coated with polyamidoamine (PAMAM) dendrimers that due to peripheral amino groups are suitable for functionalizing with peptides and antibodies. Ultimately, we concluded that UCNPs are potentially versatile and ideal tools for NIR bioimaging and capable of making adequate contrast against biomaterials to be detectable in electron microscopy (EM) imaging.
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Affiliation(s)
- Iman Rostami
- Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
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10
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Chen J, Spiering G, Mosquera-Giraldo L, Moore RB, Edgar KJ. Regioselective Bromination of the Dextran Nonreducing End Creates a Pathway to Dextran-Based Block Copolymers. Biomacromolecules 2020; 21:1729-1738. [DOI: 10.1021/acs.biomac.9b01668] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Laura Mosquera-Giraldo
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907, United States
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Kleynhans J, Elgar D, Ebenhan T, Zeevaart JR, Kotzé A, Grobler A. A toxicity profile of the Pheroid® technology in rodents. Toxicol Rep 2019; 6:940-950. [PMID: 31673495 PMCID: PMC6816226 DOI: 10.1016/j.toxrep.2019.08.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 07/11/2019] [Accepted: 08/20/2019] [Indexed: 12/21/2022] Open
Abstract
Acute administration of 2000 mg/kg of the Pheroid® delivery system was tolerated upon intravenous administration in BALB/c mice and Sprague-Dawley rats. Oral administration was tolerated in both acute toxicity evaluation (14-days post single dose administration) and during chronic administration (90-days dosing). No mutagenicity was present during the Ames assay. A statistically significant increase in creatinine levels in the sub-chronic female treatment group was observed, however no treatment related pathology was identified during histopathology. This evaluation did not identify any risk factors present for toxicity during oral or intravenous administration of the tested formulations during acute or repeated dosing.
The Pheroid® drug delivery system is now on the threshold of progressing into human clinical trials for various patented pharmaceutical applications and a systematic investigation of its toxicological properties in vitro and in vivo is thus a priority. Colloidal dispersions (nano- and microemulsions) demonstrate the ability to be adapted to accommodate either lipophilic, hydrophilic or amphiphilic drug molecules. The colloidal dispersions investigated during this evaluation has a general size of 200 nm - 2 μm, a zeta-potential of -25 mV and the main ingredient was ethyl esters of essential fatty acids. The Ames mutagenicity assay was performed on selected Salmonella thyphimurium strains TA98, TA100 and TA102. The Ames assay included S9 metabolic activation and no mutagenicity was present during the assay. The effect of acute and subchronic administration on a biological system was investigated in two species of rodent (BALB/c mice and Sprague-Dawley rats). Observations focused on the physical condition, blood biochemical analysis and the haematological profiles. Gross necropsy was performed on all the test animals. Organ weights followed by histopathology of selected organ tissues were recorded. During the acute evaluation animals showed tolerance of the maximum prescribed dose of 2000 mg/kg (according to OECD guidelines) in two rodent species after intravenous administration (absolute bioavaibility). The oral formulation was tolerated without incidents in both acute and subchronic studies. Although valuable baseline safety data was obtained regarding the Pheroid® system, future studies with the entrapped active pharmaceutical ingredients is necessary to provide a definitive safety profile.
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Affiliation(s)
- Janke Kleynhans
- DST/NWU Preclinical Drug Development Platform, North-West University, Potchefstroom, 2520, South Africa
| | - Dale Elgar
- Faculty of Health Sciences, North-West University, Potchefstroom, 2520, South Africa
| | - Thomas Ebenhan
- Nuclear Medicine, University of Pretoria, Pretoria, 0001, South Africa
| | - Jan Rijn Zeevaart
- DST/NWU Preclinical Drug Development Platform, North-West University, Potchefstroom, 2520, South Africa.,Radiochemistry, The South African Nuclear Energy Corporation (Necsa), P.O. Box, 482, Pretoria, 0001, South Africa
| | - Awie Kotzé
- Faculty of Health Sciences, North-West University, Potchefstroom, 2520, South Africa
| | - Anne Grobler
- DST/NWU Preclinical Drug Development Platform, North-West University, Potchefstroom, 2520, South Africa
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12
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Gu YZ, Chu X, Houle R, Vlasakova K, Koeplinger KA, Bourgeois I, Palyada K, Anderson KD, Brynczka C, Bhatt B, Chen F, Smith R, Amin R, Glaab WE, Lebron J, Cox K, Sistare FD. Polyethlyene Glycol 200 can Protect Rats against Drug-Induced Kidney Toxicity through Inhibition of the Renal Organic Anion Transporter 3. Toxicol Sci 2019; 172:155-166. [PMID: 31406999 DOI: 10.1093/toxsci/kfz186] [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: 06/06/2019] [Revised: 07/18/2019] [Accepted: 07/19/2019] [Indexed: 01/15/2023] Open
Abstract
MK-7680, a cyclic nucleotide prodrug, caused significant kidney tubule injury in female rats when administered orally at 1000 mg/kg/day for 2 weeks using 10% Polysorbate 80 as vehicle. However, kidney injury was absent when MK-7680 was administered at the same dose regimen using 100% Polyethylene Glycol 200 (PEG 200) as the vehicle. Subsequent investigations revealed that MK-7680 triphosphate concentrations in kidney were much lower in rats treated with MK-7680 using PEG 200 compared to 10% Polysorbate 80 vehicle while plasma exposures of MK-7680 prodrug were similar. In vitro studies demonstrated that PEG 200 is an inhibitor of human renal uptake transporter organic anion transporter 3 (OAT3), of which MK-7680 is a substrate. Furthermore, PEG 200 and PEG 400 were found to interfere in vitro with human renal transporters OAT3, organic cation transporter (OCT) 2, multidrug resistance-associated protein (MRP) 2 and 4, and multidrug and toxin extrusion protein (MATE) 1 and 2K, but not OAT1. These results support a conclusion that PEG 200 may prevent MK-7680-induced kidney injury by inhibiting its active uptake into proximal tubular cells by OAT3. Caution should be exercised therefore when using PEGs as vehicles for toxicity assessment for compounds that are substrates of renal transporters.
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Affiliation(s)
- Yi-Zhong Gu
- Safety Assessment and Laboratory Animal Resources, Riom, France
| | - Xiaoyan Chu
- Pharmacokinetics, Pharmacodynamics and Metabolism, Riom, France
| | - Robert Houle
- Pharmacokinetics, Pharmacodynamics and Metabolism, Riom, France
| | | | | | - Isabelle Bourgeois
- Safety Assessment and Laboratory Animal Resources, Riom, France.,Merck & Co., Inc., West Point, PA 19486, USA; MSD, Riom, France
| | - Kiran Palyada
- Safety Assessment and Laboratory Animal Resources, Riom, France
| | | | | | - Bhavana Bhatt
- Safety Assessment and Laboratory Animal Resources, Riom, France
| | - Feifei Chen
- Safety Assessment and Laboratory Animal Resources, Riom, France
| | - Roger Smith
- Safety Assessment and Laboratory Animal Resources, Riom, France
| | - Rupesh Amin
- Safety Assessment and Laboratory Animal Resources, Riom, France
| | - Warren E Glaab
- Safety Assessment and Laboratory Animal Resources, Riom, France
| | - Jose Lebron
- Safety Assessment and Laboratory Animal Resources, Riom, France
| | - Kathleen Cox
- Pharmacokinetics, Pharmacodynamics and Metabolism, Riom, France
| | - Frank D Sistare
- Safety Assessment and Laboratory Animal Resources, Riom, France
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Chen YS, Chiu YH, Li YS, Lin EY, Hsieh DK, Lee CH, Huang MH, Chuang HM, Lin SZ, Harn HJ, Chiou TW. Integration of PEG 400 into a self-nanoemulsifying drug delivery system improves drug loading capacity and nasal mucosa permeability and prolongs the survival of rats with malignant brain tumors. Int J Nanomedicine 2019; 14:3601-3613. [PMID: 31190814 PMCID: PMC6530554 DOI: 10.2147/ijn.s193617] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 03/21/2019] [Indexed: 12/19/2022] Open
Abstract
Introduction: Kolliphor® EL (K-EL) is among the most useful surfactants in the preparation of emulsions. However, it is associated with low hydrophobic drug loading in the resulting emulsified formulation. Methods: In this study, a formulation for intranasal administration of butylidenephthalide (Bdph), a candidate drug against glioblastoma (GBM), was prepared. Physical characteristics of the formulation such as particle size, zeta potential, conductivity, and viscosity were assessed, as well as its cytotoxicity and permeability, in order to optimize the formulation and improve its drug loading capacity. Results: The optimized formulation involved the integration of polyethylene glycol 400 (PEG 400) in K-EL to encapsulate Bdph dissolved in dimethyl sulfoxide (DMSO), and it exhibited higher drug loading capacity and drug solubility in water than the old formulation, which did not contain PEG 400. Incorporation of PEG 400 as a co-surfactant increased Bdph loading capacity to up to 50% (v/v), even in formulations using Kolliphor® HS 15 (K-HS15) as a surfactant, which is less compatible with Bdph than K-EL. The optimized Bdph formulation presented 5- and 2.5-fold higher permeability and cytotoxicity, respectively, in human GBM than stock Bdph. This could be attributed to the high drug loading capacity and the high polarity index due to DMSO, which increases the compatibility between the drug and the cell. Rats bearing a brain glioma treated with 160 mg/kg intranasal emulsified Bdph had a mean survival of 37 days, which is the same survival time achieved by treatment with 320 mg/kg stock Bdph. This implies that the optimized emulsified formulation required only half the Bdph dose to achieve an efficacy similar to that of stock Bdph in the treatment of animals with malignant brain tumor.
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Affiliation(s)
- Yu-Shuan Chen
- Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan, Republic of China.,Department of Medical Research, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan, Republic of China.,Department of Life Science and Graduate Institute of Biotechnology, National Dong Hwa University, Hualien, Taiwan, Republic of China
| | - Yu-Han Chiu
- Department of Life Science and Graduate Institute of Biotechnology, National Dong Hwa University, Hualien, Taiwan, Republic of China
| | - Yuan-Sheng Li
- Department of Life Science and Graduate Institute of Biotechnology, National Dong Hwa University, Hualien, Taiwan, Republic of China
| | - En-Yi Lin
- Department of Life Science and Graduate Institute of Biotechnology, National Dong Hwa University, Hualien, Taiwan, Republic of China.,Department of Chemistry, National Dong Hwa University, Hualien, Taiwan, Republic of China
| | - Dean-Kuo Hsieh
- Department and Graduate Institute of Applied Chemistry, Chaoyang University of Technology, Taichung, Taiwan, Republic of China
| | - Chia-Hung Lee
- Department of Life Science and Graduate Institute of Biotechnology, National Dong Hwa University, Hualien, Taiwan, Republic of China
| | - Mao-Hsuan Huang
- Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan, Republic of China
| | - Hong-Meng Chuang
- Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan, Republic of China
| | - Shinn-Zong Lin
- Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan, Republic of China.,Department of Neurosurgery, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan, Republic of China
| | - Horng-Jyh Harn
- Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan, Republic of China.,Department of Pathology, Hualien Tzu Chi Hospital, Tzu Chi University, Hualien, Taiwan, Republic of China
| | - Tzyy-Wen Chiou
- Department of Life Science and Graduate Institute of Biotechnology, National Dong Hwa University, Hualien, Taiwan, Republic of China
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14
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Exploring the role of polymeric conjugates toward anti-cancer drug delivery: Current trends and future projections. Int J Pharm 2018; 548:500-514. [DOI: 10.1016/j.ijpharm.2018.06.060] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 06/27/2018] [Accepted: 06/27/2018] [Indexed: 12/13/2022]
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15
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Edwards-Gayle CJC, Hamley IW. Self-assembly of bioactive peptides, peptide conjugates, and peptide mimetic materials. Org Biomol Chem 2018; 15:5867-5876. [PMID: 28661532 DOI: 10.1039/c7ob01092c] [Citation(s) in RCA: 118] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Molecular self-assembly is a multi-disciplinary field of research, with potential chemical and biological applications. One of the main driving forces of self-assembly is molecular amphiphilicity, which can drive formation of complex and stable nanostructures. Self-assembling peptide and peptide conjugates have attracted great attention due to their biocompatibility, biodegradability and biofunctionality. Understanding assembly enables the better design of peptide amphiphiles which may form useful and functional nanostructures. This review covers self-assembly of amphiphilic peptides and peptide mimetic materials, as well as their potential applications.
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Affiliation(s)
| | - Ian W Hamley
- Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, UK.
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16
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Biocompatible Porous Polyester-Ether Hydrogel Scaffolds with Cross-Linker Mediated Biodegradation and Mechanical Properties for Tissue Augmentation. Polymers (Basel) 2018; 10:polym10020179. [PMID: 30966215 PMCID: PMC6414870 DOI: 10.3390/polym10020179] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 02/04/2018] [Accepted: 02/06/2018] [Indexed: 12/15/2022] Open
Abstract
Porous polyester-ether hydrogel scaffolds (PEHs) were fabricated using acid chloride/alcohol chemistry and a salt templating approach. The PEHs were produced from readily available and cheap commercial reagents via the reaction of hydroxyl terminated poly(ethylene glycol) (PEG) derivatives with sebacoyl, succinyl, or trimesoyl chloride to afford ester cross-links between the PEG chains. Through variation of the acid chloride cross-linkers used in the synthesis and the incorporation of a hydrophobic modifier (poly(caprolactone) (PCL)), it was possible to tune the degradation rates and mechanical properties of the resulting hydrogels. Several of the hydrogel formulations displayed exceptional mechanical properties, remaining elastic without fracture at compressive strains of up to 80%, whilst still displaying degradation over a period of weeks to months. A subcutaneous rat model was used to study the scaffolds in vivo and revealed that the PEHs were infiltrated with well vascularised tissue within two weeks and had undergone significant degradation in 16 weeks without any signs of toxicity. Histological evaluation for immune responses revealed that the PEHs incite only a minor inflammatory response that is reduced over 16 weeks with no evidence of adverse effects.
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17
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Edwards-Gayle CJC, Greco F, Hamley IW, Rambo RP, Reza M, Ruokolainen J, Skoulas D, Iatrou H. Self-Assembly of Telechelic Tyrosine End-Capped PEO Star Polymers in Aqueous Solution. Biomacromolecules 2017; 19:167-177. [DOI: 10.1021/acs.biomac.7b01420] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Francesca Greco
- School of Chemistry, Food
Biosciences and Pharmacy, University of Reading, Whiteknights, Reading RG6 6AD, U.K
| | - Ian W. Hamley
- School of Chemistry, Food
Biosciences and Pharmacy, University of Reading, Whiteknights, Reading RG6 6AD, U.K
| | - Robert P. Rambo
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, U.K
| | - Mehedi Reza
- Department of Applied Physics, Aalto School of Science, P.O. Box 15100, FI-00076 Aalto, Finland
| | - Janne Ruokolainen
- Department of Applied Physics, Aalto School of Science, P.O. Box 15100, FI-00076 Aalto, Finland
| | - Dimitrios Skoulas
- Department of Chemistry, University of Athens, Panepistimiopolis
Zografou, 157 71 Athens, Greece
| | - Hermis Iatrou
- Department of Chemistry, University of Athens, Panepistimiopolis
Zografou, 157 71 Athens, Greece
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18
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Lakkireddy HR, Bazile D. Building the design, translation and development principles of polymeric nanomedicines using the case of clinically advanced poly(lactide(glycolide))-poly(ethylene glycol) nanotechnology as a model: An industrial viewpoint. Adv Drug Deliv Rev 2016; 107:289-332. [PMID: 27593265 DOI: 10.1016/j.addr.2016.08.012] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 08/19/2016] [Accepted: 08/27/2016] [Indexed: 12/16/2022]
Abstract
The design of the first polymeric nanoparticles could be traced back to the 1970s, and has thereafter received considerable attention, as evidenced by the significant increase of the number of articles and patents in this area. This review article is an attempt to take advantage of the existing literature on the clinically tested and commercialized biodegradable PLA(G)A-PEG nanotechnology as a model to propose quality building and outline translation and development principles for polymeric nano-medicines. We built such an approach from various building blocks including material design, nano-assembly - i.e. physicochemistry of drug/nano-object association in the pharmaceutical process, and release in relevant biological environment - characterization and identification of the quality attributes related to the biopharmaceutical properties. More specifically, as envisaged in a translational approach, the reported data on PLA(G)A-PEG nanotechnology have been structured into packages to evidence the links between the structure, physicochemical properties, and the in vitro and in vivo performances of the nanoparticles. The integration of these bodies of knowledge to build the CMC (Chemistry Manufacturing and Controls) quality management strategy and finally support the translation to proof of concept in human, and anticipation of the industrialization takes into account the specific requirements and biopharmaceutical features attached to the administration route. From this approach, some gaps are identified for the industrial development of such nanotechnology-based products, and the expected improvements are discussed. The viewpoint provided in this article is expected to shed light on design, translation and pharmaceutical development to realize their full potential for future clinical applications.
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19
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Ozcelik B, Chen R, Glattauer V, Kumar N, Willcox M, Thissen H. Crosslinked Platform Coatings Incorporating Bioactive Signals for the Control of Biointerfacial Interactions. Macromol Biosci 2016; 17. [DOI: 10.1002/mabi.201600315] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 09/01/2016] [Indexed: 12/31/2022]
Affiliation(s)
- Berkay Ozcelik
- Commonwealth Scientific and Industrial Research Organisation (CSIRO); Clayton VIC 3168 Australia
| | - Renxun Chen
- School of Chemistry; University of New South Wales; Sydney NSW 2052 Australia
| | - Veronica Glattauer
- Commonwealth Scientific and Industrial Research Organisation (CSIRO); Clayton VIC 3168 Australia
| | - Naresh Kumar
- School of Chemistry; University of New South Wales; Sydney NSW 2052 Australia
| | - MarkD.P. Willcox
- School of Optometry and Vision Science; University of New South Wales; Sydney NSW 2052 Australia
| | - Helmut Thissen
- Commonwealth Scientific and Industrial Research Organisation (CSIRO); Clayton VIC 3168 Australia
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20
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Patel S, Barnett JM, Kim SJ. Retinal Toxicity of Intravitreal Polyethylene Glycol 400. J Ocul Pharmacol Ther 2016; 32:97-101. [DOI: 10.1089/jop.2015.0069] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Affiliation(s)
- Shriji Patel
- Vanderbilt Eye Institute, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Joshua M. Barnett
- Vanderbilt Eye Institute, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Stephen J. Kim
- Vanderbilt Eye Institute, Vanderbilt University Medical Center, Nashville, Tennessee
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21
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Gad SC, Spainhour CB, Shoemake C, Pallman DRS, Stricker-Krongrad A, Downing PA, Seals RE, Eagle LA, Polhamus K, Daly J. Tolerable Levels of Nonclinical Vehicles and Formulations Used in Studies by Multiple Routes in Multiple Species With Notes on Methods to Improve Utility. Int J Toxicol 2016; 35:95-178. [PMID: 26755718 DOI: 10.1177/1091581815622442] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Formulation of nonclinical evaluations is a challenge, with the fundamental need to achieve multiples of the clinical exposure complicated by differences in species and routes of administration-specific tolerances, depending on concentrations, volumes, dosing regimen, duration of each administration, and study duration. Current practice to approach these differences is based on individual experience and scattered literature with no comprehensive data source (the most notable exception being our 2006 publication on this same subject). Lack of formulation tolerance data results in excessive animal use, unplanned delays in the evaluation and development of drugs, and vehicle-dependent results. A consulting firm, a chemical company, and 4 contract research organizations conducted a rigorous data mining operation of vehicle data from studies dating from 1991 to 2015, enhancing the data from this author's 2006 publication (3 of the six 2015 contributors were also 2006 contributors). Additional data were found in the published literature. The results identified 108 single-component vehicles (and 305 combination formulations) used in more than 1,040 studies across multiple species (dog, primate, rat, mouse, rabbit, guinea pig, minipig, pig, chick embryo, and cat) by multiple routes for a wide range of study durations. The tabulated data include maximum tolerated use levels by species, route, duration of study, dose-limiting toxicity where reported, review of the available literature on each vehicle, guidance on syringe selection, volume and pH limits by route with basic guidance on nonclinical formulation development, and guidance on factors to be considered in nonclinical route selection.
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22
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Nalawade TM, Bhat K, Sogi SHP. Bactericidal activity of propylene glycol, glycerine, polyethylene glycol 400, and polyethylene glycol 1000 against selected microorganisms. J Int Soc Prev Community Dent 2015; 5:114-9. [PMID: 25992336 PMCID: PMC4415329 DOI: 10.4103/2231-0762.155736] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Aim: The aim of the present study was to evaluate the bactericidal activity of propylene glycol, glycerine, polyethylene glycol 400 (PEG 400), and polyethylene glycol 1000 (PEG 1000) against selected microorganisms in vitro. Materials and Methods: Five vehicles, namely propylene glycol, glycerine, PEG 400, PEG 1000, and combination of propylene glycol with PEG 400, were tested for their bactericidal activity. The minimum bactericidal concentration was noted against four standard strains of organisms, i.e. Streptococcus mutans American Type Culture Collection (ATCC) 25175, Streptococcus mutans ATCC 12598, Enterococcus faecalis ATCC 35550, and Escherichia coli ATCC 25922, using broth dilution assay. Successful endodontic therapy depends upon thorough disinfection of root canals. In some refractory cases, routine endodontic therapy is not sufficient, so intracanal medicaments are used for proper disinfection of canals. Intracanal medicaments are dispensed with vehicles which aid in increased diffusion through the dentinal tubules and improve their efficacy. Among the various vehicles used, glycerine is easily available, whereas others like propylene glycol and polyethylene glycol have to be procured from appropriate sources. Also, these vehicles, being viscous, aid in sustained release of the medicaments and improve their handling properties. The most commonly used intracanal medicaments like calcium hydroxide are ineffective on many microorganisms, while most of the other medicaments like MTAD (Mixture of Tetracycline, an Acid, and a Detergent) and Triple Antibiotic Paste (TAP) consist of antibiotics which can lead to development of antibiotic resistance among microorganisms. Thus, in order to use safer and equally effective intracanal medicaments, newer alternatives like chlorhexidine gluconate, ozonized water, etc., are being explored. Similarly, the five vehicles mentioned above are being tested for their antimicrobial activity in this study. Results: All vehicles exhibited bactericidal activity at 100% concentration. Conclusion: Propylene glycol was effective against three organisms namely S. mutans E. faecalis and E. coli and its bactericidal activity was at 50%, 25% and 50% respectively. PEG 1000 was effective against S. mutans and E. coli at 25%. Hence propylene glycol was effective on more number of organisms of which E. faecalis is a known resistant species. PEG 1000 was bactericidal at a lower concentration but was effective on two organisms only.
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Affiliation(s)
- Triveni Mohan Nalawade
- Department of Pedodontics and Preventive Dentistry, KLE VK Institute of Dental Sciences, Belgaum, Karnataka, India
| | - Kishore Bhat
- Department of Microbiology, Dr. Prabhakar Kore's Basic Science Research Centre, KLE University, Belgaum, Karnataka, India
| | - Suma H P Sogi
- Department of Pedodontics and Preventive Dentistry, Maharishi Markandeshwar College of Dental Sciences and Research, Ambala, Haryana, India
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23
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Ozcelik B, Brown KD, Blencowe A, Ladewig K, Stevens GW, Scheerlinck JPY, Abberton K, Daniell M, Qiao GG. Biodegradable and biocompatible poly(ethylene glycol)-based hydrogel films for the regeneration of corneal endothelium. Adv Healthc Mater 2014; 3:1496-507. [PMID: 24652807 DOI: 10.1002/adhm.201400045] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Indexed: 12/16/2022]
Abstract
Corneal endothelial cells (CECs) are responsible for maintaining the transparency of the human cornea. Loss of CECs results in blindness, requiring corneal transplantation. In this study, fabrication of biocompatible and biodegradable poly(ethylene glycol) (PEG)-based hydrogel films (PHFs) for the regeneration and transplantation of CECs is described. The 50-μm thin hydrogel films have similar or greater tensile strengths to human corneal tissue. Light transmission studies reveal that the films are >98% optically transparent, while in vitro degradation studies demonstrate their biodegradation characteristics. Cell culture studies demonstrate the regeneration of sheep corneal endothelium on the PHFs. Although sheep CECs do not regenerate in vivo, these cells proliferate on the films with natural morphology and become 100% confluent within 7 d. Implantation of the PHFs into live sheep corneas demonstrates the robustness of the films for surgical purposes. Regular slit lamp examinations and histology of the cornea after 28 d following surgery reveal minimal inflammatory responses and no toxicity, indicating that the films are benign. The results of this study suggest that PHFs are excellent candidates as platforms for the regeneration and transplantation of CECs as a result of their favorable biocompatibility, degradability, mechanical, and optical properties.
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Affiliation(s)
- Berkay Ozcelik
- Department of Chemical and Biomolecular Engineering; The University of Melbourne; Victoria 3010 Australia
| | - Karl D. Brown
- Centre for Eye Research Australia (CERA); Royal Victorian Eye & Ear Hospital, Peter Howson Wing; Victoria 3002 Australia
| | - Anton Blencowe
- Department of Chemical and Biomolecular Engineering; The University of Melbourne; Victoria 3010 Australia
| | - Katharina Ladewig
- Department of Chemical and Biomolecular Engineering; The University of Melbourne; Victoria 3010 Australia
| | - Geoffrey W. Stevens
- Department of Chemical and Biomolecular Engineering; The University of Melbourne; Victoria 3010 Australia
| | | | - Keren Abberton
- O'Brien Institute; Fitzroy St, Fitzroy Victoria 3065 Australia
- Faculty of Health Sciences, Australian Catholic University; Melbourne Australia
- Department of Surgery; St. Vincent's Hospital; Fitzroy St Fitzroy Victoria 3065 Australia
| | - Mark Daniell
- Centre for Eye Research Australia (CERA); Royal Victorian Eye & Ear Hospital, Peter Howson Wing; Victoria 3002 Australia
| | - Greg G. Qiao
- Department of Chemical and Biomolecular Engineering; The University of Melbourne; Victoria 3010 Australia
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24
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Highly porous and mechanically robust polyester poly(ethylene glycol) sponges as implantable scaffolds. Acta Biomater 2014; 10:2769-80. [PMID: 24561711 DOI: 10.1016/j.actbio.2014.02.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Revised: 01/08/2014] [Accepted: 02/12/2014] [Indexed: 01/07/2023]
Abstract
The development of suitable scaffolds plays a significant role in tissue engineering research. Although scaffolds with promising features have been produced via a variety of innovative methods, there are no fully synthetic tissue engineering scaffolds that possess all the desired properties in one three-dimensional construct. Herein, we report the development of novel polyester poly(ethylene glycol) (PEG) sponges that display many of the desirable scaffold characteristics. Our novel synthetic approach utilizes acidchloride/alcohol chemistry, whereby the reaction between a hydroxyl end-functionalized 4-arm PEG and sebacoyl chloride resulted in cross-linking and simultaneous hydrogen chloride gas production, which was exploited for the in situ formation of highly interconnected pores. Variation of the fabrication conditions, including the precursor volume and concentration, allowed the pore size and structure as well as the compressive properties to be tailored. The sponges were found to possess excellent elastic properties, preserving their shape even after 80% compressive strain without failure. The benign properties of the sponges were demonstrated in an in vivo subcutaneous rat model, which also revealed uniform infiltration of vascularized tissue by 8 weeks and complete degradation of the sponges by 16 weeks, with only a minimal inflammatory response being observed over the course of the experiments.
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25
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Pellegrini G, Starkey Lewis PJ, Palmer L, Hetzel U, Goldring CE, Park BK, Kipar A, Williams DP. Intraperitoneal administration of high doses of polyethylene glycol (PEG) causes hepatic subcapsular necrosis and low-grade peritonitis with a rise in hepatic biomarkers. Toxicology 2013; 314:262-6. [DOI: 10.1016/j.tox.2013.06.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 05/25/2013] [Accepted: 06/16/2013] [Indexed: 01/28/2023]
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26
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Williams HD, Trevaskis NL, Charman SA, Shanker RM, Charman WN, Pouton CW, Porter CJH. Strategies to address low drug solubility in discovery and development. Pharmacol Rev 2013; 65:315-499. [PMID: 23383426 DOI: 10.1124/pr.112.005660] [Citation(s) in RCA: 1003] [Impact Index Per Article: 91.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Drugs with low water solubility are predisposed to low and variable oral bioavailability and, therefore, to variability in clinical response. Despite significant efforts to "design in" acceptable developability properties (including aqueous solubility) during lead optimization, approximately 40% of currently marketed compounds and most current drug development candidates remain poorly water-soluble. The fact that so many drug candidates of this type are advanced into development and clinical assessment is testament to an increasingly sophisticated understanding of the approaches that can be taken to promote apparent solubility in the gastrointestinal tract and to support drug exposure after oral administration. Here we provide a detailed commentary on the major challenges to the progression of a poorly water-soluble lead or development candidate and review the approaches and strategies that can be taken to facilitate compound progression. In particular, we address the fundamental principles that underpin the use of strategies, including pH adjustment and salt-form selection, polymorphs, cocrystals, cosolvents, surfactants, cyclodextrins, particle size reduction, amorphous solid dispersions, and lipid-based formulations. In each case, the theoretical basis for utility is described along with a detailed review of recent advances in the field. The article provides an integrated and contemporary discussion of current approaches to solubility and dissolution enhancement but has been deliberately structured as a series of stand-alone sections to allow also directed access to a specific technology (e.g., solid dispersions, lipid-based formulations, or salt forms) where required.
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Affiliation(s)
- Hywel D Williams
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria, Australia
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27
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Stokes AH, Kemp DC, Faiola B, Jordan HL, Merrill CL, Hailey JR, Brown RE, Bailey DW. Effects of Solutol (Kolliphor) and Cremophor in Polyethylene Glycol 400 Vehicle Formulations in Sprague-Dawley Rats and Beagle Dogs. Int J Toxicol 2013; 32:189-97. [DOI: 10.1177/1091581813485452] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
When conventional vehicles (eg, methylcellulose and water) impart inadequate physical, chemical, and/or biological properties for proper toxicological assessment of test article formulations, nonconventional vehicles may be considered. Often toxicity data for nonconventional vehicle formulations are limited. Studies were conducted to collect toxicity data from a rodent and a non-rodent species given 2 nonconventional vehicles, Solutol HS15/polyethylene glycol (PEG) 400 and Cremophor RH40/PEG 400, with differing formulations and dose volumes (10 mL/kg for rats; 2 or 5 mL/kg for dogs). In rats, both vehicles caused increase in kidney weights (males only) and decrease in thymic weights (males only) without concurrent microscopic findings; altered urine electrolytes, minimally decreased serum electrolytes (males only), and increased serum total cholesterol (females only) were also present. The Cremophor formulation was also associated with increased serum urea (males only) and urine phosphorus: creatinine. For rats given the Solutol formulation, both genders had decreased urine glucose parameters and males had increased urine volume. In dogs, loose/watery feces and emesis were present given either vehicle, and mucus-cell hyperplasia of the ileum was present given the Solutol formulation. Increased red blood cell mass and decreased urine volume in dogs given 30% Solutol/70% PEG 400 (5 mL/kg/d) were likely due to subclinical dehydration and hemoconcentration. For the Cremophor formulations, dose volume-dependent increased incidence of minimal subepithelial gastric hemorrhage was noted in dogs, and dogs given 5 mL/kg/d showed increased serum urea nitrogen. Overall, regardless of the formulation or dose volume, neither vehicle produced overt toxicity in either species, but the Solutol formulation produced fewer effects in rats. Generally, lower dose volumes minimized the severity and/or incidence of findings.
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Affiliation(s)
- Alan H. Stokes
- GlaxoSmithKline Research and Development, Safety Assessment, Research Triangle Park, NC, USA
| | - Daniel C. Kemp
- GlaxoSmithKline Research and Development, Safety Assessment, Research Triangle Park, NC, USA
| | - Brenda Faiola
- GlaxoSmithKline Research and Development, Safety Assessment, Research Triangle Park, NC, USA
- Current Address: Aptiv Solutions, Medical Science and Consulting Services, Durham, NC, USA
| | - Holly L. Jordan
- GlaxoSmithKline Research and Development, Safety Assessment, Research Triangle Park, NC, USA
| | - Christine L. Merrill
- GlaxoSmithKline Research and Development, Safety Assessment, Research Triangle Park, NC, USA
| | - James R. Hailey
- GlaxoSmithKline Research and Development, Safety Assessment, Research Triangle Park, NC, USA
| | - Randy E. Brown
- GlaxoSmithKline Research and Development, Safety Assessment, Research Triangle Park, NC, USA
| | - David W. Bailey
- GlaxoSmithKline Research and Development, Safety Assessment, Research Triangle Park, NC, USA
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