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Miar S, Gonzales G, Dion G, Ong JL, Malka R, Bizios R, Branski RC, Guda T. Electrospun composite-coated endotracheal tubes with controlled siRNA and drug delivery to lubricate and minimize upper airway injury. Biomaterials 2024; 309:122602. [PMID: 38768544 DOI: 10.1016/j.biomaterials.2024.122602] [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: 04/11/2023] [Revised: 04/25/2024] [Accepted: 05/02/2024] [Indexed: 05/22/2024]
Abstract
Endotracheal Tubes (ETTs) maintain and secure a patent airway; however, prolonged intubation often results in unintended injury to the mucosal epithelium and inflammatory sequelae which complicate recovery. ETT design and materials used have yet to adapt to address intubation associated complications. In this study, a composite coating of electrospun polycaprolactone (PCL) fibers embedded in a four-arm polyethylene glycol acrylate matrix (4APEGA) is developed to transform the ETT from a mechanical device to a dual-purpose device capable of delivering multiple therapeutics while preserving coating integrity. Further, the composite coating system (PCL-4APEGA) is capable of sustained delivery of dexamethasone from the PCL phase and small interfering RNA (siRNA) containing polyplexes from the 4APEGA phase. The siRNA is released rapidly and targets smad3 for immediate reduction in pro-fibrotic transforming growth factor-beta 1 (TGFϐ1) signaling in the upper airway mucosa as well as suppressing long-term sequelae in inflammation from prolonged intubation. A bioreactor was used to study mucosal adhesion to the composite PCL-4APEGA coated ETTs and investigate continued mucus secretory function in ex vivo epithelial samples. The addition of the 4APEGA coating and siRNA delivery to the dexamethasone delivery was then evaluated in a swine model of intubation injury and observed to restore mechanical function of the vocal folds and maintain epithelial thickness when observed over 14 days of intubation. This study demonstrated that increase in surface lubrication paired with surface stiffness reduction significantly decreased fibrotic behavior while reducing epithelial adhesion and abrasion.
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Affiliation(s)
- Solaleh Miar
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, USA; Department of Civil, Environmental, and Biomedical Engineering, University of Hartford, West Hartford, CT, USA.
| | - Gabriela Gonzales
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, USA.
| | - Gregory Dion
- Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
| | - Joo L Ong
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, USA.
| | - Ronit Malka
- Department of Otolaryngology - Head and Neck Surgery, Brooke Army Medical Center, JBSA, Fort Sam Houston, TX, 78234, USA.
| | - Rena Bizios
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, USA.
| | - Ryan C Branski
- Departments of Rehabilitation Medicine and Otolaryngology-Head and Neck Surgery, NYU Grossman School of Medicine, New York, NY, USA.
| | - Teja Guda
- Department of Biomedical Engineering and Chemical Engineering, The University of Texas at San Antonio, USA; Department of Cell Systems and Anatomy, University of Texas Health San Antonio, San Antonio, TX, USA.
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Drago S, Utzeri MA, Mauro N, Cavallaro G. Polyamidoamine-Carbon Nanodot Conjugates with Bioreducible Building Blocks: Smart Theranostic Platforms for Targeted siRNA Delivery. Biomacromolecules 2024; 25:1191-1204. [PMID: 38178792 PMCID: PMC10865362 DOI: 10.1021/acs.biomac.3c01185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/23/2023] [Accepted: 12/26/2023] [Indexed: 01/06/2024]
Abstract
This study focuses on designing hybrid theranostic nanosystems, utilizing gadolinium-doped carbon nanodots decorated with bioreducible amphoteric polyamidoamines (PAAs). The objective is to synergize the exceptional theranostic properties of gadolinium-doped carbon nanodots (CDs) with the siRNA complexation capabilities of PAAs. Linear copolymeric polyamidoamines, based on N,N'-bis(acryloyl)cystamine, arginine, and agmatine, were synthesized, resulting in three distinct amphoteric copolymers. Notably, sulfur bridges within the PAA repeating units confer pronounced susceptibility to glutathione-mediated degradation─a key attribute in the tumor microenvironment. This pathway enables controlled and stimuli-responsive siRNA release, theoretically providing precise spatiotemporal control over therapeutic interventions. The selected PAA, conjugated with CDs using the redox-sensitive spacer cystamine, formed the CDs-Cys-PAA conjugate with superior siRNA complexing capacity. Stable against polyanion exchange, the CDs-Cys-PAA/siRNA complex released siRNA in the presence of GSH. In vitro studies assessed cytocompatibility, internalization, and gene silencing efficacy on HeLa, MCF-7, and 16HBE cell lines.
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Affiliation(s)
- Salvatore
Emanuele Drago
- Laboratory of Biocompatible
Polymers, Department of Biological, Chemical and Pharmaceutical Sciences
and Technologies (STEBICEF), University
of Palermo, Via Archirafi 32, 90123 Palermo, Italy
| | - Mara Andrea Utzeri
- Laboratory of Biocompatible
Polymers, Department of Biological, Chemical and Pharmaceutical Sciences
and Technologies (STEBICEF), University
of Palermo, Via Archirafi 32, 90123 Palermo, Italy
| | - Nicolò Mauro
- Laboratory of Biocompatible
Polymers, Department of Biological, Chemical and Pharmaceutical Sciences
and Technologies (STEBICEF), University
of Palermo, Via Archirafi 32, 90123 Palermo, Italy
| | - Gennara Cavallaro
- Laboratory of Biocompatible
Polymers, Department of Biological, Chemical and Pharmaceutical Sciences
and Technologies (STEBICEF), University
of Palermo, Via Archirafi 32, 90123 Palermo, Italy
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3
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Kaneda M, Dong D, Chen Y, Zhang X, Xue Y, Bryantsev VS, Elimelech M, Zhong M. Molecular Design of Functional Polymers for Silica Scale Inhibition. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:871-882. [PMID: 38150403 DOI: 10.1021/acs.est.3c06504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
Silica polymerization, which involves the condensation reaction of silicic acid, is a fundamental process with wide-ranging implications in biological systems, material synthesis, and scale formation. The formation of a silica-based scale poses significant technological challenges to energy-efficient operations in various industrial processes, including heat exchangers and water treatment membranes. Despite the common strategy of applying functional polymers for inhibiting silica polymerization, the underlying mechanisms of inhibition remain elusive. In this study, we synthesized a series of nitrogen-containing polymers as silica inhibitors and elucidated the role of their molecular structures in stabilizing silicic acids. Polymers with both charged amine and uncharged amide groups in their backbones exhibit superior inhibition performance, retaining up to 430 ppm of reactive silica intact for 8 h under neutral pH conditions. In contrast, monomers of these amine/amide-containing polymers as well as polymers containing only amine or amide functionalities present insignificant inhibition. Molecular dynamics simulations reveal strong binding between the deprotonated silicic acid and a polymer when the amine groups in the polymer are protonated. Notably, an extended chain conformation of the polymer is crucial to prevent proximity between the interacting monomeric silica species, thereby facilitating effective silica inhibition. Furthermore, the hydrophobic nature of alkyl segments in polymer chains disrupts the hydration shell around the polymer, resulting in enhanced binding with ionized silicic acid precursors compared to monomers. Our findings provide novel mechanistic insights into the stabilization of silicic acids with functional polymers, highlighting the molecular design principles of effective inhibitors for silica polymerization.
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Affiliation(s)
- Masashi Kaneda
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, United States
| | - Dengpan Dong
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Yinan Chen
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, United States
| | - Xiaowei Zhang
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, United States
| | - Yazhen Xue
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, United States
| | - Vyacheslav S Bryantsev
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Menachem Elimelech
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, United States
| | - Mingjiang Zhong
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06520, United States
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
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Soradech S, Kengkwasingh P, Williams AC, Khutoryanskiy VV. Synthesis and Evaluation of Poly(3-hydroxypropyl Ethylene-imine) and Its Blends with Chitosan Forming Novel Elastic Films for Delivery of Haloperidol. Pharmaceutics 2022; 14:pharmaceutics14122671. [PMID: 36559165 PMCID: PMC9785711 DOI: 10.3390/pharmaceutics14122671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 11/24/2022] [Accepted: 11/26/2022] [Indexed: 12/03/2022] Open
Abstract
This study aimed to develop novel elastic films based on chitosan and poly(3-hydroxypropyl ethyleneimine) or P3HPEI for the rapid delivery of haloperidol. P3HPEI was synthesized using a nucleophilic substitution reaction of linear polyethyleneimine (L-PEI) with 3-bromo-1-propanol. 1H-NMR and FTIR spectroscopies confirmed the successful conversion of L-PEI to P3HPEI, and the physicochemical properties and cytotoxicity of P3HPEI were investigated. P3HPEI had good solubility in water and was significantly less toxic than the parent L-PEI. It had a low glass transition temperature (Tg = -38.6 °C). Consequently, this new polymer was blended with chitosan to improve mechanical properties, and these materials were used for the rapid delivery of haloperidol. Films were prepared by casting from aqueous solutions and then evaporating the solvent. The miscibility of polymers, mechanical properties of blend films, and drug release profiles from these formulations were investigated. The blends of chitosan and P3HPEI were miscible in the solid state and the inclusion of P3HPEI improved the mechanical properties of the films, producing more elastic materials. A 35:65 (%w/w) blend of chitosan-P3HPEI provided the optimum glass transition temperature for transmucosal drug delivery and so was selected for further investigation with haloperidol, which was chosen as a model hydrophobic drug. Microscopic and X-ray diffractogram (XRD) data indicated that the solubility of the drug in the films was ~1.5%. The inclusion of the hydrophilic polymer P3HPEI allowed rapid drug release within ~30 min, after which films disintegrated, demonstrating that the formulations are suitable for application to mucosal surfaces, such as in buccal drug delivery. Higher release with increasing drug loading allows flexible dosing. Blending P3HPEI with chitosan thus allows the selection of desirable physicochemical and mechanical properties of the films for delivery of haloperidol as a poorly water-soluble drug.
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Affiliation(s)
- Sitthiphong Soradech
- Reading School of Pharmacy, University of Reading, Whiteknights, Reading RG6 6DX, UK
- Expert Centre of Innovative Herbal Products, Thailand Institute of Scientific and Technological Research, Pathum Thani 12120, Thailand
| | - Pattarawadee Kengkwasingh
- Expert Centre of Innovative Herbal Products, Thailand Institute of Scientific and Technological Research, Pathum Thani 12120, Thailand
| | - Adrian C. Williams
- Reading School of Pharmacy, University of Reading, Whiteknights, Reading RG6 6DX, UK
| | - Vitaliy V. Khutoryanskiy
- Reading School of Pharmacy, University of Reading, Whiteknights, Reading RG6 6DX, UK
- Correspondence: ; Tel.: +44-(0)118-378-6119
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Wang X, Wang F, Li S, Yin G, Pu X. Preparation and in vitro evaluation of thermosensitive liposomes targeting for ovarian cancer. Curr Drug Deliv 2022; 19:940-948. [PMID: 35319368 DOI: 10.2174/1567201819666220321110812] [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: 08/03/2021] [Revised: 12/09/2021] [Accepted: 01/14/2022] [Indexed: 12/24/2022]
Abstract
INTRODUCTION Liposomes have been widely used in drug delivery systems because the encapsulation of liposomes changes the biological distribution profile and improves the therapeutic indices of various drugs. Thermosensitive liposomes have been proven to be a precise and effective method for cancer therapy in many preclinical studies. However, the lack of specific targeting ability to cancer cells limited their application in safe and efficient chemotherapy. MATERIALS AND METHODS In the present study, an ovarian targeting ligand namely WSGFPGVWGASVK (WSG) screened by phage display in vivo was grafted on the thermosensitive phospholipids to prepare the liposomes targeting ovarian cancer cells. WSG was first grafted onto the hydrophilic terminal of DSPE-PEG2000 molecules, and then the WSG modified thermosensitive liposomes (WSG-Lipo) were prepared by thin-film hydration method. Doxorubicin hydrochloride (DOX) was used as a model drug to investigate the drug release behavior of liposomes at different temperatures. The specificity of liposomes to SKOV-3 cells was studied by cell uptake in vitro. RESULTS The WSG-Lipo-DOX could release more DOX at 42°C than at 37°C, showing stronger specificity to SKOV-3 cells and thus selectively inhibiting SKOV-3 cells activity in vitro. CONCLUSION The active targeting liposome showed potential in improving the specificity of thermosensitive liposomes and would be applied in the chemotherapy combined with a thermotherapy.
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Affiliation(s)
- Xingming Wang
- College of Biomedical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Fang Wang
- College of Biomedical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Sixie Li
- College of Biomedical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Guangfu Yin
- College of Biomedical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Ximing Pu
- College of Biomedical Engineering, Sichuan University, Chengdu 610065, PR China
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Development of a dry powder for inhalation of nanoparticles codelivering cisplatin and ABCC3 siRNA in lung cancer. Ther Deliv 2021; 12:651-670. [PMID: 34374565 DOI: 10.4155/tde-2020-0117] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background: The current study sought to formulate a dry powder inhalant (DPI) for pulmonary delivery of lipopolymeric nanoparticles (LPNs) consisting of cisplatin and siRNA for multidrug-resistant lung cancer. siRNA against ABCC3 gene was used to silence drug efflux promoter. Results & discussion: The formulation was optimized through the quality by design system by nanoparticle size and cisplatin entrapment. The lipid concentration, polymer concentration and lipid molar ratio were selected as variables. The DPI was characterized by in vitro deposition study using the Anderson cascade impactor. DPI formulation showed improved pulmonary pharmacokinetic parameters of cisplatin with higher residence time in lungs. Conclusion: Local delivery of siRNA and cisplatin to the lung tissue resulted into an enhanced therapeutic effectiveness in combating drug resistance.
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Shahid A, Bhatt P, Miller A, Sutariya V. Honokiol-Loaded Methoxy Poly (Ethylene Glycol) Polycaprolactone Micelles for the Treatment of Age-Related Macular Degeneration. Assay Drug Dev Technol 2021; 19:350-360. [PMID: 34227879 DOI: 10.1089/adt.2021.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Age-related macular degeneration (AMD), a multifactorial age-related retinal hypoxic disorder resulting in irreversible loss of vision, is the foremost cause of blindness in the United States. Current treatment strategies involve multiple intraocular injections of antivascular endothelial growth factor (VEGF) agents into the vitreous of eye. In addition to the challenges of drug localization and targeted delivery, the need of frequent injections into the eye raises patient compliance issues, and thus call for development of sustained drug delivery systems. In this study, a sustained drug delivery system was prepared by loading an antihypoxia-induced factor (HIF) agent, honokiol (HON), into methoxy poly (ethylene glycol) polycaprolactone (MPEG-PCL) polymer. These HON-MPEG-PCL micelles were characterized by evaluating size, ζ potential, in vitro drug release profile, and morphology by transmission electron microscopy. The cytotoxic nature of developed micelles was assessed on human retinal pigment epithelial cell line (ARPE-19) cells by cytotoxicity assay. The cellular uptake and HIF and VEGF expression levels were determined in in vitro settings. Micelles formed had a particle size of 30.8 ± 0.8 nm with the poly dispersity index of 0.19 ± 0.0004 and ζ potential was found to be -5.46 ± 0.49 mv. Entrapment efficiency was calculated to be 64 ± 0.135%. In vitro drug release showed sustained release of drug from the formulation. Result from in vitro cytotoxicity study confirmed noncytotoxic nature of HON-MPEG-PCL micelles compared to HON drug solution. Furthermore, enzyme-linked immunosorbent assay studies performed showed the periodic downregulation of HIF and VEGF, which are major growth factors involved in underlying mechanism of AMD. The results showed successful development of HON-MPEG-PCL micelles, which may be useful for the effective treatment of AMD.
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Affiliation(s)
- Amna Shahid
- Department of Pharmaceutical Sciences, Taneja College of Pharmacy, University of South Florida, Tampa, Florida, USA
| | - Priyanka Bhatt
- Department of Pharmaceutical Sciences, Taneja College of Pharmacy, University of South Florida, Tampa, Florida, USA
| | - Abraian Miller
- Department of Pharmaceutical Sciences, Taneja College of Pharmacy, University of South Florida, Tampa, Florida, USA
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Karimov M, Schulz M, Kahl T, Noske S, Kubczak M, Gockel I, Thieme R, Büch T, Reinert A, Ionov M, Bryszewska M, Franke H, Krügel U, Ewe A, Aigner A. Tyrosine-modified linear PEIs for highly efficacious and biocompatible siRNA delivery in vitro and in vivo. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2021; 36:102403. [PMID: 33932594 DOI: 10.1016/j.nano.2021.102403] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 03/28/2021] [Accepted: 04/09/2021] [Indexed: 10/21/2022]
Abstract
Therapeutic gene silencing by RNA interference relies on the safe and efficient in vivo delivery of small interfering RNAs (siRNAs). Polyethylenimines are among the most studied cationic polymers for gene delivery. For several reasons including superior tolerability, small linear PEIs would be preferable over branched PEIs, but they show poor siRNA complexation. Their chemical modification for siRNA formulation has not been extensively explored so far. We generated a set of small linear PEIs bearing tyrosine modifications (LPxY), leading to substantially enhanced siRNA delivery and knockdown efficacy in vitro in various cell lines, including hard-to-transfect cells. The tyrosine-modified linear 10 kDa PEI (LP10Y) is particularly powerful, associated with favorable physicochemical properties and very high biocompatibility. Systemically administered LP10Y/siRNA complexes reveal antitumor effects in mouse xenograft and patient-derived xenograft (PDX) models, and their direct application into the brain achieves therapeutic inhibition of orthotopic glioma xenografts. LP10Y is particularly interesting for therapeutic siRNA delivery.
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Affiliation(s)
- Michael Karimov
- Rudolf-Boehm-Institute for Pharmacology and Toxicology, Clinical Pharmacology, Leipzig University, Faculty of Medicine, Leipzig, Germany
| | - Marion Schulz
- Rudolf-Boehm-Institute for Pharmacology and Toxicology, Clinical Pharmacology, Leipzig University, Faculty of Medicine, Leipzig, Germany
| | - Tim Kahl
- Rudolf-Boehm-Institute for Pharmacology and Toxicology, Clinical Pharmacology, Leipzig University, Faculty of Medicine, Leipzig, Germany
| | - Sandra Noske
- Rudolf-Boehm-Institute for Pharmacology and Toxicology, Clinical Pharmacology, Leipzig University, Faculty of Medicine, Leipzig, Germany
| | - Malgorzata Kubczak
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Łódź, Łódź, Poland
| | - Ines Gockel
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital Leipzig, Leipzig, Germany
| | - René Thieme
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital Leipzig, Leipzig, Germany
| | - Thomas Büch
- Rudolf-Boehm-Institute for Pharmacology and Toxicology, Clinical Pharmacology, Leipzig University, Faculty of Medicine, Leipzig, Germany
| | - Anja Reinert
- Faculty of Veterinary Medicine, Institute of Anatomy, Histology and Embryology, Leipzig University, Leipzig, Germany
| | - Maksim Ionov
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Łódź, Łódź, Poland
| | - Maria Bryszewska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Łódź, Łódź, Poland
| | - Heike Franke
- Rudolf-Boehm-Institute for Pharmacology and Toxicology, Leipzig University, Faculty of Medicine, Leipzig, Germany
| | - Ute Krügel
- Rudolf-Boehm-Institute for Pharmacology and Toxicology, Leipzig University, Faculty of Medicine, Leipzig, Germany
| | - Alexander Ewe
- Rudolf-Boehm-Institute for Pharmacology and Toxicology, Clinical Pharmacology, Leipzig University, Faculty of Medicine, Leipzig, Germany
| | - Achim Aigner
- Rudolf-Boehm-Institute for Pharmacology and Toxicology, Clinical Pharmacology, Leipzig University, Faculty of Medicine, Leipzig, Germany.
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9
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Controlled post-polymerization modification through modulation of repeating unit reactivity: Proof of concept discussed using linear polyethylenimine example. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123452] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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10
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Co-delivery of cisplatin and siRNA through hybrid nanocarrier platform for masking resistance to chemotherapy in lung cancer. Drug Deliv Transl Res 2020; 11:2052-2071. [DOI: 10.1007/s13346-020-00867-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/12/2020] [Indexed: 12/20/2022]
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Abstract
Age-related macular degeneration (AMD) will be responsible for the vision impairment of more than five million late-aged adults in the next 30 years. Current treatment includes frequent intravitreal injections of anti-vascular endothelial growth factor (VEGF) agents. However, there are methods of drug delivery that can decrease the frequency of intravitreal injections by sustaining drug release. MPEG-PCL ((methoxypoly(ethylene glycol) poly(caprolactone)) has been reported as biocompatible and biodegradable. Polymeric micelles of MPEG-PCL can be useful in efficiently delivering anti-VEGF drugs such as sunitinib to the posterior segment of the eye. In this study, the novel micellar formulation exhibited an average dynamic light scattering (DLS) particle size of 134.2 ± 2.3 nm with a zeta potential of −0.159 ± 0.07 mV. TEM imaging further confirmed the nanoscopic size of the micelles. A sunitinib malate (SM)-MPEG-PCL formulation exhibited a sustained release profile for up to seven days with an overall release percentage of 95.56 ± 2.7%. In addition to their miniscule size, the SM-MPEG-PCL formulation showed minimal cytotoxicity onto the ARPE-19 human retinal pigment epithelial cell line, reporting a percent viability of more than 88% for all concentrations tested at time intervals of 24 h. The SM-MPEG-PCL micelles also exhibited exceptional performance during an anti-VEGF ELISA that decreased the overall VEGF protein expression in the cells across a 24–72 h period. Furthermore, it can be concluded that this type of polymeric vehicle is a promising solution to symptoms caused by AMD and improving the management of those suffering from AMD.
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12
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Nanocarriers in effective pulmonary delivery of siRNA: current approaches and challenges. Ther Deliv 2020; 10:311-332. [PMID: 31116099 DOI: 10.4155/tde-2019-0012] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Research on siRNA is increasing due to its wide applicability as a therapeutic agent in irreversible medical conditions. siRNA inhibits expression of the specific gene after its delivery from formulation to cytosol region of a cell. RNAi (RNA interference) is a mechanism by which siRNA is silencing gene expression for a particular disease. Numerous studies revealed that naked siRNA delivery is not preferred due to instability and poor pharmacokinetic performance. Nanocarriers based delivery of siRNA has the advantage to overcome physiological barriers and protect the integrity of siRNA from degradation by RNAase. Various diseases like lung cancer, cystic fibrosis, asthma, etc can be treated effectively by local lung delivery. The selective targeted therapeutic action in diseased organ and least off targeted cytotoxicity are the key benefits of pulmonary delivery. The current review highlights recent developments in pulmonary delivery of siRNA with novel nanosized formulation approach with the proven in vitro/in vivo applications.
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Narvekar P, Bhatt P, Fnu G, Sutariya V. Axitinib-Loaded Poly(Lactic-Co-Glycolic Acid) Nanoparticles for Age-Related Macular Degeneration: Formulation Development and In Vitro Characterization. Assay Drug Dev Technol 2019; 17:167-177. [DOI: 10.1089/adt.2019.920] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- Priya Narvekar
- Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa, Florida
| | - Priyanka Bhatt
- Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa, Florida
| | - Gulimirerouzi Fnu
- Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa, Florida
| | - Vijaykumar Sutariya
- Department of Pharmaceutical Sciences, College of Pharmacy, University of South Florida, Tampa, Florida
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Ghosh S, Lalani R, Patel V, Bardoliwala D, Maiti K, Banerjee S, Bhowmick S, Misra A. Combinatorial nanocarriers against drug resistance in hematological cancers: Opportunities and emerging strategies. J Control Release 2019; 296:114-139. [DOI: 10.1016/j.jconrel.2019.01.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 01/10/2019] [Accepted: 01/11/2019] [Indexed: 12/16/2022]
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