1
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Goher SS, Aly SH, Abu-Serie MM, El-Moslamy SH, Allam AA, Diab NH, Hassanein KMA, Eissa RA, Eissa NG, Elsabahy M, Kamoun EA. Electrospun Tamarindus indica-loaded antimicrobial PMMA/cellulose acetate/PEO nanofibrous scaffolds for accelerated wound healing: In-vitro and in-vivo assessments. Int J Biol Macromol 2024; 258:128793. [PMID: 38134993 DOI: 10.1016/j.ijbiomac.2023.128793] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 12/10/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023]
Abstract
In this work, Tamarindus indica (T. indica)-loaded crosslinked poly(methyl methacrylate) (PMMA)/cellulose acetate (CA)/poly(ethylene oxide) (PEO) electrospun nanofibers were designed and fabricated for wound healing applications. T. indica is a plant extract that possesses antidiabetic, antimicrobial, antioxidant, antimalarial and wound healing properties. T. indica leaves extract of different concentrations were blended with a tuned composition of a matrix comprised of PMMA (10 %), CA (2 %) and PEO (1.5 %), and were electrospun to form smooth, dense and continuous nanofibers as illustrated by SEM investigation. In vitro evaluation of T. indica-loaded nanofibers on normal human skin fibroblasts (HBF4) revealed a high compatibility and low cytotoxicity. T. indica-loaded nanofibers significantly increased the healing activity of scratched HBF4 cells, as compared to the free plant extract, and the healing activity was significantly enhanced upon increasing the plant extract concentration. Moreover, T. indica-loaded nanofibers demonstrated significant antimicrobial activity in vitro against the tested microbes. In vivo, nanofibers resulted in a superior wound healing efficiency compared to the control untreated animals. Hence, engineered nanofibers loaded with potent phytochemicals could be exploited as an effective biocompatible and eco-friendly antimicrobial biomaterials and wound healing composites.
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Affiliation(s)
- Shaimaa S Goher
- Nanotechnology Research Centre (NTRC), The British University in Egypt (BUE), Suez Desert Road, El Sherouk City, Cairo 1183, Egypt
| | - Shaza H Aly
- Department of Pharmacognosy, School of Pharmacy, Badr University in Cairo, Badr City, Cairo 11829, Egypt
| | - Marwa M Abu-Serie
- Medical Biotechnology Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg Al-Arab, Alexandria 21934, Egypt
| | - Shahira H El-Moslamy
- Bioprocess Development Department (BID), Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, Alexandria 21934, Egypt
| | - Ayat A Allam
- Department of Pharmaceutics, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt; Department of Pharmaceutics, Faculty of Pharmacy, Sphinx University, Assiut 71515, Egypt
| | - Nadeen H Diab
- Department of Pharmacognosy, Faculty of Pharmacy, Assiut university, Assiut 71526, Egypt
| | - Khaled M A Hassanein
- Pathology and Clinical Pathology Department, Faculty of Veterinary Medicine, Assiut University, Assiut 71526, Egypt
| | - Rana A Eissa
- Badr University in Cairo Research Center, Badr University in Cairo, Badr City, Cairo 11829, Egypt
| | - Noura G Eissa
- Badr University in Cairo Research Center, Badr University in Cairo, Badr City, Cairo 11829, Egypt; Department of Pharmaceutics, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Mahmoud Elsabahy
- Badr University in Cairo Research Center, Badr University in Cairo, Badr City, Cairo 11829, Egypt; Department of Chemistry, Texas A&M University, College Station, TX 77842, USA.
| | - Elbadawy A Kamoun
- Polymeric Materials Research Dep., Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), Alexandria 21934, Egypt; Biomaterials for Medical and Pharmaceutical Applications Research Group, Nanotechnology Research Center (NTRC), The British University in Egypt (BUE), Cairo 11837, Egypt.
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2
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Abdelazim EB, Abed T, Goher SS, Alya SH, El-Nashar HAS, El-Moslamy SH, El-Fakharany EM, Abdul-Baki EA, Shakweer MM, Eissa NG, Elsabahy M, Kamoun EA. In vitro and in vivo studies of Syzygium cumini-loaded electrospun PLGA/PMMA/collagen nanofibers for accelerating topical wound healing. RSC Adv 2024; 14:101-117. [PMID: 38173621 PMCID: PMC10758764 DOI: 10.1039/d3ra06355k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 11/25/2023] [Indexed: 01/05/2024] Open
Abstract
This work aims to develop plant extract-loaded electrospun nanofiber as an effective wound dressing scaffolds for topical wound healing. Electrospun nanofibers were fabricated from Syzygium cumini leaf extract (SCLE), poly(lactic-co-glycolic acid) (PLGA), poly(methyl methacrylate) (PMMA), collagen and glycine. Electrospinning conditions were optimized to allow the formation of nanosized and uniform fibers that display smooth surface. Morphology and swelling behavior of the formed nanofibers were studied. In addition, the antibacterial activity of the nanofibers against multidrug-resistant and human pathogens was assessed by agar-well diffusion. Results showed that nanofibers containing Syzygium cumini extract at concentrations of 0.5 and 1% w/v exhibited greater antibacterial activity against the tested Gram-positive (i.e., Staphylococcus aureus, Candida albicans, Candida glabrata and Bacillus cereus) and Gram-negative (i.e., Salmonella paratyphi and Escherichia coli) pathogens compared to the same concentrations of the plain extract. Furthermore, in vivo wound healing was evaluated in Wistar rats over a period of 14 days. In vivo results demonstrated that nanofiber mats containing SCLE and collagen significantly improved wound healing within two weeks, compared to the control untreated group. These findings highlight the potential of fabricated nanofibers in accelerating wound healing and management of topical acute wounds.
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Affiliation(s)
- Esraa B Abdelazim
- Badr University in Cairo Research Center, Badr University in Cairo Badr City Cairo 11829 Egypt
| | - Tasneem Abed
- Badr University in Cairo Research Center, Badr University in Cairo Badr City Cairo 11829 Egypt
| | - Shaimaa S Goher
- Nanotechnology Research Centre (NTRC), The British University in Egypt (BUE) Suez Desert Road El Sherouk City Cairo 1183 Egypt
| | - Shaza H Alya
- Department of Pharmacognosy, Faculty of Pharmacy, Badr University in Cairo Cairo 11829 Egypt
| | - Heba A S El-Nashar
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University Cairo 11566 Egypt
| | - Shahira H El-Moslamy
- Bioprocess Development Dep., Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research and Technological Applications (SRTA-City) New Borg Al-Arab City 21934 Alexandria Egypt
| | - Esmail M El-Fakharany
- Protein Research Dep., Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research and Technological Applications (SRTA-City) New Borg Al-Arab City 21934 Alexandria Egypt
| | - Enas A Abdul-Baki
- Badr University in Cairo Research Center, Badr University in Cairo Badr City Cairo 11829 Egypt
- Genomic Signature Cancer Center, Next Generation Sequencer Unit, Tanta University Global Educational Hospital, Tanta University Tanta Egypt
| | - Marwa Mosaad Shakweer
- Department of Pathology, Faculty of Medicine, Badr University in Cairo Cairo 11829 Egypt
- Department of Pathology, Faculty of Medicine, Ain Shams University Cairo Egypt
| | - Noura G Eissa
- Badr University in Cairo Research Center, Badr University in Cairo Badr City Cairo 11829 Egypt
- Department of Pharmaceutics, Faculty of Pharmacy, Zagazig University Zagazig 44519 Egypt
| | - Mahmoud Elsabahy
- Badr University in Cairo Research Center, Badr University in Cairo Badr City Cairo 11829 Egypt
- Department of Chemistry, Texas A&M University College Station TX 77842 USA
| | - Elbadawy A Kamoun
- Polymeric Materials Research Dep., Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City) Alexandria 21934 Egypt
- Biomaterials for Medical and Pharmaceutical Applications Research Group, Nanotechnology Research Centre (NTRC), The British University in Egypt (BUE) Suez Desert Road El Sherouk City Cairo 1183 Egypt
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3
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Eissa RG, Eissa NG, Eissa RA, Diab NH, Abdelshafi NA, Shaheen MA, Elsabahy M, Hammad SK. Oral proniosomal amitriptyline and liraglutide for management of diabetic neuropathy: Exceptional control over hyperglycemia and neuropathic pain. Int J Pharm 2023; 647:123549. [PMID: 37890645 DOI: 10.1016/j.ijpharm.2023.123549] [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: 06/14/2023] [Revised: 09/19/2023] [Accepted: 10/23/2023] [Indexed: 10/29/2023]
Abstract
Exploitation of nanocarriers provides a compartment for enclosing drugs to protect them from degradation and potentiate their therapeutic efficiency. In the current study, amitriptyline- and liraglutide-loaded proniosomes were constructed for management of diabetic neuropathy, a serious complication associated with diabetes, that triggers spontaneous pain in patients and results in impaired quality of life. The developed therapeutic proniosomes were extensively characterized via dynamic light scattering, scanning electron microscopy, transmission electron microscopy, and Fourier transform-infrared spectroscopy. High entrapment efficiency could be attained for both drugs in the proniosomes, and the reconstituted amitriptyline- and liraglutide-loaded niosomes possessed spherical morphology and particle sizes of 585.3 nm and 864.4 nm, respectively. In a diabetic neuropathy rat model, oral administration of the developed amitriptyline- and liraglutide-loaded proniosomes significantly controlled blood glucose levels, reduced neuropathic pain, oxidative stress and inflammatory markers, and improved histological structure of the sciatic nerve as compared to the oral and subcutaneous administration of amitriptyline and liraglutide, respectively. Loading of the tricyclic antidepressant amitriptyline and the antidiabetic peptide liraglutide into proniosomes resulted in exceptional control over hyperglycemia and neuropathic pain, and thus could provide an auspicious delivery system for management of neuropathic pain and control of blood glucose levels.
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Affiliation(s)
- Rana G Eissa
- Department of Biochemistry, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Noura G Eissa
- Department of Pharmaceutics, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt; Badr University in Cairo Research Center, Badr University in Cairo, Badr City, Cairo 11829, Egypt
| | - Rana A Eissa
- Badr University in Cairo Research Center, Badr University in Cairo, Badr City, Cairo 11829, Egypt
| | - Nadeen H Diab
- Department of Pharmacognosy, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt
| | - Nahla A Abdelshafi
- Department of Pharmaceutical Analytical Chemistry, School of Pharmacy, Badr University in Cairo, Badr City, Cairo 11829, Egypt
| | - Mohamed A Shaheen
- Department of Histology & Cell Biology, Faculty of Medicine, Zagazig University, Zagazig 44519, Egypt
| | - Mahmoud Elsabahy
- Badr University in Cairo Research Center, Badr University in Cairo, Badr City, Cairo 11829, Egypt; Department of Chemistry, Texas A&M University, College Station, TX 77842, USA.
| | - Sally K Hammad
- Department of Biochemistry, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
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Eissa RA, Saafan HA, Ali AE, Ibrahim KM, Eissa NG, Hamad MA, Pang C, Guo H, Gao H, Elsabahy M, Wooley KL. Design of nanoconstructs that exhibit enhanced hemostatic efficiency and bioabsorbability. NANOSCALE 2022; 14:10738-10749. [PMID: 35866631 DOI: 10.1039/d2nr02043b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Hemorrhage is a prime cause of death in civilian and military traumatic injuries, whereby a significant proportion of death and complications occur prior to paramedic arrival and hospital resuscitation. Hence, it is crucial to develop hemostatic materials that are able to be applied by simple processes and allow control over bleeding by inducing rapid hemostasis, non-invasively, until subjects receive necessary medical care. This tutorial review discusses recent advances in synthesis and fabrication of degradable hemostatic nanomaterials and nanocomposites. Control of assembly and fine-tuning of composition of absorbable (i.e., degradable) hemostatic supramolecular structures and nanoconstructs have afforded the development of smart devices and scaffolds capable of efficiently controlling bleeding while degrading over time, thereby reducing surgical operation times and hospitalization duration. The nanoconstructs that are highlighted have demonstrated hemostatic efficiency pre-clinically in animal models, while also sharing characteristics of degradability, bioabsorbability and presence of nano-assemblies within their compositions.
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Affiliation(s)
- Rana A Eissa
- School of Biotechnology and Science Academy, Badr University in Cairo, Badr City, Cairo 11829, Egypt.
| | - Hesham A Saafan
- School of Biotechnology and Science Academy, Badr University in Cairo, Badr City, Cairo 11829, Egypt.
| | - Aliaa E Ali
- Department of Chemistry, University of Turku, Vatselankatu 2, 20014 Turku, Finland
| | - Kamilia M Ibrahim
- Department of Pharmacology, Faculty of Pharmacy, Ain Shams University, Cairo 11561, Egypt
| | - Noura G Eissa
- School of Biotechnology and Science Academy, Badr University in Cairo, Badr City, Cairo 11829, Egypt.
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Mostafa A Hamad
- Department of Surgery, Faculty of Medicine, Assiut University, Assiut 71515, Egypt
| | - Ching Pang
- Departments of Chemistry, Chemical Engineering, and Materials Science & Engineering, Texas A&M University, College Station, Texas 77842, USA.
| | - Hongming Guo
- Departments of Chemistry, Chemical Engineering, and Materials Science & Engineering, Texas A&M University, College Station, Texas 77842, USA.
| | - Hui Gao
- State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering, Tiangong University, Tianjin 300387, P. R. China.
| | - Mahmoud Elsabahy
- School of Biotechnology and Science Academy, Badr University in Cairo, Badr City, Cairo 11829, Egypt.
- Departments of Chemistry, Chemical Engineering, and Materials Science & Engineering, Texas A&M University, College Station, Texas 77842, USA.
- Misr University for Science and Technology, 6th of October City, Cairo 12566, Egypt
| | - Karen L Wooley
- Departments of Chemistry, Chemical Engineering, and Materials Science & Engineering, Texas A&M University, College Station, Texas 77842, USA.
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Gomaa E, Fathi HA, Eissa NG, Elsabahy M. Methods for preparation of nanostructured lipid carriers. Methods 2021; 199:3-8. [PMID: 33992771 DOI: 10.1016/j.ymeth.2021.05.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/06/2021] [Accepted: 05/11/2021] [Indexed: 12/14/2022] Open
Abstract
Construction of nanocarriers of different structures and properties have shown great promise as delivery systems for a wide range of drugs to improve therapeutic effects and reduce side effects. Nanostructured lipid carriers (NLCs) have been introduced as a new generation of solid lipid nanoparticles (SLNs) to overcome several of the limitations associated with the SLNs. NLCs consist of a blend of solid and liquid lipids which result in a partially crystallized lipid system that enables higher drug loading efficiency compared to SLNs. Owing to their biocompatibility, low toxicity, ease of preparation and scaling-up, and high stability, NLCs have been exploited in numerous pharmaceutical applications. Different methods for fabrication of NLCs have been described in the literature. In this article, procedures involved in emulsification-solvent evaporation method, one of the commonly utilized methods for preparation of NLCs, are described in detail. Critical aspects that should be considered throughout preparation process are also highlighted to allow for consistent and reproducible construction of NLCs.
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Affiliation(s)
- Eman Gomaa
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt
| | - Heba A Fathi
- Assiut International Center of Nanomedicine, Al-Rajhy Liver Hospital, Assiut University, Assiut 71515, Egypt
| | - Noura G Eissa
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt; Science Academy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt
| | - Mahmoud Elsabahy
- Science Academy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt; Department of Pharmaceutics, Faculty of Pharmacy, Assiut University, Assiut 71515, Egypt; Misr University for Science and Technology, 6(th) of October City, 12566, Egypt.
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6
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Thabet Y, Elsabahy M, Eissa NG. Methods for preparation of niosomes: A focus on thin-film hydration method. Methods 2021; 199:9-15. [PMID: 34000392 DOI: 10.1016/j.ymeth.2021.05.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/06/2021] [Accepted: 05/11/2021] [Indexed: 12/27/2022] Open
Abstract
Development of nanocarriers has opened new avenues for the delivery of therapeutics of various pharmacological activities with improved targeting properties and reduced side effects. Niosomes, non-ionic-based vesicles, have drawn much interest in various biomedical applications, owing to their unique characteristics and their ability to encapsulate both hydrophilic and lipophilic cargoes. Niosomes share structural similarity with liposomes while overcoming limitations associated with stability, sterilization, and large-scale production of liposomes. Different methods for preparation of niosomes have been described in the literature, each having its own merits and a great impact on the sizes and characteristics of the formed niosomes. In this article, procedures involved in the thin-film hydration method, a commonly used method for the preparation of niosomes, are described in detail, while highlighting precautions that should be considered for consistent and reproducible construction of niosomes.
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Affiliation(s)
- Yasmeena Thabet
- Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt; Department of Biomedical Sciences, Florida State University College of Medicine, Tallahassee, FL 32304, USA
| | - Mahmoud Elsabahy
- Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt; Assiut International Center of Nanomedicine, Alrajhy Liver Hospital, Department of Pharmaceutics, Faculty of Pharmacy, Assiut University, Assiut 71515, Egypt; Misr University for Science and Technology, 6th of October City, 12566, Egypt
| | - Noura G Eissa
- Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt; Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Zagazig University, Zagazig 44519, Egypt.
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Hadiya S, Radwan R, Zakaria M, El-Sherif T, Hamad MA, Elsabahy M. Nanoparticles integrating natural and synthetic polymers for in vivo insulin delivery. Pharm Dev Technol 2020; 26:30-40. [PMID: 33019826 DOI: 10.1080/10837450.2020.1832117] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The aims of the current study were to develop insulin-loaded nanoparticles comprised of various polymers at different compositions, and to evaluate their ability to lower blood glucose levels in diabetic rats following subcutaneous and oral administrations. Several combinations of natural and synthetic polymers have been utilized for preparation of nanoparticles including, chitosan, alginate, albumin and Pluronic. Nanosized (170 nm-800 nm) spherical particles of high encapsulation efficiency (15-52%) have been prepared. Composition and ratios between the integrated polymers played a pivotal role in determining size, zeta potential, and in vivo hypoglycemic activity of particles. After subcutaneous and oral administration in diabetic rats, some of the insulin-loaded nanoparticles were able to induce much higher hypoglycemic effect as compared to the unloaded free insulin. For instance, subcutaneous injection of nanoparticles comprised of chitosan combined with sodium tripolyphosphate, Pluronic or alginate/calcium chloride, resulted in comparable hypoglycemic effects to free insulin, at two-fold lower dose. Nanoparticles were well-tolerated after oral administration in rats, as evidenced by by measuring levels of alanine aminotransferase, aspartate aminotransferases, albumin, creatinine and urea. This study indicates that characteristics and delivery efficiency of nanomaterials can be controlled via utilizing several natural/synthetic polymers and by fine-tuning of combination ratio between polymers.
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Affiliation(s)
- Safy Hadiya
- Assiut International Center of Nanomedicine, Al-Rajhy Liver Hospital, Assiut University, Assiut, Egypt
| | - Radwa Radwan
- Assiut International Center of Nanomedicine, Al-Rajhy Liver Hospital, Assiut University, Assiut, Egypt
| | - Menna Zakaria
- Assiut International Center of Nanomedicine, Al-Rajhy Liver Hospital, Assiut University, Assiut, Egypt
| | - Tahra El-Sherif
- Department of Clinical Pathology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Mostafa A Hamad
- Department of Surgery, Faculty of Medicine, Assiut University, Assiut, Egypt
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Abdelkader A, Fathi HA, Hamad MA, Elsabahy M. Nanomedicine: a new paradigm to overcome drug incompatibilities. J Pharm Pharmacol 2020; 72:1289-1305. [PMID: 32436221 DOI: 10.1111/jphp.13292] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 04/26/2020] [Indexed: 12/28/2022]
Abstract
OBJECTIVES Drug incompatibilities may compromise the safety and effectiveness of combined drugs and result in mild-to-serious clinical complications, such as catheter obstruction, loss of drug efficacy, formation of toxic derivatives and embolism. Various preventive strategies have been implemented to overcome drug incompatibilities with limited success. This review presents an innovative approach to prevent drug incompatibilities via isolating the incompatible drugs into nanostructures. KEY FINDINGS Several examples of incompatible drugs may be loaded separately into nanostructures of various types. Physicochemical characteristics and biocompatibility of the nanomaterials that are being utilized to prevent physicochemical incompatibilities should be carefully considered. CONCLUSIONS There is a new era of exploiting nanomaterials in overcoming various types of physicochemical incompatibilities, with additional benefits of further improvements in pharmacokinetic profiles and pharmacological actions of the administered drugs.
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Affiliation(s)
- Ayat Abdelkader
- Assiut International Center of Nanomedicine, Al-Rajhy Liver Hospital, Assiut University, Assiut, Egypt
| | - Heba A Fathi
- Assiut International Center of Nanomedicine, Al-Rajhy Liver Hospital, Assiut University, Assiut, Egypt
| | - Mostafa A Hamad
- Department of Surgery, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Mahmoud Elsabahy
- Assiut International Center of Nanomedicine, Al-Rajhy Liver Hospital, Assiut University, Assiut, Egypt.,Science Academy, Badr University in Cairo, Badr City, Cairo, Egypt.,Laboratory for Synthetic-Biologic Interactions, Department of Chemistry, Texas A&M University, College Station, TX, USA
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Chotard É, Mohammadi F, Julien P, Berthiaume L, Rudkowska I, Bertrand N. Drinkable lecithin nanovesicles to study the biological effects of individual hydrophobic macronutrients and food preferences. Food Chem 2020; 322:126736. [PMID: 32325363 DOI: 10.1016/j.foodchem.2020.126736] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 03/18/2020] [Accepted: 04/01/2020] [Indexed: 12/12/2022]
Abstract
Fundamental nutritional studies on bioactive molecules require minimizing exposure to confounding foreign elements, like solvents. Herein, aqueous formulations of lecithin nanovesicles are proposed to study three individual trans fatty acids relevant to human nutrition: elaidic acid, trans-vaccenic acid and trans-palmitoleic acid. This proof-of-concept study describes the encapsulation of fatty acids, in vivo bioavailability, and the use of nanovesicles in behavioral experiments. The oral bioavailability of the encapsulated molecules and the selective exposure of animals to each trans-fatty acid of interest were confirmed in healthy rats. Behavioral studies also evidenced that nanovesicles can be used to evaluate the palatability of the lipids and investigate food preferences in mice. Altogether this study shows that lecithin nanovesicles offer an elegant tool to efficiently deliver hydrophobic molecules to animal models. This approach paves the way for future studies deconvoluting the nutritional effects of trans-fatty acids.
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Affiliation(s)
- Élodie Chotard
- Faculty of Pharmacy, CHU de Quebec Research Center, Université Laval, 2705 Laurier Blvd, Québec City G1V 4G2, Canada; Endocrinology and Nephrology Unit, CHU de Quebec Research Center, Université Laval, 2705 Laurier Blvd, Québec City G1V 4G2, Canada
| | - Farzad Mohammadi
- Department of Medicine, Faculty of Medicine, CHU de Quebec Research Center, Université Laval, 2705 Laurier Blvd, Québec City G1V 4G2, Canada; Endocrinology and Nephrology Unit, CHU de Quebec Research Center, Université Laval, 2705 Laurier Blvd, Québec City G1V 4G2, Canada
| | - Pierre Julien
- Department of Medicine, Faculty of Medicine, CHU de Quebec Research Center, Université Laval, 2705 Laurier Blvd, Québec City G1V 4G2, Canada; Endocrinology and Nephrology Unit, CHU de Quebec Research Center, Université Laval, 2705 Laurier Blvd, Québec City G1V 4G2, Canada
| | - Line Berthiaume
- Department of Medicine, Faculty of Medicine, CHU de Quebec Research Center, Université Laval, 2705 Laurier Blvd, Québec City G1V 4G2, Canada; Endocrinology and Nephrology Unit, CHU de Quebec Research Center, Université Laval, 2705 Laurier Blvd, Québec City G1V 4G2, Canada
| | - Iwona Rudkowska
- Department of Kinesiology, Faculty of Medicine, CHU de Quebec Research Center, Université Laval, 2705 Laurier Blvd, Québec City G1V 4G2, Canada; Endocrinology and Nephrology Unit, CHU de Quebec Research Center, Université Laval, 2705 Laurier Blvd, Québec City G1V 4G2, Canada.
| | - Nicolas Bertrand
- Faculty of Pharmacy, CHU de Quebec Research Center, Université Laval, 2705 Laurier Blvd, Québec City G1V 4G2, Canada; Institute of Nutrition and Functional Foods - INAF, Université Laval, 2440 Hochelaga Blvd, Quebec City G1V 0A6, Canada; Endocrinology and Nephrology Unit, CHU de Quebec Research Center, Université Laval, 2705 Laurier Blvd, Québec City G1V 4G2, Canada.
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10
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Allam A, El-Mokhtar MA, Elsabahy M. Vancomycin-loaded niosomes integrated within pH-sensitive in-situ forming gel for treatment of ocular infections while minimizing drug irritation. J Pharm Pharmacol 2019; 71:1209-1221. [DOI: 10.1111/jphp.13106] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Accepted: 04/22/2019] [Indexed: 12/13/2022]
Abstract
Abstract
Objectives
The aim of the current study was to minimize ocular irritation and prolong the pharmacological action of vancomycin via formulation into nanosized spherical niosomes loaded into pH-sensitive in-situ forming gel.
Methods
Stability and rheological behaviour of the various gelling systems were evaluated. The ability of the selected system to eradicate methicillin-resistant Staphylococcus aureus (MRSA) infections was examined in vitro and in vivo. Draize technique was also used to assess ocular irritation in rabbits.
Key findings
Nanosized spherical niosomes loaded with vancomycin at high entrapment efficiency were prepared and integrated into polymeric solution that forms gel in situ upon instillation into the eye, to allow for a further increase in the ocular residence time. In MRSA-infected rabbits, there were 180- and 2.5-fold increases in the antibacterial efficacy after treatment with the vancomycin niosomal gels in comparison with the untreated animals and the animals treated with the vancomycin free drug solution, respectively.
Conclusions
The developed formulations demonstrated promising in-vivo biocompatibility and antibacterial efficacy, signifying their potential application as ophthalmic preparation to overcome ocular infections induced by resistant bacterial strains while minimizing drug irritation and improving patient compliance.
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Affiliation(s)
- Ayat Allam
- Department of Pharmaceutics, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Mohamed A El-Mokhtar
- Department of Microbiology and Immunology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Mahmoud Elsabahy
- Department of Pharmaceutics, Faculty of Pharmacy, Assiut University, Assiut, Egypt
- Misr University for Science and Technology, 6th of October City, Egypt
- Laboratory for Synthetic-Biologic Interactions, Department of Chemistry, Texas A&M University, College Station, TX, USA
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Lu X, Zhang K. PEGylation of therapeutic oligonucletides: From linear to highly branched PEG architectures. NANO RESEARCH 2018; 11:5519-5534. [PMID: 30740197 PMCID: PMC6366847 DOI: 10.1007/s12274-018-2131-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 06/08/2018] [Accepted: 06/18/2018] [Indexed: 05/12/2023]
Abstract
PEGylation, the attachment of poly(ethylene glycol) (PEG), has been adopted to improve the pharmacokinetic properties of oligonucleotide therapeutics for nearly 30 years. Prior efforts mainly focused on the investigation of linear or slightly branched PEG having different molecular weights, terminal functional groups, and possible oligonucleotide sites for functionalization. Recent studies on highly branched PEG (including brush, star, and micellar structures) indicate superior properties in several areas including cellular uptake, gene regulation efficacy, reduction of side effects, and biodistribution. This review focuses on comparing the effects of PEG architecture on the physiochemical and biological properties of the PEGylated oligonucleotide.
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Affiliation(s)
- Xueguang Lu
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, USA
| | - Ke Zhang
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts 02115, USA
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12
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Nashaat D, Elsabahy M, El-Sherif T, Hamad MA, El-Gindy GA, Ibrahim EH. Development and in vivo evaluation of chitosan nanoparticles for the oral delivery of albumin. Pharm Dev Technol 2018; 24:329-337. [PMID: 29781756 DOI: 10.1080/10837450.2018.1479867] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Albumin is used as a plasma expander in critically ill patients and for several other clinical applications mainly via intravenous infusion. Oral administration of albumin can improve patient compliance although limited oral bioavailability of proteins is still a major challenge. Although nanomaterials have been extensively utilized for improving oral delivery of proteins, albumin has been utilized only as either a model drug or as a carrier for drug delivery. In the current study, for the first time, chitosan nanoparticles have been developed and extensively optimized to improve oral bioavailability of albumin as a therapeutic protein. Several characterizations have been performed for the albumin-loaded nanoparticles (e.g. drug encapsulation efficiency, DSC, FTIR, particle size, zeta potential, morphology, release kinetics, and enzymatic stability). Nanosized spherical particles were prepared and demonstrated high stability over three months either in a powdered form or as suspensions. Sustained release of albumin over time and high enzymatic stability as compared to the free albumin were observed. In vivo, higher serum concentrations of albumin in normal rabbits and cirrhotic rats were attained following oral and intraperitoneal administrations of the albumin-loaded nanoparticles as compared to the free albumin. The nanoparticles developed in the current study might provide efficient nanovehicles for oral administration of therapeutic albumin.
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Affiliation(s)
- Dalia Nashaat
- a Department of Pharmaceutics, Faculty of Pharmacy , Assiut University , Assiut , Egypt
| | - Mahmoud Elsabahy
- a Department of Pharmaceutics, Faculty of Pharmacy , Assiut University , Assiut , Egypt.,b Laboratory for Synthetic-Biologic Interactions, Department of Chemistry , Texas A&M University College Station , TX , USA.,c Misr University for Science and Technology , 6th of October City , Egypt
| | - Tahra El-Sherif
- d Department of Clinical Pathology, Faculty of Medicine , Assiut University , Assiut , Egypt
| | - Mostafa A Hamad
- e Department of Surgery, Faculty of Medicine , Assiut University , Assiut , Egypt
| | - Gamal A El-Gindy
- a Department of Pharmaceutics, Faculty of Pharmacy , Assiut University , Assiut , Egypt
| | - Ehsan H Ibrahim
- a Department of Pharmaceutics, Faculty of Pharmacy , Assiut University , Assiut , Egypt
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13
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Borguet Y, Khan S, Noel A, Gunsten SP, Brody SL, Elsabahy M, Wooley KL. Development of Fully Degradable Phosphonium-Functionalized Amphiphilic Diblock Copolymers for Nucleic Acids Delivery. Biomacromolecules 2018; 19:1212-1222. [PMID: 29526096 PMCID: PMC5894060 DOI: 10.1021/acs.biomac.8b00069] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 02/23/2018] [Indexed: 11/29/2022]
Abstract
To expand the range of functional polymer materials to include fully hydrolytically degradable systems that bear bioinspired phosphorus-containing linkages both along the backbone and as cationic side chain moieties for packaging and delivery of nucleic acids, phosphonium-functionalized polyphosphoester- block-poly(l-lactide) copolymers of various compositions were synthesized, fully characterized, and their self-assembly into nanoparticles were studied. First, an alkyne-functionalized polyphosphoester- block-poly(l-lactide) copolymer was synthesized via a one pot sequential ring opening polymerization of an alkyne-functionalized phospholane monomer, followed by the addition of l-lactide to grow the second block. Second, the alkynyl side groups of the polyphosphoester block were functionalized via photoinitiated thiol-yne radical addition of a phosphonium-functionalized free thiol. The polymers of varying phosphonium substitution degrees were self-assembled in aqueous buffers to afford formation of well-defined core-shell assemblies with an average size ranging between 30 and 50 nm, as determined by dynamic light scattering. Intracellular delivery of the nanoparticles and their effects on cell viability and capability at enhancing transfection efficiency of nucleic acids (e.g., siRNA) were investigated. Cell viability assays demonstrated limited toxicity of the assembly to RAW 264.7 mouse macrophages, except at high polymer concentrations, where the polymer of high degree of phosphonium functionalization induced relatively higher cytotoxicity. Transfection efficiency was strongly affected by the phosphonium-to-phosphate (P+/P-) ratios of the polymers and siRNA, respectively. The AllStars Hs Cell Death siRNA complexed to the various copolymers at a P+/P- ratio of 10:1 induced comparable cell death to Lipofectamine. These fully degradable nanoparticles might provide biocompatible nanocarriers for therapeutic nucleic acid delivery.
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Affiliation(s)
- Yannick
P. Borguet
- Departments
of Chemistry, Chemical Engineering, and Materials Science & Engineering,
and the Laboratory for Synthetic-Biologic Interactions, Texas A&M University, College Station, Texas 77842, United States
| | - Sarosh Khan
- Departments
of Chemistry, Chemical Engineering, and Materials Science & Engineering,
and the Laboratory for Synthetic-Biologic Interactions, Texas A&M University, College Station, Texas 77842, United States
| | - Amandine Noel
- Departments
of Chemistry, Chemical Engineering, and Materials Science & Engineering,
and the Laboratory for Synthetic-Biologic Interactions, Texas A&M University, College Station, Texas 77842, United States
| | - Sean P. Gunsten
- Department
of Medicine, Washington University, St. Louis, Missouri 63110, United States
| | - Steven L. Brody
- Department
of Medicine, Washington University, St. Louis, Missouri 63110, United States
- Department
of Radiology, Washington University, St. Louis, Missouri 63110, United States
| | - Mahmoud Elsabahy
- Departments
of Chemistry, Chemical Engineering, and Materials Science & Engineering,
and the Laboratory for Synthetic-Biologic Interactions, Texas A&M University, College Station, Texas 77842, United States
- Department
of Pharmaceutics, Faculty of Pharmacy, Assiut International Center
of Nanomedicine, Alrajhy Liver Hospital, Assiut University, Assiut 71515, Egypt
| | - Karen L. Wooley
- Departments
of Chemistry, Chemical Engineering, and Materials Science & Engineering,
and the Laboratory for Synthetic-Biologic Interactions, Texas A&M University, College Station, Texas 77842, United States
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14
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Nanostructured lipid carriers for improved oral delivery and prolonged antihyperlipidemic effect of simvastatin. Colloids Surf B Biointerfaces 2018; 162:236-245. [DOI: 10.1016/j.colsurfb.2017.11.064] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 11/17/2017] [Accepted: 11/27/2017] [Indexed: 11/17/2022]
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15
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Morsi NG, Ali SM, Elsonbaty SS, Afifi AA, Hamad MA, Gao H, Elsabahy M. Poly(glycerol methacrylate)-based degradable nanoparticles for delivery of small interfering RNA. Pharm Dev Technol 2017; 23:387-399. [PMID: 28347210 DOI: 10.1080/10837450.2017.1312443] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Nucleic acids therapeutic efficiency is generally limited by their low stability and intracellular bioavailability, and by the toxicity of the carriers used to deliver them to the target sites. Aminated poly(glycerol methacrylate) polymers are biodegradable and pH-sensitive polymers that have been used previously to deliver antisense oligonucleotide and show high transfection efficiency. The purpose of this study is to compare the efficiency and toxicity of aminated linear poly(glycerol methacrylate) (ALT) biodegradable polymer to the most commonly used cationic degradable (i.e. chitosan) and non-degradable (i.e. polyethylenimine (PEI)) polymers for delivery of short interfering RNA (siRNA). ALT, PEI and chitosan polymers were able to form nanosized particles with siRNA. Size, size-distribution and zeta-potential were measured over a wide range of nitrogen-to-phosphate (N/P) ratios, and the stability of the formed nanoparticles in saline and upon freeze-drying was also assessed. No significant cytotoxicity at the range of the tested concentrations of ALT and chitosan nanoparticles was observed, whereas the non-degradable PEI showed significant toxicity in huh-7 hepatocyte-derived carcinoma cell line. The safety profiles of the degradable polymers (ALT and chitosan) over non-degradable PEI were demonstrated in vitro and in vivo. In addition, ALT nanoparticles were able to deliver siRNA in vivo with significantly higher efficiency than chitosan nanoparticles. The results in the present study give evidence of the great implications of ALT nanoparticles in biomedical applications due to their biocompatibility, low cytotoxicity, high stability and simple preparation method.
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Affiliation(s)
- Noha G Morsi
- a Assiut International Center of Nanomedicine , Al-Rajhy Liver Hospital, Assiut University , Assiut , Egypt
| | - Shimaa M Ali
- a Assiut International Center of Nanomedicine , Al-Rajhy Liver Hospital, Assiut University , Assiut , Egypt
| | - Sherouk S Elsonbaty
- a Assiut International Center of Nanomedicine , Al-Rajhy Liver Hospital, Assiut University , Assiut , Egypt
| | - Ahmed A Afifi
- a Assiut International Center of Nanomedicine , Al-Rajhy Liver Hospital, Assiut University , Assiut , Egypt
| | - Mostafa A Hamad
- b Department of Surgery, Faculty of Medicine , Assiut University , Assiut , Egypt
| | - Hui Gao
- c School of Chemistry and Chemical Engineering , Tianjin University of Technology , Tianjin , China
| | - Mahmoud Elsabahy
- a Assiut International Center of Nanomedicine , Al-Rajhy Liver Hospital, Assiut University , Assiut , Egypt.,d Laboratory for Synthetic-Biologic Interactions, Department of Chemistry , Texas A&M University , College Station , TX , USA.,e Department of Pharmaceutics, Faculty of Pharmacy , Assiut University , Assiut , Egypt.,f Misr University for Science and Technology , 6th of October City , Egypt
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16
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Mohamed NK, Hamad MA, Hafez MZ, Wooley KL, Elsabahy M. Nanomedicine in management of hepatocellular carcinoma: Challenges and opportunities. Int J Cancer 2016; 140:1475-1484. [DOI: 10.1002/ijc.30517] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 10/30/2016] [Accepted: 11/08/2016] [Indexed: 12/14/2022]
Affiliation(s)
- Nourhan K. Mohamed
- Assiut International Center of Nanomedicine, Al-Rajhy Liver Hospital, Assiut University; Egypt
| | - Mostafa A. Hamad
- Department of Surgery; Faculty of Medicine, Assiut University; Egypt
| | - Mohamed Z.E. Hafez
- Department of Internal Medicine; Faculty of Medicine, Aswan University; Egypt
| | - Karen L. Wooley
- Departments of Chemistry; Chemical Engineering and Materials Science and Engineering, Texas A&M University; College Station TX
- Laboratory for Synthetic-Biologic Interactions; Department of Chemistry, Texas A&M University; College Station TX
| | - Mahmoud Elsabahy
- Assiut International Center of Nanomedicine, Al-Rajhy Liver Hospital, Assiut University; Egypt
- Laboratory for Synthetic-Biologic Interactions; Department of Chemistry, Texas A&M University; College Station TX
- Department of Pharmaceutics; Faculty of Pharmacy, Assiut University; Egypt
- Misr University for Science and Technology; 6th of October City Egypt
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17
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18
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Elsabahy M, Samarajeewa S, Raymond JE, Clark C, Wooley KL. Shell-crosslinked knedel-like nanoparticles induce lower immunotoxicity than their non-crosslinked analogs. J Mater Chem B 2013; 1:10.1039/C3TB20668H. [PMID: 24187610 PMCID: PMC3811931 DOI: 10.1039/c3tb20668h] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2023]
Abstract
The development of stable nanoparticles that can withstand the changing conditions experienced in a biological setting and also be of low toxicity and immunogenicity is of particular importance to address the problems associated with currently utilized nanotechnology-based therapeutics and diagnostics. The use of crosslinked nanoparticles continues to receive special impetus, due to their robust structure and high kinetic stability, and they have recently been shown to induce lower cytotoxicity than their non-crosslinked micellar counterparts. In the current study, poly(acrylamidoethylamine)-block-poly(DL-lactide) (PAEA90-b-PDLLA40) copolymers were synthesized, self-assembled in water to yield nanoscopic polymeric micelles, and the effects of decorating the micellar surface with poly(ethylene glycol) (i.e. PEGylation) and crosslinking the PAEA layer to varying extents on the physicochemical characteristics, cytotoxicity and immunotoxicity of the nanoparticles were studied. Herein, we report for the first time that crosslinking can efficiently reduce the immunotoxicity of polymeric nanomaterials. In addition, increasing the degree of crosslinking further reduced the accessibility of biomolecules to the core of the nanoparticles and decreased their cytotoxicity and immunotoxicity. It is also highlighted that crosslinking can be more efficient than PEGylation in reducing the immunotoxicity of nanomaterials. Shell-crosslinking of block copolymer micelles, therefore, is expected to advance their clinical development beyond the earlier known effects, and to broaden the implications in the field of nanomedicine.
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Affiliation(s)
- Mahmoud Elsabahy
- Department of Chemistry, Department of Chemical Engineering, Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842-3012, United States
- Department of Pharmaceutics, Faculty of Pharmacy, Assiut Clinical Center of Nanomedicine, Al-Rajhy Liver Hospital, Assiut University, Assiut, Egypt
| | - Sandani Samarajeewa
- Department of Chemistry, Department of Chemical Engineering, Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842-3012, United States
| | - Jeffery E. Raymond
- Department of Chemistry, Department of Chemical Engineering, Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842-3012, United States
| | - Corrie Clark
- Department of Chemistry, Department of Chemical Engineering, Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842-3012, United States
| | - Karen L. Wooley
- Department of Chemistry, Department of Chemical Engineering, Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842-3012, United States
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19
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Elsabahy M, Wooley KL. Strategies Toward Well-Defined Polymer Nanoparticles Inspired by Nature: Chemistry versus Versatility. JOURNAL OF POLYMER SCIENCE. PART A, POLYMER CHEMISTRY 2012; 50:1869-1880. [PMID: 25574072 PMCID: PMC4285366 DOI: 10.1002/pola.25955] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Polymeric nanoparticles are promising delivery platforms for various biomedical applications. One of the main challenges toward the development of therapeutic nanoparticles is the premature disassembly and release of the encapsulated drug. Among the different strategies to enhance the kinetic stability of polymeric nanoparticles, shell- and core-crosslinking have been shown to provide robust character, while creating a suitable environment for encapsulation of a wide range of therapeutics, including hydrophilic, hydrophobic, metallic, and small and large biomolecules, with gating of their release as well. The versatility of shell- and core-crosslinked nanoparticles is driven from the ease by which the structures of the shell- and core-forming polymers and crosslinkers can be modified. In addition, postmodification with cell-recognition moieties, grafting of antibiofouling polymers, or chemical degradation of the core to yield nanocages allow the use of these robust nanostructures as "smart" nanocarriers. The building principles of these multifunctional nanoparticles borrow analogy from the synthesis, supramolecular assembly, stabilization, and dynamic activity of the naturally driven biological nanoparticles such as proteins, lipoproteins, and viruses. In this review, the chemistry involved during the buildup from small molecules to polymers to covalently stabilized nanoscopic objects is detailed, with contrast of the strategies of the supramolecular assembly of polymer building blocks followed by intramicellar stabilization into shell-, core-, or core-shell-crosslinked knedel-like nanoparticles versus polymerization of polymers into nanoscopic molecular brushes followed by further intramolecular covalent stabilization events. The rational design of shell-crosslinked knedel-like nanoparticles is then elaborated for therapeutic packaging and delivery, with emphasis on the polymer chemistry aspects to accomplish the synthesis of such nanoparticulate systems.
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Affiliation(s)
- Mahmoud Elsabahy
- Department of Chemistry, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842-3012 ; Department of Chemistry, Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842-3012 ; Department of Pharmaceutics, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Karen L Wooley
- Department of Chemistry, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842-3012 ; Department of Chemistry, Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842-3012 ; Department of Chemical Engineering, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842-3012
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Abstract
Polymeric nanoparticles-based therapeutics show great promise in the treatment of a wide range of diseases, due to the flexibility in which their structures can be modified, with intricate definition over their compositions, structures and properties. Advances in polymerization chemistries and the application of reactive, efficient and orthogonal chemical modification reactions have enabled the engineering of multifunctional polymeric nanoparticles with precise control over the architectures of the individual polymer components, to direct their assembly and subsequent transformations into nanoparticles of selective overall shapes, sizes, internal morphologies, external surface charges and functionalizations. In addition, incorporation of certain functionalities can modulate the responsiveness of these nanostructures to specific stimuli through the use of remote activation. Furthermore, they can be equipped with smart components to allow their delivery beyond certain biological barriers, such as skin, mucus, blood, extracellular matrix, cellular and subcellular organelles. This tutorial review highlights the importance of well-defined chemistries, with detailed ties to specific biological hurdles and opportunities, in the design of nanostructures for various biomedical delivery applications.
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Affiliation(s)
- Mahmoud Elsabahy
- Department of Chemistry, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842-3012, United States
- Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842-3012, United States
- Department of Pharmaceutics, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Karen L. Wooley
- Department of Chemistry, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842-3012, United States
- Department of Chemical Engineering, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842-3012, United States
- Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842-3012, United States
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Bayó-Puxan N, Dufresne MH, Felber AE, Castagner B, Leroux JC. Preparation of polyion complex micelles from poly(ethylene glycol)-block-polyions. J Control Release 2011; 156:118-27. [DOI: 10.1016/j.jconrel.2011.07.027] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Revised: 07/04/2011] [Accepted: 07/18/2011] [Indexed: 11/15/2022]
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22
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Gao H, Elsabahy M, Giger EV, Li D, Prud'homme RE, Leroux JC. Aminated linear and star-shape poly(glycerol methacrylate)s: synthesis and self-assembling properties. Biomacromolecules 2010; 11:889-95. [PMID: 20201490 DOI: 10.1021/bm901241k] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Over the past 10 years, polyglycerols and their structurally related analogs have received considerable attention in the biomedical field. Poly(glycidyl methacrylate) (PGMA) is a versatile polymer because its pendant epoxide groups can be opened with different functional groups to generate poly(glycerol methacrylate)s (PGOHMA) derivatives. In this work, linear and star-shape PGMAs were synthesized by atom transfer radical polymerization and then functionalized with four different amines by ring-opening addition. This resulted in the formation of polyglycerol-like polymers having both hydroxyl and amine moieties and different water-solubility. The water-insoluble polymers could form pH-sensitive nanoassemblies, while the soluble derivatives efficiently complexed a short strand polynucleotide. The aminated polyglycerol interacted more avidly with the oligonucleotide than the control poly(ethyleneimine), and high transfection efficacy could be obtained with the linear derivative. Such polymers could find practical applications for the delivery of drugs and nucleic acids.
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Affiliation(s)
- Hui Gao
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, China
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Voets IK, de Keizer A, Cohen Stuart MA. Complex coacervate core micelles. Adv Colloid Interface Sci 2009; 147-148:300-18. [PMID: 19038373 DOI: 10.1016/j.cis.2008.09.012] [Citation(s) in RCA: 310] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2008] [Revised: 09/15/2008] [Accepted: 09/29/2008] [Indexed: 10/21/2022]
Abstract
In this review we present an overview of the literature on the co-assembly of neutral-ionic block, graft, and random copolymers with oppositely charged species in aqueous solution. Oppositely charged species include synthetic (co)polymers of various architectures, biopolymers - such as proteins, enzymes and DNA - multivalent ions, metallic nanoparticles, low molecular weight surfactants, polyelectrolyte block copolymer micelles, metallo-supramolecular polymers, equilibrium polymers, etcetera. The resultant structures are termed complex coacervate core/polyion complex/block ionomer complex/interpolyelectrolyte complex micelles (or vesicles); i.e., in short C3Ms (or C3Vs) and PIC, BIC or IPEC micelles (and vesicles). Formation, structure, dynamics, properties, and function will be discussed. We focus on experimental work; theory and modelling will not be discussed. Recent developments in applications and micelles with heterogeneous coronas are emphasized.
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Characterization of polyion complex micelles designed to address the challenges of oligonucleotide delivery. Pharm Res 2008; 25:2083-93. [PMID: 18452054 DOI: 10.1007/s11095-008-9591-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2008] [Accepted: 04/03/2008] [Indexed: 10/22/2022]
Abstract
PURPOSE To optimize oligonucleotide (ODN)-based polyion complex micelles (PICMs) by studying the effects of polymer composition and length on their properties. METHODS Atom transfer radical polymerization was used to synthesize copolymers with increasing hydrophilic nonionic and cationic block lengths. PICMs were prepared by mixing the copolymers and ODN at various nitrogen-to-phosphate (N/P) ratios and characterized by gel electrophoresis and dynamic light scattering. The stability of the complexes towards dissociation was tested using a competitive assay with heparin. Finally, protection of the incorporated ODN against DNAse I degradation was evaluated. RESULTS A library of copolymers composed of poly(ethylene glycol) (PEG) and poly(aminoethyl methacrylate) (PAEMA) and/or poly((dimethylamino)ethylmethacrylate) (PDMAEMA) was synthesized. All polymers efficiently interacted with the ODN at N/P ratios approaching 1.5. Narrowly distributed but easily dissociable PICMs were obtained using PEG 5000 and short DMAEMA chains. Shortening the PEG block to 2000, increasing the number of cationic units and using AEMA produced more stable complexes but at the cost of colloidal properties. All polymers were able to protect the ODN from nuclease degradation. CONCLUSIONS PEG 3000-based PICMs possess good colloidal properties, intermediate stability towards dissociation and adjustable buffering capacity, making them potentially useful for the delivery of nucleic acid drugs.
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