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Ben Brahim B, Arenas Hoyos I, Zhang L, Vögelin E, Olariu R, Rieben R. Tacrolimus-loaded Drug Delivery Systems in Vascularized Composite Allotransplantation: Lessons and Opportunities for Local Immunosuppression. Transplantation 2024:00007890-990000000-00769. [PMID: 38773862 DOI: 10.1097/tp.0000000000005049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2024]
Abstract
Long-term systemic immunosuppression is needed for vascularized composite allotransplantation (VCA). The high rate of acute rejection episodes in the first posttransplant year, the development of chronic rejection, and the adverse effects that come along with this treatment, currently prevent a wider clinical application of VCA. Opportunistic infections and metabolic disturbances are among the most observed side effects in VCA recipients. To overcome these challenges, local immunosuppression using biomaterial-based drug delivery systems (DDS) have been developed. The aim of these systems is to provide high local concentrations of immunosuppressive drugs while reducing their systemic load. This review provides a summary of recently investigated local DDS with different mechanisms of action such as on-demand, ultrasound-sensitive, or continuous drug delivery. In preclinical models, ranging from rodent to porcine and nonhuman primate models, this approach has been shown to reduce systemic tacrolimus (TAC) load and adverse effects, while prolonging graft survival. Localized immunosuppression using biomaterial-based DDS represents an encouraging approach to enhance graft survival and reduce toxic side effects of immunosuppressive drugs in VCA patients. Preclinical models using TAC-releasing DDS have demonstrated high local immunosuppressive effects with a low systemic burden. However, to reduce acute rejection events in translational animal models or in the clinical reality, the use of additional low-dose systemic TAC treatment may be envisaged. Patients may benefit through efficient graft immunosuppression and survival with negligible systemic adverse effects, resulting in better compliance and quality of life.
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Affiliation(s)
- Bilal Ben Brahim
- Department for BioMedical Research, University of Bern, Bern, Switzerland
| | - Isabel Arenas Hoyos
- Department for BioMedical Research, University of Bern, Bern, Switzerland
- Department of Plastic and Hand Surgery, Inselspital Bern University Hospital, Bern, Switzerland
| | - Lei Zhang
- Department for BioMedical Research, University of Bern, Bern, Switzerland
- Department of Plastic and Hand Surgery, Inselspital Bern University Hospital, Bern, Switzerland
| | - Esther Vögelin
- Department for BioMedical Research, University of Bern, Bern, Switzerland
- Department of Plastic and Hand Surgery, Inselspital Bern University Hospital, Bern, Switzerland
| | - Radu Olariu
- Department for BioMedical Research, University of Bern, Bern, Switzerland
- Department of Plastic and Hand Surgery, Inselspital Bern University Hospital, Bern, Switzerland
| | - Robert Rieben
- Department for BioMedical Research, University of Bern, Bern, Switzerland
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2
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Zhou L, Godse S, Sinha N, Kodidela S, Singh U, Kumar S. Darunavir Nanoformulation Suppresses HIV Pathogenesis in Macrophages and Improves Drug Delivery to the Brain in Mice. Pharmaceutics 2024; 16:555. [PMID: 38675216 PMCID: PMC11054602 DOI: 10.3390/pharmaceutics16040555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/01/2024] [Accepted: 04/12/2024] [Indexed: 04/28/2024] Open
Abstract
Although antiretroviral therapy (ART) can suppress peripheral HIV, patients still suffer from neuroHIV due to insufficient levels of ART drugs in the brain. Hence, this study focuses on developing a poly lactic-co-glycolic acid (PLGA) nanoparticle-based ART drug delivery system for darunavir (DRV) using an intranasal route that can overcome the limitation of drug metabolic stability and blood-brain barrier (BBB) permeability. The physicochemical properties of PLGA-DRV were characterized. The results indicated that PLGA-DRV formulation inhibits HIV replication in U1 macrophages directly and in the presence of the BBB without inducing cytotoxicity. However, the PLGA-DRV did not inhibit HIV replication more than DRV alone. Notably, the total antioxidant capacity remained unchanged upon treatment with both DRV or PLGA-DRV in U1 cells. Compared to DRV alone, PLGA-DRV further decreased reactive oxygen species, suggesting a decrease in oxidative stress by the formulation. Oxidative stress is generally increased by HIV infection, leading to increased inflammation. Although the PLGA-DRV formulation did not further reduce the inflammatory response, the formulation did not provoke an inflammatory response in HIV-infected U1 macrophages. As expected, in vitro experiments showed higher DRV permeability by PLGA-DRV than DRV alone to U1 macrophages. Importantly, in vivo experiments, especially using intranasal administration of PLGA-DRV in wild-type mice, demonstrated a significant increase in the brain-to-plasma ratio of DRV compared to the free DRV. Overall, findings from this study attest to the potential of the PLGA-DRV nanoformulation in reducing HIV pathogenesis in macrophages and enhancing drug delivery to the brain, offering a promising avenue for treating HIV-related neurological disorders.
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Affiliation(s)
| | | | | | | | | | - Santosh Kumar
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, 881 Madison Ave., Memphis, TN 38163, USA (S.G.); (U.S.)
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3
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Alrbyawi H, Annaji M, Fasina O, Palakurthi S, Boddu SHS, Hassan N, Tiwari AK, Suryawanshi A, Babu RJ. Rapidly Dissolving Trans-scleral Microneedles for Intraocular Delivery of Cyclosporine A. AAPS PharmSciTech 2024; 25:28. [PMID: 38302687 DOI: 10.1208/s12249-024-02738-5] [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: 10/09/2023] [Accepted: 12/27/2023] [Indexed: 02/03/2024] Open
Abstract
Cyclosporine A (CsA) is a cyclic peptide immunosuppressant drug that is beneficial in the treatment of various ocular diseases. However, its ocular bioavailability in the posterior eye is limited due to its poor aqueous solubility. Conventional CsA formulations such as a solution or emulsion permeate poorly across the eye due to various static and dynamic barriers of the eye. Dissolvable microneedle (MN)-based patches can be used to overcome barrier properties and, thus, enhance the ocular bioavailability of CsA in the posterior eye. CsA-loaded dissolvable MN patches were fabricated using polyvinylpyrrolidone (PVP) and characterized for MN uniformity and sharpness using SEM. Further characterization for its failure force, penetration force, and depth of penetration were analyzed using a texture analyzer. Finally, the dissolution time, ex vivo permeation, and ocular distribution of cyclosporine were determined in isolated porcine eyes. PVP MNs were sharp, uniform with good mechanical properties, and dissolved within 5 min. Ocular distribution of CsA in a whole porcine eye perfusion model showed a significant increase of CsA levels in various posterior segment ocular tissues as compared to a topically applied ophthalmic emulsion (Restasis®) (P < 0.001). Dissolving MNs of CsA were prepared, and the MN arrays can deliver CsA to the back of the eye offering potential for treating various inflammatory diseases.
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Affiliation(s)
- Hamad Alrbyawi
- Department of Drug Discovery and Development, Auburn University, Auburn, Alabama, USA
- Pharmaceutics and Pharmaceutical Technology Department, College of Pharmacy, Taibah University, Medina, Saudi Arabia
| | - Manjusha Annaji
- Department of Drug Discovery and Development, Auburn University, Auburn, Alabama, USA
| | - Oladiran Fasina
- Department of Biosystems Engineering, Samuel Ginn College of Engineering, Auburn University, Auburn, Alabama, 36849, USA
| | - Srinath Palakurthi
- Department of Pharmaceutical Sciences, Texas A&M University, Kingsville, Texas, USA
| | - Sai H S Boddu
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Ajman University, Ajman, United Arab Emirates
- Center of Medical and Bio-Allied Health Sciences Research, Ajman University, P.O. Box 346, Ajman, United Arab Emirates
| | - Nageeb Hassan
- Center of Medical and Bio-Allied Health Sciences Research, Ajman University, P.O. Box 346, Ajman, United Arab Emirates.
- Department of Clinical Sciences, College of Pharmacy and Health Sciences, Ajman University, Ajman, United Arab Emirates.
| | - Amit K Tiwari
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas of Medical Sciences, Little Rock, Arkansas, USA
| | - Amol Suryawanshi
- Department of Pathobiology, College of Veterinary Medicine, Auburn University, 240B Greene Hall, Auburn, Alabama, 36849, USA
| | - R Jayachandra Babu
- Department of Drug Discovery and Development, Auburn University, Auburn, Alabama, USA.
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Lo YC, Lin WJ. Improve BBB Penetration and Cytotoxicity of Palbociclib in U87-MG Glioblastoma Cells Delivered by Dual Peptide Functionalized Nanoparticles. Pharmaceutics 2023; 15:2429. [PMID: 37896189 PMCID: PMC10610156 DOI: 10.3390/pharmaceutics15102429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 09/21/2023] [Accepted: 10/04/2023] [Indexed: 10/29/2023] Open
Abstract
Palbociclib (PBC) is an FDA-approved CDK4/6 inhibitor used for breast cancer treatment. PBC has been demonstrated its ability to suppress the proliferation of glioma cells by inducing cell cycle arrest. However, the efflux transporters on the blood-brain barrier (BBB) restricts the delivery of PBC to the brain. The nano-delivery strategy with BBB-penetrating and glioma-targeting abilities was designed. Poly(lactide-co-glycolide)-poly(ethylene glycol) (PLGA-PEG) was functionalized with the potential peptide, T7 targeting peptide and/or R9 penetrating peptide, to prepare PBC-loaded nanoparticles (PBC@NPs). The size of PBC@NPs was in the range of 168.4 ± 4.3-185.8 ± 4.4 nm (PDI < 0.2), and the zeta potential ranged from -17.8 ± 1.4 mV to -14.3 ± 1.0 mV dependent of conjugated peptide. The transport of PBC@NPs across the bEnd.3 cell model was in the order of dual-peptide modified NPs > T7-peptide modified NPs > peptide-free NPs > free PBC, indicating facilitated delivery of PBC by NPs, particularly the T7/R9 dual-peptide modified NPs. Moreover, PBC@NPs significantly enhanced U87-MG glioma cell apoptosis by 2.3-6.5 folds relative to PBC, where the dual-peptide modified NPs was the most effective one. In conclusion, the PBC loaded dual-peptide functionalized NPs improved cellular uptake in bEnd.3 cells followed by targeting to U87-MG glioma cells, leading to effective cytotoxicity and promoting cell death.
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Affiliation(s)
- Yu-Chen Lo
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei 10050, Taiwan;
| | - Wen-Jen Lin
- School of Pharmacy, College of Medicine, National Taiwan University, Taipei 10050, Taiwan;
- Drug Research Center, College of Medicine, National Taiwan University, Taipei 10050, Taiwan
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5
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Kuppan P, Wong J, Kelly S, Lin J, Worton J, Castro C, Paramor J, Seeberger K, Cuesta-Gomez N, Anderson CC, Korbutt GS, Pepper AR. Long-Term Survival and Induction of Operational Tolerance to Murine Islet Allografts by Co-Transplanting Cyclosporine A Microparticles and CTLA4-Ig. Pharmaceutics 2023; 15:2201. [PMID: 37765170 PMCID: PMC10537425 DOI: 10.3390/pharmaceutics15092201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 08/21/2023] [Accepted: 08/23/2023] [Indexed: 09/29/2023] Open
Abstract
One strategy to prevent islet rejection is to create a favorable immune-protective local environment at the transplant site. Herein, we utilize localized cyclosporine A (CsA) delivery to islet grafts via poly(lactic-co-glycolic acid) (PLGA) microparticles to attenuate allograft rejection. CsA-eluting PLGA microparticles were prepared using a single emulsion (oil-in-water) solvent evaporation technique. CsA microparticles alone significantly delayed islet allograft rejection compared to islets alone (p < 0.05). Over 50% (6/11) of recipients receiving CsA microparticles and short-term cytotoxic T lymphocyte-associated antigen 4-Ig (CTLA4-Ig) therapy displayed prolonged allograft survival for 214 days, compared to 25% (2/8) receiving CTLA4-Ig alone. CsA microparticles alone and CsA microparticles + CTLA4-Ig islet allografts exhibited reduced T-cell (CD4+ and CD8+ cells, p < 0.001) and macrophage (CD68+ cells, p < 0.001) infiltration compared to islets alone. We observed the reduced mRNA expression of proinflammatory cytokines (IL-6, IL-10, INF-γ, and TNF-α; p < 0.05) and chemokines (CCL2, CCL5, CCL22, and CXCL10; p < 0.05) in CsA microparticles + CTLA4-Ig allografts compared to islets alone. Long-term islet allografts contained insulin+ and intra-graft FoxP3+ T regulatory cells. The rapid rejection of third-party skin grafts (C3H) in islet allograft recipients suggests that CsA microparticles + CTLA4-Ig therapy induced operational tolerance. This study demonstrates that localized CsA drug delivery plus short-course systemic immunosuppression promotes an immune protective transplant niche for allogeneic islets.
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Affiliation(s)
- Purushothaman Kuppan
- Alberta Diabetes Institute, University of Alberta, Edmonton, AL T6G 2E1, Canada; (P.K.); (J.W.); (S.K.); (J.L.); (J.W.); (C.C.); (J.P.); (K.S.); (N.C.-G.); (C.C.A.)
- Department of Surgery, University of Alberta, Edmonton, AL T6G 2E1, Canada
| | - Jordan Wong
- Alberta Diabetes Institute, University of Alberta, Edmonton, AL T6G 2E1, Canada; (P.K.); (J.W.); (S.K.); (J.L.); (J.W.); (C.C.); (J.P.); (K.S.); (N.C.-G.); (C.C.A.)
- Department of Surgery, University of Alberta, Edmonton, AL T6G 2E1, Canada
| | - Sandra Kelly
- Alberta Diabetes Institute, University of Alberta, Edmonton, AL T6G 2E1, Canada; (P.K.); (J.W.); (S.K.); (J.L.); (J.W.); (C.C.); (J.P.); (K.S.); (N.C.-G.); (C.C.A.)
- Department of Surgery, University of Alberta, Edmonton, AL T6G 2E1, Canada
| | - Jiaxin Lin
- Alberta Diabetes Institute, University of Alberta, Edmonton, AL T6G 2E1, Canada; (P.K.); (J.W.); (S.K.); (J.L.); (J.W.); (C.C.); (J.P.); (K.S.); (N.C.-G.); (C.C.A.)
- Department of Surgery, University of Alberta, Edmonton, AL T6G 2E1, Canada
| | - Jessica Worton
- Alberta Diabetes Institute, University of Alberta, Edmonton, AL T6G 2E1, Canada; (P.K.); (J.W.); (S.K.); (J.L.); (J.W.); (C.C.); (J.P.); (K.S.); (N.C.-G.); (C.C.A.)
- Department of Surgery, University of Alberta, Edmonton, AL T6G 2E1, Canada
| | - Chelsea Castro
- Alberta Diabetes Institute, University of Alberta, Edmonton, AL T6G 2E1, Canada; (P.K.); (J.W.); (S.K.); (J.L.); (J.W.); (C.C.); (J.P.); (K.S.); (N.C.-G.); (C.C.A.)
- Department of Surgery, University of Alberta, Edmonton, AL T6G 2E1, Canada
| | - Joy Paramor
- Alberta Diabetes Institute, University of Alberta, Edmonton, AL T6G 2E1, Canada; (P.K.); (J.W.); (S.K.); (J.L.); (J.W.); (C.C.); (J.P.); (K.S.); (N.C.-G.); (C.C.A.)
- Department of Surgery, University of Alberta, Edmonton, AL T6G 2E1, Canada
| | - Karen Seeberger
- Alberta Diabetes Institute, University of Alberta, Edmonton, AL T6G 2E1, Canada; (P.K.); (J.W.); (S.K.); (J.L.); (J.W.); (C.C.); (J.P.); (K.S.); (N.C.-G.); (C.C.A.)
- Department of Surgery, University of Alberta, Edmonton, AL T6G 2E1, Canada
| | - Nerea Cuesta-Gomez
- Alberta Diabetes Institute, University of Alberta, Edmonton, AL T6G 2E1, Canada; (P.K.); (J.W.); (S.K.); (J.L.); (J.W.); (C.C.); (J.P.); (K.S.); (N.C.-G.); (C.C.A.)
- Department of Surgery, University of Alberta, Edmonton, AL T6G 2E1, Canada
| | - Colin C. Anderson
- Alberta Diabetes Institute, University of Alberta, Edmonton, AL T6G 2E1, Canada; (P.K.); (J.W.); (S.K.); (J.L.); (J.W.); (C.C.); (J.P.); (K.S.); (N.C.-G.); (C.C.A.)
- Department of Surgery, University of Alberta, Edmonton, AL T6G 2E1, Canada
| | - Gregory S. Korbutt
- Alberta Diabetes Institute, University of Alberta, Edmonton, AL T6G 2E1, Canada; (P.K.); (J.W.); (S.K.); (J.L.); (J.W.); (C.C.); (J.P.); (K.S.); (N.C.-G.); (C.C.A.)
- Department of Surgery, University of Alberta, Edmonton, AL T6G 2E1, Canada
| | - Andrew R. Pepper
- Alberta Diabetes Institute, University of Alberta, Edmonton, AL T6G 2E1, Canada; (P.K.); (J.W.); (S.K.); (J.L.); (J.W.); (C.C.); (J.P.); (K.S.); (N.C.-G.); (C.C.A.)
- Department of Surgery, University of Alberta, Edmonton, AL T6G 2E1, Canada
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Pourmadadi M, Mahdi Eshaghi M, Ostovar S, Mohammadi Z, K. Sharma R, Paiva-Santos AC, Rahmani E, Rahdar A, Pandey S. Innovative nanomaterials for cancer diagnosis, imaging, and therapy: Drug deliveryapplications. J Drug Deliv Sci Technol 2023. [DOI: 10.1016/j.jddst.2023.104357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
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7
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Jain S, John A, George CE, Johnson RP. Tyrosine-Derived Polymers as Potential Biomaterials: Synthesis Strategies, Properties, and Applications. Biomacromolecules 2023; 24:531-565. [PMID: 36702743 DOI: 10.1021/acs.biomac.2c01232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Peptide-based polymers are evolving as promising materials for various biomedical applications. Among peptide-based polymers, polytyrosine (PTyr)-based and l-tyrosine (Tyr)-derived polymers are unique, due to their excellent biocompatibility, degradability, and functional as well as engineering properties. To date, different polymerization techniques (ring-opening polymerization, enzymatic polymerization, condensation polymerization, solution-interfacial polymerization, and electropolymerization) have been used to synthesize various PTyr-based and Tyr-derived polymers. Even though the synthesis starts from Tyr, different synthesis routes yield different polymers (polypeptides, polyarylates, polyurethanes, polycarbonates, polyiminocarbonate, and polyphosphates) with unique functional characteristics, and these polymers have been successfully used for various biomedical applications in the past decades. This Review comprehensively describes the synthesis approaches, classification, and properties of various PTyr-based and Tyr-derived polymers employed in drug delivery, tissue engineering, and biosensing applications.
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Affiliation(s)
- Supriya Jain
- Polymer Nanobiomaterial Research Laboratory, Nanoscience and Microfluidics Division, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, Karnataka 575018, India
| | - Alona John
- Polymer Nanobiomaterial Research Laboratory, Nanoscience and Microfluidics Division, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, Karnataka 575018, India
| | - Christina Elizhabeth George
- Polymer Nanobiomaterial Research Laboratory, Nanoscience and Microfluidics Division, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, Karnataka 575018, India
| | - Renjith P Johnson
- Polymer Nanobiomaterial Research Laboratory, Nanoscience and Microfluidics Division, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, Karnataka 575018, India
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8
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Yalgın A, Köse FA, Gökçe EH. The effect of cyclosporine A and co-enzyme Q10 loaded solid lipid nanoparticles on 3D printed human auricular model: Evaluation of cell growth. J Drug Deliv Sci Technol 2023. [DOI: 10.1016/j.jddst.2022.104087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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9
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Trombino S, Poerio T, Curcio F, Piacentini E, Cassano R. Production of α-Tocopherol–Chitosan Nanoparticles by Membrane Emulsification. Molecules 2022; 27:molecules27072319. [PMID: 35408718 PMCID: PMC9000759 DOI: 10.3390/molecules27072319] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 03/31/2022] [Accepted: 04/01/2022] [Indexed: 02/06/2023] Open
Abstract
α-tocopherol (α-T) has the highest biological activity with respect to the other components of vitamin E; however, conventional formulations of tocopherol often fail to provide satisfactory bioavailability due to its hydrophobic characteristics. In this work, α-tocopherol-loaded nanoparticles based on chitosan were produced by membrane emulsification (ME). A new derivative was obtained by the cross-linking reaction between α-T and chitosan (CH) to preserve its biological activity. ME was selected as a method for nanoparticle production because it is recognized as an innovative and sustainable technology for its uniform-particle production with tuned sizes and high encapsulation efficiency (EE%), and its ability to preserve the functional properties of bioactive ingredients operating in mild conditions. The reaction intermediates and the final product were characterized by 1HNMR, Fourier-transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC), while the morphological and dimensional properties of the nanoparticles were analyzed using electronic scanning microscopy (SEM) and dynamic light scattering (DLS). The results demonstrated that ME has high potential for the development of α-tocopherol-loaded nanoparticles with a high degree of uniformity (PDI lower than 0.2), an EE of almost 100% and good mechanical strength, resulting in good candidates for the production of functional nanostructured materials for drug delivery. In addition, the chemical bonding between chitosan and α-tocopherol allowed the preservation of the antioxidant properties of the bioactive molecule, as demonstrated by an enhanced antioxidant property and evaluated through in vitro tests, with respect to the starting materials.
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Affiliation(s)
- Sonia Trombino
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy; (S.T.); (F.C.)
| | - Teresa Poerio
- Institute on Membrane Technology (ITM–CNR), Via Pietro BUCCI, c/o University of Calabria, Cubo 17C, 87036 Rende, Italy;
| | - Federica Curcio
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy; (S.T.); (F.C.)
| | - Emma Piacentini
- Institute on Membrane Technology (ITM–CNR), Via Pietro BUCCI, c/o University of Calabria, Cubo 17C, 87036 Rende, Italy;
- Correspondence: (E.P.); (R.C.)
| | - Roberta Cassano
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende, Italy; (S.T.); (F.C.)
- Correspondence: (E.P.); (R.C.)
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10
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Dave R, Randhawa G, Kim D, Simpson M, Hoare T. Microgels and Nanogels for the Delivery of Poorly Water-Soluble Drugs. Mol Pharm 2022; 19:1704-1721. [PMID: 35319212 DOI: 10.1021/acs.molpharmaceut.1c00967] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
While microgels and nanogels are most commonly used for the delivery of hydrophilic therapeutics, the water-swollen structure, size, deformability, colloidal stability, functionality, and physicochemical tunability of microgels can also offer benefits for addressing many of the barriers of conventional vehicles for the delivery of hydrophobic therapeutics. In this review, we describe approaches for designing microgels with the potential to load and subsequently deliver hydrophobic drugs by creating compartmentalized microgels (e.g., core-shell structures), introducing hydrophobic domains in microgels, leveraging host-guest interactions, and/or applying "smart" environmentally responsive materials with switchable hydrophobicity. In particular, the challenge of promoting hydrophobic drug loading without compromising the inherent advantages of microgels as delivery vehicles and ensuring practically relevant release kinetics from such structures is highlighted, with an eye toward the practical translation of such vehicles to the clinic.
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Affiliation(s)
- Ridhdhi Dave
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
| | - Gurpreet Randhawa
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
| | - Daeun Kim
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
| | - Madeline Simpson
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
| | - Todd Hoare
- Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
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11
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Durgun ME, Kahraman E, Hacıoğlu M, Güngör S, Özsoy Y. Posaconazole micelles for ocular delivery: in vitro permeation, ocular irritation and antifungal activity studies. Drug Deliv Transl Res 2022; 12:662-675. [PMID: 33830458 DOI: 10.1007/s13346-021-00974-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/29/2021] [Indexed: 12/26/2022]
Abstract
Posaconazole (PSC) is a triazole group anti-fungal agent with the widest spectrum. Although there is no commercially available ocular dosage form, its diluted oral suspension preparation (Noxafil®) is used as off-label in topical treatment of severe keratitis and sclerokeratitis in the clinic. However, ocular bioavailability of PSC suspension form is extremely low due to its highly lipophilic character. Thus, there is a clinical need to improve its ocular bioavailability and to develop novel delivery system for the treatment of ocular fungal infections. Herein, we studied ex vivo permeation, penetration, anti-fungal activity, and Hen's Egg Test-Chorioallantoic Membrane (HET-CAM) toxicity tests in order to assess ocular targeting of PSC micelles, which were optimized in our previous study. The results indicated that micellar carrier system increased the permeability of PSC to eye tissues. Micelles showed higher affinity to ocular tissues than that of commercial oral suspension of PSC (Noxafil®). In vitro anti-fungal activity data also confirmed the efficacy of PSC loaded micellar formulations against Candida. albicans strains. The relative safety of the optimized micelles on the ocular tissue was shown with the HET-CAM toxicity test. In conclusion, micellar systems could be a promising strategy for the effective and safe delivery of PSC in the treatment of ocular fungal infections.
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Affiliation(s)
- Meltem Ezgi Durgun
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey.
| | - Emine Kahraman
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey
| | - Mayram Hacıoğlu
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey
| | - Sevgi Güngör
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey
| | - Yıldız Özsoy
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey
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12
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Pandey S, Tripathi P, Gupta A, Yadav JS. A comprehensive review on possibilities of treating psoriasis using dermal cyclosporine. Drug Deliv Transl Res 2021; 12:1541-1555. [PMID: 34550552 DOI: 10.1007/s13346-021-01059-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2021] [Indexed: 11/29/2022]
Abstract
Psoriasis is an autoimmune, chronic proliferative, inflammatory skin disease with high comorbidity. Psoriasis is not a curable disease; it can only be managed. Cyclosporine A (CyA) is one of the FDA-approved immunosuppressant drug used in severe Psoriasis. Till date only oral route is used for its administration. Administration of CyA by this route causes serious side effects such as hypertension and renal toxicity. Due to these side effects, a number of researches have been done and taking place in the current times for the dermal delivery of CyA for the management of psoriasis. Dermal delivery of CyA is not an easy task because of its physiochemical properties like high molecular weight, lipophilicity and resistance offered by stratum corneum (SC). Because of the above problems in the dermal delivery a number of new approaches such as nanolipid carriers, microemulsion, liposomes, niosomes etc. are explored. To those deep findings for psoriasis management with dermal delivery of CyA have not been discussed. This comprehensive review includes all the studies, advancements and their critical findings which took place in the recent times for the dermal delivery of CyA and along with the suitable modification needed for the efficient dermal delivery of CyA are also suggested.
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Affiliation(s)
- Sonia Pandey
- Sakshi College of Pharmacy, Kalyanpur, UP, 208017, Kanpur, India.
| | - Purnima Tripathi
- Department of Pharmaceutics, Bundelkhand University, Jhansi, UP, India
| | - Arti Gupta
- Department of Pharmacy, Institute of Technology and Management, Gorakhpur, UP, 273209, India
| | - Jitendra Singh Yadav
- Department of Pharmacy, Institute of Technology and Management, Gorakhpur, UP, 273209, India
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13
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Lanier OL, Manfre M, Kulkarni S, Bailey C, Chauhan A. Combining modeling of drug uptake and release of cyclosporine in contact lenses to determine partition coefficient and diffusivity. Eur J Pharm Sci 2021; 164:105891. [PMID: 34051298 DOI: 10.1016/j.ejps.2021.105891] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/19/2021] [Accepted: 05/24/2021] [Indexed: 11/19/2022]
Abstract
Ophthalmic drug delivery via eye drops is inefficient because only about 1-5% of the drug permeates the cornea during the short residence time of a few minutes. Contact lenses are receiving considerable attention for delivering ophthalmic drugs because of higher bioavailability and the possibility of sustained release from hour to days, and possibly longer. The drug release durations from contact lenses are typically measured in vitro and it is challenging to relate the in vitro release to in vivo release, particularly for hydrophobic drugs which may not exhibit sink release in vitro and in vivo. The in vitro release can be fitted to diffusion equation to determine the partition coefficient and diffusivity, which can then be utilized to model in vivo release. The Higuchi equation is frequently used to model the short time release from a contact lens to determine diffusivity with the implicit assumption that the release is under sink conditions and the starting concentration in the lens was uniform. Both conditions may be violated when measuring release of hydrophobic drugs from contact lenses because the diffusivity and partition coefficient, and also the time needed for equilibrium are not known a priori. Here we develop a method to use the data for both loading and release of cyclosporine, which is a common hydrophobic ophthalmic drug, to determine the partition coefficient and diffusivity. The proposed approach does not require sink conditions and also does not require the lens to be fully equilibrated during loading, which may take almost a month for lenses considered here. The model is based on solving the diffusion equation in the gel along with a mass balance in the fluid. The model equations are solved numerically by finite difference. When the value of partition coefficient is high, such as it is for cyclosporine, the dynamic data is only sensitive to a ratio of partition coefficient and diffusivity, and this ratio had to first be determined from the loading data. Then the two unknown parameters were obtained by minimizing the error between the model prediction and experimental data. The method was used to determine D and K for several silicone hydrogel formulations with varying ratio of hydrogel and silicone fractions.
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Affiliation(s)
- Olivia L Lanier
- Chemical and Biological Engineering Department, Colorado School of Mines, Golden, CO 80401, United States
| | - Miranda Manfre
- Chemical and Biological Engineering Department, Colorado School of Mines, Golden, CO 80401, United States
| | - Sandesh Kulkarni
- Chemical and Biological Engineering Department, Colorado School of Mines, Golden, CO 80401, United States
| | - Claire Bailey
- Chemical and Biological Engineering Department, Colorado School of Mines, Golden, CO 80401, United States
| | - Anuj Chauhan
- Chemical and Biological Engineering Department, Colorado School of Mines, Golden, CO 80401, United States.
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14
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Gendron A, Lan Linh Tran N, Laloy J, Brusini R, Rachet A, Gobeaux F, Nicolas V, Chaminade P, Abreu S, Desmaële D, Varna M. New Nanoparticle Formulation for Cyclosporin A: In Vitro Assessment. Pharmaceutics 2021; 13:pharmaceutics13010091. [PMID: 33445646 PMCID: PMC7828155 DOI: 10.3390/pharmaceutics13010091] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/07/2021] [Accepted: 01/08/2021] [Indexed: 01/02/2023] Open
Abstract
Cyclosporin A (CsA) is a molecule with well-known immunosuppressive properties. As it also acts on the opening of mitochondrial permeability transition pore (mPTP), CsA has been evaluated for ischemic heart diseases (IHD). However, its distribution throughout the body and its physicochemical characteristics strongly limit the use of CsA for intravenous administration. In this context, nanoparticles (NPs) have emerged as an opportunity to circumvent the above-mentioned limitations. We have developed in our laboratory an innovative nanoformulation based on the covalent bond between squalene (Sq) and cyclosporin A to avoid burst release phenomena and increase drug loading. After a thorough characterization of the bioconjugate, we proceeded with a nanoprecipitation in aqueous medium in order to obtain SqCsA NPs of well-defined size. The SqCsA NPs were further characterized using dynamic light scattering (DLS), cryogenic transmission electron microscopy (cryoTEM), and high-performance liquid chromatography (HPLC), and their cytotoxicity was evaluated. As the goal is to employ them for IHD, we evaluated the cardioprotective capacity on two cardiac cell lines. A strong cardioprotective effect was observed on cardiomyoblasts subjected to experimental hypoxia/reoxygenation. Further research is needed in order to understand the mechanisms of action of SqCsA NPs in cells. This new formulation of CsA could pave the way for possible medical application.
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Affiliation(s)
- Amandine Gendron
- Institut Galien Paris-Saclay, Université Paris-Saclay, CNRS UMR 8612, 92296 Châtenay-Malabry, France; (A.G.); (N.L.L.T.); (R.B.); (A.R.); (D.D.)
| | - Natalie Lan Linh Tran
- Institut Galien Paris-Saclay, Université Paris-Saclay, CNRS UMR 8612, 92296 Châtenay-Malabry, France; (A.G.); (N.L.L.T.); (R.B.); (A.R.); (D.D.)
- Namur Nanosafety Centre, Department of Pharmacy, Namur Research Institute for Life Sciences (NARILIS), University of Namur (UNamur), 5000 Namur, Belgium;
| | - Julie Laloy
- Namur Nanosafety Centre, Department of Pharmacy, Namur Research Institute for Life Sciences (NARILIS), University of Namur (UNamur), 5000 Namur, Belgium;
| | - Romain Brusini
- Institut Galien Paris-Saclay, Université Paris-Saclay, CNRS UMR 8612, 92296 Châtenay-Malabry, France; (A.G.); (N.L.L.T.); (R.B.); (A.R.); (D.D.)
| | - Aurélie Rachet
- Institut Galien Paris-Saclay, Université Paris-Saclay, CNRS UMR 8612, 92296 Châtenay-Malabry, France; (A.G.); (N.L.L.T.); (R.B.); (A.R.); (D.D.)
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, 91198 Gif-sur-Yvette, France
| | - Frédéric Gobeaux
- CEA, CNRS, NIMBE, Université Paris-Saclay, CEA-Saclay, 91191 Gif sur Yvette, France;
| | - Valérie Nicolas
- Ingénierie et Plateformes au Service de l’Innovation (IPSIT), UMS IPSIT Université Paris-Saclay—US 31 INSERM—UMS 3679 CNRS, Plate-forme d’imagerie cellulaire MIPSIT, 92290 Châtenay-Malabry, France;
| | - Pierre Chaminade
- Lipides: Systèmes Analytiques et Biologiques, Université Paris-Saclay, 92296 Châtenay-Malabry, France; (P.C.); (S.A.)
| | - Sonia Abreu
- Lipides: Systèmes Analytiques et Biologiques, Université Paris-Saclay, 92296 Châtenay-Malabry, France; (P.C.); (S.A.)
| | - Didier Desmaële
- Institut Galien Paris-Saclay, Université Paris-Saclay, CNRS UMR 8612, 92296 Châtenay-Malabry, France; (A.G.); (N.L.L.T.); (R.B.); (A.R.); (D.D.)
| | - Mariana Varna
- Institut Galien Paris-Saclay, Université Paris-Saclay, CNRS UMR 8612, 92296 Châtenay-Malabry, France; (A.G.); (N.L.L.T.); (R.B.); (A.R.); (D.D.)
- Correspondence: ; Tel.: +33-0146835721
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15
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Velluto D, Bojadzic D, De Toni T, Buchwald P, Tomei AA. Drug-Integrating Amphiphilic Nanomaterial Assemblies: 1. Spatiotemporal control of cyclosporine delivery and activity using nanomicelles and nanofibrils. J Control Release 2021; 329:955-970. [PMID: 33086102 PMCID: PMC7904645 DOI: 10.1016/j.jconrel.2020.10.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 10/12/2020] [Accepted: 10/15/2020] [Indexed: 12/13/2022]
Abstract
Immunomodulatory therapies are limited by unavoidable side effects as well as poor solubility, stability, and pharmacokinetic properties. Nanomaterial-based drug delivery may overcome these limitations by increasing drug solubility, site-targeting, and duration of action. Here, we prepared innovative drug-integrating amphiphilic nanomaterial assemblies (DIANA) with tunable hydrophobicity, size, and morphology, and we evaluated their ability to deliver cyclosporine A (CsA) for immunomodulatory applications. We synthesized amphiphilic block copolymers made of poly(ethylene glycol)-poly(propylene sulfide) (PEG-PPS) and poly(ethylene glycol)-oligo(ethylene sulfide) (PEG-OES) that can self-assemble into solid core nanomicelles (nMIC, with ≈20 nm diameter) and nanofibrils (nFIB, with ≈5 nm diameter and > 500 nm length), respectively. nMIC and nFIB displayed good CsA encapsulation efficiency (up to 4.5 and 2 mg/mL, respectively in aqueous solution), superior to many other solubilization methods, and provided sustained release (>14 and > 7 days for the nMIC and nFIB) without compromising CsA's pharmacological activity. Treatment of insulin-secreting cells with unloaded DIANAs did not impair cell viability and functionality. Both CsA-loaded DIANAs inhibited the proliferation and activation of insulin-reactive cytotoxic T cells in vitro. Subcutaneous injections of CsA-loaded DIANAs in mice provided CsA sustained release, decreasing alloantigen-induced immune responses in the draining lymph node at lower doses and reduced administration frequency than unformulated CsA. While nMIC solubilized higher amounts and provided more sustained release of CsA in vitro, nFIB enhanced cellular uptake and promoted local retention due to slower trafficking in vivo. DIANAs provide a versatile platform for a local immune suppression regimen that can be applied to allogeneic cell transplantation.
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Affiliation(s)
- Diana Velluto
- Diabetes Research Institute, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Damir Bojadzic
- Diabetes Research Institute, Miller School of Medicine, University of Miami, Miami, FL, USA; Department of Molecular and Cellular Pharmacology, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Teresa De Toni
- Diabetes Research Institute, Miller School of Medicine, University of Miami, Miami, FL, USA; Department of Biomedical Engineering, University of Miami, Miami, FL, USA
| | - Peter Buchwald
- Diabetes Research Institute, Miller School of Medicine, University of Miami, Miami, FL, USA; Department of Molecular and Cellular Pharmacology, Miller School of Medicine, University of Miami, Miami, FL, USA.
| | - Alice A Tomei
- Diabetes Research Institute, Miller School of Medicine, University of Miami, Miami, FL, USA; Department of Biomedical Engineering, University of Miami, Miami, FL, USA; Department of Microbiology and Immunology, Miller School of Medicine, University of Miami, Miami, FL, USA; Department of Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA.
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16
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Jebbawi R, Fruchon S, Turrin CO, Blanzat M, Poupot R. Supramolecular and Macromolecular Matrix Nanocarriers for Drug Delivery in Inflammation-Associated Skin Diseases. Pharmaceutics 2020; 12:E1224. [PMID: 33348690 PMCID: PMC7766653 DOI: 10.3390/pharmaceutics12121224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/07/2020] [Accepted: 12/14/2020] [Indexed: 11/26/2022] Open
Abstract
Skin is our biggest organ. It interfaces our body with its environment. It is an efficient barrier to control the loss of water, the regulation of temperature, and infections by skin-resident and environmental pathogens. The barrier function of the skin is played by the stratum corneum (SC). It is a lipid barrier associating corneocytes (the terminally differentiated keratinocytes) and multilamellar lipid bilayers. This intricate association constitutes a very cohesive system, fully adapted to its role. One consequence of this efficient organization is the virtual impossibility for active pharmaceutical ingredients (API) to cross the SC to reach the inner layers of the skin after topical deposition. There are several ways to help a drug to cross the SC. Physical methods and chemical enhancers of permeation are a possibility. These are invasive and irritating methods. Vectorization of the drugs through nanocarriers is another way to circumvent the SC. This mini-review focuses on supramolecular and macromolecular matrices designed and implemented for skin permeation, excluding vesicular nanocarriers. Examples highlight the entrapment of anti-inflammatory API to treat inflammatory disorders of the skin.
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Affiliation(s)
- Ranime Jebbawi
- INSERM, U1043, CNRS, U5282, UPS, Centre de Physiopathologie de Toulouse-Purpan, Université de Toulouse, F-31300 Toulouse, France; (R.J.); (S.F.)
- CNRS, UMR 5623, UPS, Laboratoire des Interactions Moléculaires et Réactivité Chimique et Photochimique, IMRCP, 118 Route de Narbonne, Université de Toulouse, CEDEX 9, F-31062 Toulouse, France;
| | - Séverine Fruchon
- INSERM, U1043, CNRS, U5282, UPS, Centre de Physiopathologie de Toulouse-Purpan, Université de Toulouse, F-31300 Toulouse, France; (R.J.); (S.F.)
| | - Cédric-Olivier Turrin
- CNRS, UPR 8241, Laboratoire de Chimie de Coordination, 205 Route de Narbonne, BP 44099, CEDEX 4, F-31077 Toulouse, France;
- LCC-CNRS, Université de Toulouse, CNRS, 31400 Toulouse, France
| | - Muriel Blanzat
- CNRS, UMR 5623, UPS, Laboratoire des Interactions Moléculaires et Réactivité Chimique et Photochimique, IMRCP, 118 Route de Narbonne, Université de Toulouse, CEDEX 9, F-31062 Toulouse, France;
| | - Rémy Poupot
- INSERM, U1043, CNRS, U5282, UPS, Centre de Physiopathologie de Toulouse-Purpan, Université de Toulouse, F-31300 Toulouse, France; (R.J.); (S.F.)
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17
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Dong Y, Hengst L, Hunt R, Feng X, Kozak D, Choi S, Ashraf M, Xu X. Evaluating drug distribution and release in ophthalmic emulsions: Impact of release conditions. J Control Release 2020; 327:360-370. [PMID: 32822741 DOI: 10.1016/j.jconrel.2020.08.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 07/22/2020] [Accepted: 08/14/2020] [Indexed: 12/21/2022]
Abstract
The purpose of this study is to investigate the process of drug distribution and mechanism of drug release of ophthalmic emulsions in the context of factors associated with the drug release. Cyclosporine and difluprednate emulsions were chosen as model systems. A kinetic method was used to quantitatively evaluate the drug distribution within a simplified biphasic (emulsion) system. The impacts of release associated factors were investigated, including the amount of sodium dodecyl sulfate (SDS), ethanol, and ionic strength in the release medium as well as the temperature. SDS and ethanol were found to significantly enhance both rate and extent of drug diffusion from oil to aqueous phase for both cyclosporine and difluprednate emulsions. The ionic strength was found to decrease the rate and extent of cyclosporine transfer from oil to aqueous phase but had little impact on the transfer of difluprednate between phases. Diffusion of cyclosporine to aqueous phase exhibited a decreasing trend with increasing temperature due to its atypical temperature dependent solubility in water. Based on our previous method to investigate the impact of formulation variables on drug diffusion and the findings in the current study, a biphasic release model for emulsions is proposed and discussed. Lastly, the underlying relationship of three key quality attributes (i.e., globule size distribution, drug distribution, and release characteristics) and their effect on product quality and performance were discussed. This study provides a fundamental insight into the drug distribution and release in complex emulsion systems. It also elucidates the critical variables for the development of in vitro release method to support regulatory assessment of ophthalmic emulsions and formulation development.
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Affiliation(s)
- Yixuan Dong
- Division of Product Quality Research, Office of Testing and Research, Office of Pharmaceutical Quality, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD 20993, USA
| | - Leanna Hengst
- Division of Product Quality Research, Office of Testing and Research, Office of Pharmaceutical Quality, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD 20993, USA
| | - Robert Hunt
- Division of Product Quality Research, Office of Testing and Research, Office of Pharmaceutical Quality, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD 20993, USA
| | - Xin Feng
- Division of Product Quality Research, Office of Testing and Research, Office of Pharmaceutical Quality, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD 20993, USA
| | - Darby Kozak
- Office of Research and Standards, Office of Generic Drugs, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD 20993, USA
| | - Stephanie Choi
- Office of Research and Standards, Office of Generic Drugs, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD 20993, USA
| | - Muhammad Ashraf
- Division of Product Quality Research, Office of Testing and Research, Office of Pharmaceutical Quality, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD 20993, USA
| | - Xiaoming Xu
- Division of Product Quality Research, Office of Testing and Research, Office of Pharmaceutical Quality, Center for Drug Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD 20993, USA.
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18
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Abdel-Bar HM, Khater SE, Ghorab DM, Al-mahallawi AM. Hexosomes as Efficient Platforms for Possible Fluoxetine Hydrochloride Repurposing with Improved Cytotoxicity against HepG2 Cells. ACS OMEGA 2020; 5:26697-26709. [PMID: 33110996 PMCID: PMC7581272 DOI: 10.1021/acsomega.0c03569] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Accepted: 09/24/2020] [Indexed: 05/15/2023]
Abstract
The aim of this study was to investigate the feasibility of hexosomes (HEXs) as competent platforms for fluoxetine hydrochloride (FH) repurposing against HepG2 hepatocellular carcinoma. Different FH-loaded HEX formulations were prepared and optimized by the hot emulsification method. The HEX features such as particle size, ζ potential, and drug entrapment efficiency (EE%) can be tailored by tuning HEX components and fabrication conditions. The composition of the optimized FH hexosome (OFH-HEX) was composed of 3.1, 1.4, 0.5, 0.2, and 94.8% for glyceryl monooleate, oleic acid, pluronic F127, FH, and deionized water, respectively. The anionic OFH-HEX with a particle size of 145.5 ± 2.5 nm and drug EE% of 45.4 ± 1.2% was able to prolong the in vitro FH release, where only 19.5 ± 2.3% released in phosphate-buffered saline (PBS) pH 7.4 after 24 h. Contrarily, HEX rapidly released FH in acetate buffer pH 5.5 and achieved a 90.5 ± 4.7% release after 24 h. The obtained HEX showed an improved cellular internalization in a time-dependent manner and enhanced the cytotoxicity (2-fold higher than FH solution). The current study suggests the potential of FH-HEX as a possible anticancer agent against hepatocellular carcinoma.
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Affiliation(s)
- Hend Mohamed Abdel-Bar
- Department
of Pharmaceutics, Faculty of Pharmacy, University
of Sadat City, 32958 Sadat City, Egypt
| | - Shaymaa Elsayed Khater
- Department
of Pharmaceutics, Faculty of Pharmacy, University
of Sadat City, 32958 Sadat City, Egypt
| | - Dalia Mahmoud Ghorab
- Department
of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, 11562 Cairo, Egypt
| | - Abdulaziz Mohsen Al-mahallawi
- Department
of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, 11562 Cairo, Egypt
- Department
of Pharmaceutics, Faculty of Pharmacy, October
University for Modern Sciences and Arts (MSA), 12451 Giza, Egypt
- . Tel: +201008226524
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19
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Chakhalian D, Shultz RB, Miles CE, Kohn J. Opportunities for biomaterials to address the challenges of COVID-19. J Biomed Mater Res A 2020; 108:1974-1990. [PMID: 32662571 PMCID: PMC7405498 DOI: 10.1002/jbm.a.37059] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 07/10/2020] [Indexed: 12/19/2022]
Abstract
The coronavirus disease 2019 (COVID‐19) pandemic has revealed major shortcomings in our ability to mitigate transmission of infectious viral disease and provide treatment to patients, resulting in a public health crisis. Within months of the first reported case in China, the virus has spread worldwide at an unprecedented rate. COVID‐19 illustrates that the biomaterials community was engaged in significant research efforts against bacteria and fungi with relatively little effort devoted to viruses. Accordingly, biomaterials scientists and engineers will have to participate in multidisciplinary antiviral research over the coming years. Although tissue engineering and regenerative medicine have historically dominated the field of biomaterials, current research holds promise for providing transformative solutions to viral outbreaks. To facilitate collaboration, it is imperative to establish a mutual language and adequate understanding between clinicians, industry partners, and research scientists. In this article, clinical perspectives are shared to clearly define emerging healthcare needs that can be met by biomaterials solutions. Strategies and opportunities for novel biomaterials intervention spanning diagnostics, treatment strategies, vaccines, and virus‐deactivating surface coatings are discussed. Ultimately this review serves as a call for the biomaterials community to become a leading contributor to the prevention and management of the current and future viral outbreaks.
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Affiliation(s)
- Daniel Chakhalian
- Department of Chemistry and Chemical Biology, Rutgers - The State University of New Jersey, Piscataway, New Jersey, USA
| | - Robert B Shultz
- Department of Chemistry and Chemical Biology, Rutgers - The State University of New Jersey, Piscataway, New Jersey, USA.,Department of Neurosurgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA.,Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Catherine E Miles
- Department of Chemistry and Chemical Biology, Rutgers - The State University of New Jersey, Piscataway, New Jersey, USA
| | - Joachim Kohn
- Department of Chemistry and Chemical Biology, Rutgers - The State University of New Jersey, Piscataway, New Jersey, USA
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20
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Tsubone TM, Zhang Z, Goyal R, Santacruz C, Martins WK, Kohn J, Baptista MS. Porphyrin-Loaded TyroSpheres for the Intracellular Delivery of Drugs and Photoinduced Oxidant Species. Mol Pharm 2020; 17:2911-2924. [DOI: 10.1021/acs.molpharmaceut.0c00338] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Tayana Mazin Tsubone
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo 05508-900, Brazil
| | - Zheng Zhang
- New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854-8009, United States
| | - Ritu Goyal
- New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854-8009, United States
| | - Carolina Santacruz
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo 05508-900, Brazil
| | | | - Joachim Kohn
- New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854-8009, United States
| | - Mauricio S. Baptista
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo 05508-900, Brazil
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21
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Freeze-Dried Softisan ® 649-Based Lipid Nanoparticles for Enhanced Skin Delivery of Cyclosporine A. NANOMATERIALS 2020; 10:nano10050986. [PMID: 32455668 PMCID: PMC7279451 DOI: 10.3390/nano10050986] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 05/18/2020] [Accepted: 05/19/2020] [Indexed: 12/11/2022]
Abstract
Inflammatory skin diseases, including psoriasis and atopic dermatitis, affect around one quarter to one third of the world population. Systemic cyclosporine A, an immunosuppressant agent, is included in the current therapeutic armamentarium of these diseases. Despite being highly effective, it is associated with several side effects, and its topical administration is limited by its high molecular weight and poor water solubility. To overcome these limitations, cyclosporine A was incorporated into solid lipid nanoparticles obtained from Softisan® 649, a commonly used cosmetic ingredient, aiming to develop a vehicle for application to the skin. The nanoparticles presented sizes of around 200 nm, low polydispersity, negative surface charge, and stability when stored for 8 weeks at room temperature or 4 °C. An effective incorporation of 88% of cyclosporine A within the nanoparticles was observed, without affecting its morphology. After the freeze-drying process, the Softisan® 649-based nanoparticles formed an oleogel. Skin permeation studies using pig ear as a model revealed low permeation of the applied cyclosporine A in the freeze-dried form of the nanoparticles in relation to free drug and the freshly prepared nanoparticles. About 1.0 mg of cyclosporine A was delivered to the skin with reduced transdermal permeation. These results confirm local delivery of cyclosporine A, indicating its promising topical administration.
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22
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Pandey P, Satija S, Wadhwa R, Mehta M, Purohit D, Gupta G, Prasher P, Chellappan DK, Awasthi R, Dureja H, Dua K. Emerging trends in nanomedicine for topical delivery in skin disorders: Current and translational approaches. Dermatol Ther 2020; 33:e13292. [DOI: 10.1111/dth.13292] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 02/12/2020] [Accepted: 02/26/2020] [Indexed: 12/27/2022]
Affiliation(s)
- Parijat Pandey
- Shri Baba Mastnath Institute of Pharmaceutical Sciences and Research Baba Mastnath University Rohtak Haryana India
| | - Saurabh Satija
- School of Pharmaceutical Sciences Lovely Professional University Phagwara Punjab India
| | - Ridhima Wadhwa
- Faculty of Life Science and Biotechnology South Asian University Akbar Bhawan, Chanakyapuri New Delhi India
- Discipline of Pharmacy, Graduate School of Health University of Technology Sydney Sydney Australia
| | - Meenu Mehta
- School of Pharmaceutical Sciences Lovely Professional University Phagwara Punjab India
- Discipline of Pharmacy, Graduate School of Health University of Technology Sydney Sydney Australia
- Centre for Inflammation Centenary Institute Sydney New South Wales Australia
| | - Deepika Purohit
- Department of Pharmaceutical Sciences Indira Gandhi University Rewari Haryana India
| | - Gaurav Gupta
- School of Pharmaceutical Sciences Jaipur National University Jaipur Rajasthan India
| | - Parteek Prasher
- Department of Chemistry University of Petroleum and Energy Studies Dehradun India
| | - Dinesh K. Chellappan
- Departmental Sciences, School of Pharmacy International Medical University Kuala Lumpur Malaysia
| | - Rajendra Awasthi
- Amity Institute of Pharmacy Amity University Uttar Pradesh Noida Uttar Pradesh India
| | - Harish Dureja
- Department of Pharmaceutical Sciences Maharshi Dayanand University Rohtak Haryana India
| | - Kamal Dua
- Discipline of Pharmacy, Graduate School of Health University of Technology Sydney Sydney Australia
- Centre for Inflammation Centenary Institute Sydney New South Wales Australia
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute (HMRI) and School of Biomedical Sciences and Pharmacy, The University of Newcastle (UoN) Callaghan New South Wales Australia
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23
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Terreni E, Chetoni P, Tampucci S, Burgalassi S, Al-kinani AA, Alany RG, Monti D. Assembling Surfactants-Mucoadhesive Polymer Nanomicelles (ASMP-Nano) for Ocular Delivery of Cyclosporine-A. Pharmaceutics 2020; 12:E253. [PMID: 32168973 PMCID: PMC7150936 DOI: 10.3390/pharmaceutics12030253] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 03/06/2020] [Accepted: 03/09/2020] [Indexed: 02/06/2023] Open
Abstract
The physiological protective mechanisms of the eye reduce the bioavailability of topically administered drugs above all for those with high molecular weight and /or lipophilic characteristics, such as Cyclosporine A (CyA). The combined strategy based on the association of nanomicelles and mucoadhesive polymer seems promising since a limited number of commercial products containing CyA have been recently approved. The scope of this investigation was the design of Assembling Surfactants-Mucoadhesive Polymer Nanomicelles (ASMP-Nano), based on a binary system of two surfactants in combination with hyaluronic acid, and their biopharmaceutical evaluation. The optimisation of the ASMP-Nano in term of the amount of surfactants, CyA-loading and size determined the selection of the clear and stable Nano1HAB-CyA formulation containing 0.105% w/w CyA loaded-nanomicelles with a size of 14.41 nm. The nanostructured system had a protective effect towards epithelial corneal cells with a cell viability of more than 80%. It interacted with cellular barriers favouring the uptake and the accumulation of CyA into the cells as evidenced by fluorescent probe distribution, by hindering CyA permeation through reconstituted corneal epithelial tissue. In pharmacokinetics study on rabbits, the nanomicellar carrier prolonged the CyA retention time in the precorneal area mainly in presence of hyaluronic acid (HA), a mucoadhesive polymer.
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Affiliation(s)
- Eleonora Terreni
- Department of Pharmacy, University of Pisa, 56126 Pisa, Italy; (E.T.); (P.C.); (S.T.); (S.B.)
| | - Patrizia Chetoni
- Department of Pharmacy, University of Pisa, 56126 Pisa, Italy; (E.T.); (P.C.); (S.T.); (S.B.)
- Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), 56126 Pisa, Italy
| | - Silvia Tampucci
- Department of Pharmacy, University of Pisa, 56126 Pisa, Italy; (E.T.); (P.C.); (S.T.); (S.B.)
- Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), 56126 Pisa, Italy
| | - Susi Burgalassi
- Department of Pharmacy, University of Pisa, 56126 Pisa, Italy; (E.T.); (P.C.); (S.T.); (S.B.)
- Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), 56126 Pisa, Italy
| | - Ali Athab Al-kinani
- Drug Discovery, Delivery and Patient Care (DDDPC) Theme, School of Life Sciences, Pharmacy and Chemistry, Kingston University London, Kingston upon Thames, London KT1 2EE, UK; (A.A.A.-k.); (R.G.A.)
| | - Raid G. Alany
- Drug Discovery, Delivery and Patient Care (DDDPC) Theme, School of Life Sciences, Pharmacy and Chemistry, Kingston University London, Kingston upon Thames, London KT1 2EE, UK; (A.A.A.-k.); (R.G.A.)
- School of Pharmacy, The University of Auckland, Auckland 1010, New Zealand
| | - Daniela Monti
- Department of Pharmacy, University of Pisa, 56126 Pisa, Italy; (E.T.); (P.C.); (S.T.); (S.B.)
- Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), 56126 Pisa, Italy
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24
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Patel A, Lima MRN, Cho HY, Lee KB, Murthy NS, Kohn J. Disassembly of Nanospheres with a PEG Shell upon Adsorption onto PEGylated Substrates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:232-241. [PMID: 31825622 DOI: 10.1021/acs.langmuir.9b03042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Polymeric nanospheres have the ability to encapsulate drugs and are therefore widely used in drug delivery applications. Structural transformations that affect drug release from nanospheres are governed by the surrounding environment. To understand these effects, we investigated the adsorption behavior of three types of nanospheres onto model surfaces using quartz crystal microbalance with dissipation (QCM-D) and by atomic force microscopy (AFM). Substrates were prepared from polymers with different degrees of PEGylation (0, 1, and 15%). Nanospheres were prepared via self-assembly of block copolymers. Tyrosine-derived nanospheres are A-B-A triblock copolymers with methoxy poly(ethylene glycol) (PEG) as the A-blocks and an alternating copolymer of desaminotyrosyl-tyrosine octyl ester and suberic acid oligo(DTO-SA) as the B-block. On non-PEGylated substrates, these nanospheres assembled into a close-packed structure; on PEGylated substrates, the adsorbed nanospheres formed a continuous film, thinner than the size of the nanospheres suggesting unraveling of the PEG corona and disassembly of the nanospheres. Also, the adsorption was concentration-dependent, the final thickness being attained at exponentially longer times at lower concentrations. Such substrate- and concentration-dependent behavior was not observed with Pluronic F-127 and PEG-poly(caprolactone) (PCL) nanospheres. Since the essential difference among the three nanospheres is the composition of the core, we conclude that the core influences the adsorption characteristics of the nanospheres as a consequence of their disassembly upon adsorption. These results are expected to be useful in designing nanospheres for their efficient transport across vascular barriers and for delivering drugs to their targets.
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25
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Abstract
Cadaveric skin allograft is the current standard of treatment for temporary coverage of large burn wounds. Porcine xenografts are viable alternatives but undergo α-1,3-galactose (Gal)-mediated hyperacute rejection and are lost by post-operative day (POD) 3 because of naturally occurring antibodies to Gal in primate recipients. Using baboons, we previously demonstrated that xenografts from GalT-KO swine (lacking Gal) provided wound coverage comparable with allografts with systemic immunosuppression. In this study, we investigate topical immunosuppression as an alternative to prolong xenograft survival. Full-thickness wounds in baboons were created and covered with xenogeneic and allogeneic split-thickness skin grafts (STSGs). Animals were treated with slow-release (TyroSphere-encapsulated) topical formulations (cyclosporine-A [CSA] or Tacrolimus) applied 1) directly to the STSGs only, or 2) additionally to the wound bed before STSG and 1). Topical CSA did not improve either xenograft or allograft survival (median: treated grafts = 12.5 days, control = 14 days; P = 0.27) with similar results when topical Tacrolimus was used. Pretreatment of wound beds resulted in a significant reduction of xenograft survival compared with controls (10 vs 14 days; P = 0.0002), with comparable results observed in allografts. This observation was associated with marked reduction of inflammation on histology with Tacrolimus and not CSA. Prolongation of allograft and xenograft survival after application to full-thickness wound beds was not achieved with the current formulation of topical immunosuppressants. Modulation of inflammation within the wound bed was effective with Tacrolimus pretreatment before STSG application and may serve as a treatment strategy in related fields.
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26
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Shahzad KA, Naeem M, Zhang L, Wan X, Song S, Pei W, Zhao C, Jin X, Shen C. Design and Optimization of PLGA Particles to Deliver Immunomodulatory Drugs for the Prevention of Skin Allograft Rejection. Immunol Invest 2019; 49:840-857. [PMID: 31809611 DOI: 10.1080/08820139.2019.1695134] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Background: Recent advancements in therapeutic strategies have attracted considerable attention to control the acute organs and tissues rejection, which is the main cause of mortality in transplant recipients. The long-term usage of immunosuppressive drugs compromises the body immunity against simple infections and decrease the patients' quality of life. Tolerance of allograft in recipients without harming the rest of host immune system is the basic idea to develop the therapeutic approaches after induction of donor-specific transplant. Methods: Controlled and targeted delivery system by using biomimetic micro and nanoparticles as carriers is an effective strategy to deplete the immune cells in response to allograft in an antigen-specific manner. Polylactic-co-glycolic acid (PLGA) is a biocompatible and biodegradable polymer, which has frequently being used as drug delivery vehicle. Results: This review focuses on the biomedical applications of PLGA based biomimetic micro and nano-sized particles in drug delivery systems to prolong the survival of alloskin graft. Conclusion: We will discuss the mediating factors for rejection of alloskin graft, selective depletion of immune cells, controlled release mechanism, physiochemical properties, size-based body distribution of PLGA particles and their effect on overall host immune system.
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Affiliation(s)
- Khawar Ali Shahzad
- Department of Microbiology and Immunology, Medical School, Southeast University , Nanjing, Jiangsu, China.,School of Pharmacy, Taizhou Polytechnic College , Taizhou, Jiangsu, China
| | - Muhammad Naeem
- Institute of Pure and Applied Biology, Zoology Division, Bahauddin Zakariya University , Multan, Pakistan
| | - Lei Zhang
- Department of Microbiology and Immunology, Medical School, Southeast University , Nanjing, Jiangsu, China.,Department of Clinical Laboratory, Lishui District People's Hospital of Nanjing , Nanjing, Jiangsu, China
| | - Xin Wan
- Department of Microbiology and Immunology, Medical School, Southeast University , Nanjing, Jiangsu, China
| | - Shilong Song
- Department of Microbiology and Immunology, Medical School, Southeast University , Nanjing, Jiangsu, China
| | - Weiya Pei
- Department of Microbiology and Immunology, Medical School, Southeast University , Nanjing, Jiangsu, China
| | - Chen Zhao
- Department of Microbiology and Immunology, Medical School, Southeast University , Nanjing, Jiangsu, China
| | - Xiaoxiao Jin
- Department of Microbiology and Immunology, Medical School, Southeast University , Nanjing, Jiangsu, China
| | - Chuanlai Shen
- Department of Microbiology and Immunology, Medical School, Southeast University , Nanjing, Jiangsu, China
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27
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Development of Nanostructured Liquid Crystalline Formulation of Anti-Cancer Drug as a New Drug Delivery System. J Pharm Innov 2019. [DOI: 10.1007/s12247-019-09371-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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28
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Ramezanli T, Michniak-Kohn BB. Development and Characterization of a Topical Gel Formulation of Adapalene-TyroSpheres and Assessment of Its Clinical Efficacy. Mol Pharm 2018; 15:3813-3822. [DOI: 10.1021/acs.molpharmaceut.8b00318] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tannaz Ramezanli
- Ernest Mario School of Pharmacy, Rutgers—The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, New Jersey 08854, United States
- Center for Dermal Research, Rutgers—The State University of New Jersey, 145 Bevier Roa, Piscataway, New Jersey 08854, United States
| | - Bozena B. Michniak-Kohn
- Ernest Mario School of Pharmacy, Rutgers—The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, New Jersey 08854, United States
- Center for Dermal Research, Rutgers—The State University of New Jersey, 145 Bevier Roa, Piscataway, New Jersey 08854, United States
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29
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Bobbala S, Allen SD, Scott EA. Flash nanoprecipitation permits versatile assembly and loading of polymeric bicontinuous cubic nanospheres. NANOSCALE 2018; 10:5078-5088. [PMID: 29255814 PMCID: PMC6644045 DOI: 10.1039/c7nr06779h] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Polymeric bicontinuous nanospheres (BCNs) that are analogous to lipid cubosomes possess high internal surface area and porosity that can accommodate the loading of a wide range of hydrophobic and hydrophilic molecules for diverse applications. Self-assembly of BCNs has been reported using complex amphiphilic polymeric structures, with co-solvent dispersion being the only documented method of formation. Here, we report a simple amphiphilic diblock copolymer, poly(ethylene glycol)17-block-poly(propylene sulfide)75 (PEG17-bl-PPS75), to form BCNs using the rapid and scalable technique of flash nanoprecipitation (FNP). Dynamic light scattering (DLS) and cryogenic transmission electron microscopy (cryoTEM) verified low polydispersity and the formation of bicontinuous structures with internal aqueous channels, respectively. Small-angle X-ray scattering (SAXS) confirmed a primitive cubic (Im3m) internal organization for BCNs assembled by FNP. Both hydrophobic and hydrophilic molecules were effectively loaded into BCNs via FNP, and encapsulated payloads were found to release in controlled manner in aqueous solutions. Due to the oxidation-sensitivity of PPS, biologically relevant concentrations of reactive oxygen species could trigger payload release on demand. BCNs were found to be non-toxic and endocytosed by phagocytic cells. Furthermore, an in vitro functional assay showed BCNs co-loaded with antigen ovalbumin and adjuvant monophosphoryl lipid A (MPL) to promote peptide/MHCI surface presentation by dendritic cells, a critical step for vaccine formulations during immunization. In conclusion, FNP supports the facile and scalable assembly and loading of PEG-bl-PPS BCNs, making them an attractive nanoscale delivery vehicle for both hydrophilic and hydrophobic molecules.
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Affiliation(s)
- Sharan Bobbala
- Department of Biomedical Engineering, Northwestern University, Evanston, Illinois, USA.
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30
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Murthy NS, Zhang Z, Borsadia S, Kohn J. Nanospheres with a smectic hydrophobic core and an amorphous PEG hydrophilic shell: structural changes and implications for drug delivery. SOFT MATTER 2018; 14:1327-1335. [PMID: 29372231 PMCID: PMC5929128 DOI: 10.1039/c7sm02472j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The structure of nanospheres with a crystalline core and an amorphous diffuse shell was investigated by small-angle neutron scattering (SANS), small-, medium-, and wide-angle X-ray scattering (SAXS, MAXS and WAXS), and differential scanning calorimetry (DSC). Nanospheres, 28 to 35 nm in diameter, were prepared from a triblock copolymer with poly(ethylene glycol) (PEG) hydrophilic end-blocks and oligomers of alternating desaminotyrosyl-tyrosine octyl ester (DTO) and suberic acid (SA) as the central hydrophobic block. In the lyophilized nanospheres, the diffraction patterns show that the PEG shell is ∼10 nm in thickness and crystalline, and the hydrophobic core is ∼10 nm in diameter with a smectic liquid crystalline texture. In aqueous dispersions, the hydrated PEG forms an amorphous shell, but the crystalline phase in the core persists at concentrations down to 1 mg ml-1 as evidenced by the sharp MAXS diffraction peak at a d-spacing of 24.4 Å and a melting endotherm at 40 °C. As the dispersion is diluted (<1 mg ml-1), the core becomes less ordered, and its diameter decreases by 50% even though the overall size of the nanosphere remains essentially unchanged. It is likely that below a critical concentration, intermixing of hydrophobic segments with the PEG segments reduces the size and the crystallinity of the core. At these concentrations, the PEG corona forms a eutectic with water. The mechanisms by which the concentration of the dispersion influences the structure of the nanospheres, and consequently their drug-release characteristics, are discussed.
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Affiliation(s)
- N Sanjeeva Murthy
- New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA.
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31
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Endocytic pathways of optimized resveratrol cubosomes capturing into human hepatoma cells. Biomed Pharmacother 2017; 93:561-569. [DOI: 10.1016/j.biopha.2017.06.093] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2017] [Revised: 06/17/2017] [Accepted: 06/23/2017] [Indexed: 12/17/2022] Open
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32
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Yao Q, Gutierrez DC, Hoang NH, Kim D, Wang R, Hobbs C, Zhu L. Efficient Codelivery of Paclitaxel and Curcumin by Novel Bottlebrush Copolymer-based Micelles. Mol Pharm 2017; 14:2378-2389. [PMID: 28605595 DOI: 10.1021/acs.molpharmaceut.7b00278] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The novel self-assembling bottlebrush polyethylene glycol-polynorbornene-thiocresol block copolymers (PEG-PNB-TC) were synthesized by the ring opening metathesis polymerization (ROMP), followed by functionalization of the polymer backbone via the thio-bromo "click" postpolymerization strategy. The PEG-PNB-TC copolymers could easily self-assemble into the nanoscale core-shell polymeric micelles. The hydrophobic anticancer drugs, such as paclitaxel (PTX), could be loaded into their hydrophobic core to form a stable drug-loaded micelle with a superior drug loading capacity of up to ∼35% (w/w). The sustained drug release behavior of the PEG-PNB-TC micelles was observed under a simulated "sink condition". Compared with commercial PTX formulation (Taxol), the PTX-loaded PEG-PNB-TC micelles showed the enhanced in vitro cellular uptake and comparable cytotoxicity in the drug-sensitive cancer cells, while the copolymers were much safer than Cremophor EL, the surfactant used in Taxol. Furthermore, curcumin (CUR), a natural chemotherapy drug sensitizer, was successfully coloaded with PTX into the PEG-PNB-TC micelles. High drug loading capacity of the PEG-PNB-TC micelles allowed for easy adjustment of drug doses and the ratio of the coloaded drugs. The combination of PTX and CUR showed synergistic anticancer effect in both the drug mixture and drug coloaded micelles at high CUR/PTX ratio, while low CRU/PTX ratio only exhibited additive effects. The combinatorial effects remarkably circumvented the PTX resistance in the multidrug resistant (MDR) cancer cells. Due to the easy polymerization and functionalization, excellent self-assembly capability, high drug loading capability, and great stability, the PEG-PNB-TC copolymers might be a promising nanomaterial for delivery of the hydrophobic anticancer drugs, especially for combination drug therapy.
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Affiliation(s)
- Qing Yao
- Department of Pharmaceutical Sciences, Irma Lerma Rangel College of Pharmacy, Texas A&M University Health Science Center , Kingsville, Texas 78363, United States.,Department of Pharmaceutics, College of Pharmacy, Shenyang Pharmaceutical University , Shenyang, 110016 Liaoning, People's Republic of China
| | - David C Gutierrez
- Department of Chemistry, Texas A&M University-Kingsville , Kingsville, Texas 78363, United States
| | - Ngoc Ha Hoang
- Department of Pharmaceutical Sciences, Irma Lerma Rangel College of Pharmacy, Texas A&M University Health Science Center , Kingsville, Texas 78363, United States.,Nanobiopharmaceutics laboratory, College of Pharmacy, Chung-Ang University , Seoul, South Korea.,Department of Pharmaceutics, Hanoi University of Pharmacy , Ha Noi, Vietnam
| | - Dongin Kim
- Department of Pharmaceutical Sciences, Irma Lerma Rangel College of Pharmacy, Texas A&M University Health Science Center , Kingsville, Texas 78363, United States
| | - Ruoning Wang
- Center for Childhood Cancer and Blood Disease, The Research Institute at Nationwide Children's Hospital, Ohio State University , Columbus, Ohio 43025-2696, United States
| | - Christopher Hobbs
- Department of Chemistry, Texas A&M University-Kingsville , Kingsville, Texas 78363, United States
| | - Lin Zhu
- Department of Pharmaceutical Sciences, Irma Lerma Rangel College of Pharmacy, Texas A&M University Health Science Center , Kingsville, Texas 78363, United States
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Salmasi A, Lee GT, Patel N, Goyal R, Dinizo M, Kwon YS, Modi PK, Faiena I, Kim HJ, Lee N, Hannan JL, Kohn J, Kim IY. Off-Target Effect of Sildenafil on Postsurgical Erectile Dysfunction: Alternate Pathways and Localized Delivery System. J Sex Med 2016; 13:1834-1843. [PMID: 27843073 DOI: 10.1016/j.jsxm.2016.10.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 10/01/2016] [Accepted: 10/12/2016] [Indexed: 11/26/2022]
Abstract
INTRODUCTION There is no consensus on the best oral phosphodiesterase type 5 inhibitor (PDE5I) for patients undergoing penile rehabilitation after surgical nerve injury. AIM To determine the mechanism of PDE5I on cultured neuronal cells and the effectiveness of local drug delivery using nanospheres (NSPs) to sites of nerve injury in a rat model of bilateral cavernous nerve injury (BCNI). METHODS The effects of sildenafil, tadalafil, and vardenafil on cyclic adenosine monophosphate, cyclic guanosine monophosphate, and cell survival after exposure to hypoxia and H2O2 were measured in PC12, SH-SY5Y, and NTERA-2 (NT2) cell cultures. The effects of phosphodiesterase type 4 inhibitor (PDE4I) and PDE5I on neuronal cell survival were evaluated. Male rats underwent BCNI and were untreated (BCNI), immediately treated with application of empty NSPs (BCNI + NSP), NSPs containing sildenafil (Sild + NSP), or NSPs containing rolipram (Rol + NSP). MAIN OUTCOME MEASURES Viability of neuronal cells was measured. Intracavernous pressure changes after cavernous nerve electrostimulation and expression of neurofilament, nitric oxide synthase, and actin in mid-shaft of penis were analyzed 14 days after injury. RESULTS Sildenafil and rolipram significantly decreased cell death after exposure to H2O2 and hypoxia in PC12, SH-SY5Y, and NT2 cells. PC12 cells did not express PDE5 and knockdown of PDE4 significantly increased cell viability in PC12, SH-SY5Y, and NT2 cells exposed to hypoxia. The ratio of intracavernous pressure to mean arterial pressure and expression of penile neurofilament, nitric oxide synthase, and actin were significantly higher in the Sild + NSP and Rol + NSP groups than in the BCNI and BCNI + NSP groups. Limitations included analysis in only two PDE families using only a single dose. CONCLUSION Sildenafil showed the most profound neuroprotective effect compared with tadalafil and vardenafil. Sildenafil- or rolipram-loaded NSP delivery to the site of nerve injury prevented erectile dysfunction and led to increased neurofilament, nitric oxide synthase, smooth muscle content in rat penile tissue after BCNI.
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Affiliation(s)
- Amirali Salmasi
- Section of Urologic Oncology, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA; Division of Urology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Geun Taek Lee
- Section of Urologic Oncology, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA
| | - Neal Patel
- Section of Urologic Oncology, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA; Division of Urology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Ritu Goyal
- New Jersey Center for Biomaterials, Rutgers University, Piscataway, NJ, USA
| | - Michael Dinizo
- Section of Urologic Oncology, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA; Division of Urology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Young Suk Kwon
- Section of Urologic Oncology, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA
| | - Parth K Modi
- Section of Urologic Oncology, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA; Division of Urology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Izak Faiena
- Section of Urologic Oncology, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA; Division of Urology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Hee-Jin Kim
- Department of Neurology, College of Medicine, Hanyang University Medical Center, Seoul, Korea
| | - Nara Lee
- Department of Neurology, College of Medicine, Hanyang University Medical Center, Seoul, Korea; Department of Medicine, Rutgers Cancer Institute of New Jersey and Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Johanna L Hannan
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, USA
| | - Joachim Kohn
- New Jersey Center for Biomaterials, Rutgers University, Piscataway, NJ, USA
| | - Isaac Yi Kim
- Section of Urologic Oncology, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA; Division of Urology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA.
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Ramezanli T, Kilfoyle BE, Zhang Z, Michniak-Kohn BB. Polymeric nanospheres for topical delivery of vitamin D3. Int J Pharm 2016; 516:196-203. [PMID: 27810351 DOI: 10.1016/j.ijpharm.2016.10.072] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 10/27/2016] [Accepted: 10/29/2016] [Indexed: 02/03/2023]
Abstract
This study investigates the potential application of polymeric nanospheres (known as TyroSpheres) as a formulation carrier for topical delivery of cholecalciferol (i.e., Vitamin D3, VD3) with the goal to improve the skin delivery and stability of VD3. High drug loading and binding efficiencies were obtained for VD3 when loaded in TyroSpheres. VD3 was released from TyroSpheres in a sustained manner and was delivered across the stratum corneum, which occurred independent of the initial drug loading. An ex vivo skin distribution study showed that TyroSphere formulations delivered 3-10μg of active into the epidermis which was significantly higher than that delivered from Transcutol® (the control vehicle). In addition, an in vitro cytotoxicity assay using keratinocytes confirmed that VD3 encapsulation in the nanoparticles did not alter the drug activity. Photodegradation of VD3 followed zero-order kinetics. TyroSpheres were able to protect the active against hydrolysis and photodegradation, significantly enhancing the stability of VD3 in the topical formulation.
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Affiliation(s)
- Tannaz Ramezanli
- Ernest Mario School of Pharmacy, Rutgers-The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, NJ 08854, USA; Center for Dermal Research, Rutgers-The State University of New Jersey, 145 Bevier Rd, Piscataway, NJ 08854, USA
| | - Brian E Kilfoyle
- Ernest Mario School of Pharmacy, Rutgers-The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, NJ 08854, USA; The New Jersey Center for Biomaterials, Rutgers-The State University of New Jersey, 145 Bevier Rd, Piscataway, NJ 08854, USA
| | - Zheng Zhang
- The New Jersey Center for Biomaterials, Rutgers-The State University of New Jersey, 145 Bevier Rd, Piscataway, NJ 08854, USA; Mosaic Biosciences, 3415 Colorado Avenue, Boulder, CO 80309, USA
| | - Bozena B Michniak-Kohn
- Ernest Mario School of Pharmacy, Rutgers-The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, NJ 08854, USA; Center for Dermal Research, Rutgers-The State University of New Jersey, 145 Bevier Rd, Piscataway, NJ 08854, USA.
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35
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Goyal R, Macri LK, Kaplan HM, Kohn J. Nanoparticles and nanofibers for topical drug delivery. J Control Release 2016; 240:77-92. [PMID: 26518723 PMCID: PMC4896846 DOI: 10.1016/j.jconrel.2015.10.049] [Citation(s) in RCA: 277] [Impact Index Per Article: 34.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 10/23/2015] [Accepted: 10/26/2015] [Indexed: 01/11/2023]
Abstract
This review provides the first comprehensive overview of the use of both nanoparticles and nanofibers for topical drug delivery. Researchers have explored the use of nanotechnology, specifically nanoparticles and nanofibers, as drug delivery systems for topical and transdermal applications. This approach employs increased drug concentration in the carrier, in order to increase drug flux into and through the skin. Both nanoparticles and nanofibers can be used to deliver hydrophobic and hydrophilic drugs and are capable of controlled release for a prolonged period of time. The examples presented provide significant evidence that this area of research has - and will continue to have - a profound impact on both clinical outcomes and the development of new products.
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Affiliation(s)
- Ritu Goyal
- New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey, 145 Bevier Road, Piscataway, NJ 08854, USA
| | - Lauren K Macri
- New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey, 145 Bevier Road, Piscataway, NJ 08854, USA
| | - Hilton M Kaplan
- New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey, 145 Bevier Road, Piscataway, NJ 08854, USA
| | - Joachim Kohn
- New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey, 145 Bevier Road, Piscataway, NJ 08854, USA.
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Muntimadugu E, Dhommati R, Jain A, Challa VGS, Shaheen M, Khan W. Intranasal delivery of nanoparticle encapsulated tarenflurbil: A potential brain targeting strategy for Alzheimer's disease. Eur J Pharm Sci 2016; 92:224-34. [PMID: 27185298 DOI: 10.1016/j.ejps.2016.05.012] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Revised: 05/03/2016] [Accepted: 05/12/2016] [Indexed: 12/18/2022]
Abstract
Poor brain penetration of tarenflurbil (TFB) was one of the major reasons for its failure in phase III clinical trials conducted on Alzheimer's patients. Thus there is a tremendous need of developing efficient delivery systems for TFB. This study was designed with the aim of improving drug delivery to brain through intranasally delivered nanocarriers. TFB was loaded into two different nanocarriers i.e., poly (lactide-co-glycolide) nanoparticles (TFB-NPs) and solid lipid nanoparticles (TFB-SLNs). Particle size of both the nanocarriers (<200nm) as determined by dynamic light scattering technique and transmission electron microscopy, assured transcellular transport across olfactory axons whose diameter was ≈200nm and then paving a direct path to brain. TFB-NPs and TFB-SLNs resulted in 64.11±2.21% and 57.81±5.32% entrapment efficiencies respectively which again asserted protection of drug from chemical and biological degradation in nasal cavity. In vitro release studies proved the sustained release of TFB from TFB-NPs and TFB-SLNs in comparison with pure drug, indicating prolonged residence times of drug at targeting site. Pharmacokinetics suggested improved circulation behavior of nanoparticles and the absolute bioavailabilities followed this order: TFB-NPs (i.n.)>TFB-SLNs (i.n.)>TFB solution (i.n.)>TFB suspension (oral). Brain targeting efficiency was determined in terms of %drug targeting efficiency (%DTE) and drug transport percentage (DTP). The higher %DTE (287.24) and DTP (65.18) were observed for TFB-NPs followed by TFB-SLNs (%DTE: 183.15 and DTP: 45.41) among all other tested groups. These encouraging results proved that therapeutic concentrations of TFB could be transported directly to brain via olfactory pathway after intranasal administration of polymeric and lipidic nanoparticles.
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Affiliation(s)
- Eameema Muntimadugu
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500037, India
| | - Raju Dhommati
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500037, India
| | - Anjali Jain
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500037, India
| | - Venu Gopala Swami Challa
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500037, India
| | - M Shaheen
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500037, India
| | - Wahid Khan
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500037, India.
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Dai Z, Yu X, Hong J, Liu X, Sun J, Sun X. Development of a novel CsA-PLGA drug delivery system based on a glaucoma drainage device for the prevention of postoperative fibrosis. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 66:206-214. [PMID: 27207056 DOI: 10.1016/j.msec.2016.04.077] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 04/11/2016] [Accepted: 04/21/2016] [Indexed: 10/21/2022]
Abstract
The formation of a scar after glaucoma surgery often leads to unsuccessful control of intraocular pressure, and should be prevented by using a variety of methods. We designed and developed a novel drug delivery system (DDS) comprising cyclosporine A (CsA) and poly(lactic-co-glycolic acid) (PLGA) based on a glaucoma drainage device (GDD) that can continuously release CsA to prevent postoperative fibrosis following glaucoma surgery. The CsA@PLGA@GDD DDS was observed by field emission scanning electron microscopy and revealed an asymmetric pore structure. Thermogravimetric analysis was performed to measure the weight loss and evaluate the thermal stability of the CsA@PLGA@GDD DDS. The in vitro drug release profile of the DDS was studied using high performance liquid chromatography, which confirmed that the DDS released CsA at a stable rate and maintained adequate CsA concentrations for a relatively long time. The biocompatibility of the DDS and the inhibitory effects on the postoperative fibrosis were investigated in vitro using rabbit Tenon's fibroblasts. The in vivo safety and efficacy of the DDS were examined by implanting the DDS into Tenon's capsules in New Zealand rabbits. Bleb morphology, intraocular pressure, anterior chamber reactions, and anterior chamber angiography were studied at a series of set times. The DDS kept the filtration pathway unblocked for a longer time compared with the control GDD. The results indicate that the CsA@PLGA@GDD DDS represents a safe and effective strategy for preventing scar formation after glaucoma surgery.
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Affiliation(s)
- Zhaoxing Dai
- Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai 200031, China; Shanghai Key Laboratory of Visual Impairment and Restoration, Fudan University, Shanghai 200031, China
| | - Xiaobo Yu
- Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai 200031, China; Shanghai Key Laboratory of Visual Impairment and Restoration, Fudan University, Shanghai 200031, China
| | - Jiaxu Hong
- Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai 200031, China; Shanghai Key Laboratory of Visual Impairment and Restoration, Fudan University, Shanghai 200031, China
| | - Xi Liu
- Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai 200031, China; Shanghai Key Laboratory of Visual Impairment and Restoration, Fudan University, Shanghai 200031, China
| | - Jianguo Sun
- Research Center, Eye & ENT Hospital, Fudan University, Shanghai 200031, China; Shanghai Key Laboratory of Visual Impairment and Restoration, Fudan University, Shanghai 200031, China; State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200031, China.
| | - Xinghuai Sun
- Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai 200031, China; Shanghai Key Laboratory of Visual Impairment and Restoration, Fudan University, Shanghai 200031, China.
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Aydin F, Chu X, Uppaladadium G, Devore D, Goyal R, Murthy NS, Zhang Z, Kohn J, Dutt M. Self-Assembly and Critical Aggregation Concentration Measurements of ABA Triblock Copolymers with Varying B Block Types: Model Development, Prediction, and Validation. J Phys Chem B 2016; 120:3666-76. [PMID: 27031284 DOI: 10.1021/acs.jpcb.5b12594] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The dissipative particle dynamics (DPD) simulation technique is a coarse-grained (CG) molecular dynamics-based approach that can effectively capture the hydrodynamics of complex systems while retaining essential information about the structural properties of the molecular species. An advantageous feature of DPD is that it utilizes soft repulsive interactions between the beads, which are CG representation of groups of atoms or molecules. In this study, we used the DPD simulation technique to study the aggregation characteristics of ABA triblock copolymers in aqueous medium. Pluronic polymers (PEG-PPO-PEG) were modeled as two segments of hydrophilic beads and one segment of hydrophobic beads. Tyrosine-derived PEG5K-b-oligo(desaminotyrosyl tyrosine octyl ester-suberate)-b-PEG5K (PEG5K-oligo(DTO-SA)-PEG5K) block copolymers possess alternate rigid and flexible components along the hydrophobic oligo(DTO-SA) chain, and were modeled as two segments of hydrophilic beads and one segment of hydrophobic, alternate soft and hard beads. The formation, structure, and morphology of the initial aggregation of the polymer molecules in aqueous medium were investigated by following the aggregation dynamics. The dimensions of the aggregates predicted by the computational approach were in good agreement with corresponding results from experiments, for the Pluronic and PEG5K-oligo(DTO-SA)-PEG5K block copolymers. In addition, DPD simulations were utilized to determine the critical aggregation concentration (CAC), which was compared with corresponding results from an experimental approach. For Pluronic polymers F68, F88, F108, and F127, the computational results agreed well with experimental measurements of the CAC measurements. For PEG5K-b-oligo(DTO-SA)-b-PEG5K block polymers, the complexity in polymer structure made it difficult to directly determine their CAC values via the CG scheme. Therefore, we determined CAC values of a series of triblock copolymers with 3-8 DTO-SA units using DPD simulations, and used these results to predict the CAC values of triblock copolymers with higher molecular weights by extrapolation. In parallel, a PEG5K-b-oligo(DTO-SA)-b-PEG5K block copolymer was synthesized, and the CAC value was determined experimentally using the pyrene method. The experimental CAC value agreed well with the CAC value predicted by simulation. These results validate our CG models, and demonstrate an avenue to simulate and predict aggregation characteristics of ABA amphiphilic triblock copolymers with complex structures.
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Affiliation(s)
- Fikret Aydin
- Department of Chemical Engineering and ‡New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey , Piscataway 08854, New Jersey, United States
| | - Xiaolei Chu
- Department of Chemical Engineering and ‡New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey , Piscataway 08854, New Jersey, United States
| | - Geetartha Uppaladadium
- Department of Chemical Engineering and ‡New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey , Piscataway 08854, New Jersey, United States
| | - David Devore
- Department of Chemical Engineering and ‡New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey , Piscataway 08854, New Jersey, United States
| | - Ritu Goyal
- Department of Chemical Engineering and ‡New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey , Piscataway 08854, New Jersey, United States
| | - N Sanjeeva Murthy
- Department of Chemical Engineering and ‡New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey , Piscataway 08854, New Jersey, United States
| | - Zheng Zhang
- Department of Chemical Engineering and ‡New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey , Piscataway 08854, New Jersey, United States
| | - Joachim Kohn
- Department of Chemical Engineering and ‡New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey , Piscataway 08854, New Jersey, United States
| | - Meenakshi Dutt
- Department of Chemical Engineering and ‡New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey , Piscataway 08854, New Jersey, United States
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