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Iemtsev A, Zumaya ALV, Dinh M, Hassouna F, Fulem M. Towards rational design of API-poly(D, L-lactide-co-glycolide) based micro- and nanoparticles: The role of API-polymer compatibility prediction. Int J Pharm 2024; 650:123724. [PMID: 38123107 DOI: 10.1016/j.ijpharm.2023.123724] [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: 08/14/2023] [Revised: 12/14/2023] [Accepted: 12/16/2023] [Indexed: 12/23/2023]
Abstract
Due to their unique properties, such as controlled drug release and improved bioavailability, polymeric microparticles and nanoparticles (MPs and NPs) have gained considerable interest in the pharmaceutical industry. Nevertheless, the high costs associated with biodegradable polymers and the active pharmaceutical ingredients (APIs) used for treating serious diseases, coupled with the vast number of API-polymer combinations, make the search for effective API-polymer MPs and NPs a costly and time-consuming process. In this work, the correlation between the compatibility of selected model APIs (i.e., ibuprofen, naproxen, paracetamol, and indomethacin) with poly(lactide-co-glycolide) (PLGA) derived from respective binary phase diagrams and characteristics of prepared MPs and NPs, such as the drug loading and solid-state properties, was investigated to probe the possibility of implementing the modeling of API-polymer thermodynamic and kinetic phase behavior as part of rational design of drug delivery systems based on MPs and NPs. API-PLGA-based MPs and NPs were formulated using an emulsion-solvent evaporation technique and were characterized for morphology, mean size, zeta potential, drug loading, and encapsulation efficiency. The solid-state properties of the encapsulated APIs were assessed using differential scanning calorimetry and X-ray powder diffraction. The evaluated compatibility was poor for all considered API-PLGA pairs, which is in alignment with the experimental results showing low drug loading in terms of amorphous API content. At the same time, drug loading of the studied APIs in terms of amorphous content was found to follow the same trend as their solubility in PLGA, indicating a clear correlation between API solubility in PLGA and achievable drug loading. These findings suggest that API-polymer phase behavior modeling and compatibility screening can be employed as an effective preformulation tool to estimate optimum initial API concentration for MP and NP preparation or, from a broader perspective, to tune or select polymeric carriers offering desired drug loading.
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Affiliation(s)
- Anton Iemtsev
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Alma Lucia Villela Zumaya
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Martin Dinh
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Fatima Hassouna
- Faculty of Chemical Engineering, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic.
| | - Michal Fulem
- Department of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague 6, Czech Republic.
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2
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Operti MC, Bernhardt A, Pots J, Sincari V, Jager E, Grimm S, Engel A, Benedikt A, Hrubý M, De Vries IJM, Figdor CG, Tagit O. Translating the Manufacture of Immunotherapeutic PLGA Nanoparticles from Lab to Industrial Scale: Process Transfer and In Vitro Testing. Pharmaceutics 2022; 14:pharmaceutics14081690. [PMID: 36015316 PMCID: PMC9416304 DOI: 10.3390/pharmaceutics14081690] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 08/06/2022] [Accepted: 08/10/2022] [Indexed: 11/16/2022] Open
Abstract
Poly(lactic-co-glycolic acid) (PLGA) nanoparticle-based drug delivery systems are known to offer a plethora of potential therapeutic benefits. However, challenges related to large-scale manufacturing, such as the difficulty of reproducing complex formulations and high manufacturing costs, hinder their clinical and commercial development. In this context, a reliable manufacturing technique suitable for the scale-up production of nanoformulations without altering efficacy and safety profiles is highly needed. In this paper, we develop an inline sonication process and adapt it to the industrial scale production of immunomodulating PLGA nanovaccines developed using a batch sonication method at the laboratory scale. The investigated formulations contain three distinct synthetic peptides derived from the carcinogenic antigen New York Esophageal Squamous Cell Carcinoma-1 (NY-ESO-1) together with an invariant natural killer T-cell (iNKT) activator, threitolceramide-6 (IMM60). Process parameters were optimized to obtain polymeric nanovaccine formulations with a mean diameter of 150 ± 50 nm and a polydispersity index <0.2. Formulation characteristics, including encapsulation efficiencies, release profiles and in vitro functional and toxicological profiles, are assessed and statistically compared for each formulation. Overall, scale-up formulations obtained by inline sonication method could replicate the colloidal and functional properties of the nanovaccines developed using batch sonication at the laboratory scale. Both types of formulations induced specific T-cell and iNKT cell responses in vitro without any toxicity, highlighting the suitability of the inline sonication method for the continuous scale-up of nanomedicine formulations in terms of efficacy and safety.
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Affiliation(s)
- Maria Camilla Operti
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands
- Evonik Operations GmbH, Research Development & Innovation, 64293 Darmstadt, Germany
| | - Alexander Bernhardt
- Evonik Operations GmbH, Research Development & Innovation, 64293 Darmstadt, Germany
| | - Jeanette Pots
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands
| | - Vladimir Sincari
- Institute of Macromolecular Chemistry CAS, Heyrovsky Square 2, 162 06 Prague, Czech Republic
| | - Eliezer Jager
- Institute of Macromolecular Chemistry CAS, Heyrovsky Square 2, 162 06 Prague, Czech Republic
| | - Silko Grimm
- Evonik Operations GmbH, Research Development & Innovation, 64293 Darmstadt, Germany
| | - Andrea Engel
- Evonik Corporation, Birmingham Laboratories, Birmingham, AL 35211, USA
| | - Anne Benedikt
- Evonik Operations GmbH, Research Development & Innovation, 64293 Darmstadt, Germany
| | - Martin Hrubý
- Institute of Macromolecular Chemistry CAS, Heyrovsky Square 2, 162 06 Prague, Czech Republic
| | - Ingrid Jolanda M. De Vries
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands
| | - Carl G. Figdor
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands
| | - Oya Tagit
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands
- Correspondence:
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Andrian T, Delcanale P, Pujals S, Albertazzi L. Correlating Super-Resolution Microscopy and Transmission Electron Microscopy Reveals Multiparametric Heterogeneity in Nanoparticles. NANO LETTERS 2021; 21:5360-5368. [PMID: 34125548 PMCID: PMC8227466 DOI: 10.1021/acs.nanolett.1c01666] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/03/2021] [Indexed: 05/22/2023]
Abstract
The functionalization of nanoparticles with functional moieties is a key strategy to achieve cell targeting in nanomedicine. The interplay between size and ligand number is crucial for the formulation performance and needs to be properly characterized to understand nanoparticle structure-activity relations. However, there is a lack of methods able to measure both size and ligand number at the same time and at the single particle level. Here, we address this issue by introducing a correlative light and electron microscopy (CLEM) method combining super-resolution microscopy (SRM) and transmission electron microscopy (TEM) imaging. We apply our super-resCLEM method to characterize the relationship between size and ligand number and density in PLGA-PEG nanoparticles. We highlight how heterogeneity found in size can impact ligand distribution and how a significant part of the nanoparticle population goes completely undetected in the single-technique analysis. Super-resCLEM holds great promise for the multiparametric analysis of other parameters and nanomaterials.
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Affiliation(s)
- Teodora Andrian
- Institute
for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Baldiri Reixac 15-21, 08028 Barcelona, Spain
| | - Pietro Delcanale
- Dipartimento
di Scienze Matematiche, Fisiche e Informatiche, Università di Parma, Parco area delle Scienze 7/A, 43124 Parma, Italy
| | - Silvia Pujals
- Institute
for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Baldiri Reixac 15-21, 08028 Barcelona, Spain
- Department
of Electronics and Biomedical Engineering, Faculty of Physics, Universitat de Barcelona, Avenido Diagonal 647, 08028, Barcelona, Spain
| | - Lorenzo Albertazzi
- Institute
for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Baldiri Reixac 15-21, 08028 Barcelona, Spain
- Department
of Biomedical Engineering, Institute for Complex Molecular Systems
(ICMS), Eindhoven University of Technology, 5612AZ Eindhoven, The Netherlands
- ;
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4
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Operti MC, Dölen Y, Keulen J, van Dinther EAW, Figdor CG, Tagit O. Microfluidics-Assisted Size Tuning and Biological Evaluation of PLGA Particles. Pharmaceutics 2019; 11:E590. [PMID: 31717354 PMCID: PMC6921086 DOI: 10.3390/pharmaceutics11110590] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 11/03/2019] [Accepted: 11/06/2019] [Indexed: 12/25/2022] Open
Abstract
Polymeric particles made up of biodegradable and biocompatible polymers such as poly(lactic-co-glycolic acid) (PLGA) are promising tools for several biomedical applications including drug delivery. Particular emphasis is placed on the size and surface functionality of these systems as they are regarded as the main protagonists in dictating the particle behavior in vitro and in vivo. Current methods of manufacturing polymeric drug carriers offer a wide range of achievable particle sizes, however, they are unlikely to accurately control the size while maintaining the same production method and particle uniformity, as well as final production yield. Microfluidics technology has emerged as an efficient tool to manufacture particles in a highly controllable manner. Here, we report on tuning the size of PLGA particles at diameters ranging from sub-micron to microns using a single microfluidics device, and demonstrate how particle size influences the release characteristics, cellular uptake and in vivo clearance of these particles. Highly controlled production of PLGA particles with ~100 nm, ~200 nm, and >1000 nm diameter is achieved through modification of flow and formulation parameters. Efficiency of particle uptake by dendritic cells and myeloid-derived suppressor cells isolated from mice is strongly correlated with particle size and is most efficient for ~100 nm particles. Particles systemically administered to mice mainly accumulate in liver and ~100 nm particles are cleared slower. Our study shows the direct relation between particle size varied through microfluidics and the pharmacokinetics behavior of particles, which provides a further step towards the establishment of a customizable production process to generate tailor-made nanomedicines.
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Affiliation(s)
- Maria Camilla Operti
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands; (M.C.O.); (Y.D.); (J.K.); (E.A.W.v.D.); (C.G.F.)
| | - Yusuf Dölen
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands; (M.C.O.); (Y.D.); (J.K.); (E.A.W.v.D.); (C.G.F.)
- Oncode Institute, 3553 Utrecht, The Netherlands
| | - Jibbe Keulen
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands; (M.C.O.); (Y.D.); (J.K.); (E.A.W.v.D.); (C.G.F.)
| | - Eric A. W. van Dinther
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands; (M.C.O.); (Y.D.); (J.K.); (E.A.W.v.D.); (C.G.F.)
- Oncode Institute, 3553 Utrecht, The Netherlands
| | - Carl G. Figdor
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands; (M.C.O.); (Y.D.); (J.K.); (E.A.W.v.D.); (C.G.F.)
- Oncode Institute, 3553 Utrecht, The Netherlands
| | - Oya Tagit
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6500 HB Nijmegen, The Netherlands; (M.C.O.); (Y.D.); (J.K.); (E.A.W.v.D.); (C.G.F.)
- Oncode Institute, 3553 Utrecht, The Netherlands
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Kassick AJ, Allen HN, Yerneni SS, Pary F, Kovaliov M, Cheng C, Pravetoni M, Tomycz ND, Whiting DM, Nelson TL, Feasel M, Campbell PG, Kolber B, Averick S. Covalent Poly(lactic acid) Nanoparticles for the Sustained Delivery of Naloxone. ACS APPLIED BIO MATERIALS 2019; 2:3418-3428. [PMID: 31497753 PMCID: PMC6731033 DOI: 10.1021/acsabm.9b00380] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The opioid epidemic currently plaguing the United States has been exacerbated by an alarming rise in fatal overdoses as a result of the proliferated abuse of synthetic mu opioid receptor (MOR) agonists, such as fentanyl and its related analogues. Attempts to manage this crisis have focused primarily on widespread distribution of the clinically approved opioid reversal agent naloxone (Narcan); however, due to the intrinsic metabolic lability of naloxone, these measures have demonstrated limited effectiveness against synthetic opioid toxicity. This work reports a novel polymer-based strategy to create a long-acting formulation of naloxone with the potential to address this critical issue by utilizing covalent nanoparticle (cNP) drug delivery technology. Covalently loaded naloxone nanoparticles (Nal-cNPs) were prepared via the naloxone-initiated, ring-opening polymerization (ROP) of l-lactide in the presence of a bifunctional thiourea organocatalyst with subsequent precipitation of the resulting naloxone-poly(l-lactic acid) polymer. This protocol afforded well-defined nanoparticles possessing a drug loading of approximately 7% w/w. The resulting Nal-cNPs demonstrated excellent biocompatibility, while exhibiting sustained linear release kinetics in vitro and blocking the effects of high dose (10 mg/kg) acute morphine for up to 98 h in an in vivo rodent model of neuropathic pain.
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Affiliation(s)
- Andrew J. Kassick
- Neuroscience Disruptive Research Lab, Allegheny Health Network Research Institute, Allegheny General Hospital, Pittsburgh, Pennsylvania 15212, United States
- Neuroscience Institute, Allegheny Health Network, Allegheny General Hospital, Pittsburgh, Pennsylvania 15212, United States
| | - Heather N. Allen
- Department of Biological Sciences and Chronic Pain Research Consortium, Duquesne University, Pittsburgh, Pennsylvania 15282, United States
| | - Saigopalakrishna S. Yerneni
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Fathima Pary
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Marina Kovaliov
- Neuroscience Disruptive Research Lab, Allegheny Health Network Research Institute, Allegheny General Hospital, Pittsburgh, Pennsylvania 15212, United States
- Neuroscience Institute, Allegheny Health Network, Allegheny General Hospital, Pittsburgh, Pennsylvania 15212, United States
| | - Cooper Cheng
- Neuroscience Institute, Allegheny Health Network, Allegheny General Hospital, Pittsburgh, Pennsylvania 15212, United States
| | - Marco Pravetoni
- Department of Pharmacology, University of Minnesota Medical School Twin Cities, Minneapolis, Minnesota 55455, United States
| | - Nestor D. Tomycz
- Neuroscience Institute, Allegheny Health Network, Allegheny General Hospital, Pittsburgh, Pennsylvania 15212, United States
| | - Donald M. Whiting
- Neuroscience Institute, Allegheny Health Network, Allegheny General Hospital, Pittsburgh, Pennsylvania 15212, United States
| | - Toby L. Nelson
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Michael Feasel
- Chemical Biological Center, APG, U.S. Army Combat Capabilities Development Command, Edgewood, Maryland 21010, United States
| | - Phil G. Campbell
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Engineering and Engineering Research Accelerator, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Benedict Kolber
- Department of Biological Sciences and Chronic Pain Research Consortium, Duquesne University, Pittsburgh, Pennsylvania 15282, United States
| | - Saadyah Averick
- Neuroscience Disruptive Research Lab, Allegheny Health Network Research Institute, Allegheny General Hospital, Pittsburgh, Pennsylvania 15212, United States
- Neuroscience Institute, Allegheny Health Network, Allegheny General Hospital, Pittsburgh, Pennsylvania 15212, United States
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Rabanel JM, Adibnia V, Tehrani SF, Sanche S, Hildgen P, Banquy X, Ramassamy C. Nanoparticle heterogeneity: an emerging structural parameter influencing particle fate in biological media? NANOSCALE 2019; 11:383-406. [PMID: 30560970 DOI: 10.1039/c8nr04916e] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Drug nanocarriers' surface chemistry is often presumed to be uniform. For instance, the polymer surface coverage and distribution of ligands on nanoparticles are described with averaged values obtained from quantification techniques based on particle populations. However, these averaged values may conceal heterogeneities at different levels, either because of the presence of particle sub-populations or because of surface inhomogeneities, such as patchy surfaces on individual particles. The characterization and quantification of chemical surface heterogeneities are tedious tasks, which are rather limited by the currently available instruments and research protocols. However, heterogeneities may contribute to some non-linear effects observed during the nanoformulation optimization process, cause problems related to nanocarrier production scale-up and correlate with unexpected biological outcomes. On the other hand, heterogeneities, while usually unintended and detrimental to nanocarrier performance, may, in some cases, be sought as adjustable properties that provide NPs with unique functionality. In this review, results and processes related to this issue are compiled, and perspectives and possible analytical developments are discussed.
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Affiliation(s)
- Jean-Michel Rabanel
- Centre INRS Institut Armand-Frappier, 531, boul. des Prairies, Laval, QC H7V 1B7, Canada.
| | - Vahid Adibnia
- Faculté de Pharmacie, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montréal, Québec H3C 3J7, Canada.
| | - Soudeh F Tehrani
- Faculté de Pharmacie, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montréal, Québec H3C 3J7, Canada.
| | - Steven Sanche
- Faculté de Pharmacie, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montréal, Québec H3C 3J7, Canada.
| | - Patrice Hildgen
- Faculté de Pharmacie, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montréal, Québec H3C 3J7, Canada.
| | - Xavier Banquy
- Faculté de Pharmacie, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montréal, Québec H3C 3J7, Canada.
| | - Charles Ramassamy
- Centre INRS Institut Armand-Frappier, 531, boul. des Prairies, Laval, QC H7V 1B7, Canada.
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7
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Sharma A, McCarron P, Matchett K, Hawthorne S, El-Tanani M. Anti-Invasive and Anti-Proliferative Effects of shRNA-Loaded Poly(Lactide-Co-Glycolide) Nanoparticles Following RAN Silencing in MDA-MB231 Breast Cancer Cells. Pharm Res 2018; 36:26. [PMID: 30560466 PMCID: PMC6297200 DOI: 10.1007/s11095-018-2555-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 12/04/2018] [Indexed: 12/13/2022]
Abstract
Background Overexpression of the RAN GTP (RAN) gene has been shown to be linked to metastatic activity of MDA-MB231 human breast cancer cells by increasing Ras/MEK/ERK and PI3K/Akt/mTORC1 signalling. The aim of this study was to investigate the potential of polymeric nanoparticles to deliver two novel shRNA sequences, targeted against the RAN gene, to MDA-MB231 cells grown in culture and to assess their effects in a range of biological assays. Methods Biodegradable PLGA nanoparticles, loaded with shRNA-1 and shRNA-4, were fabricated using a double emulsion solvent evaporation technique and characterised for size, zeta potential and polydispersity index before testing on the MDA-MB231 cell line in a range of assays including cell viability, migration, invasion and gene knock down. Results shRNA-loaded nanoparticles were successfully fabricated and delivered to MDA-MB231 cells in culture, where they effectively released their payload, causing a decrease in both cell invasion and cell migration by knocking down RAN gene expression. Conclusion Results indicate the anti-RAN shRNA-loaded nanoparticles deliver and release biological payload to MDA-MB231 cells in culture. This works paves the way for further investigations into the possible use of anti-RAN shRNA-loaded NP formulations for the treatment of breast cancer in vivo.
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Affiliation(s)
- Ankur Sharma
- School of Pharmacy and Pharmaceutical Sciences, Ulster University, Cromore Road, Coleraine, Co. Londonderry, BT52 1SA, UK
| | - Paul McCarron
- School of Pharmacy and Pharmaceutical Sciences, Ulster University, Cromore Road, Coleraine, Co. Londonderry, BT52 1SA, UK
| | - Kyle Matchett
- School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, Health Sciences Building, 97 Lisburn Road, Belfast, BT9 7BL, UK
| | - Susan Hawthorne
- School of Pharmacy and Pharmaceutical Sciences, Ulster University, Cromore Road, Coleraine, Co. Londonderry, BT52 1SA, UK.
| | - Mohamed El-Tanani
- Institute of Cancer Therapeutics, ICT building, University of Bradford, Richmond Road, Bradford, England, BD7 1DP, UK
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Agbay A, De La Vega L, Nixon G, Willerth S. Guggulsterone-releasing microspheres direct the differentiation of human induced pluripotent stem cells into neural phenotypes. ACTA ACUST UNITED AC 2018; 13:034104. [PMID: 29368696 DOI: 10.1088/1748-605x/aaaa77] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Parkinson's disease (PD), a common neurodegenerative disorder, results from the loss of motor function when dopaminergic neurons (DNs) in the brain selectively degenerate. While pluripotent stem cells (PSCs) show promise for generating replacement neurons, current protocols for generating terminally differentiated DNs require a complicated cocktail of factors. Recent work demonstrated that a naturally occurring steroid called guggulsterone effectively differentiated PSCs into DNs, simplifying this process. In this study, we encapsulated guggulsterone into novel poly-ε-caprolactone-based microspheres and characterized its release profile over 44 d in vitro, demonstrating we can control its release over time. These guggulsterone-releasing microspheres were also successfully incorporated in human induced pluripotent stem cell-derived cellular aggregates under feeder-free and xeno-free conditions and cultured for 20 d to determine their effect on differentiation. All cultures stained positive for the early neuronal marker TUJ1 and guggulsterone microsphere-incorporated aggregates did not adversely affect neurite length and branching. Guggulsterone microsphere incorporated aggregates exhibited the highest levels of TUJ1 expression as well as high Olig 2 expression, an inhibitor of the STAT3 astrogenesis pathway previously known as a target for guggulsterone in cancer treatment. Together, this study represents an important first step towards engineered neural tissues consisting of guggulsterone microspheres and PSCs for generating DNs that could eventually be evaluated in a pre-clinical model of PD.
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Affiliation(s)
- Andrew Agbay
- Department of Neuroscience, Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
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9
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Bharadwaj VN, Nguyen DT, Kodibagkar VD, Stabenfeldt SE. Nanoparticle-Based Therapeutics for Brain Injury. Adv Healthc Mater 2018; 7:10.1002/adhm.201700668. [PMID: 29034608 PMCID: PMC5903677 DOI: 10.1002/adhm.201700668] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 07/06/2017] [Indexed: 12/18/2022]
Abstract
Brain injuries affect a large patient population with major physical and emotional suffering for patients and their relatives; at a significant cost to the society. Effective diagnostic and therapeutic options available for brain injuries are limited by the complex brain injury pathology involving blood-brain barrier (BBB). Brain injuries, including ischemic stroke and brain trauma, initiate BBB opening for a short period of time, which is followed by a second reopening for an extended time. The leaky BBB and/or the alterations in the receptor expression on BBB may provide opportunities for therapeutic delivery via nanoparticles (NPs). The approaches for therapeutic interventions via NP delivery are aimed at salvaging the pericontusional/penumbra area for possible neuroprotection and neurovascular unit preservation. The focus of this progress report is to provide a survey of NP strategies employed in cerebral ischemia and brain trauma and finally provide insights for improved NP-based diagnostic/treatment approaches.
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Affiliation(s)
- Vimala N. Bharadwaj
- School of Biological and Health Systems Engineering, Arizona State University, PO Box 879709, Tempe, AZ 85287, United States
| | - Duong T. Nguyen
- School of Biological and Health Systems Engineering, Arizona State University, PO Box 879709, Tempe, AZ 85287, United States
| | - Vikram D. Kodibagkar
- School of Biological and Health Systems Engineering, Arizona State University, PO Box 879709, Tempe, AZ 85287, United States
| | - Sarah E. Stabenfeldt
- School of Biological and Health Systems Engineering, Arizona State University, PO Box 879709, Tempe, AZ 85287, United States
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10
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Dutta D, Hickey K, Salifu M, Fauer C, Willingham C, Stabenfeldt SE. Spatiotemporal presentation of exogenous SDF-1 with PLGA nanoparticles modulates SDF-1/CXCR4 signaling axis in the rodent cortex. Biomater Sci 2017; 5:1640-1651. [PMID: 28703822 PMCID: PMC5588897 DOI: 10.1039/c7bm00489c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Stromal cell-derived factor-1 (SDF-1) and its key receptor CXCR4 have been implicated in directing cellular recruitment for several pathological/disease conditions thus also gained considerable attention for regenerative medicine. One regenerative approach includes sustained release of SDF-1 to stimulate prolonged stem cell recruitment. However, the impact of SDF-1 sustained release on the endogenous SDF-1/CXCR4 signaling axis is largely unknown as auto-regulatory mechanisms typically dictate cytokine/receptor signaling. We hypothesize that spatiotemporal presentation of exogenous SDF-1 is a key factor in achieving long-term manipulation of endogenous SDF-1/CXCR4 signaling. Here in the present study, we sought to probe our hypothesis using a transgenic mouse model to contrast the spatial activation of endogenous SDF-1 and CXCR4 in response to exogenous SDF-1 injected in bolus or controlled release (PLGA nanoparticles) form in the adult rodent cortex. Our data suggests that the manner of SDF-1 presentation significantly affected initial CXCR4 cellular activation/recruitment despite having similar protein payloads over the first 24 h (∼30 ng for both bolus and sustained release groups). Yet, one week post-injection, this response was negligible. Therefore, the transient nature CXCR4 recruitment/activation in response to bolus or controlled release SDF-1 indicated that cytokine/receptor auto-regulatory mechanisms may demand more complex release profiles (i.e. delayed and/or pulsed release) to achieve sustained cellular response.
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Affiliation(s)
- D Dutta
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA.
| | - K Hickey
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA.
| | - M Salifu
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA.
| | - C Fauer
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA.
| | - C Willingham
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA.
| | - S E Stabenfeldt
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA.
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Dutta D, Fauer C, Hickey K, Salifu M, Stabenfeldt SE. Tunable delayed controlled release profile from layered polymeric microparticles. J Mater Chem B 2017; 5:4487-4498. [PMID: 28652916 DOI: 10.1039/c7tb00138j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Composite microparticles (MPs) with layered architecture, engineered from poly(L-lactic acid) (PLLA) and poly(D,L-lactic-co-glycolic acid) (PLGA), are promising devices for achieving the delayed release of proteins. Here, we build on a water-in-oil-in-oil-in-water emulsion method of fabricating layered MPs with an emphasis on modulating the delay period of the protein release profile. Particle hardening parameters (i.e. polymer precipitation rate and total hardening time) following water-in-oil-in-oil-in-water emulsions are known to affect MP structure such as the core/shell material and cargo localization. We demonstrate that layered MPs fabricated with two different solvent evaporation parameters not only alter polymer and protein distribution within the hardened MPs, but also affect their protein release profiles. Secondly, we hypothesize that ethanol (EtOH), a semi-polar solvent miscible in both the solvent (dichloromethane; DCM) and non-solvent aqueous phases, likely alters DCM and water flux from the dispersed oil phase. The results reveal that EtOH affects protein distribution within MPs, and may also influence MP structural properties such as porosity and polymer distribution. To our knowledge, we are the first to demonstrate EtOH as a means for modulating critical release parameters from protein-loaded, layered PLGA/PLLA MPs. Throughout all the groups in the study, we achieved differential delay periods (between 0 - 30 days after an initial burst release) and total protein release periods (~30 - >58 days) as a function of solvent evaporation parameters and EtOH content. The layered MPs proposed in the study potentially have wide-reaching applications in tissue engineering for delayed and sequential protein release.
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Affiliation(s)
- D Dutta
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA
| | - C Fauer
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA
| | - K Hickey
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA
| | - M Salifu
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA
| | - S E Stabenfeldt
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA
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