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Dorchei F, Heydari A, Kroneková Z, Kronek J, Pelach M, Cseriová Z, Chorvát D, Zúñiga-Navarrete F, Rios PD, McGarrigle J, Ghani S, Isa D, Joshi I, Vasuthas K, Rokstad AMA, Oberholzer J, Raus V, Lacík I. Postmodification with Polycations Enhances Key Properties of Alginate-Based Multicomponent Microcapsules. Biomacromolecules 2024; 25:4118-4138. [PMID: 38857534 DOI: 10.1021/acs.biomac.4c00222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
Postmodification of alginate-based microspheres with polyelectrolytes (PEs) is commonly used in the cell encapsulation field to control microsphere stability and permeability. However, little is known about how different applied PEs shape the microsphere morphology and properties, particularly in vivo. Here, we addressed this question using model multicomponent alginate-based microcapsules postmodified with PEs of different charge and structure. We found that the postmodification can enhance or impair the mechanical resistance and biocompatibility of microcapsules implanted into a mouse model, with polycations surprisingly providing the best results. Confocal Raman microscopy and confocal laser scanning microscopy (CLSM) analyses revealed stable interpolyelectrolyte complex layers within the parent microcapsule, hindering the access of higher molar weight PEs into the microcapsule core. All microcapsules showed negative surface zeta potential, indicating that the postmodification PEs get hidden within the microcapsule membrane, which agrees with CLSM data. Human whole blood assay revealed complex behavior of microcapsules regarding their inflammatory and coagulation potential. Importantly, most of the postmodification PEs, including polycations, were found to be benign toward the encapsulated model cells.
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Affiliation(s)
- Faeze Dorchei
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
| | - Abolfazl Heydari
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
- National Institute of Rheumatic Diseases, Nábrežie I. Krasku 4, 921 12 Piešt'any, Slovakia
| | - Zuzana Kroneková
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
- National Institute of Rheumatic Diseases, Nábrežie I. Krasku 4, 921 12 Piešt'any, Slovakia
| | - Juraj Kronek
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
- National Institute of Rheumatic Diseases, Nábrežie I. Krasku 4, 921 12 Piešt'any, Slovakia
| | - Michal Pelach
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
| | - Zuzana Cseriová
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
| | - Dušan Chorvát
- Department of Biophotonics, International Laser Centre, Slovak Centre of Scientific and Technical Information, Ilkovičova 3, 841 04 Bratislava, Slovakia
| | - Fernando Zúñiga-Navarrete
- Department of Proteomics, Institute of Virology, Biomedical Research Center of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 05 Bratislava, Slovakia
| | - Peter D Rios
- CellTrans, Inc., 2201 W. Campbell Park Dr., Chicago, Illinois 60612, United States
| | - James McGarrigle
- CellTrans, Inc., 2201 W. Campbell Park Dr., Chicago, Illinois 60612, United States
| | - Sofia Ghani
- CellTrans, Inc., 2201 W. Campbell Park Dr., Chicago, Illinois 60612, United States
| | - Douglas Isa
- CellTrans, Inc., 2201 W. Campbell Park Dr., Chicago, Illinois 60612, United States
| | - Ira Joshi
- CellTrans, Inc., 2201 W. Campbell Park Dr., Chicago, Illinois 60612, United States
| | - Kalaiyarasi Vasuthas
- Centre of Molecular Inflammation Research (CEMIR), Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Prinsesse Kristinas gt.1, NO-7491 Trondheim, Norway
| | - Anne Mari A Rokstad
- Centre of Molecular Inflammation Research (CEMIR), Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Prinsesse Kristinas gt.1, NO-7491 Trondheim, Norway
| | - José Oberholzer
- CellTrans, Inc., 2201 W. Campbell Park Dr., Chicago, Illinois 60612, United States
- Department of Visceral Surgery and Transplantation, University Hospital Zurich, Raemistrasse 100, 8091 Zurich, Switzerland
| | - Vladimír Raus
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Igor Lacík
- Department for Biomaterials Research, Polymer Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
- National Institute of Rheumatic Diseases, Nábrežie I. Krasku 4, 921 12 Piešt'any, Slovakia
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Adeyemi SA, Choonara YE. Current advances in cell therapeutics: A biomacromolecules application perspective. Expert Opin Drug Deliv 2022; 19:521-538. [PMID: 35395914 DOI: 10.1080/17425247.2022.2064844] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Many chronic diseases have evolved and to circumvent the limitations of using conventional drug therapies, smart cell encapsulating delivery systems have been explored to customize the treatment with alignment to disease longevity. Cell therapeutics has advanced in tandem with improvements in biomaterials that can suitably deliver therapeutic cells to achieve targeted therapy. Among the promising biomacromolecules for cell delivery are those that share bio-relevant architecture with the extracellular matrix and display extraordinary compatibility in the presence of therapeutic cells. Interestingly, many biomacromolecules that fulfil these tenets occur naturally and can form hydrogels. AREAS COVERED This review provides a concise incursion into the paradigm shift to cell therapeutics using biomacromolecules. Advances in the design and use of biomacromolecules to assemble smart therapeutic cell carriers is discussed in light of their pivotal role in enhancing cell encapsulation and delivery. In addition, the principles that govern the application of cell therapeutics in diabetes, neuronal disorders, cancers and cardiovascular disease are outlined. EXPERT OPINION Cell therapeutics promises to revolutionize the treatment of various secretory cell dysfunctions. Current and future advances in designing functional biomacromolecules will be critical to ensure that optimal delivery of therapeutic cells is achieved with desired biosafety and potency.
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Affiliation(s)
- Samson A Adeyemi
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Science, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown, 2193, South Africa
| | - Yahya E Choonara
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Science, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, 7 York Road, Parktown, 2193, South Africa
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3
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Kovacevic B, Jones M, Ionescu C, Walker D, Wagle S, Chester J, Foster T, Brown D, Mikov M, Mooranian A, Al-Salami H. The emerging role of bile acids as critical components in nanotechnology and bioengineering: Pharmacology, formulation optimizers and hydrogel-biomaterial applications. Biomaterials 2022; 283:121459. [DOI: 10.1016/j.biomaterials.2022.121459] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 02/27/2022] [Accepted: 03/04/2022] [Indexed: 12/16/2022]
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4
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Vieira S, da Silva Morais A, Garet E, Silva-Correia J, Reis RL, González-Fernández Á, Oliveira JM. Methacrylated Gellan Gum/Poly-l-lysine Polyelectrolyte Complex Beads for Cell-Based Therapies. ACS Biomater Sci Eng 2021; 7:4898-4913. [PMID: 34533303 DOI: 10.1021/acsbiomaterials.1c00486] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Cell encapsulation strategies using hydrogel beads have been considered as an alternative to immunosuppression in cell-based therapies. They rely on layer-by-layer (LbL) deposition of polymers to tune beads' permeability, creating a physical barrier to the host immune system. However, the LbL approach can also create diffusion barriers, hampering the flow of essential nutrients and therapeutic cell products. In this work, the polyelectrolyte complex (PEC) methodology was used to circumvent the drawbacks of the LbL strategy by inducing hydrogel bead formation through the interaction of anionic methacrylated gellan gum (GG-MA) with cationic poly-l-lysine (PLL). The interfacial complexation between both polymers resulted in beads with a cell-friendly GG-MA hydrogel core surrounded by a PEC semipermeable membrane. The beads showed great in vitro stability over time, a semi-permeable behavior, and supported human adipose-derived stem cell encapsulation. Additionally, and regarding immune recognition, the in vitro and in vivo studies pointed out that the hydrogel beads behave as an immunocompatible system. Overall, the engineered beads showed great potential for hydrogel-mediated cell therapies, when immunoprotection is required, as when treating different metabolic disorders.
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Affiliation(s)
- Sílvia Vieira
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães 4805-017, Portugal
| | - Alain da Silva Morais
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães 4805-017, Portugal
| | - Elina Garet
- Immunology, Biomedical Research Center (CINBIO), Centro Singular de Investigación de Galicia. de Investigación Sanitaria Galicia Sur (IIS-GS), Universidad de Vigo, Campus Universitario de Vigo, Vigo 36310, Spain
| | - Joana Silva-Correia
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães 4805-017, Portugal
| | - Rui L Reis
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães 4805-017, Portugal
| | - África González-Fernández
- Immunology, Biomedical Research Center (CINBIO), Centro Singular de Investigación de Galicia. de Investigación Sanitaria Galicia Sur (IIS-GS), Universidad de Vigo, Campus Universitario de Vigo, Vigo 36310, Spain
| | - J Miguel Oliveira
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco, Guimarães 4805-017, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães 4805-017, Portugal
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5
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Mooranian A, Jones M, Ionescu CM, Walker D, Wagle SR, Kovacevic B, Chester J, Foster T, Johnston E, Mikov M, Al-Salami H. Advancements in Assessments of Bio-Tissue Engineering and Viable Cell Delivery Matrices Using Bile Acid-Based Pharmacological Biotechnologies. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1861. [PMID: 34361247 PMCID: PMC8308343 DOI: 10.3390/nano11071861] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/07/2021] [Accepted: 07/14/2021] [Indexed: 12/18/2022]
Abstract
The utilisation of bioartificial organs is of significant interest to many due to their versatility in treating a wide range of disorders. Microencapsulation has a potentially significant role in such organs. In order to utilise microcapsules, accurate characterisation and analysis is required to assess their properties and suitability. Bioartificial organs or transplantable microdevices must also account for immunogenic considerations, which will be discussed in detail. One of the most characterized cases is the investigation into a bioartificial pancreas, including using microencapsulation of islets or other cells, and will be the focus subject of this review. Overall, this review will discuss the traditional and modern technologies which are necessary for the characterisation of properties for transplantable microdevices or organs, summarizing analysis of the microcapsule itself, cells and finally a working organ. Furthermore, immunogenic considerations of such organs are another important aspect which is addressed within this review. The various techniques, methodologies, advantages, and disadvantages will all be discussed. Hence, the purpose of this review is providing an updated examination of all processes for the analysis of a working, biocompatible artificial organ.
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Affiliation(s)
- Armin Mooranian
- The Biotechnology and Drug Development Research Laboratory, Curtin Medical School, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, WA 6102, Australia; (A.M.); (M.J.); (C.M.I.); (D.W.); (S.R.W.); (B.K.); (J.C.); (T.F.); (E.J.)
- Hearing Therapeutics, Ear Science Institute Australia, Queen Elizabeth II Medical Centre, Nedlands, Perth, WA 6009, Australia
| | - Melissa Jones
- The Biotechnology and Drug Development Research Laboratory, Curtin Medical School, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, WA 6102, Australia; (A.M.); (M.J.); (C.M.I.); (D.W.); (S.R.W.); (B.K.); (J.C.); (T.F.); (E.J.)
- Hearing Therapeutics, Ear Science Institute Australia, Queen Elizabeth II Medical Centre, Nedlands, Perth, WA 6009, Australia
| | - Corina Mihaela Ionescu
- The Biotechnology and Drug Development Research Laboratory, Curtin Medical School, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, WA 6102, Australia; (A.M.); (M.J.); (C.M.I.); (D.W.); (S.R.W.); (B.K.); (J.C.); (T.F.); (E.J.)
- Hearing Therapeutics, Ear Science Institute Australia, Queen Elizabeth II Medical Centre, Nedlands, Perth, WA 6009, Australia
| | - Daniel Walker
- The Biotechnology and Drug Development Research Laboratory, Curtin Medical School, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, WA 6102, Australia; (A.M.); (M.J.); (C.M.I.); (D.W.); (S.R.W.); (B.K.); (J.C.); (T.F.); (E.J.)
- Hearing Therapeutics, Ear Science Institute Australia, Queen Elizabeth II Medical Centre, Nedlands, Perth, WA 6009, Australia
| | - Susbin Raj Wagle
- The Biotechnology and Drug Development Research Laboratory, Curtin Medical School, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, WA 6102, Australia; (A.M.); (M.J.); (C.M.I.); (D.W.); (S.R.W.); (B.K.); (J.C.); (T.F.); (E.J.)
- Hearing Therapeutics, Ear Science Institute Australia, Queen Elizabeth II Medical Centre, Nedlands, Perth, WA 6009, Australia
| | - Bozica Kovacevic
- The Biotechnology and Drug Development Research Laboratory, Curtin Medical School, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, WA 6102, Australia; (A.M.); (M.J.); (C.M.I.); (D.W.); (S.R.W.); (B.K.); (J.C.); (T.F.); (E.J.)
- Hearing Therapeutics, Ear Science Institute Australia, Queen Elizabeth II Medical Centre, Nedlands, Perth, WA 6009, Australia
| | - Jacqueline Chester
- The Biotechnology and Drug Development Research Laboratory, Curtin Medical School, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, WA 6102, Australia; (A.M.); (M.J.); (C.M.I.); (D.W.); (S.R.W.); (B.K.); (J.C.); (T.F.); (E.J.)
- Hearing Therapeutics, Ear Science Institute Australia, Queen Elizabeth II Medical Centre, Nedlands, Perth, WA 6009, Australia
| | - Thomas Foster
- The Biotechnology and Drug Development Research Laboratory, Curtin Medical School, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, WA 6102, Australia; (A.M.); (M.J.); (C.M.I.); (D.W.); (S.R.W.); (B.K.); (J.C.); (T.F.); (E.J.)
- Hearing Therapeutics, Ear Science Institute Australia, Queen Elizabeth II Medical Centre, Nedlands, Perth, WA 6009, Australia
| | - Edan Johnston
- The Biotechnology and Drug Development Research Laboratory, Curtin Medical School, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, WA 6102, Australia; (A.M.); (M.J.); (C.M.I.); (D.W.); (S.R.W.); (B.K.); (J.C.); (T.F.); (E.J.)
- Hearing Therapeutics, Ear Science Institute Australia, Queen Elizabeth II Medical Centre, Nedlands, Perth, WA 6009, Australia
| | - Momir Mikov
- Department of Pharmacology, Toxicology and Clinical Pharmacology, Faculty of Medicine, University of Novi Sad, Hajduk Veljkova 3, 21101 Novi Sad, Serbia;
| | - Hani Al-Salami
- The Biotechnology and Drug Development Research Laboratory, Curtin Medical School, Curtin Health Innovation Research Institute, Curtin University, Bentley, Perth, WA 6102, Australia; (A.M.); (M.J.); (C.M.I.); (D.W.); (S.R.W.); (B.K.); (J.C.); (T.F.); (E.J.)
- Hearing Therapeutics, Ear Science Institute Australia, Queen Elizabeth II Medical Centre, Nedlands, Perth, WA 6009, Australia
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Nasiri H, Golestan L, Shahidi SA, Darjani P. Encapsulation of Lactobacillus casei in sodium alginate microcapsules: improvement of the bacterial viability under simulated gastrointestinal conditions using wild sage seed mucilage. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2021. [DOI: 10.1007/s11694-021-01022-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Castro‐Rosas J, Gómez‐Aldapa CA, Chávez‐Urbiola EA, Hernández‐Bautista M, Rodríguez‐Marín ML, Cabrera‐Canales ZE, Falfán‐Cortés RN. Characterisation, storage viabilit, and application of microspheres with
Lactobacillus paracasei
obtained by the extrusion technique. Int J Food Sci Technol 2021. [DOI: 10.1111/ijfs.14807] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Javier Castro‐Rosas
- Universidad Autónoma del Estado de Hidalgo (UAEH) ICBI. Carr. Pachuca‐Tulancingo Km 4.5 Mineral de la ReformaC.P. 42184Hidalgo México
| | - Carlos Alberto Gómez‐Aldapa
- Universidad Autónoma del Estado de Hidalgo (UAEH) ICBI. Carr. Pachuca‐Tulancingo Km 4.5 Mineral de la ReformaC.P. 42184Hidalgo México
| | - Edgar Arturo Chávez‐Urbiola
- Universidad Autónoma del Estado de Hidalgo (UAEH) ICBI. Carr. Pachuca‐Tulancingo Km 4.5 Mineral de la ReformaC.P. 42184Hidalgo México
- Catedráticos CONACYT Carr. Pachuca‐Tulancingo Km 4.5 Mineral de la ReformaC.P. 42184Hidalgo México
| | - Monserrat Hernández‐Bautista
- Universidad Autónoma del Estado de Hidalgo (UAEH) ICBI. Carr. Pachuca‐Tulancingo Km 4.5 Mineral de la ReformaC.P. 42184Hidalgo México
| | - María Luisa Rodríguez‐Marín
- Universidad Autónoma del Estado de Hidalgo (UAEH) ICBI. Carr. Pachuca‐Tulancingo Km 4.5 Mineral de la ReformaC.P. 42184Hidalgo México
- Catedráticos CONACYT Carr. Pachuca‐Tulancingo Km 4.5 Mineral de la ReformaC.P. 42184Hidalgo México
| | - Zaira Esmeralda Cabrera‐Canales
- Instituto Politécnico Nacional CICATA unidad Querétaro Cerro Blanco 141, Colinas del Cimatario Santiago de QuerétaroQro, C.P. 76090México
| | - Reyna Nallely Falfán‐Cortés
- Universidad Autónoma del Estado de Hidalgo (UAEH) ICBI. Carr. Pachuca‐Tulancingo Km 4.5 Mineral de la ReformaC.P. 42184Hidalgo México
- Catedráticos CONACYT Carr. Pachuca‐Tulancingo Km 4.5 Mineral de la ReformaC.P. 42184Hidalgo México
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Removal of Cadmium from Aqueous Solutions by Saccharomyces cerevisiae-Alginate System. MATERIALS 2019; 12:ma12244128. [PMID: 31835462 PMCID: PMC6947380 DOI: 10.3390/ma12244128] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 12/04/2019] [Accepted: 12/05/2019] [Indexed: 01/16/2023]
Abstract
The aim of this study was to determine the Cd2+ removal capacity of a biosorbent system formed by Saccharomyces cerevisiae in calcium alginate beads. The adsorption of Cd2+ by a S. cerevisiae–alginate system was tested either by batch or fixed-bed column experiments. The S. cerevisiae–alginate system was characterized using dynamic light scattering (DLS, zeta potential), size, hardness, scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy. Beads of the S. cerevisiae–alginate system showed a spherical–elliptical morphology, diameter of 1.62 ± 0.02 mm, 96% moisture, negative surface charge (−29.3 ± 2.57 mV), and texture stability during storage at 4 °C for 20 days. In batch conditions, the system adsorbed 4.3 µg of Cd2+/g of yeast–alginate beads, using a Cd2+ initial concentration of 5 mg/L. Adsorption capacity increased to 15.4 µg/g in a fixed-bed column system, removing 83% of total Cd2+. In conclusion, the yeast–alginate system is an efficient option for the removal of cadmium at low concentrations in drinking water.
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Bitar CM, Markwick KE, Treľová D, Kroneková Z, Pelach M, Selerier CM, Dietrich J, Lacík I, Hoesli CA. Development of a microchannel emulsification process for pancreatic beta cell encapsulation. Biotechnol Prog 2019; 35:e2851. [PMID: 31131558 PMCID: PMC9285764 DOI: 10.1002/btpr.2851] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/30/2019] [Accepted: 05/20/2019] [Indexed: 12/27/2022]
Abstract
In this study, we developed a high‐throughput microchannel emulsification process to encapsulate pancreatic beta cells in monodisperse alginate beads. The process builds on a stirred emulsification and internal gelation method previously adapted to pancreatic cell encapsulation. Alginate bead production was achieved by flowing a 0.5–2.5% alginate solution with cells and CaCO3 across a 1‐mm thick polytetrafluoroethylene plate with 700 × 200 μm rectangular straight‐through channels. Alginate beads ranging from 1.5–3 mm in diameter were obtained at production rates exceeding 140 mL/hr per microchannel. Compared to the stirred emulsification process, the microchannel emulsification beads had a narrower size distribution and demonstrated enhanced compressive burst strength. Both microchannel and stirred emulsification beads exhibited homogeneous profiles of 0.7% alginate concentration using an initial alginate solution concentration of 1.5%. Encapsulated beta cell viability of 89 ± 2% based on live/dead staining was achieved by minimizing the bead residence time in the acidified organic phase fluid. Microchannel emulsification is a promising method for clinical‐scale pancreatic beta cell encapsulation as well as other applications in the pharmaceutical, food, and cosmetic industries.
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Affiliation(s)
| | - Karen E. Markwick
- Department of Chemical EngineeringMcGill University Montreal Quebec Canada
| | - Dušana Treľová
- Department for Biomaterials ResearchPolymer Institute of the Slovak Academy of Sciences Bratislava Slovakia
| | - Zuzana Kroneková
- Department for Biomaterials ResearchPolymer Institute of the Slovak Academy of Sciences Bratislava Slovakia
| | - Michal Pelach
- Department for Biomaterials ResearchPolymer Institute of the Slovak Academy of Sciences Bratislava Slovakia
| | | | - James Dietrich
- Advanced Radio Frequency Systems Laboratory, CMC MicrosystemsUniversity of Manitoba Winnipeg Manitoba Canada
| | - Igor Lacík
- Department for Biomaterials ResearchPolymer Institute of the Slovak Academy of Sciences Bratislava Slovakia
| | - Corinne A. Hoesli
- Department of Chemical EngineeringMcGill University Montreal Quebec Canada
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Guillen-Romero LD, Oropeza-Guzmán MT, López-Maldonado EA, Iglesias AL, Paz-González JA, Ng T, Serena-Gómez E, Villarreal-Gómez LJ. Synthetic hydroxyapatite and its use in bioactive coatings. J Appl Biomater Funct Mater 2019; 17:2280800018817463. [PMID: 30803286 DOI: 10.1177/2280800018817463] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
An approach to solve the limitations of autologous bone grafting procedures in bone injury treatment is to develop bioactive coatings in the implantation system. The objective of this work is to compare the temperature effect on the stability of hydroxyapatite, graphene, and collagen colloidal suspensions to be used as biocompatible and bioactive coatings on a carbon fiber composite surface. Synthesized hydroxyapatite was assessed by X-ray diffraction. Zeta potential at different temperatures was evaluated. Specimens were characterized using scanning electron microscopy and Raman analysis. The results showed that the best hydroxyapatite/graphene ratio was 85/15, while those of the hydroxyapatite/collagen mixtures were 85/15. A hydroxyapatite/graphene/collagen mixture was synthesized based on these results.
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Affiliation(s)
- Luis Daniel Guillen-Romero
- 1 Escuela de Ciencias de la Ingeniería y Tecnología, Universidad Autónoma de Baja California, Unidad Valle de las Palmas, Tijuana, Baja California, México
| | | | - Eduardo Alberto López-Maldonado
- 3 Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California, Unidad Otay, Tijuana, Baja California, México
| | - Ana Leticia Iglesias
- 1 Escuela de Ciencias de la Ingeniería y Tecnología, Universidad Autónoma de Baja California, Unidad Valle de las Palmas, Tijuana, Baja California, México
| | - Juan Antonio Paz-González
- 1 Escuela de Ciencias de la Ingeniería y Tecnología, Universidad Autónoma de Baja California, Unidad Valle de las Palmas, Tijuana, Baja California, México
| | - Theodore Ng
- 4 Oakland Oral and Maxillofacial Surgery, Oakland, California, United States
| | - Eduardo Serena-Gómez
- 5 Escuela de Ciencias de la Salud, Universidad Autónoma de Baja California, Unidad Valle de las Palmas, Tijuana, Baja California, México
| | - Luis Jesús Villarreal-Gómez
- 1 Escuela de Ciencias de la Ingeniería y Tecnología, Universidad Autónoma de Baja California, Unidad Valle de las Palmas, Tijuana, Baja California, México.,3 Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California, Unidad Otay, Tijuana, Baja California, México
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Popov AL, Popova NR, Tarakina NV, Ivanova OS, Ermakov AM, Ivanov VK, Sukhorukov GB. Intracellular Delivery of Antioxidant CeO2 Nanoparticles via Polyelectrolyte Microcapsules. ACS Biomater Sci Eng 2018; 4:2453-2462. [DOI: 10.1021/acsbiomaterials.8b00489] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Anton L. Popov
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Moscow Region, Pushchino 142290, Russia
| | - Nelli R. Popova
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Moscow Region, Pushchino 142290, Russia
| | - Nadezda V. Tarakina
- School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, United Kingdom
| | - Olga S. Ivanova
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow 117901, Russia
| | - Artem M. Ermakov
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Moscow Region, Pushchino 142290, Russia
| | - Vladimir K. Ivanov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow 117901, Russia
- National Research Tomsk State University, Tomsk 634050, Russia
| | - Gleb B. Sukhorukov
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Moscow Region, Pushchino 142290, Russia
- School of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, United Kingdom
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Orive G, Emerich D, Khademhosseini A, Matsumoto S, Hernández RM, Pedraz JL, Desai T, Calafiore R, de Vos P. Engineering a Clinically Translatable Bioartificial Pancreas to Treat Type I Diabetes. Trends Biotechnol 2018; 36:445-456. [PMID: 29455936 DOI: 10.1016/j.tibtech.2018.01.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 01/11/2018] [Accepted: 01/16/2018] [Indexed: 02/06/2023]
Abstract
Encapsulating, or immunoisolating, insulin-secreting cells within implantable, semipermeable membranes is an emerging treatment for type 1 diabetes. This approach can eliminate the need for immunosuppressive drug treatments to prevent transplant rejection and overcome the shortage of donor tissues by utilizing cells derived from allogeneic or xenogeneic sources. Encapsulation device designs are being optimized alongside the development of clinically viable, replenishable, insulin-producing stem cells, for the first time creating the possibility of widespread therapeutic use of this technology. Here, we highlight the status of the most advanced and widely explored implementations of cell encapsulation with an eye toward translating the potential of this technological approach to medical reality.
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Affiliation(s)
- Gorka Orive
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain; University Institute for Regenerative Medicine and Oral Implantology - UIRMI (UPV/EHU-Fundación Eduardo Anitua), Vitoria, Spain; BTI Biotechnology Institute, Vitoria, Spain; Joint first authors and contributed equally to the paper.
| | - Dwaine Emerich
- NsGene,225 Chapman Street, Providence, RI, USA; Joint first authors and contributed equally to the paper
| | - Ali Khademhosseini
- Department of Bioengineering, Department of Chemical and Biomolecular Engineering, Henry Samueli School of Engineering and Applied Sciences, University of California-Los Angeles, Los Angeles, CA, USA; Department of Radiology, David Geffen School of Medicine, University of California-Los Angeles, Los Angeles, CA, USA; Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA, USA; California NanoSystems Institute (CNSI), University of California-Los Angeles, Los Angeles, CA, USA. http://twitter.com/@khademh
| | - Shinichi Matsumoto
- Research and Development Center, Otsuka Pharmaceutical Factory, 115 Kuguhara, Tateiwa, Muya-cho, Naruto, Tokushima 772-8601, Japan
| | - R M Hernández
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain
| | - J L Pedraz
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria-Gasteiz, Spain
| | - Tejal Desai
- University of California, San Francisco, Department of Bioengineering and Therapeutic Sciences, Byers Hall Room 203C, MC 2520, 1700 4th Street, San Francisco, CA, USA
| | - Riccardo Calafiore
- Department of Medicine, Section of Cardiovascular, Endocrine and Metabolic Clinical Physiology, Laboratory for Endocrine Cell Transplants and Biohybrid Organs, University of Perugia, Piazzale Gambuli, Perugia, Italy; Joint first authors and contributed equally to the paper
| | - Paul de Vos
- University of Groningen, Pathology and Medical Biology Section, Immunoendocrinology, Groningen, The Netherlands.
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Abstract
The principle of immunoisolation of cells is based on encapsulation of cells in immunoprotective but semipermeable membranes that protect cells from hazardous effects of the host immune system but allows ingress of nutrients and outgress of therapeutic molecules. The technology was introduced in 1933 but has only received its deserved attention for its therapeutic application for three decades now.In the past decade important advances have been made in creating capsules that provoke minimal or no inflammatory responses. There are however new emerging challenges. These challenges relate to optimal nutrition and oxygen supply as well as standardization and documentation of capsule properties.It is concluded that the proof of principle of applicability of encapsulated grafts for treatment of human disease has been demonstrated and merits optimism about its clinical potential. Further innovation requires a much more systematic approach in identifying crucial properties of capsules and cellular grafts to allow sound interpretations of the results.
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Affiliation(s)
- Paul de Vos
- Division of Immuno-Endocrinology, Departments of Pathology and Laboratory Medicine, University of Groningen, Groningen, Groningen, The Netherlands.
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Mooranian A, Negrulj R, Takechi R, Jamieson E, Morahan G, Al-Salami H. Electrokinetic potential-stabilization by bile acid-microencapsulating formulation of pancreatic β-cells cultured in high ratio poly-L-ornithine-gel hydrogel colloidal dispersion: applications in cell-biomaterials, tissue engineering and biotechnological applications. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 46:1156-1162. [PMID: 28776395 DOI: 10.1080/21691401.2017.1362416] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
INTRODUCTION Current trials for β-cell transplantation have been hindered by poor cell viability and function post-transplantation. Recently, electric charges of the microencapsulating formulation carrying β-cells have shown significant effects on cell survival and function. Thus, this study aimed at investigating the effects of electric charge, of novel colloidal formulation containing β-cells, on cell viability, biological activity and insulin release. METHODS A new formulation, containing high ratios of poly-L-ornithine, suspending electrical-stimulation hydrogel and polystyrene sulphone (1:1:0.1 ratio), was used to form microcapsules utilizing 800 V and 2000 Hz encapsulating conditions. The bile acid, ursodeoxycholic acid, was added into the microcapsules to measure its effects on electric charges. RESULTS The electric charge of the microencapsulating formulation was enhanced by bile acid addition, and resulted in better cell viability and function. CONCLUSION Ursodeoxycholic acid microencapsulated with poly-L-ornithine, suspending electrical-stimulation hydrogel and polystyrene sulphone at 1:1:0.1 ratio, using 800 V and 2000 Hz microencapsulating conditions, produced enhanced electrokinetic parameters of microcapsules with optimized cell functions. This suggests that electric charge of formulations containing pancreatic β-cell may have significant effects on cell mass and functions, post-transplantation.
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Affiliation(s)
- Armin Mooranian
- a Biotechnology and Drug Development Research Laboratory, School of Pharmacy , Curtin Health Innovation Research Institute, Curtin University , Perth , WA , Australia
| | - Rebecca Negrulj
- a Biotechnology and Drug Development Research Laboratory, School of Pharmacy , Curtin Health Innovation Research Institute, Curtin University , Perth , WA , Australia
| | - Ryu Takechi
- b School of Public Health , Curtin Health Innovation Research Institute, Curtin University , Perth , WA , Australia
| | - Emma Jamieson
- c Centre for Medical Research , University of Western Australia , Perth , WA , Australia.,d Clinical Sciences Division , The Harry Perkins Institute of Medical Research , Perth , WA , Australia
| | - Grant Morahan
- c Centre for Medical Research , University of Western Australia , Perth , WA , Australia.,d Clinical Sciences Division , The Harry Perkins Institute of Medical Research , Perth , WA , Australia
| | - Hani Al-Salami
- a Biotechnology and Drug Development Research Laboratory, School of Pharmacy , Curtin Health Innovation Research Institute, Curtin University , Perth , WA , Australia
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Mooranian A, Takechi R, Jamieson E, Morahan G, Al-Salami H. The effect of molecular weights of microencapsulating polymers on viability of mouse-cloned pancreatic β-cells: biomaterials, osmotic forces and potential applications in diabetes treatment. Pharm Dev Technol 2017; 23:145-150. [PMID: 28425308 DOI: 10.1080/10837450.2017.1321664] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Ideal cell-containing microcapsules should be capable of maintaining cell viability and exhibit significant structural stability to support cellular functionality. To date, such microcapsules remain unavailable; thus, this study used our well-established microencapsulating methods to examine a total of 32 different microencapsulating formulations and correlate polymers' molecular weights (Mwt) and UDCA addition, with cell viability and microcapsules' stability, postmicroencapsulation. METHODS MIN6 mouse-cloned pancreatic β-cells were microencapsulated using control (n = 16; without UDCA) and test (n = 16; with UDCA) different polymers. Confocal microscopic imaging, cell viability, and microcapsules' stability were assessed. RESULTS Best cell viability (>50%) was obtained at average Mwt of 50,000 g/mol (poly-l-ornithine), followed by 110,000 g/mol (poly-l-lysine). There was no linear correlation between Mwt and viability. Confocal imagining showed similar microcapsules' shape and cell distribution among all different polymers' molecular weights, which suggests that the microencapsulating method was efficient and maintained microcapsules' uniformity. UDCA addition resulted in enhanced osmotic stability of the microcapsules and improved cell viability, when the formulation contained 1% polylornithine, 1% polyethylene glycol, 20% Eudragit® NM30D, 1% polytetrafluoroethylene, or 5% pentamethylcyclopentasiloxane. CONCLUSIONS UDCA addition improved microenvironmental conditions within the microcapsules but this effect was largely dependent on the polymer systems used.
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Affiliation(s)
- Armin Mooranian
- a Biotechnology and Drug Development Research Laboratory, School of Pharmacy , Curtin Health Innovation Research Institute, Curtin University , Perth , Western Australia , Australia
| | - Ryu Takechi
- b School of Public Health , Curtin Health Innovation Research Institute, Curtin University , Perth , Western Australia , Australia
| | - Emma Jamieson
- c Harry Perkins Institute of Medical Research , Centre for Diabetes Research , Perth , Western Australia , Australia
| | - Grant Morahan
- c Harry Perkins Institute of Medical Research , Centre for Diabetes Research , Perth , Western Australia , Australia
| | - Hani Al-Salami
- a Biotechnology and Drug Development Research Laboratory, School of Pharmacy , Curtin Health Innovation Research Institute, Curtin University , Perth , Western Australia , Australia
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Nogueira GF, Prata AS, Grosso CRF. Alginate and whey protein based-multilayered particles: production, characterisation and resistance to pH, ionic strength and artificial gastric/intestinal fluid. J Microencapsul 2017; 34:151-161. [DOI: 10.1080/02652048.2017.1310945] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
| | - Ana Silvia Prata
- Department of Food Engineering, School of Food Engineering, University of Campinas, Campinas, Brazil
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Paredes-Juarez GA, de Vos P, Bulte JWM. Recent progress in the use and tracking of transplanted islets as a personalized treatment for type 1 diabetes. EXPERT REVIEW OF PRECISION MEDICINE AND DRUG DEVELOPMENT 2017; 2:57-67. [PMID: 29276781 PMCID: PMC5737787 DOI: 10.1080/23808993.2017.1302305] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Type 1 diabetes mellitus (T1DM) is an autoimmune disease in which the pancreas produces insufficient amounts of insulin. T1DM patients require exogenous sources of insulin to maintain euglycemia. Transplantation of naked or microencapsulated pancreatic islets represents an alternative paradigm to obtain an autonomous regulation of blood glucose levels in a controlled and personalized fashion. However, once transplanted, the fate of these personalized cellular therapeutics is largely unknown, justifying the development of non-invasive tracking techniques. AREAS COVERED In vivo imaging of naked pancreatic islet transplantation, monitoring of microencapsulated islet transplantation, visualizing pancreatic inflammation, imaging of molecular-genetic therapeutics, imaging of beta cell function. EXPERT COMMENTARY There are still several hurdles to overcome before (microencapsulated) islet cell transplantation will become a mainstay therapy. Non-invasive imaging methods that can track graft volume, graft rejection, graft function (insulin secretion) microcapsule engraftment, microcapsule rupture, and pancreatic inflammation are currently being developed to design the best experimental transplantation paradigms.
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Affiliation(s)
- Genaro A Paredes-Juarez
- Russell H. Morgan Department of Radiology, Division of Magnetic Resonance Research, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Paul de Vos
- University Medical Center Groningen (UMCG), Department of Pathology and Medical Biology, Section Immunoendocrinology. Hanzeplein 1, 9713 GZ, Groningen, The Netherlands
| | - Jeff W M Bulte
- Russell H. Morgan Department of Radiology, Division of Magnetic Resonance Research, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Mooranian A, Negrulj R, Al-Salami H. The impact of allylamine-bile acid combinations on cell delivery microcapsules in diabetes. J Microencapsul 2016; 33:569-574. [PMID: 27574968 DOI: 10.1080/02652048.2016.1228703] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
OBJECTIVE In a recent study, we developed a new microencapsulating method for β-cell microencapsulation, but cell viability declined rapidly, post microencapsulation, due to potential polymer-polyelectrolyte chelation and non-porous microcapsules' membranes resulting in cell apoptosis. Thus, this study tested the effects of incorporating cationic polyamine at 1% w/v, on microcapsule strength and cell viability, in the absence or presence of an anionic tertiary bile acid (ATBA) with potential cell-protective effects. METHODS 1% w/v polyamine was used without or with ATBA, to form β-cell microcapsules and physical and biological analyses was carried out 50 h post microencapsulation. RESULTS Microcapsules containing 1% w/v polyamine showed weak physical properties and low cell viability and ATBA incorporation resulted in >30% reduction in cell viability and increased levels of pro-inflammatory cytokines. CONCLUSION Neither 1% w/v polyamine nor the presence of ATBA resulted in optimised cell viability, but rather reduced cell viability, enhanced inflammation and lowered insulin secretion.
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Affiliation(s)
- Armin Mooranian
- a Biotechnology and Drug Development Research Laboratory, School of Pharmacy , Curtin Health Innovation Research Institute, Curtin University , Perth , Western Australia , Australia
| | - Rebecca Negrulj
- a Biotechnology and Drug Development Research Laboratory, School of Pharmacy , Curtin Health Innovation Research Institute, Curtin University , Perth , Western Australia , Australia
| | - Hani Al-Salami
- a Biotechnology and Drug Development Research Laboratory, School of Pharmacy , Curtin Health Innovation Research Institute, Curtin University , Perth , Western Australia , Australia
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Llacua A, de Haan BJ, Smink SA, de Vos P. Extracellular matrix components supporting human islet function in alginate-based immunoprotective microcapsules for treatment of diabetes. J Biomed Mater Res A 2016; 104:1788-96. [PMID: 26990360 DOI: 10.1002/jbm.a.35706] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 02/16/2016] [Accepted: 03/02/2016] [Indexed: 02/06/2023]
Abstract
In the pancreas, extracellular matrix (ECM) components play an import role in providing mechanical and physiological support, and also contribute to the function of islets. These ECM-connections are damaged during islet-isolation from the pancreas and are not fully recovered after encapsulation and transplantation. To promote the functional survival of human pancreatic islets, we tested different ECMs molecules in alginate-encapsulated human islets. These were laminin derived recognition sequences, IKVAV, RGD, LRE, PDSGR, collagen I sequence DGEA (0.01 - 1.0 mM), and collagen IV (50 - 200 µg/mL). Interaction with RGD and PDSGR promoted islet viability and glucose induced insulin secretion (GIIS) when it was applied at concentrations ranging from 0.01 - 1.0 mM (p < 0.05). Also the laminin sequence LRE contributed to enhanced GIIS but only at higher concentrations of 1 mM (p < 0.05). Collagen IV also had beneficial effects but only at 50 µg/ml and no further improvement was observed at higher concentrations. IKVAV and DGEA had no effects on human islets. Synergistic effects were observed by adding Collagen(IV)-RGD, Collagen(IV)-LRE, and Collagen(IV)-PDSGR to encapsulated human islets. Our results demonstrate the potential of specific ECM components in support of functional survival of human encapsulated and free islet grafts. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 1788-1796, 2016.
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Affiliation(s)
- Alberto Llacua
- Department of Pathology and Medical Biology, Immunoendocrinology, University of Groningen, Hanzeplein 1, Groningen, RB, 9700, The Netherlands
| | - Bart J de Haan
- Department of Pathology and Medical Biology, Immunoendocrinology, University of Groningen, Hanzeplein 1, Groningen, RB, 9700, The Netherlands
| | - Sandra A Smink
- Department of Pathology and Medical Biology, Immunoendocrinology, University of Groningen, Hanzeplein 1, Groningen, RB, 9700, The Netherlands
| | - Paul de Vos
- Department of Pathology and Medical Biology, Immunoendocrinology, University of Groningen, Hanzeplein 1, Groningen, RB, 9700, The Netherlands
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Mooranian A, Negrulj R, Al-Salami H. Primary Bile Acid Chenodeoxycholic Acid-Based Microcapsules to Examine β-cell Survival and the Inflammatory Response. BIONANOSCIENCE 2016. [DOI: 10.1007/s12668-016-0198-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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de Vos P, Smink AM, Paredes G, Lakey JRT, Kuipers J, Giepmans BNG, de Haan BJ, Faas MM. Enzymes for Pancreatic Islet Isolation Impact Chemokine-Production and Polarization of Insulin-Producing β-Cells with Reduced Functional Survival of Immunoisolated Rat Islet-Allografts as a Consequence. PLoS One 2016; 11:e0147992. [PMID: 26824526 PMCID: PMC4732769 DOI: 10.1371/journal.pone.0147992] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 01/11/2016] [Indexed: 11/18/2022] Open
Abstract
The primary aim of this study was to determine whether normal variations in enzyme-activities of collagenases applied for rat-islet isolation impact longevity of encapsulated islet grafts. Also we studied the functional and immunological properties of rat islets isolated with different enzyme preparations to determine whether this impacts these parameters. Rat-islets were isolated from the pancreas with two different collagenases with commonly accepted collagenase, neutral protease, and clostripain activities. Islets had a similar and acceptable glucose-induced insulin-release profile but a profound statistical significant difference in production of the chemokines IP-10 and Gro-α. The islets were studied with nanotomy which is an EM-based technology for unbiased study of ultrastructural features of islets such as cell-cell contacts, endocrine-cell condition, ER stress, mitochondrial conditions, and cell polarization. The islet-batch with higher chemokine-production had a lower amount of polarized insulin-producing β-cells. All islets had more intercellular spaces and less interconnected areas with tight cell-cell junctions when compared to islets in the pancreas. Islet-graft function was studied by implanting encapsulated and free islet grafts in rat recipients. Alginate-based encapsulated grafts isolated with the enzyme-lot inducing higher chemokine production and lower polarization survived for a two-fold shorter period of time. The lower survival-time of the encapsulated grafts was correlated with a higher influx of inflammatory cells at 7 days after implantation. Islets from the same two batches transplanted as free unencapsulated-graft, did not show any difference in survival or function in vivo. Lack of insight in factors contributing to the current lab-to-lab variation in longevity of encapsulated islet-grafts is considered to be a threat for clinical application. Our data suggest that seemingly minor variations in activity of enzymes applied for islet-isolation might contribute to longevity-variations of immunoisolated islet-grafts.
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Affiliation(s)
- Paul de Vos
- Immunoendocrinology, department of Pathology and Medical biology, University of Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands
- * E-mail:
| | - Alexandra M. Smink
- Immunoendocrinology, department of Pathology and Medical biology, University of Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands
| | - Genaro Paredes
- Immunoendocrinology, department of Pathology and Medical biology, University of Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands
| | - Jonathan R. T. Lakey
- Department of Surgery and Biomedical Engineering, University of California Irvine, Orange, CA, 92868, United States of America
| | - Jeroen Kuipers
- Department of Cell Biology, University Medical Center Groningen, University of Groningen, P. O. Box 196, 9700 AD, Groningen, The Netherlands
| | - Ben N. G. Giepmans
- Department of Cell Biology, University Medical Center Groningen, University of Groningen, P. O. Box 196, 9700 AD, Groningen, The Netherlands
| | - Bart J. de Haan
- Immunoendocrinology, department of Pathology and Medical biology, University of Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands
| | - Marijke M. Faas
- Immunoendocrinology, department of Pathology and Medical biology, University of Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands
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The Influence of Stabilized Deconjugated Ursodeoxycholic Acid on Polymer-Hydrogel System of Transplantable NIT-1 Cells. Pharm Res 2016; 33:1182-90. [PMID: 26818840 DOI: 10.1007/s11095-016-1863-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 01/19/2016] [Indexed: 12/15/2022]
Abstract
PURPOSE The encapsulation of pancreatic β-cells in biocompatible matrix has generated great interest in diabetes treatment. Our work has shown improved microcapsules when incorporating the bile acid ursodeoxycholic acid (UDCA), in terms of morphology and cell viability although cell survival remained low. Thus, the study aimed at incorporating the polyelectrolytes polyallylamine (PAA) and poly-l-ornithine (PLO), with the polymer sodium alginate (SA) and the hydrogel ultrasonic gel (USG) with UDCA and examined cell viability and functionality post microencapsulation. METHODS Microcapsules without (control) and with UDCA (test) were produced using 1% PLO, 2.5% PAA, 1.8% SA and 4.5% USG. Pancreatic β-cells were microencapsulated and the microcapsules' morphology, surface components, cellular and bile acid distribution, osmotic and mechanical stability as well as biocompatibilities, insulin production, bioenergetics and the inflammatory response were tested. RESULTS Incorporation of UDCA at 4% into a PLO-PAA-SA formulation system increased cell survival (p < 0.01), insulin production (p < 0.01), reduced the inflammatory profile (TNF-α, IFN-ϒ, IL-6 and IL-1β; p < 0.01) and improved the microcapsule physical and mechanical strength (p < 0.01). CONCLUSIONS β-cell microencapsulation using 1% PLO, 2.5% PAA, 1.8% SA, 4.5% USG and the bile acid UDCA (4%) has good potential in cell transplantation and diabetes treatment.
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Mooranian A, Negrulj R, Al-Salami H, Morahan G, Jamieson E. Designing anti-diabetic β-cells microcapsules using polystyrenic sulfonate, polyallylamine, and a tertiary bile acid: Morphology, bioenergetics, and cytokine analysis. Biotechnol Prog 2016; 32:501-9. [PMID: 26748789 DOI: 10.1002/btpr.2223] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 01/03/2016] [Indexed: 11/07/2022]
Abstract
PURPOSE Recently sodium alginate (SA)-poly-l-ornithine (PLO) microcapsules containing pancreatic β-cells that showed good morphology but low cell viability (<27%) was designed. In this study, two new polyelectrolytes, polystyrenic sulfonate (PSS; at 1%) and polyallylamine (PAA; at 2%) were incorporated into a microencapsulated-formulation, with the aim of enhancing the physical properties of the microcapsules. Following incorporation, the structural characteristics and cell viability were investigated. The effects of the anti-inflammatory bile acid, ursodeoxycholic acid (UDCA), on microcapsule morphology, size, and stability as well as β-cell biological functionality was also examined. METHODS Microcapsules were prepared using PLO-PSS-PAA-SA mixture and two types of microcapsules were produced: without UDCA (control) and with UDCA (test). Microcapsule morphology, stability, and size were examined. Cell count, microencapsulation efficiency, cell bioenergetics, and activity were also examined. RESULTS The new microcapsules showed good morphology but cell viability remained low (29% ± 3%). UDCA addition improved cell viability post-microencapsulation (42 ± 5, P < 0.01), reduced swelling (P < 0.01), improved mechanical strength (P < 0.01), increased Zeta-potential (P < 0.01), and improved stability. UDCA addition also increased insulin production (P < 0.01), bioenergetics (P < 0.01), and decreased β-cell TNF-α (P < 0.01), IFN-gamma (P < 0.01), and IL-6 (P < 0.01) secretions. CONCLUSIONS Addition of 4% UDCA to a formulation system consisting of 1.8% SA, 1% PLO, 1% PSS, and 2% PAA enhanced cell viability post-microencapsulation and resulted in a more stable formulation with enhanced encapsulated β-cell metabolism, bioenergetics, and biological activity with reduced inflammation. This suggests potential application of UDCA, when combined with SA, PLO, PSS, and PAA, in β-cell microencapsulation and diabetes treatment. © 2016 American Institute of Chemical Engineers Biotechnol. Prog., 32:501-509, 2016.
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Affiliation(s)
- Armin Mooranian
- Biotechnology and Drug Development Research Laboratory, School of Pharmacy, Curtin Health Innovation Research Inst., Curtin University, Perth, Western Australia, Australia
| | - Rebecca Negrulj
- Biotechnology and Drug Development Research Laboratory, School of Pharmacy, Curtin Health Innovation Research Inst., Curtin University, Perth, Western Australia, Australia
| | - Hani Al-Salami
- Biotechnology and Drug Development Research Laboratory, School of Pharmacy, Curtin Health Innovation Research Inst., Curtin University, Perth, Western Australia, Australia
| | - Grant Morahan
- Harry Perkins Inst. of Medical Research, Centre for Diabetes Research, Perth, Western Australia, Australia
| | - Emma Jamieson
- Harry Perkins Inst. of Medical Research, Centre for Diabetes Research, Perth, Western Australia, Australia
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Zheng H, Li S, Gao M, Ren Y, Zheng G, Xie H, Yu W, Wang X, Ma X. An improved model for exploring the effect of physicochemical properties of alginate-based microcapsules on their fibrosis formation in vivo. RSC Adv 2016. [DOI: 10.1039/c6ra19294g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An effectivein vitromodel established forexploring the effect ofthephysicochemical properties of alginate-based microcapsules on their fibrosis formation.
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Affiliation(s)
- Huizhen Zheng
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Shen Li
- Department of Endocrinology and Metabolism
- Dalian Municipal Central Hospital Affiliated of Dalian Medical University
- Dalian 116033
- P. R. China
| | - Meng Gao
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Ying Ren
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Guoshuang Zheng
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Hongguo Xie
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Weiting Yu
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Xiuli Wang
- Department of Histology and Embryology
- College of Basic Medical Science
- Dalian Medical University
- Dalian
- P. R. China
| | - Xiaojun Ma
- Laboratory of Biomedical Materials Engineering
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
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Alginate and pectin-based particles coated with globular proteins: Production, characterization and anti-oxidative properties. Food Hydrocoll 2015. [DOI: 10.1016/j.foodhyd.2014.07.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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A novel multilayer immunoisolating encapsulation system overcoming protrusion of cells. Sci Rep 2014; 4:6856. [PMID: 25358640 PMCID: PMC4215319 DOI: 10.1038/srep06856] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 10/10/2014] [Indexed: 12/23/2022] Open
Abstract
Application of alginate-microencapsulated therapeutic cells is a promising approach for diseases that require a local and constant supply of therapeutic molecules. However most conventional alginate microencapsulation systems are associated with low mechanical stability and protrusion of cells which is associated with higher surface roughness and limits their clinical application. Here we have developed a novel multilayer encapsulation system that prevents cells from protruding from capsules. The system was tested using a therapeutic protein with anti-tumor activity overexpressed in mammalian cells. The cell containing core of the multilayer capsule was formed by flexible alginate, creating a cell sustaining environment. Surrounded by a poly-L-lysine layer the flexible core was enveloped in a high-G alginate matrix that is less flexible and has higher mechanical stability, which does not support cell survival. The cells in the core of the multilayer capsule did not show growth impairment and protein production was normal for periods up to 70 days in vitro. The additional alginate layer also lowered the surface roughness compared to conventional cell containing alginate-PLL capsules. Our system provides a solution for two important, often overlooked phenomena in cell encapsulation: preventing cell protrusion and improving surface roughness.
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Spasojevic M, Paredes-Juarez GA, Vorenkamp J, de Haan BJ, Schouten AJ, de Vos P. Reduction of the inflammatory responses against alginate-poly-L-lysine microcapsules by anti-biofouling surfaces of PEG-b-PLL diblock copolymers. PLoS One 2014; 9:e109837. [PMID: 25347191 PMCID: PMC4209974 DOI: 10.1371/journal.pone.0109837] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2014] [Accepted: 09/03/2014] [Indexed: 01/12/2023] Open
Abstract
Large-scale application of alginate-poly-L-lysine (alginate-PLL) capsules used for microencapsulation of living cells is hampered by varying degrees of success, caused by tissue responses against the capsules in the host. A major cause is proinflammatory PLL which is applied at the surface to provide semipermeable properties and immunoprotection. In this study, we investigated whether application of poly(ethylene glycol)-block-poly(L-lysine hydrochloride) diblock copolymers (PEG-b-PLL) can reduce the responses against PLL on alginate-matrices. The application of PEG-b-PLL was studied in two manners: (i) as a substitute for PLL or (ii) as an anti-biofouling layer on top of a proinflammatory, but immunoprotective, semipermeable alginate-PLL100 membrane. Transmission FTIR was applied to monitor the binding of PEG-b-PLL. When applied as a substitute for PLL, strong host responses in mice were observed. These responses were caused by insufficient binding of the PLL block of the diblock copolymers confirmed by FTIR. When PEG-b-PLL was applied as an anti-biofouling layer on top of PLL100 the responses in mice were severely reduced. Building an effective anti-biofouling layer required 50 hours as confirmed by FTIR, immunocytochemistry and XPS. Our study provides new insight in the binding requirements of polyamino acids necessary to provide an immunoprotective membrane. Furthermore, we present a relatively simple method to mask proinflammatory components on the surface of microcapsules to reduce host responses. Finally, but most importantly, our study illustrates the importance of combining physicochemical and biological methods to understand the complex interactions at the capsules' surface that determine the success or failure of microcapsules applicable for cell-encapsulation.
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Affiliation(s)
- Milica Spasojevic
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands
- Departments of Pathology and Laboratory Medicine, section of Medical Biology, division of immunoendocrinology, University of Groningen, Groningen, The Netherlands
| | - Genaro A. Paredes-Juarez
- Departments of Pathology and Laboratory Medicine, section of Medical Biology, division of immunoendocrinology, University of Groningen, Groningen, The Netherlands
| | - Joop Vorenkamp
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands
| | - Bart J. de Haan
- Departments of Pathology and Laboratory Medicine, section of Medical Biology, division of immunoendocrinology, University of Groningen, Groningen, The Netherlands
| | - Arend Jan Schouten
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands
| | - Paul de Vos
- Departments of Pathology and Laboratory Medicine, section of Medical Biology, division of immunoendocrinology, University of Groningen, Groningen, The Netherlands
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Mooranian A, Negrulj R, Arfuso F, Al-Salami H. Characterization of a novel bile acid-based delivery platform for microencapsulated pancreatic β-cells. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2014; 44:194-200. [PMID: 25014218 DOI: 10.3109/21691401.2014.934457] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
INTRODUCTION In a recent study, we confirmed good chemical and physical compatibility of microencapsulated pancreatic β-cells using a novel formulation of low viscosity sodium alginate (LVSA), Poly-L-Ornithine (PLO), and the tertiary bile acid, ursodeoxycholic acid (UDCA). This study aimed to investigate the effect of UDCA on the morphology, swelling, stability, and size of these new microcapsules. It also aimed to evaluate cell viability in the microcapsules following UDCA addition. MATERIALS AND METHODS Microencapsulation was carried out using a Büchi-based system. Two (LVSA-PLO, control and LVSA-PLO-UDCA, test) pancreatic β-cells microcapsules were prepared at a constant ratio of 10:1:3, respectively. The microcapsules' morphology, cell viability, swelling characteristics, stability, mechanical strength, Zeta potential, and size analysis were examined. The cell contents in each microcapsule and the microencapsulation efficiency were also examined. RESULTS The addition of UDCA did not affect the microcapsules' morphology, stability, size, or the microencapsulation efficiency. However, UDCA enhanced cell viability in the microcapsules 24 h after microencapsulation (p < 0.01), reduced swelling (p < 0.05), reduced Zeta potential (- 73 ± 2 to - 54 ± 2 mV, p < 0.01), and increased mechanical strength of the microcapsules (p < 0.05) at the end of the 24-h experimental period. DISCUSSION AND CONCLUSION UDCA increased β-cell viability in the microcapsules without affecting the microcapsules' size, morphology, or stability. It also increased the microcapsules' resistance to swelling and optimized their mechanical strength. Our findings suggest potential benefits of the bile acid UDCA in β-cell microencapsulation.
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Affiliation(s)
- Armin Mooranian
- a Biotechnology and Drug Development Research Laboratory, School of Pharmacy, CHIRI Biosciences Research Precinct, Curtin University , Perth , WA , Australia
| | - Rebecca Negrulj
- a Biotechnology and Drug Development Research Laboratory, School of Pharmacy, CHIRI Biosciences Research Precinct, Curtin University , Perth , WA , Australia
| | - Frank Arfuso
- b Curtin Health Innovation Research Institute, Biosciences Research Precinct, School of Biomedical Science, Curtin University , Perth , WA , Australia
| | - Hani Al-Salami
- a Biotechnology and Drug Development Research Laboratory, School of Pharmacy, CHIRI Biosciences Research Precinct, Curtin University , Perth , WA , Australia
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de Vos P, Lazarjani HA, Poncelet D, Faas MM. Polymers in cell encapsulation from an enveloped cell perspective. Adv Drug Deliv Rev 2014; 67-68:15-34. [PMID: 24270009 DOI: 10.1016/j.addr.2013.11.005] [Citation(s) in RCA: 186] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 08/26/2013] [Accepted: 11/13/2013] [Indexed: 02/07/2023]
Abstract
In the past two decades, many polymers have been proposed for producing immunoprotective capsules. Examples include the natural polymers alginate, agarose, chitosan, cellulose, collagen, and xanthan and synthetic polymers poly(ethylene glycol), polyvinyl alcohol, polyurethane, poly(ether-sulfone), polypropylene, sodium polystyrene sulfate, and polyacrylate poly(acrylonitrile-sodium methallylsulfonate). The biocompatibility of these polymers is discussed in terms of tissue responses in both the host and matrix to accommodate the functional survival of the cells. Cells should grow and function in the polymer network as adequately as in their natural environment. This is critical when therapeutic cells from scarce cadaveric donors are considered, such as pancreatic islets. Additionally, the cell mass in capsules is discussed from the perspective of emerging new insights into the release of so-called danger-associated molecular pattern molecules by clumps of necrotic therapeutic cells. We conclude that despite two decades of intensive research, drawing conclusions about which polymer is most adequate for clinical application is still difficult. This is because of the lack of documentation on critical information, such as the composition of the polymer, the presence or absence of confounding factors that induce immune responses, toxicity to enveloped cells, and the permeability of the polymer network. Only alginate has been studied extensively and currently qualifies for application. This review also discusses critical issues that are not directly related to polymers and are not discussed in the other reviews in this issue, such as the functional performance of encapsulated cells in vivo. Physiological endocrine responses may indeed not be expected because of the many barriers that the metabolites encounter when traveling from the blood stream to the enveloped cells and back to circulation. However, despite these diffusion barriers, many studies have shown optimal regulation, allowing us to conclude that encapsulated grafts do not always follow nature's course but are still a possible solution for many endocrine disorders for which the minute-to-minute regulation of metabolites is mandatory.
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Zheng G, Liu X, Wang X, Chen L, Xie H, Wang F, Zheng H, Yu W, Ma X. Improving stability and biocompatibility of alginate/chitosan microcapsule by fabricating bi-functional membrane. Macromol Biosci 2014; 14:655-66. [PMID: 24436207 DOI: 10.1002/mabi.201300474] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 12/02/2013] [Indexed: 01/22/2023]
Abstract
Cell encapsulation technology holds promise for the cell-based therapy. But poor mechanical strength and biocompatibility of microcapsule membrane are still obstacles for the clinical applications. A novel strategy is presented to prepare AC₁ C₂ A microcapsules with bi-functional membrane (that is, both desirable biocompatibility and membrane stability) by sequentially complexing chitosans with higher deacetylation degree (C₁) and lower deacetylation degree (C₂) on alginate (A) gel beads. Both in vitro and in vivo evaluation of AC₁C₂ A microcapsules demonstrate higher membrane stability and less cell adhesion, because the introduction of C₂ increases membrane strength and decreases surface roughness. Moreover, diffusion test of AC₁C₂ A microcapsules displays no inward permeation of IgG protein suggesting good immunoisolation function. The results demonstrate that AC₁C₂ A microcapsules with bi-functional membrane could be a promising candidate for microencapsulated cell implantation with cost effective usage of naturally biocompatible polysaccharides.
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Affiliation(s)
- Guoshuang Zheng
- Laboratory of Biomedical Material Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China; University of the Chinese Academy of Sciences, Beijing, 100049, P. R. China
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31
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Paredes-Juarez GA, de Haan BJ, Faas MM, de Vos P. The role of pathogen-associated molecular patterns in inflammatory responses against alginate based microcapsules. J Control Release 2013; 172:983-92. [DOI: 10.1016/j.jconrel.2013.09.009] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 09/02/2013] [Accepted: 09/05/2013] [Indexed: 10/26/2022]
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32
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Therapeutic cell encapsulation: Ten steps towards clinical translation. J Control Release 2013; 170:1-14. [DOI: 10.1016/j.jconrel.2013.04.015] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Revised: 04/05/2013] [Accepted: 04/22/2013] [Indexed: 12/23/2022]
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33
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Spasojevic M, Bhujbal S, Paredes G, de Haan BJ, Schouten AJ, de Vos P. Considerations in binding diblock copolymers on hydrophilic alginate beads for providing an immunoprotective membrane. J Biomed Mater Res A 2013; 102:1887-96. [PMID: 23853069 PMCID: PMC4232034 DOI: 10.1002/jbm.a.34863] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 06/13/2013] [Accepted: 06/28/2013] [Indexed: 01/14/2023]
Abstract
Alginate-based microcapsules are being proposed for treatment of many types of diseases. A major obstacle however in the successes is that these capsules are having large lab-to-lab variations. To make the process more reproducible, we propose to cover the surface of alginate capsules with diblock polymers that can form polymer brushes. In the present study, we describe the stepwise considerations for successful application of diblock copolymer of polyethylene glycol (PEG) and poly-l-lysine (PLL) on the surface of alginate beads. Special procedures had to be designed as alginate beads are hydrophilic and most protocols are designed for hydrophobic biomaterials. The successful attachment of diblock copolymer and the presence of PEG blocks on the surface of the capsules were studied by fluorescence microscopy. Longer time periods, that is, 30–60 min, are required to achieve saturation of the surface. The block lengths influenced the strength of the capsules. Shorter PLL blocks resulted in less stable capsules. Adequate permeability of the capsules was achieved with poly(ethylene glycol)-block-poly(l-lysine hydrochloride) (PEG454-b-PLL100) diblock copolymers. The capsules were a barrier for immunoglobulin G. The PEG454-b-PLL100 capsules have similar mechanical properties as PLL capsules. Minor immune activation of nuclear factor κB in THP-1 monocytes was observed with both PLL and PEG454-b-PLL100 capsules prepared from purified alginate. Our results show that we can successfully apply block copolymers on the surface of hydrophilic alginate beads without interfering with the physicochemical properties.
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Affiliation(s)
- Milica Spasojevic
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, 9747, AG Groningen, the Netherlands; Departments of Pathology and Laboratory Medicine, Section of Medical Biology, Division of Immunoendocrinology, University of Groningen, Hanzeplein 1, 9700, RB Groningen, The Netherlands
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Yang K, Cao W, Hao X, Xue X, Zhao J, Liu J, Zhao Y, Meng J, Sun B, Zhang J, Liang XJ. Metallofullerene nanoparticles promote osteogenic differentiation of bone marrow stromal cells through BMP signaling pathway. NANOSCALE 2013; 5:1205-1212. [PMID: 23299786 DOI: 10.1039/c2nr33575a] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Although endohedral metallofullerenol [Gd@C(82)(OH)(22)](n) nanoparticles have anti-tumor efficiency and mostly deposit in the bones of mice, how these nanoparticles act in bone marrow stromal cells (MSCs) remains largely unknown. Herein, we observed that [Gd@C(82)(OH)(22)](n) nanoparticles facilitated the differentiation of MSCs toward osteoblasts, as evidenced by the enhancement of alkaline phosphatase (ALP) activity and mineralized nodule formation upon [Gd@C(82)(OH)(22)](n) nanoparticle treatment. Mechanistically, the effect of [Gd@C(82)(OH)(22)](n) nanoparticles on ALP activity was inhibited by the addition of noggin as an inhibitor of the BMP signaling pathway. Moreover, the in vivo results of the ovariectomized rats further indicated that [Gd@C(82)(OH)(22)](n) nanoparticles effectively improved bone density and prevented osteoporosis.
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Affiliation(s)
- Kangning Yang
- Laboratory of Nanomedicine and Nanosafety, Division of Nanomedicine and Nanobiology, National Center for Nanoscience and Technology of China, Chinese Academy of Sciences, No. 11, First North Road, Zhongguancun, Beijing, 100190, China
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35
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Souza FN, Gebara C, Ribeiro MC, Chaves KS, Gigante ML, Grosso CR. Production and characterization of microparticles containing pectin and whey proteins. Food Res Int 2012. [DOI: 10.1016/j.foodres.2012.07.041] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Hatziavramidis DT, Karatzas TM, Chrousos GP. Pancreatic islet cell transplantation: an update. Ann Biomed Eng 2012; 41:469-76. [PMID: 23494147 DOI: 10.1007/s10439-012-0676-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Accepted: 10/06/2012] [Indexed: 12/11/2022]
Abstract
Transplantation of pancreatic islets, as a therapeutic modality for type 1 diabetes mellitus (T1DM), at this stage of its development, is reserved for patients with severe glycemic variability, progressive diabetic complications, and life threatening hypoglycemia unawareness, regardless of intensive insulin management. It has not succeeded to become the method of choice for treating T1DM because of limited supply and suboptimal yields of procurement and isolation of islets, graft failure, and relatively high requirements, i.e., at least 10,000 functional Islet Equivalents per kg of patient weight, to achieve prolonged insulin independence and glucose stability. Efforts aimed at making islet transplantation a competitive alternative to exogenous insulin injections for treating T1DM have focused on improving the longevity and functionality of islet cells. In order to succeed, these efforts need to be complemented by others to optimize the rate and efficiency of encapsulation.
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de Vos P, Spasojevic M, de Haan BJ, Faas MM. The association between in vivo physicochemical changes and inflammatory responses against alginate based microcapsules. Biomaterials 2012; 33:5552-9. [DOI: 10.1016/j.biomaterials.2012.04.039] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Accepted: 04/13/2012] [Indexed: 12/20/2022]
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Perán M, García MA, López-Ruiz E, Bustamante M, Jiménez G, Madeddu R, Marchal JA. Functionalized nanostructures with application in regenerative medicine. Int J Mol Sci 2012; 13:3847-3886. [PMID: 22489186 PMCID: PMC3317746 DOI: 10.3390/ijms13033847] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2012] [Revised: 03/03/2012] [Accepted: 03/06/2012] [Indexed: 12/16/2022] Open
Abstract
In the last decade, both regenerative medicine and nanotechnology have been broadly developed leading important advances in biomedical research as well as in clinical practice. The manipulation on the molecular level and the use of several functionalized nanoscaled materials has application in various fields of regenerative medicine including tissue engineering, cell therapy, diagnosis and drug and gene delivery. The themes covered in this review include nanoparticle systems for tracking transplanted stem cells, self-assembling peptides, nanoparticles for gene delivery into stem cells and biomimetic scaffolds useful for 2D and 3D tissue cell cultures, transplantation and clinical application.
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Affiliation(s)
- Macarena Perán
- Department of Health Sciences, University of Jaén, Jaén E-23071, Spain; E-Mails: (M.P.); (E.L.-R.)
| | - María A. García
- Research Unit, Hospital Universitario Virgen de las Nieves, Granada E-18014, Spain; E-Mail:
| | - Elena López-Ruiz
- Department of Health Sciences, University of Jaén, Jaén E-23071, Spain; E-Mails: (M.P.); (E.L.-R.)
| | - Milán Bustamante
- Biosciences Institute, University College Cork, Cork, Ireland; E-Mail:
| | - Gema Jiménez
- Biopathology and Regenerative Medicine Institute (IBIMER), Biomedical Research Centre, University of Granada, Granada E-18100, Spain; E-Mail:
| | - Roberto Madeddu
- Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy; E-Mail:
| | - Juan A. Marchal
- Biopathology and Regenerative Medicine Institute (IBIMER), Biomedical Research Centre, University of Granada, Granada E-18100, Spain; E-Mail:
- Department of Human Anatomy and Embryology, Faculty of Medicine, University of Granada, Granada E-18012, Spain
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +34-958-249-321; Fax: +34-958-246-296
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Hoesli CA, Kiang RLJ, Mocinecová D, Speck M, Mošková DJ, Donald-Hague C, Lacík I, Kieffer TJ, Piret JM. Reversal of diabetes by βTC3 cells encapsulated in alginate beads generated by emulsion and internal gelation. J Biomed Mater Res B Appl Biomater 2012; 100:1017-28. [DOI: 10.1002/jbm.b.32667] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Revised: 11/24/2011] [Accepted: 12/10/2011] [Indexed: 11/10/2022]
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O'Sullivan ES, Vegas A, Anderson DG, Weir GC. Islets transplanted in immunoisolation devices: a review of the progress and the challenges that remain. Endocr Rev 2011; 32:827-44. [PMID: 21951347 PMCID: PMC3591674 DOI: 10.1210/er.2010-0026] [Citation(s) in RCA: 153] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The concept of using an immunoisolation device to facilitate the transplantation of islets without the need for immunosuppression has been around for more than 50 yr. Significant progress has been made in developing suitable materials that satisfy the need for biocompatibility, durability, and permselectivity. However, the search is ongoing for a device that allows sufficient oxygen transfer while maintaining a barrier to immune cells and preventing rejection of the transplanted tissue. Separating the islets from the rich blood supply in the native pancreas takes its toll. The immunoisolated islets commonly suffer from hypoxia and necrosis, which in turn triggers a host immune response. Efforts have been made to improve the supply of nutrients by using proangiogenic factors to augment the development of a vascular supply in the transplant site, by using small islet cell aggregates to reduce the barrier to diffusion of oxygen, or by creating scaffolds that are in close proximity to a vascular network such as the omental blood supply. Even if these efforts are successful, the shortage of donor islet tissue available for transplantation remains a major problem. To this end, a search for a renewable source of insulin-producing cells is ongoing; whether these will come from adult or embryonic stem cells or xenogeneic sources remains to be seen. Herein we will review the above issues and chart the progress made with various immunoisolation devices in small and large animal models and the small number of clinical trials carried out to date.
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Affiliation(s)
- Esther S O'Sullivan
- Section on Islet Transplantation and Cell Biology, Research Division, Joslin Diabetes Center and the Department of Medicine, Harvard Medical School, Boston, Massachusetts 02215, USA
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de Haan BJ, Rossi A, Faas MM, Smelt MJ, Sonvico F, Colombo P, de Vos P. Structural surface changes and inflammatory responses against alginate-based microcapsules after exposure to human peritoneal fluid. J Biomed Mater Res A 2011; 98:394-403. [DOI: 10.1002/jbm.a.33123] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Revised: 02/09/2011] [Accepted: 03/25/2011] [Indexed: 11/06/2022]
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Brun-Graeppi AKAS, Richard C, Bessodes M, Scherman D, Merten OW. Cell microcarriers and microcapsules of stimuli-responsive polymers. J Control Release 2011; 149:209-24. [DOI: 10.1016/j.jconrel.2010.09.023] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Accepted: 09/21/2010] [Indexed: 12/22/2022]
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Recent advances in the use of encapsulated cells for effective delivery of therapeutics. Ther Deliv 2010; 1:387-96. [DOI: 10.4155/tde.10.36] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Cell encapsulation can be defined as a living cell approach for the long-term delivery of therapeutic products. It consists of the immobilization of therapeutically active cells within a general polymer matrix that permits the ingress of nutrients and oxygen and the egress of therapeutic protein products but impedes the immune contact of the enclosed cells. In recent decades many attempts have evaluated the potential of this technology to release therapeutic agents for the treatment of different pathologies and disorders. At present, cell encapsulation may be used as a technological platform to improve knowledge and clinical use of stem cells. This review describes the main issues related to this cell-based approach and summarizes some of the most interesting therapeutic applications.
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Xie HG, Li XX, Lv GJ, Xie WY, Zhu J, Luxbacher T, Ma R, Ma XJ. Effect of surface wettability and charge on protein adsorption onto implantable alginate-chitosan-alginate microcapsule surfaces. J Biomed Mater Res A 2010; 92:1357-65. [PMID: 19353563 DOI: 10.1002/jbm.a.32437] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Alginate-chitosan-alginate (ACA) microcapsules have been developed as a device for the transplantation of living cells. However, protein adsorption onto the surface of microcapsules immediately upon their implantation decides their ultimate biocompatibility. In this work, the chemical composition of the ACA membranes was determined using X-ray photoelectron spectroscopy (XPS). The surface wettability and charge were determined by contact angle and zeta potential measurements, respectively. Then, the effects of surface wettability and charge on bovine fibrinogen (Fgn) and gamma globulin (IgG) adsorption onto ACA microcapsules were evaluated. The results showed that ACA microcapsules had a hydrophilic membrane. So, the surface wettability of ACA microcapsules had little effect on protein adsorption. There was a negative zeta potential of ACA microcapsules which varies with the viscosity or G content of alginate used, indicating a varying degree of net negatively charged groups on the surface of ACA microcapsules. The amount of adsorbed protein increased with increasing of positive charge. Furthermore, the interaction between proteins and ACA microcapsules is dominated by electrostatic repulsion at pH 7.4 and that is of electrostatic attraction at pH 6.0. This work could help to explain the bioincompatibility of ACA microcapsules and will play an important role in the optimization of the microcapsule design.
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Affiliation(s)
- Hong-Guo Xie
- Biotechnology Division, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, People's Republic of China
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Santos E, Zarate J, Orive G, Hernández RM, Pedraz JL. Biomaterials in Cell Microencapsulation. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2010; 670:5-21. [DOI: 10.1007/978-1-4419-5786-3_2] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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de Vos P, Spasojevic M, Faas MM. Treatment of diabetes with encapsulated islets. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2010; 670:38-53. [PMID: 20384217 DOI: 10.1007/978-1-4419-5786-3_5] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Cell encapsulation has been proposed for the treatment of a wide variety of diseases since it allows for transplantation of cells in the absence of undesired immunosuppression. The technology has been proposed to be a solution for the treatment of diabetes since it potentially allows a mandatory minute-to-minute regulation of glucose levels without side-effects. Encapsulation is based on the principle that transplanted tissue is protected for the host immune system by a semipermeable capsule. Many different concepts of capsules have been tested. During the past two decades three major approaches of encapsulation have been studied. These include (i) intravascular macrocapsules, which are anastomosed to the vascular system as AV shunt, (ii) extravascular macrocapsules, which are mostly diffusion chambers transplanted at different sites and (iii) extravascular microcapsules transplanted in the peritoneal cavity. The advantages and pitfalls of the three approaches are discussed and compared in view of applicability in clinical islet transplantation.
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Affiliation(s)
- Paul de Vos
- Department of Pathology and Laboratory Medicine, Section of Immunoendocrinology, University of Groningen. Hanzeplein 1, 9700 RB Groningen, The Netherlands.
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Murua A, Orive G, Hernández RM, Pedraz JL. Cryopreservation based on freezing protocols for the long-term storage of microencapsulated myoblasts. Biomaterials 2009; 30:3495-501. [DOI: 10.1016/j.biomaterials.2009.03.005] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2008] [Accepted: 03/07/2009] [Indexed: 11/25/2022]
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Tam SK, de Haan BJ, Faas MM, Hallé JP, Yahia L, de Vos P. Adsorption of human immunoglobulin to implantable alginate-poly-L-lysine microcapsules: effect of microcapsule composition. J Biomed Mater Res A 2009; 89:609-15. [PMID: 18435412 DOI: 10.1002/jbm.a.32002] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Alginate-poly-L-lysine-alginate (APA) microcapsules continue to be the most widely studied device for the immuno-protection of transplanted therapeutic cells. Producing APA microcapsules having a reproducible and high level of biocompatibility requires an understanding of the mechanisms of the immune response towards the implants. Here, we investigate the adsorption of immunoglobulins (IgG, IgM, and IgA) onto the surface of APA microcapsules in vitro after their exposure to human serum and peritoneal fluid. Immunoglobulins (Ig) are considered to be opsonizing proteins, thus they tend to mediate inflammation when adsorbed to foreign surfaces. Ig adsorption was monitored using direct immunofluorescence. The amount of Ig adsorbed to the microcapsule surface was not significantly influenced by the guluronic acid content nor the purity level of the alginate, although microcapsules of intermediate-G purified alginate corresponded with the lowest adsorption levels. Ig adsorption was negligible when the poly-L-lysine membrane was omitted, suggesting that positive charges at the microcapsule surface are responsible for binding Ig.
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Affiliation(s)
- Susan K Tam
- Biomedical Engineering Institute, Ecole Polytechnique de Montréal, Québec, Canada.
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de Vos P, Faas MM, Strand B, Calafiore R. Alginate-based microcapsules for immunoisolation of pancreatic islets. Biomaterials 2006; 27:5603-17. [PMID: 16879864 DOI: 10.1016/j.biomaterials.2006.07.010] [Citation(s) in RCA: 350] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2006] [Accepted: 07/11/2006] [Indexed: 01/12/2023]
Abstract
Transplantation of microencapsulated cells is proposed as a therapy for the treatment of a wide variety of diseases since it allows for transplantation of endocrine cells in the absence of undesired immunosuppression. The technology is based on the principle that foreign cells are protected from the host immune system by an artificial membrane. In spite of the simplicity of the concept, progress in the field of immunoisolation has been hampered for many years due to biocompatibility issues. During the last years important advances have been made in the knowledge of the characteristics and requirements capsules have to meet in order to provide optimal biocompatibility and survival of the enveloped tissue. Novel insight shows that not only the capsules material but also the enveloped cells should be hold responsible for loss of a significant portion of the immunoisolated cells and, thus, failure of the grafts on the long term. Microcapsules without cells can be produced as such that they remain free of any significant foreign body response for prolonged periods of time in both experimental animals and humans. New approaches in which newly discovered inflammatory responses are silenced bring the technology of transplantation of immunoisolated cells close to clinical application.
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Affiliation(s)
- Paul de Vos
- Department of Pathology and Laboratory Medicine, Division of Medical Biology, University Hospital of Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands.
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