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Choi D, Gwon K, Hong HJ, Baskaran H, Calvo-Lozano O, Gonzalez-Suarez AM, Park K, de Hoyos-Vega JM, Lechuga LM, Hong J, Stybayeva G, Revzin A. Coating Bioactive Microcapsules with Tannic Acid Enhances the Phenotype of the Encapsulated Pluripotent Stem Cells. ACS Appl Mater Interfaces 2022; 14:10.1021/acsami.2c06783. [PMID: 35658394 PMCID: PMC10314364 DOI: 10.1021/acsami.2c06783] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Human pluripotent stem cells (hPSCs) may be differentiated into any adult cell type and therefore hold incredible promise for cell therapeutics and disease modeling. There is increasing interest in three-dimensional (3D) hPSC culture because of improved differentiation outcomes and potential for scale up. Our team has recently described bioactive heparin (Hep)-containing core-shell microcapsules that promote rapid aggregation of stem cells into spheroids and may also be loaded with growth factors for the local and sustained delivery to the encapsulated cells. In this study, we explored the possibility of further modulating bioactivity of microcapsules through the use of an ultrathin coating composed of tannic acid (TA). Deposition of the TA film onto model substrates functionalized with Hep and poly(ethylene glycol) was characterized by ellipsometry and atomic force microscopy. Furthermore, the presence of the TA coating was observed to increase the amount of basic fibroblast growth factor (bFGF) incorporation by up to twofold and to extend its release from 5 to 7 days. Most significantly, TA-microcapsules loaded with bFGF induced higher levels of pluripotency expression compared to uncoated microcapsules containing bFGF. Engineered microcapsules described here represent a new stem cell culture approach that enables 3D cultivation and relies on local delivery of inductive cues.
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Affiliation(s)
- Daheui Choi
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, United States
| | - Kihak Gwon
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, United States
| | - Hye Jin Hong
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, United States
| | - Harihara Baskaran
- Department of Chemical and Biomolecular Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Olalla Calvo-Lozano
- Nanobiosensors and Bioanalytical Applications Group (NanoB2A), Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, CIBERBBN and BIST, Barcelona 08193, Spain
| | - Alan M Gonzalez-Suarez
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, United States
| | - Kyungtae Park
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Jose M de Hoyos-Vega
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, United States
| | - Laura M Lechuga
- Nanobiosensors and Bioanalytical Applications Group (NanoB2A), Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, CIBERBBN and BIST, Barcelona 08193, Spain
| | - Jinkee Hong
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Gulnaz Stybayeva
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, United States
| | - Alexander Revzin
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, United States
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Smink AM, Li S, Swart DH, Hertsig DT, de Haan BJ, Kamps JAAM, Schwab L, van Apeldoorn AA, de Koning E, Faas MM, Lakey JRT, de Vos P. Stimulation of vascularization of a subcutaneous scaffold applicable for pancreatic islet-transplantation enhances immediate post-transplant islet graft function but not long-term normoglycemia. J Biomed Mater Res A 2017; 105:2533-2542. [PMID: 28470672 PMCID: PMC5575460 DOI: 10.1002/jbm.a.36101] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 03/20/2017] [Accepted: 04/26/2017] [Indexed: 12/22/2022]
Abstract
The liver as transplantation site for pancreatic islets is associated with significant loss of islets, which can be prevented by grafting in a prevascularized, subcutaneous scaffold. Supporting vascularization of a scaffold to limit the period of ischemia is challenging and was developed here by applying liposomes for controlled release of angiogenic factors. The angiogenic capacity of platelet-derived growth factor, vascular endothelial growth factor, acidic fibroblast growth factor (aFGF), and basic FGF were compared in a tube formation assay. Furthermore, the release kinetics of different liposome compositions were tested. aFGF and L-α-phosphatidylcholine/cholesterol liposomes were selected to support vascularization. Two dosages of aFGF-liposomes (0.5 and 1.0 μg aFGF per injection) were administered weekly for a month after which islets were transplanted. We observed enhanced efficacy in the immediate post-transplant period compared to the untreated scaffolds. However, on the long-term, glucose levels of the aFGF treated animals started to increase to diabetic levels. These results suggest that injections with aFGF liposomes do improve vascularization and the immediate restoration of blood glucose levels but does not facilitate the long-term survival of islets. Our data emphasize the need for long-term studies to evaluate potential beneficial and adverse effects of vascularization protocols of scaffolds. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 2533-2542, 2017.
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Affiliation(s)
- Alexandra M Smink
- Department of Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Shiri Li
- Department of Surgery, University of California Irvine, Orange
| | - Daniël H Swart
- Department of Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | | | - Bart J de Haan
- Department of Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Jan A A M Kamps
- Department of Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | | | - Aart A van Apeldoorn
- Department of Developmental BioEngineering, Faculty of Science and Technology, University of Twente, Enschede, The Netherlands
| | - Eelco de Koning
- Department of Nephrology, Leiden University Medical Center, Leiden, The Netherlands
| | - Marijke M Faas
- Department of Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.,Department of Obstetrics and Gynaecology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Jonathan R T Lakey
- Department of Surgery, University of California Irvine, Orange.,Department of Biomedical Engineering, University of California Irvine, Irvine
| | - Paul de Vos
- Department of Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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