1
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Kang NW, Jang K, Song E, Han U, Seo YA, Chen F, Wungcharoen T, Heilshorn SC, Myung D. In Situ-Forming, Bioorthogonally Cross-linked, Nanocluster-Reinforced Hydrogel for the Regeneration of Corneal Defects. ACS NANO 2024. [PMID: 39106436 DOI: 10.1021/acsnano.4c02345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/09/2024]
Abstract
Corneal defects can lead to stromal scarring and vision loss, which is currently only treatable with a cadaveric corneal transplant. Although in situ-forming hydrogels have been shown to foster regeneration of the cornea in the setting of stromal defects, the cross-linking, biomechanical, and compositional parameters that optimize healing have not yet been established. This, Corneal defects are also almost universally inflamed, and their rapid closure without fibrosis are critical to preserving vision. Here, an in situ forming, bioorthogonally cross-linked, nanocluster (NC)-reinforced collagen and hyaluronic acid hydrogel (NCColHA hydrogel) with enhanced structural integrity and both pro-regenerative and anti-inflammatory effects was developed and tested within a corneal defect model in vivo. The NCs serve as bioorthogonal nanocross-linkers, providing higher cross-linking density than polymer-based alternatives. The NCs also serve as delivery vehicles for prednisolone (PRD) and the hepatocyte growth factor (HGF). NCColHA hydrogels rapidly gel within a few minutes upon administration and exhibit robust rheological properties, excellent transparency, and negligible swelling/deswelling behavior. The hydrogel's biocompatibility and capacity to support cell growth were assessed using primary human corneal epithelial cells. Re-epithelialization on the NCColHA hydrogel was clearly observed in rabbit eyes, both ex vivo and in vivo, with expression of normal epithelial biomarkers, including CD44, CK12, CK14, α-SMA, Tuj-1, and ZO-1, and stratified, multilayered morphology. The applied hydrogel maintained its structural integrity for at least 14 days and remodeled into a transparent stroma by 56 days.
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Affiliation(s)
- Nae-Won Kang
- Department of Ophthalmology, Spencer Center for Vision Research, Byers Eye Institute, Stanford University, Palo Alto, California 94304, United States
| | - Kyeongwoo Jang
- Department of Ophthalmology, Spencer Center for Vision Research, Byers Eye Institute, Stanford University, Palo Alto, California 94304, United States
| | - Euisun Song
- Department of Ophthalmology, Spencer Center for Vision Research, Byers Eye Institute, Stanford University, Palo Alto, California 94304, United States
| | - Uiyoung Han
- Department of Ophthalmology, Spencer Center for Vision Research, Byers Eye Institute, Stanford University, Palo Alto, California 94304, United States
| | - Youngyoon Amy Seo
- Department of Ophthalmology, Spencer Center for Vision Research, Byers Eye Institute, Stanford University, Palo Alto, California 94304, United States
| | - Fang Chen
- Department of Ophthalmology, Spencer Center for Vision Research, Byers Eye Institute, Stanford University, Palo Alto, California 94304, United States
| | - Thitima Wungcharoen
- Department of Ophthalmology, Spencer Center for Vision Research, Byers Eye Institute, Stanford University, Palo Alto, California 94304, United States
| | - Sarah C Heilshorn
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - David Myung
- Department of Ophthalmology, Spencer Center for Vision Research, Byers Eye Institute, Stanford University, Palo Alto, California 94304, United States
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
- VA Palo Alto HealthCare System, Palo Alto, California 94304, United States
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2
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Bernhard S, Ritter L, Müller M, Guo W, Guzzi EA, Bovone G, Tibbitt MW. Modular and Photoreversible Polymer-Nanoparticle Hydrogels via Host-Guest Interactions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2401870. [PMID: 39031540 DOI: 10.1002/smll.202401870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 06/28/2024] [Indexed: 07/22/2024]
Abstract
Polymer-nanoparticle (PNP) hydrogels are a class of nanocomposite materials showing potential as injectable platforms for biomedical applications. Their design is limited by incomplete knowledge of how the binding motif impacts the viscoelastic properties of the material and is generally constrained to non-responsive supramolecular interactions. Expanding the scope of available interactions and advancing the understanding of how defined interactions influence network formation would accelerate PNP hydrogel design. To address this gap in the design of PNP hydrogels, the study designs and investigates a tunable platform based on beta-cyclodextrin (βCD) host-guest cross-links between functionalized polymers and nanoparticles. A host-functionalized polymer (βCD hyaluronic acid) and guest harboring block co-polymer (poly(ethylene glycol)-b-poly(lactic acid)) NPs are synthesized. The presence and accessibility for binding of the host and guest moieties are characterized via isothermal titration calorimetry. PNP hydrogels with varying concentrations of functionalized polymer and NPs reveal a limited window of concentrations for gelation. It is hypothesized that network formation is governed by the capacity of polymer chains to effectively bridge NPs, which is related to the host-guest ratios present in the system. Further, photo-responsive guests are incorporated to engineer photoreversible gelation of PNP hydrogels via exposure to specific wavelengths of light.
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Affiliation(s)
- Stéphane Bernhard
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Lauritz Ritter
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Marco Müller
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Wenqing Guo
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Elia A Guzzi
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Giovanni Bovone
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Mark W Tibbitt
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
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3
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Sen S, Dong C, D’Aquino AI, Yu AC, Appel EA. Biomimetic Non-ergodic Aging by Dynamic-to-covalent Transitions in Physical Hydrogels. ACS APPLIED MATERIALS & INTERFACES 2024; 16:32599-32610. [PMID: 38862125 PMCID: PMC11212625 DOI: 10.1021/acsami.4c03303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 04/16/2024] [Accepted: 05/04/2024] [Indexed: 06/13/2024]
Abstract
Hydrogels are soft materials engineered to suit a multitude of applications that exploit their tunable mechanochemical properties. Dynamic hydrogels employing noncovalent, physically cross-linked networks dominated by either enthalpic or entropic interactions enable unique rheological and stimuli-responsive characteristics. In contrast to enthalpy-driven interactions that soften with increasing temperature, entropic interactions result in largely temperature-independent mechanical properties. By engineering interfacial polymer-particle interactions, we can induce a dynamic-to-covalent transition in entropic hydrogels that leads to biomimetic non-ergodic aging in the microstructure without altering the network mesh size. This transition is tuned by varying temperature and formulation conditions such as pH, which allows for multivalent tunability in properties. These hydrogels can thus be designed to exhibit either temperature-independent metastable dynamic cross-linking or time-dependent stiffening based on formulation and storage conditions, all while maintaining structural features critical for controlling mass transport, akin to many biological tissues. Such robust materials with versatile and adaptable properties can be utilized in applications such as wildfire suppression, surgical adhesives, and depot-forming injectable drug delivery systems.
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Affiliation(s)
- Samya Sen
- Department
of Materials Science & Engineering, Stanford University, Stanford, California 94305, United States
| | - Changxin Dong
- Department
of Materials Science & Engineering, Stanford University, Stanford, California 94305, United States
| | - Andrea I. D’Aquino
- Department
of Materials Science & Engineering, Stanford University, Stanford, California 94305, United States
| | - Anthony C. Yu
- Department
of Materials Science & Engineering, Stanford University, Stanford, California 94305, United States
| | - Eric A. Appel
- Department
of Materials Science & Engineering, Stanford University, Stanford, California 94305, United States
- Department
of Bioengineering, Stanford University, Stanford, California 94305, United States
- Stanford
ChEM-H, Stanford University, Stanford, California 94305, United States
- Institute
for Immunity, Transplantation and Infection, Stanford University School of Medicine, Stanford, California 94305, United States
- Department
of Pediatrics—Endocrinology, Stanford
University School of Medicine, Stanford, California 94305, United States
- Woods Institute
for the Environment, Stanford University, Stanford, California 94305, United States
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4
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Dravid AA, Singh A, García AJ. Biomaterial-Based Therapeutic Delivery of Immune Cells. Adv Healthc Mater 2024:e2400586. [PMID: 38813869 DOI: 10.1002/adhm.202400586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 05/15/2024] [Indexed: 05/31/2024]
Abstract
Immune cell therapy (ICT) is a transformative approach used to treat a wide range of diseases including type 1 diabetes, sickle cell disease, disorders of the hematopoietic system, and certain forms of cancers. Despite excellent clinical successes, the scope of adoptively transferred immune cells is limited because of toxicities like cytokine release syndrome and immune effector cell-associated neurotoxicity in patients. Furthermore, reports suggest that such treatment can impact major organ systems including cardiac, renal, pulmonary, and hepatic systems in the long term. Additionally, adoptively transferred immune cells cannot achieve significant penetration into solid tissues, thus limiting their therapeutic potential. Recent studies suggest that biomaterial-assisted delivery of immune cells can address these challenges by reducing toxicity, improving localization, and maintaining desired phenotypes to eventually regain tissue function. In this review, recent efforts in the field of biomaterial-based immune cell delivery for the treatment of diseases, their pros and cons, and where these approaches stand in terms of clinical treatment are highlighted.
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Affiliation(s)
- Ameya A Dravid
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Ankur Singh
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Andrés J García
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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5
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Ku KS, Tang J, Chen Y, Shi Y. Current Advancements in Anti-Cancer Chimeric Antigen Receptor T Cell Immunotherapy and How Nanotechnology May Change the Game. Int J Mol Sci 2024; 25:5361. [PMID: 38791398 PMCID: PMC11120994 DOI: 10.3390/ijms25105361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 04/27/2024] [Accepted: 05/11/2024] [Indexed: 05/26/2024] Open
Abstract
Chimeric antigen receptor (CAR)-T cell immunotherapy represents a cutting-edge advancement in the landscape of cancer treatment. This innovative therapy has shown exceptional promise in targeting and eradicating malignant tumors, specifically leukemias and lymphomas. However, despite its groundbreaking successes, (CAR)-T cell therapy is not without its challenges. These challenges, particularly pronounced in the treatment of solid tumors, include but are not limited to, the selection of appropriate tumor antigens, managing therapy-related toxicity, overcoming T-cell exhaustion, and addressing the substantial financial costs associated with treatment. Nanomedicine, an interdisciplinary field that merges nanotechnology with medical science, offers novel strategies that could potentially address these limitations. Its application in cancer treatment has already led to significant advancements, including improved specificity in drug targeting, advancements in cancer diagnostics, enhanced imaging techniques, and strategies for long-term cancer prevention. The integration of nanomedicine with (CAR)-T cell therapy could revolutionize the treatment landscape by enhancing the delivery of genes in (CAR)-T cell engineering, reducing systemic toxicity, and alleviating the immunosuppressive effects within the tumor microenvironment. This review aims to explore how far (CAR)-T cell immunotherapy has come alone, and how nanomedicine could strengthen it into the future. Additionally, the review will examine strategies to limit the off-target effects and systemic toxicity associated with (CAR)-T cell therapy, potentially enhancing patient tolerance and treatment outcomes.
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Affiliation(s)
- Kimberly S. Ku
- College of Medicine, California Northstate University, Elk Grove, CA 95757, USA; (K.S.K.); (J.T.)
| | - Jie Tang
- College of Medicine, California Northstate University, Elk Grove, CA 95757, USA; (K.S.K.); (J.T.)
| | - Yuan Chen
- Section Pathology of the Institute of Forensic Medicine, Jena University Hospital, Friedrich Schiller University Jena, Am Klinikum 1, 07747 Jena, Germany;
| | - Yihui Shi
- College of Medicine, California Northstate University, Elk Grove, CA 95757, USA; (K.S.K.); (J.T.)
- California Pacific Medical Center Research Institute, Sutter Bay Hospitals, San Francisco, CA 94107, USA
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6
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Zheng H, Li M, Wu L, Liu W, Liu Y, Gao J, Lu Z. Progress in the application of hydrogels in immunotherapy of gastrointestinal tumors. Drug Deliv 2023; 30:2161670. [PMID: 36587630 PMCID: PMC9809389 DOI: 10.1080/10717544.2022.2161670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Gastrointestinal tumors are the most common cancers with the highest morbidity and mortality worldwide. Surgery accompanied by chemotherapy, radiotherapy and targeted therapy remains the first option for gastrointestinal tumors. However, poor specificity for tumor cells of these postoperative treatments often leads to severe side effects and poor prognosis. Tumor immunotherapy, including checkpoint blockade and tumor vaccines, has developed rapidly in recent years, showing good curative effects and minimal side effects in the treatment of gastrointestinal tumors. National Comprehensive Cancer Network guidelines recommend tumor immunotherapy as part of the treatment of gastrointestinal tumors. However, the heterogeneity of tumor cells, complicacy of the tumor microenvironment and poor tumor immunogenicity hamper the effectiveness of tumor immunotherapy. Hydrogels, defined as three-dimensional, hydrophilic, and water-insoluble polymeric networks, could significantly improve the overall response rate of immunotherapy due to their superior drug loading efficacy, controlled release and drug codelivery ability. In this article, we briefly describe the research progress made in recent years on hydrogel delivery systems in immunotherapy for gastrointestinal tumors and discuss the potential future application prospects and challenges to provide a reference for the clinical application of hydrogels in tumor immunotherapy.
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Affiliation(s)
- Hao Zheng
- Department of General Surgery, Shanghai Changhai Hospital, Naval Medical University, Shanghai, China
| | - Meng Li
- Department of Dermatology, Shanghai Ninth People’s Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Lili Wu
- Changhai Clinical Research Unit, Shanghai Changhai Hospital, Naval Medical University, Shanghai, China
| | - Wenshang Liu
- Department of Dermatology, Shanghai Ninth People’s Hospital, Shanghai Jiaotong University, Shanghai, China
| | - Yu Liu
- Department of Gastroenterology, Jinling Hospital, Medical School of Nanjing University, Jiangsu, China
| | - Jie Gao
- Changhai Clinical Research Unit, Shanghai Changhai Hospital, Naval Medical University, Shanghai, China,Jie Gao Changhai Clinical Research Unit, Shanghai Changhai Hospital, Naval Medical University, Shanghai200433, China
| | - Zhengmao Lu
- Department of General Surgery, Shanghai Changhai Hospital, Naval Medical University, Shanghai, China,CONTACT Zhengmao Lu Department of General Surgery, Shanghai Changhai Hospital, Naval Medical University, Shanghai200433, China
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7
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Morley CD, Ding EA, Carvalho EM, Kumar S. A Balance between Inter- and Intra-Microgel Mechanics Governs Stem Cell Viability in Injectable Dynamic Granular Hydrogels. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2304212. [PMID: 37653580 PMCID: PMC10841739 DOI: 10.1002/adma.202304212] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 08/25/2023] [Indexed: 09/02/2023]
Abstract
Injectable hydrogels are increasingly explored for the delivery of cells to tissue. These materials exhibit both liquid-like properties, protecting cells from mechanical stress during injection, and solid-like properties, providing a stable 3D engraftment niche. Many strategies for modulating injectable hydrogels tune liquid- and solid-like material properties simultaneously, such that formulation changes designed to improve injectability can reduce stability at the delivery site. The ability to independently tune liquid- and solid-like properties would greatly facilitate formulation development. Here, such a strategy is presented in which cells are ensconced in the pores between microscopic granular hyaluronic acid (HA) hydrogels (microgels), where elasticity is tuned with static covalent intra-microgel crosslinks and flowability with mechanosensitive adamantane-cyclodextrin (AC) inter-microgel crosslinks. Using the same AC-free microgels as a 3D printing support bath, the location of each cell is preserved as it exits the needle, allowing identification of the mechanism driving mechanical trauma-induced cell death. The microgel AC concentration is varied to find the threshold from microgel yielding- to AC interaction-dominated injectability, and this threshold is exploited to fabricate a microgel with better injection-protecting performance. This delivery strategy, and the balance between intra- and inter-microgel properties it reveals, may facilitate the development of new cell injection formulations.
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Affiliation(s)
- Cameron D Morley
- Department of Bioengineering, University of California, Berkeley, CA, 94720, USA
| | - Erika A Ding
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA, 94720, USA
| | - Emily M Carvalho
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA, 94720, USA
| | - Sanjay Kumar
- Department of Bioengineering, University of California, Berkeley, CA, 94720, USA
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA, 94720, USA
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA, 94158, USA
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8
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Lee HP, Cai KX, Wang TC, Davis R, Deo K, Singh KA, Lele TP, Gaharwar AK. Dynamically crosslinked thermoresponsive granular hydrogels. J Biomed Mater Res A 2023; 111:1577-1587. [PMID: 37199446 DOI: 10.1002/jbm.a.37556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 03/30/2023] [Accepted: 04/29/2023] [Indexed: 05/19/2023]
Abstract
Granular hydrogels are a promising biomaterial for a wide range of biomedical applications, including tissue regeneration, drug/cell delivery, and 3D printing. These granular hydrogels are created by assembling microgels through the jamming process. However, current methods for interconnecting the microgels often limit their use due to the reliance on postprocessing for crosslinking through photoinitiated reactions or enzymatic catalysis. To address this limitation, we incorporated a thiol-functionalized thermo-responsive polymer into oxidized hyaluronic acid microgel assemblies. The rapid exchange rate of thiol-aldehyde dynamic covalent bonds allows the microgel assembly to be shear-thinning and self-healing, with the phase transition behavior of the thermo-responsive polymer serving as secondary crosslinking to stabilize the granular hydrogels network at body temperature. This two-stage crosslinking system provides excellent injectability and shape stability, while maintaining mechanical integrity. In addition, the aldehyde groups of the microgels act as covalent binding sites for sustained drug release. These granular hydrogels can be used as scaffolds for cell delivery and encapsulation, and can be 3D printed without the need for post-printing processing to maintain mechanical stability. Overall, our work introduces thermo-responsive granular hydrogels with promising potential for various biomedical applications.
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Affiliation(s)
- Hung-Pang Lee
- Biomedical Engineering, College of Engineering, Texas A&M University, College Station, Texas, USA
| | - Kathy Xiao Cai
- Biomedical Engineering, College of Engineering, Texas A&M University, College Station, Texas, USA
| | - Ting-Ching Wang
- Chemical Engineering, College of Engineering, Texas A&M University, College Station, Texas, USA
| | - Ryan Davis
- Biomedical Engineering, College of Engineering, Texas A&M University, College Station, Texas, USA
| | - Kaivalya Deo
- Biomedical Engineering, College of Engineering, Texas A&M University, College Station, Texas, USA
| | - Kanwar Abhay Singh
- Biomedical Engineering, College of Engineering, Texas A&M University, College Station, Texas, USA
| | - Tanmay P Lele
- Biomedical Engineering, College of Engineering, Texas A&M University, College Station, Texas, USA
- Chemical Engineering, College of Engineering, Texas A&M University, College Station, Texas, USA
- Department of Translational Medical Sciences, Texas A&M University, Houston, Texas, USA
| | - Akhilesh K Gaharwar
- Biomedical Engineering, College of Engineering, Texas A&M University, College Station, Texas, USA
- Material Science and Engineering, College of Engineering, Texas A&M University, College Station, Texas, USA
- Interdisciplinary Graduate Program in Genetics & Genomics, Texas A&M University, College Station, Texas, USA
- Center for Remote Health Technologies and Systems, Texas A&M University, College Station, Texas, USA
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9
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Martin KE, Hunckler MD, Chee E, Caplin JD, Barber GF, Kalelkar PP, Schneider RS, García AJ. Hydrolytic hydrogels tune mesenchymal stem cell persistence and immunomodulation for enhanced diabetic cutaneous wound healing. Biomaterials 2023; 301:122256. [PMID: 37517209 PMCID: PMC10529272 DOI: 10.1016/j.biomaterials.2023.122256] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 07/20/2023] [Accepted: 07/23/2023] [Indexed: 08/01/2023]
Abstract
Diabetes is associated with an altered global inflammatory state with impaired wound healing. Mesenchymal stem/stromal cells (MSC) are being explored for treatment of diabetic cutaneous wounds due to their regenerative properties. These cells are commonly delivered by injection, but the need to prolong the retention of MSC at sites of injury has spurred the development of biomaterial-based MSC delivery vehicles. However, controlling biomaterial degradation rates in vivo remains a therapeutic-limiting challenge. Here, we utilize hydrolytically degradable ester linkages to engineer synthetic hydrogels with tunable in vivo degradation kinetics for temporally controlled delivery of MSC. In vivo hydrogel degradation rate can be controlled by altering the ratio of ester to amide linkages in the hydrogel macromers. These hydrolytic hydrogels degrade at rates that enable unencumbered cutaneous wound healing, while enhancing the local persistence MSC compared to widely used protease-degradable hydrogels. Furthermore, hydrogel-based delivery of MSC modulates local immune responses and enhances cutaneous wound repair in diabetic mice. This study introduces a simple strategy for engineering tunable degradation modalities into synthetic biomaterials, overcoming a key barrier to their use as cell delivery vehicles.
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Affiliation(s)
- Karen E Martin
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA; Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Michael D Hunckler
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA; Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Eunice Chee
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA; Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Jeremy D Caplin
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA; Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Graham F Barber
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA; Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Pranav P Kalelkar
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA; Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Rebecca S Schneider
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA; School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Andrés J García
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA; Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA.
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10
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Schluck M, Weiden J, Verdoes M, Figdor CG. Insights in the host response towards biomaterial-based scaffolds for cancer therapy. Front Bioeng Biotechnol 2023; 11:1149943. [PMID: 37342507 PMCID: PMC10277494 DOI: 10.3389/fbioe.2023.1149943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 05/23/2023] [Indexed: 06/23/2023] Open
Abstract
Immunotherapeutic strategies have shown promising results in the treatment of cancer. However, not all patients respond, and treatments can have severe side-effects. Adoptive cell therapy (ACT) has shown remarkable therapeutic efficacy across different leukaemia and lymphoma types. But the treatment of solid tumours remains a challenge due to limited persistence and tumour infiltration. We believe that biomaterial-based scaffolds are promising new tools and may address several of the challenges associated with cancer vaccination and ACT. In particular, biomaterial-based scaffold implants allow for controlled delivery of activating signals and/or functional T cells at specific sites. One of the main challenges for their application forms the host response against these scaffolds, which includes unwanted myeloid cell infiltration and the formation of a fibrotic capsule around the scaffold, thereby limiting cell traffic. In this review we provide an overview of several of the biomaterial-based scaffolds designed for cancer therapy to date. We will discuss the host responses observed and we will highlight design parameters that influence this response and their potential impact on therapeutic outcome.
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Affiliation(s)
- Marjolein Schluck
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Nijmegen, Netherlands
- Oncode Institute, Nijmegen, Netherlands
- Institute for Chemical Immunology, Nijmegen, Netherlands
| | - Jorieke Weiden
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Nijmegen, Netherlands
- Oncode Institute, Nijmegen, Netherlands
- Institute for Chemical Immunology, Nijmegen, Netherlands
| | - Martijn Verdoes
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Nijmegen, Netherlands
- Institute for Chemical Immunology, Nijmegen, Netherlands
| | - Carl G. Figdor
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Nijmegen, Netherlands
- Oncode Institute, Nijmegen, Netherlands
- Institute for Chemical Immunology, Nijmegen, Netherlands
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11
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Zhang L, Hajebrahimi S, Tong S, Gao X, Cheng H, Zhang Q, Hinojosa DT, Jiang K, Hong L, Huard J, Bao G. Force-Mediated Endocytosis of Iron Oxide Nanoparticles for Magnetic Targeting of Stem Cells. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37145890 DOI: 10.1021/acsami.2c20265] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Stem cell therapy represents one of the most promising approaches for tissue repair and regeneration. However, the full potential of stem cell therapy remains to be realized. One major challenge is the insufficient homing and retention of stem cells at the desired sites after in vivo delivery. Here, we provide a proof-of-principle demonstration of magnetic targeting and retention of human muscle-derived stem cells (hMDSCs) in vitro through magnetic force-mediated internalization of magnetic iron oxide nanoparticles (MIONs) and the use of a micropatterned magnet. We found that the magnetic force-mediated cellular uptake of MIONs occurs through an endocytic pathway, and the MIONs were exclusively localized in the lysosomes. The intracellular MIONs had no detrimental effect on the proliferation of hMDSCs or their multilineage differentiation, and no MIONs were translocated to other cells in a coculture system. Using hMDSCs and three other cell types including human umbilical vein endothelial cells (HUVECs), human dermal fibroblasts (HDFs), and HeLa cells, we further discovered that the magnetic force-mediated MION uptake increased with MION size and decreased with cell membrane tension. We found that the cellular uptake rate was initially increased with MION concentration in solution and approached saturation. These findings provide important insight and guidance for magnetic targeting of stem cells in therapeutic applications.
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Affiliation(s)
- Linlin Zhang
- Department of Bioengineering, Rice University, Houston, Texas 77030, United States
| | - Samira Hajebrahimi
- Department of Bioengineering, Rice University, Houston, Texas 77030, United States
| | - Sheng Tong
- Department of Bioengineering, Rice University, Houston, Texas 77030, United States
| | - Xueqin Gao
- Department of Orthopedic Surgery, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas 77030, United States
- Linda and Mitch Hart Center for Regenerative and Personalized Medicine, Steadman Philippon Research Institute, Vail, Colorado 81657, United States
| | - Haizi Cheng
- Department of Orthopedic Surgery, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas 77030, United States
| | - Qingbo Zhang
- Department of Bioengineering, Rice University, Houston, Texas 77030, United States
| | - Daniel T Hinojosa
- Department of Bioengineering, Rice University, Houston, Texas 77030, United States
| | - Kaiyi Jiang
- Department of Bioengineering, Rice University, Houston, Texas 77030, United States
| | - Lin Hong
- Department of Bioengineering, Rice University, Houston, Texas 77030, United States
| | - Johnny Huard
- Department of Orthopedic Surgery, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas 77030, United States
- Linda and Mitch Hart Center for Regenerative and Personalized Medicine, Steadman Philippon Research Institute, Vail, Colorado 81657, United States
| | - Gang Bao
- Department of Bioengineering, Rice University, Houston, Texas 77030, United States
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12
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Kasse CM, Yu AC, Powell AE, Roth GA, Liong CS, Jons CK, Buahin A, Maikawa CL, Zhou X, Youssef S, Glanville JE, Appel EA. Subcutaneous delivery of an antibody against SARS-CoV-2 from a supramolecular hydrogel depot. Biomater Sci 2023; 11:2065-2079. [PMID: 36723072 PMCID: PMC10012178 DOI: 10.1039/d2bm00819j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Prolonged maintenance of therapeutically-relevant levels of broadly neutralizing antibodies (bnAbs) is necessary to enable passive immunization against infectious disease. Unfortunately, protection only lasts for as long as these bnAbs remain present at a sufficiently high concentration in the body. Poor pharmacokinetics and burdensome administration are two challenges that need to be addressed in order to make pre- and post-exposure prophylaxis with bnAbs feasible and effective. In this work, we develop a supramolecular hydrogel as an injectable, subcutaneous depot to encapsulate and deliver antibody drug cargo. This polymer-nanoparticle (PNP) hydrogel exhibits shear-thinning and self-healing properties that are required for an injectable drug delivery vehicle. In vitro drug release assays and diffusion measurements indicate that the PNP hydrogels prevent burst release and slow the release of encapsulated antibodies. Delivery of bnAbs against SARS-CoV-2 from PNP hydrogels is compared to standard routes of administration in a preclinical mouse model. We develop a multi-compartment model to understand the ability of these subcutaneous depot materials to modulate the pharmacokinetics of released antibodies; the model is extrapolated to explore the requirements needed for novel materials to successfully deliver relevant antibody therapeutics with different pharmacokinetic characteristics.
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Affiliation(s)
- Catherine M Kasse
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA.
| | - Anthony C Yu
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA.
| | - Abigail E Powell
- Department of Biochemistry, Stanford University School of Medicine, Stanford, CA 94305, USA.,Stanford ChEM-H, Stanford University, Stanford, CA 94305, USA
| | - Gillie A Roth
- Department of Bioengineering, Stanford University, Stanford, CA, 94305 USA
| | - Celine S Liong
- Department of Bioengineering, Stanford University, Stanford, CA, 94305 USA
| | - Carolyn K Jons
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA.
| | - Awua Buahin
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA.
| | - Caitlin L Maikawa
- Department of Bioengineering, Stanford University, Stanford, CA, 94305 USA
| | - Xueting Zhou
- Department of Bioengineering, Stanford University, Stanford, CA, 94305 USA
| | - Sawsan Youssef
- Centivax Inc., 329 Oyster Point Drive, 3rd Floor South San Francisco, CA 94080, USA
| | - Jacob E Glanville
- Centivax Inc., 329 Oyster Point Drive, 3rd Floor South San Francisco, CA 94080, USA
| | - Eric A Appel
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA. .,Stanford ChEM-H, Stanford University, Stanford, CA 94305, USA.,Department of Bioengineering, Stanford University, Stanford, CA, 94305 USA.,Institute for Immunity, Transplantation, & Infection, Stanford University School of Medicine, Stanford, CA 94305, USA.,Department of Pediatrics - Endocrinology, Stanford University School of Medicine, Stanford, CA 94305, USA.,Stanford Woods Institute for the Environment, Stanford University, Stanford, CA 94305, USA
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13
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Nichifor M. Role of Hydrophobic Associations in Self-Healing Hydrogels Based on Amphiphilic Polysaccharides. Polymers (Basel) 2023; 15:polym15051065. [PMID: 36904306 PMCID: PMC10005649 DOI: 10.3390/polym15051065] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 02/17/2023] [Accepted: 02/19/2023] [Indexed: 02/24/2023] Open
Abstract
Self-healing hydrogels have the ability to recover their original properties after the action of an external stress, due to presence in their structure of reversible chemical or physical cross-links. The physical cross-links lead to supramolecular hydrogels stabilized by hydrogen bonds, hydrophobic associations, electrostatic interactions, or host-guest interactions. Hydrophobic associations of amphiphilic polymers can provide self-healing hydrogels with good mechanical properties, and can also add more functionalities to these hydrogels by creating hydrophobic microdomains inside the hydrogels. This review highlights the main general advantages brought by hydrophobic associations in the design of self-healing hydrogels, with a focus on hydrogels based on biocompatible and biodegradable amphiphilic polysaccharides.
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Affiliation(s)
- Marieta Nichifor
- Department of Natural Polymers, Bioactive and Biocompatible Materials, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41A, 700487 Iasi, Romania
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14
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Vuille-Dit-Bille E, Deshmukh DV, Connolly S, Heub S, Boder-Pasche S, Dual J, Tibbitt MW, Weder G. Tools for manipulation and positioning of microtissues. LAB ON A CHIP 2022; 22:4043-4066. [PMID: 36196619 DOI: 10.1039/d2lc00559j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Complex three-dimensional (3D) in vitro models are emerging as a key technology to support research areas in personalised medicine, such as drug development and regenerative medicine. Tools for manipulation and positioning of microtissues play a crucial role in the microtissue life cycle from production to end-point analysis. The ability to precisely locate microtissues can improve the efficiency and reliability of processes and investigations by reducing experimental time and by providing more controlled parameters. To achieve this goal, standardisation of the techniques is of primary importance. Compared to microtissue production, the field of microtissue manipulation and positioning is still in its infancy but is gaining increasing attention in the last few years. Techniques to position microtissues have been classified into four main categories: hydrodynamic techniques, bioprinting, substrate modification, and non-contact active forces. In this paper, we provide a comprehensive review of the different tools for the manipulation and positioning of microtissues that have been reported to date. The working mechanism of each technique is described, and its merits and limitations are discussed. We conclude by evaluating the potential of the different approaches to support progress in personalised medicine.
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Affiliation(s)
- Emilie Vuille-Dit-Bille
- Centre Suisse d'Electronique et de Microtechnique SA, Neuchâtel, Switzerland.
- MicroBioRobotic Systems Laboratory, Institute of Mechanical Engineering, EPFL, Lausanne, Switzerland
| | - Dhananjay V Deshmukh
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
- Institute for Mechanical Systems, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Sinéad Connolly
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich, Zurich, Switzerland
| | - Sarah Heub
- Centre Suisse d'Electronique et de Microtechnique SA, Neuchâtel, Switzerland.
| | | | - Jürg Dual
- Institute for Mechanical Systems, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Mark W Tibbitt
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Gilles Weder
- Centre Suisse d'Electronique et de Microtechnique SA, Neuchâtel, Switzerland.
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15
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Correa S, Meany EL, Gale EC, Klich JH, Saouaf OM, Mayer AT, Xiao Z, Liong CS, Brown RA, Maikawa CL, Grosskopf AK, Mann JL, Idoyaga J, Appel EA. Injectable Nanoparticle-Based Hydrogels Enable the Safe and Effective Deployment of Immunostimulatory CD40 Agonist Antibodies. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2103677. [PMID: 35975424 PMCID: PMC9534946 DOI: 10.1002/advs.202103677] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 06/27/2022] [Indexed: 05/31/2023]
Abstract
When properly deployed, the immune system can eliminate deadly pathogens, eradicate metastatic cancers, and provide long-lasting protection from diverse diseases. Unfortunately, realizing these remarkable capabilities is inherently risky as disruption to immune homeostasis can elicit dangerous complications or autoimmune disorders. While current research is continuously expanding the arsenal of potent immunotherapeutics, there is a technological gap when it comes to controlling when, where, and how long these drugs act on the body. Here, this study explored the ability of a slow-releasing injectable hydrogel depot to reduce dose-limiting toxicities of immunostimulatory CD40 agonist (CD40a) while maintaining its potent anticancer efficacy. A previously described polymer-nanoparticle (PNP) hydrogel system is leveraged that exhibits shear-thinning and yield-stress properties that are hypothesized to improve locoregional delivery of CD40a immunotherapy. Using positron emission tomography, it is demonstrated that prolonged hydrogel-based delivery redistributes CD40a exposure to the tumor and the tumor draining lymph node (TdLN), thereby reducing weight loss, hepatotoxicity, and cytokine storm associated with standard treatment. Moreover, CD40a-loaded hydrogels mediate improved local cytokine induction in the TdLN and improve treatment efficacy in the B16F10 melanoma model. PNP hydrogels, therefore, represent a facile, drug-agnostic method to ameliorate immune-related adverse effects and explore locoregional delivery of immunostimulatory drugs.
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Affiliation(s)
- Santiago Correa
- Department of Materials Science and EngineeringStanford UniversityStanfordCA94305USA
| | - Emily L. Meany
- Department of BioengineeringStanford UniversityStanfordCA94305USA
| | - Emily C. Gale
- Department of BiochemistryStanford University School of MedicineStanfordCA94305USA
| | - John H. Klich
- Department of BioengineeringStanford UniversityStanfordCA94305USA
| | - Olivia M. Saouaf
- Department of Materials Science and EngineeringStanford UniversityStanfordCA94305USA
| | - Aaron T. Mayer
- Department of BioengineeringStanford UniversityStanfordCA94305USA
| | - Zunyu Xiao
- Department of BioengineeringStanford UniversityStanfordCA94305USA
| | - Celine S. Liong
- Department of BioengineeringStanford UniversityStanfordCA94305USA
| | - Ryanne A. Brown
- Department of PathologyStanford University School of MedicineStanfordCA94305USA
| | | | | | - Joseph L. Mann
- Department of Materials Science and EngineeringStanford UniversityStanfordCA94305USA
| | - Juliana Idoyaga
- Department of Microbiology & ImmunologyStanford University School of MedicineStanfordCA94305USA
- Stanford ChEM‐H InstituteStanford University School of MedicineStanfordCA94305USA
- Stanford Cancer InstituteStanford University School of MedicineStanfordCA94305USA
| | - Eric A. Appel
- Department of Materials Science and EngineeringStanford UniversityStanfordCA94305USA
- Stanford ChEM‐H InstituteStanford University School of MedicineStanfordCA94305USA
- Stanford Cancer InstituteStanford University School of MedicineStanfordCA94305USA
- Department of Pediatrics – EndocrinologyStanford University School of MedicineStanfordCA94305USA
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16
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Grosskopf AK, Mann JL, Baillet J, Lopez Hernandez H, Autzen AAA, Yu AC, Appel EA. Extreme Extensibility in Physically Cross-Linked Nanocomposite Hydrogels Leveraging Dynamic Polymer–Nanoparticle Interactions. Macromolecules 2022; 55:7498-7511. [PMID: 36118599 PMCID: PMC9476865 DOI: 10.1021/acs.macromol.2c00649] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 08/02/2022] [Indexed: 11/28/2022]
Abstract
![]()
Designing yield stress fluids to exhibit desired functional
properties
is an integral challenge in many applications such as 3D printing,
drilling, food formulation, fiber spinning, adhesives, and injectable
biomaterials. Extensibility in particular has been found to be a highly
beneficial characteristic for materials in these applications; however,
few highly extensible, high water content materials have been reported
to date. Herein we engineer a class of high water content nanocomposite
hydrogel materials leveraging multivalent, noncovalent, polymer–nanoparticle
(PNP) interactions between modified cellulose polymers and biodegradable
nanoparticles. We show that modulation of the chemical composition
of the PNP hydrogels controls the dynamic cross-linking interactions
within the polymer network and directly impacts yielding and viscoelastic
responses. These materials can be engineered to stretch up to 2000%
strain and occupy an unprecedented property regime for extensible
yield stress fluids. Moreover, a dimensional analysis of the relationships
between extensibility and the relaxation and recovery time scales
of these nanocomposite hydrogels uncovers generalizable design criteria
that will be critical for future development of extensible materials.
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Affiliation(s)
- Abigail K. Grosskopf
- Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Joseph L. Mann
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Julie Baillet
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
- CNRS, Bordeaux INP, LCPO, University of Bordeaux, Pessac 33600, France
| | - Hector Lopez Hernandez
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Anton A. A. Autzen
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
- Department of Health Technology, Technical University of Denmark, 2800 Lyngby, Denmark
| | - Anthony C. Yu
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
| | - Eric A. Appel
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
- Department of Bioengineering, Stanford University, Stanford, California 94305, United States
- Department of Pediatrics- Endocrinology, Stanford University, Stanford, California 94305, United States
- ChEM-H Institute, Stanford University, Stanford, California 94305, United States
- Woods Institute for the Environment, Stanford University, Stanford, California 94305, United States
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17
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Tohidi H, Maleki-Jirsaraei N, Simchi A, Mohandes F, Emami Z, Fassina L, Naro F, Conti B, Barbagallo F. An Electroconductive, Thermosensitive, and Injectable Chitosan/Pluronic/Gold-Decorated Cellulose Nanofiber Hydrogel as an Efficient Carrier for Regeneration of Cardiac Tissue. MATERIALS 2022; 15:ma15155122. [PMID: 35897556 PMCID: PMC9330822 DOI: 10.3390/ma15155122] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 07/14/2022] [Accepted: 07/20/2022] [Indexed: 12/10/2022]
Abstract
Myocardial infarction is a major cause of death worldwide and remains a social and healthcare burden. Injectable hydrogels with the ability to locally deliver drugs or cells to the damaged area can revolutionize the treatment of heart diseases. Herein, we formulate a thermo-responsive and injectable hydrogel based on conjugated chitosan/poloxamers for cardiac repair. To tailor the mechanical properties and electrical signal transmission, gold nanoparticles (AuNPs) with an average diameter of 50 nm were physically bonded to oxidized bacterial nanocellulose fibers (OBC) and added to the thermosensitive hydrogel at the ratio of 1% w/v. The prepared hydrogels have a porous structure with open pore channels in the range of 50−200 µm. Shear rate sweep measurements demonstrate a reversible phase transition from sol to gel with increasing temperature and a gelation time of 5 min. The hydrogels show a shear-thinning behavior with a shear modulus ranging from 1 to 12 kPa dependent on gold concentration. Electrical conductivity studies reveal that the conductance of the polymer matrix is 6 × 10−2 S/m at 75 mM Au. In vitro cytocompatibility assays by H9C2 cells show high biocompatibility (cell viability of >90% after 72 h incubation) with good cell adhesion. In conclusion, the developed nanocomposite hydrogel has great potential for use as an injectable biomaterial for cardiac tissue regeneration.
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Affiliation(s)
- Hajar Tohidi
- Department of Physics and Chemistry, Alzahra University, Vanak Village Street, Tehran 19938 93973, Iran;
| | - Nahid Maleki-Jirsaraei
- Department of Physics and Chemistry, Alzahra University, Vanak Village Street, Tehran 19938 93973, Iran;
- Correspondence: (N.M.-J.); (A.S.)
| | - Abdolreza Simchi
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, Tehran 14588 89694, Iran; (F.M.); (Z.E.)
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Azadi Avenue, Tehran 14588 89694, Iran
- Correspondence: (N.M.-J.); (A.S.)
| | - Fatemeh Mohandes
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, Tehran 14588 89694, Iran; (F.M.); (Z.E.)
| | - Zahra Emami
- Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, Tehran 14588 89694, Iran; (F.M.); (Z.E.)
| | - Lorenzo Fassina
- Department of Electrical, Computer and Biomedical Engineering, University of Pavia, 27100 Pavia, Italy;
| | - Fabio Naro
- Department of Anatomical, Histological, Forensic and Orthopedic Sciences, Sapienza University, 00185 Rome, Italy;
| | - Bice Conti
- Department of Drug Sciences, University of Pavia, 27100 Pavia, Italy;
| | - Federica Barbagallo
- Department of Experimental Medicine, Sapienza University, 00185 Rome, Italy; or
- Faculty of Medicine and Surgery, Kore University of Enna, 94100 Enna, Italy
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18
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19
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Chen BZ, Zhao ZQ, Shahbazi MA, Guo XD. Microneedle-based technology for cell therapy: current status and future directions. NANOSCALE HORIZONS 2022; 7:715-728. [PMID: 35674378 DOI: 10.1039/d2nh00188h] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
With the growing technological innovations in medical treatments, cell-based therapies hold great potential as efficient tools against various previously incurable diseases by restoring or altering the function of certain sets of cells. Along this line, an essential factor to determine the success of cell therapy is the choice of cell delivery strategy. In recent years, a novel trend is blooming in the application of microneedle systems, which are based on the miniaturization of multiple needles within a patch to the micrometer dimensions, aimed at the delivery of therapeutic cells to the target site with high efficiency and in a minimally invasive manner. This review aims to demonstrate the advantages of exploiting microneedle-based technology as a new tool for cell therapy. The advancements of microneedle-based strategies for cell delivery are summarized in terms of two categories: cell-free and cell-loaded microneedle systems. The majority of research on microneedle-based cell therapy has shown promising results for tissue regeneration, cancer immunotherapy, skin immune monitoring and targeted cell delivery. Finally, current challenges and future perspectives toward the development and application of microneedles for cell therapy are also discussed.
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Affiliation(s)
- Bo Zhi Chen
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 10029, China.
- Beijing Laboratory of Biomedical Materials, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Ze Qiang Zhao
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 10029, China.
- Beijing Laboratory of Biomedical Materials, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Mohammad-Ali Shahbazi
- Department of Biomedical Engineering, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands.
- Department of Pharmaceutical Nanotechnology, School of Pharmacy, Zanjan University of Medical Sciences, 45139-56184 Zanjan, Iran
| | - Xin Dong Guo
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 10029, China.
- Beijing Laboratory of Biomedical Materials, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
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20
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Emerging Polymer Materials in Trackable Endovascular Embolization and Cell Delivery: From Hype to Hope. Biomimetics (Basel) 2022; 7:biomimetics7020077. [PMID: 35735593 PMCID: PMC9221114 DOI: 10.3390/biomimetics7020077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 06/05/2022] [Accepted: 06/08/2022] [Indexed: 02/01/2023] Open
Abstract
Minimally invasive endovascular embolization is a widely used clinical technique used for the occlusion of blood vessels to treat various diseases. Different occlusive agents ranging from gelatin foam to synthetic polymers such as poly(vinyl alcohol) (PVA) have been commercially used for embolization. However, these agents have some drawbacks, such as undesired toxicity and unintended and uncontrolled occlusion. To overcome these issues, several polymer-based embolic systems are under investigation including biocompatible and biodegradable microspheres, gelling liquid embolic with controlled occlusive features, and trackable microspheres with enhanced safety profiles. This review aims to summarize recent advances in current and emerging polymeric materials as embolization agents with varying material architectures. Furthermore, this review also explores the potential of combining injectable embolic agents and cell therapy to achieve more effective embolization with the promise of outstanding results in treating various devastating diseases. Finally, limitations and challenges in developing next-generation multifunctional embolic agents are discussed to promote advancement in this emerging field.
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21
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Correa S, Grosskopf AK, Klich JH, Hernandez HL, Appel EA. Injectable Liposome-based Supramolecular Hydrogels for the Programmable Release of Multiple Protein Drugs. MATTER 2022; 5:1816-1838. [PMID: 35800848 PMCID: PMC9255852 DOI: 10.1016/j.matt.2022.03.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Directing biological functions is at the heart of next-generation biomedical initiatives in tissue and immuno-engineering. However, the ambitious goal of engineering complex biological networks requires the ability to precisely perturb specific signaling pathways at distinct times and places. Using lipid nanotechnology and the principles of supramolecular self-assembly, we developed an injectable liposomal nanocomposite hydrogel platform to precisely control the release of multiple protein drugs. By integrating modular lipid nanotechnology into a hydrogel, we introduced multiple mechanisms of release based on liposome surface chemistry. To validate the utility of this system for multi-protein delivery, we demonstrated synchronized, sustained, and localized release of IgG antibody and IL-12 cytokine in vivo, despite the significant size differences between these two proteins. Overall, liposomal hydrogels are a highly modular platform technology with the ability the mediate orthogonal modes of protein release and the potential to precisely coordinate biological cues both in vitro and in vivo.
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Affiliation(s)
- Santiago Correa
- Department of Materials Science & Engineering, Stanford University, Stanford, CA 94305, USA
- These authors contributed equally
| | - Abigail K. Grosskopf
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
- These authors contributed equally
| | - John H. Klich
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA
| | - Hector Lopez Hernandez
- Department of Materials Science & Engineering, Stanford University, Stanford, CA 94305, USA
| | - Eric A. Appel
- Department of Materials Science & Engineering, Stanford University, Stanford, CA 94305, USA
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA
- ChEM-H Institute, Stanford University, Stanford, CA 94305, USA
- Department of Pediatrics – Endocrinology, Stanford University School of Medicine, Stanford, CA 94305, USA
- Woods Institute for the Environment, Stanford University, Stanford, CA 94305, USA
- Lead contact
- To whom correspondence should be addressed;
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22
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Kasse CM, Yu AC, Powell AE, Roth GA, Liong CS, Jons CK, Buahin A, Maikawa CL, Youssef S, Glanville JE, Appel EA. Subcutaneous delivery of an antibody against SARS-CoV-2 from a supramolecular hydrogel depot. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2022:2022.05.24.493347. [PMID: 35665002 PMCID: PMC9164446 DOI: 10.1101/2022.05.24.493347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Prolonged maintenance of therapeutically-relevant levels of broadly neutralizing antibodies (bnAbs) is necessary to enable passive immunization against infectious disease. Unfortunately, protection only lasts for as long as these bnAbs remain present at a sufficiently high concentration in the body. Poor pharmacokinetics and burdensome administration are two challenges that need to be addressed in order to make pre- and post-exposure prophylaxis with bnAbs feasible and effective. In this work, we develop a supramolecular hydrogel as an injectable, subcutaneous depot to encapsulate and deliver antibody drug cargo. This polymer-nanoparticle (PNP) hydrogel exhibits shear-thinning and self-healing properties that are required for an injectable drug delivery vehicle. In vitro drug release assays and diffusion measurements indicate that the PNP hydrogels prevent burst release and slow the release of encapsulated antibodies. Delivery of bnAbs against SARS-CoV-2 from PNP hydrogels is compared to standard routes of administration in a preclinical mouse model. We develop a multi-compartment model to understand the ability of these subcutaneous depot materials to modulate the pharmacokinetics of released antibodies; the model is extrapolated to explore the requirements needed for novel materials to successfully deliver relevant antibody therapeutics with different pharmacokinetic characteristics.
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23
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Zhao J, Peng YY, Wang J, Diaz-Dussan D, Tian W, Duan W, Kong L, Hao X, Narain R. Temperature-Responsive Aldehyde Hydrogels with Injectable, Self-Healing, and Tunable Mechanical Properties. Biomacromolecules 2022; 23:2552-2561. [PMID: 35608162 DOI: 10.1021/acs.biomac.2c00260] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Injectable and self-healing hydrogels with exemplary biocompatibility and tunable mechanical properties are urgently needed due to their significant advantages for tissue engineering applications. Here, we report a new temperature-responsive aldehyde hydrogel with dual physical-cross-linked networks and injectable and self-healing properties prepared from an ABA-type triblock copolymer, poly{[FPMA(4-formylphenyl methacrylate)-co-DEGMA[di(ethylene glycol) methyl ether methacrylate]-b-MPC(2-methacryloyloxyethyl phosphorylcholine)-b-(FPMA-co-DEGMA)}. The thermoresponsive poly(DEGMA) segments drive the dehydration and hydrophobic interaction, enabling polymer chain winding as the first cross-linking network, when the temperature is raised above the critical gelation temperature. Meanwhile, the benzaldehyde groups offer physical interactions, including hydrogen bonding and hydrophobic and π-π stacking interactions as the second cross-linking network. When increasing the benzaldehyde content in the triblock copolymers from 0 to 8.2 mol %, the critical gelation temperature of the resulted hydrogels dropped from 35.5 to 19.9 °C and the mechanical modulus increased from 21 to 1411 Pa. Owing to the physical-cross-linked networks, the hydrogel demonstrated excellent injectability and self-healing properties. The cell viabilities tested from MTT assays toward both normal lung fibroblast cells (MRC-5) and cancerous cervical (HeLa) cells were found to be 100 and 101%, respectively, for varying polymer concentrations up to 1 mg/mL. The 3D cell encapsulation of the hydrogels was evaluated by a cytotoxicity Live/Dead assay, showing 92% cell viability. With these attractive physiochemical and biological properties, this temperature-responsive aldehyde hydrogel can be a promising candidate as a cell scaffold for tissue engineering.
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Affiliation(s)
- Jianyang Zhao
- Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria 3216, Australia.,Manufacturing, CSIRO, Research Way, Clayton, Victoria 3168, Australia.,School of Biomedical Sciences and Engineering, Guangzhou International Campus, South China University of Technology, Guangzhou 511442, China
| | - Yi-Yang Peng
- Department of Chemical and Materials Engineering, University of Alberta, 116 Street and 85th Avenue, Edmonton, Alberta T6G 2G6, Canada
| | - Jinquan Wang
- Guangdong Province Key Laboratory of Biotechnology Drug Candidates, Guangdong Pharmaceutical University, Guangzhou 510006, China
| | - Diana Diaz-Dussan
- Department of Chemical and Materials Engineering, University of Alberta, 116 Street and 85th Avenue, Edmonton, Alberta T6G 2G6, Canada
| | - Wendy Tian
- Manufacturing, CSIRO, Research Way, Clayton, Victoria 3168, Australia
| | - Wei Duan
- School of Medicine, Deakin University, Waurn Ponds, Victoria 3216, Australia
| | - Lingxue Kong
- Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria 3216, Australia
| | - Xiaojuan Hao
- Manufacturing, CSIRO, Research Way, Clayton, Victoria 3168, Australia
| | - Ravin Narain
- Department of Chemical and Materials Engineering, University of Alberta, 116 Street and 85th Avenue, Edmonton, Alberta T6G 2G6, Canada
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24
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Grosskopf AK, Labanieh L, Klysz DD, Roth GA, Xu P, Adebowale O, Gale EC, Jons CK, Klich JH, Yan J, Maikawa CL, Correa S, Ou BS, d’Aquino AI, Cochran JR, Chaudhuri O, Mackall CL, Appel EA. Delivery of CAR-T cells in a transient injectable stimulatory hydrogel niche improves treatment of solid tumors. SCIENCE ADVANCES 2022; 8:eabn8264. [PMID: 35394838 PMCID: PMC8993118 DOI: 10.1126/sciadv.abn8264] [Citation(s) in RCA: 82] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 02/19/2022] [Indexed: 05/21/2023]
Abstract
Adoptive cell therapy (ACT) has proven to be highly effective in treating blood cancers, but traditional approaches to ACT are poorly effective in treating solid tumors observed clinically. Novel delivery methods for therapeutic cells have shown promise for treatment of solid tumors when compared with standard intravenous administration methods, but the few reported approaches leverage biomaterials that are complex to manufacture and have primarily demonstrated applicability following tumor resection or in immune-privileged tissues. Here, we engineer simple-to-implement injectable hydrogels for the controlled co-delivery of CAR-T cells and stimulatory cytokines that improve treatment of solid tumors. The unique architecture of this material simultaneously inhibits passive diffusion of entrapped cytokines and permits active motility of entrapped cells to enable long-term retention, viability, and activation of CAR-T cells. The generation of a transient inflammatory niche following administration affords sustained exposure of CAR-T cells, induces a tumor-reactive CAR-T phenotype, and improves efficacy of treatment.
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Affiliation(s)
- Abigail K. Grosskopf
- Department of Chemical Engineering, Stanford
University, Stanford, CA 94305, USA
| | - Louai Labanieh
- Department of Bioengineering, Stanford University,
Stanford, CA 94305, USA
| | - Dorota D. Klysz
- Center for Cancer Cell Therapy, Stanford Cancer
Institute, Stanford University School of Medicine, Stanford, CA 94305,
USA
| | - Gillie A. Roth
- Department of Bioengineering, Stanford University,
Stanford, CA 94305, USA
| | - Peng Xu
- Center for Cancer Cell Therapy, Stanford Cancer
Institute, Stanford University School of Medicine, Stanford, CA 94305,
USA
| | - Omokolade Adebowale
- Department of Chemical Engineering, Stanford
University, Stanford, CA 94305, USA
| | - Emily C. Gale
- Department of Biochemistry, Stanford University,
Stanford, CA 94305, USA
| | - Carolyn K. Jons
- Department of Materials Science and Engineering,
Stanford University, Stanford, CA 94305, USA
| | - John H. Klich
- Department of Bioengineering, Stanford University,
Stanford, CA 94305, USA
| | - Jerry Yan
- Department of Bioengineering, Stanford University,
Stanford, CA 94305, USA
| | - Caitlin L. Maikawa
- Department of Bioengineering, Stanford University,
Stanford, CA 94305, USA
| | - Santiago Correa
- Department of Materials Science and Engineering,
Stanford University, Stanford, CA 94305, USA
| | - Ben S. Ou
- Department of Bioengineering, Stanford University,
Stanford, CA 94305, USA
| | - Andrea I. d’Aquino
- Department of Materials Science and Engineering,
Stanford University, Stanford, CA 94305, USA
| | - Jennifer R. Cochran
- Department of Chemical Engineering, Stanford
University, Stanford, CA 94305, USA
- Department of Bioengineering, Stanford University,
Stanford, CA 94305, USA
| | - Ovijit Chaudhuri
- Department of Mechanical Engineering, Stanford
University, Stanford, CA 94305, USA
| | - Crystal L. Mackall
- Center for Cancer Cell Therapy, Stanford Cancer
Institute, Stanford University School of Medicine, Stanford, CA 94305,
USA
- Department of Pediatrics, Stanford University School
of Medicine, Stanford, CA 94305, USA
- Stanford Cancer Institute, Stanford University School
of Medicine, Stanford, CA 94305, USA
- Department of Medicine, Stanford University School of
Medicine, Stanford, CA 94305, USA
| | - Eric A. Appel
- Department of Bioengineering, Stanford University,
Stanford, CA 94305, USA
- Department of Materials Science and Engineering,
Stanford University, Stanford, CA 94305, USA
- Department of Pediatrics, Stanford University School
of Medicine, Stanford, CA 94305, USA
- Stanford Cancer Institute, Stanford University School
of Medicine, Stanford, CA 94305, USA
- ChEM-H Institute, Stanford University, Stanford, CA
94305, USA
- Woods Institute for the Environment, Stanford
University, Stanford, CA 94305, USA
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25
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Shafiq M, Ali O, Han SB, Kim DH. Mechanobiological Strategies to Enhance Stem Cell Functionality for Regenerative Medicine and Tissue Engineering. Front Cell Dev Biol 2021; 9:747398. [PMID: 34926444 PMCID: PMC8678455 DOI: 10.3389/fcell.2021.747398] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 11/10/2021] [Indexed: 12/18/2022] Open
Abstract
Stem cells have been extensively used in regenerative medicine and tissue engineering; however, they often lose their functionality because of the inflammatory microenvironment. This leads to their poor survival, retention, and engraftment at transplantation sites. Considering the rapid loss of transplanted cells due to poor cell-cell and cell-extracellular matrix (ECM) interactions during transplantation, it has been reasoned that stem cells mainly mediate reparative responses via paracrine mechanisms, including the secretion of extracellular vesicles (EVs). Ameliorating poor cell-cell and cell-ECM interactions may obviate the limitations associated with the poor retention and engraftment of transplanted cells and enable them to mediate tissue repair through the sustained and localized presentation of secreted bioactive cues. Biomaterial-mediated strategies may be leveraged to confer stem cells enhanced immunomodulatory properties, as well as better engraftment and retention at the target site. In these approaches, biomaterials have been exploited to spatiotemporally present bioactive cues to stem cell-laden platforms (e.g., aggregates, microtissues, and tissue-engineered constructs). An array of biomaterials, such as nanoparticles, hydrogels, and scaffolds, has been exploited to facilitate stem cells function at the target site. Additionally, biomaterials can be harnessed to suppress the inflammatory microenvironment to induce enhanced tissue repair. In this review, we summarize biomaterial-based platforms that impact stem cell function for better tissue repair that may have broader implications for the treatment of various diseases as well as tissue regeneration.
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Affiliation(s)
- Muhammad Shafiq
- Department of Biotechnology, Faculty of Life Sciences, University of Central Punjab, Lahore, Pakistan
| | - Onaza Ali
- School of Chemistry and Chemical Engineering, Tiangong University, Tianjin, China
| | - Seong-Beom Han
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, South Korea
| | - Dong-Hwee Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, South Korea.,Department of Integrative Energy Engineering, College of Engineering, Korea University, Seoul, South Korea
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26
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Bagley RHT, Jones ST. Deoxyribonucleic acid polymer nanoparticle hydrogels. Chem Commun (Camb) 2021; 57:12111-12114. [PMID: 34704568 DOI: 10.1039/d1cc05668a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Polymer nanoparticle hydrogels made of deoxyribonucleic acid and silica have been prepared and shown to display shear thinning and self-healing properties, sustained release of cargo and enzymatic degradation.
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Affiliation(s)
- Robert H T Bagley
- Department of Materials, The University of Manchester, Manchester, M13 9PL, UK. .,The Henry Royce Institute, Manchester, M13 9PL, UK
| | - Samuel T Jones
- Department of Materials, The University of Manchester, Manchester, M13 9PL, UK. .,The Henry Royce Institute, Manchester, M13 9PL, UK
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27
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Grosskopf AK, Saouaf OA, Lopez Hernandez H, Appel EA. Gelation and yielding behavior of
polymer–nanoparticle
hydrogels. JOURNAL OF POLYMER SCIENCE 2021; 59:2854-2866. [PMID: 35875706 PMCID: PMC9298381 DOI: 10.1002/pol.20210652] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 09/22/2021] [Accepted: 09/23/2021] [Indexed: 12/13/2022]
Abstract
Polymer–nanoparticle hydrogels are a unique class of self‐assembled, shear‐thinning, yield‐stress fluids that have demonstrated potential utility in many impactful applications. Here, we present a thorough analysis of the gelation and yielding behavior of these materials with respect to the polymer and nanoparticle component stoichiometry. Through comprehensive rheological and diffusion studies, we reveal insights into the structural dynamics of the polymer nanoparticle network that identify that stoichiometry plays a key role in gelation and yielding, ultimately enabling the development of hydrogel formulations with unique shear‐thinning and yield‐stress behaviors. Access to these materials opens new doors for interesting applications in a variety of fields including tissue engineering, drug delivery, and controlled solution viscosity.
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Affiliation(s)
| | - Olivia A. Saouaf
- Department of Materials Science and Engineering Stanford University Stanford California USA
| | - Hector Lopez Hernandez
- Department of Materials Science and Engineering Stanford University Stanford California USA
| | - Eric A. Appel
- Department of Materials Science and Engineering Stanford University Stanford California USA
- Department of Pediatrics—Endocrinology Stanford University Stanford California USA
- Department of Bioengineering Stanford University Stanford California USA
- ChEM‐H Institute Stanford University Stanford California USA
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28
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Correa S, Grosskopf AK, Lopez Hernandez H, Chan D, Yu AC, Stapleton LM, Appel EA. Translational Applications of Hydrogels. Chem Rev 2021; 121:11385-11457. [PMID: 33938724 PMCID: PMC8461619 DOI: 10.1021/acs.chemrev.0c01177] [Citation(s) in RCA: 346] [Impact Index Per Article: 115.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Indexed: 12/17/2022]
Abstract
Advances in hydrogel technology have unlocked unique and valuable capabilities that are being applied to a diverse set of translational applications. Hydrogels perform functions relevant to a range of biomedical purposes-they can deliver drugs or cells, regenerate hard and soft tissues, adhere to wet tissues, prevent bleeding, provide contrast during imaging, protect tissues or organs during radiotherapy, and improve the biocompatibility of medical implants. These capabilities make hydrogels useful for many distinct and pressing diseases and medical conditions and even for less conventional areas such as environmental engineering. In this review, we cover the major capabilities of hydrogels, with a focus on the novel benefits of injectable hydrogels, and how they relate to translational applications in medicine and the environment. We pay close attention to how the development of contemporary hydrogels requires extensive interdisciplinary collaboration to accomplish highly specific and complex biological tasks that range from cancer immunotherapy to tissue engineering to vaccination. We complement our discussion of preclinical and clinical development of hydrogels with mechanical design considerations needed for scaling injectable hydrogel technologies for clinical application. We anticipate that readers will gain a more complete picture of the expansive possibilities for hydrogels to make practical and impactful differences across numerous fields and biomedical applications.
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Affiliation(s)
- Santiago Correa
- Materials
Science & Engineering, Stanford University, Stanford, California 94305, United States
| | - Abigail K. Grosskopf
- Chemical
Engineering, Stanford University, Stanford, California 94305, United States
| | - Hector Lopez Hernandez
- Materials
Science & Engineering, Stanford University, Stanford, California 94305, United States
| | - Doreen Chan
- Chemistry, Stanford University, Stanford, California 94305, United States
| | - Anthony C. Yu
- Materials
Science & Engineering, Stanford University, Stanford, California 94305, United States
| | | | - Eric A. Appel
- Materials
Science & Engineering, Stanford University, Stanford, California 94305, United States
- Bioengineering, Stanford University, Stanford, California 94305, United States
- Pediatric
Endocrinology, Stanford University School
of Medicine, Stanford, California 94305, United States
- ChEM-H Institute, Stanford
University, Stanford, California 94305, United States
- Woods
Institute for the Environment, Stanford
University, Stanford, California 94305, United States
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29
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Kim S, Nowicki KW, Gross BA, Wagner WR. Injectable hydrogels for vascular embolization and cell delivery: The potential for advances in cerebral aneurysm treatment. Biomaterials 2021; 277:121109. [PMID: 34530233 DOI: 10.1016/j.biomaterials.2021.121109] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 08/23/2021] [Accepted: 08/27/2021] [Indexed: 12/11/2022]
Abstract
Cerebral aneurysms are vascular lesions caused by the biomechanical failure of the vessel wall due to hemodynamic stress and inflammation. Aneurysmal rupture results in subarachnoid hemorrhage often leading to death or disability. Current treatment options include open surgery and minimally invasive endovascular options aimed at secluding the aneurysm from the circulation. Cerebral aneurysm embolization with appropriate materials is a therapeutic approach to prevent rupture and the resultant clinical sequelae. Metallic platinum coils are a typical, practical option to embolize cerebral aneurysms. However, the development of an alternative treatment modality is of interest because of poor occlusion permanence, coil migration, and coil compaction. Moreover, minimizing the implanted foreign materials during therapy is of importance not just to patients, but also to clinicians in the event an open surgical approach has to be pursued in the future. Polymeric injectable hydrogels have been investigated for transcatheter embolization and cell therapy with the potential for permanent aneurysm repair. This review focuses on how the combination of injectable embolic biomaterials and cell therapy may achieve minimally invasive remodeling of a degenerated cerebral artery with promise for superior outcomes in treatment of this devastating disease.
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Affiliation(s)
- Seungil Kim
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA; Department of Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Kamil W Nowicki
- Department of Neurosurgery, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Bradley A Gross
- Department of Neurosurgery, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - William R Wagner
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA; Department of Surgery, University of Pittsburgh, Pittsburgh, PA, USA; Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA; Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA, USA.
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30
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Guzzi EA, Bischof R, Dranseikiene D, Deshmukh DV, Wahlsten A, Bovone G, Bernhard S, Tibbitt MW. Hierarchical biomaterials via photopatterning-enhanced direct ink writing. Biofabrication 2021; 13. [PMID: 34433148 DOI: 10.1088/1758-5090/ac212f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 08/25/2021] [Indexed: 12/16/2022]
Abstract
Recent advances in additive manufacturing (AM) technologies provide tools to fabricate biological structures with complex three-dimensional (3D) organization. Deposition-based approaches have been exploited to manufacture multimaterial constructs. Stimulus-triggered approaches have been used to fabricate scaffolds with high resolution. Both features are useful to produce biomaterials that mimic the hierarchical organization of human tissues. Recently, multitechnology biofabrication approaches have been introduced that integrate benefits from different AM techniques to enable more complex materials design. However, few methods allow for tunable properties at both micro- and macro-scale in materials that are conducive for cell growth. To improve the organization of biofabricated constructs, we integrated direct ink writing (DIW) with digital light processing (DLP) to form multimaterial constructs with improved spatial control over final scaffold mechanics. Polymer-nanoparticle hydrogels were combined with methacryloyl gelatin (GelMA) to engineer dual inks that were compatible with both DIW and DLP. The shear-thinning and self-healing properties of the dual inks enabled extrusion-based 3D printing. The inclusion of GelMA provided a handle for spatiotemporal control of cross-linking with DLP. Exploiting this technique, complex multimaterial constructs were printed with defined mechanical reinforcement. In addition, the multitechnology approach was used to print live cells for biofabrication applications. Overall, the combination of DIW and DLP is a simple and efficient strategy to fabricate hierarchical biomaterials with user-defined control over material properties at both micro- and macro-scale.
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Affiliation(s)
- Elia A Guzzi
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland
| | - Raffaele Bischof
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland
| | - Dalia Dranseikiene
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland
| | - Dhananjay V Deshmukh
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland.,Institute for Mechanical Systems (IMES), Department of Mechanical and Process Engineering, ETH Zurich, Tannenstrasse 3, Zurich 8092, Switzerland
| | - Adam Wahlsten
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland
| | - Giovanni Bovone
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland
| | - Stéphane Bernhard
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland
| | - Mark W Tibbitt
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland
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31
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Sharma AK, Priya, Kaith BS, Bhagya Shree, Simran, Saiyam. Borax mediated synthesis of a biocompatible self-healing hydrogel using dialdehyde carboxymethyl cellulose-dextrin and gelatin. REACT FUNCT POLYM 2021. [DOI: 10.1016/j.reactfunctpolym.2021.104977] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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32
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Grosskopf AK, Correa S, Baillet J, Maikawa CL, Gale EC, Brown RA, Appel EA. Consistent tumorigenesis with self-assembled hydrogels enables high-powered murine cancer studies. Commun Biol 2021; 4:985. [PMID: 34413455 PMCID: PMC8376877 DOI: 10.1038/s42003-021-02500-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 07/21/2021] [Indexed: 01/05/2023] Open
Abstract
Preclinical cancer research is heavily dependent on allograft and xenograft models, but current approaches to tumor inoculation yield inconsistent tumor formation and growth, ultimately wasting valuable resources (e.g., animals, time, and money) and limiting experimental progress. Here we demonstrate a method for tumor inoculation using self-assembled hydrogels to reliably generate tumors with low variance in growth. The observed reduction in model variance enables smaller animal cohorts, improved effect observation and higher powered studies.
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Affiliation(s)
| | - Santiago Correa
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
| | - Julie Baillet
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA
| | - Caitlin L Maikawa
- Department of Bioengineering, Stanford University, Stanford, CA, USA
| | - Emily C Gale
- Department of Biochemistry, Stanford University, Stanford, CA, USA
| | - Ryanne A Brown
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA
| | - Eric A Appel
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
- Department of Bioengineering, Stanford University, Stanford, CA, USA.
- Department of Pediatrics-Endocrinology, Stanford University, Stanford, CA, USA.
- ChEM-H Institute, Stanford University, Stanford, CA, USA.
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33
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Roth G, Saouaf OM, Smith AAA, Gale EC, Hernández MA, Idoyaga J, Appel EA. Prolonged Codelivery of Hemagglutinin and a TLR7/8 Agonist in a Supramolecular Polymer-Nanoparticle Hydrogel Enhances Potency and Breadth of Influenza Vaccination. ACS Biomater Sci Eng 2021; 7:1889-1899. [PMID: 33404236 PMCID: PMC8153386 DOI: 10.1021/acsbiomaterials.0c01496] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 12/23/2020] [Indexed: 12/12/2022]
Abstract
The sustained release of vaccine cargo has been shown to improve humoral immune responses to challenging pathogens such as influenza. Extended codelivery of antigen and adjuvant prolongs germinal center reactions, thus improving antibody affinity maturation and the ability to neutralize the target pathogen. Here, we develop an injectable, physically cross-linked polymer-nanoparticle (PNP) hydrogel system to prolong the local codelivery of hemagglutinin and a toll-like receptor 7/8 agonist (TLR7/8a) adjuvant. By tethering the TLR7/8a to a NP motif within the hydrogels (TLR7/8a-NP), the dynamic mesh of the PNP hydrogels enables codiffusion of the adjuvant and protein antigen (hemagglutinin), therefore enabling sustained codelivery of these two physicochemically distinct molecules. We show that subcutaneous delivery of PNP hydrogels carrying hemagglutinin and TLR7/8a-NP in mice improves the magnitude and duration of antibody titers in response to a single injection vaccination compared to clinically used adjuvants. Furthermore, the PNP gel-based slow delivery of influenza vaccines led to increased breadth of antibody responses against future influenza variants, including a future pandemic variant, compared to clinical adjuvants. In summary, this work introduces a simple and effective vaccine delivery platform that increases the potency and durability of influenza subunit vaccines.
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Affiliation(s)
- Gillie
A. Roth
- Department
of Bioengineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States
| | - Olivia M. Saouaf
- Department
of Materials Science & Engineering, Stanford University, 496 Lomita Mall, Stanford, California 94305, United States
| | - Anton A. A. Smith
- Department
of Materials Science & Engineering, Stanford University, 496 Lomita Mall, Stanford, California 94305, United States
| | - Emily C. Gale
- Department
of Biochemistry, Stanford University School
of Medicine, 279 Campus Drive, Stanford, California 94305, United States
| | - Marcela Alcántara Hernández
- Department
of Microbiology & Immunology, Stanford
University School of Medicine, 299 Campus Drive, Stanford, California 94305, United States
- Program
in Immunology, Stanford University School
of Medicine, 240 Pasteur Drive, Stanford, California 94305, United States
| | - Juliana Idoyaga
- Department
of Microbiology & Immunology, Stanford
University School of Medicine, 299 Campus Drive, Stanford, California 94305, United States
- Program
in Immunology, Stanford University School
of Medicine, 240 Pasteur Drive, Stanford, California 94305, United States
- Institute
for Immunity, Transplantation & Infection, Stanford University School of Medicine, 240 Pasteur Drive, Stanford, California 94305, United States
- ChEM-H
Institute, Stanford University, 290 Jane Stanford Way, Stanford, California 94305, United States
| | - Eric A. Appel
- Department
of Bioengineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States
- Department
of Materials Science & Engineering, Stanford University, 496 Lomita Mall, Stanford, California 94305, United States
- Institute
for Immunity, Transplantation & Infection, Stanford University School of Medicine, 240 Pasteur Drive, Stanford, California 94305, United States
- ChEM-H
Institute, Stanford University, 290 Jane Stanford Way, Stanford, California 94305, United States
- Department
of Pediatrics - Endocrinology, Stanford
University School of Medicine, 300 Pasteur Drive, Stanford, California 94305, United States
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34
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Caldwell AS, Rao VV, Golden AC, Bell DJ, Grim JC, Anseth KS. Mesenchymal stem cell-inspired microgel scaffolds to control macrophage polarization. Bioeng Transl Med 2021; 6:e10217. [PMID: 34027099 PMCID: PMC8126823 DOI: 10.1002/btm2.10217] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 02/25/2021] [Accepted: 03/01/2021] [Indexed: 12/12/2022] Open
Abstract
There is a desire in regenerative medicine to create biofunctional materials that can control and direct cell function in a precise manner. One particular stem cell of interest, human mesenchymal stem cells (hMSCs), can function as regulators of the immunogenic response and aid in tissue regeneration and wound repair. Here, a porous hydrogel scaffold assembled from microgel subunits was used to recapitulate part of this immunomodulatory behavior. The scaffolds were used to culture a macrophage cell line, while cytokines were delivered exogenously to polarize the macrophages to either a pro-inflammatory (M1) or alternatively activated (M2a) phenotypes. Using a cytokine array, interleukin 10 (IL-10) was identified as one key anti-inflammatory factor secreted by hMSCs in pro-inflammatory conditions; it was elevated (125 ± 25 pg/ml) in pro-inflammatory conditions compared to standard medium (6 ± 10 pg/ml). The ability of hMSC laden scaffolds to reverse the M1 phenotype was then examined, even in the presence of exogenous pro-inflammatory cytokines. Co-culture of M1 and M2 macrophages with hMSCs reduced the secretion of TNFα, a pro-inflammatory cytokine even in the presence of pro-inflammatory stimulatory factors. Next, IL-10 was supplemented in the medium or tethered directly to the microgel subunits; both methods limited the secretion of pro-inflammatory cytokines of encapsulated macrophages even in pro-inflammatory conditions. Cumulatively, these results reveal the potential of biofunctional microgel-based scaffolds as acellular therapies to present anti-inflammatory cytokines and control the immunogenic cascade.
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Affiliation(s)
- Alexander S. Caldwell
- Department of Chemical and Biological EngineeringUniversity of ColoradoBoulderColoradoUSA
- BioFrontiers Institute, University of ColoradoBoulderColoradoUSA
| | - Varsha V. Rao
- Department of Chemical and Biological EngineeringUniversity of ColoradoBoulderColoradoUSA
- BioFrontiers Institute, University of ColoradoBoulderColoradoUSA
| | - Alyxandra C. Golden
- Department of Chemical and Biological EngineeringUniversity of ColoradoBoulderColoradoUSA
| | - Daniel J. Bell
- Department of Chemical and Biological EngineeringUniversity of ColoradoBoulderColoradoUSA
- BioFrontiers Institute, University of ColoradoBoulderColoradoUSA
| | - Joseph C. Grim
- Department of Chemical and Biological EngineeringUniversity of ColoradoBoulderColoradoUSA
- BioFrontiers Institute, University of ColoradoBoulderColoradoUSA
| | - Kristi S. Anseth
- Department of Chemical and Biological EngineeringUniversity of ColoradoBoulderColoradoUSA
- BioFrontiers Institute, University of ColoradoBoulderColoradoUSA
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35
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Webber MJ, Pashuck ET. (Macro)molecular self-assembly for hydrogel drug delivery. Adv Drug Deliv Rev 2021; 172:275-295. [PMID: 33450330 PMCID: PMC8107146 DOI: 10.1016/j.addr.2021.01.006] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 12/29/2020] [Accepted: 01/04/2021] [Indexed: 01/15/2023]
Abstract
Hydrogels prepared via self-assembly offer scalable and tunable platforms for drug delivery applications. Molecular-scale self-assembly leverages an interplay of attractive and repulsive forces; drugs and other active molecules can be incorporated into such materials by partitioning in hydrophobic domains, affinity-mediated binding, or covalent integration. Peptides have been widely used as building blocks for self-assembly due to facile synthesis, ease of modification with bioactive molecules, and precise molecular-scale control over material properties through tunable interactions. Additional opportunities are manifest in stimuli-responsive self-assembly for more precise drug action. Hydrogels can likewise be fabricated from macromolecular self-assembly, with both synthetic polymers and biopolymers used to prepare materials with controlled mechanical properties and tunable drug release. These include clinical approaches for solubilization and delivery of hydrophobic drugs. To further enhance mechanical properties of hydrogels prepared through self-assembly, recent work has integrated self-assembly motifs with polymeric networks. For example, double-network hydrogels capture the beneficial properties of both self-assembled and covalent networks. The expanding ability to fabricate complex and precise materials, coupled with an improved understanding of biology, will lead to new classes of hydrogels specifically tailored for drug delivery applications.
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Affiliation(s)
- Matthew J Webber
- University of Notre Dame, Department of Chemical & Biomolecular Engineering, Notre Dame, IN 46556, USA.
| | - E Thomas Pashuck
- Lehigh University, Department of Bioengineering, Bethlehem, PA 18015, USA.
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36
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The biomedical significance of multifunctional nanobiomaterials: The key components for site-specific delivery of therapeutics. Life Sci 2021; 277:119400. [PMID: 33794255 DOI: 10.1016/j.lfs.2021.119400] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 03/08/2021] [Accepted: 03/13/2021] [Indexed: 01/07/2023]
Abstract
The emergence of nanotechnology has provided the possibilities to overcome the potential problems associated with the development of pharmaceuticals including the low solubility, non-specific cellular uptake or action, and rapid clearance. Regarding the biomaterials (BMs), huge efforts have been made for improving their multi-functionalities via incorporation of various nanomaterials (NMs). Nanocomposite hydrogels with suitable properties could exhibit a variety of beneficial effects in biomedicine particularly in the delivery of therapeutics or tissue engineering. NMs including the silica- or carbon-based ones are capable of integration into various BMs that might be due to their special compositions or properties such as the hydrophilicity, hydrophobicity, magnetic or electrical characteristics, and responsiveness to various stimuli. This might provide multi-functional nanobiomaterials against a wide variety of disorders. Meanwhile, inappropriate distribution or penetration into the cells or tissues, bio-nano interface complexity, targeting ability loss, or any other unpredicted phenomena are the serious challenging issues. Computational simulations and models enable development of NMs with optimal characteristics and provide a deeper knowledge of NM interaction with biosystems. This review highlights the biomedical significance of the multifunctional NMs particularly those applied for the development of 2-D or 3-D BMs for a variety of applications including the site-specific delivery of therapeutics. The powerful impacts of the computational techniques on the design process of NMs, quantitation and prediction of protein corona formation, risk assessment, and individualized therapy for improved therapeutic outcomes have also been discussed.
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37
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Cruz-Samperio R, Jordan M, Perriman A. Cell augmentation strategies for cardiac stem cell therapies. Stem Cells Transl Med 2021; 10:855-866. [PMID: 33660953 PMCID: PMC8133336 DOI: 10.1002/sctm.20-0489] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 01/06/2021] [Accepted: 01/12/2021] [Indexed: 12/12/2022] Open
Abstract
Myocardial infarction (MI) has been the primary cause of death in developed countries, resulting in a major psychological and financial burden for society. Current treatments for acute MI are directed toward rapid restoration of perfusion to limit damage to the myocardium, rather than promoting tissue regeneration and subsequent contractile function recovery. Regenerative cell therapies (CTs), in particular those using multipotent stem cells (SCs), are in the spotlight for treatment post‐MI. Unfortunately, the efficacy of CTs is somewhat limited by their poor long‐term viability, homing, and engraftment to the myocardium. In response, a range of novel SC‐based technologies are in development to provide additional cellular modalities, bringing CTs a step closer to the clinic. In this review, the current landscape of emerging CTs and their augmentation strategies for the treatment post‐MI are discussed. In doing so, we highlight recent advances in cell membrane reengineering via genetic modifications, recombinant protein immobilization, and the utilization of soft biomimetic scaffold interfaces.
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Affiliation(s)
| | - Millie Jordan
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, UK
| | - Adam Perriman
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, UK
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38
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Meis CM, Grosskopf AK, Correa S, Appel EA. Injectable Supramolecular Polymer-Nanoparticle Hydrogels for Cell and Drug Delivery Applications. J Vis Exp 2021:10.3791/62234. [PMID: 33616104 PMCID: PMC8104931 DOI: 10.3791/62234] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
These methods describe how to formulate injectable, supramolecular polymer-nanoparticle (PNP) hydrogels for use as biomaterials. PNP hydrogels are composed of two components: hydrophobically modified cellulose as the network polymer and self-assembled core-shell nanoparticles that act as non-covalent cross linkers through dynamic, multivalent interactions. These methods describe both the formation of these self-assembled nanoparticles through nanoprecipitation as well as the formulation and mixing of the two components to form hydrogels with tunable mechanical properties. The use of dynamic light scattering (DLS) and rheology to characterize the quality of the synthesized materials is also detailed. Finally, the utility of these hydrogels for drug delivery, biopharmaceutical stabilization, and cell encapsulation and delivery is demonstrated through in vitro experiments to characterize drug release, thermal stability, and cell settling and viability. Due to its biocompatibility, injectability, and mild gel formation conditions, this hydrogel system is a readily tunable platform suitable for a range of biomedical applications.
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Affiliation(s)
- Catherine M Meis
- Department of Materials Science & Engineering, Stanford University
| | | | - Santiago Correa
- Department of Materials Science & Engineering, Stanford University
| | - Eric A Appel
- Department of Materials Science & Engineering, Stanford University; Department of Bioengineering, Stanford University; Department of Pediatrics - Endocrinology, Stanford University;
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39
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Yu AC, Lian H, Kong X, Lopez Hernandez H, Qin J, Appel EA. Physical networks from entropy-driven non-covalent interactions. Nat Commun 2021; 12:746. [PMID: 33531475 PMCID: PMC7854746 DOI: 10.1038/s41467-021-21024-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 01/08/2021] [Indexed: 12/22/2022] Open
Abstract
Physical networks typically employ enthalpy-dominated crosslinking interactions that become more dynamic at elevated temperatures, leading to network softening. Moreover, standard mathematical frameworks such as time-temperature superposition assume network softening and faster dynamics at elevated temperatures. Yet, deriving a mathematical framework connecting the crosslinking thermodynamics to the temperature-dependent viscoelasticity of physical networks suggests the possibility for entropy-driven crosslinking interactions to provide alternative temperature dependencies. This framework illustrates that temperature negligibly affects crosslink density in reported systems, but drastically influences crosslink dynamics. While the dissociation rate of enthalpy-driven crosslinks is accelerated at elevated temperatures, the dissociation rate of entropy-driven crosslinks is negligibly affected or even slowed under these conditions. Here we report an entropy-driven physical network based on polymer-nanoparticle interactions that exhibits mechanical properties that are invariant with temperature. These studies provide a foundation for designing and characterizing entropy-driven physical crosslinking motifs and demonstrate how these physical networks access thermal properties that are not observed in current physical networks.
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Affiliation(s)
- Anthony C Yu
- Department of Materials Science & Engineering, Stanford University, Stanford, CA, USA
| | - Huada Lian
- Department of Materials Science & Engineering, Stanford University, Stanford, CA, USA
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
| | - Xian Kong
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
| | | | - Jian Qin
- Department of Chemical Engineering, Stanford University, Stanford, CA, USA
| | - Eric A Appel
- Department of Materials Science & Engineering, Stanford University, Stanford, CA, USA.
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40
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Stapleton LM, Lucian HJ, Grosskopf AK, Smith AAA, Totherow KP, Woo YJ, Appel EA. Dynamic Hydrogels for Prevention of Post‐Operative Peritoneal Adhesions. ADVANCED THERAPEUTICS 2021. [DOI: 10.1002/adtp.202000242] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | - Haley J. Lucian
- Department of Cardiothoracic Surgery Stanford University School of Medicine Stanford CA 94305 USA
| | - Abigail K. Grosskopf
- Department of Materials Science and Engineering Stanford University Stanford CA 94305 USA
| | - Anton A. A. Smith
- Department of Materials Science and Engineering Stanford University Stanford CA 94305 USA
| | | | - Y. Joseph Woo
- Department of Bioengineering Stanford University Stanford CA 94305 USA
- Department of Cardiothoracic Surgery Stanford University School of Medicine Stanford CA 94305 USA
| | - Eric A. Appel
- Department of Bioengineering Stanford University Stanford CA 94305 USA
- Department of Materials Science and Engineering Stanford University Stanford CA 94305 USA
- ChEM‐H Institute Stanford University Stanford CA 94305 USA
- Department of Pediatrics (Endocrinology) Stanford University School of Medicine Stanford CA 94305 USA
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41
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Finbloom JA, Demaree B, Abate AR, Desai TA. Networks of High Aspect Ratio Particles to Direct Colloidal Assembly Dynamics and Cellular Interactions. ADVANCED FUNCTIONAL MATERIALS 2020; 30:2005938. [PMID: 33250685 PMCID: PMC7687842 DOI: 10.1002/adfm.202005938] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Indexed: 05/11/2023]
Abstract
Injectable colloids that self-assemble into three-dimensional networks are promising materials for applications in regenerative engineering, as they create open systems for cellular infiltration, interaction, and activation. However, most injectable colloids have spherical morphologies, which lack the high material-biology contact areas afforded by higher aspect ratio materials. To address this need, injectable high aspect ratio particles (HARPs) were developed that form three-dimensional networks to enhance scaffold assembly dynamics and cellular interactions. HARPs were functionalized for tunable surface charge through layer-by-layer electrostatic assembly. Positively charged Chitosan-HARPs had improved particle suspension dynamics when compared to spherical particles or negatively charged HARPs. Chit-HARPs were used to improve the suspension dynamics and viability of MIN6 cells in three-dimensional networks. When combined with negatively charged gelatin microsphere (GelMS) porogens, Chit-HARPs reduced GelMS sedimentation and increased overall network suspension, due to a combination of HARP network formation and electrostatic interactions. Lastly, HARPs were functionalized with fibroblast growth factor 2 (FGF2) to highlight their use for growth factor delivery. FGF2-HARPs increased fibroblast proliferation through a combination of 3D scaffold assembly and growth factor delivery. Taken together, these studies demonstrate the development and diverse uses of high aspect ratio particles as tunable injectable scaffolds for applications in regenerative engineering.
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Affiliation(s)
- Joel A Finbloom
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco. San Francisco, CA 94158
| | - Benjamin Demaree
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco. San Francisco, CA 94158
| | - Adam R Abate
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco. San Francisco, CA 94158
| | - Tejal A Desai
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco. San Francisco, CA 94158
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42
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Meis CM, Salzman EE, Maikawa CL, Smith AAA, Mann JL, Grosskopf AK, Appel EA. Self-Assembled, Dilution-Responsive Hydrogels for Enhanced Thermal Stability of Insulin Biopharmaceuticals. ACS Biomater Sci Eng 2020; 7:4221-4229. [PMID: 34510910 PMCID: PMC8441967 DOI: 10.1021/acsbiomaterials.0c01306] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
![]()
Biotherapeutics currently dominate
the landscape of new drugs because
of their exceptional potency and selectivity. Yet, the intricate molecular
structures that give rise to these beneficial qualities also render
them unstable in formulation. Hydrogels have shown potential as stabilizing
excipients for biotherapeutic drugs, providing protection against
harsh thermal conditions experienced during distribution and storage.
In this work, we report the utilization of a cellulose-based supramolecular
hydrogel formed from polymer–nanoparticle (PNP) interactions
to encapsulate and stabilize insulin, an important biotherapeutic
used widely to treat diabetes. Encapsulation of insulin in these hydrogels
prevents insulin aggregation and maintains insulin bioactivity through
stressed aging conditions of elevated temperature and continuous agitation
for over 28 days. Further, insulin can be easily recovered by dilution
of these hydrogels for administration at the point of care. This supramolecular
hydrogel system shows promise as a stabilizing excipient to reduce
the cold chain dependence of insulin and other biotherapeutics.
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Affiliation(s)
- Catherine M Meis
- Department of Materials Science & Engineering, Stanford University, 496 Lomita Mall, Stanford, California 94305, United States
| | - Erika E Salzman
- Department of Materials Science & Engineering, Stanford University, 496 Lomita Mall, Stanford, California 94305, United States
| | - Caitlin L Maikawa
- Department of Bioengineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States
| | - Anton A A Smith
- Department of Materials Science & Engineering, Stanford University, 496 Lomita Mall, Stanford, California 94305, United States.,Department of Science and Technology, Aarhus University, 8000 Aarhus, Denmark
| | - Joseph L Mann
- Department of Materials Science & Engineering, Stanford University, 496 Lomita Mall, Stanford, California 94305, United States
| | - Abigail K Grosskopf
- Department of Chemical Engineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States
| | - Eric A Appel
- Department of Materials Science & Engineering, Stanford University, 496 Lomita Mall, Stanford, California 94305, United States.,Department of Bioengineering, Stanford University, 443 Via Ortega, Stanford, California 94305, United States.,Department of Pediatrics-Endocrinology, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, California 94305, United States.,ChEM-H Institute, Stanford University, 290 Jane Stanford Way, Stanford, California 94305, United States
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43
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Lopez Hernandez H, Souza JW, Appel EA. A Quantitative Description for Designing the Extrudability of Shear-Thinning Physical Hydrogels. Macromol Biosci 2020; 21:e2000295. [PMID: 33164332 DOI: 10.1002/mabi.202000295] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/19/2020] [Indexed: 12/12/2022]
Abstract
Physically associated hydrogels (PHs) capable of reversible transitions between solid and liquid-like states have enabled novel strategies for 3D printing, therapeutic drug and cell delivery, and regenerative medicine. Among the many design criteria (e.g., viscoelasticity, cargo diffusivity, biocompatibility) for these applications, engineering PHs for extrudability is a necessary and critical design criterion for the successful application of these materials. As the development of many distinct PH material systems continues, a strategy to determine the extrudability of PHs a priori will be exceedingly useful for reducing costly and time-consuming trial-and-error experimentation. Here, a strategy to determine the property-function relationships for PHs in injectable drug delivery applications at clinically relevant flow rates is presented. This strategy-validated with two chemically and physically distinct PHs-reveals material design spaces in the form of Ashby-style plots that highlight acceptable, application-specific material properties. It is shown that the flow behavior of PHs does not obey a single shear-thinning power law and the implications for injectable drug delivery are discussed. This approach for generating design criteria has potential for streamlining the screening of PHs and their utility in applications with varying geometrical (i.e., needle diameter) and process (i.e., flow rate) constraints.
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Affiliation(s)
| | - Jason W Souza
- Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Eric A Appel
- Department of Bioengineering, Stanford University, Stanford, CA, 94305, USA.,ChEM-H Institute, Stanford University, Stanford, CA, 94305, USA
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44
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Roth G, Gale EC, Alcántara-Hernández M, Luo W, Axpe E, Verma R, Yin Q, Yu AC, Lopez Hernandez H, Maikawa CL, Smith AAA, Davis MM, Pulendran B, Idoyaga J, Appel EA. Injectable Hydrogels for Sustained Codelivery of Subunit Vaccines Enhance Humoral Immunity. ACS CENTRAL SCIENCE 2020; 6:1800-1812. [PMID: 33145416 PMCID: PMC7596866 DOI: 10.1021/acscentsci.0c00732] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Indexed: 05/15/2023]
Abstract
Vaccines aim to elicit a robust, yet targeted, immune response. Failure of a vaccine to elicit such a response arises in part from inappropriate temporal control over antigen and adjuvant presentation to the immune system. In this work, we sought to exploit the immune system's natural response to extended pathogen exposure during infection by designing an easily administered slow-delivery vaccine platform. We utilized an injectable and self-healing polymer-nanoparticle (PNP) hydrogel platform to prolong the codelivery of vaccine components to the immune system. We demonstrated that these hydrogels exhibit unique delivery characteristics, whereby physicochemically distinct compounds (such as antigen and adjuvant) could be codelivered over the course of weeks. When administered in mice, hydrogel-based sustained vaccine exposure enhanced the magnitude, duration, and quality of the humoral immune response compared to standard PBS bolus administration of the same model vaccine. We report that the creation of a local inflammatory niche within the hydrogel, coupled with sustained exposure of vaccine cargo, enhanced the magnitude and duration of germinal center responses in the lymph nodes. This strengthened germinal center response promoted greater antibody affinity maturation, resulting in a more than 1000-fold increase in antigen-specific antibody affinity in comparison to bolus immunization. In summary, this work introduces a simple and effective vaccine delivery platform that increases the potency and durability of subunit vaccines.
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Affiliation(s)
- Gillie
A. Roth
- Department
of Bioengineering, Stanford University, Stanford, California 94305, United States
| | - Emily C. Gale
- Department
of Biochemistry, Stanford University School
of Medicine, Stanford, California 94305, United States
| | - Marcela Alcántara-Hernández
- Department
of Microbiology & Immunology, Stanford
University School of Medicine, Stanford, California 94305, United States
- Program
in Immunology, Stanford University School
of Medicine, Stanford, California 94305, United States
| | - Wei Luo
- Institute
for Immunity, Transplantation & Infection, Stanford University School of Medicine, Stanford, California 94305, United States
| | - Eneko Axpe
- Department
of Materials Science & Engineering, Stanford University, Stanford, California 94305, United States
| | - Rohit Verma
- Institute
for Immunity, Transplantation & Infection, Stanford University School of Medicine, Stanford, California 94305, United States
| | - Qian Yin
- Institute
for Immunity, Transplantation & Infection, Stanford University School of Medicine, Stanford, California 94305, United States
| | - Anthony C. Yu
- Department
of Materials Science & Engineering, Stanford University, Stanford, California 94305, United States
| | - Hector Lopez Hernandez
- Department
of Materials Science & Engineering, Stanford University, Stanford, California 94305, United States
| | - Caitlin L. Maikawa
- Department
of Bioengineering, Stanford University, Stanford, California 94305, United States
| | - Anton A. A. Smith
- Department
of Materials Science & Engineering, Stanford University, Stanford, California 94305, United States
| | - Mark M. Davis
- Department
of Microbiology & Immunology, Stanford
University School of Medicine, Stanford, California 94305, United States
- Program
in Immunology, Stanford University School
of Medicine, Stanford, California 94305, United States
- Institute
for Immunity, Transplantation & Infection, Stanford University School of Medicine, Stanford, California 94305, United States
- The
Howard Hughes Medical Institute, Stanford
University School of Medicine, Stanford, California 94305, United States
| | - Bali Pulendran
- Department
of Microbiology & Immunology, Stanford
University School of Medicine, Stanford, California 94305, United States
- Program
in Immunology, Stanford University School
of Medicine, Stanford, California 94305, United States
- Institute
for Immunity, Transplantation & Infection, Stanford University School of Medicine, Stanford, California 94305, United States
- Department
of Pathology, Stanford University School
of Medicine, Stanford, California 94305, United States
- ChEM-H
Institute, Stanford University, Stanford, California 94305, United States
| | - Juliana Idoyaga
- Department
of Microbiology & Immunology, Stanford
University School of Medicine, Stanford, California 94305, United States
- Program
in Immunology, Stanford University School
of Medicine, Stanford, California 94305, United States
- Institute
for Immunity, Transplantation & Infection, Stanford University School of Medicine, Stanford, California 94305, United States
- ChEM-H
Institute, Stanford University, Stanford, California 94305, United States
| | - Eric A. Appel
- Department
of Bioengineering, Stanford University, Stanford, California 94305, United States
- Institute
for Immunity, Transplantation & Infection, Stanford University School of Medicine, Stanford, California 94305, United States
- Department
of Materials Science & Engineering, Stanford University, Stanford, California 94305, United States
- ChEM-H
Institute, Stanford University, Stanford, California 94305, United States
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45
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Qu W, Chen B, Shu W, Tian H, Ou X, Zhang X, Wang Y, Wu M. Polymer-Based Scaffold Strategies for Spinal Cord Repair and Regeneration. Front Bioeng Biotechnol 2020; 8:590549. [PMID: 33117788 PMCID: PMC7576679 DOI: 10.3389/fbioe.2020.590549] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Accepted: 09/14/2020] [Indexed: 12/22/2022] Open
Abstract
The injury to the spinal cord is among the most complex fields of medical development. Spinal cord injury (SCI) leads to acute loss of motor and sensory function beneath the injury level and is linked to a dismal prognosis. Currently, while a strategy that could heal the injured spinal cord remains unforeseen, the latest advancements in polymer-mediated approaches demonstrate promising treatment forms to remyelinate or regenerate the axons and to integrate new neural cells in the SCI. Moreover, they possess the capacity to locally deliver synergistic cells, growth factors (GFs) therapies and bioactive substances, which play a critical role in neuroprotection and neuroregeneration. Here, we provide an extensive overview of the SCI characteristics, the pathophysiology of SCI, and strategies and challenges for the treatment of SCI in a review. This review highlights the recent encouraging applications of polymer-based scaffolds in developing the novel SCI therapy.
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Affiliation(s)
- Wenrui Qu
- Department of Hand Surgery, The Second Hospital of Jilin University, Changchun, China
| | - Bingpeng Chen
- The Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun, China
| | - Wentao Shu
- Department of Biobank, Division of Clinical Research, The First Hospital of Jilin University, Changchun, China.,Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, The First Hospital of Jilin University, Changchun, China
| | - Heng Tian
- Department of Hand Surgery, The Second Hospital of Jilin University, Changchun, China
| | - Xiaolan Ou
- Department of Hand Surgery, The Second Hospital of Jilin University, Changchun, China
| | - Xi Zhang
- Department of Burn Surgery, The First Hospital of Jilin University, Changchun, China
| | - Yinan Wang
- Department of Biobank, Division of Clinical Research, The First Hospital of Jilin University, Changchun, China.,Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, The First Hospital of Jilin University, Changchun, China
| | - Minfei Wu
- The Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun, China
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