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Wang M, Li W, Mille LS, Ching T, Luo Z, Tang G, Garciamendez CE, Lesha A, Hashimoto M, Zhang YS. Digital Light Processing Based Bioprinting with Composable Gradients. Adv Mater 2022; 34:e2107038. [PMID: 34609032 PMCID: PMC8741743 DOI: 10.1002/adma.202107038] [Citation(s) in RCA: 51] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Indexed: 05/23/2023]
Abstract
Recapitulation of complex tissues signifies a remarkable challenge and, to date, only a few approaches have emerged that can efficiently reconstruct necessary gradients in 3D constructs. This is true even though mimicry of these gradients is of great importance to establish the functionality of engineered tissues and devices. Here, a composable-gradient Digital Light Processing (DLP)-based (bio)printing system is developed, utilizing the unprecedented integration of a microfluidic mixer for the generation of either continual or discrete gradients of desired (bio)inks in real time. Notably, the precisely controlled gradients are composable on-the-fly by facilely by adjusting the (bio)ink flow ratios. In addition, this setup is designed in such a way that (bio)ink waste is minimized when exchanging the gradient (bio)inks, further enhancing this time- and (bio)ink-saving strategy. Various planar and 3D structures exhibiting continual gradients of materials, of cell densities, of growth factor concentrations, of hydrogel stiffness, and of porosities in horizontal and/or vertical direction, are exemplified. The composable fabrication of multifunctional gradients strongly supports the potential of the unique bioprinting system in numerous biomedical applications.
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Affiliation(s)
- Mian Wang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
| | - Wanlu Li
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
| | - Luis S. Mille
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
| | - Terry Ching
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
- Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore 48737
- Digital Manufacturing and Design Centre, Singapore University of Technology and Design, Singapore 487372
- Department of Biomedical Engineering, National University of Singapore, Singapore 117583
| | - Zeyu Luo
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
| | - Guosheng Tang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
| | - Carlos Ezio Garciamendez
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
| | - Ami Lesha
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
| | - Michinao Hashimoto
- Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore 48737
- Digital Manufacturing and Design Centre, Singapore University of Technology and Design, Singapore 487372
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
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Vu MN, Kelly HG, Tan H, Juno JA, Esterbauer R, Davis TP, Truong NP, Wheatley AK, Kent SJ. Hemagglutinin Functionalized Liposomal Vaccines Enhance Germinal Center and Follicular Helper T Cell Immunity. Adv Healthc Mater 2021; 10:e2002142. [PMID: 33690985 PMCID: PMC8206650 DOI: 10.1002/adhm.202002142] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/15/2021] [Indexed: 12/12/2022]
Abstract
Despite remarkable successes of immunization in protecting public health, safe and effective vaccines against a number of life-threatening pathogens such as HIV, ebola, influenza, and SARS-CoV-2 remain urgently needed. Subunit vaccines can avoid potential toxicity associated with traditional whole virion-inactivated and live-attenuated vaccines; however, the immunogenicity of subunit vaccines is often poor. A facile method is here reported to produce lipid nanoparticle subunit vaccines that exhibit high immunogenicity and elicit protection against influenza virus. Influenza hemagglutinin (HA) immunogens are functionalized on the surface of liposomes via stable metal chelation chemistry, using a scalable advanced microfluidic mixing technology (NanoAssemblr). Immunization of mice with HA-liposomes elicits increased serum antibody titers and superior protection against highly pathogenic virus challenge compared with free HA protein. HA-liposomal vaccines display enhanced antigen deposition into germinal centers within the draining lymph nodes, driving increased HA-specific B cell, and follicular helper T cell responses. This work provides mechanistic insights into highly protective HA-liposome vaccines and informs the rational design and rapid production of next generation nanoparticle subunit vaccines.
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Affiliation(s)
- Mai N. Vu
- Australian Research Council Centre of Excellence in Convergent Bio‐Nano Science and TechnologyMonash UniversityParkvilleVIC3052Australia
- Monash Institute of Pharmaceutical SciencesMonash UniversityParkvilleVIC3052Australia
- Peter Doherty Institute for Infection and ImmunityUniversity of MelbourneMelbourneVIC3000Australia
- Department of PharmaceuticsHanoi University of PharmacyHanoi10000Vietnam
| | - Hannah G. Kelly
- Australian Research Council Centre of Excellence in Convergent Bio‐Nano Science and TechnologyMonash UniversityParkvilleVIC3052Australia
- Peter Doherty Institute for Infection and ImmunityUniversity of MelbourneMelbourneVIC3000Australia
| | - Hyon‐Xhi Tan
- Australian Research Council Centre of Excellence in Convergent Bio‐Nano Science and TechnologyMonash UniversityParkvilleVIC3052Australia
- Peter Doherty Institute for Infection and ImmunityUniversity of MelbourneMelbourneVIC3000Australia
| | - Jennifer A. Juno
- Peter Doherty Institute for Infection and ImmunityUniversity of MelbourneMelbourneVIC3000Australia
| | - Robyn Esterbauer
- Australian Research Council Centre of Excellence in Convergent Bio‐Nano Science and TechnologyMonash UniversityParkvilleVIC3052Australia
- Peter Doherty Institute for Infection and ImmunityUniversity of MelbourneMelbourneVIC3000Australia
| | - Thomas P. Davis
- Australian Research Council Centre of Excellence in Convergent Bio‐Nano Science and TechnologyMonash UniversityParkvilleVIC3052Australia
- Monash Institute of Pharmaceutical SciencesMonash UniversityParkvilleVIC3052Australia
- Australia Institute of Bioengineering & NanotechnologyUniversity of QueenslandBrisbaneQLD4072Australia
| | - Nghia P. Truong
- Australian Research Council Centre of Excellence in Convergent Bio‐Nano Science and TechnologyMonash UniversityParkvilleVIC3052Australia
- Monash Institute of Pharmaceutical SciencesMonash UniversityParkvilleVIC3052Australia
| | - Adam K. Wheatley
- Australian Research Council Centre of Excellence in Convergent Bio‐Nano Science and TechnologyMonash UniversityParkvilleVIC3052Australia
- Peter Doherty Institute for Infection and ImmunityUniversity of MelbourneMelbourneVIC3000Australia
| | - Stephen J. Kent
- Australian Research Council Centre of Excellence in Convergent Bio‐Nano Science and TechnologyMonash UniversityParkvilleVIC3052Australia
- Peter Doherty Institute for Infection and ImmunityUniversity of MelbourneMelbourneVIC3000Australia
- Melbourne Sexual Health Centre and Department of Infectious Diseases, Alfred Hospital and Central Clinical SchoolMonash UniversityMelbourneVIC3004Australia
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Lavrentieva A, Fleischhammer T, Enders A, Pirmahboub H, Bahnemann J, Pepelanova I. Fabrication of Stiffness Gradients of GelMA Hydrogels Using a 3D Printed Micromixer. Macromol Biosci 2020; 20:e2000107. [PMID: 32537875 DOI: 10.1002/mabi.202000107] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/20/2020] [Indexed: 11/09/2022]
Abstract
Many properties in both healthy and pathological tissues are highly influenced by the mechanical properties of the extracellular matrix. Stiffness gradient hydrogels are frequently used for exploring these complex relationships in mechanobiology. In this study, the fabrication of a simple, cost-efficient, and versatile system is reported for creation of stiffness gradients from photoactive hydrogels like gelatin-methacryloyl (GelMA). The setup includes syringe pumps for gradient generation and a 3D printed microfluidic device for homogenous mixing of GelMA precursors with different crosslinker concentration. The stiffness gradient is investigated by using rheology. A co-culture consisting of human adipose tissue-derived mesenchymal stem cells (hAD-MSCs) and human umbilical cord vein endothelial cells (HUVECs) is encapsulated in the gradient construct. It is possible to locate the stiffness ranges at which the studied cells displayed specific spreading morphology and migration rates. With the help of the described system, variable mechanical gradient constructs can be created and optimal 3D cell culture conditions can be experientially identified.
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Affiliation(s)
- Antonina Lavrentieva
- Institute of Technical Chemistry, Leibniz University of Hannover, Callinstrasse 5, Hannover, 30167, Germany
| | - Tabea Fleischhammer
- Institute of Technical Chemistry, Leibniz University of Hannover, Callinstrasse 5, Hannover, 30167, Germany
| | - Anton Enders
- Institute of Technical Chemistry, Leibniz University of Hannover, Callinstrasse 5, Hannover, 30167, Germany
| | - Hamidreza Pirmahboub
- Institute of Cell Biology and Biophysics, Leibniz University of Hannover, Herrenhäuser Str. 2, Hannover, 30419, Germany
| | - Janina Bahnemann
- Institute of Technical Chemistry, Leibniz University of Hannover, Callinstrasse 5, Hannover, 30167, Germany
| | - Iliyana Pepelanova
- Institute of Technical Chemistry, Leibniz University of Hannover, Callinstrasse 5, Hannover, 30167, Germany
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Odetade DF, Vladisavljevic GT. Microfluidic Fabrication of Hydrocortisone Nanocrystals Coated with Polymeric Stabilisers. Micromachines (Basel) 2016; 7:mi7120236. [PMID: 30404408 PMCID: PMC6190127 DOI: 10.3390/mi7120236] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 12/02/2016] [Accepted: 12/14/2016] [Indexed: 11/26/2022]
Abstract
Hydrocortisone (HC) nanocrystals intended for parenteral administration of HC were produced by anti-solvent crystallisation within coaxial assemblies of pulled borosilicate glass capillaries using either co-current flow of aqueous and organic phases or counter-current flow focusing. The organic phase was composed of 7 mg/mL of HC in a 60:40 (v/v) mixture of ethanol and water and the anti-solvent was milli-Q water. The microfluidic mixers were fabricated with an orifice diameter of the inner capillary ranging from 50 µm to 400 µm and operated at the aqueous to organic phase flow rate ratio ranging from 5 to 25. The size of the nanocrystals decreased with increasing aqueous to organic flow rate ratio. The counter-current flow microfluidic mixers provided smaller nanocrystals than the co-current flow devices under the same conditions and for the same geometry, due to smaller diameter of the organic phase stream in the mixing zone. The Z-average particle size of the drug nanocrystals increased from 210–280 nm to 320–400 nm after coating the nanocrystals with 0.2 wt % aqueous solution of hydroxypropyl methylcellulose (HPMC) in a stirred vial. The differential scanning calorimetry (DSC) and X-ray powder diffraction (XRPD) analyses carried out on the dried nanocrystals stabilized with HPMC, polyvinyl pyrrolidone (PVP), and sodium lauryl sulfate (SLS) were investigated and reported. The degree of crystallinity for the processed sample was lowest for the sample stabilised with HPMC and the highest for the raw HC powder.
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Affiliation(s)
- David F Odetade
- Department of Chemical Engineering, Loughborough University, Epinal Way, Loughborough, Leicestershire LE11 3TU, UK.
| | - Goran T Vladisavljevic
- Department of Chemical Engineering, Loughborough University, Epinal Way, Loughborough, Leicestershire LE11 3TU, UK.
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