Bioprinting of Injectable Centimeter-scale Architectures with a Visible-light Crosslinking Bioink
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PROVIDER: PRJNA957298 | ENA |
REPOSITORIES: ENA
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Project description:This study propose a novel visible-light crosslinking hydrogel bioink (termed GP) to fabricate injectable centimeter-scale architectures. Composed of GelMA with large molecular weight PEGDA, GP can form a reinforced dual-crosslinking network, presenting excellent superelasticity and stability, supporting injection pass nozzles with 1.5mm inner diameter after bioprinted as 15mm×15mm scale architectures. Moreover, when printing with living cells, even for sensitive cell lines like genome-edited cells, the transcriptome of cells after printing shows no difference, suggesting the high cell printing suitability of GP and the visible-light extrusion printing technique. The printed architectures can support long-term culture for at least 14 days, and GP provides cells with a biocompatible microenvironment, supporting cell survival, proliferation, and function maintenance.
2023-10-19 | GSE230068 | GEO
Project description:Bioprinting is an emerging additive manufacturing approach to the fabrication of patient-specific, implantable three-dimensional (3D) constructs for regenerative medicine. However, developing cell-compatible bioinks with high printability, structural stability, biodegradability, and bioactive characteristics is still a primary challenge for translating 3D bioprinting technology to preclinical and clinal models. To overcome this challenge, we develop a nanoengineered ionic covalent entanglement (NICE) bioink formulation for 3D bone bioprinting. The NICE bioinks allow precise control over printability, mechanical properties, and degradation characteristics, enabling custom 3D fabrication of mechanically resilient, cellularized structures. We demonstrate cell- induced remodeling of 3D bioprinted scaffolds over 60 days, demonstrating deposition of nascent extracellular matrix proteins. Interestingly, the bioprinted constructs induce endochondral differentiation of encapsulated human mesenchymal stem cells (hMSCs) in absence of osteoinducing agents such as dexamethasone or bone morphogenic protein-2 (BMP-2). Using next-generation transcriptome sequencing (RNA-seq) technology, we establish the role of nanosilicates, a bioactive component of NICE bioink, to stimulate endochondral differentiation at the transcriptome level. Overall, the osteoinductive bioink has the ability to induce formation of osteo-related mineralized extracellular matrix by encapsulatedhMSCsingrowthfactor-freeconditions.Furthermore,wedemonstratedtheabilityofNICEbioinktofabricatepatient-specific, implantable 3D scaffolds for repair of craniomaxillofacial bone defects. We envision transformation of this NICE bioink technology toward a realistic clinical process for 3D bioprinting patient-specific bone tissue for regenerative medicine.
2020-03-04 | GSE146309 | GEO
Project description:Artificial visible light is everywhere in our modern life. Our mode of social communication confronts us with screens of all kinds and their use is on the rise. People are therefore increasingly exposed to artificial visible light of which effects on skin are still largely poorly known. The purpose of this study was to model the artificial visible light emitted by electronic devices and subsequently assess the effect of such a light in normal human fibroblasts.
2018-06-30 | GSE112614 | GEO
Project description:Pterygium is an ocular surface disorder with high prevalence that can lead to vision impairment. As a pathological outgrowth of conjunctiva, pterygium involves neovascularization and chronic inflammation, but its pathogenesis remains largely unknown. Over the last decade, various types of disease models have been built to study pterygium. Here, we developed a 3D multicellular in vitro pterygium model using the digital light processing (DLP)-based 3D bioprinting of human conjunctival stem cells (hCjSCs). A novel feeder-free culture system was adopted and efficiently expanded the primary hCjSCs with homogeneity, stemness and differentiation potency. The DLP-based 3D bioprinting was able to fabricate hydrogel scaffolds that support the viability and biological integrity of the encapsulated hCjSCs. The bioprinted 3D pterygium model was fabricated with hCjSCs, immune cells and vascular cells to recapitulate the disease microenvironment. Transcriptomic analysis using RNA sequencing (RNA-seq) identified a distinct profile correlated to inflammation response, angiogenesis, and epithelial mesenchymal transition in the bioprinted 3D pterygium model. In addition, the pterygium signatures and disease relevance of the bioprinted model were validated with the public RNA-seq data from patient-derived pterygium tissues. By integrating the stem cell technology and 3D bioprinting, this is the first reported 3D in vitro disease model for pterygium that can be utilized by future studies towards the personalized medicine and the drug screening.
2022-06-01 | GSE180343 | GEO
Project description:Delivery of therapeutic stem cells to treat bone tissue damage is a promising strategy that faces many hurdles to clinical translation. Among them is the design of a delivery vehicle which promotes desired cell behavior for new bone formation. In this work, we describe the use of an injectable microporous hydrogel, made of crosslinked gelatin microgels, for the encapsulation and delivery of human mesenchymal stem cells (MSCs) and compared it to a traditional nonporous injectable hydrogel. MSCs encapsulated in the microporous hydrogel showed rapid cell spreading with direct cell-cell connections whereas the MSCs in the nonporous hydrogel were entrapped by the surrounding polymer mesh and isolated from each other. Microporous hydrogel induced more robust osteogenic differentiation of MSCs and calcium mineral deposition than the nonporous hydrogel confirmed by alkaline phosphatase (ALP) assay and calcium assay. RNA-seq confirmed the upregulation of the genes and pathways that are associated with cell spreading and cell-cell connections, as well as the osteogenesis in the microporous hydrogel. These results demonstrate that the microgel-based injectable hydrogels can be useful tools for therapeutic cell delivery for bone tissue repair.
2024-04-15 | GSE263939 | GEO
Project description:Capturing cell-to-cell and cell-to-environment signals in a defined 3 dimensional (3D) microenvironment is key to study cellular functions, including cellular reprogramming towards tissue regeneration. A major challenge in current culturing methods is that these methods cannot accurately capture this multicellular 3D microenvironment. In this study, we established the framework of 3D bioprinting with plant cells to study cell viability, cell division, and cell identity. To investigate the cellular reprogramming underlying the initial cell divisions prior to microcallus formation, we collected RNA from isolated differentiated root cells immediately, 1, and 3 days after bioprinting. We showed the cell cycle re-entry of the isolated Arabidopsis and soybean cells leading to the formation of microcalli and of which the timing coincides with the induction of core cell cycle genes and regeneration-related genes. Finally, we showed that the identity of isolated cells of Arabidopsis roots expressing endodermal markers maintained longer periods of time. The framework established in this study paves the way for a general use of 3D bioprinting for studying cellular reprogramming and cell cycle re-entry towards tissue regeneration.
2022-08-15 | GSE208176 | GEO
Project description:Effect of visible light on human skin fibroblasts
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Project description:Liver is dynamic, heterogeneous, and each cell type acts in concert to regulate its function. In vitro morphogenesis is limited, and self-assembled biliary and blood vessels system are absent from manufactured liver tissues. The combination of bioprinting and organoid technique offers spatial and cellular control over three-dimensional (3D) organ tissue manufacturing, allowing to build liver tissues with self-assembled structure in vitro. We developed a high-throughput PDMS microwell platform (PMP) generating uniform and functional hepatic organoid building blocks (HOBBs) which displayed cellular crosstalk and self-assembled structure. For bioprinting process, we developed three-level temperature control system and new quadratic material, i.e., alginate-gelatin-collagen-laminin (AGCL) biomaterial, realizing reproducible construction of liver tissues with requisite cellular density. Under long-term differentiation, bioprinted liver tissues exhibited enhanced hepatobiliary function, intrahepatic bile duct networks and angiogenic potential. To investigate the regulatory mechanisms of multicellular crosstalk and self-assembled of HOBBS, biliary branching morphogenesis, biomimetic liver tissue formation, and angiogenesis of HABs, transcriptome analysis was performed.
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Project description:This is a Phase 1 open-label study of SN2310 Injectable Emulsion in patients with advanced solid malignancies. The study is designed to determine the maximum tolerated dose and dose-limiting toxicity of SN2310 Injectable Emulsion, and to characterize the pharmacokinetics of SN2310 and SN-38 following intravenous administration of SN2310 Injectable Emulsion. Additionally, evaluation of side effects as a function of dose, and observation of any anti-tumor effects of SN2310 Injectable Emulsion will be made.
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Project description:4D printing represents one of the most advanced fabrication techniques for prospective applications in tissue engineering, biomedical devices, and soft robotics, among others. In this study, a novel multiresponsive architecture is developed through stereolithography-based 4D printing, where a universal concept of stress-induced shape transformation is applied to achieve the 4D reprogramming. The light-induced graded internal stress followed by a subsequent solvent-induced relaxation, driving an autonomous and reversible change of the programmed configuration after printing, is employed and investigated in depth and details. Moreover, the fabricated construct possesses shape memory property, offering a characteristic of multiple shape change. Using this novel multiple responsive 4D technique, a proof-of-concept smart nerve guidance conduit is demonstrated on a graphene hybrid 4D construct providing outstanding multifunctional characteristics for nerve regeneration including physical guidance, chemical cues, dynamic self-entubulation, and seamless integration. By employing this fabrication technique, creating multiresponsive smart architectures, as well as demonstrating application potential, this work paves the way for truly initiation of 4D printing in various high-value research fields.
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