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Sonnentag SJ, Jenne F, Orian-Rousseau V, Nesterov-Mueller A. High-throughput screening for cell binding and repulsion peptides on multifunctionalized surfaces. Commun Biol 2024; 7:870. [PMID: 39020032 PMCID: PMC11255233 DOI: 10.1038/s42003-024-06541-7] [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: 10/11/2023] [Accepted: 07/03/2024] [Indexed: 07/19/2024] Open
Abstract
The adhesion of cells to the extracellular matrix engages cell surface receptors such as integrins, proteoglycans and other types of cell adhesion molecules such as CD44. To closely examine the determinants of cell adhesion, herein we describe the generation of high-density peptide arrays and test the growth of cells on these multifunctionalized surfaces. The peptide library used consists of over 11,000 different sequences, either random or derived from existing proteins. By applying this screen to SW620 mCherry colorectal cancer cells, we select for peptides with both maximum cell adhesion and maximum cell repulsion. All of these extreme properties are based on unique combinations of amino acids. Here, we identify peptides with maximum cell repulsion on secreted frizzled- and Dickkopf-related proteins. Peptides with strong cell repulsion are found at the poles of the TNF-alpha homotrimer. The formation of cellular patterns on alternating highly repulsive and adhesive peptides are examined. Our screen allows the identification of peptides suitable for biomedical and tissue engineering applications.
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Affiliation(s)
- Steffen J Sonnentag
- Institute of Biological and Chemical Systems - Functional Molecular Systems, Karlsruhe Institute of Technology, Kaiserstraße 12, 76131, Karlsruhe, Germany
| | - Felix Jenne
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, Kaiserstraße 12, 76131, Karlsruhe, Germany
| | - Véronique Orian-Rousseau
- Institute of Biological and Chemical Systems - Functional Molecular Systems, Karlsruhe Institute of Technology, Kaiserstraße 12, 76131, Karlsruhe, Germany.
| | - Alexander Nesterov-Mueller
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, Kaiserstraße 12, 76131, Karlsruhe, Germany.
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2
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Quiles MT, Rodríguez-Contreras A, Guillem-Marti J, Punset M, Sánchez-Soto M, López-Cano M, Sabadell J, Velasco J, Armengol M, Manero JM, Arbós MA. Effect of Functionalization of Texturized Polypropylene Surface by Silanization and HBII-RGD Attachment on Response of Primary Abdominal and Vaginal Fibroblasts. Polymers (Basel) 2024; 16:667. [PMID: 38475352 DOI: 10.3390/polym16050667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 02/24/2024] [Accepted: 02/26/2024] [Indexed: 03/14/2024] Open
Abstract
Soft tissue defects, such as incisional hernia or pelvic organ prolapse, are prevalent pathologies characterized by a tissue microenvironment rich in fragile and dysfunctional fibroblasts. Precision medicine could improve their surgical repair, currently based on polymeric materials. Nonetheless, biomaterial-triggered interventions need first a better understanding of the cell-material interfaces that truly consider the patients' biology. Few tools are available to study the interactions between polymers and dysfunctional soft tissue cells in vitro. Here, we propose polypropylene (PP) as a matrix to create microscale surfaces w/wo functionalization with an HBII-RGD molecule, a fibronectin fragment modified to include an RGD sequence for promoting cell attachment and differentiation. Metal mold surfaces were roughened by shot blasting with aluminum oxide, and polypropylene plates were obtained by injection molding. HBII-RGD was covalently attached by silanization. As a proof of concept, primary abdominal and vaginal wall fasciae fibroblasts from control patients were grown on the new surfaces. Tissue-specific significant differences in cell morphology, early adhesion and cytoskeletal structure were observed. Roughness and biofunctionalization parameters exerted unique and combinatorial effects that need further investigation. We conclude that the proposed model is effective and provides a new framework to inform the design of smart materials for the treatment of clinically compromised tissues.
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Affiliation(s)
- Maria Teresa Quiles
- General Surgery Research Unit, Vall d'Hebron Research Institute (VHIR), Passeig Vall d'Hebron 119-129, 08035 Barcelona, Spain
- Department of Basic Sciences, School of Medicine and Health Sciences, Universitat Internacional de Catalunya (UIC), Josep Trueta, s/n, 08195 Sant Cugat del Vallés, Spain
| | - Alejandra Rodríguez-Contreras
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department Materials Science and Engineering, Universitat Politècnica de Catalunya-Barcelona Tech (UPC), Escola d'Enginyeria de Barcelona Est (EEBE), Campus Diagonal-Besòs, Av. Eduard Maristany, 16, 08019 Barcelona, Spain
- Department Materials Science and Engineering, Universitat Politècnica de Catalunya-Barcelona Tech (UPC), Escola d'Enginyeria de Barcelona Est (EEBE), Campus Diagonal-Besòs, Av. D'Eduard Maristany, 16, 08019 Barcelona, Spain
- Networking Research Centre of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Institute of Health Carlos III, 28029 Madrid, Spain
| | - Jordi Guillem-Marti
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department Materials Science and Engineering, Universitat Politècnica de Catalunya-Barcelona Tech (UPC), Escola d'Enginyeria de Barcelona Est (EEBE), Campus Diagonal-Besòs, Av. Eduard Maristany, 16, 08019 Barcelona, Spain
- Department Materials Science and Engineering, Universitat Politècnica de Catalunya-Barcelona Tech (UPC), Escola d'Enginyeria de Barcelona Est (EEBE), Campus Diagonal-Besòs, Av. D'Eduard Maristany, 16, 08019 Barcelona, Spain
- Networking Research Centre of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Institute of Health Carlos III, 28029 Madrid, Spain
| | - Miquel Punset
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department Materials Science and Engineering, Universitat Politècnica de Catalunya-Barcelona Tech (UPC), Escola d'Enginyeria de Barcelona Est (EEBE), Campus Diagonal-Besòs, Av. Eduard Maristany, 16, 08019 Barcelona, Spain
- Department Materials Science and Engineering, Universitat Politècnica de Catalunya-Barcelona Tech (UPC), Escola d'Enginyeria de Barcelona Est (EEBE), Campus Diagonal-Besòs, Av. D'Eduard Maristany, 16, 08019 Barcelona, Spain
| | - Miguel Sánchez-Soto
- Department Materials Science and Engineering, Universitat Politècnica de Catalunya-Barcelona Tech (UPC), Escola d'Enginyeria de Barcelona Est (EEBE), Campus Diagonal-Besòs, Av. D'Eduard Maristany, 16, 08019 Barcelona, Spain
| | - Manuel López-Cano
- General Surgery Research Unit, Vall d'Hebron Research Institute (VHIR), Passeig Vall d'Hebron 119-129, 08035 Barcelona, Spain
- Abdominal Wall Surgery Unit, Department of General Surgery, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona (UAB), Passeig Vall d'Hebron 119-129, 08035 Barcelona, Spain
| | - Jordi Sabadell
- General Surgery Research Unit, Vall d'Hebron Research Institute (VHIR), Passeig Vall d'Hebron 119-129, 08035 Barcelona, Spain
- Urogynecology and Pelvic Floor Unit, Department of Gynecology, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona (UAB), Passeig Vall d'Hebron 119-129, 08035 Barcelona, Spain
| | - Janice Velasco
- Department of Surgery, Hospital San Rafael, Germanes Hospitalàries, Passeig de la Vall d'Hebron, 107, 08035 Barcelona, Spain
| | - Manuel Armengol
- General Surgery Research Unit, Vall d'Hebron Research Institute (VHIR), Passeig Vall d'Hebron 119-129, 08035 Barcelona, Spain
- Department of General Surgery, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona (UAB), Passeig Vall d'Hebron 119-129, 08035 Barcelona, Spain
| | - Jose Maria Manero
- Biomaterials, Biomechanics and Tissue Engineering Group (BBT), Department Materials Science and Engineering, Universitat Politècnica de Catalunya-Barcelona Tech (UPC), Escola d'Enginyeria de Barcelona Est (EEBE), Campus Diagonal-Besòs, Av. Eduard Maristany, 16, 08019 Barcelona, Spain
- Department Materials Science and Engineering, Universitat Politècnica de Catalunya-Barcelona Tech (UPC), Escola d'Enginyeria de Barcelona Est (EEBE), Campus Diagonal-Besòs, Av. D'Eduard Maristany, 16, 08019 Barcelona, Spain
- Networking Research Centre of Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Institute of Health Carlos III, 28029 Madrid, Spain
| | - Maria Antònia Arbós
- General Surgery Research Unit, Vall d'Hebron Research Institute (VHIR), Passeig Vall d'Hebron 119-129, 08035 Barcelona, Spain
- Department of Basic Sciences, School of Medicine and Health Sciences, Universitat Internacional de Catalunya (UIC), Josep Trueta, s/n, 08195 Sant Cugat del Vallés, Spain
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Sun L, Bian F, Xu D, Luo Y, Wang Y, Zhao Y. Tailoring biomaterials for biomimetic organs-on-chips. MATERIALS HORIZONS 2023; 10:4724-4745. [PMID: 37697735 DOI: 10.1039/d3mh00755c] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/13/2023]
Abstract
Organs-on-chips are microengineered microfluidic living cell culture devices with continuously perfused chambers penetrating to cells. By mimicking the biological features of the multicellular constructions, interactions among organs, vascular perfusion, physicochemical microenvironments, and so on, these devices are imparted with some key pathophysiological function levels of living organs that are difficult to be achieved in conventional 2D or 3D culture systems. In this technology, biomaterials are extremely important because they affect the microstructures and functionalities of the organ cells and the development of the organs-on-chip functions. Thus, herein, we provide an overview on the advances of biomaterials for the construction of organs-on-chips. After introducing the general components, structures, and fabrication techniques of the biomaterials, we focus on the studies of the functions and applications of these biomaterials in the organs-on-chips systems. Applications of the biomaterial-based organs-on-chips as alternative animal models for pharmaceutical, chemical, and environmental tests are described and highlighted. The prospects for exciting future directions and the challenges of biomaterials for realizing the further functionalization of organs-on-chips are also presented.
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Affiliation(s)
- Lingyu Sun
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
| | - Feika Bian
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
| | - Dongyu Xu
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
| | - Yuan Luo
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China.
| | - Yongan Wang
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China.
| | - Yuanjin Zhao
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
- Southeast University Shenzhen Research Institute, Shenzhen 518071, China
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Shi L, Liu S, Li X, Huang X, Luo H, Bai Q, Li Z, Wang L, Du X, Jiang C, Liu S, Li C. Droplet microarray platforms for high-throughput drug screening. Mikrochim Acta 2023; 190:260. [PMID: 37318602 DOI: 10.1007/s00604-023-05833-9] [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: 03/18/2023] [Accepted: 05/15/2023] [Indexed: 06/16/2023]
Abstract
High-throughput screening platforms are fundamental for the rapid and efficient processing of large amounts of experimental data. Parallelization and miniaturization of experiments are important for improving their cost-effectiveness. The development of miniaturized high-throughput screening platforms is essential in the fields of biotechnology, medicine, and pharmacology. Currently, most laboratories use 96- or 384-well microtiter plates for screening; however, they have disadvantages, such as high reagent and cell consumption, low throughput, and inability to avoid cross-contamination, which need to be further optimized. Droplet microarrays, as novel screening platforms, can effectively avoid these shortcomings. Here, the preparation method of the droplet microarray, method of adding compounds in parallel, and means to read the results are briefly described. Next, the latest research on droplet microarray platforms in biomedicine is presented, including their application in high-throughput culture, cell screening, high-throughput nucleic acid screening, drug development, and individualized medicine. Finally, the challenges and future trends in droplet microarray technology are summarized.
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Affiliation(s)
- Lina Shi
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Sutong Liu
- Juxing College of Digital Economics, Haikou University of Economics, Haikou, 570100, China
| | - Xue Li
- Sichuan Hanyuan County People's Hospital, Hanyuan, 625300, China
| | - Xiwei Huang
- Ministry of Education Key Lab of RFCircuits and Systems, Hangzhou Dianzi University, Hangzhou, 310038, China
| | - Hongzhi Luo
- Department of Laboratory Medicine, The Third Affiliated Hospital of Zunyi Medical University (The First People's Hospital of Zunyi), Zunyi, 563002, China
| | - Qianwen Bai
- Department of Laboratory Medicine, The Third Affiliated Hospital of Zunyi Medical University (The First People's Hospital of Zunyi), Zunyi, 563002, China
| | - Zhu Li
- College of Medical Technology, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, China
| | - Lijun Wang
- Department of Ophthalmology, The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, Chengdu, 610031, China
| | - Xiaoxin Du
- Office of Scientific Research & Development, University of Electronic Science and Technology, Chengdu, 610054, China
| | - Cheng Jiang
- Biomedical Engineering, School of Medicine, The Chinese University of Hong Kong, Shenzhen, 518172, China
| | - Shan Liu
- Sichuan Provincial Key Laboratory for Human Disease Gene Study, Department of Medical Genetics, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, 610072, China.
| | - Chenzhong Li
- Biomedical Engineering, School of Medicine, The Chinese University of Hong Kong, Shenzhen, 518172, China
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Lu DY, Lu TR, Yarla NS, Xu B. Drug Sensitivity Testing for Cancer Therapy, Key Areas. Rev Recent Clin Trials 2022; 17:291-299. [PMID: 35986532 DOI: 10.2174/1574887117666220819094528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Revised: 04/20/2022] [Accepted: 04/20/2022] [Indexed: 01/15/2023]
Abstract
AIMS Cancer is a high-mortality disease (9.6 million deaths in 2018 worldwide). Given various anticancer drugs, drug selection plays a key role in patient survival in clinical trials. METHODS Drug Sensitivity Testing (DST), one of the leading drug selective systems, was widely practiced for therapeutic promotion in the clinic. Notably, DSTs assist in drug selection that benefits drug responses against cancer from 20-22% to 30-35% over the past two decades. The relationship between drug resistance in vitro and drug treatment benefits was associated with different tumor origins and subtypes. Medical theory and underlying DST mechanisms remain poorly understood until now. The study of the clinical scenario, sustainability and financial support for mechanism and technical promotions is indispensable. RESULTS Despite the great technical advance, therapeutic prediction and drug selection by DST needs to be miniature, versatility and cost-effective in the clinic. Multi-parameters and automation of DST should be a future trend. Advanced biomedical knowledge and clinical approaches to translating oncologic profiles into drug selection were the main focuses of DST developments. With a great technical stride, the clinical architecture of the DST platform was entering higher levels (drug response testing at any stage of cancer patients and miniaturization of tumor samples). DISCUSSION The cancer biology and pharmacology for drug selection mutually benefit the clinic. New proposals to reveal more therapeutic information and drug response prediction at genetic, molecular and omics levels should be estimated overall. CONCLUSION By upholding this goal of non-invasive, versatility and automation, DST could save the life of several thousand annually worldwide. In this article, new insights into DST novelty and development are highlighted.
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Affiliation(s)
- Da-Yong Lu
- School of Life Sciences, Shanghai University, Shanghai 200444, PRC, China
| | - Ting-Ren Lu
- College of Science, Shanghai University, Shanghai 200444, PRC, China
| | | | - Bin Xu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, China
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Cruz N, Abernathy GA, Dichosa AEK, Kumar A. The Age of Next-Generation Therapeutic-Microbe Discovery: Exploiting Microbe-Microbe and Host-Microbe Interactions for Disease Prevention. Infect Immun 2022; 90:e0058921. [PMID: 35384688 PMCID: PMC9119102 DOI: 10.1128/iai.00589-21] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Humans are considered "superorganisms," harboring a diverse microbial collective that outnumbers human cells 10 to 1. Complex and gravely understudied host- and microbe-microbe interactions-the product of millions of years of host-microbe coevolution-govern the superorganism in almost every aspect of life functions and overall well-being. Abruptly disrupting these interactions via extrinsic factors has undesirable consequences for the host. On the other hand, supplementing commensal or beneficial microbes may mitigate perturbed interactions or enhance the interactive relationships that ultimately benefit all parties. Hence, immense efforts have focused on dissecting the innumerable host- and microbe-microbe relationships to characterize if a "positive" or "negative" interaction is at play and to exploit such behavior for broader implications. For example, microbiome research has worked to identify and isolate naturally antipathogenic microbes that may offer therapeutic potential either in a direct, one-on-one application or by leveraging its unique metabolic properties. However, the discovery and isolation of such desired therapeutic microbes from complex microbiota have proven challenging. Currently, there is no conventional technique to universally and functionally screen for these microbes. With this said, we first describe in this review the historical (probiotics) and current (fecal microbiota or defined consortia) perspectives on therapeutic microbes, present the discoveries of therapeutic microbes through exploiting microbe-microbe and host-microbe interactions, and detail our team's efforts in discovering therapeutic microbes via our novel microbiome screening platform. We conclude this minireview by briefly discussing challenges and possible solutions with therapeutic microbes' applications and paths ahead for discovery.
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Affiliation(s)
- Nathan Cruz
- B-10: Biosecurity and Public Health Group, Bioscience Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA
| | - George A. Abernathy
- B-10: Biosecurity and Public Health Group, Bioscience Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA
| | - Armand E. K. Dichosa
- B-10: Biosecurity and Public Health Group, Bioscience Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA
| | - Anand Kumar
- B-10: Biosecurity and Public Health Group, Bioscience Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA
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Chakraborty S, Luchena C, Elton JJ, Schilling MP, Reischl M, Roux M, Levkin PA, Popova AA. "Cells-to-cDNA on Chip": Phenotypic Assessment and Gene Expression Analysis from Live Cells in Nanoliter Volumes Using Droplet Microarrays. Adv Healthc Mater 2022; 11:e2102493. [PMID: 35285171 DOI: 10.1002/adhm.202102493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 02/08/2022] [Indexed: 11/11/2022]
Abstract
In vitro cell-based experiments are particularly important in fundamental biological research. Microscopy-based readouts to identify cellular changes in response to various stimuli are a popular choice, but gene expression analysis is essential to delineate the underlying molecular dynamics in cells. However, cell-based experiments often suffer from interexperimental variation, especially while using different readout methods. Therefore, establishment of platforms that allow for cell screening, along with parallel investigations of morphological features, as well as gene expression levels, is crucial. The droplet microarray (DMA) platform enables cell screening in hundreds of nanoliter droplets. In this study, a "Cells-to-cDNA on Chip" method is developed enabling on-chip mRNA isolation from live cells and conversion to cDNA in individual droplets of 200 nL. This novel method works efficiently to obtain cDNA from different cell numbers, down to single cell per droplet. This is the first established miniaturized on-chip strategy that enables the entire course of cell screening, phenotypic microscopy-based assessments along with mRNA isolation and its conversion to cDNA for gene expression analysis by real-time PCR on an open DMA platform. The principle demonstrated in this study sets a beginning for myriad of possible applications to obtain detailed information about the molecular dynamics in cultured cells.
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Affiliation(s)
- Shraddha Chakraborty
- Institute of Biological and Chemical Systems‐Functional Molecular Systems Karlsruhe Institute of Technology Hermann‐von‐Helmholtz‐Platz 1 Eggenstein‐Leopoldshafen 76344 Germany
| | - Charlotte Luchena
- Institute of Biological and Chemical Systems‐Functional Molecular Systems Karlsruhe Institute of Technology Hermann‐von‐Helmholtz‐Platz 1 Eggenstein‐Leopoldshafen 76344 Germany
| | - Jonathan J. Elton
- Institute of Biological and Chemical Systems‐Functional Molecular Systems Karlsruhe Institute of Technology Hermann‐von‐Helmholtz‐Platz 1 Eggenstein‐Leopoldshafen 76344 Germany
| | - Marcel P. Schilling
- Institute for Automation and Applied Informatics Karlsruhe Institute of Technology Hermann‐von‐Helmholtz‐Platz 1 Eggenstein‐Leopoldshafen 76344 Germany
| | - Markus Reischl
- Institute for Automation and Applied Informatics Karlsruhe Institute of Technology Hermann‐von‐Helmholtz‐Platz 1 Eggenstein‐Leopoldshafen 76344 Germany
| | - Margaux Roux
- Cellenion SASU Bioserra 2, 60 avenue Rockefeller Lyon 69008 France
| | - Pavel A. Levkin
- Institute of Biological and Chemical Systems‐Functional Molecular Systems Karlsruhe Institute of Technology Hermann‐von‐Helmholtz‐Platz 1 Eggenstein‐Leopoldshafen 76344 Germany
- Institute of Organic Chemistry Karlsruhe Institute of Technology Fritz‐Haber Weg 6 Karlsruhe 76131 Germany
| | - Anna A. Popova
- Institute of Biological and Chemical Systems‐Functional Molecular Systems Karlsruhe Institute of Technology Hermann‐von‐Helmholtz‐Platz 1 Eggenstein‐Leopoldshafen 76344 Germany
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Sheng L, Li M, Zheng S, Qi J. Adjusting the accuracy of PEGDA-GelMA vascular network by dark pigments via digital light processing printing. J Biomater Appl 2021; 36:1173-1187. [PMID: 34738507 DOI: 10.1177/08853282211053081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Vascularization is one of the most important factors greatly influencing scaffold regeneration. In this study, a precise network of hollow vessels was printed by digital light processing (DLP) with poly(ethylene glycol) diacrylate (PEGDA)/gelatin-methacryloyl (GelMA), and dark pigmentation absorbers were added to ensure printing accuracy. First, the compound bio-inks of the PEGDA-GelMA hydrogel were prepared for direct vascular printing, and a high-precision DLP system was established. Second, the printing effects of three dark absorbers, namely, nigrosin, brilliant black, and brilliant blue, on the x-, y-, and z-axes were studied. By printing models with different densities, it was determined that 0.2% nigrosin, 0.1% brilliant black, and 0.3% brilliant blue had better effects on the x- and y-axes accuracy, and the absorbance of the absorbers played a decisive role in adjusting the accuracy. Additionally, to solve the problem of uneven curing on the upper and lower surfaces caused by the addition of an absorber with high absorbance, a model of the difference in curing width between the upper and lower surfaces of a unit-layer slice based on high-absorbance absorbers was established, and the reference value for the slice thickness was calculated. Third, the biological and mechanical properties of the bio-inks were verified with scanning electron microscopy and Fourier transform infrared, and by tensile, swelling, degradation, and cytotoxicity tests on different concentrations of PEGDA-GelMA hydrogel and absorbers. The results showed that 30% PEGDA-7% GelMA/0.1% brilliant black was the optimal preparation to print a hollow vascular network. The error of the printing tube wall and cavity was between 1% and 3%, which demonstrates the high precision of the method. Human umbilical vein endothelial cells were planted in the lumen, and the survival rate achieved 107% on the seventh day, demonstrating the good biocompatibility of the composite hydrogel.
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Affiliation(s)
- Lin Sheng
- 12605Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, School of Mechanical Engineering, Tianjin University, Tianjin, China
| | - Mo Li
- 12605Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, School of Mechanical Engineering, Tianjin University, Tianjin, China
| | - Shuxian Zheng
- 12605Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, School of Mechanical Engineering, Tianjin University, Tianjin, China
| | - Jian Qi
- 66270School of Mechanical Engineering, Tianjin University of Technology and Education, China
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