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Mahmood A, Maher N, Amin F, Alqutaibi AY, Kumar N, Zafar MS. Chitosan-based materials for dental implantology: A comprehensive review. Int J Biol Macromol 2024; 268:131823. [PMID: 38677667 DOI: 10.1016/j.ijbiomac.2024.131823] [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: 01/11/2024] [Revised: 04/16/2024] [Accepted: 04/22/2024] [Indexed: 04/29/2024]
Abstract
Chitosan, a versatile biopolymer, has gained recognition in the discipline of dental implantology due to possessing salient properties. This comprehensive review explores the potential of chitosan in dental implants, focusing on its biocompatibility, bioactivity, and the various chitosan-based materials that have been utilized for dental implant therapy. The review also highlights the importance of surface treatment in dental implants to enhance osseointegration and inhibit bacterial biofilm formation. Additionally, the chemical structure, properties, and sources of chitosan are described, along with its different structural forms. The characteristics of chitosan particularly color, molecular weight, viscosity, and degree of deacetylation are discussed about their influence on its applications. This review provides valuable insights into the promising utilization of polymeric chitosan in enhancing the success and functionality of dental implants. This study highlights the potential applications of chitosan in oral implantology. Chitosan possesses various advantageous properties, including muco-adhesiveness, hemostatic action, biocompatibility, biodegradability, bioactivity, and antibacterial and antifungal activities, which enhance its uses in dental implantology. However, it has limited aqueous solubility at the physiological pH, which sometimes restricts its biological application, but this problem can be overcome by using modified chitosan or chitosan derivatives, which have also shown encouraging results. Recent research suggests that chitosan may act as a promising material for coating titanium-based implants, improving osteointegration together with antibacterial properties.
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Affiliation(s)
- Anum Mahmood
- Department of Science of Dental Materials, Dr. Ishrat Ul Ebad Khan Institute of Oral Health Sciences, Dow University of Health Sciences, Karachi 74200, Pakistan
| | - Nazrah Maher
- Department of Science of Dental Materials, Dr. Ishrat Ul Ebad Khan Institute of Oral Health Sciences, Dow University of Health Sciences, Karachi 74200, Pakistan
| | - Faiza Amin
- Department of Science of Dental Materials, Dow Dental College, Dow University of Health Sciences, Karachi 74200, Pakistan
| | - Ahmed Yaseen Alqutaibi
- Department of Substitutive Dental Sciences, College of Dentistry, Taibah University, Al Madinah, Saudi Arabia; Department of Prosthodontics, College of Dentistry, Ibb University, Ibb, Yemen
| | - Naresh Kumar
- Department of Science of Dental Materials, Dr. Ishrat Ul Ebad Khan Institute of Oral Health Sciences, Dow University of Health Sciences, Karachi 74200, Pakistan
| | - Muhammad Sohail Zafar
- Department of Restorative Dentistry, College of Dentistry, Taibah University, Al Madinah, Al Munawwarah, Saudi Arabia; Centre of Medical and Bio-allied Health Sciences Research, Ajman University, Ajman, Ajman 346, United Arab Emirates; School of Dentistry, University of Jordan, Amman, Jordan; Department of Dental Materials, Islamic International College, Riphah International University, Islamabad, Pakistan.
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2
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Zhao HC, Chen CZ, Song HQ, Wang XX, Zhang L, Zhao HL, He JF. Single-cell RNA Sequencing Analysis Reveals New Immune Disorder Complexities in Hypersplenism. Front Immunol 2022; 13:921900. [PMID: 35865544 PMCID: PMC9294158 DOI: 10.3389/fimmu.2022.921900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 05/30/2022] [Indexed: 11/13/2022] Open
Abstract
Hypersplenism (HS) is a concomitant symptom of liver or blood disease. Not only does the treatment of HS face challenges, but the transcriptome of individual cells is also unknown. Here, the transcriptional profiles of 43,037 cells from four HS tissues and one control tissue were generated by the single-cell RNA sequencing and nine major cell types, including T-cells, B-cells, NK cells, hematopoietic stem cells, neutrophil cells, mast cells, endothelial cells, erythrocytes, and dendritic cells were identified. Strikingly, the main features were the lack of CCL5+ B-cells in HS and the presence of SESN1+ B cells in HS with hepatocellular carcinoma (HS-HCC). In cell-cell interaction analysis, CD74-COPA and CD94-HLA-E in HS were found to be up-regulated. We further explored HS-specifically enriched genes (such as FKBP5, ADAR, and RPS4Y1) and found that FKBP5 was highly expressed in HCC-HS, leading to immunosuppression. Taken together, this research provides new insights into the genetic characteristics of HS via comprehensive single-cell transcriptome analysis.
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Affiliation(s)
- Hai-chao Zhao
- The Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, China
- Department of Hepatobiliary Surgery, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, China
| | - Chang-zhou Chen
- Department of Liver Surgery and Transplantation, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai, China
- Key Laboratory of Carcinogenesis and Cancer Invasion (Fudan University), Ministry of Education, Shanghai, China
- Institute of Biomedical Sciences, Fudan University, Shanghai, China
| | - Huang-qin Song
- The Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, China
| | - Xiao-xiao Wang
- The Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, China
| | - Lei Zhang
- Department of Hepatobiliary Surgery, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, China
- Hepatic Surgery Center, Institute of Hepato-Pancreato-Biliary Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hao-liang Zhao
- The Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, China
- Department of Hepatobiliary Surgery, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, China
- *Correspondence: Jie-feng He, ; Hao-liang Zhao,
| | - Jie-feng He
- The Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, China
- Department of Hepatobiliary Surgery, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, China
- *Correspondence: Jie-feng He, ; Hao-liang Zhao,
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3
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Vectorial Release of Human RNA Viruses from Epithelial Cells. Viruses 2022; 14:v14020231. [PMID: 35215825 PMCID: PMC8875463 DOI: 10.3390/v14020231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/07/2022] [Accepted: 01/21/2022] [Indexed: 02/04/2023] Open
Abstract
Epithelial cells are apico-basolateral polarized cells that line all tubular organs and are often targets for infectious agents. This review focuses on the release of human RNA virus particles from both sides of polarized human cells grown on transwells. Most viruses that infect the mucosa leave their host cells mainly via the apical side while basolateral release is linked to virus propagation within the host. Viruses do this by hijacking the cellular factors involved in polarization and trafficking. Thus, understanding epithelial polarization is essential for a clear understanding of virus pathophysiology.
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4
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Guided Self-Assembly of ES-Derived Lung Progenitors into Biomimetic Tube Structures That Impact Cell Differentiation. Bioengineering (Basel) 2021; 8:bioengineering8120209. [PMID: 34940362 PMCID: PMC8698605 DOI: 10.3390/bioengineering8120209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 12/03/2021] [Accepted: 12/05/2021] [Indexed: 11/25/2022] Open
Abstract
Chemically directed differentiation of pluripotent stem cells (PSCs) into defined cell types is a potent strategy for creating regenerative tissue models and cell therapies. In vitro observations suggest that physical cues can augment directed differentiation. We recently demonstrated that confining human PSC-derived lung progenitor cells in a tube with a diameter that mimics those observed during lung development results in the alteration of cell differentiation towards SOX2−SOX9+ lung cells. Here we set out to assess the robustness of this geometric confinement effect with respect to different culture parameters in order to explore the corresponding changes in cell morphometry and determine the feasibility of using such an approach to enhance directed differentiation protocols. Culture of progenitor cells in polydimethylsiloxane (PDMS) tubes reliably induced self-organization into tube structures and was insensitive to a variety of extracellular matrix coatings. Cellular morphology and differentiation status were found to be sensitive to the diameter of tube cells that were cultured within but not to seeding density. These data suggest that geometric cues impose constraints on cells, homogenize cellular morphology, and influence fate status.
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5
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Varma R, Marin‐Araujo AE, Rostami S, Waddell TK, Karoubi G, Haykal S. Short-Term Preclinical Application of Functional Human Induced Pluripotent Stem Cell-Derived Airway Epithelial Patches. Adv Healthc Mater 2021; 10:e2100957. [PMID: 34569180 DOI: 10.1002/adhm.202100957] [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: 05/17/2021] [Revised: 08/15/2021] [Indexed: 12/17/2022]
Abstract
Airway pathologies including cancer, trauma, and stenosis lack effective treatments, meanwhile airway transplantation and available tissue engineering approaches fail due to epithelial dysfunction. Autologous progenitors do not meet the clinical need for regeneration due to their insufficient expansion and differentiation, for which human induced pluripotent stem cells (hiPSCs) are promising alternatives. Airway epithelial patches are engineered by differentiating hiPSC-derived airway progenitors into physiological proportions of ciliated (73.9 ± 5.5%) and goblet (2.1 ± 1.4%) cells on a silk fibroin-collagen vitrigel membrane (SF-CVM) composite biomaterial for transplantation in porcine tracheal defects ex vivo and in vivo. Evaluation of ex vivo tracheal repair using hiPSC-derived SF-CVM patches demonstrate native-like tracheal epithelial metabolism and maintenance of mucociliary epithelium to day 3. In vivo studies demonstrate SF-CVM integration and maintenance of airway patency, showing 80.8 ± 3.6% graft coverage with an hiPSC-derived pseudostratified epithelium and 70.7 ± 2.3% coverage with viable cells, 3 days postoperatively. The utility of bioengineered, hiPSC-derived epithelial patches for airway repair is demonstrated in a short-term preclinical survival model, providing a significant leap for airway reconstruction approaches.
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Affiliation(s)
- Ratna Varma
- Latner Thoracic Surgery Laboratories Toronto General Hospital Research Institute University Health Network Toronto General Hospital University of Toronto 101 College St Toronto ON M5G 0A3 Canada
- Institute of Biomedical Engineering (BME) University of Toronto 164 College St Toronto ON M5S 3G9 Canada
| | - Alba E. Marin‐Araujo
- Latner Thoracic Surgery Laboratories Toronto General Hospital Research Institute University Health Network Toronto General Hospital University of Toronto 101 College St Toronto ON M5G 0A3 Canada
| | - Sara Rostami
- Latner Thoracic Surgery Laboratories Toronto General Hospital Research Institute University Health Network Toronto General Hospital University of Toronto 101 College St Toronto ON M5G 0A3 Canada
| | - Thomas K. Waddell
- Latner Thoracic Surgery Laboratories Toronto General Hospital Research Institute University Health Network Toronto General Hospital University of Toronto 101 College St Toronto ON M5G 0A3 Canada
- Institute of Biomedical Engineering (BME) University of Toronto 164 College St Toronto ON M5S 3G9 Canada
- Institute of Medical Sciences University of Toronto 27 King's College Cir Toronto ON M5S 1A8 Canada
| | - Golnaz Karoubi
- Latner Thoracic Surgery Laboratories Toronto General Hospital Research Institute University Health Network Toronto General Hospital University of Toronto 101 College St Toronto ON M5G 0A3 Canada
- Department of Mechanical and Industrial Engineering University of Toronto 5 King's College Circle Toronto ON M5S 3G8 Canada
- Department of Laboratory Medicine and Pathobiology University of Toronto 1 King's College Circle Toronto ON M5S 1A8 Canada
| | - Siba Haykal
- Latner Thoracic Surgery Laboratories Toronto General Hospital Research Institute University Health Network Toronto General Hospital University of Toronto 101 College St Toronto ON M5G 0A3 Canada
- Institute of Medical Sciences University of Toronto 27 King's College Cir Toronto ON M5S 1A8 Canada
- Division of Plastic and Reconstructive Surgery Department of Surgery University of Toronto 200 Elizabeth Street 8N‐869 Toronto ON M5G2P7 Canada
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6
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Siao RF, Lin CH, Chen LH, Wang LC. Establishment of a striped catfish skin explant model for studying the skin response in Aeromonas hydrophila infections. Sci Rep 2021; 11:19057. [PMID: 34561532 PMCID: PMC8463585 DOI: 10.1038/s41598-021-98583-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 09/09/2021] [Indexed: 12/04/2022] Open
Abstract
Teleost fish skin serves as the first line of defense against pathogens. The interaction between pathogen and host skin determines the infection outcome. However, the mechanism(s) that modulate infection remain largely unknown. A proper tissue culture model that is easier to handle but can quantitatively and qualitatively monitor infection progress may shed some lights. Here, we use striped catfish (Pangasius hypophthalmus) to establish an ex vivo skin explant tissue culture model to explore host pathogen interactions. The skin explant model resembles in vivo skin in tissue morphology, integrity, and immune functionality. Inoculation of aquatic pathogen Aeromonas hydrophila in this model induces epidermal exfoliation along with epithelial cell dissociation and inflammation. We conclude that this ex vivo skin explant model could serve as a teleost skin infection model for monitoring pathogenesis under various infection conditions. The model can also potentially be translated into a platform to study prevention and treatment of aquatic infection on the skin in aquaculture applications.
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Affiliation(s)
- Ru-Fang Siao
- Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Chia-Hsuan Lin
- Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Li-Hsuan Chen
- Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Liang-Chun Wang
- Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung, Taiwan.
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7
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Park AJ, Wright MA, Roach EJ, Khursigara CM. Imaging host-pathogen interactions using epithelial and bacterial cell infection models. J Cell Sci 2021; 134:134/5/jcs250647. [PMID: 33622798 DOI: 10.1242/jcs.250647] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The age-old saying, seeing is believing, could not be truer when we think about the value of imaging interactions between epithelial cells and bacterial pathogens. Imaging and culturing techniques have vastly improved over the years, and the breadth and depth of these methods is ever increasing. These technical advances have benefited researchers greatly; however, due to the large number of potential model systems and microscopy techniques to choose from, it can be overwhelming to select the most appropriate tools for your research question. This Review discusses a variety of available epithelial culturing methods and quality control experiments that can be performed, and outlines various options commonly used to fluorescently label bacterial and mammalian cell components. Both light- and electron-microscopy techniques are reviewed, with descriptions of both technical aspects and common applications. Several examples of imaging bacterial pathogens and their interactions with epithelial cells are discussed to provide researchers with an idea of the types of biological questions that can be successfully answered by using microscopy.
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Affiliation(s)
- Amber J Park
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Madison A Wright
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Elyse J Roach
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada.,Molecular and Cellular Imaging Facility, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Cezar M Khursigara
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada .,Molecular and Cellular Imaging Facility, University of Guelph, Guelph, Ontario N1G 2W1, Canada
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8
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Wang Z, Kapadia W, Li C, Lin F, Pereira RF, Granja PL, Sarmento B, Cui W. Tissue-specific engineering: 3D bioprinting in regenerative medicine. J Control Release 2021; 329:237-256. [DOI: 10.1016/j.jconrel.2020.11.044] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/19/2020] [Accepted: 11/23/2020] [Indexed: 12/18/2022]
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9
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Schwab R, Heller M, Pfeifer C, Unger RE, Walenta S, Nezi-Cahn S, Al-Nawas B, Hasenburg A, Brenner W. Full-thickness tissue engineered oral mucosa for genitourinary reconstruction: A comparison of different collagen-based biodegradable membranes. J Biomed Mater Res B Appl Biomater 2020; 109:572-583. [PMID: 32914546 DOI: 10.1002/jbm.b.34724] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 07/28/2020] [Accepted: 09/02/2020] [Indexed: 11/07/2022]
Abstract
Tissue engineering is a method of growing importance regarding clinical application in the genitourinary region. One of the key factors in successfully development of an artificially tissue engineered mucosa equivalent (TEOM) is the optimal choice of the scaffold. Collagen scaffolds are regarded as gold standard in dermal tissue reconstruction. Four distinct collagen scaffolds were evaluated for the ability to support the development of an organotypical tissue architecture. TEOMs were established by seeding cocultures of primary oral epithelial cells and fibroblasts on four distinct collagen membranes. Cell viability was assessed by MTT-assay. The 3D architecture and functionality of the tissue engineered oral mucosa equivalents were evaluated by confocal laser-scanning microscopy and immunostaining. Cell viability was reduced on the TissuFoil E® membrane. A multi-stratified epithelial layer was established on all four materials, however the TEOMs on the Bio-Gide® scaffold showed the best fibroblast differentiation, secretion of tenascin and fibroblast migration into the membrane. The TEOMs generated on Bio-Gide® scaffold exhibited the optimal cellular organization into a cellular 3D network. Thus, the Bio-Gide® scaffold is a suitable matrix for engineering of mucosa substitutes in vitro.
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Affiliation(s)
- Roxana Schwab
- Department of Gynecology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany.,For BiomaTiCS-Biomaterials, Tissue and Cells in Science, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Martin Heller
- Department of Gynecology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany.,For BiomaTiCS-Biomaterials, Tissue and Cells in Science, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Céline Pfeifer
- For BiomaTiCS-Biomaterials, Tissue and Cells in Science, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany.,Department of Urology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Ronald E Unger
- For BiomaTiCS-Biomaterials, Tissue and Cells in Science, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany.,Department of Pathology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Stefan Walenta
- Institute of Pathophysiology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Sandra Nezi-Cahn
- Department of Gynecology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany.,For BiomaTiCS-Biomaterials, Tissue and Cells in Science, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Bilal Al-Nawas
- For BiomaTiCS-Biomaterials, Tissue and Cells in Science, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany.,Department of Maxillofacial Surgery, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Annette Hasenburg
- Department of Gynecology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany.,For BiomaTiCS-Biomaterials, Tissue and Cells in Science, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Walburgis Brenner
- Department of Gynecology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany.,For BiomaTiCS-Biomaterials, Tissue and Cells in Science, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany.,Department of Urology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
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10
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Abstract
Brain tumors' severity ranges from benign to highly aggressive and invasive. Bioengineering tools can assist in understanding the pathophysiology of these tumors from outside the body and facilitate development of suitable antitumoral treatments. Here, we first describe the physiology and cellular composition of brain tumors. Then, we discuss the development of three-dimensional tissue models utilizing brain tumor cells. In particular, we highlight the role of hydrogels in providing a biomimetic support for the cells to grow into defined structures. Microscale technologies, such as electrospinning and bioprinting, and advanced cellular models aim to mimic the extracellular matrix and natural cellular localization in engineered tumor tissues. Lastly, we review current applications and prospects of hydrogels for therapeutic purposes, such as drug delivery and co-administration with other therapies. Through further development, hydrogels can serve as a reliable option for in vitro modeling and treatment of brain tumors for translational medicine.
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11
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Modeling the Efficacy of Oncolytic Adenoviruses In Vitro and In Vivo: Current and Future Perspectives. Cancers (Basel) 2020; 12:cancers12030619. [PMID: 32155969 PMCID: PMC7139921 DOI: 10.3390/cancers12030619] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 03/03/2020] [Accepted: 03/04/2020] [Indexed: 02/06/2023] Open
Abstract
Oncolytic adenoviruses (OAd) selectively target and lyse tumor cells and enhance anti- tumor immune responses. OAds have been used as promising cancer gene therapies for many years and there are a multitude of encouraging pre-clinical studies. However, translating OAd therapies to the clinic has had limited success, in part due to the lack of realistic pre-clinical models to rigorously test the efficacy of OAds. Solid tumors have a heterogenous and hostile microenvironment that provides many barriers to OAd treatment, including structural and immunosuppressive components that cannot be modeled in two-dimensional tissue culture. To replicate these characteristics and bridge the gap between pre-clinical and clinical success, studies must test OAd therapy in three-dimensional culture and animal models. This review focuses on current methods to test OAd efficacy in vitro and in vivo and the development of new model systems to test both oncolysis and immune stimulatory components of oncolytic adenovirotherapy.
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12
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Farhadihosseinabadi B, Zarebkohan A, Eftekhary M, Heiat M, Moosazadeh Moghaddam M, Gholipourmalekabadi M. Crosstalk between chitosan and cell signaling pathways. Cell Mol Life Sci 2019; 76:2697-2718. [PMID: 31030227 PMCID: PMC11105701 DOI: 10.1007/s00018-019-03107-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 03/30/2019] [Accepted: 04/15/2019] [Indexed: 12/25/2022]
Abstract
The field of tissue engineering (TE) experiences its most exciting time in the current decade. Recent progresses in TE have made it able to translate into clinical applications. To regenerate damaged tissues, TE uses biomaterial scaffolds to prepare a suitable backbone for tissue regeneration. It is well proven that the cell-biomaterial crosstalk impacts tremendously on cell biological activities such as differentiation, proliferation, migration, and others. Clarification of exact biological effects and mechanisms of a certain material on various cell types promises to have a profound impact on clinical applications of TE. Chitosan (CS) is one of the most commonly used biomaterials with many promising characteristics such as biocompatibility, antibacterial activity, biodegradability, and others. In this review, we discuss crosstalk between CS and various cell types to provide a roadmap for more effective applications of this polymer for future uses in tissue engineering and regenerative medicine.
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Affiliation(s)
- Behrouz Farhadihosseinabadi
- Department of Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Amir Zarebkohan
- Department of Medical Nanotechnology, Faculty of Advanced Medical Science, Tabriz University of Medical Science, Tabriz, Iran
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohamad Eftekhary
- Department of Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Heiat
- Baqiyatallah Research Center for Gastroenterology and Liver Diseases, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | | | - Mazaher Gholipourmalekabadi
- Cellular and Molecular Research Centre, Iran University of Medical Sciences, Tehran, Iran.
- Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran.
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13
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Zakhem E, Raghavan S, Suhar RA, Bitar KN. Bioengineering and regeneration of gastrointestinal tissue: where are we now and what comes next? Expert Opin Biol Ther 2019; 19:527-537. [PMID: 30880502 DOI: 10.1080/14712598.2019.1595579] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
INTRODUCTION The field of tissue engineering and regenerative medicine has been applied to the gastrointestinal (GI) tract for a couple decades. Several achievements have been accomplished that provide promising tools for treating diseases of the GI tract. AREAS COVERED The work described in this review covers the traditional aspect of using cells and scaffolds to replace parts of the tract. Several studies investigated different types of biomaterials and different types of cells. A more recent approach involved the use of gut-derived organoid units that can differentiate into all gut cell layers. The most recent approach introduced the use of organ-on-a-chip concept to understand the physiology and pathophysiology of the GI system. EXPERT OPINION The different approaches tackle the diseases of the GI tract from different perspectives. While all these different approaches provide a promising and encouraging future for this field, the translational aspect is yet to be studied.
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Affiliation(s)
- Elie Zakhem
- a Wake Forest Institute for Regenerative Medicine , Wake Forest School of Medicine , Winston Salem , NC , USA.,b Section on Gastroenterology , Wake Forest School of Medicine , Winston Salem , NC , USA
| | - Shreya Raghavan
- c Department of Materials Science and Engineering , University of Michigan , Ann Arbor , MI , USA
| | - Riley A Suhar
- d Department of Materials Science and Engineering , Stanford University , Stanford , CA , USA
| | - Khalil N Bitar
- a Wake Forest Institute for Regenerative Medicine , Wake Forest School of Medicine , Winston Salem , NC , USA.,b Section on Gastroenterology , Wake Forest School of Medicine , Winston Salem , NC , USA.,e Virginia Tech-Wake Forest School of Biomedical Engineering Sciences , Winston-Salem , NC , USA
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14
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Bauer HK, Flesch D, Walenta S, Unger RE, Schwab R, Nezi-Cahn S, Hasenburg A, Heller M, Brenner W. Primary Mucosal Epithelial Cell Cultivation: A Reliable and Accelerated Isolation. Tissue Eng Part C Methods 2019; 25:82-92. [DOI: 10.1089/ten.tec.2018.0327] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Affiliation(s)
- Heide-Katharina Bauer
- Department of Obstetrics and Women's Health, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- BiomaTiCS - Biomaterials, Tissues and Cells in Science, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Daniela Flesch
- BiomaTiCS - Biomaterials, Tissues and Cells in Science, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- Department of Urology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Stefan Walenta
- Institute of Pathophysiology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Ronald E. Unger
- BiomaTiCS - Biomaterials, Tissues and Cells in Science, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- Institute of Pathology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Roxana Schwab
- Department of Obstetrics and Women's Health, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- BiomaTiCS - Biomaterials, Tissues and Cells in Science, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Sandra Nezi-Cahn
- Department of Obstetrics and Women's Health, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- BiomaTiCS - Biomaterials, Tissues and Cells in Science, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Annette Hasenburg
- Department of Obstetrics and Women's Health, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Martin Heller
- Department of Obstetrics and Women's Health, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- BiomaTiCS - Biomaterials, Tissues and Cells in Science, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Walburgis Brenner
- Department of Obstetrics and Women's Health, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- BiomaTiCS - Biomaterials, Tissues and Cells in Science, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
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15
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High-strength and self-recoverable silk fibroin cryogels with anisotropic swelling and mechanical properties. Int J Biol Macromol 2019; 122:1279-1289. [DOI: 10.1016/j.ijbiomac.2018.09.087] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 09/01/2018] [Accepted: 09/14/2018] [Indexed: 11/21/2022]
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16
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Varma R, Aoki FG, Soon K, Karoubi G, Waddell TK. Optimal biomaterials for tracheal epithelial grafts: An in vitro systematic comparative analysis. Acta Biomater 2018; 81:146-157. [PMID: 30268918 DOI: 10.1016/j.actbio.2018.09.048] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 09/19/2018] [Accepted: 09/26/2018] [Indexed: 12/17/2022]
Abstract
Tracheal injury, stenosis, and malignancy demand tracheal reconstruction, which often fails due to the lack of a functioning epithelium. We performed an extensive comparative analysis to determine optimal biomaterials for developing tracheal epithelial grafts with mucociliary function. We screened Hyaluronan-Poly(Ethylene Glycol), Chitosan-Collagen, Collagen Vitrigel Membrane, Fibrin Glue, Silk Fibroin, and Gelatin based on various parameters including mechanical strength, bulk degradation, cell attachment, spreading, metabolic activity, focal adhesion formation, and differentiation into ciliated and goblet cells. Silk Fibroin had significantly higher tensile strength (21.23 ± 4.42 MPa), retained 50% of its mass across 5 weeks, allowed 80-100% cell spreading and increasing metabolic activity across 10 days, focal adhesion formation within 2 h, and differentiation into 5.9 ± 2.6% goblet cells. Silk Fibroin, however, led to poor ciliation, producing 5.5 ± 3.9% ciliated cells, whereas Collagen Vitrigel Membrane promoted excellent ciliation. To capitalize on the mechanical and differentiation benefits of its respective components, we developed a composite biomaterial of Silk Fibroin and Collagen Vitrigel Membrane (SF-CVM), which demonstrated enhanced maturation into 20.6 ± 1.7% ciliated and 5.6 ± 1.0% goblet cells. Development of biomaterials-based airway epithelial grafts that provide desirable mechanics and differentiation is a major step towards treatment of airway disease. STATEMENT OF SIGNIFICANCE: Tracheal blockage, injury, and malignancy greater than 50% of the adult tracheal length cannot be safely resected. Tracheal replacement is one approach, but a major cause of transplant failure is the lack of a functioning epithelium. While tissue engineering for tracheal regeneration using biomaterials is promising, there is currently no gold standard. Therefore, we performed a systematic comparative study to characterize relevant materials for generating a biomaterials-based airway epithelial graft. We developed a composite biomaterial intended for surgical implantation providing tensile strength, slow biodegradation, and optimal support for differentiation of mature epithelia. This is a significant step augmenting current state-of-the-art methods for airway surgeries, laryngeal reconstruction, and tracheal tissue engineering.
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Affiliation(s)
- Ratna Varma
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada; Latner Thoracic Surgery Research Laboratories and the McEwen Centre for Regenerative Medicine, Toronto General Hospital, 101 College St, Toronto, ON M5G 1L7, Canada.
| | - Fabio G Aoki
- Latner Thoracic Surgery Research Laboratories and the McEwen Centre for Regenerative Medicine, Toronto General Hospital, 101 College St, Toronto, ON M5G 1L7, Canada
| | - Kayla Soon
- Latner Thoracic Surgery Research Laboratories and the McEwen Centre for Regenerative Medicine, Toronto General Hospital, 101 College St, Toronto, ON M5G 1L7, Canada
| | - Golnaz Karoubi
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada; Latner Thoracic Surgery Research Laboratories and the McEwen Centre for Regenerative Medicine, Toronto General Hospital, 101 College St, Toronto, ON M5G 1L7, Canada.
| | - Thomas K Waddell
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada; Latner Thoracic Surgery Research Laboratories and the McEwen Centre for Regenerative Medicine, Toronto General Hospital, 101 College St, Toronto, ON M5G 1L7, Canada; Institute of Medical Science, University of Toronto, 1 King's College Circle, Toronto, ON M5S 1A8, Canada.
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17
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Thuenauer R, Nicklaus S, Frensch M, Troendle K, Madl J, Römer W. A microfluidic biochip for locally confined stimulation of cells within an epithelial monolayer. RSC Adv 2018; 8:7839-7846. [PMID: 29552338 PMCID: PMC5830875 DOI: 10.1039/c7ra11943g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 02/11/2018] [Indexed: 12/13/2022] Open
Abstract
A key factor determining the fate of individual cells within an epithelium is the unique microenvironment that surrounds each cell. It regulates location-dependent differentiation into specific cellular sub-types, but, on the other hand, a disturbed microenvironment can promote malignant transformation of epithelial cells leading to cancer formation. Here, we present a tool based on a microfluidic biochip that enables novel research approaches by providing a means to control the basolateral microenvironment of a confined number of neighbouring cells within an epithelial monolayer. Through isolated single pores in a thin membrane carrying the epithelial cell layer only cells above the pores are stimulated by solutes. The very thin design of the biochip (<75 μm) enabled us to apply a high-resolution inverted confocal fluorescence microscope to show by live cell imaging that such a manipulation of the microenvironment remained locally restricted to cells located above the pores. In addition, the biochip allows access for the force probe of an atomic force microscope (AFM) from the apical side to determine the topography and mechanical properties of individual cells, which we demonstrated by combined AFM and fluorescence microscopy imaging experiments. Taken together, the presented microfluidic biochip is a powerful tool that will enable studying the initial steps of malignant transformation of epithelial cells by directly manipulating their microenvironment and by real-time monitoring of affected cells with fluorescence microscopy and AFM. We developed a microfluidic biochip that enables one to locally change the basolateral microenvironment of epithelial cells within a polarised monolayer.![]()
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Affiliation(s)
- Roland Thuenauer
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraße 1, 79104 Freiburg, Germany. ; .,BIOSS - Centre for Biological Signalling Studies, Albert-Ludwigs-University Freiburg, Schänzlestraβe 18, 79104 Freiburg, Germany.,Freiburg Center for Interactive Materials and Bioinspired Technology (FIT), Albert-Ludwigs-University Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
| | - Simon Nicklaus
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraße 1, 79104 Freiburg, Germany. ; .,BIOSS - Centre for Biological Signalling Studies, Albert-Ludwigs-University Freiburg, Schänzlestraβe 18, 79104 Freiburg, Germany.,Freiburg Center for Interactive Materials and Bioinspired Technology (FIT), Albert-Ludwigs-University Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
| | - Marco Frensch
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraße 1, 79104 Freiburg, Germany. ; .,BIOSS - Centre for Biological Signalling Studies, Albert-Ludwigs-University Freiburg, Schänzlestraβe 18, 79104 Freiburg, Germany.,Freiburg Center for Interactive Materials and Bioinspired Technology (FIT), Albert-Ludwigs-University Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany.,International Max Planck Research School for Molecular and Cellular Biology, Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, 79108 Freiburg, Germany
| | - Kevin Troendle
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraße 1, 79104 Freiburg, Germany. ; .,BIOSS - Centre for Biological Signalling Studies, Albert-Ludwigs-University Freiburg, Schänzlestraβe 18, 79104 Freiburg, Germany
| | - Josef Madl
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraße 1, 79104 Freiburg, Germany. ; .,BIOSS - Centre for Biological Signalling Studies, Albert-Ludwigs-University Freiburg, Schänzlestraβe 18, 79104 Freiburg, Germany.,Freiburg Center for Interactive Materials and Bioinspired Technology (FIT), Albert-Ludwigs-University Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
| | - Winfried Römer
- Faculty of Biology, Albert-Ludwigs-University Freiburg, Schänzlestraße 1, 79104 Freiburg, Germany. ; .,BIOSS - Centre for Biological Signalling Studies, Albert-Ludwigs-University Freiburg, Schänzlestraβe 18, 79104 Freiburg, Germany.,Freiburg Center for Interactive Materials and Bioinspired Technology (FIT), Albert-Ludwigs-University Freiburg, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
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18
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Pedde RD, Mirani B, Navaei A, Styan T, Wong S, Mehrali M, Thakur A, Mohtaram NK, Bayati A, Dolatshahi-Pirouz A, Nikkhah M, Willerth SM, Akbari M. Emerging Biofabrication Strategies for Engineering Complex Tissue Constructs. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1606061. [PMID: 28370405 DOI: 10.1002/adma.201606061] [Citation(s) in RCA: 219] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 01/16/2017] [Indexed: 05/24/2023]
Abstract
The demand for organ transplantation and repair, coupled with a shortage of available donors, poses an urgent clinical need for the development of innovative treatment strategies for long-term repair and regeneration of injured or diseased tissues and organs. Bioengineering organs, by growing patient-derived cells in biomaterial scaffolds in the presence of pertinent physicochemical signals, provides a promising solution to meet this demand. However, recapitulating the structural and cytoarchitectural complexities of native tissues in vitro remains a significant challenge to be addressed. Through tremendous efforts over the past decade, several innovative biofabrication strategies have been developed to overcome these challenges. This review highlights recent work on emerging three-dimensional bioprinting and textile techniques, compares the advantages and shortcomings of these approaches, outlines the use of common biomaterials and advanced hybrid scaffolds, and describes several design considerations including the structural, physical, biological, and economical parameters that are crucial for the fabrication of functional, complex, engineered tissues. Finally, the applications of these biofabrication strategies in neural, skin, connective, and muscle tissue engineering are explored.
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Affiliation(s)
- R Daniel Pedde
- Laboratory for Innovations in Microengineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC, V8P 5C2, Canada
| | - Bahram Mirani
- Laboratory for Innovations in Microengineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC, V8P 5C2, Canada
| | - Ali Navaei
- School of Biological and Health Systems Engineering (SBHSE), Arizona State University, Tempe, AZ, 85281, USA
| | - Tara Styan
- Willerth Laboratory, Department of Mechanical Engineering and Division of Medical Sciences, University of Victoria, Victoria, V8P 5C2, Canada
| | - Sarah Wong
- Willerth Laboratory, Department of Mechanical Engineering and Division of Medical Sciences, University of Victoria, Victoria, V8P 5C2, Canada
| | - Mehdi Mehrali
- Department of Micro- and Nanotechnology, Center for Nanomedicine and Theranostics, Technical University of Denmark, Kgs. Lyngby, 2800, Denmark
| | - Ashish Thakur
- Department of Micro- and Nanotechnology, Center for Nanomedicine and Theranostics, Technical University of Denmark, Kgs. Lyngby, 2800, Denmark
| | - Nima Khadem Mohtaram
- Laboratory for Innovations in Microengineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC, V8P 5C2, Canada
| | - Armin Bayati
- Willerth Laboratory, Department of Mechanical Engineering and Division of Medical Sciences, University of Victoria, Victoria, V8P 5C2, Canada
| | - Alireza Dolatshahi-Pirouz
- Department of Micro- and Nanotechnology, Center for Nanomedicine and Theranostics, Technical University of Denmark, Kgs. Lyngby, 2800, Denmark
| | - Mehdi Nikkhah
- School of Biological and Health Systems Engineering (SBHSE), Arizona State University, Tempe, AZ, 85281, USA
| | - Stephanie M Willerth
- Willerth Laboratory, Department of Mechanical Engineering and Division of Medical Sciences, University of Victoria, Victoria, V8P 5C2, Canada
| | - Mohsen Akbari
- Laboratory for Innovations in Microengineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC, V8P 5C2, Canada
- Center for Advanced Materials and Related Technologies (CAMTEC), University of Victoria, Victoria, V8P 5C2, Canada
- Center for Biomedical Research, University of Victoria, Victoria, V8P 5C2, Canada
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19
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Patil SV, Nanduri LSY. Interaction of chitin/chitosan with salivary and other epithelial cells-An overview. Int J Biol Macromol 2017; 104:1398-1406. [PMID: 28315439 DOI: 10.1016/j.ijbiomac.2017.03.058] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 03/03/2017] [Accepted: 03/11/2017] [Indexed: 01/26/2023]
Abstract
Chitin and its deacetylated form, chitosan, have been widely used for tissue engineering of both epithelial and mesenchymal tissues. Epithelial cells characterised by their sheet-like tight cellular arrangement and polarised nature, constitute a major component in various organs and play a variety of roles including protection, secretion and maintenance of tissue homeostasis. Regeneration of damaged epithelial tissues has been studied using biomaterials such as chitin, chitosan, hyaluronan, gelatin and alginate. Chitin and chitosan are known to promote proliferation of various embryonic and adult epithelial cells. However it is not clearly understood how this activity is achieved or what are the mechanisms involved in the chitin/chitosan driven proliferation of epithelial cells. Mechanistic understanding of influence of chitin/chitosan on epithelial cells will guide us to develop more targeted regenerative scaffold/hydrogel systems. Therefore, current review attempts to elicit a mechanistic insight into how chitin and chitosan interact with salivary, mammary, skin, nasal, lung, intestinal and bladder epithelial cells.
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Affiliation(s)
| | - Lalitha S Y Nanduri
- Centre for Nanosciences and Molecular Medicine, Amrita University, Kochi, Kerala 682041, India.
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20
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Abstract
Functions of the gastrointestinal tract include motility, digestion and absorption of nutrients. These functions are mediated by several specialized cell types including smooth muscle cells, neurons, interstitial cells and epithelial cells. In gastrointestinal diseases, some of the cells become degenerated or fail to accomplish their normal functions. Surgical resection of the diseased segments of the gastrointestinal tract is considered the gold-standard treatment in many cases, but patients might have surgical complications and quality of life can remain low. Tissue engineering and regenerative medicine aim to restore, repair, or regenerate the function of the tissues. Gastrointestinal tissue engineering is a challenging process given the specific phenotype and alignment of each cell type that colonizes the tract - these properties are critical for proper functionality. In this Review, we summarize advances in the field of gastrointestinal tissue engineering and regenerative medicine. Although the findings are promising, additional studies and optimizations are needed for translational purposes.
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Affiliation(s)
- Khalil N Bitar
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, 391 Technology Way NE, Winston Salem, North Carolina 27101, USA.,Department of Molecular Medicine and Translational Sciences, Wake Forest School of Medicine, 1 Medical Center Blvd, Winston Salem, North Carolina 27157, USA.,Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, 391 Technology Way NE, Winston Salem, North Carolina 27101, USA
| | - Elie Zakhem
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, 391 Technology Way NE, Winston Salem, North Carolina 27101, USA.,Department of Molecular Medicine and Translational Sciences, Wake Forest School of Medicine, 1 Medical Center Blvd, Winston Salem, North Carolina 27157, USA
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21
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Micropatterning strategies to engineer controlled cell and tissue architecture in vitro. Biotechniques 2015; 58:13-23. [PMID: 25605576 DOI: 10.2144/000114245] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 12/26/2014] [Indexed: 11/23/2022] Open
Abstract
Micropatterning strategies, which enable control over cell and tissue architecture in vitro, have emerged as powerful platforms for modelling tissue microenvironments at different scales and complexities. Here, we provide an overview of popular micropatterning techniques, along with detailed descriptions, to guide new users through the decision making process of which micropatterning procedure to use, and how to best obtain desired tissue patterns. Example techniques and the types of biological observations that can be made are provided from the literature. A focus is placed on microcontact printing to obtain co-cultures of patterned, confluent sheets, and the challenges associated with optimizing this protocol. Many issues associated with microcontact printing, however, are relevant to all micropatterning methodologies. Finally, we briefly discuss challenges in addressing key limitations associated with current micropatterning technologies.
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